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Subject[rfc 10/45] cpu_alloc: Sparc64 support
Enable a simple virtual configuration with 32MB available per cpu so that
we do not use a static area on sparc64.

[Not tested. I have no sparc64]

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
arch/sparc64/Kconfig | 15 +++++++++++++++
arch/sparc64/kernel/vmlinux.lds.S | 3 +++
include/asm-sparc64/pgtable.h | 1 +
3 files changed, 19 insertions(+)

Index: linux-2.6/arch/sparc64/Kconfig
===================================================================
--- linux-2.6.orig/arch/sparc64/Kconfig 2007-11-18 14:38:24.601033354 -0800
+++ linux-2.6/arch/sparc64/Kconfig 2007-11-18 21:14:11.476343425 -0800
@@ -103,6 +103,21 @@ config SPARC64_PAGE_SIZE_4MB

endchoice

+config CPU_AREA_VIRTUAL
+ bool
+ default y
+
+config CPU_AREA_ORDER
+ int
+ default "11" if SPARC64_PAGE_SIZE_8KB
+ default "9" if SPARC64_PAGE_SIZE_64KB
+ default "6" if SPARC64_PAGE_SIZE_512KB
+ default "3" if SPARC64_PAGE_SIZE_4MB
+
+config CPU_AREA_ALLOC_ORDER
+ int
+ default "0"
+
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
Index: linux-2.6/include/asm-sparc64/pgtable.h
===================================================================
--- linux-2.6.orig/include/asm-sparc64/pgtable.h 2007-11-18 14:38:24.609034022 -0800
+++ linux-2.6/include/asm-sparc64/pgtable.h 2007-11-18 21:14:11.504343895 -0800
@@ -43,6 +43,7 @@
#define VMALLOC_START _AC(0x0000000100000000,UL)
#define VMALLOC_END _AC(0x0000000200000000,UL)
#define VMEMMAP_BASE _AC(0x0000000200000000,UL)
+#define CPU_AREA_BASE _AC(0x0000000300000000,UL)

#define vmemmap ((struct page *)VMEMMAP_BASE)

Index: linux-2.6/arch/sparc64/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6.orig/arch/sparc64/kernel/vmlinux.lds.S 2007-11-18 21:14:31.068844088 -0800
+++ linux-2.6/arch/sparc64/kernel/vmlinux.lds.S 2007-11-18 21:14:50.469421513 -0800
@@ -2,12 +2,15 @@

#include <asm/page.h>
#include <asm-generic/vmlinux.lds.h>
+#include <asm/pgtable.h>

OUTPUT_FORMAT("elf64-sparc", "elf64-sparc", "elf64-sparc")
OUTPUT_ARCH(sparc:v9a)
ENTRY(_start)

jiffies = jiffies_64;
+cpu_area = CPU_AREA_BASE
+
SECTIONS
{
swapper_low_pmd_dir = 0x0000000000402000;
--
-
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