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 } 103