diff options
Diffstat (limited to 'lib_ppc')
| -rw-r--r-- | lib_ppc/bootm.c | 112 |
1 files changed, 26 insertions, 86 deletions
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c index 65edcdb..d73d2fd 100644 --- a/lib_ppc/bootm.c +++ b/lib_ppc/bootm.c @@ -43,10 +43,6 @@ static void fdt_error (const char *msg); #endif -#ifdef CONFIG_LOGBUFFER -#include <logbuff.h> -#endif - #ifdef CFG_INIT_RAM_LOCK #include <asm/cache.h> #endif @@ -54,9 +50,10 @@ static void fdt_error (const char *msg); DECLARE_GLOBAL_DATA_PTR; extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); +static ulong get_sp (void); #if defined(CONFIG_CMD_BDI) -extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); +extern int do_bdinfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); #endif void __attribute__((noinline)) @@ -65,15 +62,13 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, image_header_t *hdr, int verify) { - ulong initrd_high; - int initrd_copy_to_ram = 1; ulong initrd_start, initrd_end; ulong rd_data_start, rd_data_end, rd_len; ulong cmd_start, cmd_end; char *cmdline; - ulong sp; + ulong sp_limit; char *s; bd_t *kbd; void (*kernel)(bd_t *, ulong, ulong, ulong, ulong); @@ -84,25 +79,6 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, ulong of_data = 0; #endif - if ((s = getenv ("initrd_high")) != NULL) { - /* a value of "no" or a similar string will act like 0, - * turning the "load high" feature off. This is intentional. - */ - initrd_high = simple_strtoul(s, NULL, 16); - if (initrd_high == ~0) - initrd_copy_to_ram = 0; - } else { /* not set, no restrictions to load high */ - initrd_high = ~0; - } - -#ifdef CONFIG_LOGBUFFER - kbd=gd->bd; - /* Prevent initrd from overwriting logbuffer */ - if (initrd_high < (kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD)) - initrd_high = kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD; - debug ("## Logbuffer at 0x%08lX ", kbd->bi_memsize-LOGBUFF_LEN); -#endif - /* * Booting a (Linux) kernel image * @@ -113,18 +89,17 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, * pointer. */ - asm( "mr %0,1": "=r"(sp) : ); - - debug ("## Current stack ends at 0x%08lX ", sp); + sp_limit = get_sp(); + debug ("## Current stack ends at 0x%08lX ", sp_limit); - sp -= 2048; /* just to be sure */ - if (sp > CFG_BOOTMAPSZ) - sp = CFG_BOOTMAPSZ; - sp &= ~0xF; + sp_limit -= 2048; /* just to be sure */ + if (sp_limit > CFG_BOOTMAPSZ) + sp_limit = CFG_BOOTMAPSZ; + sp_limit &= ~0xF; - debug ("=> set upper limit to 0x%08lX\n", sp); + debug ("=> set upper limit to 0x%08lX\n", sp_limit); - cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF); + cmdline = (char *)((sp_limit - CFG_BARGSIZE) & ~0xF); kbd = (bd_t *)(((ulong)cmdline - sizeof(bd_t)) & ~0xF); if ((s = getenv("bootargs")) == NULL) @@ -168,13 +143,20 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, #endif /* CONFIG_MPC5xxx */ } + /* find kernel */ kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr); + /* find ramdisk */ get_ramdisk (cmdtp, flag, argc, argv, hdr, verify, IH_ARCH_PPC, &rd_data_start, &rd_data_end); + rd_len = rd_data_end - rd_data_start; + ramdisk_high (rd_data_start, rd_len, kbd, sp_limit, get_sp (), + &initrd_start, &initrd_end); + #if defined(CONFIG_OF_LIBFDT) + /* find flattened device tree */ if(argc > 3) { of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16); fdt_hdr = (image_header_t *)of_flat_tree; @@ -265,56 +247,6 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, } #endif - if (rd_data_start) { - if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */ - initrd_start = rd_data_start; - initrd_end = rd_data_end; - } else { - initrd_start = (ulong)kbd - rd_len; - initrd_start &= ~(4096 - 1); /* align on page */ - - if (initrd_high) { - ulong nsp; - - /* - * the inital ramdisk does not need to be within - * CFG_BOOTMAPSZ as it is not accessed until after - * the mm system is initialised. - * - * do the stack bottom calculation again and see if - * the initrd will fit just below the monitor stack - * bottom without overwriting the area allocated - * above for command line args and board info. - */ - asm( "mr %0,1": "=r"(nsp) : ); - nsp -= 2048; /* just to be sure */ - nsp &= ~0xF; - if (nsp > initrd_high) /* limit as specified */ - nsp = initrd_high; - nsp -= rd_len; - nsp &= ~(4096 - 1); /* align on page */ - if (nsp >= sp) - initrd_start = nsp; - } - - show_boot_progress (12); - - debug ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n", - rd_data_start, rd_data_end - 1, rd_len, rd_len); - - initrd_end = initrd_start + rd_len; - printf (" Loading Ramdisk to %08lx, end %08lx ... ", - initrd_start, initrd_end); - - memmove_wd((void *)initrd_start, - (void *)rd_data_start, rd_len, CHUNKSZ); - - puts ("OK\n"); - } - } else { - initrd_start = 0; - initrd_end = 0; - } #if defined(CONFIG_OF_LIBFDT) @@ -413,6 +345,14 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, /* does not return */ } +static ulong get_sp (void) +{ + ulong sp; + + asm( "mr %0,1": "=r"(sp) : ); + return sp; +} + #if defined(CONFIG_OF_LIBFDT) static void fdt_error (const char *msg) { |