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85xx/86xx: Ensure MP boot page is not used

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We had a bug on 86xx in which the boot page used to bring up secondary
cores was being overwritten and used for the malloc region in u-boot.

We need to reserve the region of memory that the boot page is going to
be put at so nothing uses it.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2009-03-31 17:58:13 -05:00
parent c840d26c75
commit fc39c2fd51
1 changed files with 15 additions and 0 deletions
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15
lib_ppc/board.c
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@ -79,6 +79,10 @@
#include <asm/mmu.h>
#endif
#ifdef CONFIG_MP
#include <asm/mp.h>
#endif
#ifdef CONFIG_SYS_UPDATE_FLASH_SIZE
extern int update_flash_size (int flash_size);
#endif
@ -444,6 +448,17 @@ void board_init_f (ulong bootflag)
addr = CONFIG_SYS_SDRAM_BASE + get_effective_memsize();
#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
/*
* We need to make sure the location we intend to put secondary core
* boot code is reserved and not used by any part of u-boot
*/
if (addr > determine_mp_bootpg()) {
addr = determine_mp_bootpg();
debug ("Reserving MP boot page to %08lx\n", addr);
}
#endif
#ifdef CONFIG_LOGBUFFER
#ifndef CONFIG_ALT_LB_ADDR
/* reserve kernel log buffer */