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ppc: Allow boards to specify how much memory they can map

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For historical reasons we limited the stack to 256M because some boards
could only map that much via BATS.  However newer boards are capable of
mapping more memory (for example 85xx is capble of doing up to 2G).

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2008-02-15 15:16:18 -06:00 • committed by Wolfgang Denk
parent a6f5f317cd
commit 9c666a7db0
1 changed files with 11 additions and 0 deletions

11
lib_ppc/board.c
View file

@ -433,7 +433,18 @@ void board_init_f (ulong bootflag)
*/
len = (ulong)&_end - CFG_MONITOR_BASE;
#ifndef CONFIG_MAX_MEM_MAPPED
#define CONFIG_MAX_MEM_MAPPED (256 << 20)
#endif
#ifndef CONFIG_VERY_BIG_RAM
addr = CFG_SDRAM_BASE + get_effective_memsize();
#else
/* only allow stack below 256M */
addr = CFG_SDRAM_BASE +
(gd->ram_size > CONFIG_MAX_MEM_MAPPED) ?
CONFIG_MAX_MEM_MAPPED : get_effective_memsize();
#endif
#ifdef CONFIG_LOGBUFFER
#ifndef CONFIG_ALT_LB_ADDR