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-rw-r--r--arch/parisc/kernel/entry.S174
1 files changed, 93 insertions, 81 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 4bb96ad9b0b1..e8f07dd28401 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -65,15 +65,11 @@
rsm PSW_SM_I, %r0 /* barrier for "Relied upon Translation */
mtsp %r0, %sr4
mtsp %r0, %sr5
- mfsp %sr7, %r1
- or,= %r0,%r1,%r0 /* Only save sr7 in sr3 if sr7 != 0 */
- mtsp %r1, %sr3
+ mtsp %r0, %sr6
tovirt_r1 %r29
load32 KERNEL_PSW, %r1
rsm PSW_SM_QUIET,%r0 /* second "heavy weight" ctl op */
- mtsp %r0, %sr6
- mtsp %r0, %sr7
mtctl %r0, %cr17 /* Clear IIASQ tail */
mtctl %r0, %cr17 /* Clear IIASQ head */
mtctl %r1, %ipsw
@@ -119,17 +115,20 @@
/* we save the registers in the task struct */
+ copy %r30, %r17
mfctl %cr30, %r1
+ ldo THREAD_SZ_ALGN(%r1), %r30
+ mtsp %r0,%sr7
+ mtsp %r16,%sr3
tophys %r1,%r9
LDREG TI_TASK(%r9), %r1 /* thread_info -> task_struct */
tophys %r1,%r9
ldo TASK_REGS(%r9),%r9
- STREG %r30, PT_GR30(%r9)
+ STREG %r17,PT_GR30(%r9)
STREG %r29,PT_GR29(%r9)
STREG %r26,PT_GR26(%r9)
+ STREG %r16,PT_SR7(%r9)
copy %r9,%r29
- mfctl %cr30, %r1
- ldo THREAD_SZ_ALGN(%r1), %r30
.endm
.macro get_stack_use_r30
@@ -137,10 +136,12 @@
/* we put a struct pt_regs on the stack and save the registers there */
tophys %r30,%r9
- STREG %r30,PT_GR30(%r9)
+ copy %r30,%r1
ldo PT_SZ_ALGN(%r30),%r30
+ STREG %r1,PT_GR30(%r9)
STREG %r29,PT_GR29(%r9)
STREG %r26,PT_GR26(%r9)
+ STREG %r16,PT_SR7(%r9)
copy %r9,%r29
.endm
@@ -452,9 +453,41 @@
L2_ptep \pgd,\pte,\index,\va,\fault
.endm
+ /* Acquire pa_dbit_lock lock. */
+ .macro dbit_lock spc,tmp,tmp1
+#ifdef CONFIG_SMP
+ cmpib,COND(=),n 0,\spc,2f
+ load32 PA(pa_dbit_lock),\tmp
+1: LDCW 0(\tmp),\tmp1
+ cmpib,COND(=) 0,\tmp1,1b
+ nop
+2:
+#endif
+ .endm
+
+ /* Release pa_dbit_lock lock without reloading lock address. */
+ .macro dbit_unlock0 spc,tmp
+#ifdef CONFIG_SMP
+ or,COND(=) %r0,\spc,%r0
+ stw \spc,0(\tmp)
+#endif
+ .endm
+
+ /* Release pa_dbit_lock lock. */
+ .macro dbit_unlock1 spc,tmp
+#ifdef CONFIG_SMP
+ load32 PA(pa_dbit_lock),\tmp
+ dbit_unlock0 \spc,\tmp
+#endif
+ .endm
+
/* Set the _PAGE_ACCESSED bit of the PTE. Be clever and
* don't needlessly dirty the cache line if it was already set */
- .macro update_ptep ptep,pte,tmp,tmp1
+ .macro update_ptep spc,ptep,pte,tmp,tmp1
+#ifdef CONFIG_SMP
+ or,COND(=) %r0,\spc,%r0
+ LDREG 0(\ptep),\pte
+#endif
ldi _PAGE_ACCESSED,\tmp1
or \tmp1,\pte,\tmp
and,COND(<>) \tmp1,\pte,%r0
@@ -463,7 +496,11 @@
/* Set the dirty bit (and accessed bit). No need to be
* clever, this is only used from the dirty fault */
- .macro update_dirty ptep,pte,tmp
+ .macro update_dirty spc,ptep,pte,tmp
+#ifdef CONFIG_SMP
+ or,COND(=) %r0,\spc,%r0
+ LDREG 0(\ptep),\pte
+#endif
ldi _PAGE_ACCESSED|_PAGE_DIRTY,\tmp
or \tmp,\pte,\pte
STREG \pte,0(\ptep)
@@ -1111,11 +1148,13 @@ dtlb_miss_20w:
L3_ptep ptp,pte,t0,va,dtlb_check_alias_20w
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
idtlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1135,11 +1174,13 @@ nadtlb_miss_20w:
L3_ptep ptp,pte,t0,va,nadtlb_check_alias_20w
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
idtlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1161,7 +1202,8 @@ dtlb_miss_11:
L2_ptep ptp,pte,t0,va,dtlb_check_alias_11
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb_11 spc,pte,prot
@@ -1172,6 +1214,7 @@ dtlb_miss_11:
idtlbp prot,(%sr1,va)
mtsp t0, %sr1 /* Restore sr1 */
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1192,7 +1235,8 @@ nadtlb_miss_11:
L2_ptep ptp,pte,t0,va,nadtlb_check_alias_11
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb_11 spc,pte,prot
@@ -1204,6 +1248,7 @@ nadtlb_miss_11:
