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/*

 * ARM Versatile Express emulation.

 *

 * Copyright (c) 2010 - 2011 B Labs Ltd.

 * Copyright (c) 2011 Linaro Limited

 * Written by Bahadir Balban, Amit Mahajan, Peter Maydell

 *

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

 *  it under the terms of the GNU General Public License version 2 as

 *  published by the Free Software Foundation.

 *

 *  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.

 *

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

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

 *

 *  Contributions after 2012-01-13 are licensed under the terms of the

 *  GNU GPL, version 2 or (at your option) any later version.

 */

#include "sysbus.h"

#include "arm-misc.h"

#include "primecell.h"

#include "devices.h"

#include "net.h"

#include "sysemu.h"

#include "boards.h"

#include "exec-memory.h"

#define VEXPRESS_BOARD_ID 0x8e0

static struct arm_boot_info vexpress_binfo;

/* Address maps for peripherals:

 * the Versatile Express motherboard has two possible maps,

 * the "legacy" one (used for A9) and the "Cortex-A Series"

 * map (used for newer cores).

 * Individual daughterboards can also have different maps for

 * their peripherals.

 */

enum {

    VE_SYSREGS,

    VE_SP810,

    VE_SERIALPCI,

    VE_PL041,

    VE_MMCI,

    VE_KMI0,

    VE_KMI1,

    VE_UART0,

    VE_UART1,

    VE_UART2,

    VE_UART3,

    VE_WDT,

    VE_TIMER01,

    VE_TIMER23,

    VE_SERIALDVI,

    VE_RTC,

    VE_COMPACTFLASH,

    VE_CLCD,

    VE_NORFLASH0,

    VE_NORFLASH0ALIAS,

    VE_NORFLASH1,

    VE_SRAM,

    VE_VIDEORAM,

    VE_ETHERNET,

    VE_USB,

    VE_DAPROM,

};

static target_phys_addr_t motherboard_legacy_map[] = {

    /* CS7: 0x10000000 .. 0x10020000 */

    [VE_SYSREGS] = 0x10000000,

    [VE_SP810] = 0x10001000,

    [VE_SERIALPCI] = 0x10002000,

    [VE_PL041] = 0x10004000,

    [VE_MMCI] = 0x10005000,

    [VE_KMI0] = 0x10006000,

    [VE_KMI1] = 0x10007000,

    [VE_UART0] = 0x10009000,

    [VE_UART1] = 0x1000a000,

    [VE_UART2] = 0x1000b000,

    [VE_UART3] = 0x1000c000,

    [VE_WDT] = 0x1000f000,

    [VE_TIMER01] = 0x10011000,

    [VE_TIMER23] = 0x10012000,

    [VE_SERIALDVI] = 0x10016000,

    [VE_RTC] = 0x10017000,

    [VE_COMPACTFLASH] = 0x1001a000,

    [VE_CLCD] = 0x1001f000,

    /* CS0: 0x40000000 .. 0x44000000 */

    [VE_NORFLASH0] = 0x40000000,

    /* CS1: 0x44000000 .. 0x48000000 */

    [VE_NORFLASH1] = 0x44000000,

    /* CS2: 0x48000000 .. 0x4a000000 */

    [VE_SRAM] = 0x48000000,

    /* CS3: 0x4c000000 .. 0x50000000 */

    [VE_VIDEORAM] = 0x4c000000,

    [VE_ETHERNET] = 0x4e000000,

    [VE_USB] = 0x4f000000,

};

static target_phys_addr_t motherboard_aseries_map[] = {

    /* CS0: 0x00000000 .. 0x0c000000 */

    [VE_NORFLASH0] = 0x00000000,

    [VE_NORFLASH0ALIAS] = 0x08000000,

    /* CS4: 0x0c000000 .. 0x10000000 */

    [VE_NORFLASH1] = 0x0c000000,

    /* CS5: 0x10000000 .. 0x14000000 */

    /* CS1: 0x14000000 .. 0x18000000 */

    [VE_SRAM] = 0x14000000,

    /* CS2: 0x18000000 .. 0x1c000000 */

    [VE_VIDEORAM] = 0x18000000,

    [VE_ETHERNET] = 0x1a000000,

    [VE_USB] = 0x1b000000,

    /* CS3: 0x1c000000 .. 0x20000000 */

    [VE_DAPROM] = 0x1c000000,

    [VE_SYSREGS] = 0x1c010000,

    [VE_SP810] = 0x1c020000,

    [VE_SERIALPCI] = 0x1c030000,

    [VE_PL041] = 0x1c040000,

    [VE_MMCI] = 0x1c050000,

    [VE_KMI0] = 0x1c060000,

    [VE_KMI1] = 0x1c070000,

    [VE_UART0] = 0x1c090000,

    [VE_UART1] = 0x1c0a0000,

    [VE_UART2] = 0x1c0b0000,

    [VE_UART3] = 0x1c0c0000,

    [VE_WDT] = 0x1c0f0000,

    [VE_TIMER01] = 0x1c110000,

    [VE_TIMER23] = 0x1c120000,

    [VE_SERIALDVI] = 0x1c160000,

    [VE_RTC] = 0x1c170000,

    [VE_COMPACTFLASH] = 0x1c1a0000,

    [VE_CLCD] = 0x1c1f0000,

};

