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/*
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* QEMU PC System Emulator
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
| 28 |
#include <getopt.h> |
| 29 |
#include <inttypes.h> |
| 30 |
#include <unistd.h> |
| 31 |
#include <sys/mman.h> |
| 32 |
#include <fcntl.h> |
| 33 |
#include <signal.h> |
| 34 |
#include <time.h> |
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#include <sys/time.h> |
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#include <malloc.h> |
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#include <termios.h> |
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#include <sys/poll.h> |
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#include <errno.h> |
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#include <sys/wait.h> |
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|
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#include <sys/ioctl.h> |
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#include <sys/socket.h> |
| 44 |
#include <linux/if.h> |
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#include <linux/if_tun.h> |
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|
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#include "cpu-i386.h" |
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#include "disas.h" |
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#include "thunk.h" |
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|
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#include "vl.h" |
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|
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#define DEBUG_LOGFILE "/tmp/vl.log" |
| 54 |
#define DEFAULT_NETWORK_SCRIPT "/etc/vl-ifup" |
| 55 |
|
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//#define DEBUG_UNUSED_IOPORT
|
| 57 |
//#define DEBUG_IRQ_LATENCY
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| 58 |
|
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#define PHYS_RAM_BASE 0xac000000 |
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#define PHYS_RAM_MAX_SIZE (256 * 1024 * 1024) |
| 61 |
|
| 62 |
#define KERNEL_LOAD_ADDR 0x00100000 |
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#define INITRD_LOAD_ADDR 0x00400000 |
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#define KERNEL_PARAMS_ADDR 0x00090000 |
| 65 |
|
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/* from plex86 (BSD license) */
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struct __attribute__ ((packed)) linux_params {
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// For 0x00..0x3f, see 'struct screen_info' in linux/include/linux/tty.h.
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// I just padded out the VESA parts, rather than define them.
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|
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/* 0x000 */ uint8_t orig_x;
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/* 0x001 */ uint8_t orig_y;
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/* 0x002 */ uint16_t ext_mem_k;
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/* 0x004 */ uint16_t orig_video_page;
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/* 0x006 */ uint8_t orig_video_mode;
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/* 0x007 */ uint8_t orig_video_cols;
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/* 0x008 */ uint16_t unused1;
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/* 0x00a */ uint16_t orig_video_ega_bx;
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/* 0x00c */ uint16_t unused2;
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/* 0x00e */ uint8_t orig_video_lines;
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/* 0x00f */ uint8_t orig_video_isVGA;
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/* 0x010 */ uint16_t orig_video_points;
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/* 0x012 */ uint8_t pad0[0x20 - 0x12]; // VESA info. |
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/* 0x020 */ uint16_t cl_magic; // Commandline magic number (0xA33F) |
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/* 0x022 */ uint16_t cl_offset; // Commandline offset. Address of commandline |
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// is calculated as 0x90000 + cl_offset, bu
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// only if cl_magic == 0xA33F.
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/* 0x024 */ uint8_t pad1[0x40 - 0x24]; // VESA info. |
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|
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/* 0x040 */ uint8_t apm_bios_info[20]; // struct apm_bios_info |
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/* 0x054 */ uint8_t pad2[0x80 - 0x54]; |
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|
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// Following 2 from 'struct drive_info_struct' in drivers/block/cciss.h.
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// Might be truncated?
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/* 0x080 */ uint8_t hd0_info[16]; // hd0-disk-parameter from intvector 0x41 |
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/* 0x090 */ uint8_t hd1_info[16]; // hd1-disk-parameter from intvector 0x46 |
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|
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// System description table truncated to 16 bytes
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// From 'struct sys_desc_table_struct' in linux/arch/i386/kernel/setup.c.
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/* 0x0a0 */ uint16_t sys_description_len;
|
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/* 0x0a2 */ uint8_t sys_description_table[14]; |
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// [0] machine id
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// [1] machine submodel id
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// [2] BIOS revision
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// [3] bit1: MCA bus
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|
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/* 0x0b0 */ uint8_t pad3[0x1e0 - 0xb0]; |
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/* 0x1e0 */ uint32_t alt_mem_k;
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/* 0x1e4 */ uint8_t pad4[4]; |
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/* 0x1e8 */ uint8_t e820map_entries;
|
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/* 0x1e9 */ uint8_t eddbuf_entries; // EDD_NR |
| 112 |
/* 0x1ea */ uint8_t pad5[0x1f1 - 0x1ea]; |
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/* 0x1f1 */ uint8_t setup_sects; // size of setup.S, number of sectors |
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/* 0x1f2 */ uint16_t mount_root_rdonly; // MOUNT_ROOT_RDONLY (if !=0) |
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/* 0x1f4 */ uint16_t sys_size; // size of compressed kernel-part in the |
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// (b)zImage-file (in 16 byte units, rounded up)
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/* 0x1f6 */ uint16_t swap_dev; // (unused AFAIK) |
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/* 0x1f8 */ uint16_t ramdisk_flags;
|
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/* 0x1fa */ uint16_t vga_mode; // (old one) |
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/* 0x1fc */ uint16_t orig_root_dev; // (high=Major, low=minor) |
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/* 0x1fe */ uint8_t pad6[1]; |
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/* 0x1ff */ uint8_t aux_device_info;
|
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/* 0x200 */ uint16_t jump_setup; // Jump to start of setup code, |
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// aka "reserved" field.
|
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/* 0x202 */ uint8_t setup_signature[4]; // Signature for SETUP-header, ="HdrS" |
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/* 0x206 */ uint16_t header_format_version; // Version number of header format; |
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/* 0x208 */ uint8_t setup_S_temp0[8]; // Used by setup.S for communication with |
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// boot loaders, look there.
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/* 0x210 */ uint8_t loader_type;
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// 0 for old one.
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// else 0xTV:
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// T=0: LILO
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// T=1: Loadlin
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// T=2: bootsect-loader
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// T=3: SYSLINUX
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// T=4: ETHERBOOT
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// V=version
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/* 0x211 */ uint8_t loadflags;
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// bit0 = 1: kernel is loaded high (bzImage)
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// bit7 = 1: Heap and pointer (see below) set by boot
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// loader.
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/* 0x212 */ uint16_t setup_S_temp1;
|
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/* 0x214 */ uint32_t kernel_start;
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/* 0x218 */ uint32_t initrd_start;
|
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/* 0x21c */ uint32_t initrd_size;
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/* 0x220 */ uint8_t setup_S_temp2[4]; |
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/* 0x224 */ uint16_t setup_S_heap_end_pointer;
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/* 0x226 */ uint8_t pad7[0x2d0 - 0x226]; |
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|
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/* 0x2d0 : Int 15, ax=e820 memory map. */
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// (linux/include/asm-i386/e820.h, 'struct e820entry')
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#define E820MAX 32 |
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#define E820_RAM 1 |
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#define E820_RESERVED 2 |
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#define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */ |
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#define E820_NVS 4 |
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struct {
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uint64_t addr; |
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uint64_t size; |
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uint32_t type; |
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} e820map[E820MAX]; |
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|
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/* 0x550 */ uint8_t pad8[0x600 - 0x550]; |
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|
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// BIOS Enhanced Disk Drive Services.
|
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// (From linux/include/asm-i386/edd.h, 'struct edd_info')
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// Each 'struct edd_info is 78 bytes, times a max of 6 structs in array.
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/* 0x600 */ uint8_t eddbuf[0x7d4 - 0x600]; |
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|
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/* 0x7d4 */ uint8_t pad9[0x800 - 0x7d4]; |
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/* 0x800 */ uint8_t commandline[0x800]; |
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|
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/* 0x1000 */
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uint64_t gdt_table[256];
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uint64_t idt_table[48];
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}; |
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|
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#define KERNEL_CS 0x10 |
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#define KERNEL_DS 0x18 |
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|
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typedef void (IOPortWriteFunc)(CPUX86State *env, uint32_t address, uint32_t data); |
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typedef uint32_t (IOPortReadFunc)(CPUX86State *env, uint32_t address);
