Archipelago » qemu

/*

 * QEMU MIPS Jazz support

 *

 * Copyright (c) 2007-2008 Hervé Poussineau

 *

 * 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 "mips.h"

#include "mips_cpudevs.h"

#include "pc.h"

#include "isa.h"

#include "fdc.h"

#include "sysemu.h"

#include "audio/audio.h"

#include "boards.h"

#include "net.h"

#include "esp.h"

#include "mips-bios.h"

#include "loader.h"

#include "mc146818rtc.h"

enum jazz_model_e

{

    JAZZ_MAGNUM,

    JAZZ_PICA61,

};

static void main_cpu_reset(void *opaque)

{

    CPUState *env = opaque;

    cpu_reset(env);

}

static uint32_t rtc_readb(void *opaque, target_phys_addr_t addr)

{

    return cpu_inw(0x71);

}

static void rtc_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)

{

    cpu_outw(0x71, val & 0xff);

}

static CPUReadMemoryFunc * const rtc_read[3] = {

    rtc_readb,

    rtc_readb,

    rtc_readb,

};

static CPUWriteMemoryFunc * const rtc_write[3] = {

    rtc_writeb,

    rtc_writeb,

    rtc_writeb,

};

static void dma_dummy_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)

{

    /* Nothing to do. That is only to ensure that

     * the current DMA acknowledge cycle is completed. */

}

static CPUReadMemoryFunc * const dma_dummy_read[3] = {

    NULL,

    NULL,

    NULL,

};

static CPUWriteMemoryFunc * const dma_dummy_write[3] = {

    dma_dummy_writeb,

    dma_dummy_writeb,

    dma_dummy_writeb,

};

#ifdef HAS_AUDIO

static void audio_init(qemu_irq *pic)

{

    struct soundhw *c;

    int audio_enabled = 0;

    for (c = soundhw; !audio_enabled && c->name; ++c) {

        audio_enabled = c->enabled;

    }

    if (audio_enabled) {

        for (c = soundhw; c->name; ++c) {

            if (c->enabled) {

                if (c->isa) {

                    c->init.init_isa(pic);

                }

            }

        }

    }

}

#endif

#define MAGNUM_BIOS_SIZE_MAX 0x7e000

#define MAGNUM_BIOS_SIZE (BIOS_SIZE < MAGNUM_BIOS_SIZE_MAX ? BIOS_SIZE : MAGNUM_BIOS_SIZE_MAX)

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

{

    CPUState *env = cpu_single_env;

    if (env && level) {

        cpu_exit(env);

    }

}

static

void mips_jazz_init (ram_addr_t ram_size,

                     const char *cpu_model,

                     enum jazz_model_e jazz_model)

{

    char *filename;

    int bios_size, n;

    CPUState *env;

    qemu_irq *rc4030, *i8259;

    rc4030_dma *dmas;

    void* rc4030_opaque;

    int s_rtc, s_dma_dummy;

    NICInfo *nd;

    PITState *pit;

    DriveInfo *fds[MAX_FD];

    qemu_irq esp_reset;

    qemu_irq *cpu_exit_irq;

    ram_addr_t ram_offset;

    ram_addr_t bios_offset;

    /* init CPUs */

    if (cpu_model == NULL) {

#ifdef TARGET_MIPS64

        cpu_model = "R4000";

#else

        /* FIXME: All wrong, this maybe should be R3000 for the older JAZZs. */

        cpu_model = "24Kf";

#endif

    }

    env = cpu_init(cpu_model);

    if (!env) {

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

        exit(1);

    }

    qemu_register_reset(main_cpu_reset, env);

    /* allocate RAM */

    ram_offset = qemu_ram_alloc(ram_size);

    cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);

    bios_offset = qemu_ram_alloc(MAGNUM_BIOS_SIZE);

    cpu_register_physical_memory(0x1fc00000LL,

                                 MAGNUM_BIOS_SIZE, bios_offset | IO_MEM_ROM);

    cpu_register_physical_memory(0xfff00000LL,

                                 MAGNUM_BIOS_SIZE, bios_offset | IO_MEM_ROM);

    /* load the BIOS image. */

    if (bios_name == NULL)

        bios_name = BIOS_FILENAME;

    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

    if (filename) {

        bios_size = load_image_targphys(filename, 0xfff00000LL,

                                        MAGNUM_BIOS_SIZE);

        qemu_free(filename);

    } else {

        bios_size = -1;

    }

    if (bios_size < 0 || bios_size > MAGNUM_BIOS_SIZE) {

        fprintf(stderr, "qemu: Could not load MIPS bios '%s'\n",

                bios_name);

        exit(1);

    }

    /* Init CPU internal devices */

    cpu_mips_irq_init_cpu(env);

    cpu_mips_clock_init(env);

    /* Chipset */

    rc4030_opaque = rc4030_init(env->irq[6], env->irq[3], &rc4030, &dmas);

    s_dma_dummy = cpu_register_io_memory(dma_dummy_read, dma_dummy_write, NULL);

    cpu_register_physical_memory(0x8000d000, 0x00001000, s_dma_dummy);

