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/*

 * Model of Xilinx Virtex5 ML507 PPC-440 refdesign.

 *

 * Copyright (c) 2010 Edgar E. Iglesias.

 *

 * 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 "sysbus.h"

#include "hw.h"

#include "serial.h"

#include "net.h"

#include "flash.h"

#include "sysemu.h"

#include "devices.h"

#include "boards.h"

#include "device_tree.h"

#include "loader.h"

#include "elf.h"

#include "qemu-log.h"

#include "exec-memory.h"

#include "ppc.h"

#include "ppc4xx.h"

#include "ppc405.h"

#include "blockdev.h"

#include "xilinx.h"

#define EPAPR_MAGIC    (0x45504150)

#define FLASH_SIZE     (16 * 1024 * 1024)

static struct boot_info

{

    uint32_t bootstrap_pc;

    uint32_t cmdline;

    uint32_t fdt;

    uint32_t ima_size;

    void *vfdt;

} boot_info;

/* Create reset TLB entries for BookE, spanning the 32bit addr space.  */

static void mmubooke_create_initial_mapping(CPUPPCState *env,

                                     target_ulong va,

                                     hwaddr pa)

{

    ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];

    tlb->attr = 0;

    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);

    tlb->size = 1 << 31; /* up to 0x80000000  */

    tlb->EPN = va & TARGET_PAGE_MASK;

    tlb->RPN = pa & TARGET_PAGE_MASK;

    tlb->PID = 0;

    tlb = &env->tlb.tlbe[1];

    tlb->attr = 0;

    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);

    tlb->size = 1 << 31; /* up to 0xffffffff  */

    tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;

    tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;

    tlb->PID = 0;

}

static PowerPCCPU *ppc440_init_xilinx(ram_addr_t *ram_size,

                                      int do_init,

                                      const char *cpu_model,

                                      uint32_t sysclk)

{

    PowerPCCPU *cpu;

    CPUPPCState *env;

    qemu_irq *irqs;

    cpu = cpu_ppc_init(cpu_model);

    if (cpu == NULL) {

        fprintf(stderr, "Unable to initialize CPU!\n");

        exit(1);

    }

    env = &cpu->env;

    ppc_booke_timers_init(env, sysclk, 0/* no flags */);

    ppc_dcr_init(env, NULL, NULL);

    /* interrupt controller */

    irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);

    irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];

    irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];

    ppcuic_init(env, irqs, 0x0C0, 0, 1);

    return cpu;

}

static void main_cpu_reset(void *opaque)

{

    PowerPCCPU *cpu = opaque;

    CPUPPCState *env = &cpu->env;

    struct boot_info *bi = env->load_info;

    cpu_reset(CPU(cpu));

    /* Linux Kernel Parameters (passing device tree):

       *   r3: pointer to the fdt

       *   r4: 0

       *   r5: 0

       *   r6: epapr magic

       *   r7: size of IMA in bytes

       *   r8: 0

       *   r9: 0

    */

    env->gpr[1] = (16<<20) - 8;

    /* Provide a device-tree.  */

    env->gpr[3] = bi->fdt;

    env->nip = bi->bootstrap_pc;

    /* Create a mapping for the kernel.  */

    mmubooke_create_initial_mapping(env, 0, 0);

    env->gpr[6] = tswap32(EPAPR_MAGIC);

    env->gpr[7] = bi->ima_size;

}

#define BINARY_DEVICE_TREE_FILE "virtex-ml507.dtb"

static int xilinx_load_device_tree(hwaddr addr,

                                      uint32_t ramsize,

                                      hwaddr initrd_base,

                                      hwaddr initrd_size,

                                      const char *kernel_cmdline)

{

    char *path;

    int fdt_size;

#ifdef CONFIG_FDT

    void *fdt;

    int r;

    /* Try the local "ppc.dtb" override.  */

    fdt = load_device_tree("ppc.dtb", &fdt_size);

    if (!fdt) {

        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);

        if (path) {

            fdt = load_device_tree(path, &fdt_size);

            g_free(path);

