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| author | Becky Bruce <becky.bruce@freescale.com> | 2008-05-14 13:09:58 -0500 |
|---|---|---|
| committer | Jon Loeliger <jdl@freescale.com> | 2008-06-06 10:55:35 -0500 |
| commit | 279726bd00558e80263d44581c44167625b7fb9a (patch) | |
| tree | ce58980690892c79147b8d38aef7edfb636bdbb4 /cpu/mpc86xx/traps.c | |
| parent | 1a247ba7fa5fb09f56892a09a990f03ce564b3e2 (diff) | |
| download | u-boot-imx-279726bd00558e80263d44581c44167625b7fb9a.zip u-boot-imx-279726bd00558e80263d44581c44167625b7fb9a.tar.gz u-boot-imx-279726bd00558e80263d44581c44167625b7fb9a.tar.bz2 | |
MPC86xx: 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 to prevent us from trying to access
non-mapped memory.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Diffstat (limited to 'cpu/mpc86xx/traps.c')
| -rw-r--r-- | cpu/mpc86xx/traps.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/cpu/mpc86xx/traps.c b/cpu/mpc86xx/traps.c index 04c2e13..5695c3e 100644 --- a/cpu/mpc86xx/traps.c +++ b/cpu/mpc86xx/traps.c @@ -43,7 +43,13 @@ int (*debugger_exception_handler)(struct pt_regs *) = 0; /* Returns 0 if exception not found and fixup otherwise. */ 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 |