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/*

 * Calxeda Highbank SoC emulation

 *

 * Copyright (c) 2010-2012 Calxeda

 *

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

 * under the terms and conditions of the GNU General Public License,

 * version 2 or later, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 */

#include "hw/sysbus.h"

#include "hw/arm.h"

#include "hw/arm/devices.h"

#include "hw/loader.h"

#include "net/net.h"

#include "sysemu/sysemu.h"

#include "hw/boards.h"

#include "hw/sysbus.h"

#include "sysemu/blockdev.h"

#include "exec/address-spaces.h"

#define SMP_BOOT_ADDR 0x100

#define SMP_BOOT_REG  0x40

#define GIC_BASE_ADDR 0xfff10000

#define NIRQ_GIC      160

/* Board init.  */

static void hb_write_secondary(ARMCPU *cpu, const struct arm_boot_info *info)

{

    int n;

    uint32_t smpboot[] = {

        0xee100fb0, /* mrc p15, 0, r0, c0, c0, 5 - read current core id */

        0xe210000f, /* ands r0, r0, #0x0f */

        0xe3a03040, /* mov r3, #0x40 - jump address is 0x40 + 0x10 * core id */

        0xe0830200, /* add r0, r3, r0, lsl #4 */

        0xe59f2024, /* ldr r2, privbase */

        0xe3a01001, /* mov r1, #1 */

        0xe5821100, /* str r1, [r2, #256] - set GICC_CTLR.Enable */

        0xe3a010ff, /* mov r1, #0xff */

        0xe5821104, /* str r1, [r2, #260] - set GICC_PMR.Priority to 0xff */

        0xf57ff04f, /* dsb */

        0xe320f003, /* wfi */

        0xe5901000, /* ldr     r1, [r0] */

        0xe1110001, /* tst     r1, r1 */

        0x0afffffb, /* beq     <wfi> */

        0xe12fff11, /* bx      r1 */

        GIC_BASE_ADDR      /* privbase: gic address.  */

    };

    for (n = 0; n < ARRAY_SIZE(smpboot); n++) {

        smpboot[n] = tswap32(smpboot[n]);

    }

    rom_add_blob_fixed("smpboot", smpboot, sizeof(smpboot), SMP_BOOT_ADDR);

}

static void hb_reset_secondary(ARMCPU *cpu, const struct arm_boot_info *info)

{

    CPUARMState *env = &cpu->env;

    switch (info->nb_cpus) {

    case 4:

        stl_phys_notdirty(SMP_BOOT_REG + 0x30, 0);

    case 3:

        stl_phys_notdirty(SMP_BOOT_REG + 0x20, 0);

    case 2:

        stl_phys_notdirty(SMP_BOOT_REG + 0x10, 0);

        env->regs[15] = SMP_BOOT_ADDR;

        break;

    default:

        break;

    }

}

#define NUM_REGS      0x200

static void hb_regs_write(void *opaque, hwaddr offset,

                          uint64_t value, unsigned size)

{

    uint32_t *regs = opaque;

    if (offset == 0xf00) {

        if (value == 1 || value == 2) {

            qemu_system_reset_request();

        } else if (value == 3) {

            qemu_system_shutdown_request();

        }

    }

    regs[offset/4] = value;

}

static uint64_t hb_regs_read(void *opaque, hwaddr offset,

                             unsigned size)

{

    uint32_t *regs = opaque;

    uint32_t value = regs[offset/4];

    if ((offset == 0x100) || (offset == 0x108) || (offset == 0x10C)) {

        value |= 0x30000000;

    }

    return value;

}

static const MemoryRegionOps hb_mem_ops = {

    .read = hb_regs_read,

    .write = hb_regs_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

typedef struct {

    SysBusDevice busdev;

    MemoryRegion *iomem;

    uint32_t regs[NUM_REGS];

