From 81d93e5c4b83d8b6dcee69de6f4a14ccf6f7114a Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Mon, 18 Feb 2008 08:09:37 -0600 Subject: [PATCH] ppc: Allow boards to specify effective amount of memory 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 capable of doing up to 2G). Signed-off-by: Kumar Gala --- lib_ppc/board.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/lib_ppc/board.c b/lib_ppc/board.c index 45d1328f21..fbf1c5d25a 100644 --- a/lib_ppc/board.c +++ b/lib_ppc/board.c @@ -361,6 +361,20 @@ init_fnc_t *init_sequence[] = { NULL, /* Terminate this list */ }; +#ifndef CONFIG_MAX_MEM_MAPPED +#define CONFIG_MAX_MEM_MAPPED (256 << 20) +#endif +ulong get_effective_memsize(void) +{ +#ifndef CONFIG_VERY_BIG_RAM + return gd->ram_size; +#else + /* limit stack to what we can reasonable map */ + return ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ? + CONFIG_MAX_MEM_MAPPED : gd->ram_size); +#endif +} + /************************************************************************ * * This is the first part of the initialization sequence that is @@ -419,13 +433,7 @@ void board_init_f (ulong bootflag) */ len = (ulong)&_end - CFG_MONITOR_BASE; -#ifndef CONFIG_VERY_BIG_RAM - addr = CFG_SDRAM_BASE + gd->ram_size; -#else - /* only allow stack below 256M */ - addr = CFG_SDRAM_BASE + - (gd->ram_size > 256 << 20) ? 256 << 20 : gd->ram_size; -#endif + addr = CFG_SDRAM_BASE + get_effective_memsize(); #ifdef CONFIG_LOGBUFFER /* reserve kernel log buffer */ -- 2.39.5