integratorcp.c 17.7 KB
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/* 
 * ARM Integrator CP System emulation.
 *
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 * Copyright (c) 2005-2006 CodeSourcery.
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 * Written by Paul Brook
 *
 * This code is licenced under the GPL
 */

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#include "vl.h"
#include "arm_pic.h"
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#define KERNEL_ARGS_ADDR 0x100
#define KERNEL_LOAD_ADDR 0x00010000
#define INITRD_LOAD_ADDR 0x00800000

void DMA_run (void)
{
}

typedef struct {
    uint32_t flash_offset;
    uint32_t cm_osc;
    uint32_t cm_ctrl;
    uint32_t cm_lock;
    uint32_t cm_auxosc;
    uint32_t cm_sdram;
    uint32_t cm_init;
    uint32_t cm_flags;
    uint32_t cm_nvflags;
    uint32_t int_level;
    uint32_t irq_enabled;
    uint32_t fiq_enabled;
} integratorcm_state;

static uint8_t integrator_spd[128] = {
   128, 8, 4, 11, 9, 1, 64, 0,  2, 0xa0, 0xa0, 0, 0, 8, 0, 1,
   0xe, 4, 0x1c, 1, 2, 0x20, 0xc0, 0, 0, 0, 0, 0x30, 0x28, 0x30, 0x28, 0x40
};

static uint32_t integratorcm_read(void *opaque, target_phys_addr_t offset)
{
    integratorcm_state *s = (integratorcm_state *)opaque;
    offset -= 0x10000000;
    if (offset >= 0x100 && offset < 0x200) {
        /* CM_SPD */
        if (offset >= 0x180)
            return 0;
        return integrator_spd[offset >> 2];
    }
    switch (offset >> 2) {
    case 0: /* CM_ID */
        return 0x411a3001;
    case 1: /* CM_PROC */
        return 0;
    case 2: /* CM_OSC */
        return s->cm_osc;
    case 3: /* CM_CTRL */
        return s->cm_ctrl;
    case 4: /* CM_STAT */
        return 0x00100000;
    case 5: /* CM_LOCK */
        if (s->cm_lock == 0xa05f) {
            return 0x1a05f;
        } else {
            return s->cm_lock;
        }
    case 6: /* CM_LMBUSCNT */
        /* ??? High frequency timer.  */
        cpu_abort(cpu_single_env, "integratorcm_read: CM_LMBUSCNT");
    case 7: /* CM_AUXOSC */
        return s->cm_auxosc;
    case 8: /* CM_SDRAM */
        return s->cm_sdram;
    case 9: /* CM_INIT */
        return s->cm_init;
    case 10: /* CM_REFCT */
        /* ??? High frequency timer.  */
        cpu_abort(cpu_single_env, "integratorcm_read: CM_REFCT");
    case 12: /* CM_FLAGS */
        return s->cm_flags;
    case 14: /* CM_NVFLAGS */
        return s->cm_nvflags;
    case 16: /* CM_IRQ_STAT */
        return s->int_level & s->irq_enabled;
    case 17: /* CM_IRQ_RSTAT */
        return s->int_level;
    case 18: /* CM_IRQ_ENSET */
        return s->irq_enabled;
    case 20: /* CM_SOFT_INTSET */
        return s->int_level & 1;
    case 24: /* CM_FIQ_STAT */
        return s->int_level & s->fiq_enabled;
    case 25: /* CM_FIQ_RSTAT */
        return s->int_level;
    case 26: /* CM_FIQ_ENSET */
        return s->fiq_enabled;
    case 32: /* CM_VOLTAGE_CTL0 */
    case 33: /* CM_VOLTAGE_CTL1 */
    case 34: /* CM_VOLTAGE_CTL2 */
    case 35: /* CM_VOLTAGE_CTL3 */
        /* ??? Voltage control unimplemented.  */
        return 0;
    default:
        cpu_abort (cpu_single_env,
            "integratorcm_read: Unimplemented offset 0x%x\n", offset);
        return 0;
    }
}

static void integratorcm_do_remap(integratorcm_state *s, int flash)
{
    if (flash) {
        cpu_register_physical_memory(0, 0x100000, IO_MEM_RAM);
    } else {
        cpu_register_physical_memory(0, 0x100000, s->flash_offset | IO_MEM_RAM);
    }
    //??? tlb_flush (cpu_single_env, 1);
}

