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-rw-r--r--arch/sparc64/kernel/entry.S199
1 files changed, 72 insertions, 127 deletions
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index 76f913ade..774839af6 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -1,10 +1,10 @@
-/* $Id: entry.S,v 1.76 1998/01/05 17:00:13 jj Exp $
+/* $Id: entry.S,v 1.87 1998/07/29 16:32:28 jj Exp $
* arch/sparc64/kernel/entry.S: Sparc64 trap low-level entry points.
*
* Copyright (C) 1995,1997 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
- * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/config.h>
@@ -18,6 +18,7 @@
#include <asm/signal.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
+#include <asm/visasm.h>
/* #define SYSCALL_TRACING */
@@ -26,117 +27,23 @@
#define NR_SYSCALLS 256 /* Each OS is different... */
.text
- .globl sparc64_dtlb_prot_catch, sparc64_dtlb_refbit_catch
- .globl sparc64_itlb_refbit_catch
-
- /* Note, DMMU SFAR not updated for fast tlb data access miss
- * traps, so we must use tag access to find the right page.
- * However for DMMU fast protection traps it is updated so
- * we use, but we must also clear it _before_ we enable interrupts
- * and save state because there is a race where we can push a user
- * window right now in etrap, a protection fault happens (for example
- * to update the dirty bit) and since we left crap in the sfsr
- * it will not get updated properly.
- */
- .align 32
-sparc64_dtlb_prot_catch:
- wr %g0, ASI_DMMU, %asi
- rdpr %pstate, %g1
- wrpr %g1, PSTATE_AG|PSTATE_MG, %pstate
- rdpr %tl, %g3
- ldxa [%g0 + TLB_TAG_ACCESS] %asi, %g5
- stxa %g0, [%g0 + TLB_SFSR] %asi
- membar #Sync
- cmp %g3, 1
-
- bgu,a,pn %icc, winfix_trampoline
- rdpr %tpc, %g3
- sethi %hi(109f), %g7
- ba,pt %xcc, etrap
-109: or %g7, %lo(109b), %g7
- b,pt %xcc, 1f
- mov 1, %o2
- .align 32
-sparc64_dtlb_refbit_catch:
- srlx %g5, 9, %g4
- and %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9), %g4
- cmp %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9)
- be,a,pt %xcc, 2f
- mov 1, %g4
- wr %g0, ASI_DMMU, %asi
- rdpr %pstate, %g1
- wrpr %g1, PSTATE_AG|PSTATE_MG, %pstate
-
- rdpr %tl, %g3
- ldxa [%g0 + TLB_TAG_ACCESS] %asi, %g5
- cmp %g3, 1
- bgu,pn %icc, winfix_trampoline
- rdpr %tpc, %g3
- sethi %hi(109f), %g7
- b,pt %xcc, etrap
-109: or %g7, %lo(109b), %g7
-
- clr %o2
-1: srlx %l5, PAGE_SHIFT, %o1
- add %sp, STACK_BIAS + REGWIN_SZ, %o0
- call do_sparc64_fault
- sllx %o1, PAGE_SHIFT, %o1
- b,pt %xcc, rtrap
- clr %l6
.align 32
-sparc64_itlb_refbit_catch:
- srlx %g5, 9, %g4
- and %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9), %g4
- cmp %g4, ((_PAGE_PRESENT | _PAGE_READ) >> 9)
- be,a,pt %xcc, 3f
- mov 1, %g4
- rdpr %pstate, %g1
- wrpr %g1, PSTATE_AG|PSTATE_MG, %pstate
- rdpr %tpc, %g5
- sethi %hi(109f), %g7
- b,pt %xcc, etrap
-109: or %g7, %lo(109b), %g7
- b,pt %xcc, 1b
- clr %o2
-
- .align 32
-2: sllx %g4, 63, %g4 ! _PAGE_VALID
- or %g5, _PAGE_ACCESSED, %g5
- or %g5, %g4, %g5
- stxa %g5, [%g3 + %g1] ASI_PHYS_USE_EC ! store new PTE
- stxa %g5, [%g0] ASI_DTLB_DATA_IN ! TLB load
- retry
-
- .align 32
-3: sllx %g4, 63, %g4 ! _PAGE_VALID
- or %g5, _PAGE_ACCESSED, %g5
- or %g5, %g4, %g5
- stxa %g5, [%g3 + %g1] ASI_PHYS_USE_EC ! store new PTE
- stxa %g5, [%g0] ASI_ITLB_DATA_IN ! TLB load
- retry
-
