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authorGuenter Roeck <guenter.roeck@ericsson.com>2010-02-02 17:52:20 +0100
committerRalf Baechle <ralf@linux-mips.org>2010-02-02 19:56:23 +0100
commit91dfc423cc8cfd399fb308a837102a7ab7fa067e (patch)
tree21c75672185153084a5ac8e38ca3938ca0cf4ac1 /arch/mips/include/asm/pgtable-64.h
parentMIPS: AR7: Fix USB slave mem range typo (diff)
downloadlinux-91dfc423cc8cfd399fb308a837102a7ab7fa067e.tar.xz
linux-91dfc423cc8cfd399fb308a837102a7ab7fa067e.zip
MIPS: 64-bit: Detect virtual memory size
Linux kernel 2.6.32 and later allocate address space from the top of the kernel virtual memory address space. This patch implements virtual memory size detection for 64 bit MIPS CPUs to avoid resulting crashes. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/935/ Reviewed-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/pgtable-64.h')
-rw-r--r--arch/mips/include/asm/pgtable-64.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index 9cd508993956..8eda30b467da 100644
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -110,7 +110,9 @@
#define VMALLOC_START MAP_BASE
#define VMALLOC_END \
(VMALLOC_START + \
- PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE - (1UL << 32))
+ min(PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \
+ (1UL << cpu_vmbits)) - (1UL << 32))
+
#if defined(CONFIG_MODULES) && defined(KBUILD_64BIT_SYM32) && \
VMALLOC_START != CKSSEG
/* Load modules into 32bit-compatible segment. */