    /* ISA devices */

    i8259 = i8259_init(env->irq[4]);

    isa_bus_new(NULL);

    isa_bus_irqs(i8259);

    cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);

    DMA_init(0, cpu_exit_irq);

    pit = pit_init(0x40, i8259[0]);

    pcspk_init(pit);

    /* ISA IO space at 0x90000000 */

#ifdef TARGET_WORDS_BIGENDIAN

    isa_mmio_init(0x90000000, 0x01000000, 1);

#else

    isa_mmio_init(0x90000000, 0x01000000, 0);

#endif

    isa_mem_base = 0x11000000;

    /* Video card */

    switch (jazz_model) {

    case JAZZ_MAGNUM:

        g364fb_mm_init(0x40000000, 0x60000000, 0, rc4030[3]);

        break;

    case JAZZ_PICA61:

        isa_vga_mm_init(0x40000000, 0x60000000, 0);

        break;

    default:

        break;

    }

    /* Network controller */

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

        nd = &nd_table[n];

        if (!nd->model)

            nd->model = qemu_strdup("dp83932");

        if (strcmp(nd->model, "dp83932") == 0) {

            dp83932_init(nd, 0x80001000, 2, rc4030[4],

                         rc4030_opaque, rc4030_dma_memory_rw);

            break;

        } else if (strcmp(nd->model, "?") == 0) {

            fprintf(stderr, "qemu: Supported NICs: dp83932\n");

            exit(1);

        } else {

            fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd->model);

            exit(1);

        }

    }

    /* SCSI adapter */

    esp_init(0x80002000, 0,

             rc4030_dma_read, rc4030_dma_write, dmas[0],

             rc4030[5], &esp_reset);

    /* Floppy */

    if (drive_get_max_bus(IF_FLOPPY) >= MAX_FD) {

        fprintf(stderr, "qemu: too many floppy drives\n");

        exit(1);

    }

    for (n = 0; n < MAX_FD; n++) {

        fds[n] = drive_get(IF_FLOPPY, 0, n);

    }

    fdctrl_init_sysbus(rc4030[1], 0, 0x80003000, fds);

    /* Real time clock */

    rtc_init(1980, NULL);

    s_rtc = cpu_register_io_memory(rtc_read, rtc_write, NULL);

    cpu_register_physical_memory(0x80004000, 0x00001000, s_rtc);

    /* Keyboard (i8042) */

    i8042_mm_init(rc4030[6], rc4030[7], 0x80005000, 0x1000, 0x1);

    /* Serial ports */

    if (serial_hds[0]) {

#ifdef TARGET_WORDS_BIGENDIAN

        serial_mm_init(0x80006000, 0, rc4030[8], 8000000/16, serial_hds[0], 1, 1);

#else

        serial_mm_init(0x80006000, 0, rc4030[8], 8000000/16, serial_hds[0], 1, 0);

#endif

    }

    if (serial_hds[1]) {

#ifdef TARGET_WORDS_BIGENDIAN

        serial_mm_init(0x80007000, 0, rc4030[9], 8000000/16, serial_hds[1], 1, 1);

#else

        serial_mm_init(0x80007000, 0, rc4030[9], 8000000/16, serial_hds[1], 1, 0);

#endif

    }

    /* Parallel port */

    if (parallel_hds[0])

        parallel_mm_init(0x80008000, 0, rc4030[0], parallel_hds[0]);

    /* Sound card */

    /* FIXME: missing Jazz sound at 0x8000c000, rc4030[2] */

#ifdef HAS_AUDIO

    audio_init(i8259);

#endif

    /* NVRAM: Unprotected at 0x9000, Protected at 0xa000, Read only at 0xb000 */

    ds1225y_init(0x80009000, "nvram");

    /* LED indicator */

    jazz_led_init(0x8000f000);

}

static

void mips_magnum_init (ram_addr_t ram_size,

                       const char *boot_device,

                       const char *kernel_filename, const char *kernel_cmdline,

                       const char *initrd_filename, const char *cpu_model)

{

    mips_jazz_init(ram_size, cpu_model, JAZZ_MAGNUM);

}

static

void mips_pica61_init (ram_addr_t ram_size,

                       const char *boot_device,

                       const char *kernel_filename, const char *kernel_cmdline,

                       const char *initrd_filename, const char *cpu_model)

{

    mips_jazz_init(ram_size, cpu_model, JAZZ_PICA61);

}

static QEMUMachine mips_magnum_machine = {

    .name = "magnum",

    .desc = "MIPS Magnum",

    .init = mips_magnum_init,

    .use_scsi = 1,

};

static QEMUMachine mips_pica61_machine = {

    .name = "pica61",

    .desc = "Acer Pica 61",

    .init = mips_pica61_init,

    .use_scsi = 1,

};

static void mips_jazz_machine_init(void)

{

    qemu_register_machine(&mips_magnum_machine);

    qemu_register_machine(&mips_pica61_machine);

}

machine_init(mips_jazz_machine_init);