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-rw-r--r--arch/sparc/kernel/entry.S111
1 files changed, 32 insertions, 79 deletions
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index 4bcfe54f878..faf9ccd9ef5 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -19,11 +19,8 @@
#include <asm/vaddrs.h>
#include <asm/memreg.h>
#include <asm/page.h>
-#ifdef CONFIG_SUN4
-#include <asm/pgtsun4.h>
-#else
+#include <asm/pgtable.h>
#include <asm/pgtsun4c.h>
-#endif
#include <asm/winmacro.h>
#include <asm/signal.h>
#include <asm/obio.h>
@@ -275,17 +272,18 @@ smp4m_ticker:
*/
maybe_smp4m_msg:
GET_PROCESSOR4M_ID(o3)
- set sun4m_interrupts, %l5
- ld [%l5], %o5
+ sethi %hi(sun4m_irq_percpu), %l5
+ sll %o3, 2, %o3
+ or %l5, %lo(sun4m_irq_percpu), %o5
sethi %hi(0x40000000), %o2
- sll %o3, 12, %o3
ld [%o5 + %o3], %o1
- andcc %o1, %o2, %g0
+ ld [%o1 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending
+ andcc %o3, %o2, %g0
be,a smp4m_ticker
cmp %l7, 14
- st %o2, [%o5 + 0x4]
+ st %o2, [%o1 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x40000000
WRITE_PAUSE
- ld [%o5], %g0
+ ld [%o1 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
@@ -303,16 +301,16 @@ linux_trap_ipi15_sun4m:
SAVE_ALL
sethi %hi(0x80000000), %o2
GET_PROCESSOR4M_ID(o0)
- set sun4m_interrupts, %l5
- ld [%l5], %o5
- sll %o0, 12, %o0
- add %o5, %o0, %o5
- ld [%o5], %o3
+ sethi %hi(sun4m_irq_percpu), %l5
+ or %l5, %lo(sun4m_irq_percpu), %o5
+ sll %o0, 2, %o0
+ ld [%o5 + %o0], %o5
+ ld [%o5 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending
andcc %o3, %o2, %g0
be 1f ! Must be an NMI async memory error
- st %o2, [%o5 + 4]
+ st %o2, [%o5 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x80000000
WRITE_PAUSE
- ld [%o5], %g0
+ ld [%o5 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
@@ -326,12 +324,11 @@ linux_trap_ipi15_sun4m:
1:
/* NMI async memory error handling. */
sethi %hi(0x80000000), %l4
- sethi %hi(0x4000), %o3
- sub %o5, %o0, %o5
- add %o5, %o3, %l5
- st %l4, [%l5 + 0xc]
+ sethi %hi(sun4m_irq_global), %o5
+ ld [%o5 + %lo(sun4m_irq_global)], %l5
+ st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000
WRITE_PAUSE
- ld [%l5], %g0
+ ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
@@ -340,9 +337,9 @@ linux_trap_ipi15_sun4m:
WRITE_PAUSE
call sun4m_nmi
nop
- st %l4, [%l5 + 0x8]
+ st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000
WRITE_PAUSE
- ld [%l5], %g0
+ ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
RESTORE_ALL
@@ -774,11 +771,7 @@ vac_linesize_patch_32: subcc %l7, 32, %l7
* Ugly, but we cant use hardware flushing on the sun4 and we'd require
* two instructions (Anton)
*/
-#ifdef CONFIG_SUN4
-vac_hwflush_patch1_on: nop
-#else
vac_hwflush_patch1_on: addcc %l7, -PAGE_SIZE, %l7
-#endif
vac_hwflush_patch2_on: sta %g0, [%l3 + %l7] ASI_HWFLUSHSEG
@@ -797,42 +790,10 @@ vac_hwflush_patch2_on: sta %g0, [%l3 + %l7] ASI_HWFLUSHSEG
! %l7 = 1 for textfault
! We want error in %l5, vaddr in %l6
sun4c_fault:
-#ifdef CONFIG_SUN4
- sethi %hi(sun4c_memerr_reg), %l4
- ld [%l4+%lo(sun4c_memerr_reg)], %l4 ! memerr ctrl reg addr
- ld [%l4], %l6 ! memerr ctrl reg
- ld [%l4 + 4], %l5 ! memerr vaddr reg
- andcc %l6, 0x80, %g0 ! check for error type
- st %g0, [%l4 + 4] ! clear the error
- be 0f ! normal error
- sethi %hi(AC_BUS_ERROR), %l4 ! bus err reg addr
-
- call prom_halt ! something weird happened
- ! what exactly did happen?
