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/*

 * QEMU PowerPC 405 evaluation boards emulation

 *

 * Copyright (c) 2007 Jocelyn Mayer

 *

 * 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 "ppc.h"

#include "ppc405.h"

#include "nvram.h"

#include "flash.h"

#include "sysemu.h"

#include "block.h"

#include "boards.h"

#include "qemu-log.h"

#include "loader.h"

#include "blockdev.h"

#include "exec-memory.h"

#define BIOS_FILENAME "ppc405_rom.bin"

#define BIOS_SIZE (2048 * 1024)

#define KERNEL_LOAD_ADDR 0x00000000

#define INITRD_LOAD_ADDR 0x01800000

#define USE_FLASH_BIOS

#define DEBUG_BOARD_INIT

/*****************************************************************************/

/* PPC405EP reference board (IBM) */

/* Standalone board with:

 * - PowerPC 405EP CPU

 * - SDRAM (0x00000000)

 * - Flash (0xFFF80000)

 * - SRAM  (0xFFF00000)

 * - NVRAM (0xF0000000)

 * - FPGA  (0xF0300000)

 */

typedef struct ref405ep_fpga_t ref405ep_fpga_t;

struct ref405ep_fpga_t {

    uint8_t reg0;

    uint8_t reg1;

};

static uint32_t ref405ep_fpga_readb (void *opaque, target_phys_addr_t addr)

{

    ref405ep_fpga_t *fpga;

    uint32_t ret;

    fpga = opaque;

    switch (addr) {

    case 0x0:

        ret = fpga->reg0;

        break;

    case 0x1:

        ret = fpga->reg1;

        break;

    default:

        ret = 0;

        break;

    }

    return ret;

}

static void ref405ep_fpga_writeb (void *opaque,

                                  target_phys_addr_t addr, uint32_t value)

{

    ref405ep_fpga_t *fpga;

    fpga = opaque;

    switch (addr) {

    case 0x0:

        /* Read only */

        break;

    case 0x1:

        fpga->reg1 = value;

        break;

    default:

        break;

    }

}

static uint32_t ref405ep_fpga_readw (void *opaque, target_phys_addr_t addr)

{

    uint32_t ret;

    ret = ref405ep_fpga_readb(opaque, addr) << 8;

    ret |= ref405ep_fpga_readb(opaque, addr + 1);

    return ret;

}

static void ref405ep_fpga_writew (void *opaque,

                                  target_phys_addr_t addr, uint32_t value)

{

    ref405ep_fpga_writeb(opaque, addr, (value >> 8) & 0xFF);

    ref405ep_fpga_writeb(opaque, addr + 1, value & 0xFF);

}

static uint32_t ref405ep_fpga_readl (void *opaque, target_phys_addr_t addr)

{

    uint32_t ret;

    ret = ref405ep_fpga_readb(opaque, addr) << 24;

    ret |= ref405ep_fpga_readb(opaque, addr + 1) << 16;

    ret |= ref405ep_fpga_readb(opaque, addr + 2) << 8;

    ret |= ref405ep_fpga_readb(opaque, addr + 3);

    return ret;

}

static void ref405ep_fpga_writel (void *opaque,

                                  target_phys_addr_t addr, uint32_t value)

{

    ref405ep_fpga_writeb(opaque, addr, (value >> 24) & 0xFF);

    ref405ep_fpga_writeb(opaque, addr + 1, (value >> 16) & 0xFF);

    ref405ep_fpga_writeb(opaque, addr + 2, (value >> 8) & 0xFF);

    ref405ep_fpga_writeb(opaque, addr + 3, value & 0xFF);

}

static const MemoryRegionOps ref405ep_fpga_ops = {

    .old_mmio = {

        .read = {

            ref405ep_fpga_readb, ref405ep_fpga_readw, ref405ep_fpga_readl,

        },

        .write = {

            ref405ep_fpga_writeb, ref405ep_fpga_writew, ref405ep_fpga_writel,

        },

    },

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static void ref405ep_fpga_reset (void *opaque)

{

    ref405ep_fpga_t *fpga;

    fpga = opaque;

    fpga->reg0 = 0x00;

    fpga->reg1 = 0x0F;

}

static void ref405ep_fpga_init (MemoryRegion *sysmem, uint32_t base)

{

    ref405ep_fpga_t *fpga;

    MemoryRegion *fpga_memory = g_new(MemoryRegion, 1);

    fpga = g_malloc0(sizeof(ref405ep_fpga_t));

    memory_region_init_io(fpga_memory, &ref405ep_fpga_ops, fpga,

                          "fpga", 0x00000100);

    memory_region_add_subregion(sysmem, base, fpga_memory);

    qemu_register_reset(&ref405ep_fpga_reset, fpga);

