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 "hw/hw.h" 27 #include "hw/loader.h" 28 #include "elf.h" 29 #include "boot.h" 30 31 static void main_cpu_reset(void *opaque) 32 { 33 CRISCPU *cpu = opaque; 34 CPUCRISState *env = &cpu->env; 35 struct cris_load_info *li; 36 37 li = env->load_info; 38 39 cpu_reset(CPU(cpu)); 40 41 if (!li) { 42 /* nothing more to do. */ 43 return; 44 } 45 46 env->pc = li->entry; 47 48 if (li->image_filename) { 49 env->regs[8] = 0x56902387; /* RAM boot magic. */ 50 env->regs[9] = 0x40004000 + li->image_size; 51 } 52 53 if (li->cmdline) { 54 /* Let the kernel know we are modifying the cmdline. */ 55 env->regs[10] = 0x87109563; 56 env->regs[11] = 0x40000000; 57 } 58 } 59 60 static uint64_t translate_kernel_address(void *opaque, uint64_t addr) 61 { 62 return addr - 0x80000000LL; 63 } 64 65 void cris_load_image(CRISCPU *cpu, struct cris_load_info *li) 66 { 67 CPUCRISState *env = &cpu->env; 68 uint64_t entry, high; 69 int kcmdline_len; 70 int image_size; 71 72 env->load_info = li; 73 /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 74 devboard SDK. */ 75 image_size = load_elf(li->image_filename, translate_kernel_address, NULL, 76 &entry, NULL, &high, 0, EM_CRIS, 0); 77 li->entry = entry; 78 if (image_size < 0) { 79 /* Takes a kimage from the axis devboard SDK. */ 80 image_size = load_image_targphys(li->image_filename, 0x40004000, 81 ram_size); 82 li->entry = 0x40004000; 83 } 84 85 if (image_size < 0) { 86 fprintf(stderr, "qemu: could not load kernel '%s'\n", 87 li->image_filename); 88 exit(1); 89 } 90 91 if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) { 92 if (kcmdline_len > 256) { 93 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n"); 94 exit(1); 95 } 96 pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline); 97 } 98 qemu_register_reset(main_cpu_reset, cpu); 99 } 100