diff options
| author | Michael Ellerman <michael@ellerman.id.au> | 2005-12-04 18:39:37 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-01-09 14:52:21 +1100 |
| commit | 0cc4746cadda16826a1b3214c042a2f75445b71c (patch) | |
| tree | ec8decc81a3f9fd09454ff208fd3b82cf5bdb730 /include/asm-powerpc/kdump.h | |
| parent | 8c4f1f2958ff9d4a6760f3bdd0cfb7d2b9e12093 (diff) | |
| download | blackbird-op-linux-0cc4746cadda16826a1b3214c042a2f75445b71c.tar.gz blackbird-op-linux-0cc4746cadda16826a1b3214c042a2f75445b71c.zip | |
[PATCH] powerpc: Reroute interrupts from 0 + offset to PHYSICAL_START + offset
Regardless of where the kernel's linked we always get interrupts at low
addresses. This patch creates a trampoline in the first 3 pages of memory,
where interrupts land, and patches those addresses to jump into the real
kernel code at PHYSICAL_START.
We also need to reserve the trampoline code and a bit more in prom.c
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/kdump.h')
| -rw-r--r-- | include/asm-powerpc/kdump.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-powerpc/kdump.h b/include/asm-powerpc/kdump.h new file mode 100644 index 000000000000..a87aed00d61f --- /dev/null +++ b/include/asm-powerpc/kdump.h @@ -0,0 +1,13 @@ +#ifndef _PPC64_KDUMP_H +#define _PPC64_KDUMP_H + +/* How many bytes to reserve at zero for kdump. The reserve limit should + * be greater or equal to the trampoline's end address. */ +#define KDUMP_RESERVE_LIMIT 0x8000 + +#define KDUMP_TRAMPOLINE_START 0x0100 +#define KDUMP_TRAMPOLINE_END 0x3000 + +extern void kdump_setup(void); + +#endif /* __PPC64_KDUMP_H */ |