idtlbp prot,(%sr1,va)
mtsp t0, %sr1 /* Restore sr1 */
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1224,13 +1269,15 @@ dtlb_miss_20:
L2_ptep ptp,pte,t0,va,dtlb_check_alias_20
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
f_extend pte,t0
idtlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1250,13 +1297,15 @@ nadtlb_miss_20:
L2_ptep ptp,pte,t0,va,nadtlb_check_alias_20
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
f_extend pte,t0
idtlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1357,11 +1406,13 @@ itlb_miss_20w:
L3_ptep ptp,pte,t0,va,itlb_fault
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
iitlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1379,11 +1430,13 @@ naitlb_miss_20w:
L3_ptep ptp,pte,t0,va,naitlb_check_alias_20w
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
iitlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1405,7 +1458,8 @@ itlb_miss_11:
L2_ptep ptp,pte,t0,va,itlb_fault
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb_11 spc,pte,prot
@@ -1416,6 +1470,7 @@ itlb_miss_11:
iitlbp prot,(%sr1,va)
mtsp t0, %sr1 /* Restore sr1 */
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1427,7 +1482,8 @@ naitlb_miss_11:
L2_ptep ptp,pte,t0,va,naitlb_check_alias_11
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb_11 spc,pte,prot
@@ -1438,6 +1494,7 @@ naitlb_miss_11:
iitlbp prot,(%sr1,va)
mtsp t0, %sr1 /* Restore sr1 */
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1459,13 +1516,15 @@ itlb_miss_20:
L2_ptep ptp,pte,t0,va,itlb_fault
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
f_extend pte,t0
iitlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1477,13 +1536,15 @@ naitlb_miss_20:
L2_ptep ptp,pte,t0,va,naitlb_check_alias_20
- update_ptep ptp,pte,t0,t1
+ dbit_lock spc,t0,t1
+ update_ptep spc,ptp,pte,t0,t1
make_insert_tlb spc,pte,prot
f_extend pte,t0
iitlbt pte,prot
+ dbit_unlock1 spc,t0
rfir
nop
@@ -1507,29 +1568,13 @@ dbit_trap_20w:
L3_ptep ptp,pte,t0,va,dbit_fault
-#ifdef CONFIG_SMP
- cmpib,COND(=),n 0,spc,dbit_nolock_20w
- load32 PA(pa_dbit_lock),t0
-
-dbit_spin_20w:
- LDCW 0(t0),t1
- cmpib,COND(=) 0,t1,dbit_spin_20w
- nop
-
-dbit_nolock_20w:
-#endif
- update_dirty ptp,pte,t1
+ dbit_lock spc,t0,t1
+ update_dirty spc,ptp,pte,t1
make_insert_tlb spc,pte,prot
idtlbt pte,prot
-#ifdef CONFIG_SMP
- cmpib,COND(=),n 0,spc,dbit_nounlock_20w
- ldi 1,t1
- stw t1,0(t0)
-
-dbit_nounlock_20w:
-#endif
+ dbit_unlock0 spc,t0
rfir
nop
@@ -1543,18 +1588,8 @@ dbit_trap_11:
L2_ptep ptp,pte,t0,va,dbit_fault
-#ifdef CONFIG_SMP
- cmpib,COND(=),n 0,spc,dbit_nolock_11
- load32 PA(pa_dbit_lock),t0
-
-dbit_spin_11:
- LDCW 0(t0),t1
- cmpib,= 0,t1,dbit_spin_11
- nop
-
-dbit_nolock_11:
-#endif
- update_dirty ptp,pte,t1
+ dbit_lock spc,t0,t1
+ update_dirty spc,ptp,pte,t1
make_insert_tlb_11 spc,pte,prot
@@ -1565,13 +1600,7 @@ dbit_nolock_11:
idtlbp prot,(%sr1,va)
mtsp t1, %sr1 /* Restore sr1 */
-#ifdef CONFIG_SMP
- cmpib,COND(=),n 0,spc,dbit_nounlock_11
- ldi 1,t1
- stw t1,0(t0)
-
-dbit_nounlock_11:
-#endif
+ dbit_unlock0 spc,t0
rfir
nop
@@ -1583,32 +1612,15 @@ dbit_trap_20:
L2_ptep ptp,pte,t0,va,dbit_fault
-#ifdef CONFIG_SMP
- cmpib,COND(=),n 0,spc,dbit_nolock_20
- load32 PA(pa_dbit_lock),t0
-
-dbit_spin_20:
- LDCW 0(t0),t1
- cmpib,= 0,t1,dbit_spin_20
- nop
-
-dbit_nolock_20:
-#endif
- update_dirty ptp,pte,t1
+ dbit_lock spc,t0,t1
+ update_dirty spc,ptp,pte,t1
make_insert_tlb spc,pte,prot
f_extend pte,t1
idtlbt pte,prot
-
-#ifdef CONFIG_SMP
- cmpib,COND(=),n 0,spc,dbit_nounlock_20
- ldi 1,t1
- stw t1,0(t0)
-
-dbit_nounlock_20:
-#endif
+ dbit_unlock0 spc,t0
rfir
nop
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 18:37:50 +0000