diff options
| author | David Gibson <david@gibson.dropbear.id.au> | 2005-08-05 19:39:06 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-08-29 10:53:31 +1000 |
| commit | e28f7faf05159f1cfd564596f5e6178edba6bd49 (patch) | |
| tree | 45534d2c33bff8b64e3fd155fba55146cb7518e6 /include/asm-ppc64/processor.h | |
| parent | decd300b30e499fe6be1bbfc5650fc971de8c1fa (diff) | |
| download | op-kernel-dev-e28f7faf05159f1cfd564596f5e6178edba6bd49.zip op-kernel-dev-e28f7faf05159f1cfd564596f5e6178edba6bd49.tar.gz | |
[PATCH] Four level pagetables for ppc64
Implement 4-level pagetables for ppc64
This patch implements full four-level page tables for ppc64, thereby
extending the usable user address range to 44 bits (16T).
The patch uses a full page for the tables at the bottom and top level,
and a quarter page for the intermediate levels. It uses full 64-bit
pointers at every level, thus also increasing the addressable range of
physical memory. This patch also tweaks the VSID allocation to allow
matching range for user addresses (this halves the number of available
contexts) and adds some #if and BUILD_BUG sanity checks.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc64/processor.h')
| -rw-r--r-- | include/asm-ppc64/processor.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-ppc64/processor.h b/include/asm-ppc64/processor.h index 352306c..50b14c0 100644 --- a/include/asm-ppc64/processor.h +++ b/include/asm-ppc64/processor.h @@ -382,8 +382,8 @@ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); extern struct task_struct *last_task_used_math; extern struct task_struct *last_task_used_altivec; -/* 64-bit user address space is 41-bits (2TBs user VM) */ -#define TASK_SIZE_USER64 (0x0000020000000000UL) +/* 64-bit user address space is 44-bits (16TB user VM) */ +#define TASK_SIZE_USER64 (0x0000100000000000UL) /* * 32-bit user address space is 4GB - 1 page |
