diff options
Diffstat (limited to 'hw/cris/boot.c')
-rw-r--r-- | hw/cris/boot.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/hw/cris/boot.c b/hw/cris/boot.c new file mode 100644 index 0000000000..c330e22a86 --- /dev/null +++ b/hw/cris/boot.c @@ -0,0 +1,98 @@ +/* + * CRIS image loading. + * + * Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "hw/hw.h" +#include "hw/loader.h" +#include "elf.h" +#include "hw/cris-boot.h" + +static void main_cpu_reset(void *opaque) +{ + CRISCPU *cpu = opaque; + CPUCRISState *env = &cpu->env; + struct cris_load_info *li; + + li = env->load_info; + + cpu_reset(CPU(cpu)); + + if (!li) { + /* nothing more to do. */ + return; + } + + env->pc = li->entry; + + if (li->image_filename) { + env->regs[8] = 0x56902387; /* RAM boot magic. */ + env->regs[9] = 0x40004000 + li->image_size; + } + + if (li->cmdline) { + /* Let the kernel know we are modifying the cmdline. */ + env->regs[10] = 0x87109563; + env->regs[11] = 0x40000000; + } +} + +static uint64_t translate_kernel_address(void *opaque, uint64_t addr) +{ + return addr - 0x80000000LL; +} + +void cris_load_image(CRISCPU *cpu, struct cris_load_info *li) +{ + CPUCRISState *env = &cpu->env; + uint64_t entry, high; + int kcmdline_len; + int image_size; + + env->load_info = li; + /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis + devboard SDK. */ + image_size = load_elf(li->image_filename, translate_kernel_address, NULL, + &entry, NULL, &high, 0, ELF_MACHINE, 0); + li->entry = entry; + if (image_size < 0) { + /* Takes a kimage from the axis devboard SDK. */ + image_size = load_image_targphys(li->image_filename, 0x40004000, + ram_size); + li->entry = 0x40004000; + } + + if (image_size < 0) { + fprintf(stderr, "qemu: could not load kernel '%s'\n", + li->image_filename); + exit(1); + } + + if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) { + if (kcmdline_len > 256) { + fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n"); + exit(1); + } + pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline); + } + qemu_register_reset(main_cpu_reset, cpu); +} |