root / target-ppc / hw.c @ 97eb5b14
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/*
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* Hardware simulation for PPC target.
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* For now, this is only a 'minimal' collection of hacks needed to boot Linux.
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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> |
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#include <ctype.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <inttypes.h> |
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#include <unistd.h> |
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#include <time.h> |
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#include "cpu.h" |
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#include "vl.h" |
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//#define HARD_DEBUG_PPC_IO
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#define DEBUG_PPC_IO
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extern int loglevel; |
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extern FILE *logfile;
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#if defined (HARD_DEBUG_PPC_IO) && !defined (DEBUG_PPC_IO)
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#define DEBUG_PPC_IO
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#endif
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#if defined (HARD_DEBUG_PPC_IO)
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#define PPC_IO_DPRINTF(fmt, args...) \
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do { \
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if (loglevel > 0) { \ |
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fprintf(logfile, "%s: " fmt, __func__ , ##args); \ |
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} else { \
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printf("%s : " fmt, __func__ , ##args); \ |
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} \ |
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} while (0) |
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#elif defined (DEBUG_PPC_IO)
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#define PPC_IO_DPRINTF(fmt, args...) \
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do { \
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if (loglevel > 0) { \ |
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fprintf(logfile, "%s: " fmt, __func__ , ##args); \ |
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} \ |
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} while (0) |
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#else
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#define PPC_IO_DPRINTF(fmt, args...) do { } while (0) |
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#endif
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#if defined (USE_OPEN_FIRMWARE)
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#include "of.h" |
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#else
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#define NVRAM_SIZE 0x2000 |
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#endif
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/* IO ports emulation */
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#define PPC_IO_BASE 0x80000000 |
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static void PPC_io_writeb (uint32_t addr, uint32_t value) |
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{ |
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/* Don't polute serial port output */
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if ((addr < 0x800003F0 || addr > 0x80000400) && |
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(addr < 0x80000074 || addr > 0x80000077) && |
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(addr < 0x80000020 || addr > 0x80000021) && |
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(addr < 0x800000a0 || addr > 0x800000a1) && |
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(addr < 0x800001f0 || addr > 0x800001f7) && |
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(addr < 0x80000170 || addr > 0x80000177)) { |
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PPC_IO_DPRINTF("0x%08x => 0x%02x\n", addr - PPC_IO_BASE, value);
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} |
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cpu_outb(NULL, addr - PPC_IO_BASE, value);
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} |
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static uint32_t PPC_io_readb (uint32_t addr)
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{ |
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uint32_t ret = cpu_inb(NULL, addr - PPC_IO_BASE);
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if ((addr < 0x800003F0 || addr > 0x80000400) && |
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(addr < 0x80000074 || addr > 0x80000077) && |
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(addr < 0x80000020 || addr > 0x80000021) && |
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(addr < 0x800000a0 || addr > 0x800000a1) && |
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(addr < 0x800001f0 || addr > 0x800001f7) && |
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(addr < 0x80000170 || addr > 0x80000177) && |
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(addr < 0x8000060 || addr > 0x8000064)) { |
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// PPC_IO_DPRINTF("0x%08x <= 0x%02x\n", addr - PPC_IO_BASE, ret);
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} |
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return ret;
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} |
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static void PPC_io_writew (uint32_t addr, uint32_t value) |
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{ |
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if ((addr < 0x800001f0 || addr > 0x800001f7) && |
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(addr < 0x80000170 || addr > 0x80000177)) { |
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PPC_IO_DPRINTF("0x%08x => 0x%04x\n", addr - PPC_IO_BASE, value);
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} |
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cpu_outw(NULL, addr - PPC_IO_BASE, value);
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} |
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static uint32_t PPC_io_readw (uint32_t addr)
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{ |
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uint32_t ret = cpu_inw(NULL, addr - PPC_IO_BASE);
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if ((addr < 0x800001f0 || addr > 0x800001f7) && |
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(addr < 0x80000170 || addr > 0x80000177)) { |
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PPC_IO_DPRINTF("0x%08x <= 0x%04x\n", addr - PPC_IO_BASE, ret);
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} |
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return ret;
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} |
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static void PPC_io_writel (uint32_t addr, uint32_t value) |
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{ |
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PPC_IO_DPRINTF("0x%08x => 0x%08x\n", addr - PPC_IO_BASE, value);
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cpu_outl(NULL, addr - PPC_IO_BASE, value);
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} |
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static uint32_t PPC_io_readl (uint32_t addr)
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{ |
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uint32_t ret = cpu_inl(NULL, addr - PPC_IO_BASE);
