summaryrefslogtreecommitdiffstats
path: root/arch/parisc/kernel/entry.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/parisc/kernel/entry.S')
-rw-r--r--arch/parisc/kernel/entry.S189
1 files changed, 86 insertions, 103 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index be0f07f2fa5..9af4b22a6d7 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -30,14 +30,14 @@
* - save registers to kernel stack and handle in assembly or C */
+#include <asm/psw.h>
#include <asm/assembly.h> /* for LDREG/STREG defines */
#include <asm/pgtable.h>
-#include <asm/psw.h>
#include <asm/signal.h>
#include <asm/unistd.h>
#include <asm/thread_info.h>
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
#define CMPIB cmpib,*
#define CMPB cmpb,*
#define COND(x) *x
@@ -67,19 +67,22 @@
/* Switch to virtual mapping, trashing only %r1 */
.macro virt_map
- rsm PSW_SM_Q,%r0
- tovirt_r1 %r29
- mfsp %sr7, %r1
- or,= %r0,%r1,%r0 /* Only save sr7 in sr3 if sr7 != 0 */
- mtsp %r1, %sr3
+ /* pcxt_ssm_bug */
+ 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
+ tovirt_r1 %r29
+ load32 KERNEL_PSW, %r1
+
+ rsm PSW_SM_QUIET,%r0 /* second "heavy weight" ctl op */
mtsp %r0, %sr6
mtsp %r0, %sr7
- load32 KERNEL_PSW, %r1
- mtctl %r1, %cr22
mtctl %r0, %cr17 /* Clear IIASQ tail */
mtctl %r0, %cr17 /* Clear IIASQ head */
+ mtctl %r1, %ipsw
load32 4f, %r1
mtctl %r1, %cr18 /* Set IIAOQ tail */
ldo 4(%r1), %r1
@@ -214,7 +217,7 @@
va = r8 /* virtual address for which the trap occured */
spc = r24 /* space for which the trap occured */
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
/*
* itlb miss interruption handler (parisc 1.1 - 32 bit)
@@ -236,7 +239,7 @@
.macro itlb_20 code
mfctl %pcsq, spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
b itlb_miss_20w
#else
b itlb_miss_20
@@ -246,7 +249,7 @@
.align 32
.endm
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
/*
* naitlb miss interruption handler (parisc 1.1 - 32 bit)
*
@@ -283,7 +286,7 @@
.macro naitlb_20 code
mfctl %isr,spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
b itlb_miss_20w
#else
b itlb_miss_20
@@ -296,7 +299,7 @@
.align 32
.endm
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
/*
* dtlb miss interruption handler (parisc 1.1 - 32 bit)
*/
@@ -318,7 +321,7 @@
.macro dtlb_20 code
mfctl %isr, spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
b dtlb_miss_20w
#else
b dtlb_miss_20
@@ -328,7 +331,7 @@
.align 32
.endm
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
/* nadtlb miss interruption handler (parisc 1.1 - 32 bit) */
.macro nadtlb_11 code
@@ -346,7 +349,7 @@
.macro nadtlb_20 code
mfctl %isr,spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
b nadtlb_miss_20w
#else
b nadtlb_miss_20
@@ -356,7 +359,7 @@
.align 32
.endm
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
/*
* dirty bit trap interruption handler (parisc 1.1 - 32 bit)
*/
@@ -378,7 +381,7 @@
.macro dbit_20 code
mfctl %isr,spc
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
b dbit_trap_20w
#else
b dbit_trap_20
@@ -391,7 +394,7 @@
/* The following are simple 32 vs 64 bit instruction
* abstractions for the macros */
.macro EXTR reg1,start,length,reg2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
extrd,u \reg1,32+\start,\length,\reg2
#else
extrw,u \reg1,\start,\length,\reg2
@@ -399,7 +402,7 @@
.endm
.macro DEP reg1,start,length,reg2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
depd \reg1,32+\start,\length,\reg2
#else
depw \reg1,\start,\length,\reg2
@@ -407,7 +410,7 @@
.endm
.macro DEPI val,start,length,reg
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
depdi \val,32+\start,\length,\reg
#else
depwi \val,\start,\length,\reg
@@ -418,7 +421,7 @@
* fault. We have to extract this and place it in the va,
* zeroing the corresponding bits in the space register */
.macro space_adjust spc,va,tmp
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
extrd,u \spc,63,SPACEID_SHIFT,\tmp
depd %r0,63,SPACEID_SHIFT,\spc
depd \tmp,31,SPACEID_SHIFT,\va
@@ -476,7 +479,7 @@
bb,>=,n \pmd,_PxD_PRESENT_BIT,\fault
DEP %r0,31,PxD_FLAG_SHIFT,\pmd /* clear flags */
copy \pmd,%r9
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
shld %r9,PxD_VALUE_SHIFT,\pmd
#else
shlw %r9,PxD_VALUE_SHIFT,\pmd
@@ -607,7 +610,7 @@
.macro do_alias spc,tmp,tmp1,va,pte,prot,fault
cmpib,COND(<>),n 0,\spc,\fault
ldil L%(TMPALIAS_MAP_START),\tmp
-#if defined(__LP64__) && (TMPALIAS_MAP_START >= 0x80000000)
+#if defined(CONFIG_64BIT) && (TMPALIAS_MAP_START >= 0x80000000)
/* on LP64, ldi will sign extend into the upper 32 bits,
* which is behaviour we don't want */
depdi 0,31,32,\tmp
@@ -621,7 +624,7 @@
* OK, it is in the temp alias region, check whether "from" or "to".