-#define FPDIS_OFF (((PAGE_SIZE<<1)-((64*4)+(2*8))) & ~(64 - 1))
/* This is trivial with the new code... */
.align 32
.globl do_fpdis
do_fpdis:
- lduh [%g6 + AOFF_task_tss + AOFF_thread_flags], %g5 ! Load Group
+ ldub [%g6 + AOFF_task_tss + AOFF_thread_fpsaved], %g5 ! Load Group
sethi %hi(TSTATE_PEF), %g4 ! IEU0
- sethi %hi(FPDIS_OFF), %g3 ! IEU1
wr %g0, FPRS_FEF, %fprs ! LSU Group+4bubbles
- andcc %g5, SPARC_FLAG_USEDFPU, %g0 ! IEU1 Group
- or %g3, %lo(FPDIS_OFF), %g2 ! IEU0
- sethi %hi(empty_zero_page), %g1 ! IEU0 Group
- add %g6, %g2, %g2 ! IEU1
- be,a,pn %icc, 1f ! CTI
- clr %g7 ! IEU0 Group
- add %g2, 0x100, %g1 ! IEU1
- ldx [%g2 + 0x108], %g7 ! Load
-1: andcc %g5, SPARC_FLAG_USEDFPUL, %g0 ! IEU1 Group
+ andcc %g5, FPRS_FEF, %g0 ! IEU1 Group
+ be,a,pt %icc, 1f ! CTI
+ clr %g7 ! IEU0
+ ldub [%g6 + AOFF_task_tss + AOFF_thread_gsr], %g7 ! Load Group
+1: andcc %g5, FPRS_DL, %g0 ! IEU1
bne,pn %icc, 2f ! CTI
fzero %f0 ! FPA
- andcc %g5, SPARC_FLAG_USEDFPUU, %g0 ! IEU1 Group
+ andcc %g5, FPRS_DU, %g0 ! IEU1 Group
bne,pn %icc, 1f ! CTI
fzero %f2 ! FPA
faddd %f0, %f2, %f4
@@ -170,17 +77,18 @@ do_fpdis:
b,pt %xcc, fpdis_exit2
faddd %f0, %f2, %f60
1: mov SECONDARY_CONTEXT, %g3
+ add %g6, AOFF_task_fpregs + 0x80, %g1
faddd %f0, %f2, %f4
fmuld %f0, %f2, %f6
ldxa [%g3] ASI_DMMU, %g5
+ add %g6, AOFF_task_fpregs + 0xc0, %g2
stxa %g0, [%g3] ASI_DMMU
faddd %f0, %f2, %f8
fmuld %f0, %f2, %f10
- flush %g2
- wr %g0, ASI_BLK_S, %asi ! grrr, where is ASI_BLK_NUCLEUS 8-(
+ flush %g6
membar #StoreLoad | #LoadLoad
- ldda [%g2 + 0x080] %asi, %f32
- ldda [%g2 + 0x0c0] %asi, %f48
+ ldda [%g1] ASI_BLK_S, %f32 ! grrr, where is ASI_BLK_NUCLEUS 8-(
+ ldda [%g2] ASI_BLK_S, %f48
faddd %f0, %f2, %f12
fmuld %f0, %f2, %f14
faddd %f0, %f2, %f16
@@ -193,20 +101,21 @@ do_fpdis:
fmuld %f0, %f2, %f30
b,pt %xcc, fpdis_exit
membar #Sync
-2: andcc %g5, SPARC_FLAG_USEDFPUU, %g0
+2: andcc %g5, FPRS_DU, %g0
bne,pt %icc, 3f
fzero %f32
mov SECONDARY_CONTEXT, %g3
fzero %f34
ldxa [%g3] ASI_DMMU, %g5
+ add %g6, AOFF_task_fpregs, %g1
stxa %g0, [%g3] ASI_DMMU
+ add %g6, AOFF_task_fpregs + 0x40, %g2
faddd %f32, %f34, %f36
fmuld %f32, %f34, %f38
- flush %g2
- wr %g0, ASI_BLK_S, %asi ! grrr, where is ASI_BLK_NUCLEUS 8-(
+ flush %g6
membar #StoreLoad | #LoadLoad
- ldda [%g2 + 0x000] %asi, %f0
- ldda [%g2 + 0x040] %asi, %f16
+ ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
+ ldda [%g2] ASI_BLK_S, %f16
faddd %f32, %f34, %f40
fmuld %f32, %f34, %f42
faddd %f32, %f34, %f44
@@ -222,22 +131,24 @@ do_fpdis:
b,pt %xcc, fpdis_exit
membar #Sync
3: mov SECONDARY_CONTEXT, %g3
+ add %g6, AOFF_task_fpregs, %g1
ldxa [%g3] ASI_DMMU, %g5
+ mov 0x40, %g2
stxa %g0, [%g3] ASI_DMMU
- flush %g2
- wr %g0, ASI_BLK_S, %asi ! grrr, where is ASI_BLK_NUCLEUS 8-(
+ flush %g6
membar #StoreLoad | #LoadLoad
- ldda [%g2 + 0x000] %asi, %f0
- ldda [%g2 + 0x040] %asi, %f16
- ldda [%g2 + 0x080] %asi, %f32
- ldda [%g2 + 0x0c0] %asi, %f48
+ ldda [%g1] ASI_BLK_S, %f0 ! grrr, where is ASI_BLK_NUCLEUS 8-(
+ ldda [%g1 + %g2] ASI_BLK_S, %f16
+ add %g1, 0x80, %g1
+ ldda [%g1] ASI_BLK_S, %f32
+ ldda [%g1 + %g2] ASI_BLK_S, %f48
membar #Sync
fpdis_exit:
stxa %g5, [%g3] ASI_DMMU
- flush %g2
+ flush %g6
fpdis_exit2:
wr %g7, 0, %gsr
- ldx [%g1], %fsr
+ ldx [%g6 + AOFF_task_tss + AOFF_thread_xfsr], %fsr
rdpr %tstate, %g3
or %g3, %g4, %g3 ! anal...
