diff options
Diffstat (limited to 'common/image.c')
| -rw-r--r-- | common/image.c | 118 |
1 files changed, 109 insertions, 9 deletions
diff --git a/common/image.c b/common/image.c index 56d6b52..39e5f23 100644 --- a/common/image.c +++ b/common/image.c @@ -42,9 +42,15 @@ #endif extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); + +#ifdef CONFIG_CMD_BDI +extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); +#endif + +DECLARE_GLOBAL_DATA_PTR; #else #include "mkimage.h" -#endif +#endif /* USE_HOSTCC*/ #include <image.h> @@ -501,17 +507,19 @@ void get_ramdisk (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], * variable and if requested ramdisk data is moved to a specified location. * * returns: - * initrd_start and initrd_end are set to final (after relocation) ramdisk + * - initrd_start and initrd_end are set to final (after relocation) ramdisk * start/end addresses if ramdisk image start and len were provided - * otherwise set initrd_start and initrd_end to zeros - * + * otherwise set initrd_start and initrd_end set to zeros + * - returns new allc_current, next free address below BOOTMAPSZ */ -void ramdisk_high (ulong rd_data, ulong rd_len, bd_t *kbd, ulong sp_limit, - ulong sp, ulong *initrd_start, ulong *initrd_end) +ulong ramdisk_high (ulong alloc_current, ulong rd_data, ulong rd_len, + bd_t *kbd, ulong sp_limit, ulong sp, + ulong *initrd_start, ulong *initrd_end) { char *s; ulong initrd_high; int initrd_copy_to_ram = 1; + ulong new_alloc_current = alloc_current; if ((s = getenv ("initrd_high")) != NULL) { /* a value of "no" or a similar string will act like 0, @@ -540,7 +548,8 @@ void ramdisk_high (ulong rd_data, ulong rd_len, bd_t *kbd, ulong sp_limit, *initrd_start = rd_data; *initrd_end = rd_data + rd_len; } else { - *initrd_start = (ulong)kbd - rd_len; + new_alloc_current = alloc_current - rd_len; + *initrd_start = new_alloc_current; *initrd_start &= ~(4096 - 1); /* align on page */ if (initrd_high) { @@ -566,8 +575,10 @@ void ramdisk_high (ulong rd_data, ulong rd_len, bd_t *kbd, ulong sp_limit, nsp -= rd_len; nsp &= ~(4096 - 1); /* align on page */ - if (nsp >= sp_limit) + if (nsp >= sp_limit) { *initrd_start = nsp; + new_alloc_current = alloc_current; + } } show_boot_progress (12); @@ -587,7 +598,96 @@ void ramdisk_high (ulong rd_data, ulong rd_len, bd_t *kbd, ulong sp_limit, } debug (" ramdisk load start = 0x%08lx, ramdisk load end = 0x%08lx\n", *initrd_start, *initrd_end); + + return new_alloc_current; +} + +/** + * get_boot_sp_limit - calculate stack pointer limit + * @sp: current stack pointer + * + * get_boot_sp_limit() takes current stack pointer adrress and calculates + * stack pointer limit, below which kernel boot data (cmdline, board info, + * etc.) will be allocated. + * + * returns: + * stack pointer limit + */ +ulong get_boot_sp_limit(ulong sp) +{ + ulong sp_limit = sp; + + sp_limit -= 2048; /* just to be sure */ + + /* make sure sp_limit is within kernel mapped space */ + if (sp_limit > CFG_BOOTMAPSZ) + sp_limit = CFG_BOOTMAPSZ; + sp_limit &= ~0xF; + + return sp_limit; +} + +/** + * get_boot_cmdline - allocate and initialize kernel cmdline + * @alloc_current: current boot allocation address (counting down + * from sp_limit) + * @cmd_start: pointer to a ulong variable, will hold cmdline start + * @cmd_end: pointer to a ulong variable, will hold cmdline end + * + * get_boot_cmdline() allocates space for kernel command line below + * provided alloc_current address. If "bootargs" U-boot environemnt + * variable is present its contents is copied to allocated kernel + * command line. + * + * returns: + * alloc_current after cmdline allocation + */ +ulong get_boot_cmdline (ulong alloc_current, ulong *cmd_start, ulong *cmd_end) +{ + char *cmdline; + char *s; + + cmdline = (char *)((alloc_current - CFG_BARGSIZE) & ~0xF); + + if ((s = getenv("bootargs")) == NULL) + s = ""; + + strcpy(cmdline, s); + + *cmd_start = (ulong) & cmdline[0]; + *cmd_end = *cmd_start + strlen(cmdline); + + debug ("## cmdline at 0x%08lx ... 0x%08lx\n", *cmd_start, *cmd_end); + + return (ulong)cmdline; +} + +/** + * get_boot_kbd - allocate and initialize kernel copy of board info + * @alloc_current: current boot allocation address (counting down + * from sp_limit) + * @kbd: double pointer to board info data + * + * get_boot_kbd() - allocates space for kernel copy of board info data. + * Space is allocated below provided alloc_current address and kernel + * board info is initialized with the current u-boot board info data. + * + * returns: + * alloc_current after kbd allocation + */ +ulong get_boot_kbd (ulong alloc_current, bd_t **kbd) +{ + *kbd = (bd_t *) (((ulong)alloc_current - sizeof(bd_t)) & ~0xF); + **kbd = *(gd->bd); + + debug ("## kernel board info at 0x%08lx\n", (ulong)*kbd); + +#if defined(DEBUG) && defined(CONFIG_CMD_BDI) + do_bdinfo(NULL, 0, 0, NULL); +#endif + + return (ulong)*kbd; } #endif /* CONFIG_PPC || CONFIG_M68K */ -#endif /* USE_HOSTCC */ +#endif /* USE_HOSTCC */ |