diff options
| author | Nobuhiro Iwamatsu | 2010-09-28 12:14:57 +0900 |
|---|---|---|
| committer | Nobuhiro Iwamatsu | 2010-10-21 10:42:23 +0900 |
| commit | cf2c87d3223901e329241f241c3402c6186e0d98 (patch) | |
| tree | ba4576df6e4dd93bfaa21497edd602402013d30d /arch/sh | |
| parent | c62491d2602b353a815a909e27eec0df9f2c06a2 (diff) | |
sh: Add support load and boot of Initrd.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/lib/bootm.c | 66 |
1 files changed, 65 insertions, 1 deletions
diff --git a/arch/sh/lib/bootm.c b/arch/sh/lib/bootm.c index 9c58ed7ec8c..019e8ec172a 100644 --- a/arch/sh/lib/bootm.c +++ b/arch/sh/lib/bootm.c @@ -43,6 +43,41 @@ static void hexdump(unsigned char *buf, int len) } #endif +#define MOUNT_ROOT_RDONLY 0x000 +#define RAMDISK_FLAGS 0x004 +#define ORIG_ROOT_DEV 0x008 +#define LOADER_TYPE 0x00c +#define INITRD_START 0x010 +#define INITRD_SIZE 0x014 +#define COMMAND_LINE 0x100 + +#define RD_PROMPT (1<<15) +#define RD_DOLOAD (1<<14) +#define CMD_ARG_RD_PROMPT "prompt_ramdisk=" +#define CMD_ARG_RD_DOLOAD "load_ramdisk=" + +#ifdef CONFIG_SH_SDRAM_OFFSET +#define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET) +#else +#define GET_INITRD_START(initrd, linux) (initrd - linux) +#endif + +static void set_sh_linux_param(unsigned long param_addr, unsigned long data) +{ + *(unsigned long *)(param_addr) = data; +} + +static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base) +{ + unsigned long val = 0; + char *p = strstr(cmdline, key); + if (p) { + p += strlen(key); + val = simple_strtol(p, NULL, base); + } + return val; +} + int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) { /* Linux kernel load address */ @@ -51,7 +86,7 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima unsigned char *param = (unsigned char *)image_get_load(images->legacy_hdr_os); /* Linux kernel command line */ - char *cmdline = (char *)param + 0x100; + char *cmdline = (char *)param + COMMAND_LINE; /* PAGE_SIZE */ unsigned long size = images->ep - (unsigned long)param; char *bootargs = getenv("bootargs"); @@ -61,8 +96,37 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima /* Setup parameters */ memset(param, 0, size); /* Clear zero page */ + + /* Set commandline */ strcpy(cmdline, bootargs); + sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10); + /* Initrd */ + if (images->rd_start || images->rd_end) { + unsigned long ramdisk_flags; + int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10); + if (val == 1) + ramdisk_flags |= RD_PROMPT; + else + ramdisk_flags &= ~RD_PROMPT; + + val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10); + if (val == 1) + ramdisk_flags |= RD_DOLOAD; + else + ramdisk_flags &= ~RD_DOLOAD; + + set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001); + set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags); + set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200); + set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001); + set_sh_linux_param((unsigned long)param + INITRD_START, + GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE)); + set_sh_linux_param((unsigned long)param + INITRD_SIZE, + images->rd_end - images->rd_start); + } + + /* Boot kernel */ kernel(); /* does not return */ |