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 "hw/hw.h" 26 #include "hw/loader.h" 27 #include "elf.h" 28 #include "hw/cris-boot.h" 29 30 static void main_cpu_reset(void *opaque) 31 { 32 CRISCPU *cpu = opaque; 33 CPUCRISState *env = &cpu->env; 34 struct cris_load_info *li; 35 36 li = env->load_info; 37 38 cpu_reset(CPU(cpu)); 39 40 if (!li) { 41 /* nothing more to do. */ 42 return; 43 } 44 45 env->pc = li->entry; 46 47 if (li->image_filename) { 48 env->regs[8] = 0x56902387; /* RAM boot magic. */ 49 env->regs[9] = 0x40004000 + li->image_size; 50 } 51 52 if (li->cmdline) { 53 /* Let the kernel know we are modifying the cmdline. */ 54 env->regs[10] = 0x87109563; 55 env->regs[11] = 0x40000000; 56 } 57 } 58 59 static uint64_t translate_kernel_address(void *opaque, uint64_t addr) 60 { 61 return addr - 0x80000000LL; 62 } 63 64 void cris_load_image(CRISCPU *cpu, struct cris_load_info *li) 65 { 66 CPUCRISState *env = &cpu->env; 67 uint64_t entry, high; 68 int kcmdline_len; 69 int image_size; 70 71 env->load_info = li; 72 /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 73 devboard SDK. */ 74 image_size = load_elf(li->image_filename, translate_kernel_address, NULL, 75 &entry, NULL, &high, 0, ELF_MACHINE, 0); 76 li->entry = entry; 77 if (image_size < 0) { 78 /* Takes a kimage from the axis devboard SDK. */ 79 image_size = load_image_targphys(li->image_filename, 0x40004000, 80 ram_size); 81 li->entry = 0x40004000; 82 } 83 84 if (image_size < 0) { 85 fprintf(stderr, "qemu: could not load kernel '%s'\n", 86 li->image_filename); 87 exit(1); 88 } 89 90 if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) { 91 if (kcmdline_len > 256) { 92 fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n"); 93 exit(1); 94 } 95 pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline); 96 } 97 qemu_register_reset(main_cpu_reset, cpu); 98 } 99