qemu

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/*
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 * CRIS image loading.
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 *
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 * Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
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 */
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "hw/loader.h"
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#include "elf.h"
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#include "boot.h"
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#include "qemu/cutils.h"
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#include "sysemu/reset.h"
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static void main_cpu_reset(void *opaque)
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{
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    CRISCPU *cpu = opaque;
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    CPUCRISState *env = &cpu->env;
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    struct cris_load_info *li;
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    li = env->load_info;
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    cpu_reset(CPU(cpu));
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    if (!li) {
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        /* nothing more to do.  */
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        return;
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    }
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    env->pc = li->entry;
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    if (li->image_filename) {
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        env->regs[8] = 0x56902387; /* RAM boot magic.  */
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        env->regs[9] = 0x40004000 + li->image_size;
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    }
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    if (li->cmdline) {
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        /* Let the kernel know we are modifying the cmdline.  */
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        env->regs[10] = 0x87109563;
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        env->regs[11] = 0x40000000;
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    }
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}
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static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
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{
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    return addr - 0x80000000LL;
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}
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void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
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{
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    CPUCRISState *env = &cpu->env;
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    uint64_t entry;
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    int kcmdline_len;
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    int image_size;
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    env->load_info = li;
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    /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
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       devboard SDK.  */
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    image_size = load_elf(li->image_filename, NULL,
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                          translate_kernel_address, NULL,
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                          &entry, NULL, NULL, NULL, 0, EM_CRIS, 0, 0);
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    li->entry = entry;
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    if (image_size < 0) {
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        /* Takes a kimage from the axis devboard SDK.  */
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        image_size = load_image_targphys(li->image_filename, 0x40004000,
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                                         li->ram_size);
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        li->entry = 0x40004000;
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    }
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    if (image_size < 0) {
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        fprintf(stderr, "qemu: could not load kernel '%s'\n",
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                li->image_filename);
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        exit(1);
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    }
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    if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) {
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        if (kcmdline_len > 256) {
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            fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
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            exit(1);
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        }
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        pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline);
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    }
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    qemu_register_reset(main_cpu_reset, cpu);
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}
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