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PPC_IO_DPRINTF("0x%08x <= 0x%08x\n", addr - PPC_IO_BASE, ret);
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return ret;
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} |
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static CPUWriteMemoryFunc *PPC_io_write[] = {
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&PPC_io_writeb, |
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&PPC_io_writew, |
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&PPC_io_writel, |
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}; |
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static CPUReadMemoryFunc *PPC_io_read[] = {
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&PPC_io_readb, |
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&PPC_io_readw, |
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&PPC_io_readl, |
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}; |
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uint32_t pic_intack_read(CPUState *env); |
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/* Read-only register (?) */
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static void _PPC_ioB_write (uint32_t addr, uint32_t value) |
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{ |
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PPC_IO_DPRINTF("0x%08x => 0x%08x\n", addr, value);
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} |
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static uint32_t _PPC_ioB_read (uint32_t addr)
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{ |
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uint32_t retval = 0;
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if (addr == 0xBFFFFFF0) |
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retval = pic_intack_read(NULL);
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PPC_IO_DPRINTF("0x%08x <= 0x%08x\n", addr, retval);
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return retval;
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} |
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static CPUWriteMemoryFunc *PPC_ioB_write[] = {
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&_PPC_ioB_write, |
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&_PPC_ioB_write, |
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&_PPC_ioB_write, |
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}; |
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static CPUReadMemoryFunc *PPC_ioB_read[] = {
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&_PPC_ioB_read, |
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&_PPC_ioB_read, |
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&_PPC_ioB_read, |
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}; |
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#if 0
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static CPUWriteMemoryFunc *PPC_io3_write[] = {
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&PPC_io3_writeb,
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&PPC_io3_writew,
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&PPC_io3_writel,
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};
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static CPUReadMemoryFunc *PPC_io3_read[] = {
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&PPC_io3_readb,
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&PPC_io3_readw,
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&PPC_io3_readl,
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};
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#endif
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/* Fake super-io ports for PREP platform (Intel 82378ZB) */
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static uint8_t PREP_fake_io[2]; |
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static uint8_t NVRAM_lock;
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static void PREP_io_write (CPUState *env, uint32_t addr, uint32_t val) |
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{ |
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PREP_fake_io[addr - 0x0398] = val;
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} |
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static uint32_t PREP_io_read (CPUState *env, uint32_t addr)
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{ |
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return PREP_fake_io[addr - 0x0398]; |
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} |
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static uint8_t syscontrol;
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static void PREP_io_800_writeb (CPUState *env, uint32_t addr, uint32_t val) |
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{ |
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switch (addr) {
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case 0x0092: |
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/* Special port 92 */
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/* Check soft reset asked */
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if (val & 0x80) { |
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printf("Soft reset asked... Stop emulation\n");
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abort(); |
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} |
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/* Check LE mode */
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if (val & 0x40) { |
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printf("Little Endian mode isn't supported (yet ?)\n");
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abort(); |
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} |
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break;
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case 0x0808: |
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/* Hardfile light register: don't care */
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break;
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case 0x0810: |
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/* Password protect 1 register */
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NVRAM_lock ^= 0x01;
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break;
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case 0x0812: |
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/* Password protect 2 register */
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NVRAM_lock ^= 0x02;
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break;
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case 0x0814: |
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/* L2 invalidate register: don't care */
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break;
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case 0x081C: |
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/* system control register */
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syscontrol = val; |
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break;
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case 0x0850: |
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/* I/O map type register */
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if (val & 0x80) { |
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printf("No support for non-continuous I/O map mode\n");
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abort(); |
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} |
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break;
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default:
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break;
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} |
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} |