} HighbankRegsState;

static VMStateDescription vmstate_highbank_regs = {

    .name = "highbank-regs",

    .version_id = 0,

    .minimum_version_id = 0,

    .minimum_version_id_old = 0,

    .fields = (VMStateField[]) {

        VMSTATE_UINT32_ARRAY(regs, HighbankRegsState, NUM_REGS),

        VMSTATE_END_OF_LIST(),

    },

};

static void highbank_regs_reset(DeviceState *dev)

{

    SysBusDevice *sys_dev = SYS_BUS_DEVICE(dev);

    HighbankRegsState *s = FROM_SYSBUS(HighbankRegsState, sys_dev);

    s->regs[0x40] = 0x05F20121;

    s->regs[0x41] = 0x2;

    s->regs[0x42] = 0x05F30121;

    s->regs[0x43] = 0x05F40121;

}

static int highbank_regs_init(SysBusDevice *dev)

{

    HighbankRegsState *s = FROM_SYSBUS(HighbankRegsState, dev);

    s->iomem = g_new(MemoryRegion, 1);

    memory_region_init_io(s->iomem, &hb_mem_ops, s->regs, "highbank_regs",

                          0x1000);

    sysbus_init_mmio(dev, s->iomem);

    return 0;

}

static void highbank_regs_class_init(ObjectClass *klass, void *data)

{

    SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);

    DeviceClass *dc = DEVICE_CLASS(klass);

    sbc->init = highbank_regs_init;

    dc->desc = "Calxeda Highbank registers";

    dc->vmsd = &vmstate_highbank_regs;

    dc->reset = highbank_regs_reset;

}

static const TypeInfo highbank_regs_info = {

    .name          = "highbank-regs",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(HighbankRegsState),

    .class_init    = highbank_regs_class_init,

};

static void highbank_regs_register_types(void)

{

    type_register_static(&highbank_regs_info);

}

type_init(highbank_regs_register_types)

static struct arm_boot_info highbank_binfo;

/* ram_size must be set to match the upper bound of memory in the

 * device tree (linux/arch/arm/boot/dts/highbank.dts), which is

 * normally 0xff900000 or -m 4089. When running this board on a

 * 32-bit host, set the reg value of memory to 0xf7ff00000 in the

 * device tree and pass -m 2047 to QEMU.

 */

static void highbank_init(QEMUMachineInitArgs *args)

{

    ram_addr_t ram_size = args->ram_size;

    const char *cpu_model = args->cpu_model;

    const char *kernel_filename = args->kernel_filename;

    const char *kernel_cmdline = args->kernel_cmdline;

    const char *initrd_filename = args->initrd_filename;

    DeviceState *dev;

    SysBusDevice *busdev;

    qemu_irq *irqp;

    qemu_irq pic[128];

    int n;

    qemu_irq cpu_irq[4];

    MemoryRegion *sysram;

    MemoryRegion *dram;

    MemoryRegion *sysmem;

    char *sysboot_filename;

    if (!cpu_model) {

        cpu_model = "cortex-a9";

    }

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

        ARMCPU *cpu;

        cpu = cpu_arm_init(cpu_model);

        if (cpu == NULL) {

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

            exit(1);

        }

        /* This will become a QOM property eventually */

        cpu->reset_cbar = GIC_BASE_ADDR;

        irqp = arm_pic_init_cpu(cpu);

        cpu_irq[n] = irqp[ARM_PIC_CPU_IRQ];

    }

    sysmem = get_system_memory();

    dram = g_new(MemoryRegion, 1);

    memory_region_init_ram(dram, "highbank.dram", ram_size);

    /* SDRAM at address zero.  */

    memory_region_add_subregion(sysmem, 0, dram);

    sysram = g_new(MemoryRegion, 1);

    memory_region_init_ram(sysram, "highbank.sysram", 0x8000);

    memory_region_add_subregion(sysmem, 0xfff88000, sysram);

    if (bios_name != NULL) {

        sysboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

        if (sysboot_filename != NULL) {

            uint32_t filesize = get_image_size(sysboot_filename);

            if (load_image_targphys("sysram.bin", 0xfff88000, filesize) < 0) {

                hw_error("Unable to load %s\n", bios_name);

