LXR qemu/hw/cris/boot.c

   1/*
   2 * CRIS image loading.
   3 *
   4 * Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB.
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25#include "qemu/osdep.h"
  26#include "qemu-common.h"
  27#include "cpu.h"
  28#include "hw/hw.h"
  29#include "hw/loader.h"
  30#include "elf.h"
  31#include "boot.h"
  32#include "qemu/cutils.h"
  33
  34static void main_cpu_reset(void *opaque)
  35{
  36    CRISCPU *cpu = opaque;
  37    CPUCRISState *env = &cpu->env;
  38    struct cris_load_info *li;
  39
  40    li = env->load_info;
  41
  42    cpu_reset(CPU(cpu));
  43
  44    if (!li) {
  45        /* nothing more to do.  */
  46        return;
  47    }
  48
  49    env->pc = li->entry;
  50
  51    if (li->image_filename) {
  52        env->regs[8] = 0x56902387; /* RAM boot magic.  */
  53        env->regs[9] = 0x40004000 + li->image_size;
  54    }
  55
  56    if (li->cmdline) {
  57        /* Let the kernel know we are modifying the cmdline.  */
  58        env->regs[10] = 0x87109563;
  59        env->regs[11] = 0x40000000;
  60    }
  61}
  62
  63static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
  64{
  65    return addr - 0x80000000LL;
  66}
  67
  68void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
  69{
  70    CPUCRISState *env = &cpu->env;
  71    uint64_t entry, high;
  72    int kcmdline_len;
  73    int image_size;
  74
  75    env->load_info = li;
  76    /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
  77       devboard SDK.  */
  78    image_size = load_elf(li->image_filename, translate_kernel_address, NULL,
  79                          &entry, NULL, &high, 0, EM_CRIS, 0, 0);
  80    li->entry = entry;
  81    if (image_size < 0) {
  82        /* Takes a kimage from the axis devboard SDK.  */
  83        image_size = load_image_targphys(li->image_filename, 0x40004000,
  84                                         ram_size);
  85        li->entry = 0x40004000;
  86    }
  87
  88    if (image_size < 0) {
  89        fprintf(stderr, "qemu: could not load kernel '%s'\n",
  90                li->image_filename);
  91        exit(1);
  92    }
  93
  94    if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) {
  95        if (kcmdline_len > 256) {
  96            fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");
  97            exit(1);
  98        }
  99        pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline);
 100    }
 101    qemu_register_reset(main_cpu_reset, cpu);
 102}
 103