|
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|
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#define MAX_IOPORTS 4096 |
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|
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char phys_ram_file[1024]; |
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CPUX86State *global_env; |
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CPUX86State *cpu_single_env; |
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FILE *logfile = NULL;
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int loglevel;
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IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS];
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IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS];
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|
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/***********************************************************/
|
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/* x86 io ports */
|
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|
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uint32_t default_ioport_readb(CPUX86State *env, uint32_t address) |
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{
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#ifdef DEBUG_UNUSED_IOPORT
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fprintf(stderr, "inb: port=0x%04x\n", address);
|
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#endif
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return 0xff; |
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} |
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|
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void default_ioport_writeb(CPUX86State *env, uint32_t address, uint32_t data)
|
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{
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#ifdef DEBUG_UNUSED_IOPORT
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fprintf(stderr, "outb: port=0x%04x data=0x%02x\n", address, data);
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#endif
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} |
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|
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/* default is to make two byte accesses */
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uint32_t default_ioport_readw(CPUX86State *env, uint32_t address) |
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{
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uint32_t data; |
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data = ioport_read_table[0][address](env, address);
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data |= ioport_read_table[0][address + 1](env, address + 1) << 8; |
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return data;
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} |
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|
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void default_ioport_writew(CPUX86State *env, uint32_t address, uint32_t data)
|
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{
|
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ioport_write_table[0][address](env, address, data & 0xff); |
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ioport_write_table[0][address + 1](env, address + 1, (data >> 8) & 0xff); |
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} |
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|
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uint32_t default_ioport_readl(CPUX86State *env, uint32_t address) |
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{
|
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#ifdef DEBUG_UNUSED_IOPORT
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fprintf(stderr, "inl: port=0x%04x\n", address);
|
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#endif
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return 0xffffffff; |
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} |
| 234 |
|
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void default_ioport_writel(CPUX86State *env, uint32_t address, uint32_t data)
|
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{
|
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#ifdef DEBUG_UNUSED_IOPORT
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fprintf(stderr, "outl: port=0x%04x data=0x%02x\n", address, data);
|
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#endif
|
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} |
| 241 |
|
| 242 |
void init_ioports(void) |
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{
|
| 244 |
int i;
|
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|
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for(i = 0; i < MAX_IOPORTS; i++) { |
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ioport_read_table[0][i] = default_ioport_readb;
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ioport_write_table[0][i] = default_ioport_writeb;
|
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ioport_read_table[1][i] = default_ioport_readw;
|
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ioport_write_table[1][i] = default_ioport_writew;
|
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ioport_read_table[2][i] = default_ioport_readl;
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ioport_write_table[2][i] = default_ioport_writel;
|
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} |
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} |
| 255 |
|
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/* size is the word size in byte */
|
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int register_ioport_read(int start, int length, IOPortReadFunc *func, int size) |
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{
|
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int i, bsize;
|
| 260 |
|
| 261 |
if (size == 1) |
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bsize = 0;
|
| 263 |
else if (size == 2) |
| 264 |
bsize = 1;
|
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else if (size == 4) |
| 266 |
bsize = 2;
|
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else
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return -1; |
| 269 |
for(i = start; i < start + length; i += size)
|
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ioport_read_table[bsize][i] = func; |
| 271 |
return 0; |
| 272 |
} |
| 273 |
|
| 274 |
/* size is the word size in byte */
|
| 275 |
int register_ioport_write(int start, int length, IOPortWriteFunc *func, int size) |
| 276 |
{
|
| 277 |
int i, bsize;
|
| 278 |
|
| 279 |
if (size == 1) |
| 280 |
bsize = 0;
|
| 281 |
else if (size == 2) |
| 282 |
bsize = 1;
|
| 283 |
else if (size == 4) |
| 284 |
bsize = 2;
|
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else
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return -1; |
| 287 |
for(i = start; i < start + length; i += size)
|
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ioport_write_table[bsize][i] = func; |
| 289 |
return 0; |
| 290 |
} |
| 291 |
|
| 292 |
void pstrcpy(char *buf, int buf_size, const char *str) |
| 293 |
{
|
| 294 |
int c;
|
| 295 |
char *q = buf;
|
| 296 |
|
| 297 |
if (buf_size <= 0) |
| 298 |
return;
|
| 299 |
|
| 300 |
for(;;) {
|
| 301 |
c = *str++; |
| 302 |
if (c == 0 || q >= buf + buf_size - 1) |
| 303 |
break;
|
| 304 |
*q++ = c; |
| 305 |
} |
| 306 |
*q = '\0';
|
| 307 |
} |
| 308 |
|
| 309 |
/* strcat and truncate. */
|
| 310 |
char *pstrcat(char *buf, int buf_size, const char *s) |
| 311 |
{
|
| 312 |
int len;
|
| 313 |
len = strlen(buf); |
| 314 |
if (len < buf_size)
|
| 315 |
pstrcpy(buf + len, buf_size - len, s); |
| 316 |
return buf;
|
| 317 |
} |
| 318 |
|
| 319 |
int load_kernel(const char *filename, uint8_t *addr) |
| 320 |
{
|
| 321 |
int fd, size, setup_sects;
|
| 322 |
uint8_t bootsect[512];
|
| 323 |
|
| 324 |
fd = open(filename, O_RDONLY); |
| 325 |
if (fd < 0) |
| 326 |
return -1; |
| 327 |
if (read(fd, bootsect, 512) != 512) |
| 328 |
goto fail;
|
| 329 |
setup_sects = bootsect[0x1F1];
|
| 330 |
if (!setup_sects)
|
| 331 |
setup_sects = 4;
|
| 332 |
/* skip 16 bit setup code */
|
| 333 |
lseek(fd, (setup_sects + 1) * 512, SEEK_SET); |
| 334 |
size = read(fd, addr, 16 * 1024 * 1024); |
| 335 |
if (size < 0) |
| 336 |
goto fail;
|
| 337 |
close(fd); |
| 338 |
return size;
|
| 339 |
fail:
|
| 340 |
close(fd); |
| 341 |
return -1; |
| 342 |
} |
| 343 |
|
| 344 |
/* return the size or -1 if error */
|
| 345 |
int load_image(const char *filename, uint8_t *addr) |
| 346 |
{
|
| 347 |
int fd, size;
|
| 348 |
fd = open(filename, O_RDONLY); |
| 349 |
if (fd < 0) |
| 350 |
return -1; |
| 351 |
size = lseek(fd, 0, SEEK_END);
|
| 352 |
lseek(fd, 0, SEEK_SET);
|
| 353 |
if (read(fd, addr, size) != size) {
|
| 354 |
close(fd); |
| 355 |
return -1; |
| 356 |
} |
| 357 |
close(fd); |
| 358 |
return size;
|
| 359 |
} |
| 360 |
|
| 361 |
void cpu_x86_outb(CPUX86State *env, int addr, int val) |
| 362 |
{
|
| 363 |
ioport_write_table[0][addr & (MAX_IOPORTS - 1)](env, addr, val); |
| 364 |
} |
| 365 |
|
| 366 |
void cpu_x86_outw(CPUX86State *env, int addr, int val) |
| 367 |
{
|
| 368 |
ioport_write_table[1][addr & (MAX_IOPORTS - 1)](env, addr, val); |
| 369 |
} |
| 370 |
|
| 371 |
void cpu_x86_outl(CPUX86State *env, int addr, int val) |
| 372 |
{
|
| 373 |
ioport_write_table[2][addr & (MAX_IOPORTS - 1)](env, addr, val); |
| 374 |
} |
| 375 |
|
| 376 |
int cpu_x86_inb(CPUX86State *env, int addr) |
| 377 |
{
|
| 378 |
return ioport_read_table[0][addr & (MAX_IOPORTS - 1)](env, addr); |
| 379 |
} |
| 380 |
|
| 381 |
int cpu_x86_inw(CPUX86State *env, int addr) |
| 382 |
{
|
| 383 |
return ioport_read_table[1][addr & (MAX_IOPORTS - 1)](env, addr); |
| 384 |
} |
| 385 |
|
| 386 |
int cpu_x86_inl(CPUX86State *env, int addr) |
| 387 |
{
|
| 388 |
return ioport_read_table[2][addr & (MAX_IOPORTS - 1)](env, addr); |
| 389 |
} |
| 390 |
|
| 391 |
/***********************************************************/
|
| 392 |
void ioport80_write(CPUX86State *env, uint32_t addr, uint32_t data)
|
| 393 |
{
|
| 394 |
} |
| 395 |
|
| 396 |
void hw_error(const char *fmt, ...) |
| 397 |
{
|
| 398 |
va_list ap; |
| 399 |
|
| 400 |
va_start(ap, fmt); |
| 401 |
fprintf(stderr, "qemu: hardware error: ");
|
| 402 |
vfprintf(stderr, fmt, ap); |
| 403 |
fprintf(stderr, "\n");
|
| 404 |
#ifdef TARGET_I386
|
| 405 |
cpu_x86_dump_state(global_env, stderr, X86_DUMP_FPU | X86_DUMP_CCOP); |
| 406 |
#endif
|
| 407 |
va_end(ap); |
| 408 |
abort(); |
| 409 |
} |
| 410 |
|
| 411 |
/***********************************************************/
|
| 412 |
/* vga emulation */
|
| 413 |
static uint8_t vga_index;
|
| 414 |
static uint8_t vga_regs[256]; |
| 415 |
static int last_cursor_pos; |
| 416 |
|
| 417 |
void update_console_messages(void) |
| 418 |
{
|
| 419 |
int c, i, cursor_pos, eol;
|
| 420 |
|
| 421 |
cursor_pos = vga_regs[0x0f] | (vga_regs[0x0e] << 8); |
| 422 |
eol = 0;
|
| 423 |
for(i = last_cursor_pos; i < cursor_pos; i++) {
|
| 424 |
c = phys_ram_base[0xb8000 + (i) * 2]; |
| 425 |
if (c >= ' ') { |
| 426 |
putchar(c); |
| 427 |
eol = 0;
|
| 428 |
} else {
|
| 429 |
if (!eol)
|
| 430 |
putchar('\n');
|
| 431 |
eol = 1;
|
| 432 |
} |
| 433 |
} |
| 434 |
fflush(stdout); |
| 435 |
last_cursor_pos = cursor_pos; |
| 436 |
} |
| 437 |
|
| 438 |
/* just to see first Linux console messages, we intercept cursor position */
|
| 439 |
void vga_ioport_write(CPUX86State *env, uint32_t addr, uint32_t data)
|
| 440 |
{
|
| 441 |
switch(addr) {
|
| 442 |
case 0x3d4: |
| 443 |
vga_index = data; |
| 444 |
break;
|
| 445 |
case 0x3d5: |
| 446 |
vga_regs[vga_index] = data; |
| 447 |
if (vga_index == 0x0f) |
| 448 |
update_console_messages(); |
| 449 |
break;
|
| 450 |
} |
| 451 |
|
| 452 |
} |
| 453 |
|
| 454 |
/***********************************************************/
|
| 455 |
/* cmos emulation */
|
| 456 |
|
| 457 |
#define RTC_SECONDS 0 |
| 458 |
#define RTC_SECONDS_ALARM 1 |
| 459 |
#define RTC_MINUTES 2 |
| 460 |
#define RTC_MINUTES_ALARM 3 |
| 461 |
#define RTC_HOURS 4 |
| 462 |
#define RTC_HOURS_ALARM 5 |
| 463 |
#define RTC_ALARM_DONT_CARE 0xC0 |
| 464 |
|
| 465 |
#define RTC_DAY_OF_WEEK 6 |
| 466 |
#define RTC_DAY_OF_MONTH 7 |
| 467 |
#define RTC_MONTH 8 |
| 468 |
#define RTC_YEAR 9 |
| 469 |
|
| 470 |
#define RTC_REG_A 10 |
| 471 |
#define RTC_REG_B 11 |
| 472 |
#define RTC_REG_C 12 |
| 473 |
#define RTC_REG_D 13 |
| 474 |
|
| 475 |
/* PC cmos mappings */
|
| 476 |
#define REG_EQUIPMENT_BYTE 0x14 |
| 477 |
|
| 478 |
uint8_t cmos_data[128];
|
| 479 |
uint8_t cmos_index; |
| 480 |
|
| 481 |
void cmos_ioport_write(CPUX86State *env, uint32_t addr, uint32_t data)
|
| 482 |
{
|
| 483 |
