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 "cpu.h"
  27#include "hw/loader.h"
  28#include "elf.h"
  29#include "boot.h"
  30#include "qemu/cutils.h"
  31#include "sysemu/reset.h"
  32
  33static void main_cpu_reset(void *opaque)
  34{
  35    CRISCPU *cpu = opaque;
  36    CPUCRISState *env = &cpu->env;
  37    struct cris_load_info *li;
  38
  39    li = env->load_info;
  40
  41    cpu_reset(CPU(cpu));
  42
  43    if (!li) {
  44        /* nothing more to do.  */
  45        return;
  46    }
  47
  48    env->pc = li->entry;
  49
  50    if (li->image_filename) {
  51        env->regs[8] = 0x56902387; /* RAM boot magic.  */
  52        env->regs[9] = 0x40004000 + li->image_size;
  53    }
  54
  55    if (li->cmdline) {
  56        /* Let the kernel know we are modifying the cmdline.  */
  57        env->regs[10] = 0x87109563;
  58        env->regs[11] = 0x40000000;
  59    }
  60}
  61
  62static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
  63{
  64    return addr - 0x80000000LL;
  65}
  66
  67void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
  68{
  69    CPUCRISState *env = &cpu->env;
  70    uint64_t entry;
  71    int kcmdline_len;
  72    int image_size;
  73
  74    env->load_info = li;
  75    /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 
  76       devboard SDK.  */
  77    image_size = load_elf(li->image_filename, NULL,
  78                          translate_kernel_address, NULL,
  79                          &entry, NULL, NULL, NULL, 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                                         li->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