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authorRalf Baechle <ralf@linux-mips.org>2010-03-23 17:56:38 +0100
committerRalf Baechle <ralf@linux-mips.org>2010-04-12 17:26:21 +0100
commit3d45285dd1ff4d4a1361b95e2d6508579a4402b5 (patch)
tree8130cd7c5289983de1e622728de07eb1588a326a /arch/mips/mm/tlbex.c
parent5e3644a95db11e2e582ae3765ffad6e0cce5376e (diff)
downloadlinux-2.6.38-lt-ux500-3d45285dd1ff4d4a1361b95e2d6508579a4402b5.tar.gz
MIPS: Sibyte: Fix M3 TLB exception handler workaround.
The M3 workaround needs to cmpare the region and VPN2 fields only. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/tlbex.c')
-rw-r--r--arch/mips/mm/tlbex.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 0de0e4127d6..d1f68aadbc4 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -788,10 +788,15 @@ static void __cpuinit build_r4000_tlb_refill_handler(void)
* create the plain linear handler
*/
if (bcm1250_m3_war()) {
- UASM_i_MFC0(&p, K0, C0_BADVADDR);
- UASM_i_MFC0(&p, K1, C0_ENTRYHI);
+ unsigned int segbits = 44;
+
+ uasm_i_dmfc0(&p, K0, C0_BADVADDR);
+ uasm_i_dmfc0(&p, K1, C0_ENTRYHI);
uasm_i_xor(&p, K0, K0, K1);
- UASM_i_SRL(&p, K0, K0, PAGE_SHIFT + 1);
+ uasm_i_dsrl32(&p, K1, K0, 62 - 32);
+ uasm_i_dsrl(&p, K0, K0, 12 + 1);
+ uasm_i_dsll32(&p, K0, K0, 64 + 12 + 1 - segbits - 32);
+ uasm_i_or(&p, K0, K0, K1);
uasm_il_bnez(&p, &r, K0, label_leave);
/* No need for uasm_i_nop */
}
@@ -1312,10 +1317,15 @@ static void __cpuinit build_r4000_tlb_load_handler(void)
memset(relocs, 0, sizeof(relocs));
if (bcm1250_m3_war()) {
- UASM_i_MFC0(&p, K0, C0_BADVADDR);
- UASM_i_MFC0(&p, K1, C0_ENTRYHI);
+ unsigned int segbits = 44;
+
+ uasm_i_dmfc0(&p, K0, C0_BADVADDR);
+ uasm_i_dmfc0(&p, K1, C0_ENTRYHI);
uasm_i_xor(&p, K0, K0, K1);
- UASM_i_SRL(&p, K0, K0, PAGE_SHIFT + 1);
+ uasm_i_dsrl32(&p, K1, K0, 62 - 32);
+ uasm_i_dsrl(&p, K0, K0, 12 + 1);
+ uasm_i_dsll32(&p, K0, K0, 64 + 12 + 1 - segbits - 32);
+ uasm_i_or(&p, K0, K0, K1);
uasm_il_bnez(&p, &r, K0, label_leave);
/* No need for uasm_i_nop */
}