if (addr == 0x70) { |
| 484 |
cmos_index = data & 0x7f;
|
| 485 |
} |
| 486 |
} |
| 487 |
|
| 488 |
uint32_t cmos_ioport_read(CPUX86State *env, uint32_t addr) |
| 489 |
{
|
| 490 |
int ret;
|
| 491 |
|
| 492 |
if (addr == 0x70) { |
| 493 |
return 0xff; |
| 494 |
} else {
|
| 495 |
/* toggle update-in-progress bit for Linux (same hack as
|
| 496 |
plex86) */
|
| 497 |
ret = cmos_data[cmos_index]; |
| 498 |
if (cmos_index == RTC_REG_A)
|
| 499 |
cmos_data[RTC_REG_A] ^= 0x80;
|
| 500 |
else if (cmos_index == RTC_REG_C) |
| 501 |
cmos_data[RTC_REG_C] = 0x00;
|
| 502 |
return ret;
|
| 503 |
} |
| 504 |
} |
| 505 |
|
| 506 |
|
| 507 |
static inline int to_bcd(int a) |
| 508 |
{
|
| 509 |
return ((a / 10) << 4) | (a % 10); |
| 510 |
} |
| 511 |
|
| 512 |
void cmos_init(void) |
| 513 |
{
|
| 514 |
struct tm *tm;
|
| 515 |
time_t ti; |
| 516 |
|
| 517 |
ti = time(NULL);
|
| 518 |
tm = gmtime(&ti); |
| 519 |
cmos_data[RTC_SECONDS] = to_bcd(tm->tm_sec); |
| 520 |
cmos_data[RTC_MINUTES] = to_bcd(tm->tm_min); |
| 521 |
cmos_data[RTC_HOURS] = to_bcd(tm->tm_hour); |
| 522 |
cmos_data[RTC_DAY_OF_WEEK] = to_bcd(tm->tm_wday); |
| 523 |
cmos_data[RTC_DAY_OF_MONTH] = to_bcd(tm->tm_mday); |
| 524 |
cmos_data[RTC_MONTH] = to_bcd(tm->tm_mon + 1);
|
| 525 |
cmos_data[RTC_YEAR] = to_bcd(tm->tm_year % 100);
|
| 526 |
|
| 527 |
cmos_data[RTC_REG_A] = 0x26;
|
| 528 |
cmos_data[RTC_REG_B] = 0x02;
|
| 529 |
cmos_data[RTC_REG_C] = 0x00;
|
| 530 |
cmos_data[RTC_REG_D] = 0x80;
|
| 531 |
|
| 532 |
cmos_data[REG_EQUIPMENT_BYTE] = 0x02; /* FPU is there */ |
| 533 |
|
| 534 |
register_ioport_write(0x70, 2, cmos_ioport_write, 1); |
| 535 |
register_ioport_read(0x70, 2, cmos_ioport_read, 1); |
| 536 |
} |
| 537 |
|
| 538 |
/***********************************************************/
|
| 539 |
/* 8259 pic emulation */
|
| 540 |
|
| 541 |
//#define DEBUG_PIC
|
| 542 |
|
| 543 |
typedef struct PicState { |
| 544 |
uint8_t last_irr; /* edge detection */
|
| 545 |
uint8_t irr; /* interrupt request register */
|
| 546 |
uint8_t imr; /* interrupt mask register */
|
| 547 |
uint8_t isr; /* interrupt service register */
|
| 548 |
uint8_t priority_add; /* used to compute irq priority */
|
| 549 |
uint8_t irq_base; |
| 550 |
uint8_t read_reg_select; |
| 551 |
uint8_t special_mask; |
| 552 |
uint8_t init_state; |
| 553 |
uint8_t auto_eoi; |
| 554 |
uint8_t rotate_on_autoeoi; |
| 555 |
uint8_t init4; /* true if 4 byte init */
|
| 556 |
} PicState; |
| 557 |
|
| 558 |
/* 0 is master pic, 1 is slave pic */
|
| 559 |
PicState pics[2];
|
| 560 |
int pic_irq_requested;
|
| 561 |
|
| 562 |
/* set irq level. If an edge is detected, then the IRR is set to 1 */
|
| 563 |
static inline void pic_set_irq1(PicState *s, int irq, int level) |
| 564 |
{
|
| 565 |
int mask;
|
| 566 |
mask = 1 << irq;
|
| 567 |
if (level) {
|
| 568 |
if ((s->last_irr & mask) == 0) |
| 569 |
s->irr |= mask; |
| 570 |
s->last_irr |= mask; |
| 571 |
} else {
|
| 572 |
s->last_irr &= ~mask; |
| 573 |
} |
| 574 |
} |
| 575 |
|
| 576 |
static inline int get_priority(PicState *s, int mask) |
| 577 |
{
|
| 578 |
int priority;
|
| 579 |
if (mask == 0) |
| 580 |
return -1; |
| 581 |
priority = 7;
|
| 582 |
while ((mask & (1 << ((priority + s->priority_add) & 7))) == 0) |
| 583 |
priority--; |
| 584 |
return priority;
|
| 585 |
} |
| 586 |
|
| 587 |
/* return the pic wanted interrupt. return -1 if none */
|
| 588 |
static int pic_get_irq(PicState *s) |
| 589 |
{
|
| 590 |
int mask, cur_priority, priority;
|
| 591 |
|
| 592 |
mask = s->irr & ~s->imr; |
| 593 |
priority = get_priority(s, mask); |
| 594 |
if (priority < 0) |
| 595 |
return -1; |
| 596 |
/* compute current priority */
|
| 597 |
cur_priority = get_priority(s, s->isr); |
| 598 |
if (priority > cur_priority) {
|
| 599 |
/* higher priority found: an irq should be generated */
|
| 600 |
return priority;
|
| 601 |
} else {
|
| 602 |
return -1; |
| 603 |
} |
| 604 |
} |
| 605 |
|
| 606 |
/* raise irq to CPU if necessary. must be called every time the active
|
| 607 |
irq may change */
|
| 608 |
static void pic_update_irq(void) |
| 609 |
{
|
| 610 |
int irq2, irq;
|
| 611 |
|
| 612 |
/* first look at slave pic */
|
| 613 |
irq2 = pic_get_irq(&pics[1]);
|
| 614 |
if (irq2 >= 0) { |
| 615 |
/* if irq request by slave pic, signal master PIC */
|
| 616 |
pic_set_irq1(&pics[0], 2, 1); |
| 617 |
pic_set_irq1(&pics[0], 2, 0); |
| 618 |
} |
| 619 |
/* look at requested irq */
|
| 620 |
irq = pic_get_irq(&pics[0]);
|
| 621 |
if (irq >= 0) { |
| 622 |
if (irq == 2) { |
| 623 |
/* from slave pic */
|
| 624 |
pic_irq_requested = 8 + irq2;
|
| 625 |
} else {
|
| 626 |
/* from master pic */
|
| 627 |
pic_irq_requested = irq; |
| 628 |
} |
| 629 |
cpu_x86_interrupt(global_env, CPU_INTERRUPT_HARD); |
| 630 |
} |
| 631 |
} |
| 632 |
|
| 633 |
#ifdef DEBUG_IRQ_LATENCY
|
| 634 |
int64_t irq_time[16];
|
| 635 |
int64_t cpu_get_ticks(void);
|
| 636 |
#endif
|
| 637 |
#ifdef DEBUG_PIC
|
| 638 |
int irq_level[16]; |
| 639 |
#endif
|
| 640 |
|
| 641 |
void pic_set_irq(int irq, int level) |
| 642 |
{
|
| 643 |
#ifdef DEBUG_PIC
|
| 644 |
if (level != irq_level[irq]) {
|
| 645 |
printf("pic_set_irq: irq=%d level=%d\n", irq, level);
|
| 646 |
irq_level[irq] = level; |
| 647 |
} |
| 648 |
#endif
|
| 649 |
#ifdef DEBUG_IRQ_LATENCY
|
| 650 |
if (level) {
|
| 651 |
irq_time[irq] = cpu_get_ticks(); |
| 652 |
} |
| 653 |
#endif
|
| 654 |
pic_set_irq1(&pics[irq >> 3], irq & 7, level); |
| 655 |
pic_update_irq(); |
| 656 |
} |
| 657 |
|
| 658 |
int cpu_x86_get_pic_interrupt(CPUX86State *env)
|
| 659 |
{
|
| 660 |
int irq, irq2, intno;
|
| 661 |
|
| 662 |
/* signal the pic that the irq was acked by the CPU */
|
| 663 |
irq = pic_irq_requested; |
| 664 |
#ifdef DEBUG_IRQ_LATENCY
|
| 665 |
printf("IRQ%d latency=%Ld\n", irq, cpu_get_ticks() - irq_time[irq]);
|
| 666 |
#endif
|
| 667 |
#ifdef DEBUG_PIC
|
| 668 |
printf("pic_interrupt: irq=%d\n", irq);
|
| 669 |
#endif
|
| 670 |
|
| 671 |
if (irq >= 8) { |
| 672 |
irq2 = irq & 7;
|
| 673 |
pics[1].isr |= (1 << irq2); |
| 674 |
pics[1].irr &= ~(1 << irq2); |
| 675 |
irq = 2;
|
| 676 |
intno = pics[1].irq_base + irq2;
|
| 677 |
} else {
|
| 678 |
intno = pics[0].irq_base + irq;
|
| 679 |
} |
| 680 |
pics[0].isr |= (1 << irq); |
| 681 |
pics[0].irr &= ~(1 << irq); |
| 682 |
return intno;
|
| 683 |
} |
| 684 |
|
| 685 |
void pic_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 686 |
{
|
| 687 |
PicState *s; |
| 688 |
int priority;
|
| 689 |
|
| 690 |
#ifdef DEBUG_PIC
|
| 691 |
printf("pic_write: addr=0x%02x val=0x%02x\n", addr, val);
|
| 692 |
#endif
|
| 693 |
s = &pics[addr >> 7];
|
| 694 |
addr &= 1;
|
| 695 |
if (addr == 0) { |
| 696 |
if (val & 0x10) { |
| 697 |
/* init */
|
| 698 |
memset(s, 0, sizeof(PicState)); |
| 699 |
s->init_state = 1;
|
| 700 |
s->init4 = val & 1;
|
| 701 |
if (val & 0x02) |
| 702 |
hw_error("single mode not supported");
|
| 703 |
if (val & 0x08) |
| 704 |
hw_error("level sensitive irq not supported");
|
| 705 |
} else if (val & 0x08) { |
| 706 |
if (val & 0x02) |
| 707 |
s->read_reg_select = val & 1;
|
| 708 |
if (val & 0x40) |
| 709 |
s->special_mask = (val >> 5) & 1; |
| 710 |
} else {
|
| 711 |
switch(val) {
|
| 712 |
case 0x00: |
| 713 |
case 0x80: |
| 714 |
s->rotate_on_autoeoi = val >> 7;
|
| 715 |
break;
|
| 716 |
case 0x20: /* end of interrupt */ |
| 717 |
case 0xa0: |
| 718 |
priority = get_priority(s, s->isr); |
| 719 |
if (priority >= 0) { |
| 720 |
s->isr &= ~(1 << ((priority + s->priority_add) & 7)); |
| 721 |
} |
| 722 |
if (val == 0xa0) |
| 723 |
s->priority_add = (s->priority_add + 1) & 7; |
| 724 |
break;
|
| 725 |
case 0x60 ... 0x67: |
| 726 |
priority = val & 7;
|
| 727 |
s->isr &= ~(1 << priority);
|
| 728 |
break;
|
| 729 |
case 0xc0 ... 0xc7: |
| 730 |
s->priority_add = (val + 1) & 7; |
| 731 |
break;
|
| 732 |
case 0xe0 ... 0xe7: |
| 733 |
priority = val & 7;
|
| 734 |
s->isr &= ~(1 << priority);
|
| 735 |
s->priority_add = (priority + 1) & 7; |
| 736 |
break;
|
| 737 |
} |
| 738 |
} |
| 739 |
} else {
|
| 740 |
switch(s->init_state) {
|
| 741 |
case 0: |
| 742 |
/* normal mode */
|
| 743 |
s->imr = val; |
| 744 |
pic_update_irq(); |
| 745 |
break;
|
| 746 |
case 1: |
| 747 |
s->irq_base = val & 0xf8;
|
| 748 |
s->init_state = 2;
|
| 749 |
break;
|
| 750 |
case 2: |
| 751 |
if (s->init4) {
|
| 752 |
s->init_state = 3;
|
| 753 |
} else {
|
| 754 |
s->init_state = 0;
|
| 755 |
} |
| 756 |
break;
|
| 757 |
case 3: |
| 758 |
s->auto_eoi = (val >> 1) & 1; |
| 759 |
s->init_state = 0;
|
| 760 |
break;
|
| 761 |
} |
| 762 |
} |
| 763 |
} |
| 764 |
|
| 765 |
uint32_t pic_ioport_read(CPUX86State *env, uint32_t addr1) |
| 766 |
{
|
| 767 |
PicState *s; |
| 768 |
unsigned int addr; |
| 769 |
int ret;
|
| 770 |
|
| 771 |
addr = addr1; |
| 772 |
s = &pics[addr >> 7];
|
| 773 |
addr &= 1;
|
| 774 |
if (addr == 0) { |
| 775 |
if (s->read_reg_select)
|
| 776 |
ret = s->isr; |
| 777 |
else
|
| 778 |
ret = s->irr; |
| 779 |
} else {
|
| 780 |
ret = s->imr; |
| 781 |
} |
| 782 |
#ifdef DEBUG_PIC
|
| 783 |
printf("pic_read: addr=0x%02x val=0x%02x\n", addr1, ret);
|
| 784 |
#endif
|
| 785 |
return ret;
|
| 786 |
} |
| 787 |
|
| 788 |
void pic_init(void) |
| 789 |
{
|
| 790 |
register_ioport_write(0x20, 2, pic_ioport_write, 1); |
| 791 |
register_ioport_read(0x20, 2, pic_ioport_read, 1); |
| 792 |
register_ioport_write(0xa0, 2, pic_ioport_write, 1); |
| 793 |
register_ioport_read(0xa0, 2, pic_ioport_read, 1); |
| 794 |
} |
| 795 |
|
| 796 |
/***********************************************************/
|
| 797 |
/* 8253 PIT emulation */
|
| 798 |
|
| 799 |
#define PIT_FREQ 1193182 |
| 800 |
|
| 801 |
#define RW_STATE_LSB 0 |
| 802 |
#define RW_STATE_MSB 1 |
| 803 |
#define RW_STATE_WORD0 2 |
| 804 |
#define RW_STATE_WORD1 3 |
| 805 |
#define RW_STATE_LATCHED_WORD0 4 |
| 806 |
#define RW_STATE_LATCHED_WORD1 5 |
| 807 |
|
| 808 |
typedef struct PITChannelState { |
| 809 |
int count; /* can be 65536 */ |
| 810 |
uint16_t latched_count; |
| 811 |
uint8_t rw_state; |
| 812 |
uint8_t mode; |
| 813 |
uint8_t bcd; /* not supported */
|
| 814 |
uint8_t gate; /* timer start */
|
| 815 |
int64_t count_load_time; |
| 816 |
int64_t count_last_edge_check_time; |
| 817 |
} PITChannelState; |
| 818 |
|
| 819 |
PITChannelState pit_channels[3];
|
| 820 |
int speaker_data_on;
|
| 821 |
int pit_min_timer_count = 0; |
| 822 |
|
| 823 |
int64_t ticks_per_sec; |
| 824 |
|
| 825 |
int64_t get_clock(void)
|
| 826 |
{
|
| 827 |
struct timeval tv;
|
| 828 |
gettimeofday(&tv, NULL);
|
| 829 |
return tv.tv_sec * 1000000LL + tv.tv_usec; |
| 830 |
} |
| 831 |
|
| 832 |
int64_t cpu_get_ticks(void)
|
| 833 |
{
|
| 834 |
int64_t val; |
| 835 |
asm("rdtsc" : "=A" (val)); |
| 836 |
return val;
|
| 837 |
} |
| 838 |
|
| 839 |
void cpu_calibrate_ticks(void) |
| 840 |
{
|
| 841 |
int64_t usec, ticks; |
| 842 |
|
| 843 |
usec = get_clock(); |
| 844 |
ticks = cpu_get_ticks(); |
| 845 |
usleep(50 * 1000); |
| 846 |
usec = get_clock() - usec; |
| 847 |
ticks = cpu_get_ticks() - ticks; |
| 848 |
ticks_per_sec = (ticks * 1000000LL + (usec >> 1)) / usec; |
| 849 |
} |
| 850 |
|
| 851 |
/* compute with 96 bit intermediate result: (a*b)/c */
|
| 852 |
static uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
|
| 853 |
{
|
| 854 |
union {
|
| 855 |
uint64_t ll; |
| 856 |
struct {
|
| 857 |
#ifdef WORDS_BIGENDIAN
|
| 858 |
uint32_t high, low; |
| 859 |
#else
|
| 860 |
uint32_t low, high; |
| 861 |
#endif
|
| 862 |
} l; |
| 863 |
} u, res; |
| 864 |
uint64_t rl, rh; |
| 865 |
|
| 866 |
u.ll = a; |
| 867 |
rl = (uint64_t)u.l.low * (uint64_t)b; |
| 868 |
rh = (uint64_t)u.l.high * (uint64_t)b; |
| 869 |
rh += (rl >> 32);
|
| 870 |
res.l.high = rh / c; |
| 871 |
res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c; |
| 872 |
return res.ll;
|
| 873 |
} |
| 874 |
|
| 875 |
static int pit_get_count(PITChannelState *s) |
| 876 |
{
|
| 877 |
uint64_t d; |
| 878 |
int counter;
|
| 879 |
|
| 880 |
d = muldiv64(cpu_get_ticks() - s->count_load_time, PIT_FREQ, ticks_per_sec); |
| 881 |
switch(s->mode) {
|
| 882 |
case 0: |
| 883 |
case 1: |
| 884 |
case 4: |
| 885 |
case 5: |
| 886 |
counter = (s->count - d) & 0xffff;
|
| 887 |
break;
|
| 888 |
default:
|
| 889 |
counter = s->count - (d % s->count); |
| 890 |
break;
|
| 891 |
} |
| 892 |
return counter;
|
| 893 |
} |
| 894 |
|
| 895 |
/* get pit output bit */
|
| 896 |
static int pit_get_out(PITChannelState *s) |
| 897 |
{
|
| 898 |
uint64_t d; |
| 899 |
int out;
|
| 900 |
|
| 901 |
d = muldiv64(cpu_get_ticks() - s->count_load_time, PIT_FREQ, ticks_per_sec); |
| 902 |
switch(s->mode) {
|
| 903 |
default:
|
| 904 |
case 0: |
| 905 |
out = (d >= s->count); |
| 906 |
break;
|
| 907 |
case 1: |
| 908 |
out = (d < s->count); |
| 909 |
break;
|
| 910 |
case 2: |
| 911 |
if ((d % s->count) == 0 && d != 0) |
| 912 |
out = 1;
|
| 913 |
else
|
| 914 |
out = 0;
|
| 915 |
break;
|
| 916 |
case 3: |
| 917 |
out = (d % s->count) < (s->count >> 1);
|
| 918 |
break;
|
| 919 |
case 4: |
| 920 |
case 5: |
| 921 |
out = (d == s->count); |
| 922 |
break;
|
| 923 |
} |
| 924 |
return out;
|
| 925 |
} |
| 926 |
|
| 927 |
/* get the number of 0 to 1 transitions we had since we call this
|
| 928 |
function */
|
| 929 |
/* XXX: maybe better to use ticks precision to avoid getting edges
|
| 930 |
twice if checks are done at very small intervals */
|
| 931 |
static int pit_get_out_edges(PITChannelState *s) |
| 932 |
{
|
| 933 |
uint64_t d1, d2; |
| 934 |
int64_t ticks; |
| 935 |
int ret, v;
|
| 936 |
|
| 937 |
ticks = cpu_get_ticks(); |
| 938 |
d1 = muldiv64(s->count_last_edge_check_time - s->count_load_time, |
| 939 |
PIT_FREQ, ticks_per_sec); |
| 940 |
d2 = muldiv64(ticks - s->count_load_time, |
| 941 |
PIT_FREQ, ticks_per_sec); |
| 942 |
s->count_last_edge_check_time = ticks; |
| 943 |
switch(s->mode) {
|
| 944 |
default:
|
| 945 |
case 0: |
| 946 |
if (d1 < s->count && d2 >= s->count)
|
| 947 |
ret = 1;
|
| 948 |
else
|
| 949 |
ret = 0;
|
| 950 |
break;
|
| 951 |
case 1: |
| 952 |
ret = 0;
|
| 953 |
break;
|
| 954 |
case 2: |
| 955 |
d1 /= s->count; |
| 956 |
d2 /= s->count; |
| 957 |
ret = d2 - d1; |
| 958 |
break;
|
| 959 |
case 3: |
| 960 |
v = s->count - (s->count >> 1);
|
| 961 |
d1 = (d1 + v) / s->count; |
| 962 |
d2 = (d2 + v) / s->count; |
| 963 |
ret = d2 - d1; |
| 964 |
break;
|
| 965 |
case 4: |
| 966 |
case 5: |
| 967 |
if (d1 < s->count && d2 >= s->count)
|
| 968 |
ret = 1;
|
| 969 |
else
|
| 970 |
ret = 0;
|
| 971 |
break;
|
| 972 |
} |
| 973 |
return ret;
|
| 974 |
} |
| 975 |
|
| 976 |
static inline void pit_load_count(PITChannelState *s, int val) |
| 977 |
{
|
| 978 |
if (val == 0) |
| 979 |
val = 0x10000;
|
| 980 |
s->count_load_time = cpu_get_ticks(); |
| 981 |
s->count_last_edge_check_time = s->count_load_time; |
| 982 |
s->count = val; |
| 983 |
if (s == &pit_channels[0] && val <= pit_min_timer_count) { |
| 984 |
fprintf(stderr, |
| 985 |
"\nWARNING: vl: on your system, accurate timer emulation is impossible if its frequency is more than %d Hz. If using a 2.5.xx Linux kernel, you must patch asm/param.h to change HZ from 1000 to 100.\n\n",
|
| 986 |
PIT_FREQ / pit_min_timer_count); |
| 987 |
} |
| 988 |
} |
| 989 |
|
| 990 |
void pit_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 991 |
{
|
| 992 |
int channel, access;
|
| 993 |
PITChannelState *s; |
| 994 |
|
| 995 |
addr &= 3;
|
| 996 |
if (addr == 3) { |
| 997 |
channel = val >> 6;
|
| 998 |
if (channel == 3) |
| 999 |
return;
|
| 1000 |
s = &pit_channels[channel]; |
| 1001 |
access = (val >> 4) & 3; |
| 1002 |
switch(access) {
|
| 1003 |
case 0: |
| 1004 |
s->latched_count = pit_get_count(s); |
| 1005 |
s->rw_state = RW_STATE_LATCHED_WORD0; |
| 1006 |
break;
|
| 1007 |
default:
|
| 1008 |
s->mode = (val >> 1) & 7; |
| 1009 |
s->bcd = val & 1;
|
| 1010 |
s->rw_state = access - 1 + RW_STATE_LSB;
|
| 1011 |
break;
|
| 1012 |
} |
| 1013 |
} else {
|
| 1014 |
s = &pit_channels[addr]; |
| 1015 |
switch(s->rw_state) {
|
| 1016 |
case RW_STATE_LSB:
|
| 1017 |
pit_load_count(s, val); |
| 1018 |
break;
|
| 1019 |
case RW_STATE_MSB:
|
| 1020 |
pit_load_count(s, val << 8);
|
| 1021 |
break;
|
| 1022 |
case RW_STATE_WORD0:
|
| 1023 |
case RW_STATE_WORD1:
|
| 1024 |
if (s->rw_state & 1) { |
| 1025 |
pit_load_count(s, (s->latched_count & 0xff) | (val << 8)); |
| 1026 |
} else {
|
| 1027 |
s->latched_count = val; |
| 1028 |
} |
| 1029 |
s->rw_state ^= 1;
|
| 1030 |
break;
|
| 1031 |
} |
| 1032 |
} |
| 1033 |
} |
| 1034 |
|
| 1035 |
uint32_t pit_ioport_read(CPUX86State *env, uint32_t addr) |
| 1036 |
{
|
| 1037 |
int ret, count;
|
| 1038 |
PITChannelState *s; |
| 1039 |
|
| 1040 |
addr &= 3;
|
| 1041 |
s = &pit_channels[addr]; |
| 1042 |
switch(s->rw_state) {
|
| 1043 |
case RW_STATE_LSB:
|
| 1044 |
case RW_STATE_MSB:
|
| 1045 |
case RW_STATE_WORD0:
|
| 1046 |
case RW_STATE_WORD1:
|
| 1047 |
count = pit_get_count(s); |
| 1048 |
if (s->rw_state & 1) |
| 1049 |
ret = (count >> 8) & 0xff; |
| 1050 |
else
|
| 1051 |
ret = count & 0xff;
|
| 1052 |
if (s->rw_state & 2) |
| 1053 |
s->rw_state ^= 1;
|
| 1054 |
break;
|
| 1055 |
default:
|
| 1056 |
case RW_STATE_LATCHED_WORD0:
|
| 1057 |
case RW_STATE_LATCHED_WORD1:
|
| 1058 |
if (s->rw_state & 1) |
| 1059 |
ret = s->latched_count >> 8;
|
| 1060 |
else
|
| 1061 |
ret = s->latched_count & 0xff;
|
| 1062 |
s->rw_state ^= 1;
|
| 1063 |
break;
|
| 1064 |
} |
| 1065 |
return ret;
|
| 1066 |
} |
| 1067 |
|
| 1068 |
void speaker_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 1069 |
{
|
| 1070 |
speaker_data_on = (val >> 1) & 1; |
| 1071 |
pit_channels[2].gate = val & 1; |
| 1072 |
} |
| 1073 |
|
| 1074 |
uint32_t speaker_ioport_read(CPUX86State *env, uint32_t addr) |
| 1075 |
{
|
| 1076 |
int out;
|
| 1077 |
out = pit_get_out(&pit_channels[2]);
|
| 1078 |
return (speaker_data_on << 1) | pit_channels[2].gate | (out << 5); |
| 1079 |
} |
| 1080 |
|
| 1081 |
void pit_init(void) |
| 1082 |
{
|
| 1083 |
PITChannelState *s; |
| 1084 |
int i;
|
| 1085 |
|
| 1086 |
cpu_calibrate_ticks(); |
| 1087 |
|
| 1088 |
for(i = 0;i < 3; i++) { |
| 1089 |
s = &pit_channels[i]; |
| 1090 |
s->mode = 3;
|
| 1091 |
s->gate = (i != 2);
|
| 1092 |
pit_load_count(s, 0);
|
| 1093 |
} |
| 1094 |
|
| 1095 |
register_ioport_write(0x40, 4, pit_ioport_write, 1); |
| 1096 |
register_ioport_read(0x40, 3, pit_ioport_read, 1); |
| 1097 |
|
| 1098 |
register_ioport_read(0x61, 1, speaker_ioport_read, 1); |
| 1099 |
register_ioport_write(0x61, 1, speaker_ioport_write, 1); |
| 1100 |
} |
| 1101 |
|
| 1102 |
/***********************************************************/
|
| 1103 |
/* serial port emulation */
|
| 1104 |
|
| 1105 |
#define UART_IRQ 4 |
| 1106 |
|
| 1107 |
#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */ |
| 1108 |
|
| 1109 |
#define UART_IER_MSI 0x08 /* Enable Modem status interrupt */ |
| 1110 |
#define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */ |
| 1111 |
#define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */ |
| 1112 |
#define UART_IER_RDI 0x01 /* Enable receiver data interrupt */ |
| 1113 |
|
| 1114 |
#define UART_IIR_NO_INT 0x01 /* No interrupts pending */ |
| 1115 |
#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */ |
| 1116 |
|
| 1117 |
#define UART_IIR_MSI 0x00 /* Modem status interrupt */ |
| 1118 |
#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */ |
| 1119 |
#define UART_IIR_RDI 0x04 /* Receiver data interrupt */ |
| 1120 |
#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */ |
| 1121 |
|
| 1122 |
#define UART_LSR_TEMT 0x40 /* Transmitter empty */ |
| 1123 |
#define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */ |
| 1124 |
#define UART_LSR_BI 0x10 /* Break interrupt indicator */ |
| 1125 |
#define UART_LSR_FE 0x08 /* Frame error indicator */ |
| 1126 |
#define UART_LSR_PE 0x04 /* Parity error indicator */ |
| 1127 |
#define UART_LSR_OE 0x02 /* Overrun error indicator */ |
| 1128 |
#define UART_LSR_DR 0x01 /* Receiver data ready */ |
| 1129 |
|
| 1130 |
typedef struct SerialState { |
| 1131 |
uint8_t divider; |
| 1132 |
uint8_t rbr; /* receive register */
|
| 1133 |
uint8_t ier; |
| 1134 |
uint8_t iir; /* read only */
|
| 1135 |
uint8_t lcr; |
| 1136 |
uint8_t mcr; |
| 1137 |
uint8_t lsr; /* read only */
|
| 1138 |
uint8_t msr; |
| 1139 |
uint8_t scr; |
| 1140 |
} SerialState; |
| 1141 |
|
| 1142 |
SerialState serial_ports[1];
|
| 1143 |
|
| 1144 |
void serial_update_irq(void) |
| 1145 |
{
|
| 1146 |
SerialState *s = &serial_ports[0];
|
| 1147 |
|
| 1148 |
if ((s->lsr & UART_LSR_DR) && (s->ier & UART_IER_RDI)) {
|
| 1149 |
s->iir = UART_IIR_RDI; |
| 1150 |
} else if ((s->lsr & UART_LSR_THRE) && (s->ier & UART_IER_THRI)) { |
| 1151 |
s->iir = UART_IIR_THRI; |
| 1152 |
} else {
|
| 1153 |
s->iir = UART_IIR_NO_INT; |
| 1154 |
} |
| 1155 |
if (s->iir != UART_IIR_NO_INT) {
|
| 1156 |
pic_set_irq(UART_IRQ, 1);
|
| 1157 |
} else {
|
| 1158 |
pic_set_irq(UART_IRQ, 0);
|
| 1159 |
} |
| 1160 |
} |
| 1161 |
|
| 1162 |
void serial_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 1163 |
{
|
| 1164 |
SerialState *s = &serial_ports[0];
|
| 1165 |
unsigned char ch; |
| 1166 |
int ret;
|
| 1167 |
|
| 1168 |
addr &= 7;
|
| 1169 |
switch(addr) {
|
| 1170 |
default:
|
| 1171 |
case 0: |
| 1172 |
if (s->lcr & UART_LCR_DLAB) {
|
| 1173 |
s->divider = (s->divider & 0xff00) | val;
|
| 1174 |
} else {
|
| 1175 |
s->lsr &= ~UART_LSR_THRE; |
| 1176 |
serial_update_irq(); |
| 1177 |
|
| 1178 |
ch = val; |
| 1179 |
do {
|
| 1180 |
ret = write(1, &ch, 1); |
| 1181 |
} while (ret != 1); |
| 1182 |
s->lsr |= UART_LSR_THRE; |
| 1183 |
s->lsr |= UART_LSR_TEMT; |
| 1184 |
serial_update_irq(); |
| 1185 |
} |
| 1186 |
break;
|
| 1187 |
case 1: |
| 1188 |
if (s->lcr & UART_LCR_DLAB) {
|
| 1189 |
s->divider = (s->divider & 0x00ff) | (val << 8); |
| 1190 |
} else {
|
| 1191 |
s->ier = val; |
| 1192 |
serial_update_irq(); |
| 1193 |
} |
| 1194 |
break;
|
| 1195 |
case 2: |
| 1196 |
break;
|
| 1197 |
case 3: |
| 1198 |
s->lcr = val; |
| 1199 |
break;
|
| 1200 |
case 4: |
| 1201 |
s->mcr = val; |
| 1202 |
break;
|
| 1203 |
case 5: |
| 1204 |
break;
|
| 1205 |
case 6: |
| 1206 |
s->msr = val; |
| 1207 |
break;
|
| 1208 |
case 7: |
| 1209 |
s->scr = val; |
| 1210 |
break;
|
| 1211 |
} |
| 1212 |
} |
| 1213 |
|
| 1214 |
uint32_t serial_ioport_read(CPUX86State *env, uint32_t addr) |
| 1215 |
{
|
| 1216 |
SerialState *s = &serial_ports[0];
|
| 1217 |
uint32_t ret; |
| 1218 |
|
| 1219 |
addr &= 7;
|
| 1220 |
switch(addr) {
|
| 1221 |
default:
|
| 1222 |
case 0: |
| 1223 |
if (s->lcr & UART_LCR_DLAB) {
|
| 1224 |
ret = s->divider & 0xff;
|
| 1225 |
} else {
|
| 1226 |
ret = s->rbr; |
| 1227 |
s->lsr &= ~(UART_LSR_DR | UART_LSR_BI); |
| 1228 |
serial_update_irq(); |
| 1229 |
} |
| 1230 |
break;
|
| 1231 |
case 1: |
| 1232 |
if (s->lcr & UART_LCR_DLAB) {
|
| 1233 |
ret = (s->divider >> 8) & 0xff; |
| 1234 |
} else {
|
| 1235 |
ret = s->ier; |
| 1236 |
} |
| 1237 |
break;
|
| 1238 |
case 2: |
| 1239 |
ret = s->iir; |
| 1240 |
break;
|
| 1241 |
case 3: |
| 1242 |
ret = s->lcr; |
| 1243 |
break;
|
| 1244 |
case 4: |
| 1245 |
ret = s->mcr; |
| 1246 |
break;
|
| 1247 |
case 5: |
| 1248 |
ret = s->lsr; |
| 1249 |
break;
|
| 1250 |
case 6: |
| 1251 |
ret = s->msr; |
| 1252 |
break;
|
| 1253 |
case 7: |
| 1254 |
ret = s->scr; |
| 1255 |
break;
|
| 1256 |
} |
| 1257 |
return ret;
|
| 1258 |
} |
| 1259 |
|
| 1260 |
#define TERM_ESCAPE 0x01 /* ctrl-a is used for escape */ |
| 1261 |
static int term_got_escape; |
| 1262 |
|
| 1263 |
void term_print_help(void) |
| 1264 |
{
|
| 1265 |
printf("\n"
|
| 1266 |
"C-a h print this help\n"
|
| 1267 |
"C-a x exit emulatior\n"
|
| 1268 |
"C-a b send break (magic sysrq)\n"
|
| 1269 |
"C-a C-a send C-a\n"
|
| 1270 |
); |
| 1271 |
} |
| 1272 |
|
| 1273 |
/* called when a char is received */
|
| 1274 |
void serial_received_byte(SerialState *s, int ch) |
| 1275 |
{
|
| 1276 |
if (term_got_escape) {
|
| 1277 |
term_got_escape = 0;
|
| 1278 |
switch(ch) {
|
| 1279 |
case 'h': |
| 1280 |
term_print_help(); |
| 1281 |
break;
|
| 1282 |
case 'x': |
| 1283 |
exit(0);
|
| 1284 |
break;
|
| 1285 |
case 'b': |
| 1286 |
/* send break */
|
| 1287 |
s->rbr = 0;
|
| 1288 |
s->lsr |= UART_LSR_BI | UART_LSR_DR; |
| 1289 |
serial_update_irq(); |
| 1290 |
break;
|
| 1291 |
case TERM_ESCAPE:
|
| 1292 |
goto send_char;
|
| 1293 |
} |
| 1294 |
} else if (ch == TERM_ESCAPE) { |
| 1295 |
term_got_escape = 1;
|
| 1296 |
} else {
|
| 1297 |
send_char:
|
| 1298 |
s->rbr = ch; |
| 1299 |
s->lsr |= UART_LSR_DR; |
| 1300 |
serial_update_irq(); |
| 1301 |
} |
| 1302 |
} |
| 1303 |
|
| 1304 |
/* init terminal so that we can grab keys */
|
| 1305 |
static struct termios oldtty; |
| 1306 |
|
| 1307 |
static void term_exit(void) |
| 1308 |
{
|
| 1309 |
tcsetattr (0, TCSANOW, &oldtty);
|
| 1310 |
} |
| 1311 |
|
| 1312 |
static void term_init(void) |
| 1313 |
{
|
| 1314 |
struct termios tty;
|
| 1315 |
|
| 1316 |
tcgetattr (0, &tty);
|
| 1317 |
oldtty = tty; |
| 1318 |
|
| 1319 |
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
| 1320 |
|INLCR|IGNCR|ICRNL|IXON); |
| 1321 |
tty.c_oflag |= OPOST; |
| 1322 |
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG); |
| 1323 |
tty.c_cflag &= ~(CSIZE|PARENB); |
| 1324 |
tty.c_cflag |= CS8; |
| 1325 |
tty.c_cc[VMIN] = 1;
|
| 1326 |
tty.c_cc[VTIME] = 0;
|
| 1327 |
|
| 1328 |
tcsetattr (0, TCSANOW, &tty);
|
| 1329 |
|
| 1330 |
atexit(term_exit); |
| 1331 |
|
| 1332 |
fcntl(0, F_SETFL, O_NONBLOCK);
|
| 1333 |
} |
| 1334 |
|
| 1335 |
void serial_init(void) |
| 1336 |
{
|
| 1337 |
SerialState *s = &serial_ports[0];
|
| 1338 |
|
| 1339 |
s->lsr = UART_LSR_TEMT | UART_LSR_THRE; |
| 1340 |
|
| 1341 |
register_ioport_write(0x3f8, 8, serial_ioport_write, 1); |
| 1342 |
register_ioport_read(0x3f8, 8, serial_ioport_read, 1); |
| 1343 |
|
| 1344 |
term_init(); |
| 1345 |
} |
| 1346 |
|
| 1347 |
/***********************************************************/
|
| 1348 |
/* ne2000 emulation */
|
| 1349 |
|
| 1350 |
//#define DEBUG_NE2000
|
| 1351 |
|
| 1352 |
#define NE2000_IOPORT 0x300 |
| 1353 |
#define NE2000_IRQ 9 |
| 1354 |
|
| 1355 |
#define MAX_ETH_FRAME_SIZE 1514 |
| 1356 |
|
| 1357 |
#define E8390_CMD 0x00 /* The command register (for all pages) */ |
| 1358 |
/* Page 0 register offsets. */
|
| 1359 |
#define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */ |
| 1360 |
#define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */ |
| 1361 |
#define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */ |
| 1362 |
#define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */ |
| 1363 |
#define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */ |
| 1364 |
#define EN0_TSR 0x04 /* Transmit status reg RD */ |
| 1365 |
#define EN0_TPSR 0x04 /* Transmit starting page WR */ |
| 1366 |
#define EN0_NCR 0x05 /* Number of collision reg RD */ |
| 1367 |
#define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */ |
| 1368 |
#define EN0_FIFO 0x06 /* FIFO RD */ |
| 1369 |
#define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */ |
| 1370 |
#define EN0_ISR 0x07 /* Interrupt status reg RD WR */ |
| 1371 |
#define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */ |
| 1372 |
#define EN0_RSARLO 0x08 /* Remote start address reg 0 */ |
| 1373 |
#define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */ |
| 1374 |
#define EN0_RSARHI 0x09 /* Remote start address reg 1 */ |
| 1375 |
#define EN0_RCNTLO 0x0a /* Remote byte count reg WR */ |
| 1376 |
#define EN0_RCNTHI 0x0b /* Remote byte count reg WR */ |
| 1377 |
#define EN0_RSR 0x0c /* rx status reg RD */ |
| 1378 |
#define EN0_RXCR 0x0c /* RX configuration reg WR */ |
| 1379 |
#define EN0_TXCR 0x0d /* TX configuration reg WR */ |
| 1380 |
#define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */ |
| 1381 |
#define EN0_DCFG 0x0e /* Data configuration reg WR */ |
| 1382 |
#define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */ |
| 1383 |
#define EN0_IMR 0x0f /* Interrupt mask reg WR */ |
| 1384 |
#define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */ |
| 1385 |
|
| 1386 |
#define EN1_PHYS 0x11 |
| 1387 |
#define EN1_CURPAG 0x17 |
| 1388 |
#define EN1_MULT 0x18 |
| 1389 |
|
| 1390 |
/* Register accessed at EN_CMD, the 8390 base addr. */
|
| 1391 |
#define E8390_STOP 0x01 /* Stop and reset the chip */ |
| 1392 |
#define E8390_START 0x02 /* Start the chip, clear reset */ |
| 1393 |
#define E8390_TRANS 0x04 /* Transmit a frame */ |
| 1394 |
#define E8390_RREAD 0x08 /* Remote read */ |
| 1395 |
#define E8390_RWRITE 0x10 /* Remote write */ |
| 1396 |
#define E8390_NODMA 0x20 /* Remote DMA */ |
| 1397 |
#define E8390_PAGE0 0x00 /* Select page chip registers */ |
| 1398 |
#define E8390_PAGE1 0x40 /* using the two high-order bits */ |
| 1399 |
#define E8390_PAGE2 0x80 /* Page 3 is invalid. */ |
| 1400 |
|
| 1401 |
/* Bits in EN0_ISR - Interrupt status register */
|
| 1402 |
#define ENISR_RX 0x01 /* Receiver, no error */ |
| 1403 |
#define ENISR_TX 0x02 /* Transmitter, no error */ |
| 1404 |
#define ENISR_RX_ERR 0x04 /* Receiver, with error */ |
| 1405 |
#define ENISR_TX_ERR 0x08 /* Transmitter, with error */ |
| 1406 |
#define ENISR_OVER 0x10 /* Receiver overwrote the ring */ |
| 1407 |
#define ENISR_COUNTERS 0x20 /* Counters need emptying */ |
| 1408 |
#define ENISR_RDC 0x40 /* remote dma complete */ |
| 1409 |
#define ENISR_RESET 0x80 /* Reset completed */ |
| 1410 |
#define ENISR_ALL 0x3f /* Interrupts we will enable */ |
| 1411 |
|
| 1412 |
/* Bits in received packet status byte and EN0_RSR*/
|
| 1413 |
#define ENRSR_RXOK 0x01 /* Received a good packet */ |
| 1414 |
#define ENRSR_CRC 0x02 /* CRC error */ |
| 1415 |
#define ENRSR_FAE 0x04 /* frame alignment error */ |
| 1416 |
#define ENRSR_FO 0x08 /* FIFO overrun */ |
| 1417 |
#define ENRSR_MPA 0x10 /* missed pkt */ |
| 1418 |
#define ENRSR_PHY 0x20 /* physical/multicast address */ |
| 1419 |
#define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */ |
| 1420 |
#define ENRSR_DEF 0x80 /* deferring */ |
| 1421 |
|
| 1422 |
/* Transmitted packet status, EN0_TSR. */
|
| 1423 |
#define ENTSR_PTX 0x01 /* Packet transmitted without error */ |
| 1424 |
#define ENTSR_ND 0x02 /* The transmit wasn't deferred. */ |
| 1425 |
#define ENTSR_COL 0x04 /* The transmit collided at least once. */ |
| 1426 |
#define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */ |
| 1427 |
#define ENTSR_CRS 0x10 /* The carrier sense was lost. */ |
| 1428 |
#define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */ |
| 1429 |
#define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */ |
| 1430 |
#define ENTSR_OWC 0x80 /* There was an out-of-window collision. */ |
| 1431 |
|
| 1432 |
#define NE2000_MEM_SIZE 32768 |
| 1433 |
|
| 1434 |
typedef struct NE2000State { |
| 1435 |
uint8_t cmd; |
| 1436 |
uint32_t start; |
| 1437 |
uint32_t stop; |
| 1438 |
uint8_t boundary; |
| 1439 |
uint8_t tsr; |
| 1440 |
uint8_t tpsr; |
| 1441 |
uint16_t tcnt; |
| 1442 |
uint16_t rcnt; |
| 1443 |
uint32_t rsar; |
| 1444 |
uint8_t isr; |
| 1445 |
uint8_t dcfg; |
| 1446 |
uint8_t imr; |
| 1447 |
uint8_t phys[6]; /* mac address */ |
| 1448 |
uint8_t curpag; |
| 1449 |
uint8_t mult[8]; /* multicast mask array */ |
| 1450 |
uint8_t mem[NE2000_MEM_SIZE]; |
| 1451 |
} NE2000State; |
| 1452 |
|
| 1453 |
NE2000State ne2000_state; |
| 1454 |
int net_fd = -1; |
| 1455 |
char network_script[1024]; |
| 1456 |
|
| 1457 |
void ne2000_reset(void) |
| 1458 |
{
|
| 1459 |
NE2000State *s = &ne2000_state; |
| 1460 |
int i;
|
| 1461 |
|
| 1462 |
s->isr = ENISR_RESET; |
| 1463 |
s->mem[0] = 0x52; |
| 1464 |
s->mem[1] = 0x54; |
| 1465 |
s->mem[2] = 0x00; |
| 1466 |
s->mem[3] = 0x12; |
| 1467 |
s->mem[4] = 0x34; |
| 1468 |
s->mem[5] = 0x56; |
| 1469 |
s->mem[14] = 0x57; |
| 1470 |
s->mem[15] = 0x57; |
| 1471 |
|
| 1472 |
/* duplicate prom data */
|
| 1473 |
for(i = 15;i >= 0; i--) { |
| 1474 |
s->mem[2 * i] = s->mem[i];
|
| 1475 |
s->mem[2 * i + 1] = s->mem[i]; |
| 1476 |
} |
| 1477 |
} |
| 1478 |
|
| 1479 |
void ne2000_update_irq(NE2000State *s)
|
| 1480 |
{
|
| 1481 |
int isr;
|
| 1482 |
isr = s->isr & s->imr; |
| 1483 |
if (isr)
|
| 1484 |
pic_set_irq(NE2000_IRQ, 1);
|
| 1485 |
else
|
| 1486 |
pic_set_irq(NE2000_IRQ, 0);
|
| 1487 |
} |
| 1488 |
|
| 1489 |
int net_init(void) |
| 1490 |
{
|
| 1491 |
struct ifreq ifr;
|
| 1492 |
int fd, ret, pid, status;
|
| 1493 |
|
| 1494 |
fd = open("/dev/net/tun", O_RDWR);
|
| 1495 |
if (fd < 0) { |
| 1496 |
fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
|
| 1497 |
return -1; |
| 1498 |
} |
| 1499 |
memset(&ifr, 0, sizeof(ifr)); |
| 1500 |
ifr.ifr_flags = IFF_TAP | IFF_NO_PI; |
| 1501 |
pstrcpy(ifr.ifr_name, IFNAMSIZ, "tun%d");
|
| 1502 |
ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
|
| 1503 |
if (ret != 0) { |
| 1504 |
fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
|
| 1505 |
close(fd); |
| 1506 |
return -1; |
| 1507 |
} |
| 1508 |
printf("Connected to host network interface: %s\n", ifr.ifr_name);
|
| 1509 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
| 1510 |
net_fd = fd; |
| 1511 |
|
| 1512 |
/* try to launch network init script */
|
| 1513 |
pid = fork(); |
| 1514 |
if (pid >= 0) { |
| 1515 |
if (pid == 0) { |
| 1516 |
execl(network_script, network_script, ifr.ifr_name, NULL);
|
| 1517 |
exit(1);
|
| 1518 |
} |
| 1519 |
while (waitpid(pid, &status, 0) != pid); |
| 1520 |
if (!WIFEXITED(status) ||
|
| 1521 |
WEXITSTATUS(status) != 0) {
|
| 1522 |
fprintf(stderr, "%s: could not launch network script for '%s'\n",
|
| 1523 |
network_script, ifr.ifr_name); |
| 1524 |
} |
| 1525 |
} |
| 1526 |
return 0; |
| 1527 |
} |
| 1528 |
|
| 1529 |
void net_send_packet(NE2000State *s, const uint8_t *buf, int size) |
| 1530 |
{
|
| 1531 |
#ifdef DEBUG_NE2000
|
| 1532 |
printf("NE2000: sending packet size=%d\n", size);
|
| 1533 |
#endif
|
| 1534 |
write(net_fd, buf, size); |
| 1535 |
} |
| 1536 |
|
| 1537 |
/* return true if the NE2000 can receive more data */
|
| 1538 |
int ne2000_can_receive(NE2000State *s)
|
| 1539 |
{
|
| 1540 |
int avail, index, boundary;
|
| 1541 |
|
| 1542 |
if (s->cmd & E8390_STOP)
|
| 1543 |
return 0; |
| 1544 |
index = s->curpag << 8;
|
| 1545 |
boundary = s->boundary << 8;
|
| 1546 |
if (index < boundary)
|
| 1547 |
avail = boundary - index; |
| 1548 |
else
|
| 1549 |
avail = (s->stop - s->start) - (index - boundary); |
| 1550 |
if (avail < (MAX_ETH_FRAME_SIZE + 4)) |
| 1551 |
return 0; |
| 1552 |
return 1; |
| 1553 |
} |
| 1554 |
|
| 1555 |
void ne2000_receive(NE2000State *s, uint8_t *buf, int size) |
| 1556 |
{
|
| 1557 |
uint8_t *p; |
| 1558 |
int total_len, next, avail, len, index;
|
| 1559 |
|
| 1560 |
#if defined(DEBUG_NE2000)
|
| 1561 |
printf("NE2000: received len=%d\n", size);
|
| 1562 |
#endif
|
| 1563 |
|
| 1564 |
index = s->curpag << 8;
|
| 1565 |
/* 4 bytes for header */
|
| 1566 |
total_len = size + 4;
|
| 1567 |
/* address for next packet (4 bytes for CRC) */
|
| 1568 |
next = index + ((total_len + 4 + 255) & ~0xff); |
| 1569 |
if (next >= s->stop)
|
| 1570 |
next -= (s->stop - s->start); |
| 1571 |
/* prepare packet header */
|
| 1572 |
p = s->mem + index; |
| 1573 |
p[0] = ENRSR_RXOK; /* receive status */ |
| 1574 |
p[1] = next >> 8; |
| 1575 |
p[2] = total_len;
|
| 1576 |
p[3] = total_len >> 8; |
| 1577 |
index += 4;
|
| 1578 |
|
| 1579 |
/* write packet data */
|
| 1580 |
while (size > 0) { |
| 1581 |
avail = s->stop - index; |
| 1582 |
len = size; |
| 1583 |
if (len > avail)
|
| 1584 |
len = avail; |
| 1585 |
memcpy(s->mem + index, buf, len); |
| 1586 |
buf += len; |
| 1587 |
index += len; |
| 1588 |
if (index == s->stop)
|
| 1589 |
index = s->start; |
| 1590 |
size -= len; |
| 1591 |
} |
| 1592 |
s->curpag = next >> 8;
|
| 1593 |
|
| 1594 |
/* now we can signal we have receive something */
|
| 1595 |
s->isr |= ENISR_RX; |
| 1596 |
ne2000_update_irq(s); |
| 1597 |
} |
| 1598 |
|
| 1599 |
void ne2000_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 1600 |
{
|
| 1601 |
NE2000State *s = &ne2000_state; |
| 1602 |
int offset, page;
|
| 1603 |
|
| 1604 |
addr &= 0xf;
|
| 1605 |
#ifdef DEBUG_NE2000
|
| 1606 |
printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val);
|
| 1607 |
#endif
|
| 1608 |
if (addr == E8390_CMD) {
|
| 1609 |
/* control register */
|
| 1610 |
s->cmd = val; |
| 1611 |
if (val & E8390_START) {
|
| 1612 |
/* test specific case: zero length transfert */
|
| 1613 |
if ((val & (E8390_RREAD | E8390_RWRITE)) &&
|
| 1614 |
s->rcnt == 0) {
|
| 1615 |
s->isr |= ENISR_RDC; |
| 1616 |
ne2000_update_irq(s); |
| 1617 |
} |
| 1618 |
if (val & E8390_TRANS) {
|
| 1619 |
net_send_packet(s, s->mem + (s->tpsr << 8), s->tcnt);
|
| 1620 |
/* signal end of transfert */
|
| 1621 |
s->tsr = ENTSR_PTX; |
| 1622 |
s->isr |= ENISR_TX; |
| 1623 |
ne2000_update_irq(s); |
| 1624 |
} |
| 1625 |
} |
| 1626 |
} else {
|
| 1627 |
page = s->cmd >> 6;
|
| 1628 |
offset = addr | (page << 4);
|
| 1629 |
switch(offset) {
|
| 1630 |
case EN0_STARTPG:
|
| 1631 |
s->start = val << 8;
|
| 1632 |
break;
|
| 1633 |
case EN0_STOPPG:
|
| 1634 |
s->stop = val << 8;
|
| 1635 |
break;
|
| 1636 |
case EN0_BOUNDARY:
|
| 1637 |
s->boundary = val; |
| 1638 |
break;
|
| 1639 |
case EN0_IMR:
|
| 1640 |
s->imr = val; |
| 1641 |
ne2000_update_irq(s); |
| 1642 |
break;
|
| 1643 |
case EN0_TPSR:
|
| 1644 |
s->tpsr = val; |
| 1645 |
break;
|
| 1646 |
case EN0_TCNTLO:
|
| 1647 |
s->tcnt = (s->tcnt & 0xff00) | val;
|
| 1648 |
break;
|
| 1649 |
case EN0_TCNTHI:
|
| 1650 |
s->tcnt = (s->tcnt & 0x00ff) | (val << 8); |
| 1651 |
break;
|
| 1652 |
case EN0_RSARLO:
|
| 1653 |
s->rsar = (s->rsar & 0xff00) | val;
|
| 1654 |
break;
|
| 1655 |
case EN0_RSARHI:
|
| 1656 |
s->rsar = (s->rsar & 0x00ff) | (val << 8); |
| 1657 |
break;
|
| 1658 |
case EN0_RCNTLO:
|
| 1659 |
s->rcnt = (s->rcnt & 0xff00) | val;
|
| 1660 |
break;
|
| 1661 |
case EN0_RCNTHI:
|
| 1662 |
s->rcnt = (s->rcnt & 0x00ff) | (val << 8); |
| 1663 |
break;
|
| 1664 |
case EN0_DCFG:
|
| 1665 |
s->dcfg = val; |
| 1666 |
break;
|
| 1667 |
case EN0_ISR:
|
| 1668 |
s->isr &= ~val; |
| 1669 |
ne2000_update_irq(s); |
| 1670 |
break;
|
| 1671 |
case EN1_PHYS ... EN1_PHYS + 5: |
| 1672 |
s->phys[offset - EN1_PHYS] = val; |
| 1673 |
break;
|
| 1674 |
case EN1_CURPAG:
|
| 1675 |
s->curpag = val; |
| 1676 |
break;
|
| 1677 |
case EN1_MULT ... EN1_MULT + 7: |
| 1678 |
s->mult[offset - EN1_MULT] = val; |
| 1679 |
break;
|
| 1680 |
} |
| 1681 |
} |
| 1682 |
} |
| 1683 |
|
| 1684 |
uint32_t ne2000_ioport_read(CPUX86State *env, uint32_t addr) |
| 1685 |
{
|
| 1686 |
NE2000State *s = &ne2000_state; |
| 1687 |
int offset, page, ret;
|
| 1688 |
|
| 1689 |
addr &= 0xf;
|
| 1690 |
if (addr == E8390_CMD) {
|
| 1691 |
ret = s->cmd; |
| 1692 |
} else {
|
| 1693 |
page = s->cmd >> 6;
|
| 1694 |
offset = addr | (page << 4);
|
| 1695 |
switch(offset) {
|
| 1696 |
case EN0_TSR:
|
| 1697 |
ret = s->tsr; |
| 1698 |
break;
|
| 1699 |
case EN0_BOUNDARY:
|
| 1700 |
ret = s->boundary; |
| 1701 |
break;
|
| 1702 |
case EN0_ISR:
|
| 1703 |
ret = s->isr; |
| 1704 |
break;
|
| 1705 |
case EN1_PHYS ... EN1_PHYS + 5: |
| 1706 |
ret = s->phys[offset - EN1_PHYS]; |
| 1707 |
break;
|
| 1708 |
case EN1_CURPAG:
|
| 1709 |
ret = s->curpag; |
| 1710 |
break;
|
| 1711 |
case EN1_MULT ... EN1_MULT + 7: |
| 1712 |
ret = s->mult[offset - EN1_MULT]; |
| 1713 |
break;
|
| 1714 |
default:
|
| 1715 |
ret = 0x00;
|
| 1716 |
break;
|
| 1717 |
} |
| 1718 |
} |
| 1719 |
#ifdef DEBUG_NE2000
|
| 1720 |
printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
|
| 1721 |
#endif
|
| 1722 |
return ret;
|
| 1723 |
} |
| 1724 |
|
| 1725 |
void ne2000_asic_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 1726 |
{
|
| 1727 |
NE2000State *s = &ne2000_state; |
| 1728 |
uint8_t *p; |
| 1729 |
|
| 1730 |
#ifdef DEBUG_NE2000
|
| 1731 |
printf("NE2000: asic write val=0x%04x\n", val);
|
| 1732 |
#endif
|
| 1733 |
p = s->mem + s->rsar; |
| 1734 |
if (s->dcfg & 0x01) { |
| 1735 |
/* 16 bit access */
|
| 1736 |
p[0] = val;
|
| 1737 |
p[1] = val >> 8; |
| 1738 |
s->rsar += 2;
|
| 1739 |
s->rcnt -= 2;
|
| 1740 |
} else {
|
| 1741 |
/* 8 bit access */
|
| 1742 |
p[0] = val;
|
| 1743 |
s->rsar++; |
| 1744 |
s->rcnt--; |
| 1745 |
} |
| 1746 |
/* wrap */
|
| 1747 |
if (s->rsar == s->stop)
|
| 1748 |
s->rsar = s->start; |
| 1749 |
if (s->rcnt == 0) { |
| 1750 |
/* signal end of transfert */
|
| 1751 |
s->isr |= ENISR_RDC; |
| 1752 |
ne2000_update_irq(s); |
| 1753 |
} |
| 1754 |
} |
| 1755 |
|
| 1756 |
uint32_t ne2000_asic_ioport_read(CPUX86State *env, uint32_t addr) |
| 1757 |
{
|
| 1758 |
NE2000State *s = &ne2000_state; |
| 1759 |
uint8_t *p; |
| 1760 |
int ret;
|
| 1761 |
|
| 1762 |
p = s->mem + s->rsar; |
| 1763 |
if (s->dcfg & 0x01) { |
| 1764 |
/* 16 bit access */
|
| 1765 |
ret = p[0] | (p[1] << 8); |
| 1766 |
s->rsar += 2;
|
| 1767 |
s->rcnt -= 2;
|
| 1768 |
} else {
|
| 1769 |
/* 8 bit access */
|
| 1770 |
ret = p[0];
|
| 1771 |
s->rsar++; |
| 1772 |
s->rcnt--; |
| 1773 |
} |
| 1774 |
/* wrap */
|
| 1775 |
if (s->rsar == s->stop)
|
| 1776 |
s->rsar = s->start; |
| 1777 |
if (s->rcnt == 0) { |
| 1778 |
/* signal end of transfert */
|
| 1779 |
s->isr |= ENISR_RDC; |
| 1780 |
ne2000_update_irq(s); |
| 1781 |
} |
| 1782 |
#ifdef DEBUG_NE2000
|
| 1783 |
printf("NE2000: asic read val=0x%04x\n", ret);
|
| 1784 |
#endif
|
| 1785 |
return ret;
|
| 1786 |
} |
| 1787 |
|
| 1788 |
void ne2000_reset_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 1789 |
{
|
| 1790 |
/* nothing to do (end of reset pulse) */
|
| 1791 |
} |
| 1792 |
|
| 1793 |
uint32_t ne2000_reset_ioport_read(CPUX86State *env, uint32_t addr) |
| 1794 |
{
|
| 1795 |
ne2000_reset(); |
| 1796 |
return 0; |
| 1797 |
} |
| 1798 |
|
| 1799 |
void ne2000_init(void) |
| 1800 |
{
|
| 1801 |
register_ioport_write(NE2000_IOPORT, 16, ne2000_ioport_write, 1); |
| 1802 |
register_ioport_read(NE2000_IOPORT, 16, ne2000_ioport_read, 1); |
| 1803 |
|
| 1804 |
register_ioport_write(NE2000_IOPORT + 0x10, 1, ne2000_asic_ioport_write, 1); |
| 1805 |
register_ioport_read(NE2000_IOPORT + 0x10, 1, ne2000_asic_ioport_read, 1); |
| 1806 |
register_ioport_write(NE2000_IOPORT + 0x10, 2, ne2000_asic_ioport_write, 2); |
| 1807 |
register_ioport_read(NE2000_IOPORT + 0x10, 2, ne2000_asic_ioport_read, 2); |
| 1808 |
|
| 1809 |
register_ioport_write(NE2000_IOPORT + 0x1f, 1, ne2000_reset_ioport_write, 1); |
| 1810 |
register_ioport_read(NE2000_IOPORT + 0x1f, 1, ne2000_reset_ioport_read, 1); |
| 1811 |
ne2000_reset(); |
| 1812 |
} |
| 1813 |
|
| 1814 |
/***********************************************************/
|
| 1815 |
/* ide emulation */
|
| 1816 |
|
| 1817 |
//#define DEBUG_IDE
|
| 1818 |
|
| 1819 |
/* Bits of HD_STATUS */
|
| 1820 |
#define ERR_STAT 0x01 |
| 1821 |
#define INDEX_STAT 0x02 |
| 1822 |
#define ECC_STAT 0x04 /* Corrected error */ |
| 1823 |
#define DRQ_STAT 0x08 |
| 1824 |
#define SEEK_STAT 0x10 |
| 1825 |
#define SRV_STAT 0x10 |
| 1826 |
#define WRERR_STAT 0x20 |
| 1827 |
#define READY_STAT 0x40 |
| 1828 |
#define BUSY_STAT 0x80 |
| 1829 |
|
| 1830 |
/* Bits for HD_ERROR */
|
| 1831 |
#define MARK_ERR 0x01 /* Bad address mark */ |
| 1832 |
#define TRK0_ERR 0x02 /* couldn't find track 0 */ |
| 1833 |
#define ABRT_ERR 0x04 /* Command aborted */ |
| 1834 |
#define MCR_ERR 0x08 /* media change request */ |
| 1835 |
#define ID_ERR 0x10 /* ID field not found */ |
| 1836 |
#define MC_ERR 0x20 /* media changed */ |
| 1837 |
#define ECC_ERR 0x40 /* Uncorrectable ECC error */ |
| 1838 |
#define BBD_ERR 0x80 /* pre-EIDE meaning: block marked bad */ |
| 1839 |
#define ICRC_ERR 0x80 /* new meaning: CRC error during transfer */ |
| 1840 |
|
| 1841 |
/* Bits of HD_NSECTOR */
|
| 1842 |
#define CD 0x01 |
| 1843 |
#define IO 0x02 |
| 1844 |
#define REL 0x04 |
| 1845 |
#define TAG_MASK 0xf8 |
| 1846 |
|
| 1847 |
#define IDE_CMD_RESET 0x04 |
| 1848 |
#define IDE_CMD_DISABLE_IRQ 0x02 |
| 1849 |
|
| 1850 |
/* ATA/ATAPI Commands pre T13 Spec */
|
| 1851 |
#define WIN_NOP 0x00 |
| 1852 |
/*
|
| 1853 |
* 0x01->0x02 Reserved
|
| 1854 |
*/
|
| 1855 |
#define CFA_REQ_EXT_ERROR_CODE 0x03 /* CFA Request Extended Error Code */ |
| 1856 |
/*
|
| 1857 |
* 0x04->0x07 Reserved
|
| 1858 |
*/
|
| 1859 |
#define WIN_SRST 0x08 /* ATAPI soft reset command */ |
| 1860 |
#define WIN_DEVICE_RESET 0x08 |
| 1861 |
/*
|
| 1862 |
* 0x09->0x0F Reserved
|
| 1863 |
*/
|
| 1864 |
#define WIN_RECAL 0x10 |
| 1865 |
#define WIN_RESTORE WIN_RECAL
|
| 1866 |
/*
|
| 1867 |
* 0x10->0x1F Reserved
|
| 1868 |
*/
|
| 1869 |
#define WIN_READ 0x20 /* 28-Bit */ |
| 1870 |
#define WIN_READ_ONCE 0x21 /* 28-Bit without retries */ |
| 1871 |
#define WIN_READ_LONG 0x22 /* 28-Bit */ |
| 1872 |
#define WIN_READ_LONG_ONCE 0x23 /* 28-Bit without retries */ |
| 1873 |
#define WIN_READ_EXT 0x24 /* 48-Bit */ |
| 1874 |
#define WIN_READDMA_EXT 0x25 /* 48-Bit */ |
| 1875 |
#define WIN_READDMA_QUEUED_EXT 0x26 /* 48-Bit */ |
| 1876 |
#define WIN_READ_NATIVE_MAX_EXT 0x27 /* 48-Bit */ |
| 1877 |
/*
|
| 1878 |
* 0x28
|
| 1879 |
*/
|
| 1880 |
#define WIN_MULTREAD_EXT 0x29 /* 48-Bit */ |
| 1881 |
/*
|
| 1882 |
* 0x2A->0x2F Reserved
|
| 1883 |
*/
|
| 1884 |
#define WIN_WRITE 0x30 /* 28-Bit */ |
| 1885 |
#define WIN_WRITE_ONCE 0x31 /* 28-Bit without retries */ |
| 1886 |
#define WIN_WRITE_LONG 0x32 /* 28-Bit */ |
| 1887 |
#define WIN_WRITE_LONG_ONCE 0x33 /* 28-Bit without retries */ |
| 1888 |
#define WIN_WRITE_EXT 0x34 /* 48-Bit */ |
| 1889 |
#define WIN_WRITEDMA_EXT 0x35 /* 48-Bit */ |
| 1890 |
#define WIN_WRITEDMA_QUEUED_EXT 0x36 /* 48-Bit */ |
| 1891 |
#define WIN_SET_MAX_EXT 0x37 /* 48-Bit */ |
| 1892 |
#define CFA_WRITE_SECT_WO_ERASE 0x38 /* CFA Write Sectors without erase */ |
| 1893 |
#define WIN_MULTWRITE_EXT 0x39 /* 48-Bit */ |
| 1894 |
/*
|
| 1895 |
* 0x3A->0x3B Reserved
|
| 1896 |
*/
|
| 1897 |
#define WIN_WRITE_VERIFY 0x3C /* 28-Bit */ |
| 1898 |
/*
|
| 1899 |
* 0x3D->0x3F Reserved
|
| 1900 |
*/
|
| 1901 |
#define WIN_VERIFY 0x40 /* 28-Bit - Read Verify Sectors */ |
| 1902 |
#define WIN_VERIFY_ONCE 0x41 /* 28-Bit - without retries */ |
| 1903 |
#define WIN_VERIFY_EXT 0x42 /* 48-Bit */ |
| 1904 |
/*
|
| 1905 |
* 0x43->0x4F Reserved
|
| 1906 |
*/
|
| 1907 |
#define WIN_FORMAT 0x50 |
| 1908 |
/*
|
| 1909 |
* 0x51->0x5F Reserved
|
| 1910 |
*/
|
| 1911 |
#define WIN_INIT 0x60 |
| 1912 |
/*
|
| 1913 |
* 0x61->0x5F Reserved
|
| 1914 |
*/
|
| 1915 |
#define WIN_SEEK 0x70 /* 0x70-0x7F Reserved */ |
| 1916 |
#define CFA_TRANSLATE_SECTOR 0x87 /* CFA Translate Sector */ |
| 1917 |
#define WIN_DIAGNOSE 0x90 |
| 1918 |
#define WIN_SPECIFY 0x91 /* set drive geometry translation */ |
| 1919 |
#define WIN_DOWNLOAD_MICROCODE 0x92 |
| 1920 |
#define WIN_STANDBYNOW2 0x94 |
| 1921 |
#define WIN_STANDBY2 0x96 |
| 1922 |
#define WIN_SETIDLE2 0x97 |
| 1923 |
#define WIN_CHECKPOWERMODE2 0x98 |
| 1924 |
#define WIN_SLEEPNOW2 0x99 |
| 1925 |
/*
|
| 1926 |
* 0x9A VENDOR
|
| 1927 |
*/
|
| 1928 |
#define WIN_PACKETCMD 0xA0 /* Send a packet command. */ |
| 1929 |
#define WIN_PIDENTIFY 0xA1 /* identify ATAPI device */ |
| 1930 |
#define WIN_QUEUED_SERVICE 0xA2 |
| 1931 |
#define WIN_SMART 0xB0 /* self-monitoring and reporting */ |
| 1932 |
#define CFA_ERASE_SECTORS 0xC0 |
| 1933 |
#define WIN_MULTREAD 0xC4 /* read sectors using multiple mode*/ |
| 1934 |
#define WIN_MULTWRITE 0xC5 /* write sectors using multiple mode */ |
| 1935 |
#define WIN_SETMULT 0xC6 /* enable/disable multiple mode */ |
| 1936 |
#define WIN_READDMA_QUEUED 0xC7 /* read sectors using Queued DMA transfers */ |
| 1937 |
#define WIN_READDMA 0xC8 /* read sectors using DMA transfers */ |
| 1938 |
#define WIN_READDMA_ONCE 0xC9 /* 28-Bit - without retries */ |
| 1939 |
#define WIN_WRITEDMA 0xCA /* write sectors using DMA transfers */ |
| 1940 |
#define WIN_WRITEDMA_ONCE 0xCB /* 28-Bit - without retries */ |
| 1941 |
#define WIN_WRITEDMA_QUEUED 0xCC /* write sectors using Queued DMA transfers */ |
| 1942 |
#define CFA_WRITE_MULTI_WO_ERASE 0xCD /* CFA Write multiple without erase */ |
| 1943 |
#define WIN_GETMEDIASTATUS 0xDA |
| 1944 |
#define WIN_ACKMEDIACHANGE 0xDB /* ATA-1, ATA-2 vendor */ |
| 1945 |
#define WIN_POSTBOOT 0xDC |
| 1946 |
#define WIN_PREBOOT 0xDD |
| 1947 |
#define WIN_DOORLOCK 0xDE /* lock door on removable drives */ |
| 1948 |
#define WIN_DOORUNLOCK 0xDF /* unlock door on removable drives */ |
| 1949 |
#define WIN_STANDBYNOW1 0xE0 |
| 1950 |
#define WIN_IDLEIMMEDIATE 0xE1 /* force drive to become "ready" */ |
| 1951 |
#define WIN_STANDBY 0xE2 /* Set device in Standby Mode */ |
| 1952 |
#define WIN_SETIDLE1 0xE3 |
| 1953 |
#define WIN_READ_BUFFER 0xE4 /* force read only 1 sector */ |
| 1954 |
#define WIN_CHECKPOWERMODE1 0xE5 |
| 1955 |
#define WIN_SLEEPNOW1 0xE6 |
| 1956 |
#define WIN_FLUSH_CACHE 0xE7 |
| 1957 |
#define WIN_WRITE_BUFFER 0xE8 /* force write only 1 sector */ |
| 1958 |
#define WIN_WRITE_SAME 0xE9 /* read ata-2 to use */ |
| 1959 |
/* SET_FEATURES 0x22 or 0xDD */
|
| 1960 |
#define WIN_FLUSH_CACHE_EXT 0xEA /* 48-Bit */ |
| 1961 |
#define WIN_IDENTIFY 0xEC /* ask drive to identify itself */ |
| 1962 |
#define WIN_MEDIAEJECT 0xED |
| 1963 |
#define WIN_IDENTIFY_DMA 0xEE /* same as WIN_IDENTIFY, but DMA */ |
| 1964 |
#define WIN_SETFEATURES 0xEF /* set special drive features */ |
| 1965 |
#define EXABYTE_ENABLE_NEST 0xF0 |
| 1966 |
#define WIN_SECURITY_SET_PASS 0xF1 |
| 1967 |
#define WIN_SECURITY_UNLOCK 0xF2 |
| 1968 |
#define WIN_SECURITY_ERASE_PREPARE 0xF3 |
| 1969 |
#define WIN_SECURITY_ERASE_UNIT 0xF4 |
| 1970 |
#define WIN_SECURITY_FREEZE_LOCK 0xF5 |
| 1971 |
#define WIN_SECURITY_DISABLE 0xF6 |
| 1972 |
#define WIN_READ_NATIVE_MAX 0xF8 /* return the native maximum address */ |
| 1973 |
#define WIN_SET_MAX 0xF9 |
| 1974 |
#define DISABLE_SEAGATE 0xFB |
| 1975 |
|
| 1976 |
/* set to 1 set disable mult support */
|
| 1977 |
#define MAX_MULT_SECTORS 8 |
| 1978 |
|
| 1979 |
#define MAX_DISKS 2 |
| 1980 |
|
| 1981 |
struct IDEState;
|
| 1982 |
|
| 1983 |
typedef void EndTransferFunc(struct IDEState *); |
| 1984 |
|
| 1985 |
typedef struct IDEState { |
| 1986 |
/* ide config */
|
| 1987 |
int cylinders, heads, sectors;
|
| 1988 |
int64_t nb_sectors; |
| 1989 |
int mult_sectors;
|
| 1990 |
int irq;
|
| 1991 |
/* ide regs */
|
| 1992 |
uint8_t feature; |
| 1993 |
uint8_t error; |
| 1994 |
uint16_t nsector; /* 0 is 256 to ease computations */
|
| 1995 |
uint8_t sector; |
| 1996 |
uint8_t lcyl; |
| 1997 |
uint8_t hcyl; |
| 1998 |
uint8_t select; |
| 1999 |
uint8_t status; |
| 2000 |
/* 0x3f6 command, only meaningful for drive 0 */
|
| 2001 |
uint8_t cmd; |
| 2002 |
/* depends on bit 4 in select, only meaningful for drive 0 */
|
| 2003 |
struct IDEState *cur_drive;
|
| 2004 |
BlockDriverState *bs; |
| 2005 |
int req_nb_sectors; /* number of sectors per interrupt */ |
| 2006 |
EndTransferFunc *end_transfer_func; |
| 2007 |
uint8_t *data_ptr; |
| 2008 |
uint8_t *data_end; |
| 2009 |
uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4]; |
| 2010 |
} IDEState; |
| 2011 |
|
| 2012 |
BlockDriverState *bs_table[MAX_DISKS]; |
| 2013 |
IDEState ide_state[MAX_DISKS]; |
| 2014 |
|
| 2015 |
static void padstr(char *str, const char *src, int len) |
| 2016 |
{
|
| 2017 |
int i, v;
|
| 2018 |
for(i = 0; i < len; i++) { |
| 2019 |
if (*src)
|
| 2020 |
v = *src++; |
| 2021 |
else
|
| 2022 |
v = ' ';
|
| 2023 |
*(char *)((long)str ^ 1) = v; |
| 2024 |
str++; |
| 2025 |
} |
| 2026 |
} |
| 2027 |
|
| 2028 |
static void ide_identify(IDEState *s) |
| 2029 |
{
|
| 2030 |
uint16_t *p; |
| 2031 |
unsigned int oldsize; |
| 2032 |
|
| 2033 |
memset(s->io_buffer, 0, 512); |
| 2034 |
p = (uint16_t *)s->io_buffer; |
| 2035 |
stw(p + 0, 0x0040); |
| 2036 |
stw(p + 1, s->cylinders);
|
| 2037 |
stw(p + 3, s->heads);
|
| 2038 |
stw(p + 4, 512 * s->sectors); /* sectors */ |
| 2039 |
stw(p + 5, 512); /* sector size */ |
| 2040 |
stw(p + 6, s->sectors);
|
| 2041 |
stw(p + 20, 3); /* buffer type */ |
| 2042 |
stw(p + 21, 512); /* cache size in sectors */ |
| 2043 |
stw(p + 22, 4); /* ecc bytes */ |
| 2044 |
padstr((uint8_t *)(p + 27), "QEMU HARDDISK", 40); |
| 2045 |
#if MAX_MULT_SECTORS > 1 |
| 2046 |
stw(p + 47, MAX_MULT_SECTORS);
|
| 2047 |
#endif
|
| 2048 |
stw(p + 48, 1); /* dword I/O */ |
| 2049 |
stw(p + 49, 1 << 9); /* LBA supported, no DMA */ |
| 2050 |
stw(p + 51, 0x200); /* PIO transfer cycle */ |
| 2051 |
stw(p + 52, 0x200); /* DMA transfer cycle */ |
| 2052 |
stw(p + 54, s->cylinders);
|
| 2053 |
stw(p + 55, s->heads);
|
| 2054 |
stw(p + 56, s->sectors);
|
| 2055 |
oldsize = s->cylinders * s->heads * s->sectors; |
| 2056 |
stw(p + 57, oldsize);
|
| 2057 |
stw(p + 58, oldsize >> 16); |
| 2058 |
if (s->mult_sectors)
|
| 2059 |
stw(p + 59, 0x100 | s->mult_sectors); |
| 2060 |
stw(p + 60, s->nb_sectors);
|
| 2061 |
stw(p + 61, s->nb_sectors >> 16); |
| 2062 |
stw(p + 80, (1 << 1) | (1 << 2)); |
| 2063 |
stw(p + 82, (1 << 14)); |
| 2064 |
stw(p + 83, (1 << 14)); |
| 2065 |
stw(p + 84, (1 << 14)); |
| 2066 |
stw(p + 85, (1 << 14)); |
| 2067 |
stw(p + 86, 0); |
| 2068 |
stw(p + 87, (1 << 14)); |
| 2069 |
} |
| 2070 |
|
| 2071 |
static inline void ide_abort_command(IDEState *s) |
| 2072 |
{
|
| 2073 |
s->status = READY_STAT | ERR_STAT; |
| 2074 |
s->error = ABRT_ERR; |
| 2075 |
} |
| 2076 |
|
| 2077 |
static inline void ide_set_irq(IDEState *s) |
| 2078 |
{
|
| 2079 |
if (!(ide_state[0].cmd & IDE_CMD_DISABLE_IRQ)) { |
| 2080 |
pic_set_irq(s->irq, 1);
|
| 2081 |
} |
| 2082 |
} |
| 2083 |
|
| 2084 |
/* prepare data transfer and tell what to do after */
|
| 2085 |
static void ide_transfer_start(IDEState *s, int size, |
| 2086 |
EndTransferFunc *end_transfer_func) |
| 2087 |
{
|
| 2088 |
s->end_transfer_func = end_transfer_func; |
| 2089 |
s->data_ptr = s->io_buffer; |
| 2090 |
s->data_end = s->io_buffer + size; |
| 2091 |
s->status |= DRQ_STAT; |
| 2092 |
} |
| 2093 |
|
| 2094 |
static void ide_transfer_stop(IDEState *s) |
| 2095 |
{
|
| 2096 |
s->end_transfer_func = ide_transfer_stop; |
| 2097 |
s->data_ptr = s->io_buffer; |
| 2098 |
s->data_end = s->io_buffer; |
| 2099 |
s->status &= ~DRQ_STAT; |
| 2100 |
} |
| 2101 |
|
| 2102 |
static int64_t ide_get_sector(IDEState *s)
|
| 2103 |
{
|
| 2104 |
int64_t sector_num; |
| 2105 |
if (s->select & 0x40) { |
| 2106 |
/* lba */
|
| 2107 |
sector_num = ((s->select & 0x0f) << 24) | (s->hcyl << 16) | |
| 2108 |
(s->lcyl << 8) | s->sector;
|
| 2109 |
} else {
|
| 2110 |
sector_num = ((s->hcyl << 8) | s->lcyl) * s->heads * s->sectors +
|
| 2111 |
(s->select & 0x0f) * s->sectors +
|
| 2112 |
(s->sector - 1);
|
| 2113 |
} |
| 2114 |
return sector_num;
|
| 2115 |
} |
| 2116 |
|
| 2117 |
static void ide_set_sector(IDEState *s, int64_t sector_num) |
| 2118 |
{
|
| 2119 |
unsigned int cyl, r; |
| 2120 |
if (s->select & 0x40) { |
| 2121 |
s->select = (s->select & 0xf0) | (sector_num >> 24); |
| 2122 |
s->hcyl = (sector_num >> 16);
|
| 2123 |
s->lcyl = (sector_num >> 8);
|
| 2124 |
s->sector = (sector_num); |
| 2125 |
} else {
|
| 2126 |
cyl = sector_num / (s->heads * s->sectors); |
| 2127 |
r = sector_num % (s->heads * s->sectors); |
| 2128 |
s->hcyl = cyl >> 8;
|
| 2129 |
s->lcyl = cyl; |
| 2130 |
s->select = (s->select & 0xf0) | (r / s->sectors);
|
| 2131 |
s->sector = (r % s->sectors) + 1;
|
| 2132 |
} |
| 2133 |
} |
| 2134 |
|
| 2135 |
static void ide_sector_read(IDEState *s) |
| 2136 |
{
|
| 2137 |
int64_t sector_num; |
| 2138 |
int ret, n;
|
| 2139 |
|
| 2140 |
s->status = READY_STAT | SEEK_STAT; |
| 2141 |
sector_num = ide_get_sector(s); |
| 2142 |
n = s->nsector; |
| 2143 |
if (n == 0) { |
| 2144 |
/* no more sector to read from disk */
|
| 2145 |
ide_transfer_stop(s); |
| 2146 |
} else {
|
| 2147 |
#if defined(DEBUG_IDE)
|
| 2148 |
printf("read sector=%Ld\n", sector_num);
|
| 2149 |
#endif
|
| 2150 |
if (n > s->req_nb_sectors)
|
| 2151 |
n = s->req_nb_sectors; |
| 2152 |
ret = bdrv_read(s->bs, sector_num, s->io_buffer, n); |
| 2153 |
ide_transfer_start(s, 512 * n, ide_sector_read);
|
| 2154 |
ide_set_irq(s); |
| 2155 |
ide_set_sector(s, sector_num + n); |
| 2156 |
s->nsector -= n; |
| 2157 |
} |
| 2158 |
} |
| 2159 |
|
| 2160 |
static void ide_sector_write(IDEState *s) |
| 2161 |
{
|
| 2162 |
int64_t sector_num; |
| 2163 |
int ret, n, n1;
|
| 2164 |
|
| 2165 |
s->status = READY_STAT | SEEK_STAT; |
| 2166 |
sector_num = ide_get_sector(s); |
| 2167 |
#if defined(DEBUG_IDE)
|
| 2168 |
printf("write sector=%Ld\n", sector_num);
|
| 2169 |
#endif
|
| 2170 |
n = s->nsector; |
| 2171 |
if (n > s->req_nb_sectors)
|
| 2172 |
n = s->req_nb_sectors; |
| 2173 |
ret = bdrv_write(s->bs, sector_num, s->io_buffer, n); |
| 2174 |
s->nsector -= n; |
| 2175 |
if (s->nsector == 0) { |
| 2176 |
/* no more sector to write */
|
| 2177 |
ide_transfer_stop(s); |
| 2178 |
} else {
|
| 2179 |
n1 = s->nsector; |
| 2180 |
if (n1 > s->req_nb_sectors)
|
| 2181 |
n1 = s->req_nb_sectors; |
| 2182 |
ide_transfer_start(s, 512 * n1, ide_sector_write);
|
| 2183 |
} |
| 2184 |
ide_set_sector(s, sector_num + n); |
| 2185 |
ide_set_irq(s); |
| 2186 |
} |
| 2187 |
|
| 2188 |
void ide_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 2189 |
{
|
| 2190 |
IDEState *s = ide_state[0].cur_drive;
|
| 2191 |
int unit, n;
|
| 2192 |
|
| 2193 |
addr &= 7;
|
| 2194 |
#ifdef DEBUG_IDE
|
| 2195 |
printf("IDE: write addr=0x%x val=0x%02x\n", addr, val);
|
| 2196 |
#endif
|
| 2197 |
switch(addr) {
|
| 2198 |
case 0: |
| 2199 |
break;
|
| 2200 |
case 1: |
| 2201 |
s->feature = val; |
| 2202 |
break;
|
| 2203 |
case 2: |
| 2204 |
if (val == 0) |
| 2205 |
val = 256;
|
| 2206 |
s->nsector = val; |
| 2207 |
break;
|
| 2208 |
case 3: |
| 2209 |
s->sector = val; |
| 2210 |
break;
|
| 2211 |
case 4: |
| 2212 |
s->lcyl = val; |
| 2213 |
break;
|
| 2214 |
case 5: |
| 2215 |
s->hcyl = val; |
| 2216 |
break;
|
| 2217 |
case 6: |
| 2218 |
/* select drive */
|
| 2219 |
unit = (val >> 4) & 1; |
| 2220 |
s = &ide_state[unit]; |
| 2221 |
ide_state[0].cur_drive = s;
|
| 2222 |
s->select = val; |
| 2223 |
break;
|
| 2224 |
default:
|
| 2225 |
case 7: |
| 2226 |
/* command */
|
| 2227 |
#if defined(DEBUG_IDE)
|
| 2228 |
printf("ide: CMD=%02x\n", val);
|
| 2229 |
#endif
|
| 2230 |
switch(val) {
|
| 2231 |
case WIN_PIDENTIFY:
|
| 2232 |
case WIN_IDENTIFY:
|
| 2233 |
if (s->bs) {
|
| 2234 |
ide_identify(s); |
| 2235 |
s->status = READY_STAT; |
| 2236 |
ide_transfer_start(s, 512, ide_transfer_stop);
|
| 2237 |
} else {
|
| 2238 |
ide_abort_command(s); |
| 2239 |
} |
| 2240 |
ide_set_irq(s); |
| 2241 |
break;
|
| 2242 |
case WIN_SPECIFY:
|
| 2243 |
case WIN_RECAL:
|
| 2244 |
s->status = READY_STAT; |
| 2245 |
ide_set_irq(s); |
| 2246 |
break;
|
| 2247 |
case WIN_SETMULT:
|
| 2248 |
if (s->nsector > MAX_MULT_SECTORS ||
|
| 2249 |
s->nsector == 0 ||
|
| 2250 |
(s->nsector & (s->nsector - 1)) != 0) { |
| 2251 |
ide_abort_command(s); |
| 2252 |
} else {
|
| 2253 |
s->mult_sectors = s->nsector; |
| 2254 |
s->status = READY_STAT; |
| 2255 |
} |
| 2256 |
ide_set_irq(s); |
| 2257 |
break;
|
| 2258 |
case WIN_READ:
|
| 2259 |
case WIN_READ_ONCE:
|
| 2260 |
s->req_nb_sectors = 1;
|
| 2261 |
ide_sector_read(s); |
| 2262 |
break;
|
| 2263 |
case WIN_WRITE:
|
| 2264 |
case WIN_WRITE_ONCE:
|
| 2265 |
s->status = SEEK_STAT; |
| 2266 |
s->req_nb_sectors = 1;
|
| 2267 |
ide_transfer_start(s, 512, ide_sector_write);
|
| 2268 |
break;
|
| 2269 |
case WIN_MULTREAD:
|
| 2270 |
if (!s->mult_sectors)
|
| 2271 |
goto abort_cmd;
|
| 2272 |
s->req_nb_sectors = s->mult_sectors; |
| 2273 |
ide_sector_read(s); |
| 2274 |
break;
|
| 2275 |
case WIN_MULTWRITE:
|
| 2276 |
if (!s->mult_sectors)
|
| 2277 |
goto abort_cmd;
|
| 2278 |
s->status = SEEK_STAT; |
| 2279 |
s->req_nb_sectors = s->mult_sectors; |
| 2280 |
n = s->nsector; |
| 2281 |
if (n > s->req_nb_sectors)
|
| 2282 |
n = s->req_nb_sectors; |
| 2283 |
ide_transfer_start(s, 512 * n, ide_sector_write);
|
| 2284 |
break;
|
| 2285 |
default:
|
| 2286 |
abort_cmd:
|
| 2287 |
ide_abort_command(s); |
| 2288 |
ide_set_irq(s); |
| 2289 |
break;
|
| 2290 |
} |
| 2291 |
} |
| 2292 |
} |
| 2293 |
|
| 2294 |
uint32_t ide_ioport_read(CPUX86State *env, uint32_t addr) |
| 2295 |
{
|
| 2296 |
IDEState *s = ide_state[0].cur_drive;
|
| 2297 |
int ret;
|
| 2298 |
|
| 2299 |
addr &= 7;
|
| 2300 |
switch(addr) {
|
| 2301 |
case 0: |
| 2302 |
ret = 0xff;
|
| 2303 |
break;
|
| 2304 |
case 1: |
| 2305 |
ret = s->error; |
| 2306 |
break;
|
| 2307 |
case 2: |
| 2308 |
ret = s->nsector & 0xff;
|
| 2309 |
break;
|
| 2310 |
case 3: |
| 2311 |
ret = s->sector; |
| 2312 |
break;
|
| 2313 |
case 4: |
| 2314 |
ret = s->lcyl; |
| 2315 |
break;
|
| 2316 |
case 5: |
| 2317 |
ret = s->hcyl; |
| 2318 |
break;
|
| 2319 |
case 6: |
| 2320 |
ret = s->select; |
| 2321 |
break;
|
| 2322 |
default:
|
| 2323 |
case 7: |
| 2324 |
ret = s->status; |
| 2325 |
pic_set_irq(s->irq, 0);
|
| 2326 |
break;
|
| 2327 |
} |
| 2328 |
#ifdef DEBUG_IDE
|
| 2329 |
printf("ide: read addr=0x%x val=%02x\n", addr, ret);
|
| 2330 |
#endif
|
| 2331 |
return ret;
|
| 2332 |
} |
| 2333 |
|
| 2334 |
uint32_t ide_status_read(CPUX86State *env, uint32_t addr) |
| 2335 |
{
|
| 2336 |
IDEState *s = ide_state[0].cur_drive;
|
| 2337 |
int ret;
|
| 2338 |
ret = s->status; |
| 2339 |
#ifdef DEBUG_IDE
|
| 2340 |
printf("ide: read addr=0x%x val=%02x\n", addr, ret);
|
| 2341 |
#endif
|
| 2342 |
return ret;
|
| 2343 |
} |
| 2344 |
|
| 2345 |
void ide_cmd_write(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 2346 |
{
|
| 2347 |
IDEState *s = &ide_state[0];
|
| 2348 |
/* common for both drives */
|
| 2349 |
s->cmd = val; |
| 2350 |
} |
| 2351 |
|
| 2352 |
void ide_data_writew(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 2353 |
{
|
| 2354 |
IDEState *s = ide_state[0].cur_drive;
|
| 2355 |
uint8_t *p; |
| 2356 |
|
| 2357 |
p = s->data_ptr; |
| 2358 |
*(uint16_t *)p = tswap16(val); |
| 2359 |
p += 2;
|
| 2360 |
s->data_ptr = p; |
| 2361 |
if (p >= s->data_end)
|
| 2362 |
s->end_transfer_func(s); |
| 2363 |
} |
| 2364 |
|
| 2365 |
uint32_t ide_data_readw(CPUX86State *env, uint32_t addr) |
| 2366 |
{
|
| 2367 |
IDEState *s = ide_state[0].cur_drive;
|
| 2368 |
uint8_t *p; |
| 2369 |
int ret;
|
| 2370 |
|
| 2371 |
p = s->data_ptr; |
| 2372 |
ret = tswap16(*(uint16_t *)p); |
| 2373 |
p += 2;
|
| 2374 |
s->data_ptr = p; |
| 2375 |
if (p >= s->data_end)
|
| 2376 |
s->end_transfer_func(s); |
| 2377 |
return ret;
|
| 2378 |
} |
| 2379 |
|
| 2380 |
void ide_data_writel(CPUX86State *env, uint32_t addr, uint32_t val)
|
| 2381 |
{
|
| 2382 |
IDEState *s = ide_state[0].cur_drive;
|
| 2383 |
uint8_t *p; |
| 2384 |
|
| 2385 |
p = s->data_ptr; |
| 2386 |
*(uint32_t *)p = tswap32(val); |
| 2387 |
p += 4;
|
| 2388 |
s->data_ptr = p; |
| 2389 |
if (p >= s->data_end)
|
| 2390 |
s->end_transfer_func(s); |
| 2391 |
} |
| 2392 |
|
| 2393 |
uint32_t ide_data_readl(CPUX86State *env, uint32_t addr) |
| 2394 |
{
|
| 2395 |
IDEState *s = ide_state[0].cur_drive;
|
| 2396 |
uint8_t *p; |
| 2397 |
int ret;
|
| 2398 |
|
| 2399 |
p = s->data_ptr; |
| 2400 |
ret = tswap32(*(uint32_t *)p); |
| 2401 |
p += 4;
|
| 2402 |
s->data_ptr = p; |
| 2403 |
if (p >= s->data_end)
|
| 2404 |
s->end_transfer_func(s); |
| 2405 |
return ret;
|
| 2406 |
} |
| 2407 |
|
| 2408 |
void ide_reset(IDEState *s)
|
| 2409 |
{
|
| 2410 |
s->mult_sectors = MAX_MULT_SECTORS; |
| 2411 |
s->status = READY_STAT; |
| 2412 |
s->cur_drive = s; |
| 2413 |
s->select = 0xa0;
|
| 2414 |
} |
| 2415 |
|
| 2416 |
void ide_init(void) |
| 2417 |
{
|
| 2418 |
IDEState *s; |
| 2419 |
int i, cylinders;
|
| 2420 |
int64_t nb_sectors; |
| 2421 |
|
| 2422 |
for(i = 0; i < MAX_DISKS; i++) { |
| 2423 |
s = &ide_state[i]; |
| 2424 |
s->bs = bs_table[i]; |
| 2425 |
if (s->bs) {
|
| 2426 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 2427 |
cylinders = nb_sectors / (16 * 63); |
| 2428 |
if (cylinders > 16383) |
| 2429 |
cylinders = 16383;
|
| 2430 |
else if (cylinders < 2) |
| 2431 |
cylinders = 2;
|
| 2432 |
s->cylinders = cylinders; |
| 2433 |
s->heads = 16;
|
| 2434 |
s->sectors = 63;
|
| 2435 |
s->nb_sectors = nb_sectors; |
| 2436 |
} |
| 2437 |
s->irq = 14;
|
| 2438 |
ide_reset(s); |
| 2439 |
} |
| 2440 |
register_ioport_write(0x1f0, 8, ide_ioport_write, 1); |
| 2441 |
register_ioport_read(0x1f0, 8, ide_ioport_read, 1); |
| 2442 |
register_ioport_read(0x3f6, 1, ide_status_read, 1); |
| 2443 |
register_ioport_write(0x3f6, 1, ide_cmd_write, 1); |
| 2444 |
|
| 2445 |
/* data ports */
|
| 2446 |
register_ioport_write(0x1f0, 2, ide_data_writew, 2); |
| 2447 |
register_ioport_read(0x1f0, 2, ide_data_readw, 2); |
| 2448 |
register_ioport_write(0x1f0, 4, ide_data_writel, 4); |
| 2449 |
register_ioport_read(0x1f0, 4, ide_data_readl, 4); |
| 2450 |
} |
| 2451 |
|
| 2452 |
/***********************************************************/
|
| 2453 |
/* cpu signal handler */
|