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static uint32_t PREP_io_800_readb (CPUState *env, uint32_t addr)
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{ |
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uint32_t retval = 0xFF;
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switch (addr) {
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case 0x0092: |
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/* Special port 92 */
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retval = 0x40;
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break;
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case 0x080C: |
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/* Equipment present register:
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* no L2 cache
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* no upgrade processor
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* no cards in PCI slots
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* SCSI fuse is bad
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*/
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retval = 0xFC;
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break;
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case 0x0818: |
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/* Keylock */
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retval = 0x00;
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break;
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case 0x081C: |
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/* system control register
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* 7 - 6 / 1 - 0: L2 cache enable
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*/
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retval = syscontrol; |
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break;
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case 0x0823: |
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/* */
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retval = 0x03; /* no L2 cache */ |
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break;
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case 0x0850: |
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/* I/O map type register */
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retval = 0x00;
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break;
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default:
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break;
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} |
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return retval;
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} |
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/* M48T59 NVRAM/RTC emulation */
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static uint8_t NVRAM[NVRAM_SIZE];
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/* RTC */
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static time_t time_offset;
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time_t get_time (void)
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{ |
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return time(NULL) + time_offset; |
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} |
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void set_time_offset (time_t new_time)
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{ |
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time_t now = time(NULL);
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time_offset = new_time - now; |
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} |
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static void NVRAM_init (void) |
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{ |
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/* NVRAM header */
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/* 0x00: NVRAM size in kB */
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NVRAM[0x00] = (NVRAM_SIZE >> 12) & 0xFF; |
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NVRAM[0x01] = (NVRAM_SIZE >> 10) & 0xFF; |
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/* 0x02: NVRAM version */
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NVRAM[0x02] = 0x01; |
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/* 0x03: NVRAM revision */
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NVRAM[0x03] = 0x00; |
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/* 0x04: checksum 0 => OS area */
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/* 0x06: checksum of config area */
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/* 0x08: last OS */
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NVRAM[0x08] = 0x00; /* Unknown */ |
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/* 0x09: endian */
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NVRAM[0x09] = 'B'; |
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/* 0x0B: PM mode */
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NVRAM[0x0B] = 0x00; |
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/* Restart block description record */
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/* 0x0C: restart block version */
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NVRAM[0x0C] = 0x00; |
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NVRAM[0x0D] = 0x01; |
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/* 0x0E: restart block revision */
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NVRAM[0x0E] = 0x00; |
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NVRAM[0x0F] = 0x00; |
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/* 0x1C: checksum of restart block */
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/* 0x20: restart address */
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NVRAM[0x20] = 0x00; |
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NVRAM[0x21] = 0x00; |
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NVRAM[0x22] = 0x00; |
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NVRAM[0x23] = 0x00; |
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/* 0x24: save area address */
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NVRAM[0x24] = 0x00; |
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NVRAM[0x25] = 0x00; |
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NVRAM[0x26] = 0x00; |
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NVRAM[0x27] = 0x00; |
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/* 0x28: save area length */
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NVRAM[0x28] = 0x00; |
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NVRAM[0x29] = 0x00; |
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NVRAM[0x2A] = 0x00; |
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NVRAM[0x2B] = 0x00; |
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/* Security section */
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/* Set all to zero */
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/* 0xC4: pointer to global environment area */
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NVRAM[0xC4] = 0x00; |
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NVRAM[0xC5] = 0x00; |
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NVRAM[0xC6] = 0x01; |
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NVRAM[0xC7] = 0x00; |
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/* 0xC8: size of global environment area */
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NVRAM[0xC8] = 0x00; |
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NVRAM[0xC9] = 0x00; |
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NVRAM[0xCA] = 0x07; |
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NVRAM[0xCB] = 0x00; |
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/* 0xD4: pointer to configuration area */
