diff options
| -rw-r--r-- | include/lmb.h | 1 | ||||
| -rw-r--r-- | lib/lmb.c | 35 |
2 files changed, 36 insertions, 0 deletions
diff --git a/include/lmb.h b/include/lmb.h index 3c4afdf9f0..1984291132 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -122,6 +122,7 @@ lmb_size_bytes(struct lmb_region *type, unsigned long region_nr) void board_lmb_reserve(struct lmb *lmb); void arch_lmb_reserve(struct lmb *lmb); +void arch_lmb_reserve_generic(struct lmb *lmb, ulong sp, ulong end, ulong align); /* Low level functions */ @@ -12,6 +12,10 @@ #include <log.h> #include <malloc.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + #define LMB_ALLOC_ANYWHERE 0 static void lmb_dump_region(struct lmb_region *rgn, char *name) @@ -113,6 +117,37 @@ void lmb_init(struct lmb *lmb) lmb->reserved.cnt = 0; } +void arch_lmb_reserve_generic(struct lmb *lmb, ulong sp, ulong end, ulong align) +{ + ulong bank_end; + int bank; + + /* + * Reserve memory from aligned address below the bottom of U-Boot stack + * until end of U-Boot area using LMB to prevent U-Boot from overwriting + * that memory. + */ + debug("## Current stack ends at 0x%08lx ", sp); + + /* adjust sp by 4K to be safe */ + sp -= align; + for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { + if (!gd->bd->bi_dram[bank].size || + sp < gd->bd->bi_dram[bank].start) + continue; + /* Watch out for RAM at end of address space! */ + bank_end = gd->bd->bi_dram[bank].start + + gd->bd->bi_dram[bank].size - 1; + if (sp > bank_end) + continue; + if (bank_end > end) + bank_end = end - 1; + + lmb_reserve(lmb, sp, bank_end - sp + 1); + break; + } +} + static void lmb_reserve_common(struct lmb *lmb, void *fdt_blob) { arch_lmb_reserve(lmb); |