            }

        } else {

           hw_error("Unable to find %s\n", bios_name);

        }

    }

    dev = qdev_create(NULL, "a9mpcore_priv");

    qdev_prop_set_uint32(dev, "num-cpu", smp_cpus);

    qdev_prop_set_uint32(dev, "num-irq", NIRQ_GIC);

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    sysbus_mmio_map(busdev, 0, GIC_BASE_ADDR);

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

        sysbus_connect_irq(busdev, n, cpu_irq[n]);

    }

    for (n = 0; n < 128; n++) {

        pic[n] = qdev_get_gpio_in(dev, n);

    }

    dev = qdev_create(NULL, "l2x0");

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    sysbus_mmio_map(busdev, 0, 0xfff12000);

    dev = qdev_create(NULL, "sp804");

    qdev_prop_set_uint32(dev, "freq0", 150000000);

    qdev_prop_set_uint32(dev, "freq1", 150000000);

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    sysbus_mmio_map(busdev, 0, 0xfff34000);

    sysbus_connect_irq(busdev, 0, pic[18]);

    sysbus_create_simple("pl011", 0xfff36000, pic[20]);

    dev = qdev_create(NULL, "highbank-regs");

    qdev_init_nofail(dev);

    busdev = SYS_BUS_DEVICE(dev);

    sysbus_mmio_map(busdev, 0, 0xfff3c000);

    sysbus_create_simple("pl061", 0xfff30000, pic[14]);

    sysbus_create_simple("pl061", 0xfff31000, pic[15]);

    sysbus_create_simple("pl061", 0xfff32000, pic[16]);

    sysbus_create_simple("pl061", 0xfff33000, pic[17]);

    sysbus_create_simple("pl031", 0xfff35000, pic[19]);

    sysbus_create_simple("pl022", 0xfff39000, pic[23]);

    sysbus_create_simple("sysbus-ahci", 0xffe08000, pic[83]);

    if (nd_table[0].used) {

        qemu_check_nic_model(&nd_table[0], "xgmac");

        dev = qdev_create(NULL, "xgmac");

        qdev_set_nic_properties(dev, &nd_table[0]);

        qdev_init_nofail(dev);

        sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xfff50000);

        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[77]);

        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 1, pic[78]);

        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 2, pic[79]);

        qemu_check_nic_model(&nd_table[1], "xgmac");

        dev = qdev_create(NULL, "xgmac");

        qdev_set_nic_properties(dev, &nd_table[1]);

        qdev_init_nofail(dev);

        sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xfff51000);

        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[80]);

        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 1, pic[81]);

        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 2, pic[82]);

    }

    highbank_binfo.ram_size = ram_size;

    highbank_binfo.kernel_filename = kernel_filename;

    highbank_binfo.kernel_cmdline = kernel_cmdline;

    highbank_binfo.initrd_filename = initrd_filename;

    /* highbank requires a dtb in order to boot, and the dtb will override

     * the board ID. The following value is ignored, so set it to -1 to be

     * clear that the value is meaningless.

     */

    highbank_binfo.board_id = -1;

    highbank_binfo.nb_cpus = smp_cpus;

    highbank_binfo.loader_start = 0;

    highbank_binfo.write_secondary_boot = hb_write_secondary;

    highbank_binfo.secondary_cpu_reset_hook = hb_reset_secondary;

    arm_load_kernel(arm_env_get_cpu(first_cpu), &highbank_binfo);

}

static QEMUMachine highbank_machine = {

    .name = "highbank",

    .desc = "Calxeda Highbank (ECX-1000)",

    .init = highbank_init,

    .block_default_type = IF_SCSI,

    .max_cpus = 4,

    DEFAULT_MACHINE_OPTIONS,

};

static void highbank_machine_init(void)

{

    qemu_register_machine(&highbank_machine);

}

machine_init(highbank_machine_init);