static void integratorcm_set_ctrl(integratorcm_state *s, uint32_t value)
{
    if (value & 8) {
        cpu_abort(cpu_single_env, "Board reset\n");
    }
    if ((s->cm_init ^ value) & 4) {
        integratorcm_do_remap(s, (value & 4) == 0);
    }
    if ((s->cm_init ^ value) & 1) {
        printf("Green LED %s\n", (value & 1) ? "on" : "off");
    }
    s->cm_init = (s->cm_init & ~ 5) | (value ^ 5);
}

static void integratorcm_update(integratorcm_state *s)
{
    /* ??? The CPU irq/fiq is raised when either the core module or base PIC
       are active.  */
    if (s->int_level & (s->irq_enabled | s->fiq_enabled))
        cpu_abort(cpu_single_env, "Core module interrupt\n");
}

static void integratorcm_write(void *opaque, target_phys_addr_t offset,
                               uint32_t value)
{
    integratorcm_state *s = (integratorcm_state *)opaque;
    offset -= 0x10000000;
    switch (offset >> 2) {
    case 2: /* CM_OSC */
        if (s->cm_lock == 0xa05f)
            s->cm_osc = value;
        break;
    case 3: /* CM_CTRL */
        integratorcm_set_ctrl(s, value);
        break;
    case 5: /* CM_LOCK */
        s->cm_lock = value & 0xffff;
        break;
    case 7: /* CM_AUXOSC */
        if (s->cm_lock == 0xa05f)
            s->cm_auxosc = value;
        break;
    case 8: /* CM_SDRAM */
        s->cm_sdram = value;
        break;
    case 9: /* CM_INIT */
        /* ??? This can change the memory bus frequency.  */
        s->cm_init = value;
        break;
    case 12: /* CM_FLAGSS */
        s->cm_flags |= value;
        break;
    case 13: /* CM_FLAGSC */
        s->cm_flags &= ~value;
        break;
    case 14: /* CM_NVFLAGSS */
        s->cm_nvflags |= value;
        break;
    case 15: /* CM_NVFLAGSS */
        s->cm_nvflags &= ~value;
        break;
    case 18: /* CM_IRQ_ENSET */
        s->irq_enabled |= value;
        integratorcm_update(s);
        break;
    case 19: /* CM_IRQ_ENCLR */
        s->irq_enabled &= ~value;
        integratorcm_update(s);
        break;
    case 20: /* CM_SOFT_INTSET */
        s->int_level |= (value & 1);
        integratorcm_update(s);
        break;
    case 21: /* CM_SOFT_INTCLR */
        s->int_level &= ~(value & 1);
        integratorcm_update(s);
        break;
    case 26: /* CM_FIQ_ENSET */
        s->fiq_enabled |= value;
        integratorcm_update(s);
        break;
    case 27: /* CM_FIQ_ENCLR */
        s->fiq_enabled &= ~value;
        integratorcm_update(s);
        break;
    case 32: /* CM_VOLTAGE_CTL0 */
    case 33: /* CM_VOLTAGE_CTL1 */
    case 34: /* CM_VOLTAGE_CTL2 */
    case 35: /* CM_VOLTAGE_CTL3 */
        /* ??? Voltage control unimplemented.  */
        break;
    default:
        cpu_abort (cpu_single_env,
            "integratorcm_write: Unimplemented offset 0x%x\n", offset);
        break;
    }
}

/* Integrator/CM control registers.  */

static CPUReadMemoryFunc *integratorcm_readfn[] = {
   integratorcm_read,
   integratorcm_read,
   integratorcm_read
};

static CPUWriteMemoryFunc *integratorcm_writefn[] = {
   integratorcm_write,
   integratorcm_write,
   integratorcm_write
};

static void integratorcm_init(int memsz, uint32_t flash_offset)
{
    int iomemtype;
    integratorcm_state *s;

