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authorBecky Bruce <becky.bruce@freescale.com>2008-05-14 13:09:51 -0500
committerWolfgang Denk <wd@denx.de>2008-06-03 19:47:14 +0200
commit9b124a68346ce9605b6e1fcf79e1021541cdba9e (patch)
tree4b5a015b0dcf5b2ab17765498519bf8ea12355ab /cpu/mpc512x/traps.c
parent81673e9ae14b771cd13faf19947192599cae3959 (diff)
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MPC512x: Change traps.c to not reference non-addressable memory
Currently, END_OF_RAM is used by the trap code to determine if we should attempt to access the stack pointer or not. However, on systems with a lot of RAM, only a subset of the RAM is guaranteed to be mapped in and accessible. Change END_OF_RAM to use get_effective_memsize() instead of using the raw ram size out of the bd. Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Diffstat (limited to 'cpu/mpc512x/traps.c')
-rw-r--r--cpu/mpc512x/traps.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/cpu/mpc512x/traps.c b/cpu/mpc512x/traps.c
index 8455c92..8000fab 100644
--- a/cpu/mpc512x/traps.c
+++ b/cpu/mpc512x/traps.c
@@ -34,7 +34,13 @@ DECLARE_GLOBAL_DATA_PTR;
extern unsigned long search_exception_table(unsigned long);
-#define END_OF_MEM (gd->bd->bi_memstart + gd->bd->bi_memsize)
+/*
+ * End of addressable memory. This may be less than the actual
+ * amount of memory on the system if we're unable to keep all
+ * the memory mapped in.
+ */
+extern ulong get_effective_memsize(void);
+#define END_OF_MEM (gd->bd->bi_memstart + get_effective_memsize())
/*
* Trap & Exception support