Archipelago » qemu

/*

 * QEMU PPC CHRP/PMAC hardware System Emulator

 * 

 * Copyright (c) 2004 Fabrice Bellard

 * 

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include "vl.h"

#define BIOS_FILENAME "ppc_rom.bin"

#define NVRAM_SIZE        0x2000

#define KERNEL_LOAD_ADDR 0x01000000

#define INITRD_LOAD_ADDR 0x01800000

/* MacIO devices (mapped inside the MacIO address space): CUDA, DBDMA,

   NVRAM (not implemented).  */

static int dbdma_mem_index;

static int cuda_mem_index;

static int ide0_mem_index;

static int ide1_mem_index;

static int openpic_mem_index;

/* DBDMA: currently no op - should suffice right now */

static void dbdma_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)

{

    printf("%s: 0x%08x <= 0x%08x\n", __func__, addr, value);

}

static void dbdma_writew (void *opaque, target_phys_addr_t addr, uint32_t value)

{

}

static void dbdma_writel (void *opaque, target_phys_addr_t addr, uint32_t value)

{

}

static uint32_t dbdma_readb (void *opaque, target_phys_addr_t addr)

{

    printf("%s: 0x%08x => 0x00000000\n", __func__, addr);

    return 0;

}

static uint32_t dbdma_readw (void *opaque, target_phys_addr_t addr)

{

    return 0;

}

static uint32_t dbdma_readl (void *opaque, target_phys_addr_t addr)

{

    return 0;

}

static CPUWriteMemoryFunc *dbdma_write[] = {

    &dbdma_writeb,

    &dbdma_writew,

    &dbdma_writel,

};

static CPUReadMemoryFunc *dbdma_read[] = {

    &dbdma_readb,

    &dbdma_readw,

    &dbdma_readl,

};

static void macio_map(PCIDevice *pci_dev, int region_num, 

                      uint32_t addr, uint32_t size, int type)

{

    cpu_register_physical_memory(addr + 0x08000, 0x1000, dbdma_mem_index);

    cpu_register_physical_memory(addr + 0x16000, 0x2000, cuda_mem_index);

    cpu_register_physical_memory(addr + 0x1f000, 0x1000, ide0_mem_index);

    cpu_register_physical_memory(addr + 0x20000, 0x1000, ide1_mem_index);

    cpu_register_physical_memory(addr + 0x40000, 0x40000, openpic_mem_index);

}

static void macio_init(PCIBus *bus)

{

    PCIDevice *d;

    d = pci_register_device(bus, "macio", sizeof(PCIDevice),

                            -1, NULL, NULL);

    /* Note: this code is strongly inspirated from the corresponding code

       in PearPC */

    d->config[0x00] = 0x6b; // vendor_id

    d->config[0x01] = 0x10;

    d->config[0x02] = 0x22;

    d->config[0x03] = 0x00;

    d->config[0x0a] = 0x00; // class_sub = pci2pci

    d->config[0x0b] = 0xff; // class_base = bridge

    d->config[0x0e] = 0x00; // header_type

    d->config[0x3d] = 0x01; // interrupt on pin 1

    dbdma_mem_index = cpu_register_io_memory(0, dbdma_read, dbdma_write, NULL);

    pci_register_io_region(d, 0, 0x80000, 

                           PCI_ADDRESS_SPACE_MEM, macio_map);

}

/* PowerPC PREP hardware initialisation */

void ppc_chrp_init(int ram_size, int vga_ram_size, int boot_device,

                   DisplayState *ds, const char **fd_filename, int snapshot,

                   const char *kernel_filename, const char *kernel_cmdline,

                   const char *initrd_filename)

{

    char buf[1024];

    openpic_t *openpic;

    m48t59_t *nvram;

    int PPC_io_memory;

    int ret, linux_boot, i;

    unsigned long bios_offset;

    uint32_t kernel_base, kernel_size, initrd_base, initrd_size;

    PCIBus *pci_bus;

    linux_boot = (kernel_filename != NULL);

    /* allocate RAM */

    cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);

    /* allocate and load BIOS */

    bios_offset = ram_size + vga_ram_size;

    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, BIOS_FILENAME);

    ret = load_image(buf, phys_ram_base + bios_offset);

    if (ret != BIOS_SIZE) {

        fprintf(stderr, "qemu: could not load PPC PREP bios '%s'\n", buf);

        exit(1);

    }

    cpu_register_physical_memory((uint32_t)(-BIOS_SIZE), 

                                 BIOS_SIZE, bios_offset | IO_MEM_ROM);

    cpu_single_env->nip = 0xfffffffc;

    if (linux_boot) {

        kernel_base = KERNEL_LOAD_ADDR;

        /* now we can load the kernel */

        kernel_size = load_image(kernel_filename, phys_ram_base + kernel_base);

        if (kernel_size < 0) {

            fprintf(stderr, "qemu: could not load kernel '%s'\n", 

                    kernel_filename);

            exit(1);

        }

        /* load initrd */

        if (initrd_filename) {

            initrd_base = INITRD_LOAD_ADDR;

            initrd_size = load_image(initrd_filename,

                                     phys_ram_base + initrd_base);

            if (initrd_size < 0) {

                fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", 

                        initrd_filename);

                exit(1);

            }

        } else {

            initrd_base = 0;

            initrd_size = 0;

        }

        boot_device = 'm';

    } else {

        kernel_base = 0;

        kernel_size = 0;

        initrd_base = 0;

        initrd_size = 0;

    }

    /* Register CPU as a 74x/75x */

    cpu_ppc_register(cpu_single_env, 0x00080000);

    /* Set time-base frequency to 100 Mhz */

    cpu_ppc_tb_init(cpu_single_env, 100UL * 1000UL * 1000UL);

    isa_mem_base = 0x80000000;

    pci_bus = pci_pmac_init();

    /* Register 8 MB of ISA IO space */

    PPC_io_memory = cpu_register_io_memory(0, PPC_io_read, PPC_io_write, NULL);

    cpu_register_physical_memory(0xF2000000, 0x00800000, PPC_io_memory);

    /* init basic PC hardware */

    vga_initialize(pci_bus, ds, phys_ram_base + ram_size, ram_size, 

                   vga_ram_size);

    openpic = openpic_init(NULL, &openpic_mem_index, 1);

    pci_pmac_set_openpic(pci_bus, openpic);

    /* XXX: suppress that */

    pic_init();

    /* XXX: use Mac Serial port */

    serial_init(0x3f8, 4, serial_hds[0]);

    for(i = 0; i < nb_nics; i++) {

        pci_ne2000_init(pci_bus, &nd_table[i]);

    }

    ide0_mem_index = pmac_ide_init(&bs_table[0], openpic, 0x13);

    ide1_mem_index = pmac_ide_init(&bs_table[2], openpic, 0x13);

    /* cuda also initialize ADB */

    cuda_mem_index = cuda_init(openpic, 0x19);

    adb_kbd_init(&adb_bus);

    adb_mouse_init(&adb_bus);

    macio_init(pci_bus);

    nvram = m48t59_init(8, 0xFFF04000, 0x0074, NVRAM_SIZE);

    if (graphic_depth != 15 && graphic_depth != 32 && graphic_depth != 8)

        graphic_depth = 15;

    PPC_NVRAM_set_params(nvram, NVRAM_SIZE, "CHRP", ram_size, boot_device,

                         kernel_base, kernel_size,

                         kernel_cmdline,

                         initrd_base, initrd_size,

                         /* XXX: need an option to load a NVRAM image */

                         0,

                         graphic_width, graphic_height, graphic_depth);

    /* No PCI init: the BIOS will do it */

}