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authorHelge Deller <deller@parisc-linux.org>2006-04-20 20:40:23 +0000
committerKyle McMartin <kyle@hera.kernel.org>2006-04-21 22:20:34 +0000
commit2fd83038160531245099c3c5b3511fa4b80765eb (patch)
tree6145a9e78723c76ceac722eb60267c0116983c12 /arch/parisc/kernel/head.S
parentd668da80d613def981c573354e1853e38bd0698d (diff)
[PARISC] Further work for multiple page sizes
More work towards supporing multiple page sizes on 64-bit. Convert some assumptions that 64bit uses 3 level page tables into testing PT_NLEVELS. Also some BUG() to BUG_ON() conversions and some cleanups to assembler. Signed-off-by: Helge Deller <deller@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'arch/parisc/kernel/head.S')
-rw-r--r--arch/parisc/kernel/head.S15
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S
index 0b47afc2069..3e79e62f7b0 100644
--- a/arch/parisc/kernel/head.S
+++ b/arch/parisc/kernel/head.S
@@ -76,16 +76,16 @@ $bss_loop:
mtctl %r4,%cr24 /* Initialize kernel root pointer */
mtctl %r4,%cr25 /* Initialize user root pointer */
-#ifdef CONFIG_64BIT
+#if PT_NLEVELS == 3
/* Set pmd in pgd */
load32 PA(pmd0),%r5
shrd %r5,PxD_VALUE_SHIFT,%r3
- ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
+ ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
stw %r3,ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4)
ldo ASM_PMD_ENTRY*ASM_PMD_ENTRY_SIZE(%r5),%r4
#else
/* 2-level page table, so pmd == pgd */
- ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4
+ ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4
#endif
/* Fill in pmd with enough pte directories */
@@ -99,7 +99,7 @@ $bss_loop:
stw %r3,0(%r4)
ldo (ASM_PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3
addib,> -1,%r1,1b
-#ifdef CONFIG_64BIT
+#if PT_NLEVELS == 3
ldo ASM_PMD_ENTRY_SIZE(%r4),%r4
#else
ldo ASM_PGD_ENTRY_SIZE(%r4),%r4
@@ -107,13 +107,14 @@ $bss_loop:
/* Now initialize the PTEs themselves */
- ldo _PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */
+ ldo 0+_PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */
+ ldi (1<<(KERNEL_INITIAL_ORDER-PAGE_SHIFT)),%r11 /* PFN count */
load32 PA(pg0),%r1
$pgt_fill_loop:
STREGM %r3,ASM_PTE_ENTRY_SIZE(%r1)
- ldo ASM_PAGE_SIZE(%r3),%r3
- bb,>= %r3,31-KERNEL_INITIAL_ORDER,$pgt_fill_loop
+ ldo (1<<PFN_PTE_SHIFT)(%r3),%r3 /* add one PFN */
+ addib,> -1,%r11,$pgt_fill_loop
nop
/* Load the return address...er...crash 'n burn */