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/*

 * QEMU ETRAX System Emulator

 *

 * Copyright (c) 2007 Edgar E. Iglesias, Axis Communications AB.

 *

 * 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 "boards.h"

#include "sysemu.h"

#include "net.h"

#include "flash.h"

#include "etraxfs.h"

#define FLASH_SIZE 0x2000000

#define INTMEM_SIZE (128 * 1024)

static uint32_t bootstrap_pc;

static void main_cpu_reset(void *opaque)

{

    CPUState *env = opaque;

    cpu_reset(env);

    env->pc = bootstrap_pc;

}

static

void bareetraxfs_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)

{

    CPUState *env;

    qemu_irq *irq, *nmi; 

    void *etraxfs_dmac;

    struct etraxfs_dma_client *eth[2] = {NULL, NULL};

    int kernel_size;

    int i;

    ram_addr_t phys_ram;

    ram_addr_t phys_flash;

    ram_addr_t phys_intmem;

    /* init CPUs */

    if (cpu_model == NULL) {

        cpu_model = "crisv32";

    }

    env = cpu_init(cpu_model);

    qemu_register_reset(main_cpu_reset, env);

    /* allocate RAM */

    phys_ram = qemu_ram_alloc(ram_size);

    cpu_register_physical_memory(0x40000000, ram_size, phys_ram | IO_MEM_RAM);

    /* The ETRAX-FS has 128Kb on chip ram, the docs refer to it as the 

       internal memory.  */

    phys_intmem = qemu_ram_alloc(INTMEM_SIZE);

    cpu_register_physical_memory(0x38000000, INTMEM_SIZE,

                                 phys_intmem | IO_MEM_RAM);

    phys_flash = qemu_ram_alloc(FLASH_SIZE);

    i = drive_get_index(IF_PFLASH, 0, 0);

    pflash_cfi02_register(0x0, phys_flash,

                          i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024),

                          FLASH_SIZE >> 16,

                          1, 2, 0x0000, 0x0000, 0x0000, 0x0000,

                          0x555, 0x2aa);

    irq = etraxfs_pic_init(env, 0x3001c000);

    nmi = irq + 30;

    etraxfs_dmac = etraxfs_dmac_init(env, 0x30000000, 10);

    for (i = 0; i < 10; i++) {

        /* On ETRAX, odd numbered channels are inputs.  */

        etraxfs_dmac_connect(etraxfs_dmac, i, irq + 7 + i, i & 1);

    }

    /* Add the two ethernet blocks.  */

    eth[0] = etraxfs_eth_init(&nd_table[0], env, 0x30034000, 1);

    if (nb_nics > 1)

        eth[1] = etraxfs_eth_init(&nd_table[1], env, 0x30036000, 2);

    /* The DMA Connector block is missing, hardwire things for now.  */

    etraxfs_dmac_connect_client(etraxfs_dmac, 0, eth[0]);

    etraxfs_dmac_connect_client(etraxfs_dmac, 1, eth[0] + 1);

    if (eth[1]) {

        etraxfs_dmac_connect_client(etraxfs_dmac, 6, eth[1]);

        etraxfs_dmac_connect_client(etraxfs_dmac, 7, eth[1] + 1);

    }

    /* 2 timers.  */

    sysbus_create_varargs("etraxfs,timer", 0x3001e000, irq[0x1b], nmi[1], NULL);

    sysbus_create_varargs("etraxfs,timer", 0x3005e000, irq[0x1b], nmi[1], NULL);

    for (i = 0; i < 4; i++) {

        sysbus_create_simple("etraxfs,serial", 0x30026000 + i * 0x2000,

                             irq[0x14 + i]); 

    }

    if (kernel_filename) {

        uint64_t entry, high;

        int kcmdline_len;

        /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 

           devboard SDK.  */

        kernel_size = load_elf(kernel_filename, -0x80000000LL,

                               &entry, NULL, &high);

        bootstrap_pc = entry;

        if (kernel_size < 0) {

            /* Takes a kimage from the axis devboard SDK.  */

            kernel_size = load_image_targphys(kernel_filename, 0x40004000,

                                              ram_size);

            bootstrap_pc = 0x40004000;

            env->regs[9] = 0x40004000 + kernel_size;

        }

        env->regs[8] = 0x56902387; /* RAM init magic.  */

        if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {

            if (kcmdline_len > 256) {

                fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");

                exit(1);

            }

            /* Let the kernel know we are modifying the cmdline.  */

            env->regs[10] = 0x87109563;

            env->regs[11] = 0x40000000;

            pstrcpy_targphys(env->regs[11], 256, kernel_cmdline);

        }

    }

    env->pc = bootstrap_pc;

    printf ("pc =%x\n", env->pc);

    printf ("ram size =%ld\n", ram_size);

}

QEMUMachine bareetraxfs_machine = {

    .name = "bareetraxfs",

    .desc = "Bare ETRAX FS board",

    .init = bareetraxfs_init,

};