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NVRAM[0xD4] = 0x00; |
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NVRAM[0xD5] = 0x00; |
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NVRAM[0xD6] = 0x08; |
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NVRAM[0xD7] = 0x00; |
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/* 0xD8: size of configuration area */
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NVRAM[0xD8] = 0x00; |
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NVRAM[0xD9] = 0x00; |
367 |
NVRAM[0xDA] = 0x08; |
368 |
NVRAM[0xDB] = 0x00; |
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/* 0xE8: pointer to OS specific area */
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NVRAM[0xE8] = 0x00; |
371 |
NVRAM[0xE9] = 0x00; |
372 |
NVRAM[0xEA] = 0x10; |
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NVRAM[0xEB] = 0x00; |
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/* 0xD8: size of OS specific area */
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NVRAM[0xEC] = 0x00; |
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NVRAM[0xED] = 0x00; |
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NVRAM[0xEE] = 0x0F; |
378 |
NVRAM[0xEF] = 0xF0; |
379 |
/* CRC */
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/* RTC init */
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NVRAM[0x1FFC] = 0x50; |
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} |
383 |
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static uint16_t NVRAM_addr;
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/* Direct access to NVRAM */
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void NVRAM_write (CPUState *env, uint32_t addr, uint32_t val)
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{ |
389 |
switch (addr) {
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case 0x1FF0: |
391 |
/* flags register */
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break;
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case 0x1FF1: |
394 |
/* unused */
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break;
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case 0x1FF2: |
397 |
/* alarm seconds */
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break;
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399 |
case 0x1FF3: |
400 |
/* alarm minutes */
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break;
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402 |
case 0x1FF4: |
403 |
/* alarm hours */
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break;
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405 |
case 0x1FF5: |
406 |
/* alarm date */
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407 |
break;
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408 |
case 0x1FF6: |
409 |
/* interrupts */
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410 |
break;
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411 |
case 0x1FF7: |
412 |
/* watchdog */
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413 |
break;
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414 |
case 0x1FF8: |
415 |
/* control */
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416 |
break;
|
417 |
case 0x1FF9: |
418 |
/* seconds (BCD) */
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419 |
break;
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420 |
case 0x1FFA: |
421 |
/* minutes (BCD) */
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422 |
break;
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423 |
case 0x1FFB: |
424 |
/* hours (BCD) */
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425 |
break;
|
426 |
case 0x1FFC: |
427 |
/* day of the week / century */
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428 |
NVRAM[0x1FFC] = val & 0x50; |
429 |
break;
|
430 |
case 0x1FFD: |
431 |
/* date */
|
432 |
break;
|
433 |
case 0x1FFE: |
434 |
/* month */
|
435 |
break;
|
436 |
case 0x1FFF: |
437 |
/* year */
|
438 |
break;
|
439 |
default:
|
440 |
if (addr < NVRAM_SIZE)
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441 |
NVRAM[addr] = val & 0xFF;
|
442 |
break;
|
443 |
} |
444 |
} |
445 |
|
446 |
uint32_t NVRAM_read (CPUState *env, uint32_t addr) |
447 |
{ |
448 |
struct tm tm;
|
449 |
time_t t; |
450 |
uint32_t retval = 0xFF;
|
451 |
|
452 |
switch (addr) {
|
453 |
case 0x1FF0: |
454 |
/* flags register */
|
455 |
break;
|
456 |
case 0x1FF1: |
457 |
/* unused */
|
458 |
break;
|
459 |
case 0x1FF2: |
460 |
/* alarm seconds */
|
461 |
break;
|
462 |
case 0x1FF3: |
463 |
/* alarm minutes */
|
464 |
break;
|
465 |
case 0x1FF4: |
466 |
/* alarm hours */
|
467 |
break;
|
468 |
case 0x1FF5: |
469 |
/* alarm date */
|
470 |
break;
|
471 |
case 0x1FF6: |
472 |
/* interrupts */
|
473 |
break;
|
474 |
case 0x1FF7: |
475 |
/* watchdog */
|
476 |
break;
|
477 |
case 0x1FF8: |
478 |
/* control */
|
479 |
break;
|
480 |
case 0x1FF9: |
481 |
/* seconds (BCD) */
|
482 |
t = get_time(); |
483 |
localtime_r(&t, &tm); |
484 |
retval = ((tm.tm_sec / 10) << 4) | (tm.tm_sec % 10); |
485 |
// printf("return seconds=%d\n", tm.tm_sec);
|
486 |
break;
|
487 |
case 0x1FFA: |
488 |
/* minutes (BCD) */
|
489 |
t = get_time(); |
490 |
localtime_r(&t, &tm); |
491 |
retval = ((tm.tm_min / 10) << 4) | (tm.tm_min % 10); |
492 |
break;
|
493 |
case 0x1FFB: |
494 |
/* hours (BCD) */
|
495 |
t = get_time(); |
496 |
localtime_r(&t, &tm); |
497 |
retval = ((tm.tm_hour / 10) << 4) | (tm.tm_hour % 10); |
498 |
break;
|
499 |
case 0x1FFC: |
500 |
/* day of the week / century */
|
501 |
t = get_time(); |
502 |
localtime_r(&t, &tm); |
503 |
retval = (NVRAM[0x1FFC] & 0x50) | tm.tm_wday; |
504 |
break;
|
505 |
case 0x1FFD: |
506 |
/* date */
|
507 |
t = get_time(); |
508 |
localtime_r(&t, &tm); |
509 |
retval = ((tm.tm_mday / 10) << 4) | (tm.tm_mday % 10); |
510 |
break;
|
511 |
case 0x1FFE: |
512 |
/* month */
|
513 |
t = get_time(); |
514 |
localtime_r(&t, &tm); |
515 |
retval = ((tm.tm_mon / 10) << 4) | (tm.tm_mon % 10); |
516 |
break;
|
517 |
case 0x1FFF: |
518 |
/* year */
|
519 |
t = get_time(); |
520 |
localtime_r(&t, &tm); |
521 |
retval = ((tm.tm_year / 10) << 4) | (tm.tm_year % 10); |
522 |
break;
|
523 |
default:
|
524 |
if (NVRAM_addr < NVRAM_SIZE)
|
525 |
retval = NVRAM[NVRAM_addr]; |
526 |
break;
|
527 |
} |
528 |
|
529 |
return retval;
|
530 |
} |
531 |
|
532 |
/* IO access to NVRAM */
|
533 |
static void NVRAM_writeb (CPUState *env, uint32_t addr, uint32_t val) |
534 |
{ |
535 |
switch (addr) {
|
536 |
case 0x74: |
537 |
NVRAM_addr &= ~0x00FF;
|
538 |
NVRAM_addr |= val; |
539 |
break;
|
540 |
case 0x75: |
541 |
NVRAM_addr &= ~0xFF00;
|
542 |
NVRAM_addr |= val << 8;
|
543 |
break;
|
544 |
case 0x77: |
545 |
NVRAM_write(env, NVRAM_addr, val); |
546 |
NVRAM_addr = 0x0000;
|
547 |
break;
|
548 |
default:
|
549 |
break;
|
550 |
} |
551 |
} |
552 |
|
553 |
static uint32_t NVRAM_readb (CPUState *env, uint32_t addr)
|
554 |
{ |
555 |
if (addr == 0x77) |
556 |
return NVRAM_read(env, NVRAM_addr);
|
557 |
|
558 |
return 0xFF; |
559 |
} |
560 |
|
561 |
int load_initrd (const char *filename, uint8_t *addr) |
562 |
{ |
563 |
int fd, size;
|
564 |
|
565 |
printf("Load initrd\n");
|
566 |
fd = open(filename, O_RDONLY); |
567 |
if (fd < 0) |
568 |
return -1; |
569 |
size = read(fd, addr, 16 * 1024 * 1024); |
570 |
if (size < 0) |
571 |
goto fail;
|
572 |
close(fd); |
573 |
printf("Load initrd: %d\n", size);
|
574 |
return size;
|
575 |
fail:
|
576 |
close(fd); |
577 |
printf("Load initrd failed\n");
|
578 |
return -1; |
579 |
} |
580 |
|
581 |
/* Quick hack for PPC memory infos... */
|
582 |
static void put_long (void *addr, uint32_t l) |
583 |
{ |
584 |
char *pos = addr;
|
585 |
pos[0] = (l >> 24) & 0xFF; |
586 |
pos[1] = (l >> 16) & 0xFF; |
587 |
pos[2] = (l >> 8) & 0xFF; |
588 |
pos[3] = l & 0xFF; |
589 |
} |
590 |
|
591 |
/* bootloader infos are in the form:
|
592 |
* uint32_t TAG
|
593 |
* uint32_t TAG_size (from TAG to next TAG).
