Archipelago » qemu

/*

 * Renesas SH7751R R2D-PLUS emulation

 *

 * Copyright (c) 2007 Magnus Damm

 * Copyright (c) 2008 Paul Mundt

 *

 * 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 "hw.h"

#include "sh.h"

#include "sysemu.h"

#include "boards.h"

#include "assert.h"

#define SDRAM_BASE 0x0c000000 /* Physical location of SDRAM: Area 3 */

#define SDRAM_SIZE 0x04000000

#define PA_POWOFF        0x30

#define PA_VERREG        0x32

#define PA_OUTPORT        0x36

typedef struct {

    target_phys_addr_t base;

    uint16_t bcr;

    uint16_t irlmon;

    uint16_t cfctl;

    uint16_t cfpow;

    uint16_t dispctl;

    uint16_t sdmpow;

    uint16_t rtcce;

    uint16_t pcicd;

    uint16_t voyagerrts;

    uint16_t cfrst;

    uint16_t admrts;

    uint16_t extrst;

    uint16_t cfcdintclr;

    uint16_t keyctlclr;

    uint16_t pad0;

    uint16_t pad1;

    uint16_t powoff;

    uint16_t verreg;

    uint16_t inport;

    uint16_t outport;

    uint16_t bverreg;

} r2d_fpga_t;

static uint32_t r2d_fpga_read(void *opaque, target_phys_addr_t addr)

{

    r2d_fpga_t *s = opaque;

    addr -= s->base;

    switch (addr) {

    case PA_OUTPORT:

        return s->outport;

    case PA_POWOFF:

        return s->powoff;

    case PA_VERREG:

        return 0x10;

    }

    return 0;

}

static void

r2d_fpga_write(void *opaque, target_phys_addr_t addr, uint32_t value)

{

    r2d_fpga_t *s = opaque;

    addr -= s->base;

    switch (addr) {

    case PA_OUTPORT:

        s->outport = value;

        break;

    case PA_POWOFF:

        s->powoff = value;

        break;

    case PA_VERREG:

        /* Discard writes */

        break;

    }

}

static uint32_t invalid_read(void *opaque, target_phys_addr_t addr)

{

    assert(0);

    return 0;

}

static void invalid_write(void *opaque, target_phys_addr_t addr,

                          uint32_t mem_value)

{

    assert(0);

}

static CPUReadMemoryFunc *r2d_fpga_readfn[] = {

    r2d_fpga_read,

    r2d_fpga_read,

    invalid_read,

};

static CPUWriteMemoryFunc *r2d_fpga_writefn[] = {

    r2d_fpga_write,

    r2d_fpga_write,

    invalid_write,

};

static void r2d_fpga_init(target_phys_addr_t base)

{

    int iomemtype;

    r2d_fpga_t *s;

    s = qemu_mallocz(sizeof(r2d_fpga_t));

    if (!s)

        return;

    s->base = base;

    iomemtype = cpu_register_io_memory(0, r2d_fpga_readfn,

                                       r2d_fpga_writefn, s);

    cpu_register_physical_memory(base, 0x40, iomemtype);

}

static void r2d_init(ram_addr_t ram_size, int vga_ram_size,

              const char *boot_device, DisplayState * ds,

              const char *kernel_filename, const char *kernel_cmdline,

              const char *initrd_filename, const char *cpu_model)

{

    CPUState *env;

    struct SH7750State *s;

    if (!cpu_model)

        cpu_model = "SH7751R";

    env = cpu_init(cpu_model);

    if (!env) {

        fprintf(stderr, "Unable to find CPU definition\n");

        exit(1);

    }

    /* Allocate memory space */

    cpu_register_physical_memory(SDRAM_BASE, SDRAM_SIZE, 0);

    /* Register peripherals */

    r2d_fpga_init(0x04000000);

    s = sh7750_init(env);

    /* Todo: register on board registers */

    {

      int kernel_size;

      kernel_size = load_image(kernel_filename, phys_ram_base);

      if (kernel_size < 0) {

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

        exit(1);

      }

      env->pc = SDRAM_BASE | 0xa0000000; /* Start from P2 area */

    }

}

QEMUMachine r2d_machine = {

    "r2d",

    "r2d-plus board",

    r2d_init,

    SDRAM_SIZE | RAMSIZE_FIXED

};