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[PATCH] ppc64 boot: print firmware provided stackpointer

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Show firmware provided stackpointer during boot.

This helps to find the "taboo" areas on the various boards.  claim tends to
fail for these memory areas, but some jokers return success anyway.

Use %p to print the load address, its a pointer.

Signed-off-by: Olaf Hering <olh@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Olaf Hering 2005-10-28 17:46:50 -07:00 committed by Paul Mackerras
parent 67a1b68263
commit 7e658118fa
2 changed files with 3 additions and 2 deletions
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1
arch/ppc64/boot/crt0.S
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@ -54,5 +54,6 @@ clear_caches:
sync
isync
mr r6,r1
b start

4
arch/ppc64/boot/main.c
View File

@ -131,7 +131,7 @@ static unsigned long try_claim(unsigned long size)
return addr;
}
void start(unsigned long a1, unsigned long a2, void *promptr)
void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
{
unsigned long i;
int len;
@ -151,7 +151,7 @@ void start(unsigned long a1, unsigned long a2, void *promptr)
if (getprop(chosen_handle, "stdin", &stdin, sizeof(stdin)) != 4)
exit();
printf("\n\rzImage starting: loaded at 0x%lx\n\r", (unsigned long) _start);
printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r", _start, sp);
/*
* The first available claim_base must be above the end of the