|
594 |
* datas
|
595 |
* ....
|
596 |
*/
|
597 |
#if !defined (USE_OPEN_FIRMWARE)
|
598 |
static void *set_bootinfo_tag (void *addr, uint32_t tag, uint32_t size, |
599 |
void *data)
|
600 |
{ |
601 |
char *pos = addr;
|
602 |
|
603 |
put_long(pos, tag); |
604 |
pos += 4;
|
605 |
put_long(pos, size + 8);
|
606 |
pos += 4;
|
607 |
memcpy(pos, data, size); |
608 |
pos += size; |
609 |
|
610 |
return pos;
|
611 |
} |
612 |
#endif
|
613 |
|
614 |
typedef struct boot_dev_t { |
615 |
const unsigned char *name; |
616 |
int major;
|
617 |
int minor;
|
618 |
} boot_dev_t; |
619 |
|
620 |
static boot_dev_t boot_devs[] =
|
621 |
{ |
622 |
{ "/dev/fd0", 2, 0, }, |
623 |
{ "/dev/fd1", 2, 1, }, |
624 |
{ "/dev/hda1", 3, 1, }, |
625 |
// { "/dev/ide/host0/bus0/target0/lun0/part1", 3, 1, },
|
626 |
{ "/dev/hdc", 22, 0, }, |
627 |
{ "/dev/ram0 init=/linuxrc", 1, 0, }, |
628 |
}; |
629 |
|
630 |
/* BATU:
|
631 |
* BEPI : bloc virtual address
|
632 |
* BL : area size bits (128 kB is 0, 256 1, 512 3, ...
|
633 |
* Vs/Vp
|
634 |
* BATL:
|
635 |
* BPRN : bloc real address align on 4MB boundary
|
636 |
* WIMG : cache access mode : not used
|
637 |
* PP : protection bits
|
638 |
*/
|
639 |
static void setup_BAT (CPUPPCState *env, int BAT, |
640 |
uint32_t virtual, uint32_t physical, |
641 |
uint32_t size, int Vs, int Vp, int PP) |
642 |
{ |
643 |
uint32_t sz_bits, tmp_sz, align, tmp; |
644 |
|
645 |
sz_bits = 0;
|
646 |
align = 131072;
|
647 |
for (tmp_sz = size / 131072; tmp_sz != 1; tmp_sz = tmp_sz >> 1) { |
648 |
sz_bits = (sz_bits << 1) + 1; |
649 |
align = align << 1;
|
650 |
} |
651 |
tmp = virtual & ~(align - 1); /* Align virtual area start */ |
652 |
tmp |= sz_bits << 2; /* Fix BAT size */ |
653 |
tmp |= Vs << 1; /* Supervisor access */ |
654 |
tmp |= Vp; /* User access */
|
655 |
env->DBAT[0][BAT] = tmp;
|
656 |
env->IBAT[0][BAT] = tmp;
|
657 |
tmp = physical & ~(align - 1); /* Align physical area start */ |
658 |
tmp |= 0; /* Don't care about WIMG */ |
659 |
tmp |= PP; /* Protection */
|
660 |
env->DBAT[1][BAT] = tmp;
|
661 |
env->IBAT[1][BAT] = tmp;
|
662 |
printf("Set BATU0 to 0x%08x BATL0 to 0x%08x\n",
|
663 |
env->DBAT[0][BAT], env->DBAT[1][BAT]); |
664 |
} |
665 |
|
666 |
static void VGA_printf (uint8_t *s) |
667 |
{ |
668 |
uint16_t *arg_ptr; |
669 |
unsigned int format_width, i; |
670 |
int in_format;
|
671 |
uint16_t arg, digit, nibble; |
672 |
uint8_t c; |
673 |
|
674 |
arg_ptr = (uint16_t *)(&s); |
675 |
in_format = 0;
|
676 |
format_width = 0;
|
677 |
while ((c = *s) != '\0') { |
678 |
if (c == '%') { |
679 |
in_format = 1;
|
680 |
format_width = 0;
|
681 |
} else if (in_format) { |
682 |
if ((c >= '0') && (c <= '9')) { |
683 |
format_width = (format_width * 10) + (c - '0'); |
684 |
} else if (c == 'x') { |
685 |
arg_ptr++; // increment to next arg
|
686 |
arg = *arg_ptr; |
687 |
if (format_width == 0) |
688 |
format_width = 4;
|
689 |
digit = format_width - 1;
|
690 |
for (i = 0; i < format_width; i++) { |
