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authorMichael Ellerman <michael@ellerman.id.au>2005-12-04 08:39:37 +0100
committerPaul Mackerras <paulus@samba.org>2006-01-09 04:52:21 +0100
commit0cc4746cadda16826a1b3214c042a2f75445b71c (patch)
treeec8decc81a3f9fd09454ff208fd3b82cf5bdb730 /arch/powerpc/kernel/prom.c
parent[PATCH] powerpc: Create a trampoline for the fwnmi vectors (diff)
downloadlinux-0cc4746cadda16826a1b3214c042a2f75445b71c.tar.xz
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.c6
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");