* Check "subtle" note in pacache.S re: r23/r26.
*/
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
extrd,u,*= \va,41,1,%r0
#else
extrw,u,= \va,9,1,%r0
@@ -688,7 +691,7 @@ fault_vector_20:
def 30
def 31
-#ifndef __LP64__
+#ifndef CONFIG_64BIT
.export fault_vector_11
@@ -761,7 +764,7 @@ __kernel_thread:
copy %r30, %r1
ldo PT_SZ_ALGN(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
/* Yo, function pointers in wide mode are little structs... -PB */
ldd 24(%r26), %r2
STREG %r2, PT_GR27(%r1) /* Store childs %dp */
@@ -777,7 +780,7 @@ __kernel_thread:
or %r26, %r24, %r26 /* will have kernel mappings. */
ldi 1, %r25 /* stack_start, signals kernel thread */
stw %r0, -52(%r30) /* user_tid */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
BL do_fork, %r2
@@ -806,7 +809,7 @@ ret_from_kernel_thread:
LDREG TI_TASK-THREAD_SZ_ALGN(%r30), %r1
LDREG TASK_PT_GR25(%r1), %r26
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
LDREG TASK_PT_GR27(%r1), %r27
LDREG TASK_PT_GR22(%r1), %r22
#endif
@@ -814,11 +817,16 @@ ret_from_kernel_thread:
ble 0(%sr7, %r1)
copy %r31, %r2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
loadgp /* Thread could have been in a module */
#endif
+#ifndef CONFIG_64BIT
b sys_exit
+#else
+ load32 sys_exit, %r1
+ bv %r0(%r1)
+#endif
ldi 0, %r26
.import sys_execve, code
@@ -830,7 +838,7 @@ __execve:
STREG %r26, PT_GR26(%r16)
STREG %r25, PT_GR25(%r16)
STREG %r24, PT_GR24(%r16)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
BL sys_execve, %r2
@@ -855,6 +863,7 @@ __execve:
_switch_to:
STREG %r2, -RP_OFFSET(%r30)
+ callee_save_float
callee_save
load32 _switch_to_ret, %r2
@@ -871,6 +880,7 @@ _switch_to:
_switch_to_ret:
mtctl %r0, %cr0 /* Needed for single stepping */
callee_rest
+ callee_rest_float
LDREG -RP_OFFSET(%r30), %r2
bv %r0(%r2)
@@ -888,9 +898,6 @@ _switch_to_ret:
* this way, then we will need to copy %sr3 in to PT_SR[3..7], and
* adjust IASQ[0..1].
*
- * Note that the following code uses a "relied upon translation".
- * See the parisc ACD for details. The ssm is necessary due to a
- * PCXT bug.