691 |
nibble = (arg >> (4 * digit)) & 0x000f; |
692 |
if (nibble <= 9) |
693 |
PPC_io_writeb(PPC_IO_BASE + 0x500, nibble + '0'); |
694 |
else
|
695 |
PPC_io_writeb(PPC_IO_BASE + 0x500, nibble + 'A'); |
696 |
digit--; |
697 |
} |
698 |
in_format = 0;
|
699 |
} |
700 |
//else if (c == 'd') {
|
701 |
// in_format = 0;
|
702 |
// }
|
703 |
} else {
|
704 |
PPC_io_writeb(PPC_IO_BASE + 0x500, c);
|
705 |
} |
706 |
s++; |
707 |
} |
708 |
} |
709 |
|
710 |
static void VGA_init (void) |
711 |
{ |
712 |
/* Basic VGA init, inspired by plex86 VGAbios */
|
713 |
printf("Init VGA...\n");
|
714 |
/* switch to color mode and enable CPU access 480 lines */
|
715 |
PPC_io_writeb(PPC_IO_BASE + 0x3C2, 0xC3); |
716 |
/* more than 64k 3C4/04 */
|
717 |
PPC_io_writeb(PPC_IO_BASE + 0x3C4, 0x04); |
718 |
PPC_io_writeb(PPC_IO_BASE + 0x3C5, 0x02); |
719 |
VGA_printf("PPC VGA BIOS...\n");
|
720 |
} |
721 |
|
722 |
void PPC_init_hw (CPUPPCState *env, uint32_t mem_size,
|
723 |
uint32_t kernel_addr, uint32_t kernel_size, |
724 |
uint32_t stack_addr, int boot_device)
|
725 |
{ |
726 |
char *p;
|
727 |
#if !defined (USE_OPEN_FIRMWARE)
|
728 |
char *tmp;
|
729 |
uint32_t tmpi[2];
|
730 |
#endif
|
731 |
int PPC_io_memory;
|
732 |
|
733 |
#if defined (USE_OPEN_FIRMWARE)
|
734 |
setup_memory(env, mem_size); |
735 |
#endif
|
736 |
/* Register 64 kB of IO space */
|
737 |
PPC_io_memory = cpu_register_io_memory(0, PPC_io_read, PPC_io_write);
|
738 |
cpu_register_physical_memory(0x80000000, 0x10000, PPC_io_memory); |
739 |
/* Register fake IO ports for PREP */
|
740 |
register_ioport_read(0x398, 2, PREP_io_read, 1); |
741 |
register_ioport_write(0x398, 2, PREP_io_write, 1); |
742 |
/* System control ports */
|
743 |
register_ioport_write(0x0092, 0x1, PREP_io_800_writeb, 1); |
744 |
register_ioport_read(0x0800, 0x52, PREP_io_800_readb, 1); |
745 |
register_ioport_write(0x0800, 0x52, PREP_io_800_writeb, 1); |
746 |
/* PCI intack location */
|
747 |
PPC_io_memory = cpu_register_io_memory(0, PPC_ioB_read, PPC_ioB_write);
|
748 |
cpu_register_physical_memory(0xBFFFFFF0, 0x4, PPC_io_memory); |
749 |
/* NVRAM ports */
|
750 |
NVRAM_init(); |
751 |
register_ioport_read(0x0074, 0x04, NVRAM_readb, 1); |
752 |
register_ioport_write(0x0074, 0x04, NVRAM_writeb, 1); |
753 |
|
754 |
/* Fake bootloader */
|
755 |
env->nip = kernel_addr + (3 * sizeof(uint32_t)); |
756 |
/* Set up msr according to PREP specification */
|
757 |
msr_ee = 0;
|
758 |
msr_fp = 1;
|
759 |
msr_pr = 0; /* Start in supervisor mode */ |
760 |
msr_me = 1;
|
761 |
msr_fe0 = msr_fe1 = 0;
|
762 |
msr_ip = 0;
|
763 |
msr_ir = msr_dr = 1;
|
764 |
// msr_sf = 0;
|
765 |
msr_le = msr_ile = 0;
|
766 |
env->gpr[1] = stack_addr; /* Let's have a stack */ |
767 |
env->gpr[2] = 0; |
768 |
env->gpr[8] = kernel_addr;
|
769 |
/* There is a bug in 2.4 kernels:
|
770 |
* if a decrementer exception is pending when it enables msr_ee,
|
771 |
* it's not ready to handle it...
