sysmo-bts
/
u-boot
9
0
Fork 0
Code Pull Requests Releases Activity

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>
This commit is contained in:
Becky Bruce 2008-05-14 13:09:58 -05:00 committed by Jon Loeliger
parent 1a247ba7fa
commit 279726bd00
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
cpu/mpc86xx/traps.c
View File

@ -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