*/
.align 4096
@@ -911,7 +918,7 @@ syscall_exit_rfi:
STREG %r19,PT_IAOQ1(%r16)
LDREG PT_PSW(%r16),%r19
load32 USER_PSW_MASK,%r1
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
load32 USER_PSW_HI_MASK,%r20
depd %r20,31,32,%r1
#endif
@@ -955,7 +962,7 @@ intr_return:
/* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) amount
** irq_stat[] is defined using ____cacheline_aligned.
*/
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
shld %r1, 6, %r20
#else
shlw %r1, 5, %r20
@@ -963,9 +970,6 @@ intr_return:
add %r19,%r20,%r19 /* now have &irq_stat[smp_processor_id()] */
#endif /* CONFIG_SMP */
- LDREG IRQSTAT_SIRQ_PEND(%r19),%r20 /* hardirq.h: unsigned long */
- cmpib,<>,n 0,%r20,intr_do_softirq /* forward */
-
intr_check_resched:
/* check for reschedule */
@@ -985,24 +989,19 @@ intr_restore:
rest_fp %r1
rest_general %r29
- /* Create a "relied upon translation" PA 2.0 Arch. F-5 */
- ssm 0,%r0
- nop
- nop
- nop
- nop
- nop
- nop
- nop
+ /* inverse of virt_map */
+ pcxt_ssm_bug
+ rsm PSW_SM_QUIET,%r0 /* prepare for rfi */
tophys_r1 %r29
- rsm (PSW_SM_Q|PSW_SM_P|PSW_SM_D|PSW_SM_I),%r0
/* Restore space id's and special cr's from PT_REGS
- * structure pointed to by r29 */
+ * structure pointed to by r29
+ */
rest_specials %r29
- /* Important: Note that rest_stack restores r29
- * last (we are using it)! It also restores r1 and r30. */
+ /* IMPORTANT: rest_stack restores r29 last (we are using it)!
+ * It also restores r1 and r30.
+ */
rest_stack
rfi
@@ -1015,17 +1014,6 @@ intr_restore:
nop
nop
- .import do_softirq,code
-intr_do_softirq:
- bl do_softirq,%r2
-#ifdef __LP64__
- ldo -16(%r30),%r29 /* Reference param save area */
-#else
- nop
-#endif
- b intr_check_resched
- nop
-
.import schedule,code
intr_do_resched:
/* Only do reschedule if we are returning to user space */
@@ -1036,12 +1024,17 @@ intr_do_resched:
CMPIB= 0,%r20,intr_restore /* backward */
nop
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
ldil L%intr_check_sig, %r2
+#ifndef CONFIG_64BIT
b schedule
+#else
+ load32 schedule, %r20
+ bv %r0(%r20)
+#endif
ldo R%intr_check_sig(%r2), %r2
@@ -1064,7 +1057,7 @@ intr_do_signal:
copy %r0, %r24 /* unsigned long in_syscall */
copy %r16, %r25 /* struct pt_regs *regs */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
@@ -1088,7 +1081,7 @@ intr_extint:
mfctl %cr31,%r1
copy %r30,%r17
/* FIXME! depi below has hardcoded idea of interrupt stack size (32k)*/
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
depdi 0,63,15,%r17
#else
depi 0,31,15,%r17
@@ -1115,7 +1108,7 @@ intr_extint:
ldil L%intr_return, %r2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
@@ -1153,15 +1146,17 @@ intr_save:
CMPIB=,n 6,%r26,skip_save_ior
- /* save_specials left ipsw value in r8 for us to test */
mfctl %cr20, %r16 /* isr */
+ nop /* serialize mfctl on PA 2.0 to avoid 4 cycle penalty */
mfctl %cr21, %r17 /* ior */
-#ifdef __LP64__
+
+#ifdef CONFIG_64BIT
/*
* If the interrupted code was running with W bit off (32 bit),
* clear the b bits (bits 0 & 1) in the ior.
+ * save_specials left ipsw value in r8 for us to test.
