diff options
Diffstat (limited to 'arch/m32r/mm/mmu.S')
| -rw-r--r-- | arch/m32r/mm/mmu.S | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/arch/m32r/mm/mmu.S b/arch/m32r/mm/mmu.S index 0c28f11d667..e9491a5ae82 100644 --- a/arch/m32r/mm/mmu.S +++ b/arch/m32r/mm/mmu.S @@ -4,9 +4,6 @@ * Copyright (C) 2001 by Hiroyuki Kondo */ -/* $Id: mmu.S,v 1.15 2004/03/16 02:56:27 takata Exp $ */ - -#include <linux/config.h> /* CONFIG_MMU */ #include <linux/linkage.h> #include <asm/assembler.h> #include <asm/smp.h> @@ -153,9 +150,13 @@ ENTRY(tme_handler) ; pmd = pmd_offset(pgd, address); ld r3, @r3 ; r3: pmd data - ldi r2, #-4096 beqz r3, 3f ; pmd_none(*pmd) ? + and3 r2, r3, #0xfff + add3 r2, r2, #-355 ; _KERNPG_TABLE(=0x163) + bnez r2, 3f ; pmd_bad(*pmd) ? + ldi r2, #-4096 + ; pte = pte_offset(pmd, address); and r2, r3 ; r2: pte base addr srl3 r3, r0, #10 @@ -166,7 +167,8 @@ ENTRY(tme_handler) ; pte_data = (unsigned long)pte_val(*pte); ld r2, @r3 ; r2: pte data - or3 r2, r2, #2 ; _PAGE_PRESENT(=2) + and3 r3, r2, #2 ; _PAGE_PRESENT(=2) check + beqz r3, 3f .fillinsn 5: @@ -265,13 +267,10 @@ ENTRY(tme_handler) ld r1, @r3 ; r1: pmd beqz r1, 3f ; pmd_none(*pmd) ? ; - and3 r1, r1, #0xeff - ldi r4, #611 ; _KERNPG_TABLE(=611) - beq r1, r4, 4f ; !pmd_bad(*pmd) ? - .fillinsn -3: - ldi r1, #0 ; r1: pte_data = 0 - bra 5f + and3 r1, r1, #0x3ff + ldi r4, #0x163 ; _KERNPG_TABLE(=0x163) + bne r1, r4, 3f ; pmd_bad(*pmd) ? + .fillinsn 4: ; pte = pte_offset(pmd, address); @@ -285,8 +284,10 @@ ENTRY(tme_handler) add r4, r3 ; r4: pte ; pte_data = (unsigned long)pte_val(*pte); ld r1, @r4 ; r1: pte_data - .fillinsn + and3 r3, r1, #2 ; _PAGE_PRESENT(=2) check + beqz r3, 3f + .fillinsn ;; set tlb ; r0: address, r1: pte_data, r2: entry ; r3,r4: (free) @@ -298,8 +299,7 @@ ENTRY(tme_handler) and3 r4, r4, #(MMU_CONTEXT_ASID_MASK) or r3, r4 st r3, @r2 - or3 r4, r1, #2 ; _PAGE_PRESENT(=2) - st r4, @(4,r2) ; set_tlb_data(entry, pte_data); + st r1, @(4,r2) ; set_tlb_data(entry, pte_data); ld r4, @sp+ ld r3, @sp+ @@ -309,6 +309,11 @@ ENTRY(tme_handler) ld sp, @sp+ rte + .fillinsn +3: + ldi r1, #2 ; r1: pte_data = 0 | _PAGE_PRESENT(=2) + bra 5b + #else #error unknown isa configuration #endif @@ -346,5 +351,4 @@ ENTRY(m32r_otlb_entrys) #endif /* CONFIG_MMU */ -.end - + .end |