aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc64/kernel/entry.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc64/kernel/entry.S')
-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 3e0badb820c5..b48349527853 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -42,19 +42,15 @@
42 * executing (see inherit_locked_prom_mappings() rant). 42 * executing (see inherit_locked_prom_mappings() rant).
43 */ 43 */
44sparc64_vpte_nucleus: 44sparc64_vpte_nucleus:
45 /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */ 45 /* Note that kvmap below has verified that the address is
46 mov 0xf, %g5 46 * in the range MODULES_VADDR --> VMALLOC_END already. So
47 sllx %g5, 28, %g5 47 * here we need only check if it is an OBP address or not.
48 48 */
49 /* Is addr >= LOW_OBP_ADDRESS? */ 49 sethi %hi(LOW_OBP_ADDRESS), %g5
50 cmp %g4, %g5 50 cmp %g4, %g5
51 blu,pn %xcc, sparc64_vpte_patchme1 51 blu,pn %xcc, sparc64_vpte_patchme1
52 mov 0x1, %g5 52 mov 0x1, %g5
53
54 /* Load 0x100000000, which is HI_OBP_ADDRESS. */
55 sllx %g5, 32, %g5 53 sllx %g5, 32, %g5
56
57 /* Is addr < HI_OBP_ADDRESS? */
58 cmp %g4, %g5 54 cmp %g4, %g5
59 blu,pn %xcc, obp_iaddr_patch 55 blu,pn %xcc, obp_iaddr_patch
60 nop 56 nop
@@ -156,26 +152,29 @@ obp_daddr_patch:
156 * rather, use information saved during inherit_prom_mappings() using 8k 152 * rather, use information saved during inherit_prom_mappings() using 8k
157 * pagesize. 153 * pagesize.
158 */ 154 */
155 .align 32
159kvmap: 156kvmap:
160 /* Load 0xf0000000, which is LOW_OBP_ADDRESS. */ 157 sethi %hi(MODULES_VADDR), %g5
161 mov 0xf, %g5 158 cmp %g4, %g5
162 sllx %g5, 28, %g5 159 blu,pn %xcc, longpath
160 mov (VMALLOC_END >> 24), %g5
161 sllx %g5, 24, %g5
162 cmp %g4, %g5
163 bgeu,pn %xcc, longpath
164 nop
163 165
164 /* Is addr >= LOW_OBP_ADDRESS? */ 166kvmap_check_obp:
167 sethi %hi(LOW_OBP_ADDRESS), %g5
165 cmp %g4, %g5 168 cmp %g4, %g5
166 blu,pn %xcc, vmalloc_addr 169 blu,pn %xcc, kvmap_vmalloc_addr
167 mov 0x1, %g5 170 mov 0x1, %g5
168
169 /* Load 0x100000000, which is HI_OBP_ADDRESS. */
170 sllx %g5, 32, %g5 171 sllx %g5, 32, %g5
171
172 /* Is addr < HI_OBP_ADDRESS? */
173 cmp %g4, %g5 172 cmp %g4, %g5
174 blu,pn %xcc, obp_daddr_patch 173 blu,pn %xcc, obp_daddr_patch
175 nop 174 nop
176 175
177vmalloc_addr: 176kvmap_vmalloc_addr:
178 /* If we get here, a vmalloc addr accessed, load kernel VPTE. */ 177 /* If we get here, a vmalloc addr was accessed, load kernel VPTE. */
179 ldxa [%g3 + %g6] ASI_N, %g5 178 ldxa [%g3 + %g6] ASI_N, %g5
180 brgez,pn %g5, longpath 179 brgez,pn %g5, longpath
181 nop 180 nop