}

static void ref405ep_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)

{

    char *filename;

    ppc4xx_bd_info_t bd;

    CPUPPCState *env;

    qemu_irq *pic;

    MemoryRegion *bios;

    MemoryRegion *sram = g_new(MemoryRegion, 1);

    ram_addr_t bdloc;

    MemoryRegion *ram_memories = g_malloc(2 * sizeof(*ram_memories));

    target_phys_addr_t ram_bases[2], ram_sizes[2];

    target_ulong sram_size;

    long bios_size;

    //int phy_addr = 0;

    //static int phy_addr = 1;

    target_ulong kernel_base, initrd_base;

    long kernel_size, initrd_size;

    int linux_boot;

    int fl_idx, fl_sectors, len;

    DriveInfo *dinfo;

    MemoryRegion *sysmem = get_system_memory();

    /* XXX: fix this */

    memory_region_init_ram(&ram_memories[0], "ef405ep.ram", 0x08000000);

    vmstate_register_ram_global(&ram_memories[0]);

    ram_bases[0] = 0;

    ram_sizes[0] = 0x08000000;

    memory_region_init(&ram_memories[1], "ef405ep.ram1", 0);

    ram_bases[1] = 0x00000000;

    ram_sizes[1] = 0x00000000;

    ram_size = 128 * 1024 * 1024;

#ifdef DEBUG_BOARD_INIT

    printf("%s: register cpu\n", __func__);

#endif

    env = ppc405ep_init(sysmem, ram_memories, ram_bases, ram_sizes,

                        33333333, &pic, kernel_filename == NULL ? 0 : 1);

    /* allocate SRAM */

    sram_size = 512 * 1024;

    memory_region_init_ram(sram, "ef405ep.sram", sram_size);

    vmstate_register_ram_global(sram);

    memory_region_add_subregion(sysmem, 0xFFF00000, sram);

    /* allocate and load BIOS */

#ifdef DEBUG_BOARD_INIT

    printf("%s: register BIOS\n", __func__);

#endif

    fl_idx = 0;

#ifdef USE_FLASH_BIOS

    dinfo = drive_get(IF_PFLASH, 0, fl_idx);

    if (dinfo) {

        bios_size = bdrv_getlength(dinfo->bdrv);

        fl_sectors = (bios_size + 65535) >> 16;

#ifdef DEBUG_BOARD_INIT

        printf("Register parallel flash %d size %lx"

               " at addr %lx '%s' %d\n",

               fl_idx, bios_size, -bios_size,

               bdrv_get_device_name(dinfo->bdrv), fl_sectors);

#endif

        pflash_cfi02_register((uint32_t)(-bios_size),

                              NULL, "ef405ep.bios", bios_size,

                              dinfo->bdrv, 65536, fl_sectors, 1,

                              2, 0x0001, 0x22DA, 0x0000, 0x0000, 0x555, 0x2AA,

                              1);

        fl_idx++;

    } else

#endif

    {

#ifdef DEBUG_BOARD_INIT

        printf("Load BIOS from file\n");

#endif

        bios = g_new(MemoryRegion, 1);

        memory_region_init_ram(bios, "ef405ep.bios", BIOS_SIZE);

        vmstate_register_ram_global(bios);

        if (bios_name == NULL)

            bios_name = BIOS_FILENAME;

        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

        if (filename) {

            bios_size = load_image(filename, memory_region_get_ram_ptr(bios));

            g_free(filename);

        } else {

            bios_size = -1;

        }

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

            fprintf(stderr, "qemu: could not load PowerPC bios '%s'\n",

                    bios_name);

            exit(1);

        }

        bios_size = (bios_size + 0xfff) & ~0xfff;

        memory_region_set_readonly(bios, true);

        memory_region_add_subregion(sysmem, (uint32_t)(-bios_size), bios);

    }

    /* Register FPGA */

#ifdef DEBUG_BOARD_INIT

    printf("%s: register FPGA\n", __func__);

#endif

    ref405ep_fpga_init(sysmem, 0xF0300000);

    /* Register NVRAM */

#ifdef DEBUG_BOARD_INIT

    printf("%s: register NVRAM\n", __func__);

#endif

    m48t59_init(NULL, 0xF0000000, 0, 8192, 8);

    /* Load kernel */

    linux_boot = (kernel_filename != NULL);

    if (linux_boot) {

#ifdef DEBUG_BOARD_INIT

        printf("%s: load kernel\n", __func__);