*/
extrd,u,*<> %r8,PSW_W_BIT,1,%r0
depdi 0,1,2,%r17
@@ -1192,7 +1187,7 @@ skip_save_ior:
loadgp
copy %r29, %r25 /* arg1 is pt_regs */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
@@ -1230,7 +1225,7 @@ skip_save_ior:
spc = r24 /* space for which the trap occured */
ptp = r25 /* page directory/page table pointer */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
dtlb_miss_20w:
space_adjust spc,va,t0
@@ -1487,10 +1482,10 @@ nadtlb_emulate:
add,l %r1,%r24,%r1 /* doesn't affect c/b bits */
nadtlb_nullify:
- mfctl %cr22,%r8 /* Get ipsw */
+ mfctl %ipsw,%r8
ldil L%PSW_N,%r9
or %r8,%r9,%r8 /* Set PSW_N */
- mtctl %r8,%cr22
+ mtctl %r8,%ipsw
rfir
nop
@@ -1521,7 +1516,7 @@ nadtlb_probe_check:
nop
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
itlb_miss_20w:
/*
@@ -1588,7 +1583,7 @@ itlb_miss_20:
#endif
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
dbit_trap_20w:
space_adjust spc,va,t0
@@ -1797,7 +1792,7 @@ sys_fork_wrapper:
STREG %r2,-RP_OFFSET(%r30)
ldo FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
@@ -1847,10 +1842,11 @@ sys_clone_wrapper:
STREG %r2,-RP_OFFSET(%r30)
ldo FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
+ /* WARNING - Clobbers r19 and r21, userspace must save these! */
STREG %r2,PT_GR19(%r1) /* save for child */
STREG %r30,PT_GR21(%r1)
BL sys_clone,%r2
@@ -1869,7 +1865,7 @@ sys_vfork_wrapper:
STREG %r2,-RP_OFFSET(%r30)
ldo FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
@@ -1897,10 +1893,10 @@ sys_vfork_wrapper:
STREG %r2,-RP_OFFSET(%r30)
ldo FRAME_SIZE(%r30),%r30
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
- bl \execve,%r2
+ BL \execve,%r2
copy %r1,%arg0
ldo -FRAME_SIZE(%r30),%r30
@@ -1923,7 +1919,7 @@ error_\execve:
sys_execve_wrapper:
execve_wrapper sys_execve
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
.export sys32_execve_wrapper
.import sys32_execve
@@ -1937,7 +1933,7 @@ sys_rt_sigreturn_wrapper:
ldo TASK_REGS(%r26),%r26 /* get pt regs */
/* Don't save regs, we are going to restore them from sigcontext. */
STREG %r2, -RP_OFFSET(%r30)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo FRAME_SIZE(%r30), %r30
BL sys_rt_sigreturn,%r2
ldo -16(%r30),%r29 /* Reference param save area */
@@ -1968,7 +1964,7 @@ sys_sigaltstack_wrapper:
ldo TASK_REGS(%r1),%r24 /* get pt regs */
LDREG TASK_PT_GR30(%r24),%r24
STREG %r2, -RP_OFFSET(%r30)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo FRAME_SIZE(%r30), %r30
b,l do_sigaltstack,%r2
ldo -16(%r30),%r29 /* Reference param save area */
@@ -1982,7 +1978,7 @@ sys_sigaltstack_wrapper:
bv %r0(%r2)
nop
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
.export sys32_sigaltstack_wrapper
sys32_sigaltstack_wrapper:
/* Get the user stack pointer */
@@ -2006,7 +2002,7 @@ sys_rt_sigsuspend_wrapper:
reg_save %r24
STREG %r2, -RP_OFFSET(%r30)
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo FRAME_SIZE(%r30), %r30
b,l sys_rt_sigsuspend,%r2
ldo -16(%r30),%r29 /* Reference param save area */
@@ -2079,7 +2075,7 @@ syscall_check_bh:
ldw TI_CPU-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26 /* cpu # */
/* shift left ____cacheline_aligned (aka L1_CACHE_BYTES) bits */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
shld %r26, 6, %r20
#else
shlw %r26, 5, %r20
@@ -2087,9 +2083,6 @@ syscall_check_bh:
add %r19,%r20,%r19 /* now have &irq_stat[smp_processor_id()] */
#endif /* CONFIG_SMP */
- LDREG IRQSTAT_SIRQ_PEND(%r19),%r20 /* hardirq.h: unsigned long */
- cmpib,<>,n 0,%r20,syscall_do_softirq /* forward */
-
syscall_check_resched:
/* check for reschedule */
@@ -2144,7 +2137,7 @@ syscall_restore:
depi 3,31,2,%r31 /* ensure return to user mode. */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
/* decide whether to reset the wide mode bit
*
* For a syscall, the W bit is stored in the lowest bit
@@ -2227,20 +2220,10 @@ pt_regs_ok:
b intr_restore
nop
- .import do_softirq,code
-syscall_do_softirq:
- bl do_softirq,%r2
- nop
- /* NOTE: We enable I-bit incase we schedule later,
- * and we might be going back to userspace if we were
- * traced. */
- b syscall_check_resched
- ssm PSW_SM_I, %r0 /* do_softirq returns with I bit off */
-
.import schedule,code
syscall_do_resched:
BL schedule,%r2
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#else
nop
@@ -2260,7 +2243,7 @@ syscall_do_signal:
ldi 1, %r24 /* unsigned long in_syscall */
-#ifdef __LP64__
+#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
BL do_signal,%r2