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authorMichael Ellerman <michael@ellerman.id.au>2005-12-04 18:39:37 +1100
committerPaul Mackerras <paulus@samba.org>2006-01-09 14:52:21 +1100
commit0cc4746cadda16826a1b3214c042a2f75445b71c (patch)
treeec8decc81a3f9fd09454ff208fd3b82cf5bdb730 /include/asm-powerpc
parent8c4f1f2958ff9d4a6760f3bdd0cfb7d2b9e12093 (diff)
[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')
-rw-r--r--include/asm-powerpc/kdump.h13
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 00000000000..a87aed00d61
--- /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 */