/* Structure defining the peculiarities of a specific daughterboard */

typedef struct VEDBoardInfo VEDBoardInfo;

typedef void DBoardInitFn(const VEDBoardInfo *daughterboard,

                          ram_addr_t ram_size,

                          const char *cpu_model,

                          qemu_irq *pic, uint32_t *proc_id);

struct VEDBoardInfo {

    const target_phys_addr_t *motherboard_map;

    target_phys_addr_t loader_start;

    const target_phys_addr_t gic_cpu_if_addr;

    DBoardInitFn *init;

};

static void a9_daughterboard_init(const VEDBoardInfo *daughterboard,

                                  ram_addr_t ram_size,

                                  const char *cpu_model,

                                  qemu_irq *pic, uint32_t *proc_id)

{

    MemoryRegion *sysmem = get_system_memory();

    MemoryRegion *ram = g_new(MemoryRegion, 1);

    MemoryRegion *lowram = g_new(MemoryRegion, 1);

    DeviceState *dev;

    SysBusDevice *busdev;

    qemu_irq *irqp;

    int n;

    qemu_irq cpu_irq[4];

    ram_addr_t low_ram_size;

    if (!cpu_model) {

        cpu_model = "cortex-a9";

    }

    *proc_id = 0x0c000191;

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

        ARMCPU *cpu = cpu_arm_init(cpu_model);

        if (!cpu) {

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

            exit(1);

        }

        irqp = arm_pic_init_cpu(cpu);

        cpu_irq[n] = irqp[ARM_PIC_CPU_IRQ];

    }

    if (ram_size > 0x40000000) {

        /* 1GB is the maximum the address space permits */

        fprintf(stderr, "vexpress-a9: cannot model more than 1GB RAM\n");

        exit(1);

    }

    memory_region_init_ram(ram, "vexpress.highmem", ram_size);

    vmstate_register_ram_global(ram);

    low_ram_size = ram_size;

    if (low_ram_size > 0x4000000) {

        low_ram_size = 0x4000000;

    }

    /* RAM is from 0x60000000 upwards. The bottom 64MB of the

     * address space should in theory be remappable to various

     * things including ROM or RAM; we always map the RAM there.

     */

    memory_region_init_alias(lowram, "vexpress.lowmem", ram, 0, low_ram_size);

    memory_region_add_subregion(sysmem, 0x0, lowram);

    memory_region_add_subregion(sysmem, 0x60000000, ram);

    /* 0x1e000000 A9MPCore (SCU) private memory region */

    dev = qdev_create(NULL, "a9mpcore_priv");

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

    qdev_init_nofail(dev);

    busdev = sysbus_from_qdev(dev);

    sysbus_mmio_map(busdev, 0, 0x1e000000);

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

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

    }

    /* Interrupts [42:0] are from the motherboard;

     * [47:43] are reserved; [63:48] are daughterboard

     * peripherals. Note that some documentation numbers

     * external interrupts starting from 32 (because the

     * A9MP has internal interrupts 0..31).

     */

    for (n = 0; n < 64; n++) {

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

    }

    /* Daughterboard peripherals : 0x10020000 .. 0x20000000 */

    /* 0x10020000 PL111 CLCD (daughterboard) */

    sysbus_create_simple("pl111", 0x10020000, pic[44]);

    /* 0x10060000 AXI RAM */

    /* 0x100e0000 PL341 Dynamic Memory Controller */

    /* 0x100e1000 PL354 Static Memory Controller */

    /* 0x100e2000 System Configuration Controller */

    sysbus_create_simple("sp804", 0x100e4000, pic[48]);

    /* 0x100e5000 SP805 Watchdog module */

    /* 0x100e6000 BP147 TrustZone Protection Controller */

    /* 0x100e9000 PL301 'Fast' AXI matrix */

    /* 0x100ea000 PL301 'Slow' AXI matrix */

    /* 0x100ec000 TrustZone Address Space Controller */

    /* 0x10200000 CoreSight debug APB */

    /* 0x1e00a000 PL310 L2 Cache Controller */

    sysbus_create_varargs("l2x0", 0x1e00a000, NULL);