- ! what should we do here?
-
-0: or %l4, %lo(AC_BUS_ERROR), %l4 ! bus err reg addr
- lduba [%l4] ASI_CONTROL, %l6 ! bus err reg
-
- cmp %l7, 1 ! text fault?
- be 1f ! yes
- nop
-
- ld [%l1], %l4 ! load instruction that caused fault
- srl %l4, 21, %l4
- andcc %l4, 1, %g0 ! store instruction?
-
- be 1f ! no
- sethi %hi(SUN4C_SYNC_BADWRITE), %l4 ! yep
- ! %lo(SUN4C_SYNC_BADWRITE) = 0
- or %l4, %l6, %l6 ! set write bit to emulate sun4c
-1:
-#else
sethi %hi(AC_SYNC_ERR), %l4
add %l4, 0x4, %l6 ! AC_SYNC_VA in %l6
lda [%l6] ASI_CONTROL, %l5 ! Address
lda [%l4] ASI_CONTROL, %l6 ! Error, retained for a bit
-#endif
andn %l5, 0xfff, %l5 ! Encode all info into l7
srl %l6, 14, %l4
@@ -879,12 +840,7 @@ sun4c_fault:
or %l4, %lo(swapper_pg_dir), %l4
sll %l6, 2, %l6
ld [%l4 + %l6], %l4
-#ifdef CONFIG_SUN4
- sethi %hi(PAGE_MASK), %l6
- andcc %l4, %l6, %g0
-#else
andcc %l4, PAGE_MASK, %g0
-#endif
be sun4c_fault_fromuser
lduXa [%l5] ASI_SEGMAP, %l4
@@ -936,11 +892,7 @@ invalid_segment_patch1:
ld [%l6 + 0x08], %l3 ! tmp = entry->vaddr
! Flush segment from the cache.
-#ifdef CONFIG_SUN4
- sethi %hi((128 * 1024)), %l7
-#else
sethi %hi((64 * 1024)), %l7
-#endif
9:
vac_hwflush_patch1:
vac_linesize_patch:
@@ -1028,12 +980,7 @@ invalid_segment_patch2:
or %l4, %lo(swapper_pg_dir), %l4
sll %l3, 2, %l3
ld [%l4 + %l3], %l4
-#ifndef CONFIG_SUN4
and %l4, PAGE_MASK, %l4
-#else
- sethi %hi(PAGE_MASK), %l6
- and %l4, %l6, %l4
-#endif
srl %l5, (PAGE_SHIFT - 2), %l6
and %l6, ((SUN4C_PTRS_PER_PTE - 1) << 2), %l6
@@ -1195,8 +1142,9 @@ sys_rt_sigreturn:
be 1f
nop
+ add %sp, STACKFRAME_SZ, %o0
call syscall_trace
- nop
+ mov 1, %o1
1:
/* We are returning to a signal handler. */
@@ -1286,8 +1234,12 @@ linux_fast_syscall:
mov %i3, %o3
linux_syscall_trace:
+ add %sp, STACKFRAME_SZ, %o0
call syscall_trace
- nop
+ mov 0, %o1
+ cmp %o0, 0
+ bne 3f
+ mov -ENOSYS, %o0
mov %i0, %o0
mov %i1, %o1
mov %i2, %o2
@@ -1317,7 +1269,6 @@ linux_sparc_syscall:
bne linux_fast_syscall
/* Just do first insn from SAVE_ALL in the delay slot */
- .globl syscall_is_too_hard
syscall_is_too_hard:
SAVE_ALL_HEAD
rd %wim, %l3
@@ -1337,6 +1288,7 @@ syscall_is_too_hard:
call %l7
mov %i5, %o5
+3:
st %o0, [%sp + STACKFRAME_SZ + PT_I0]
ret_sys_call:
@@ -1374,6 +1326,8 @@ ret_sys_call:
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
linux_syscall_trace2:
+ add %sp, STACKFRAME_SZ, %o0
+ mov 1, %o1
call syscall_trace
add %l1, 0x4, %l2 /* npc = npc+4 */
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
@@ -1544,8 +1498,7 @@ kgdb_trap_low:
#endif
.align 4
- .globl __handle_exception, flush_patch_exception
-__handle_exception:
+ .globl flush_patch_exception
flush_patch_exception:
FLUSH_ALL_KERNEL_WINDOWS;
ldd [%o0], %o6
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-24 09:46:09 +0000