Archipelago » qemu

/*

 * QEMU model of the Canon DIGIC boards (cameras indeed :).

 *

 * Copyright (C) 2013 Antony Pavlov <antonynpavlov@gmail.com>

 *

 * This model is based on reverse engineering efforts

 * made by CHDK (http://chdk.wikia.com) and

 * Magic Lantern (http://www.magiclantern.fm) projects

 * contributors.

 *

 * See docs here:

 *   http://magiclantern.wikia.com/wiki/Register_Map

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 *

 */

#include "hw/boards.h"

#include "exec/address-spaces.h"

#include "qemu/error-report.h"

#include "hw/arm/digic.h"

#include "hw/block/flash.h"

#include "hw/loader.h"

#include "sysemu/sysemu.h"

#include "sysemu/qtest.h"

#define DIGIC4_ROM0_BASE      0xf0000000

#define DIGIC4_ROM1_BASE      0xf8000000

#define DIGIC4_ROM_MAX_SIZE   0x08000000

typedef struct DigicBoardState {

    DigicState *digic;

    MemoryRegion ram;

} DigicBoardState;

typedef struct DigicBoard {

    hwaddr ram_size;

    void (*add_rom0)(DigicBoardState *, hwaddr, const char *);

    const char *rom0_def_filename;

    void (*add_rom1)(DigicBoardState *, hwaddr, const char *);

    const char *rom1_def_filename;

} DigicBoard;

static void digic4_board_setup_ram(DigicBoardState *s, hwaddr ram_size)

{

    memory_region_init_ram(&s->ram, NULL, "ram", ram_size);

    memory_region_add_subregion(get_system_memory(), 0, &s->ram);

    vmstate_register_ram_global(&s->ram);

}

static void digic4_board_init(DigicBoard *board)

{

    Error *err = NULL;

    DigicBoardState *s = g_new(DigicBoardState, 1);

    s->digic = DIGIC(object_new(TYPE_DIGIC));

    object_property_set_bool(OBJECT(s->digic), true, "realized", &err);

    if (err != NULL) {

        error_report("Couldn't realize DIGIC SoC: %s\n",

                     error_get_pretty(err));

        exit(1);

    }

    digic4_board_setup_ram(s, board->ram_size);

    if (board->add_rom0) {

        board->add_rom0(s, DIGIC4_ROM0_BASE, board->rom0_def_filename);

    }

    if (board->add_rom1) {

        board->add_rom1(s, DIGIC4_ROM1_BASE, board->rom1_def_filename);

    }

}

static void digic_load_rom(DigicBoardState *s, hwaddr addr,

                           hwaddr max_size, const char *def_filename)

{

    target_long rom_size;

    const char *filename;

    if (qtest_enabled()) {

        /* qtest runs no code so don't attempt a ROM load which

         * could fail and result in a spurious test failure.

         */

        return;

    }

    if (bios_name) {

        filename = bios_name;

    } else {

        filename = def_filename;

    }

    if (filename) {

        char *fn = qemu_find_file(QEMU_FILE_TYPE_BIOS, filename);

        if (!fn) {

            error_report("Couldn't find rom image '%s'.\n", filename);

            exit(1);

        }

        rom_size = load_image_targphys(fn, addr, max_size);

        if (rom_size < 0 || rom_size > max_size) {

            error_report("Couldn't load rom image '%s'.\n", filename);

            exit(1);

        }

    }

}

/*

 * Samsung K8P3215UQB

 * 64M Bit (4Mx16) Page Mode / Multi-Bank NOR Flash Memory

 */

static void digic4_add_k8p3215uqb_rom(DigicBoardState *s, hwaddr addr,

                                      const char *def_filename)

{

#define FLASH_K8P3215UQB_SIZE (4 * 1024 * 1024)

#define FLASH_K8P3215UQB_SECTOR_SIZE (64 * 1024)

    pflash_cfi02_register(addr, NULL, "pflash", FLASH_K8P3215UQB_SIZE,

                          NULL, FLASH_K8P3215UQB_SECTOR_SIZE,

                          FLASH_K8P3215UQB_SIZE / FLASH_K8P3215UQB_SECTOR_SIZE,

                          DIGIC4_ROM_MAX_SIZE / FLASH_K8P3215UQB_SIZE,

                          4,

                          0x00EC, 0x007E, 0x0003, 0x0001,

                          0x0555, 0x2aa, 0);

    digic_load_rom(s, addr, FLASH_K8P3215UQB_SIZE, def_filename);

}

static DigicBoard digic4_board_canon_a1100 = {

    .ram_size = 64 * 1024 * 1024,

    .add_rom1 = digic4_add_k8p3215uqb_rom,

    .rom1_def_filename = "canon-a1100-rom1.bin",

};

static void canon_a1100_init(QEMUMachineInitArgs *args)

{

    digic4_board_init(&digic4_board_canon_a1100);

}

static QEMUMachine canon_a1100 = {

    .name = "canon-a1100",

    .desc = "Canon PowerShot A1100 IS",

    .init = &canon_a1100_init,

};

static void digic_register_machines(void)

{

    qemu_register_machine(&canon_a1100);

}

machine_init(digic_register_machines)