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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:30:32 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 19:30:32 -0800 |
commit | 8b23a6c7e1aee255004dd19098d4c2462b61b849 (patch) | |
tree | 7a4d682ba51f0ff0364c5ca2509f515bdaf96de9 /hw/arm_boot.c | |
parent | f721e3ac031f892af46f255a47d7f54a91317b30 (diff) | |
download | external_qemu-8b23a6c7e1aee255004dd19098d4c2462b61b849.zip external_qemu-8b23a6c7e1aee255004dd19098d4c2462b61b849.tar.gz external_qemu-8b23a6c7e1aee255004dd19098d4c2462b61b849.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'hw/arm_boot.c')
-rw-r--r-- | hw/arm_boot.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/hw/arm_boot.c b/hw/arm_boot.c new file mode 100644 index 0000000..5990961 --- /dev/null +++ b/hw/arm_boot.c @@ -0,0 +1,251 @@ +/* + * ARM kernel loader. + * + * Copyright (c) 2006-2007 CodeSourcery. + * Written by Paul Brook + * + * This code is licenced under the GPL. + */ + +#include "hw.h" +#include "arm-misc.h" +#include "sysemu.h" + +#define KERNEL_ARGS_ADDR 0x100 +#define KERNEL_LOAD_ADDR 0x00010000 +#define INITRD_LOAD_ADDR 0x00800000 + +/* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */ +static uint32_t bootloader[] = { + 0xe3a00000, /* mov r0, #0 */ + 0xe3a01000, /* mov r1, #0x?? */ + 0xe3811c00, /* orr r1, r1, #0x??00 */ + 0xe59f2000, /* ldr r2, [pc, #0] */ + 0xe59ff000, /* ldr pc, [pc, #0] */ + 0, /* Address of kernel args. Set by integratorcp_init. */ + 0 /* Kernel entry point. Set by integratorcp_init. */ +}; + +/* Entry point for secondary CPUs. Enable interrupt controller and + Issue WFI until start address is written to system controller. */ +static uint32_t smpboot[] = { + 0xe3a00201, /* mov r0, #0x10000000 */ + 0xe3800601, /* orr r0, r0, #0x001000000 */ + 0xe3a01001, /* mov r1, #1 */ + 0xe5801100, /* str r1, [r0, #0x100] */ + 0xe3a00201, /* mov r0, #0x10000000 */ + 0xe3800030, /* orr r0, #0x30 */ + 0xe320f003, /* wfi */ + 0xe5901000, /* ldr r1, [r0] */ + 0xe3110003, /* tst r1, #3 */ + 0x1afffffb, /* bne <wfi> */ + 0xe12fff11 /* bx r1 */ +}; + +static void main_cpu_reset(void *opaque) +{ + CPUState *env = opaque; + + cpu_reset(env); + if (env->boot_info) + arm_load_kernel(env, env->boot_info); + + /* TODO: Reset secondary CPUs. */ +} + +static void set_kernel_args(struct arm_boot_info *info, + int initrd_size, void *base) +{ + uint32_t *p; + + p = (uint32_t *)(base + KERNEL_ARGS_ADDR); + /* ATAG_CORE */ + stl_raw(p++, 5); + stl_raw(p++, 0x54410001); + stl_raw(p++, 1); + stl_raw(p++, 0x1000); + stl_raw(p++, 0); + /* ATAG_MEM */ + /* TODO: handle multiple chips on one ATAG list */ + stl_raw(p++, 4); + stl_raw(p++, 0x54410002); + stl_raw(p++, info->ram_size); + stl_raw(p++, info->loader_start); + if (initrd_size) { + /* ATAG_INITRD2 */ + stl_raw(p++, 4); + stl_raw(p++, 0x54420005); + stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR); + stl_raw(p++, initrd_size); + } + if (info->kernel_cmdline && *info->kernel_cmdline) { + /* ATAG_CMDLINE */ + int cmdline_size; + + cmdline_size = strlen(info->kernel_cmdline); + memcpy(p + 2, info->kernel_cmdline, cmdline_size + 1); + cmdline_size = (cmdline_size >> 2) + 1; + stl_raw(p++, cmdline_size + 2); + stl_raw(p++, 0x54410009); + p += cmdline_size; + } + if (info->atag_board) { + /* ATAG_BOARD */ + int atag_board_len; + + atag_board_len = (info->atag_board(info, p + 2) + 3) >> 2; + stl_raw(p++, 2 + atag_board_len); + stl_raw(p++, 0x414f4d50); + p += atag_board_len; + } + /* ATAG_END */ + stl_raw(p++, 0); + stl_raw(p++, 0); +} + +static void set_kernel_args_old(struct arm_boot_info *info, + int initrd_size, void *base) +{ + uint32_t *p; + unsigned char *s; + + /* see linux/include/asm-arm/setup.h */ + p = (uint32_t *)(base + KERNEL_ARGS_ADDR); + /* page_size */ + stl_raw(p++, 4096); + /* nr_pages */ + stl_raw(p++, info->ram_size / 4096); + /* ramdisk_size */ + stl_raw(p++, 0); +#define FLAG_READONLY 1 +#define FLAG_RDLOAD 4 +#define FLAG_RDPROMPT 8 + /* flags */ + stl_raw(p++, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT); + /* rootdev */ + stl_raw(p++, (31 << 8) | 0); /* /dev/mtdblock0 */ + /* video_num_cols */ + stl_raw(p++, 0); + /* video_num_rows */ + stl_raw(p++, 0); + /* video_x */ + stl_raw(p++, 0); + /* video_y */ + stl_raw(p++, 0); + /* memc_control_reg */ + stl_raw(p++, 0); + /* unsigned char sounddefault */ + /* unsigned char adfsdrives */ + /* unsigned char bytes_per_char_h */ + /* unsigned char bytes_per_char_v */ + stl_raw(p++, 0); + /* pages_in_bank[4] */ + stl_raw(p++, 0); + stl_raw(p++, 0); + stl_raw(p++, 0); + stl_raw(p++, 0); + /* pages_in_vram */ + stl_raw(p++, 0); + /* initrd_start */ + if (initrd_size) + stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR); + else + stl_raw(p++, 0); + /* initrd_size */ + stl_raw(p++, initrd_size); + /* rd_start */ + stl_raw(p++, 0); + /* system_rev */ + stl_raw(p++, 0); + /* system_serial_low */ + stl_raw(p++, 0); + /* system_serial_high */ + stl_raw(p++, 0); + /* mem_fclk_21285 */ + stl_raw(p++, 0); + /* zero unused fields */ + memset(p, 0, 256 + 1024 - + (p - ((uint32_t *)(base + KERNEL_ARGS_ADDR)))); + s = base + KERNEL_ARGS_ADDR + 256 + 1024; + if (info->kernel_cmdline) + strcpy (s, info->kernel_cmdline); + else + stb_raw(s, 0); +} + +void arm_load_kernel(CPUState *env, struct arm_boot_info *info) +{ + int kernel_size; + int initrd_size; + int n; + int is_linux = 0; + uint64_t elf_entry; + target_ulong entry; + uint32_t pd; + void *loader_phys; + + /* Load the kernel. */ + if (!info->kernel_filename) { + fprintf(stderr, "Kernel image must be specified\n"); + exit(1); + } + + if (!env->boot_info) { + if (info->nb_cpus == 0) + info->nb_cpus = 1; + env->boot_info = info; + qemu_register_reset(main_cpu_reset, env); + } + + pd = cpu_get_physical_page_desc(info->loader_start); + loader_phys = phys_ram_base + (pd & TARGET_PAGE_MASK) + + (info->loader_start & ~TARGET_PAGE_MASK); + + /* Assume that raw images are linux kernels, and ELF images are not. */ + kernel_size = load_elf(info->kernel_filename, 0, &elf_entry, NULL, NULL); + entry = elf_entry; + if (kernel_size < 0) { + kernel_size = load_uboot(info->kernel_filename, &entry, &is_linux); + } + if (kernel_size < 0) { + kernel_size = load_image(info->kernel_filename, + loader_phys + KERNEL_LOAD_ADDR); + entry = info->loader_start + KERNEL_LOAD_ADDR; + is_linux = 1; + } + if (kernel_size < 0) { + fprintf(stderr, "qemu: could not load kernel '%s'\n", + info->kernel_filename); + exit(1); + } + if (!is_linux) { + /* Jump to the entry point. */ + env->regs[15] = entry & 0xfffffffe; + env->thumb = entry & 1; + } else { + if (info->initrd_filename) { + initrd_size = load_image(info->initrd_filename, + loader_phys + INITRD_LOAD_ADDR); + if (initrd_size < 0) { + fprintf(stderr, "qemu: could not load initrd '%s'\n", + info->initrd_filename); + exit(1); + } + } else { + initrd_size = 0; + } + bootloader[1] |= info->board_id & 0xff; + bootloader[2] |= (info->board_id >> 8) & 0xff; + bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR; + bootloader[6] = entry; + for (n = 0; n < sizeof(bootloader) / 4; n++) + stl_raw(loader_phys + (n * 4), bootloader[n]); + if (info->nb_cpus > 1) + for (n = 0; n < sizeof(smpboot) / 4; n++) + stl_raw(loader_phys + info->ram_size + (n * 4), smpboot[n]); + if (old_param) + set_kernel_args_old(info, initrd_size, loader_phys); + else + set_kernel_args(info, initrd_size, loader_phys); + } +} |