    s = (integratorcm_state *)qemu_mallocz(sizeof(integratorcm_state));
    s->cm_osc = 0x01000048;
    /* ??? What should the high bits of this value be?  */
    s->cm_auxosc = 0x0007feff;
    s->cm_sdram = 0x00011122;
    if (memsz >= 256) {
        integrator_spd[31] = 64;
        s->cm_sdram |= 0x10;
    } else if (memsz >= 128) {
        integrator_spd[31] = 32;
        s->cm_sdram |= 0x0c;
    } else if (memsz >= 64) {
        integrator_spd[31] = 16;
        s->cm_sdram |= 0x08;
    } else if (memsz >= 32) {
        integrator_spd[31] = 4;
        s->cm_sdram |= 0x04;
    } else {
        integrator_spd[31] = 2;
    }
    memcpy(integrator_spd + 73, "QEMU-MEMORY", 11);
    s->cm_init = 0x00000112;
    s->flash_offset = flash_offset;

    iomemtype = cpu_register_io_memory(0, integratorcm_readfn,
                                       integratorcm_writefn, s);
    cpu_register_physical_memory(0x10000000, 0x007fffff, iomemtype);
    integratorcm_do_remap(s, 1);
    /* ??? Save/restore.  */
}

/* Integrator/CP hardware emulation.  */
/* Primary interrupt controller.  */

typedef struct icp_pic_state
{
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  arm_pic_handler handler;
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  uint32_t base;
  uint32_t level;
  uint32_t irq_enabled;
  uint32_t fiq_enabled;
  void *parent;
  int parent_irq;
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  int parent_fiq;
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} icp_pic_state;

static void icp_pic_update(icp_pic_state *s)
{
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    uint32_t flags;
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    if (s->parent_irq != -1) {
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        flags = (s->level & s->irq_enabled);
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        pic_set_irq_new(s->parent, s->parent_irq, flags != 0);
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    }
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    if (s->parent_fiq != -1) {
        flags = (s->level & s->fiq_enabled);
        pic_set_irq_new(s->parent, s->parent_fiq, flags != 0);
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    }
}

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static void icp_pic_set_irq(void *opaque, int irq, int level)
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{
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    icp_pic_state *s = (icp_pic_state *)opaque;
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    if (level)
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        s->level |= 1 << irq;
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    else
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        s->level &= ~(1 << irq);
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    icp_pic_update(s);
}

static uint32_t icp_pic_read(void *opaque, target_phys_addr_t offset)
{
    icp_pic_state *s = (icp_pic_state *)opaque;

    offset -= s->base;
    switch (offset >> 2) {
    case 0: /* IRQ_STATUS */
        return s->level & s->irq_enabled;
    case 1: /* IRQ_RAWSTAT */
        return s->level;
    case 2: /* IRQ_ENABLESET */
        return s->irq_enabled;
    case 4: /* INT_SOFTSET */
        return s->level & 1;
    case 8: /* FRQ_STATUS */
        return s->level & s->fiq_enabled;
    case 9: /* FRQ_RAWSTAT */
        return s->level;
    case 10: /* FRQ_ENABLESET */
        return s->fiq_enabled;
    case 3: /* IRQ_ENABLECLR */
    case 5: /* INT_SOFTCLR */
    case 11: /* FRQ_ENABLECLR */
    default:
        printf ("icp_pic_read: Bad register offset 0x%x\n", offset);
        return 0;
    }
}

static void icp_pic_write(void *opaque, target_phys_addr_t offset,
                          uint32_t value)
{
    icp_pic_state *s = (icp_pic_state *)opaque;
    offset -= s->base;

    switch (offset >> 2) {
    case 2: /* IRQ_ENABLESET */
        s->irq_enabled |= value;
        break;
    case 3: /* IRQ_ENABLECLR */
        s->irq_enabled &= ~value;
        break;
    case 4: /* INT_SOFTSET */
        if (value & 1)
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            pic_set_irq_new(s, 0, 1);
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        break;
    case 5: /* INT_SOFTCLR */
        if (value & 1)
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            pic_set_irq_new(s, 0, 0);
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        break;
    case 10: /* FRQ_ENABLESET */
        s->fiq_enabled |= value;
        break;
    case 11: /* FRQ_ENABLECLR */
        s->fiq_enabled &= ~value;
        break;
    case 0: /* IRQ_STATUS */
    case 1: /* IRQ_RAWSTAT */
    case 8: /* FRQ_STATUS */
    case 9: /* FRQ_RAWSTAT */
    default:
        printf ("icp_pic_write: Bad register offset 0x%x\n", offset);
        return;
    }
    icp_pic_update(s);
}

static CPUReadMemoryFunc *icp_pic_readfn[] = {
   icp_pic_read,
   icp_pic_read,
   icp_pic_read
};

