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 <ga...@kernel.crashing.org>
Acked-by: Becky Bruce <bec...@kernel.crashing.org>
---
* No real change, just here for completeness
lib_ppc/board.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/lib_ppc/board.c b/lib_ppc/board.c
index 3b93e4e..6eeca02 100644
--- a/lib_ppc/board.c
+++ b/lib_ppc/board.c
@@ -79,6 +79,10 @@
#include <asm/mmu.h>
#endif
+#ifdef CONFIG_MP
+extern u32 determine_mp_bootpg(void);
+#endif
+
#ifdef CONFIG_SYS_UPDATE_FLASH_SIZE
extern int update_flash_size (int flash_size);
#endif
@@ -444,6 +448,15 @@ 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 */
--
1.5.6.6
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