}

static const VEDBoardInfo a9_daughterboard = {

    .motherboard_map = motherboard_legacy_map,

    .loader_start = 0x60000000,

    .gic_cpu_if_addr = 0x1e000100,

    .init = a9_daughterboard_init,

};

static void a15_daughterboard_init(const VEDBoardInfo *daughterboard,

                                   ram_addr_t ram_size,

                                   const char *cpu_model,

                                   qemu_irq *pic, uint32_t *proc_id)

{

    int n;

    MemoryRegion *sysmem = get_system_memory();

    MemoryRegion *ram = g_new(MemoryRegion, 1);

    MemoryRegion *sram = g_new(MemoryRegion, 1);

    qemu_irq cpu_irq[4];

    DeviceState *dev;

    SysBusDevice *busdev;

    if (!cpu_model) {

        cpu_model = "cortex-a15";

    }

    *proc_id = 0x14000217;

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

        ARMCPU *cpu;

        qemu_irq *irqp;

        cpu = cpu_arm_init(cpu_model);

        if (!cpu) {

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

            exit(1);

        }

        irqp = arm_pic_init_cpu(cpu);

        cpu_irq[n] = irqp[ARM_PIC_CPU_IRQ];

    }

    {

        /* We have to use a separate 64 bit variable here to avoid the gcc

         * "comparison is always false due to limited range of data type"

         * warning if we are on a host where ram_addr_t is 32 bits.

         */

        uint64_t rsz = ram_size;

        if (rsz > (30ULL * 1024 * 1024 * 1024)) {

            fprintf(stderr, "vexpress-a15: cannot model more than 30GB RAM\n");

            exit(1);

        }

    }

    memory_region_init_ram(ram, "vexpress.highmem", ram_size);

    vmstate_register_ram_global(ram);

    /* RAM is from 0x80000000 upwards; there is no low-memory alias for it. */

    memory_region_add_subregion(sysmem, 0x80000000, ram);

    /* 0x2c000000 A15MPCore private memory region (GIC) */

    dev = qdev_create(NULL, "a15mpcore_priv");

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

    qdev_init_nofail(dev);

    busdev = sysbus_from_qdev(dev);

    sysbus_mmio_map(busdev, 0, 0x2c000000);

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

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

    }

    /* Interrupts [42:0] are from the motherboard;

     * [47:43] are reserved; [63:48] are daughterboard

     * peripherals. Note that some documentation numbers

     * external interrupts starting from 32 (because there

     * are internal interrupts 0..31).

     */

    for (n = 0; n < 64; n++) {

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

    }

    /* A15 daughterboard peripherals: */

    /* 0x20000000: CoreSight interfaces: not modelled */

    /* 0x2a000000: PL301 AXI interconnect: not modelled */

    /* 0x2a420000: SCC: not modelled */

    /* 0x2a430000: system counter: not modelled */

    /* 0x2b000000: HDLCD controller: not modelled */

    /* 0x2b060000: SP805 watchdog: not modelled */

    /* 0x2b0a0000: PL341 dynamic memory controller: not modelled */

    /* 0x2e000000: system SRAM */

    memory_region_init_ram(sram, "vexpress.a15sram", 0x10000);

    vmstate_register_ram_global(sram);

    memory_region_add_subregion(sysmem, 0x2e000000, sram);

    /* 0x7ffb0000: DMA330 DMA controller: not modelled */

    /* 0x7ffd0000: PL354 static memory controller: not modelled */

}

static const VEDBoardInfo a15_daughterboard = {

    .motherboard_map = motherboard_aseries_map,

    .loader_start = 0x80000000,

    .gic_cpu_if_addr = 0x2c002000,

    .init = a15_daughterboard_init,

};

static void vexpress_common_init(const VEDBoardInfo *daughterboard,

                                 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)

{

    DeviceState *dev, *sysctl, *pl041;

    qemu_irq pic[64];

    uint32_t proc_id;

    uint32_t sys_id;

    ram_addr_t vram_size, sram_size;

    MemoryRegion *sysmem = get_system_memory();

    MemoryRegion *vram = g_new(MemoryRegion, 1);

    MemoryRegion *sram = g_new(MemoryRegion, 1);

    const target_phys_addr_t *map = daughterboard->motherboard_map;

    daughterboard->init(daughterboard, ram_size, cpu_model, pic, &proc_id);

    /* Motherboard peripherals: the wiring is the same but the

     * addresses vary between the legacy and A-Series memory maps.