static CPUWriteMemoryFunc *icp_pic_writefn[] = {
   icp_pic_write,
   icp_pic_write,
   icp_pic_write
};

static icp_pic_state *icp_pic_init(uint32_t base, void *parent,
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                                   int parent_irq, int parent_fiq)
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{
    icp_pic_state *s;
    int iomemtype;

    s = (icp_pic_state *)qemu_mallocz(sizeof(icp_pic_state));
    if (!s)
        return NULL;
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    s->handler = icp_pic_set_irq;
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    s->base = base;
    s->parent = parent;
    s->parent_irq = parent_irq;
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    s->parent_fiq = parent_fiq;
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    iomemtype = cpu_register_io_memory(0, icp_pic_readfn,
                                       icp_pic_writefn, s);
    cpu_register_physical_memory(base, 0x007fffff, iomemtype);
    /* ??? Save/restore.  */
    return s;
}

/* CP control registers.  */
typedef struct {
    uint32_t base;
} icp_control_state;

static uint32_t icp_control_read(void *opaque, target_phys_addr_t offset)
{
    icp_control_state *s = (icp_control_state *)opaque;
    offset -= s->base;
    switch (offset >> 2) {
    case 0: /* CP_IDFIELD */
        return 0x41034003;
    case 1: /* CP_FLASHPROG */
        return 0;
    case 2: /* CP_INTREG */
        return 0;
    case 3: /* CP_DECODE */
        return 0x11;
    default:
        cpu_abort (cpu_single_env, "icp_control_read: Bad offset %x\n", offset);
        return 0;
    }
}

static void icp_control_write(void *opaque, target_phys_addr_t offset,
                          uint32_t value)
{
    icp_control_state *s = (icp_control_state *)opaque;
    offset -= s->base;
    switch (offset >> 2) {
    case 1: /* CP_FLASHPROG */
    case 2: /* CP_INTREG */
    case 3: /* CP_DECODE */
        /* Nothing interesting implemented yet.  */
        break;
    default:
        cpu_abort (cpu_single_env, "icp_control_write: Bad offset %x\n", offset);
    }
}
static CPUReadMemoryFunc *icp_control_readfn[] = {
   icp_control_read,
   icp_control_read,
   icp_control_read
};

static CPUWriteMemoryFunc *icp_control_writefn[] = {
   icp_control_write,
   icp_control_write,
   icp_control_write
};

static void icp_control_init(uint32_t base)
{
    int iomemtype;
    icp_control_state *s;

    s = (icp_control_state *)qemu_mallocz(sizeof(icp_control_state));
    iomemtype = cpu_register_io_memory(0, icp_control_readfn,
                                       icp_control_writefn, s);
    cpu_register_physical_memory(base, 0x007fffff, iomemtype);
    s->base = base;
    /* ??? Save/restore.  */
}


/* The worlds second smallest bootloader.  Set r0-r2, then jump to kernel.  */
static uint32_t bootloader[] = {
  0xe3a00000, /* mov     r0, #0 */
  0xe3a01013, /* mov     r1, #0x13 */
  0xe3811c01, /* orr     r1, r1, #0x100 */
  0xe59f2000, /* ldr     r2, [pc, #0] */
  0xe59ff000, /* ldr     pc, [pc, #0] */
  0, /* Address of kernel args.  Set by integratorcp_init.  */
  0  /* Kernel entry point.  Set by integratorcp_init.  */
};

static void set_kernel_args(uint32_t ram_size, int initrd_size,
                            const char *kernel_cmdline)
{
    uint32_t *p;

    p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR);
    /* ATAG_CORE */
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    stl_raw(p++, 5);
    stl_raw(p++, 0x54410001);
    stl_raw(p++, 1);
    stl_raw(p++, 0x1000);
    stl_raw(p++, 0);
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    /* ATAG_MEM */
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    stl_raw(p++, 4);
    stl_raw(p++, 0x54410002);
    stl_raw(p++, ram_size);
    stl_raw(p++, 0);
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    if (initrd_size) {
        /* ATAG_INITRD2 */
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        stl_raw(p++, 4);
        stl_raw(p++, 0x54420005);
        stl_raw(p++, INITRD_LOAD_ADDR);
        stl_raw(p++, initrd_size);
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    }
    if (kernel_cmdline && *kernel_cmdline) {
        /* ATAG_CMDLINE */
        int cmdline_size;

        cmdline_size = strlen(kernel_cmdline);
        memcpy (p + 2, kernel_cmdline, cmdline_size + 1);
        cmdline_size = (cmdline_size >> 2) + 1;
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        stl_raw(p++, cmdline_size + 2);
        stl_raw(p++, 0x54410009);
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        p += cmdline_size;
    }
    /* ATAG_END */
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    stl_raw(p++, 0);
    stl_raw(p++, 0);
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}

