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authorDavid S. Miller <davem@sunset.davemloft.net>2005-09-20 12:18:38 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2005-09-20 12:18:38 -0700
commit729b4f7de68191478b20fab19a6d0c6b8c4380c9 (patch)
treec3515037d7797643a6f83e2331ab9d2cd1dd1f64 /arch/sparc64
parent6a9b490d5fd7f23c5bcd75f970e01633ad3136e3 (diff)
[SPARC64]: Verify vmalloc TLB misses more strictly.
Arrange the modules, OBP, and vmalloc areas such that a range verification can be done quite minimally. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/kernel/entry.S39
1 files changed, 19 insertions, 20 deletions
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index 3e0badb820c..b4834952785 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -42,19 +42,15 @@
* executing (see inherit_locked_prom_mappings() rant).
*/
sparc64_vpte_nucleus:
- /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */
- mov 0xf, %g5
- sllx %g5, 28, %g5
-
- /* Is addr >= LOW_OBP_ADDRESS? */
+ /* Note that kvmap below has verified that the address is
+ * in the range MODULES_VADDR --> VMALLOC_END already. So
+ * here we need only check if it is an OBP address or not.
+ */
+ sethi %hi(LOW_OBP_ADDRESS), %g5
cmp %g4, %g5
blu,pn %xcc, sparc64_vpte_patchme1
mov 0x1, %g5
-
- /* Load 0x100000000, which is HI_OBP_ADDRESS. */
sllx %g5, 32, %g5
-
- /* Is addr < HI_OBP_ADDRESS? */
cmp %g4, %g5
blu,pn %xcc, obp_iaddr_patch
nop
@@ -156,26 +152,29 @@ obp_daddr_patch:
* rather, use information saved during inherit_prom_mappings() using 8k
* pagesize.
*/
+ .align 32
kvmap:
- /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */
- mov 0xf, %g5
- sllx %g5, 28, %g5
+ sethi %hi(MODULES_VADDR), %g5
+ cmp %g4, %g5
+ blu,pn %xcc, longpath
+ mov (VMALLOC_END >> 24), %g5
+ sllx %g5, 24, %g5
+ cmp %g4, %g5
+ bgeu,pn %xcc, longpath
+ nop
- /* Is addr >= LOW_OBP_ADDRESS? */
+kvmap_check_obp:
+ sethi %hi(LOW_OBP_ADDRESS), %g5
cmp %g4, %g5
- blu,pn %xcc, vmalloc_addr
+ blu,pn %xcc, kvmap_vmalloc_addr
mov 0x1, %g5
-
- /* Load 0x100000000, which is HI_OBP_ADDRESS. */
sllx %g5, 32, %g5
-
- /* Is addr < HI_OBP_ADDRESS? */
cmp %g4, %g5
blu,pn %xcc, obp_daddr_patch
nop
-vmalloc_addr:
- /* If we get here, a vmalloc addr accessed, load kernel VPTE. */
+kvmap_vmalloc_addr:
+ /* If we get here, a vmalloc addr was accessed, load kernel VPTE. */
ldxa [%g3 + %g6] ASI_N, %g5
brgez,pn %g5, longpath
nop