|
772 |
*/
|
773 |
env->decr = 0xFFFFFFFF;
|
774 |
p = (void *)(phys_ram_base + kernel_addr);
|
775 |
#if !defined (USE_OPEN_FIRMWARE)
|
776 |
/* Let's register the whole memory available only in supervisor mode */
|
777 |
setup_BAT(env, 0, 0x00000000, 0x00000000, mem_size, 1, 0, 2); |
778 |
/* Avoid open firmware init call (to get a console)
|
779 |
* This will make the kernel think we are a PREP machine...
|
780 |
*/
|
781 |
put_long(p, 0xdeadc0de);
|
782 |
/* Build a real stack room */
|
783 |
p = (void *)(phys_ram_base + stack_addr);
|
784 |
put_long(p, stack_addr); |
785 |
p -= 32;
|
786 |
env->gpr[1] -= 32; |
787 |
/* Pretend there are no residual data */
|
788 |
env->gpr[3] = 0; |
789 |
#if 1 |
790 |
{ |
791 |
int size;
|
792 |
env->gpr[4] = 0x00800000; |
793 |
size = load_initrd("initrd",
|
794 |
(void *)((uint32_t)phys_ram_base + env->gpr[4])); |
795 |
if (size < 0) { |
796 |
/* No initrd */
|
797 |
env->gpr[4] = env->gpr[5] = 0; |
798 |
} else {
|
799 |
env->gpr[5] = size;
|
800 |
boot_device = 'e';
|
801 |
} |
802 |
printf("Initrd loaded at 0x%08x (%d)\n", env->gpr[4], env->gpr[5]); |
803 |
} |
804 |
#else
|
805 |
env->gpr[4] = env->gpr[5] = 0; |
806 |
#endif
|
807 |
/* We have to put bootinfos after the BSS
|
808 |
* The BSS starts after the kernel end.
|
809 |
*/
|
810 |
#if 0
|
811 |
p = (void *)(((uint32_t)phys_ram_base + kernel_addr +
|
812 |
kernel_size + (1 << 20) - 1) & ~((1 << 20) - 1));
|
813 |
#else
|
814 |
p = (void *)((uint32_t)phys_ram_base + kernel_addr + 0x400000); |
815 |
#endif
|
816 |
if (loglevel > 0) { |
817 |
fprintf(logfile, "bootinfos: %p 0x%08x\n",
|
818 |
p, (uint32_t)p - (uint32_t)phys_ram_base); |
819 |
} else {
|
820 |
printf("bootinfos: %p 0x%08x\n",
|
821 |
p, (uint32_t)p - (uint32_t)phys_ram_base); |
822 |
} |
823 |
/* Command line: let's put it after bootinfos */
|
824 |
#if 0
|
825 |
sprintf(p + 0x1000, "console=ttyS0,9600 root=%02x%02x mem=%dM",
|
826 |
boot_devs[boot_device - 'a'].major,
|
827 |
boot_devs[boot_device - 'a'].minor,
|
828 |
phys_ram_size >> 20);
|
829 |
#else
|
830 |
sprintf(p + 0x1000, "console=ttyS0,9600 console=tty0 root=%s mem=%dM load_ramdisk=1", |
831 |
boot_devs[boot_device - 'a'].name,
|
832 |
phys_ram_size >> 20);
|
833 |
#endif
|
834 |
env->gpr[6] = (uint32_t)p + 0x1000 - (uint32_t)phys_ram_base; |
835 |
env->gpr[7] = env->gpr[6] + strlen(p + 0x1000); |
836 |
if (loglevel > 0) { |
837 |
fprintf(logfile, "cmdline: %p 0x%08x [%s]\n",
|
838 |
p + 0x1000, env->gpr[6], p + 0x1000); |
839 |
} else {
|
840 |
printf("cmdline: %p 0x%08x [%s]\n",
|
841 |
p + 0x1000, env->gpr[6], p + 0x1000); |
842 |
} |
843 |
/* BI_FIRST */
|
844 |
p = set_bootinfo_tag(p, 0x1010, 0, 0); |
845 |
/* BI_CMD_LINE */
|
846 |
p = set_bootinfo_tag(p, 0x1012, env->gpr[7] - env->gpr[6], |
847 |
(void *)(env->gpr[6] + (uint32_t)phys_ram_base)); |
848 |
/* BI_MEM_SIZE */
|
849 |
tmp = (void *)tmpi;
|
850 |
tmp[0] = (phys_ram_size >> 24) & 0xFF; |
851 |
tmp[1] = (phys_ram_size >> 16) & 0xFF; |
852 |
tmp[2] = (phys_ram_size >> 8) & 0xFF; |
853 |