| 2454 |
static void host_segv_handler(int host_signum, siginfo_t *info, |
| 2455 |
void *puc)
|
| 2456 |
{
|
| 2457 |
if (cpu_signal_handler(host_signum, info, puc))
|
| 2458 |
return;
|
| 2459 |
term_exit(); |
| 2460 |
abort(); |
| 2461 |
} |
| 2462 |
|
| 2463 |
static int timer_irq_pending; |
| 2464 |
static int timer_irq_count; |
| 2465 |
|
| 2466 |
static void host_alarm_handler(int host_signum, siginfo_t *info, |
| 2467 |
void *puc)
|
| 2468 |
{
|
| 2469 |
/* NOTE: since usually the OS asks a 100 Hz clock, there can be
|
| 2470 |
some drift between cpu_get_ticks() and the interrupt time. So
|
| 2471 |
we queue some interrupts to avoid missing some */
|
| 2472 |
timer_irq_count += pit_get_out_edges(&pit_channels[0]);
|
| 2473 |
if (timer_irq_count) {
|
| 2474 |
if (timer_irq_count > 2) |
| 2475 |
timer_irq_count = 2;
|
| 2476 |
timer_irq_count--; |
| 2477 |
/* just exit from the cpu to have a chance to handle timers */
|
| 2478 |
cpu_x86_interrupt(global_env, CPU_INTERRUPT_EXIT); |
| 2479 |
timer_irq_pending = 1;
|
| 2480 |
} |
| 2481 |
} |
| 2482 |
|
| 2483 |
/* main execution loop */
|
| 2484 |
|
| 2485 |
CPUState *cpu_gdbstub_get_env(void *opaque)
|
| 2486 |
{
|
| 2487 |
return global_env;
|
| 2488 |
} |
| 2489 |
|
| 2490 |
void main_loop(void *opaque) |
| 2491 |
{
|
| 2492 |
struct pollfd ufds[2], *pf, *serial_ufd, *net_ufd, *gdb_ufd; |
| 2493 |
int ret, n, timeout;
|
| 2494 |
uint8_t ch; |
| 2495 |
CPUState *env = global_env; |
| 2496 |
|
| 2497 |
for(;;) {
|
| 2498 |
|
| 2499 |
ret = cpu_x86_exec(env); |
| 2500 |
|
| 2501 |
/* if hlt instruction, we wait until the next IRQ */
|
| 2502 |
if (ret == EXCP_HLT)
|
| 2503 |
timeout = 10;
|
| 2504 |
else
|
| 2505 |
timeout = 0;
|
| 2506 |
/* poll any events */
|
| 2507 |
serial_ufd = NULL;
|
| 2508 |
pf = ufds; |
| 2509 |
if (!(serial_ports[0].lsr & UART_LSR_DR)) { |
| 2510 |
serial_ufd = pf; |
| 2511 |
pf->fd = 0;
|
| 2512 |
pf->events = POLLIN; |
| 2513 |
pf++; |
| 2514 |
} |
| 2515 |
net_ufd = NULL;
|
| 2516 |
if (net_fd > 0 && ne2000_can_receive(&ne2000_state)) { |
| 2517 |
net_ufd = pf; |
| 2518 |
pf->fd = net_fd; |
| 2519 |
pf->events = POLLIN; |
| 2520 |
pf++; |
| 2521 |
} |
| 2522 |
gdb_ufd = NULL;
|
| 2523 |
if (gdbstub_fd > 0) { |
| 2524 |
gdb_ufd = pf; |
| 2525 |
pf->fd = gdbstub_fd; |
| 2526 |
pf->events = POLLIN; |
| 2527 |
pf++; |
| 2528 |
} |
| 2529 |
|
| 2530 |
ret = poll(ufds, pf - ufds, timeout); |
| 2531 |
if (ret > 0) { |
| 2532 |
if (serial_ufd && (serial_ufd->revents & POLLIN)) {
|
| 2533 |
n = read(0, &ch, 1); |
| 2534 |
if (n == 1) { |
| 2535 |
serial_received_byte(&serial_ports[0], ch);
|
| 2536 |
} |
| 2537 |
} |
| 2538 |
if (net_ufd && (net_ufd->revents & POLLIN)) {
|
| 2539 |
uint8_t buf[MAX_ETH_FRAME_SIZE]; |
| 2540 |
|
| 2541 |
n = read(net_fd, buf, MAX_ETH_FRAME_SIZE); |
| 2542 |
if (n > 0) { |
| 2543 |
if (n < 60) { |
| 2544 |
memset(buf + n, 0, 60 - n); |
| 2545 |
n = 60;
|
| 2546 |
} |
| 2547 |
ne2000_receive(&ne2000_state, buf, n); |
| 2548 |
} |
| 2549 |
} |
| 2550 |
if (gdb_ufd && (gdb_ufd->revents & POLLIN)) {
|
| 2551 |
uint8_t buf[1];
|
| 2552 |
/* stop emulation if requested by gdb */
|
| 2553 |
n = read(gdbstub_fd, buf, 1);
|
| 2554 |
if (n == 1) |
| 2555 |
break;
|
| 2556 |
} |
| 2557 |
} |
| 2558 |
|
| 2559 |
/* timer IRQ */
|
| 2560 |
if (timer_irq_pending) {
|
| 2561 |
pic_set_irq(0, 1); |
| 2562 |
pic_set_irq(0, 0); |
| 2563 |
timer_irq_pending = 0;
|
| 2564 |
} |
| 2565 |
} |
| 2566 |
} |
| 2567 |
|
| 2568 |
void help(void) |
| 2569 |
{
|
| 2570 |
printf("Virtual Linux version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n" |
| 2571 |
"usage: vl [options] bzImage [kernel parameters...]\n"
|
| 2572 |
"\n"
|
| 2573 |
"'bzImage' is a Linux kernel image (PAGE_OFFSET must be defined\n"
|
| 2574 |
"to 0x90000000 in asm/page.h and arch/i386/vmlinux.lds)\n"
|
| 2575 |
"\n"
|
| 2576 |
"General options:\n"
|
| 2577 |
"-initrd file use 'file' as initial ram disk\n"
|
| 2578 |
"-hda file use 'file' as hard disk 0 image\n"
|
| 2579 |
"-hdb file use 'file' as hard disk 1 image\n"
|
| 2580 |
"-m megs set virtual RAM size to megs MB\n"
|
| 2581 |
"-n script set network init script [default=%s]\n"
|
| 2582 |
"\n"
|
| 2583 |
"Debug options:\n"
|
| 2584 |
"-s wait gdb connection to port %d\n"
|
| 2585 |
"-p port change gdb connection port\n"
|
| 2586 |
"-d output log in /tmp/vl.log\n"
|
| 2587 |
"\n"
|
| 2588 |
"During emulation, use C-a h to get terminal commands:\n",
|
| 2589 |
DEFAULT_NETWORK_SCRIPT, DEFAULT_GDBSTUB_PORT); |
| 2590 |
term_print_help(); |
| 2591 |
exit(1);
|
| 2592 |
} |
| 2593 |
|
| 2594 |
struct option long_options[] = {
|
| 2595 |
{ "initrd", 1, NULL, 0, },
|
| 2596 |
{ "hda", 1, NULL, 0, },
|
| 2597 |
{ "hdb", 1, NULL, 0, },
|
| 2598 |
{ NULL, 0, NULL, 0 },
|
| 2599 |
}; |
| 2600 |
|
| 2601 |
int main(int argc, char **argv) |
| 2602 |
{
|
| 2603 |
int c, ret, initrd_size, i, use_gdbstub, gdbstub_port, long_index;
|
| 2604 |
struct linux_params *params;
|
| 2605 |
struct sigaction act;
|
| 2606 |
struct itimerval itv;
|
| 2607 |
CPUX86State *env; |
| 2608 |
const char *tmpdir, *initrd_filename; |
| 2609 |
const char *hd_filename[MAX_DISKS]; |
| 2610 |
|
| 2611 |
/* we never want that malloc() uses mmap() */
|
| 2612 |
mallopt(M_MMAP_THRESHOLD, 4096 * 1024); |
| 2613 |
initrd_filename = NULL;
|
| 2614 |
for(i = 0; i < MAX_DISKS; i++) |
| 2615 |
hd_filename[i] = NULL;
|
| 2616 |
phys_ram_size = 32 * 1024 * 1024; |
| 2617 |
pstrcpy(network_script, sizeof(network_script), DEFAULT_NETWORK_SCRIPT);
|
| 2618 |
use_gdbstub = 0;
|
| 2619 |
gdbstub_port = DEFAULT_GDBSTUB_PORT; |
| 2620 |
for(;;) {
|
| 2621 |
c = getopt_long_only(argc, argv, "hm:dn:sp:", long_options, &long_index);
|
| 2622 |
if (c == -1) |
| 2623 |
break;
|
| 2624 |
switch(c) {
|
| 2625 |
case 0: |
| 2626 |
switch(long_index) {
|
| 2627 |
case 0: |
| 2628 |
initrd_filename = optarg; |
| 2629 |
break;
|
| 2630 |
case 1: |
| 2631 |
hd_filename[0] = optarg;
|
| 2632 |
break;
|
| 2633 |
case 2: |
| 2634 |
hd_filename[1] = optarg;
|
| 2635 |
break;
|
| 2636 |
} |
| 2637 |
break;
|
| 2638 |
case 'h': |
| 2639 |
help(); |
| 2640 |
break;
|
| 2641 |
case 'm': |
| 2642 |
phys_ram_size = atoi(optarg) * 1024 * 1024; |
| 2643 |
if (phys_ram_size <= 0) |
| 2644 |
help(); |
| 2645 |
if (phys_ram_size > PHYS_RAM_MAX_SIZE) {
|
| 2646 |
fprintf(stderr, "vl: at most %d MB RAM can be simulated\n",
|
| 2647 |
PHYS_RAM_MAX_SIZE / (1024 * 1024)); |
| 2648 |
exit(1);
|
| 2649 |
} |
| 2650 |
break;
|
| 2651 |
case 'd': |
| 2652 |
loglevel = 1;
|
| 2653 |
break;
|
| 2654 |
case 'n': |
| 2655 |
pstrcpy(network_script, sizeof(network_script), optarg);
|
| 2656 |
break;
|
| 2657 |
case 's': |
| 2658 |
use_gdbstub = 1;
|
| 2659 |
break;
|
| 2660 |
case 'p': |
| 2661 |
gdbstub_port = atoi(optarg); |
| 2662 |
break;
|
| 2663 |
} |
| 2664 |
} |
| 2665 |
if (optind >= argc)
|
| 2666 |
help(); |
| 2667 |
|
| 2668 |
/* init debug */
|
| 2669 |
setvbuf(stdout, NULL, _IOLBF, 0); |
| 2670 |
if (loglevel) {
|
| 2671 |
logfile = fopen(DEBUG_LOGFILE, "w");
|
| 2672 |
if (!logfile) {
|
| 2673 |
perror(DEBUG_LOGFILE); |
| 2674 |
_exit(1);
|
| 2675 |
} |
| 2676 |
setvbuf(logfile, NULL, _IOLBF, 0); |
| 2677 |
} |
| 2678 |
|
| 2679 |
/* open the virtual block devices */
|
| 2680 |
for(i = 0; i < MAX_DISKS; i++) { |
| 2681 |
if (hd_filename[i]) {
|
| 2682 |
bs_table[i] = bdrv_open(hd_filename[i]); |
| 2683 |
if (!bs_table[i]) {
|
| 2684 |
fprintf(stderr, "vl: could not open hard disk image '%s\n",
|
| 2685 |
hd_filename[i]); |
| 2686 |
exit(1);
|
| 2687 |
} |
| 2688 |
} |
| 2689 |
} |
| 2690 |
|
| 2691 |
/* init network tun interface */
|
| 2692 |
net_init(); |
| 2693 |
|
| 2694 |
/* init the memory */
|
| 2695 |
tmpdir = getenv("VLTMPDIR");
|
| 2696 |
if (!tmpdir)
|
| 2697 |
tmpdir = "/tmp";
|
| 2698 |
snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/vlXXXXXX", tmpdir); |
| 2699 |
if (mkstemp(phys_ram_file) < 0) { |
| 2700 |
fprintf(stderr, "Could not create temporary memory file '%s'\n",
|
| 2701 |
phys_ram_file); |
| 2702 |
exit(1);
|
| 2703 |
} |
| 2704 |
phys_ram_fd = open(phys_ram_file, O_CREAT | O_TRUNC | O_RDWR, 0600);
|
| 2705 |
if (phys_ram_fd < 0) { |
| 2706 |
fprintf(stderr, "Could not open temporary memory file '%s'\n",
|
| 2707 |
phys_ram_file); |
| 2708 |
exit(1);
|
| 2709 |
} |
| 2710 |
ftruncate(phys_ram_fd, phys_ram_size); |
| 2711 |
unlink(phys_ram_file); |
| 2712 |
phys_ram_base = mmap((void *)PHYS_RAM_BASE, phys_ram_size,
|
| 2713 |
PROT_WRITE | PROT_READ, MAP_SHARED | MAP_FIXED, |
| 2714 |
phys_ram_fd, 0);
|
| 2715 |
if (phys_ram_base == MAP_FAILED) {
|
| 2716 |
fprintf(stderr, "Could not map physical memory\n");
|
| 2717 |
exit(1);
|
| 2718 |
} |
| 2719 |
|
| 2720 |
/* now we can load the kernel */
|
| 2721 |
ret = load_kernel(argv[optind], phys_ram_base + KERNEL_LOAD_ADDR); |
| 2722 |
if (ret < 0) { |
| 2723 |
fprintf(stderr, "vl: could not load kernel '%s'\n", argv[optind]);
|
| 2724 |
exit(1);
|
| 2725 |
} |
| 2726 |
|
| 2727 |
/* load initrd */
|
| 2728 |
initrd_size = 0;
|
| 2729 |
if (initrd_filename) {
|
| 2730 |
initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR); |
| 2731 |
if (initrd_size < 0) { |
| 2732 |
fprintf(stderr, "vl: could not load initial ram disk '%s'\n",
|
| 2733 |
initrd_filename); |
| 2734 |
exit(1);
|
| 2735 |
} |
| 2736 |
} |
| 2737 |
|
| 2738 |
/* init kernel params */
|
| 2739 |
params = (void *)(phys_ram_base + KERNEL_PARAMS_ADDR);
|
| 2740 |
memset(params, 0, sizeof(struct linux_params)); |
| 2741 |
params->mount_root_rdonly = 0;
|
| 2742 |
params->cl_magic = 0xA33F;
|
| 2743 |
params->cl_offset = params->commandline - (uint8_t *)params; |
| 2744 |
params->alt_mem_k = (phys_ram_size / 1024) - 1024; |
| 2745 |
for(i = optind + 1; i < argc; i++) { |
| 2746 |
if (i != optind + 1) |
| 2747 |
pstrcat(params->commandline, sizeof(params->commandline), " "); |
| 2748 |
pstrcat(params->commandline, sizeof(params->commandline), argv[i]);
|
| 2749 |
} |
| 2750 |
params->loader_type = 0x01;
|
| 2751 |
if (initrd_size > 0) { |
| 2752 |
params->initrd_start = INITRD_LOAD_ADDR; |
| 2753 |
params->initrd_size = initrd_size; |
| 2754 |
} |
| 2755 |
params->orig_video_lines = 25;
|
| 2756 |
params->orig_video_cols = 80;
|
| 2757 |
|
| 2758 |
/* init basic PC hardware */
|
| 2759 |
init_ioports(); |
| 2760 |
register_ioport_write(0x80, 1, ioport80_write, 1); |
| 2761 |
|
| 2762 |
register_ioport_write(0x3d4, 2, vga_ioport_write, 1); |
| 2763 |
|
| 2764 |
cmos_init(); |
| 2765 |
pic_init(); |
| 2766 |
pit_init(); |
| 2767 |
serial_init(); |
| 2768 |
ne2000_init(); |
| 2769 |
ide_init(); |
| 2770 |
|
| 2771 |
/* setup cpu signal handlers for MMU / self modifying code handling */
|
| 2772 |
sigfillset(&act.sa_mask); |
| 2773 |
act.sa_flags = SA_SIGINFO; |
| 2774 |
act.sa_sigaction = host_segv_handler; |
| 2775 |
sigaction(SIGSEGV, &act, NULL);
|
| 2776 |
sigaction(SIGBUS, &act, NULL);
|
| 2777 |
|
| 2778 |
act.sa_sigaction = host_alarm_handler; |
| 2779 |
sigaction(SIGALRM, &act, NULL);
|
| 2780 |
|
| 2781 |
/* init CPU state */
|
| 2782 |
env = cpu_init(); |
| 2783 |
global_env = env; |
| 2784 |
cpu_single_env = env; |
| 2785 |
|
| 2786 |
/* setup basic memory access */
|
| 2787 |
env->cr[0] = 0x00000033; |
| 2788 |
cpu_x86_init_mmu(env); |
| 2789 |
|
| 2790 |
memset(params->idt_table, 0, sizeof(params->idt_table)); |
| 2791 |
|
| 2792 |
params->gdt_table[2] = 0x00cf9a000000ffffLL; /* KERNEL_CS */ |
| 2793 |
params->gdt_table[3] = 0x00cf92000000ffffLL; /* KERNEL_DS */ |
| 2794 |
|
| 2795 |
env->idt.base = (void *)params->idt_table;
|
| 2796 |
env->idt.limit = sizeof(params->idt_table) - 1; |
| 2797 |
env->gdt.base = (void *)params->gdt_table;
|
| 2798 |
env->gdt.limit = sizeof(params->gdt_table) - 1; |
| 2799 |
|
| 2800 |
cpu_x86_load_seg(env, R_CS, KERNEL_CS); |
| 2801 |
cpu_x86_load_seg(env, R_DS, KERNEL_DS); |
| 2802 |
cpu_x86_load_seg(env, R_ES, KERNEL_DS); |
| 2803 |
cpu_x86_load_seg(env, R_SS, KERNEL_DS); |
| 2804 |
cpu_x86_load_seg(env, R_FS, KERNEL_DS); |
| 2805 |
cpu_x86_load_seg(env, R_GS, KERNEL_DS); |
| 2806 |
|
| 2807 |
env->eip = KERNEL_LOAD_ADDR; |
| 2808 |
env->regs[R_ESI] = KERNEL_PARAMS_ADDR; |
| 2809 |
env->eflags = 0x2;
|
| 2810 |
|
| 2811 |
itv.it_interval.tv_sec = 0;
|
| 2812 |
itv.it_interval.tv_usec = 1000;
|
| 2813 |
itv.it_value.tv_sec = 0;
|
| 2814 |
itv.it_value.tv_usec = 10 * 1000; |
| 2815 |
setitimer(ITIMER_REAL, &itv, NULL);
|
| 2816 |
/* we probe the tick duration of the kernel to inform the user if
|
| 2817 |
the emulated kernel requested a too high timer frequency */
|
| 2818 |
getitimer(ITIMER_REAL, &itv); |
| 2819 |
pit_min_timer_count = ((uint64_t)itv.it_interval.tv_usec * PIT_FREQ) / |
| 2820 |
1000000;
|
| 2821 |
|
| 2822 |
if (use_gdbstub) {
|
| 2823 |
cpu_gdbstub(NULL, main_loop, gdbstub_port);
|
| 2824 |
} else {
|
| 2825 |
main_loop(NULL);
|
| 2826 |
} |
| 2827 |
return 0; |
| 2828 |
} |