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| 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 /arch/powerpc/kernel/prom.c | |
| parent | 8c4f1f2958ff9d4a6760f3bdd0cfb7d2b9e12093 (diff) | |
| download | blackbird-obmc-linux-0cc4746cadda16826a1b3214c042a2f75445b71c.tar.gz blackbird-obmc-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 'arch/powerpc/kernel/prom.c')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 3bf968e74095..9aac77ca3167 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -37,6 +37,7 @@ #include <asm/processor.h> #include <asm/irq.h> #include <asm/io.h> +#include <asm/kdump.h> #include <asm/smp.h> #include <asm/system.h> #include <asm/mmu.h> @@ -1335,11 +1336,14 @@ void __init early_init_devtree(void *params) of_scan_flat_dt(early_init_dt_scan_memory, NULL); lmb_enforce_memory_limit(memory_limit); lmb_analyze(); - lmb_reserve(0, __pa(klimit)); DBG("Phys. mem: %lx\n", lmb_phys_mem_size()); /* Reserve LMB regions used by kernel, initrd, dt, etc... */ + lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); +#ifdef CONFIG_CRASH_DUMP + lmb_reserve(0, KDUMP_RESERVE_LIMIT); +#endif early_reserve_mem(); DBG("Scanning CPUs ...\n"); |