        }

        if (!fdt) {

            return 0;

        }

    }

    r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);

    if (r < 0)

        fprintf(stderr, "couldn't set /chosen/bootargs\n");

    cpu_physical_memory_write (addr, (void *)fdt, fdt_size);

#else

    /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob

       to the kernel.  */

    fdt_size = load_image_targphys("ppc.dtb", addr, 0x10000);

    if (fdt_size < 0) {

        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);

        if (path) {

            fdt_size = load_image_targphys(path, addr, 0x10000);

            g_free(path);

        }

    }

    if (kernel_cmdline) {

        fprintf(stderr,

                "Warning: missing libfdt, cannot pass cmdline to kernel!\n");

    }

#endif

    return fdt_size;

}

static void virtex_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;

    MemoryRegion *address_space_mem = get_system_memory();

    DeviceState *dev;

    PowerPCCPU *cpu;

    CPUPPCState *env;

    hwaddr ram_base = 0;

    DriveInfo *dinfo;

    MemoryRegion *phys_ram = g_new(MemoryRegion, 1);

    qemu_irq irq[32], *cpu_irq;

    int kernel_size;

    int i;

    /* init CPUs */

    if (cpu_model == NULL) {

        cpu_model = "440-Xilinx";

    }

    cpu = ppc440_init_xilinx(&ram_size, 1, cpu_model, 400000000);

    env = &cpu->env;

    qemu_register_reset(main_cpu_reset, cpu);

    memory_region_init_ram(phys_ram, "ram", ram_size);

    vmstate_register_ram_global(phys_ram);

    memory_region_add_subregion(address_space_mem, ram_base, phys_ram);

    dinfo = drive_get(IF_PFLASH, 0, 0);

    pflash_cfi01_register(0xfc000000, NULL, "virtex.flash", FLASH_SIZE,

                          dinfo ? dinfo->bdrv : NULL, (64 * 1024),

                          FLASH_SIZE >> 16,

                          1, 0x89, 0x18, 0x0000, 0x0, 1);

    cpu_irq = (qemu_irq *) &env->irq_inputs[PPC40x_INPUT_INT];

    dev = xilinx_intc_create(0x81800000, cpu_irq[0], 0);

    for (i = 0; i < 32; i++) {

        irq[i] = qdev_get_gpio_in(dev, i);

    }

    serial_mm_init(address_space_mem, 0x83e01003ULL, 2, irq[9], 115200,

                   serial_hds[0], DEVICE_LITTLE_ENDIAN);

    /* 2 timers at irq 2 @ 62 Mhz.  */

    xilinx_timer_create(0x83c00000, irq[3], 0, 62 * 1000000);

    if (kernel_filename) {

        uint64_t entry, low, high;

        hwaddr boot_offset;

        /* Boots a kernel elf binary.  */

        kernel_size = load_elf(kernel_filename, NULL, NULL,

                               &entry, &low, &high, 1, ELF_MACHINE, 0);

        boot_info.bootstrap_pc = entry & 0x00ffffff;

        if (kernel_size < 0) {

            boot_offset = 0x1200000;

            /* If we failed loading ELF's try a raw image.  */

            kernel_size = load_image_targphys(kernel_filename,

                                              boot_offset,

                                              ram_size);

            boot_info.bootstrap_pc = boot_offset;

            high = boot_info.bootstrap_pc + kernel_size + 8192;

        }

        boot_info.ima_size = kernel_size;

        /* Provide a device-tree.  */

        boot_info.fdt = high + (8192 * 2);

        boot_info.fdt &= ~8191;

        xilinx_load_device_tree(boot_info.fdt, ram_size, 0, 0, kernel_cmdline);

    }

    env->load_info = &boot_info;

}

static QEMUMachine virtex_machine = {

    .name = "virtex-ml507",

    .desc = "Xilinx Virtex ML507 reference design",

    .init = virtex_init,

};

static void virtex_machine_init(void)

{

    qemu_register_machine(&virtex_machine);

}

machine_init(virtex_machine_init);