Archipelago » qemu

/* 

 * ARM Integrator CP System emulation.

 *

 * Copyright (c) 2005-2006 CodeSourcery.

 * Written by Paul Brook

 *

 * This code is licenced under the GPL

 */

#include "vl.h"

#include "arm_pic.h"

#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

{

  arm_pic_handler handler;

  uint32_t base;

  uint32_t level;

  uint32_t irq_enabled;

  uint32_t fiq_enabled;

  void *parent;

  int parent_irq;

  int parent_fiq;

} icp_pic_state;

static void icp_pic_update(icp_pic_state *s)

{

    uint32_t flags;

    if (s->parent_irq != -1) {

        flags = (s->level & s->irq_enabled);

        pic_set_irq_new(s->parent, s->parent_irq, flags != 0);

    }

    if (s->parent_fiq != -1) {

        flags = (s->level & s->fiq_enabled);

        pic_set_irq_new(s->parent, s->parent_fiq, flags != 0);

    }

}

static void icp_pic_set_irq(void *opaque, int irq, int level)

{

    icp_pic_state *s = (icp_pic_state *)opaque;

    if (level)

        s->level |= 1 << irq;

    else

        s->level &= ~(1 << irq);

    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)

            pic_set_irq_new(s, 0, 1);

        break;

    case 5: /* INT_SOFTCLR */

        if (value & 1)

            pic_set_irq_new(s, 0, 0);

        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,

                                   int parent_irq, int parent_fiq)

{

    icp_pic_state *s;

    int iomemtype;

    s = (icp_pic_state *)qemu_mallocz(sizeof(icp_pic_state));

    if (!s)

        return NULL;

    s->handler = icp_pic_set_irq;

    s->base = base;

    s->parent = parent;

    s->parent_irq = parent_irq;

    s->parent_fiq = parent_fiq;

    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 */

    stl_raw(p++, 5);

    stl_raw(p++, 0x54410001);

    stl_raw(p++, 1);

    stl_raw(p++, 0x1000);

    stl_raw(p++, 0);

    /* ATAG_MEM */

    stl_raw(p++, 4);

    stl_raw(p++, 0x54410002);

    stl_raw(p++, ram_size);

    stl_raw(p++, 0);

    if (initrd_size) {

        /* ATAG_INITRD2 */

        stl_raw(p++, 4);

        stl_raw(p++, 0x54420005);

        stl_raw(p++, INITRD_LOAD_ADDR);

        stl_raw(p++, initrd_size);

    }

    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;

        stl_raw(p++, cmdline_size + 2);

        stl_raw(p++, 0x54410009);

        p += cmdline_size;

    }

    /* ATAG_END */

    stl_raw(p++, 0);

    stl_raw(p++, 0);

}

/* 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,

                     const char *initrd_filename, uint32_t cpuid)

{

    CPUState *env;

    uint32_t bios_offset;

    icp_pic_state *pic;

    void *cpu_pic;

    int kernel_size;

    int initrd_size;

    int n;

    env = cpu_init();

    cpu_arm_set_model(env, cpuid);

    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);

    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);

    pl011_init(0x16000000, pic, 1, serial_hds[0]);

    pl011_init(0x17000000, pic, 2, serial_hds[1]);

    icp_control_init(0xcb000000);

    pl050_init(0x18000000, pic, 3, 0);

    pl050_init(0x19000000, pic, 4, 1);

    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);

        }

    }

    pl110_init(ds, 0xc0000000, pic, 22, 0);

    /* 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;

    for (n = 0; n < sizeof(bootloader) / 4; n++)

        stl_raw(phys_ram_base + (n * 4), bootloader[n]);

    set_kernel_args(ram_size, initrd_size, kernel_cmdline);

}

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,

};