m32r: fix tme_handler
Hirokazu Takata [Tue, 11 Aug 2009 14:12:41 +0000 (23:12 +0900)]
Fix pmd_bad check code of tme_handler (TLB Miss Exception handler).
The correct _KERNPG_TABLE value is not 0x263(=611) but 0x163.

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

arch/m32r/mm/mmu.S

index 49a6d16..e9491a5 100644 (file)
@@ -150,9 +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
@@ -263,9 +267,9 @@ ENTRY(tme_handler)
        ld      r1, @r3                 ; r1: pmd
        beqz    r1, 3f                  ; pmd_none(*pmd) ?
 ;
-       and3    r1, r1, #0xeff
-       ldi     r4, #611                ; _KERNPG_TABLE(=611)
-       bne     r1, r4, 3f              ; !pmd_bad(*pmd) ?
+       and3    r1, r1, #0x3ff
+       ldi     r4, #0x163              ; _KERNPG_TABLE(=0x163)
+       bne     r1, r4, 3f              ; pmd_bad(*pmd) ?
 
        .fillinsn
 4: