ppc_chrp.c

xen虚拟机源代码安装包

/*
 * 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 VGABIOS_FILENAME "video.x"
#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 */

static int dbdma_mem_index;
static int cuda_mem_index;
static int ide0_mem_index = -1;
static int ide1_mem_index = -1;
static int openpic_mem_index = -1;
static int heathrow_pic_mem_index = -1;
static int macio_nvram_mem_index = -1;

/* 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,
};

/* macio style NVRAM device */
typedef struct MacIONVRAMState {
    uint8_t data[0x2000];
} MacIONVRAMState;

static void macio_nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
{
    MacIONVRAMState *s = opaque;
    addr = (addr >> 4) & 0x1fff;
    s->data[addr] = value;
    //    printf("macio_nvram_writeb %04x = %02x\n", addr, value);
}

static uint32_t macio_nvram_readb (void *opaque, target_phys_addr_t addr)
{
    MacIONVRAMState *s = opaque;
    uint32_t value;

    addr = (addr >> 4) & 0x1fff;
    value = s->data[addr];
    //    printf("macio_nvram_readb %04x = %02x\n", addr, value);
    return value;
}

static CPUWriteMemoryFunc *macio_nvram_write[] = {
    &macio_nvram_writeb,
    &macio_nvram_writeb,
    &macio_nvram_writeb,
};

static CPUReadMemoryFunc *macio_nvram_read[] = {
    &macio_nvram_readb,
    &macio_nvram_readb,
    &macio_nvram_readb,
};

static MacIONVRAMState *macio_nvram_init(void)
{
    MacIONVRAMState *s;
    s = qemu_mallocz(sizeof(MacIONVRAMState));
    if (!s)
        return NULL;
    macio_nvram_mem_index = cpu_register_io_memory(0, macio_nvram_read, 
                                                   macio_nvram_write, s);
    return s;
}

static void macio_map(PCIDevice *pci_dev, int region_num, 
                      uint32_t addr, uint32_t size, int type)
{
    if (heathrow_pic_mem_index >= 0) {
        cpu_register_physical_memory(addr + 0x00000, 0x1000, 
                                     heathrow_pic_mem_index);
    }
    cpu_register_physical_memory(addr + 0x08000, 0x1000, dbdma_mem_index);
    cpu_register_physical_memory(addr + 0x16000, 0x2000, cuda_mem_index);
    if (ide0_mem_index >= 0)
        cpu_register_physical_memory(addr + 0x1f000, 0x1000, ide0_mem_index);
    if (ide1_mem_index >= 0)
        cpu_register_physical_memory(addr + 0x20000, 0x1000, ide1_mem_index);
    if (openpic_mem_index >= 0) {
        cpu_register_physical_memory(addr + 0x40000, 0x40000, 
                                     openpic_mem_index);
    }
    if (macio_nvram_mem_index >= 0)
        cpu_register_physical_memory(addr + 0x60000, 0x20000, macio_nvram_mem_index);
}

static void macio_init(PCIBus *bus, int device_id)
{
    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] = device_id;
    d->config[0x03] = device_id >> 8;

    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);
}

/* UniN device */
static void unin_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
{
}

static uint32_t unin_readl (void *opaque, target_phys_addr_t addr)
{
    return 0;
}

static CPUWriteMemoryFunc *unin_write[] = {
    &unin_writel,
    &unin_writel,
    &unin_writel,
};

static CPUReadMemoryFunc *unin_read[] = {
    &unin_readl,
    &unin_readl,
    &unin_readl,
};

/* temporary frame buffer OSI calls for the video.x driver. The right
   solution is to modify the driver to use VGA PCI I/Os */
static int vga_osi_call(CPUState *env)
{
    static int vga_vbl_enabled;
    int linesize;
    
    //    printf("osi_call R5=%d\n", env->gpr[5]);

    /* same handler as PearPC, coming from the original MOL video
       driver. */
    switch(env->gpr[5]) {
    case 4:
        break;
    case 28: /* set_vmode */
        if (env->gpr[6] != 1 || env->gpr[7] != 0)
            env->gpr[3] = 1;
        else
            env->gpr[3] = 0;
        break;
    case 29: /* get_vmode_info */
        if (env->gpr[6] != 0) {
            if (env->gpr[6] != 1 || env->gpr[7] != 0) {
                env->gpr[3] = 1;
                break;
            }
        }
        env->gpr[3] = 0; 
        env->gpr[4] = (1 << 16) | 1; /* num_vmodes, cur_vmode */
        env->gpr[5] = (1 << 16) | 0; /* num_depths, cur_depth_mode */
        env->gpr[6] = (graphic_width << 16) | graphic_height; /* w, h */
        env->gpr[7] = 85 << 16; /* refresh rate */
        env->gpr[8] = (graphic_depth + 7) & ~7; /* depth (round to byte) */
        linesize = ((graphic_depth + 7) >> 3) * graphic_width;
        linesize = (linesize + 3) & ~3;
        env->gpr[9] = (linesize << 16) | 0; /* row_bytes, offset */
        break;
    case 31: /* set_video power */
        env->gpr[3] = 0;
        break;
    case 39: /* video_ctrl */
        if (env->gpr[6] == 0 || env->gpr[6] == 1)
            vga_vbl_enabled = env->gpr[6];
        env->gpr[3] = 0;
        break;
    case 47:
        break;
    case 59: /* set_color */
        /* R6 = index, R7 = RGB */
        env->gpr[3] = 0;
        break;
    case 64: /* get color */
        /* R6 = index */
        env->gpr[3] = 0; 
        break;
    case 116: /* set hwcursor */
        /* R6 = x, R7 = y, R8 = visible, R9 = data */
        break;
    default:
        fprintf(stderr, "unsupported OSI call R5=%08x\n", env->gpr[5]);
        break;
    }
    return 1; /* osi_call handled */
}

/* XXX: suppress that */
static void pic_irq_request(void *opaque, int level)
{
}

static uint8_t nvram_chksum(const uint8_t *buf, int n)
{
    int sum, i;
    sum = 0;
    for(i = 0; i < n; i++)
        sum += buf[i];
    return (sum & 0xff) + (sum >> 8);
}

/* set a free Mac OS NVRAM partition */
void pmac_format_nvram_partition(uint8_t *buf, int len)
{