tmp[3] = phys_ram_size & 0xFF; |
854 |
p = set_bootinfo_tag(p, 0x1017, 4, tmpi); |
855 |
/* BI_INITRD */
|
856 |
tmp[0] = (env->gpr[4] >> 24) & 0xFF; |
857 |
tmp[1] = (env->gpr[4] >> 16) & 0xFF; |
858 |
tmp[2] = (env->gpr[4] >> 8) & 0xFF; |
859 |
tmp[3] = env->gpr[4] & 0xFF; |
860 |
tmp[4] = (env->gpr[5] >> 24) & 0xFF; |
861 |
tmp[5] = (env->gpr[5] >> 16) & 0xFF; |
862 |
tmp[6] = (env->gpr[5] >> 8) & 0xFF; |
863 |
tmp[7] = env->gpr[5] & 0xFF; |
864 |
p = set_bootinfo_tag(p, 0x1014, 8, tmpi); |
865 |
/* BI_LAST */
|
866 |
p = set_bootinfo_tag(p, 0x1011, 0, 0); |
867 |
#else
|
868 |
/* Set up MMU:
|
869 |
* kernel is loaded at kernel_addr and wants to be seen at 0x01000000
|
870 |
*/
|
871 |
setup_BAT(env, 0, 0x01000000, kernel_addr, 0x00400000, 1, 0, 2); |
872 |
{ |
873 |
#if 0
|
874 |
uint32_t offset =
|
875 |
*((uint32_t *)((uint32_t)phys_ram_base + kernel_addr));
|
876 |
#else
|
877 |
uint32_t offset = 12;
|
878 |
#endif
|
879 |
env->nip = 0x01000000 | (kernel_addr + offset);
|
880 |
printf("Start address: 0x%08x\n", env->nip);
|
881 |
} |
882 |
env->gpr[1] = env->nip + (1 << 22); |
883 |
p = (void *)(phys_ram_base + stack_addr);
|
884 |
put_long(p - 32, stack_addr);
|
885 |
env->gpr[1] -= 32; |
886 |
printf("Kernel starts at 0x%08x stack 0x%08x\n", env->nip, env->gpr[1]); |
887 |
/* We want all lower address not to be translated */
|
888 |
setup_BAT(env, 1, 0x00000000, 0x00000000, 0x010000000, 1, 1, 2); |
889 |
/* We also need a BAT to access OF */
|
890 |
setup_BAT(env, 2, 0xFFFE0000, mem_size - 131072, 131072, 1, 0, 1); |
891 |
/* Setup OF entry point */
|
892 |
{ |
893 |
char *p;
|
894 |
p = (char *)phys_ram_base + mem_size - 131072; |
895 |
/* Special opcode to call OF */
|
896 |
*p++ = 0x18; *p++ = 0x00; *p++ = 0x00; *p++ = 0x02; |
897 |
/* blr */
|
898 |
*p++ = 0x4E; *p++ = 0x80; *p++ = 0x00; *p++ = 0x20; |
899 |
} |
900 |
env->gpr[5] = 0xFFFE0000; |
901 |
/* Register translations */
|
902 |
{ |
903 |
OF_transl_t translations[3] = {
|
904 |
{ 0x01000000, 0x00400000, kernel_addr, 0x00000002, }, |
905 |
{ 0x00000000, 0x01000000, 0x00000000, 0x00000002, }, |
906 |
{ 0xFFFE0000, 0x00020000, mem_size - (128 * 1024), |
907 |
0x00000001, },
|
908 |
}; |
909 |
OF_register_translations(3, translations);
|
910 |
} |
911 |
/* Quite artificial, for now */
|
912 |
OF_register_bus("isa", "isa"); |
913 |
OF_register_serial("isa", "serial", 4, 0x3f8); |
914 |
OF_register_stdio("serial", "serial"); |
915 |
/* Set up RTAS service */
|
916 |
RTAS_init(); |
917 |
/* Command line: let's put it just over the stack */
|
918 |
#if 1 |
919 |
sprintf(p, "console=ttyS0,9600 root=%02x%02x mem=%dM",
|
920 |
boot_devs[boot_device - 'a'].major,
|
921 |
boot_devs[boot_device - 'a'].minor,
|
922 |
phys_ram_size >> 20);
|
923 |
#else
|
924 |
sprintf(p, "console=ttyS0,9600 root=%s mem=%dM ne2000=0x300,9",
|
925 |
boot_devs[boot_device - 'a'].name,
|
926 |
phys_ram_size >> 20);
|
927 |
#endif
|
928 |
OF_register_bootargs(p); |
929 |
#endif
|
930 |
} |
931 |
|
932 |
void PPC_end_init (void) |
933 |
{ |
934 |
VGA_init(); |
935 |
} |