     */

    sys_id = 0x1190f500;

    sysctl = qdev_create(NULL, "realview_sysctl");

    qdev_prop_set_uint32(sysctl, "sys_id", sys_id);

    qdev_prop_set_uint32(sysctl, "proc_id", proc_id);

    qdev_init_nofail(sysctl);

    sysbus_mmio_map(sysbus_from_qdev(sysctl), 0, map[VE_SYSREGS]);

    /* VE_SP810: not modelled */

    /* VE_SERIALPCI: not modelled */

    pl041 = qdev_create(NULL, "pl041");

    qdev_prop_set_uint32(pl041, "nc_fifo_depth", 512);

    qdev_init_nofail(pl041);

    sysbus_mmio_map(sysbus_from_qdev(pl041), 0, map[VE_PL041]);

    sysbus_connect_irq(sysbus_from_qdev(pl041), 0, pic[11]);

    dev = sysbus_create_varargs("pl181", map[VE_MMCI], pic[9], pic[10], NULL);

    /* Wire up MMC card detect and read-only signals */

    qdev_connect_gpio_out(dev, 0,

                          qdev_get_gpio_in(sysctl, ARM_SYSCTL_GPIO_MMC_WPROT));

    qdev_connect_gpio_out(dev, 1,

                          qdev_get_gpio_in(sysctl, ARM_SYSCTL_GPIO_MMC_CARDIN));

    sysbus_create_simple("pl050_keyboard", map[VE_KMI0], pic[12]);

    sysbus_create_simple("pl050_mouse", map[VE_KMI1], pic[13]);

    sysbus_create_simple("pl011", map[VE_UART0], pic[5]);

    sysbus_create_simple("pl011", map[VE_UART1], pic[6]);

    sysbus_create_simple("pl011", map[VE_UART2], pic[7]);

    sysbus_create_simple("pl011", map[VE_UART3], pic[8]);

    sysbus_create_simple("sp804", map[VE_TIMER01], pic[2]);

    sysbus_create_simple("sp804", map[VE_TIMER23], pic[3]);

    /* VE_SERIALDVI: not modelled */

    sysbus_create_simple("pl031", map[VE_RTC], pic[4]); /* RTC */

    /* VE_COMPACTFLASH: not modelled */

    sysbus_create_simple("pl111", map[VE_CLCD], pic[14]);

    /* VE_NORFLASH0: not modelled */

    /* VE_NORFLASH0ALIAS: not modelled */

    /* VE_NORFLASH1: not modelled */

    sram_size = 0x2000000;

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

    vmstate_register_ram_global(sram);

    memory_region_add_subregion(sysmem, map[VE_SRAM], sram);

    vram_size = 0x800000;

    memory_region_init_ram(vram, "vexpress.vram", vram_size);

    vmstate_register_ram_global(vram);

    memory_region_add_subregion(sysmem, map[VE_VIDEORAM], vram);

    /* 0x4e000000 LAN9118 Ethernet */

    if (nd_table[0].used) {

        lan9118_init(&nd_table[0], map[VE_ETHERNET], pic[15]);

    }

    /* VE_USB: not modelled */

    /* VE_DAPROM: not modelled */

    vexpress_binfo.ram_size = ram_size;

    vexpress_binfo.kernel_filename = kernel_filename;

    vexpress_binfo.kernel_cmdline = kernel_cmdline;

    vexpress_binfo.initrd_filename = initrd_filename;

    vexpress_binfo.nb_cpus = smp_cpus;

    vexpress_binfo.board_id = VEXPRESS_BOARD_ID;

    vexpress_binfo.loader_start = daughterboard->loader_start;

    vexpress_binfo.smp_loader_start = map[VE_SRAM];

    vexpress_binfo.smp_bootreg_addr = map[VE_SYSREGS] + 0x30;

    vexpress_binfo.gic_cpu_if_addr = daughterboard->gic_cpu_if_addr;

    arm_load_kernel(arm_env_get_cpu(first_cpu), &vexpress_binfo);

}

static void vexpress_a9_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)

{

    vexpress_common_init(&a9_daughterboard,

                         ram_size, boot_device, kernel_filename,

                         kernel_cmdline, initrd_filename, cpu_model);

}

static void vexpress_a15_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)

{

    vexpress_common_init(&a15_daughterboard,

                         ram_size, boot_device, kernel_filename,

                         kernel_cmdline, initrd_filename, cpu_model);

}

static QEMUMachine vexpress_a9_machine = {

    .name = "vexpress-a9",

    .desc = "ARM Versatile Express for Cortex-A9",

    .init = vexpress_a9_init,

    .use_scsi = 1,

    .max_cpus = 4,

};

static QEMUMachine vexpress_a15_machine = {

    .name = "vexpress-a15",

    .desc = "ARM Versatile Express for Cortex-A15",

    .init = vexpress_a15_init,

    .use_scsi = 1,

    .max_cpus = 4,

};

static void vexpress_machine_init(void)

{

    qemu_register_machine(&vexpress_a9_machine);

    qemu_register_machine(&vexpress_a15_machine);

}

machine_init(vexpress_machine_init);