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MPC512x: Change traps.c to not reference non-addressable memory

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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>
This commit is contained in:
Becky Bruce 2008-05-14 13:09:51 -05:00 committed by Wolfgang Denk
parent 81673e9ae1
commit 9b124a6834
1 changed files with 7 additions and 1 deletions
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8
cpu/mpc512x/traps.c
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@ -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