#endif

        memset(&bd, 0, sizeof(bd));

        bd.bi_memstart = 0x00000000;

        bd.bi_memsize = ram_size;

        bd.bi_flashstart = -bios_size;

        bd.bi_flashsize = -bios_size;

        bd.bi_flashoffset = 0;

        bd.bi_sramstart = 0xFFF00000;

        bd.bi_sramsize = sram_size;

        bd.bi_bootflags = 0;

        bd.bi_intfreq = 133333333;

        bd.bi_busfreq = 33333333;

        bd.bi_baudrate = 115200;

        bd.bi_s_version[0] = 'Q';

        bd.bi_s_version[1] = 'M';

        bd.bi_s_version[2] = 'U';

        bd.bi_s_version[3] = '\0';

        bd.bi_r_version[0] = 'Q';

        bd.bi_r_version[1] = 'E';

        bd.bi_r_version[2] = 'M';

        bd.bi_r_version[3] = 'U';

        bd.bi_r_version[4] = '\0';

        bd.bi_procfreq = 133333333;

        bd.bi_plb_busfreq = 33333333;

        bd.bi_pci_busfreq = 33333333;

        bd.bi_opbfreq = 33333333;

        bdloc = ppc405_set_bootinfo(env, &bd, 0x00000001);

        env->gpr[3] = bdloc;

        kernel_base = KERNEL_LOAD_ADDR;

        /* now we can load the kernel */

        kernel_size = load_image_targphys(kernel_filename, kernel_base,

                                          ram_size - kernel_base);

        if (kernel_size < 0) {

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

                    kernel_filename);

            exit(1);

        }

        printf("Load kernel size %ld at " TARGET_FMT_lx,

               kernel_size, kernel_base);

        /* load initrd */

        if (initrd_filename) {

            initrd_base = INITRD_LOAD_ADDR;

            initrd_size = load_image_targphys(initrd_filename, initrd_base,

                                              ram_size - initrd_base);

            if (initrd_size < 0) {

                fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",

                        initrd_filename);

                exit(1);

            }

        } else {

            initrd_base = 0;

            initrd_size = 0;

        }

        env->gpr[4] = initrd_base;

        env->gpr[5] = initrd_size;

        if (kernel_cmdline != NULL) {

            len = strlen(kernel_cmdline);

            bdloc -= ((len + 255) & ~255);

            cpu_physical_memory_write(bdloc, (void *)kernel_cmdline, len + 1);

            env->gpr[6] = bdloc;

            env->gpr[7] = bdloc + len;

        } else {

            env->gpr[6] = 0;

            env->gpr[7] = 0;

        }

        env->nip = KERNEL_LOAD_ADDR;

    } else {

        kernel_base = 0;

        kernel_size = 0;

        initrd_base = 0;

        initrd_size = 0;

        bdloc = 0;

    }

#ifdef DEBUG_BOARD_INIT

    printf("%s: Done\n", __func__);

#endif

    printf("bdloc " RAM_ADDR_FMT "\n", bdloc);

}

static QEMUMachine ref405ep_machine = {

    .name = "ref405ep",

    .desc = "ref405ep",

    .init = ref405ep_init,

};

/*****************************************************************************/

/* AMCC Taihu evaluation board */

/* - PowerPC 405EP processor

 * - SDRAM               128 MB at 0x00000000

 * - Boot flash          2 MB   at 0xFFE00000

 * - Application flash   32 MB  at 0xFC000000

 * - 2 serial ports

 * - 2 ethernet PHY

 * - 1 USB 1.1 device    0x50000000

 * - 1 LCD display       0x50100000

 * - 1 CPLD              0x50100000

 * - 1 I2C EEPROM

 * - 1 I2C thermal sensor

 * - a set of LEDs

 * - bit-bang SPI port using GPIOs

 * - 1 EBC interface connector 0 0x50200000

 * - 1 cardbus controller + expansion slot.

 * - 1 PCI expansion slot.

