diff options
| author | Kumar Gala | 2008-02-27 21:51:50 -0600 |
|---|---|---|
| committer | Marian Balakowicz | 2008-02-29 13:15:56 +0100 |
| commit | d3f2fa0d278467b2232e4eb2372f905c3febfbeb (patch) | |
| tree | 354a389881ddaacfc29a0b02c6fb12b9cb7c1f81 /lib_ppc/bootm.c | |
| parent | e822d7fc4dd4755d4d0a22f05e33f33d1a0481da (diff) | |
[new uImage] Provide ability to restrict region used for boot images
Allow the user to set 'bootm_low' and 'bootm_size' env vars as a way
to restrict what memory range is used for bootm.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Marian Balakowicz <m8@semihalf.com>
Diffstat (limited to 'lib_ppc/bootm.c')
| -rw-r--r-- | lib_ppc/bootm.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c index d74a3f46f6d..59cc2a44718 100644 --- a/lib_ppc/bootm.c +++ b/lib_ppc/bootm.c @@ -59,6 +59,10 @@ extern ulong get_effective_memsize(void); static ulong get_sp (void); static void set_clocks_in_mhz (bd_t *kbd); +#ifndef CFG_LINUX_LOWMEM_MAX_SIZE +#define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024) +#endif + void __attribute__((noinline)) do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], bootm_headers_t *images) @@ -67,6 +71,7 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], ulong initrd_start, initrd_end; ulong rd_data_start, rd_data_end, rd_len; + ulong size; ulong cmd_start, cmd_end, bootmap_base; bd_t *kbd; @@ -80,7 +85,24 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], char *of_flat_tree = NULL; #endif - bootmap_base = 0; + bootmap_base = getenv_bootm_low(); + size = getenv_bootm_size(); + +#ifdef DEBUG + if (((u64)bootmap_base + size) > (CFG_SDRAM_BASE + (u64)gd->ram_size)) + puts("WARNING: bootm_low + bootm_size exceed total memory\n"); + if ((bootmap_base + size) > get_effective_memsize()) + puts("WARNING: bootm_low + bootm_size exceed eff. memory\n"); +#endif + + size = min(size, get_effective_memsize()); + size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE); + + if (size < getenv_bootm_size()) { + ulong base = bootmap_base + size; + printf("WARNING: adjusting available memory to %x\n", size); + lmb_reserve(lmb, base, getenv_bootm_size() - size); + } /* * Booting a (Linux) kernel image @@ -92,7 +114,7 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], * pointer. */ sp = get_sp(); - debug ("## Current stack ends at 0x%08lx ", sp); + debug ("## Current stack ends at 0x%08lx\n", sp); /* adjust sp by 1K to be safe */ sp -= 1024; |