diff options
| author | David Miller <davem@davemloft.net> | 2012-10-08 19:34:23 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 03:23:05 -0400 |
| commit | dbc9fdf063dc4f12af71d7858bd216170129822e (patch) | |
| tree | 3950c72a8820f630fdd6d4ced3412de913391346 /arch/sparc/include/asm/tsb.h | |
| parent | c460bec78d9257a54bcc5f9d5fadf89f8c70dbd1 (diff) | |
sparc64: Document PGD and PMD layout.
We're going to be messing around with the PMD interpretation and layout
for the sake of transparent huge pages, so we better clearly document what
we're starting with.
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sparc/include/asm/tsb.h')
| -rw-r--r-- | arch/sparc/include/asm/tsb.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/sparc/include/asm/tsb.h b/arch/sparc/include/asm/tsb.h index 6435924b4514..ef8cd1a174f1 100644 --- a/arch/sparc/include/asm/tsb.h +++ b/arch/sparc/include/asm/tsb.h | |||
| @@ -147,13 +147,13 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; | |||
| 147 | brz,pn REG1, FAIL_LABEL; \ | 147 | brz,pn REG1, FAIL_LABEL; \ |
| 148 | sllx VADDR, 64 - (PMD_SHIFT + PMD_BITS), REG2; \ | 148 | sllx VADDR, 64 - (PMD_SHIFT + PMD_BITS), REG2; \ |
| 149 | srlx REG2, 64 - PAGE_SHIFT, REG2; \ | 149 | srlx REG2, 64 - PAGE_SHIFT, REG2; \ |
| 150 | sllx REG1, 11, REG1; \ | 150 | sllx REG1, PGD_PADDR_SHIFT, REG1; \ |
| 151 | andn REG2, 0x3, REG2; \ | 151 | andn REG2, 0x3, REG2; \ |
| 152 | lduwa [REG1 + REG2] ASI_PHYS_USE_EC, REG1; \ | 152 | lduwa [REG1 + REG2] ASI_PHYS_USE_EC, REG1; \ |
| 153 | brz,pn REG1, FAIL_LABEL; \ | 153 | brz,pn REG1, FAIL_LABEL; \ |
| 154 | sllx VADDR, 64 - PMD_SHIFT, REG2; \ | 154 | sllx VADDR, 64 - PMD_SHIFT, REG2; \ |
| 155 | srlx REG2, 64 - (PAGE_SHIFT - 1), REG2; \ | 155 | srlx REG2, 64 - (PAGE_SHIFT - 1), REG2; \ |
| 156 | sllx REG1, 11, REG1; \ | 156 | sllx REG1, PMD_PADDR_SHIFT, REG1; \ |
| 157 | andn REG2, 0x7, REG2; \ | 157 | andn REG2, 0x7, REG2; \ |
| 158 | add REG1, REG2, REG1; | 158 | add REG1, REG2, REG1; |
| 159 | 159 | ||
| @@ -172,13 +172,13 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; | |||
| 172 | brz,pn REG1, FAIL_LABEL; \ | 172 | brz,pn REG1, FAIL_LABEL; \ |
| 173 | sllx VADDR, 64 - (PMD_SHIFT + PMD_BITS), REG2; \ | 173 | sllx VADDR, 64 - (PMD_SHIFT + PMD_BITS), REG2; \ |
| 174 | srlx REG2, 64 - PAGE_SHIFT, REG2; \ | 174 | srlx REG2, 64 - PAGE_SHIFT, REG2; \ |
| 175 | sllx REG1, 11, REG1; \ | 175 | sllx REG1, PGD_PADDR_SHIFT, REG1; \ |
| 176 | andn REG2, 0x3, REG2; \ | 176 | andn REG2, 0x3, REG2; \ |
| 177 | lduwa [REG1 + REG2] ASI_PHYS_USE_EC, REG1; \ | 177 | lduwa [REG1 + REG2] ASI_PHYS_USE_EC, REG1; \ |
| 178 | brz,pn REG1, FAIL_LABEL; \ | 178 | brz,pn REG1, FAIL_LABEL; \ |
| 179 | sllx VADDR, 64 - PMD_SHIFT, REG2; \ | 179 | sllx VADDR, 64 - PMD_SHIFT, REG2; \ |
| 180 | srlx REG2, 64 - (PAGE_SHIFT - 1), REG2; \ | 180 | srlx REG2, 64 - (PAGE_SHIFT - 1), REG2; \ |
| 181 | sllx REG1, 11, REG1; \ | 181 | sllx REG1, PMD_PADDR_SHIFT, REG1; \ |
| 182 | andn REG2, 0x7, REG2; \ | 182 | andn REG2, 0x7, REG2; \ |
| 183 | add REG1, REG2, REG1; | 183 | add REG1, REG2, REG1; |
| 184 | 184 | ||