 */

typedef struct taihu_cpld_t taihu_cpld_t;

struct taihu_cpld_t {

    uint8_t reg0;

    uint8_t reg1;

};

static uint32_t taihu_cpld_readb (void *opaque, target_phys_addr_t addr)

{

    taihu_cpld_t *cpld;

    uint32_t ret;

    cpld = opaque;

    switch (addr) {

    case 0x0:

        ret = cpld->reg0;

        break;

    case 0x1:

        ret = cpld->reg1;

        break;

    default:

        ret = 0;

        break;

    }

    return ret;

}

static void taihu_cpld_writeb (void *opaque,

                               target_phys_addr_t addr, uint32_t value)

{

    taihu_cpld_t *cpld;

    cpld = opaque;

    switch (addr) {

    case 0x0:

        /* Read only */

        break;

    case 0x1:

        cpld->reg1 = value;

        break;

    default:

        break;

    }

}

static uint32_t taihu_cpld_readw (void *opaque, target_phys_addr_t addr)

{

    uint32_t ret;

    ret = taihu_cpld_readb(opaque, addr) << 8;

    ret |= taihu_cpld_readb(opaque, addr + 1);

    return ret;

}

static void taihu_cpld_writew (void *opaque,

                               target_phys_addr_t addr, uint32_t value)

{

    taihu_cpld_writeb(opaque, addr, (value >> 8) & 0xFF);

    taihu_cpld_writeb(opaque, addr + 1, value & 0xFF);

}

static uint32_t taihu_cpld_readl (void *opaque, target_phys_addr_t addr)

{

    uint32_t ret;

    ret = taihu_cpld_readb(opaque, addr) << 24;

    ret |= taihu_cpld_readb(opaque, addr + 1) << 16;

    ret |= taihu_cpld_readb(opaque, addr + 2) << 8;

    ret |= taihu_cpld_readb(opaque, addr + 3);

    return ret;

}

static void taihu_cpld_writel (void *opaque,

                               target_phys_addr_t addr, uint32_t value)

{

    taihu_cpld_writel(opaque, addr, (value >> 24) & 0xFF);

    taihu_cpld_writel(opaque, addr + 1, (value >> 16) & 0xFF);

    taihu_cpld_writel(opaque, addr + 2, (value >> 8) & 0xFF);

    taihu_cpld_writeb(opaque, addr + 3, value & 0xFF);

}

static const MemoryRegionOps taihu_cpld_ops = {

    .old_mmio = {

        .read = { taihu_cpld_readb, taihu_cpld_readw, taihu_cpld_readl, },

        .write = { taihu_cpld_writeb, taihu_cpld_writew, taihu_cpld_writel, },

    },

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static void taihu_cpld_reset (void *opaque)

{

    taihu_cpld_t *cpld;

    cpld = opaque;

    cpld->reg0 = 0x01;

    cpld->reg1 = 0x80;

}

static void taihu_cpld_init (MemoryRegion *sysmem, uint32_t base)

{

    taihu_cpld_t *cpld;

    MemoryRegion *cpld_memory = g_new(MemoryRegion, 1);

    cpld = g_malloc0(sizeof(taihu_cpld_t));

    memory_region_init_io(cpld_memory, &taihu_cpld_ops, cpld, "cpld", 0x100);

    memory_region_add_subregion(sysmem, base, cpld_memory);

    qemu_register_reset(&taihu_cpld_reset, cpld);

}

static void taihu_405ep_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)

{

    char *filename;

    qemu_irq *pic;

    MemoryRegion *sysmem = get_system_memory();

    MemoryRegion *bios;

    MemoryRegion *ram_memories = g_malloc(2 * sizeof(*ram_memories));

    target_phys_addr_t ram_bases[2], ram_sizes[2];

    long bios_size;

    target_ulong kernel_base, initrd_base;

    long kernel_size, initrd_size;

    int linux_boot;

    int fl_idx, fl_sectors;

    DriveInfo *dinfo;

    /* RAM is soldered to the board so the size cannot be changed */

    memory_region_init_ram(&ram_memories[0],

                           "taihu_405ep.ram-0", 0x04000000);

    vmstate_register_ram_global(&ram_memories[0]);

    ram_bases[0] = 0;

    ram_sizes[0] = 0x04000000;

    memory_region_init_ram(&ram_memories[1],

                           "taihu_405ep.ram-1", 0x04000000);

    vmstate_register_ram_global(&ram_memories[1]);

    ram_bases[1] = 0x04000000;

    ram_sizes[1] = 0x04000000;

    ram_size = 0x08000000;

#ifdef DEBUG_BOARD_INIT

    printf("%s: register cpu\n", __func__);

#endif

    ppc405ep_init(sysmem, ram_memories, ram_bases, ram_sizes,

                  33333333, &pic, kernel_filename == NULL ? 0 : 1);

    /* allocate and load BIOS */

#ifdef DEBUG_BOARD_INIT

    printf("%s: register BIOS\n", __func__);

#endif

    fl_idx = 0;

