qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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boot.c (3245B)

      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 
     33 static 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 
     62 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
     63 {
     64     return addr - 0x80000000LL;
     65 }
     66 
     67 void 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 }