diff options
Diffstat (limited to 'qemu/roms/u-boot/arch/mips/lib/bootm.c')
| -rw-r--r-- | qemu/roms/u-boot/arch/mips/lib/bootm.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/arch/mips/lib/bootm.c b/qemu/roms/u-boot/arch/mips/lib/bootm.c new file mode 100644 index 000000000..71bb0d2a1 --- /dev/null +++ b/qemu/roms/u-boot/arch/mips/lib/bootm.c @@ -0,0 +1,252 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <image.h> +#include <u-boot/zlib.h> +#include <asm/byteorder.h> +#include <asm/addrspace.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define LINUX_MAX_ENVS 256 +#define LINUX_MAX_ARGS 256 + +#if defined(CONFIG_MALTA) +#define mips_boot_malta 1 +#else +#define mips_boot_malta 0 +#endif + +static int linux_argc; +static char **linux_argv; +static char *linux_argp; + +static char **linux_env; +static char *linux_env_p; +static int linux_env_idx; + +static ulong arch_get_sp(void) +{ + ulong ret; + + __asm__ __volatile__("move %0, $sp" : "=r"(ret) : ); + + return ret; +} + +void arch_lmb_reserve(struct lmb *lmb) +{ + ulong sp; + + sp = arch_get_sp(); + debug("## Current stack ends at 0x%08lx\n", sp); + + /* adjust sp by 4K to be safe */ + sp -= 4096; + lmb_reserve(lmb, sp, CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp); +} + +static void linux_cmdline_init(void) +{ + linux_argc = 1; + linux_argv = (char **)UNCACHED_SDRAM(gd->bd->bi_boot_params); + linux_argv[0] = 0; + linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS); +} + +static void linux_cmdline_set(const char *value, size_t len) +{ + linux_argv[linux_argc] = linux_argp; + memcpy(linux_argp, value, len); + linux_argp[len] = 0; + + linux_argp += len + 1; + linux_argc++; +} + +static void linux_cmdline_dump(void) +{ + int i; + + debug("## cmdline argv at 0x%p, argp at 0x%p\n", + linux_argv, linux_argp); + + for (i = 1; i < linux_argc; i++) + debug(" arg %03d: %s\n", i, linux_argv[i]); +} + +static void boot_cmdline_linux(bootm_headers_t *images) +{ + const char *bootargs, *next, *quote; + + linux_cmdline_init(); + + bootargs = getenv("bootargs"); + if (!bootargs) + return; + + next = bootargs; + + while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) { + quote = strchr(bootargs, '"'); + next = strchr(bootargs, ' '); + + while (next && quote && quote < next) { + /* + * we found a left quote before the next blank + * now we have to find the matching right quote + */ + next = strchr(quote + 1, '"'); + if (next) { + quote = strchr(next + 1, '"'); + next = strchr(next + 1, ' '); + } + } + + if (!next) + next = bootargs + strlen(bootargs); + + linux_cmdline_set(bootargs, next - bootargs); + + if (*next) + next++; + + bootargs = next; + } + + linux_cmdline_dump(); +} + +static void linux_env_init(void) +{ + linux_env = (char **)(((ulong) linux_argp + 15) & ~15); + linux_env[0] = 0; + linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS); + linux_env_idx = 0; +} + +static void linux_env_set(const char *env_name, const char *env_val) +{ + if (linux_env_idx < LINUX_MAX_ENVS - 1) { + linux_env[linux_env_idx] = linux_env_p; + + strcpy(linux_env_p, env_name); + linux_env_p += strlen(env_name); + + if (mips_boot_malta) { + linux_env_p++; + linux_env[++linux_env_idx] = linux_env_p; + } else { + *linux_env_p++ = '='; + } + + strcpy(linux_env_p, env_val); + linux_env_p += strlen(env_val); + + linux_env_p++; + linux_env[++linux_env_idx] = 0; + } +} + +static void boot_prep_linux(bootm_headers_t *images) +{ + char env_buf[12]; + const char *cp; + ulong rd_start, rd_size; + +#ifdef CONFIG_MEMSIZE_IN_BYTES + sprintf(env_buf, "%lu", (ulong)gd->ram_size); + debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size); +#else + sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20)); + debug("## Giving linux memsize in MB, %lu\n", + (ulong)(gd->ram_size >> 20)); +#endif /* CONFIG_MEMSIZE_IN_BYTES */ + + rd_start = UNCACHED_SDRAM(images->initrd_start); + rd_size = images->initrd_end - images->initrd_start; + + linux_env_init(); + + linux_env_set("memsize", env_buf); + + sprintf(env_buf, "0x%08lX", rd_start); + linux_env_set("initrd_start", env_buf); + + sprintf(env_buf, "0x%lX", rd_size); + linux_env_set("initrd_size", env_buf); + + sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); + linux_env_set("flash_start", env_buf); + + sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); + linux_env_set("flash_size", env_buf); + + cp = getenv("ethaddr"); + if (cp) + linux_env_set("ethaddr", cp); + + cp = getenv("eth1addr"); + if (cp) + linux_env_set("eth1addr", cp); + + if (mips_boot_malta) { + sprintf(env_buf, "%un8r", gd->baudrate); + linux_env_set("modetty0", env_buf); + } +} + +static void boot_jump_linux(bootm_headers_t *images) +{ + typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong); + kernel_entry_t kernel = (kernel_entry_t) images->ep; + ulong linux_extra = 0; + + debug("## Transferring control to Linux (at address %p) ...\n", kernel); + + bootstage_mark(BOOTSTAGE_ID_RUN_OS); + + if (mips_boot_malta) + linux_extra = gd->ram_size; + + /* we assume that the kernel is in place */ + printf("\nStarting kernel ...\n\n"); + + kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env, linux_extra); +} + +int do_bootm_linux(int flag, int argc, char * const argv[], + bootm_headers_t *images) +{ + /* No need for those on MIPS */ + if (flag & BOOTM_STATE_OS_BD_T) + return -1; + + if (flag & BOOTM_STATE_OS_CMDLINE) { + boot_cmdline_linux(images); + return 0; + } + + if (flag & BOOTM_STATE_OS_PREP) { + boot_prep_linux(images); + return 0; + } + + if (flag & BOOTM_STATE_OS_GO) { + boot_jump_linux(images); + return 0; + } + + boot_cmdline_linux(images); + boot_prep_linux(images); + boot_jump_linux(images); + + /* does not return */ + return 1; +} |