#if defined(USE_FLASH_BIOS)

    dinfo = drive_get(IF_PFLASH, 0, fl_idx);

    if (dinfo) {

        bios_size = bdrv_getlength(dinfo->bdrv);

        /* XXX: should check that size is 2MB */

        //        bios_size = 2 * 1024 * 1024;

        fl_sectors = (bios_size + 65535) >> 16;

#ifdef DEBUG_BOARD_INIT

        printf("Register parallel flash %d size %lx"

               " at addr %lx '%s' %d\n",

               fl_idx, bios_size, -bios_size,

               bdrv_get_device_name(dinfo->bdrv), fl_sectors);

#endif

        pflash_cfi02_register((uint32_t)(-bios_size),

                              NULL, "taihu_405ep.bios", bios_size,

                              dinfo->bdrv, 65536, fl_sectors, 1,

                              4, 0x0001, 0x22DA, 0x0000, 0x0000, 0x555, 0x2AA,

                              1);

        fl_idx++;

    } else

#endif

    {

#ifdef DEBUG_BOARD_INIT

        printf("Load BIOS from file\n");

#endif

        if (bios_name == NULL)

            bios_name = BIOS_FILENAME;

        bios = g_new(MemoryRegion, 1);

        memory_region_init_ram(bios, "taihu_405ep.bios", BIOS_SIZE);

        vmstate_register_ram_global(bios);

        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

        if (filename) {

            bios_size = load_image(filename, memory_region_get_ram_ptr(bios));

            g_free(filename);

        } else {

            bios_size = -1;

        }

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

            fprintf(stderr, "qemu: could not load PowerPC bios '%s'\n",

                    bios_name);

            exit(1);

        }

        bios_size = (bios_size + 0xfff) & ~0xfff;

        memory_region_set_readonly(bios, true);

        memory_region_add_subregion(sysmem, (uint32_t)(-bios_size), bios);

    }

    /* Register Linux flash */

    dinfo = drive_get(IF_PFLASH, 0, fl_idx);

    if (dinfo) {

        bios_size = bdrv_getlength(dinfo->bdrv);

        /* XXX: should check that size is 32MB */

        bios_size = 32 * 1024 * 1024;

        fl_sectors = (bios_size + 65535) >> 16;

#ifdef DEBUG_BOARD_INIT

        printf("Register parallel flash %d size %lx"

               " at addr " TARGET_FMT_lx " '%s'\n",

               fl_idx, bios_size, (target_ulong)0xfc000000,

               bdrv_get_device_name(dinfo->bdrv));

#endif

        pflash_cfi02_register(0xfc000000, NULL, "taihu_405ep.flash", bios_size,

                              dinfo->bdrv, 65536, fl_sectors, 1,

                              4, 0x0001, 0x22DA, 0x0000, 0x0000, 0x555, 0x2AA,

                              1);

        fl_idx++;

    }

    /* Register CLPD & LCD display */

#ifdef DEBUG_BOARD_INIT

    printf("%s: register CPLD\n", __func__);

#endif

    taihu_cpld_init(sysmem, 0x50100000);

    /* Load kernel */

    linux_boot = (kernel_filename != NULL);

    if (linux_boot) {

#ifdef DEBUG_BOARD_INIT

        printf("%s: load kernel\n", __func__);

#endif

        kernel_base = KERNEL_LOAD_ADDR;

        /* now we can load the kernel */

        kernel_size = load_image_targphys(kernel_filename, kernel_base,

                                          ram_size - kernel_base);

        if (kernel_size < 0) {

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

                    kernel_filename);

            exit(1);

        }

        /* load initrd */

        if (initrd_filename) {

            initrd_base = INITRD_LOAD_ADDR;

            initrd_size = load_image_targphys(initrd_filename, initrd_base,

                                              ram_size - initrd_base);

            if (initrd_size < 0) {

                fprintf(stderr,

                        "qemu: could not load initial ram disk '%s'\n",

                        initrd_filename);

                exit(1);

            }

        } else {

            initrd_base = 0;

            initrd_size = 0;

        }

    } else {

        kernel_base = 0;

        kernel_size = 0;

        initrd_base = 0;

        initrd_size = 0;

    }

#ifdef DEBUG_BOARD_INIT

    printf("%s: Done\n", __func__);

#endif

}

static QEMUMachine taihu_machine = {

    .name = "taihu",

    .desc = "taihu",

    .init = taihu_405ep_init,

};

static void ppc405_machine_init(void)

{

    qemu_register_machine(&ref405ep_machine);

    qemu_register_machine(&taihu_machine);

}

machine_init(ppc405_machine_init);