/* Board init.  */

static void integratorcp_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,
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                     const char *initrd_filename, uint32_t cpuid)
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{
    CPUState *env;
    uint32_t bios_offset;
    icp_pic_state *pic;
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    void *cpu_pic;
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    int kernel_size;
    int initrd_size;
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    int n;
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    env = cpu_init();
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    cpu_arm_set_model(env, cpuid);
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    bios_offset = ram_size + vga_ram_size;
    /* ??? On a real system the first 1Mb is mapped as SSRAM or boot flash.  */
    /* ??? RAM shoud repeat to fill physical memory space.  */
    /* SDRAM at address zero*/
    cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);
    /* And again at address 0x80000000 */
    cpu_register_physical_memory(0x80000000, ram_size, IO_MEM_RAM);

    integratorcm_init(ram_size >> 20, bios_offset);
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    cpu_pic = arm_pic_init_cpu(env);
    pic = icp_pic_init(0x14000000, cpu_pic, ARM_PIC_CPU_IRQ, ARM_PIC_CPU_FIQ);
    icp_pic_init(0xca000000, pic, 26, -1);
    icp_pit_init(0x13000000, pic, 5);
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    pl011_init(0x16000000, pic, 1, serial_hds[0]);
    pl011_init(0x17000000, pic, 2, serial_hds[1]);
    icp_control_init(0xcb000000);
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    pl050_init(0x18000000, pic, 3, 0);
    pl050_init(0x19000000, pic, 4, 1);
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    if (nd_table[0].vlan) {
        if (nd_table[0].model == NULL
            || strcmp(nd_table[0].model, "smc91c111") == 0) {
            smc91c111_init(&nd_table[0], 0xc8000000, pic, 27);
        } else {
            fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);
            exit (1);
        }
    }
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    pl110_init(ds, 0xc0000000, pic, 22, 0);
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    /* Load the kernel.  */
    if (!kernel_filename) {
        fprintf(stderr, "Kernel image must be specified\n");
        exit(1);
    }
    kernel_size = load_image(kernel_filename,
                             phys_ram_base + KERNEL_LOAD_ADDR);
    if (kernel_size < 0) {
        fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
        exit(1);
    }
    if (initrd_filename) {
        initrd_size = load_image(initrd_filename,
                                 phys_ram_base + INITRD_LOAD_ADDR);
        if (initrd_size < 0) {
            fprintf(stderr, "qemu: could not load initrd '%s'\n",
                    initrd_filename);
            exit(1);
        }
    } else {
        initrd_size = 0;
    }
    bootloader[5] = KERNEL_ARGS_ADDR;
    bootloader[6] = KERNEL_LOAD_ADDR;
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    for (n = 0; n < sizeof(bootloader) / 4; n++)
        stl_raw(phys_ram_base + (n * 4), bootloader[n]);
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    set_kernel_args(ram_size, initrd_size, kernel_cmdline);
}

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static void integratorcp926_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)
{
    integratorcp_init(ram_size, vga_ram_size, boot_device, ds, fd_filename,
                      snapshot, kernel_filename, kernel_cmdline,
                      initrd_filename, ARM_CPUID_ARM926);
}

static void integratorcp1026_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)
{
    integratorcp_init(ram_size, vga_ram_size, boot_device, ds, fd_filename,
                      snapshot, kernel_filename, kernel_cmdline,
                      initrd_filename, ARM_CPUID_ARM1026);
}

QEMUMachine integratorcp926_machine = {
    "integratorcp926",
    "ARM Integrator/CP (ARM926EJ-S)",
    integratorcp926_init,
};

QEMUMachine integratorcp1026_machine = {
    "integratorcp1026",
    "ARM Integrator/CP (ARM1026EJ-S)",
    integratorcp1026_init,
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};