wrpr %g3, %tstate
@@ -300,8 +211,10 @@ do_ivec_xcall:
add %g2, 0x10, %g2
ldxa [%g2] ASI_UDB_INTR_R, %g7
stxa %g0, [%g0] ASI_INTR_RECEIVE
+ membar #Sync
jmpl %g3, %g0
- membar #Sync
+ nop
+
do_ivec_spurious:
srl %g3, 3, %g3
sethi %hi(ivec_spurious_cookie), %g2
@@ -588,6 +501,8 @@ sunos_execv:
.globl sys_sigreturn, sys_rt_sigreturn
.globl sys32_sigreturn, sys32_rt_sigreturn
.globl sys32_execve, sys_ptrace
+ .globl sys_sigaltstack, sys32_sigaltstack
+ .globl sys32_sigstack
.align 32
sys_pipe: sethi %hi(sparc_pipe), %g1
add %sp, STACK_BIAS + REGWIN_SZ, %o0
@@ -611,6 +526,19 @@ sys_memory_ordering:
add %sp, STACK_BIAS + REGWIN_SZ, %o1
jmpl %g1 + %lo(sparc_memory_ordering), %g0
nop
+sys_sigaltstack:sethi %hi(do_sigaltstack), %g1
+ add %i6, STACK_BIAS, %o2
+ jmpl %g1 + %lo(do_sigaltstack), %g1
+ nop
+sys32_sigstack: sethi %hi(do_sys32_sigstack), %g1
+ mov %i6, %o2
+ jmpl %g1 + %lo(do_sys32_sigstack), %g1
+ nop
+sys32_sigaltstack:
+ sethi %hi(do_sys32_sigaltstack), %g1
+ mov %i6, %o2
+ jmpl %g1 + %lo(do_sys32_sigaltstack), %g1
+ nop
.align 32
sys_sigsuspend: add %sp, STACK_BIAS + REGWIN_SZ, %o0
@@ -666,7 +594,7 @@ sys_ptrace: add %sp, STACK_BIAS + REGWIN_SZ, %o0
ba,pt %xcc, rtrap
clr %l6
- /* This is how fork() was meant to be done, 12 instruction entry.
+ /* This is how fork() was meant to be done, 8 instruction entry.
*
* I questioned the following code briefly, let me clear things
* up so you must not reason on it like I did.
@@ -689,26 +617,43 @@ sys_ptrace: add %sp, STACK_BIAS + REGWIN_SZ, %o0
* In fact we should take advantage of that fact for other things
* during system calls...
*/
- .globl sys_fork, sys_vfork, sys_clone
- .globl ret_from_syscall, ret_from_smpfork
+ .globl sys_fork, sys_vfork, sys_clone, sparc_exit
+ .globl ret_from_syscall
.align 32
sys_fork:
sys_vfork: mov SIGCHLD, %o0
clr %o1
-sys_clone: mov %o7, %l5
+sys_clone: flushw
+ mov %o7, %l5
add %sp, STACK_BIAS + REGWIN_SZ, %o2
movrz %o1, %fp, %o1
call do_fork
mov %l5, %o7
+ret_from_syscall:
+ /* Clear SPARC_FLAG_NEWCHILD, switch_to leaves tss.flags in
+ * %o7 for us.
+ */
+ andn %o7, 0x100, %o7
+ sth %o7, [%g6 + AOFF_task_tss + AOFF_thread_flags]
#ifdef __SMP__
-ret_from_smpfork:
sethi %hi(scheduler_lock), %o4
membar #StoreStore | #LoadStore
stb %g0, [%o4 + %lo(scheduler_lock)]
#endif
-ret_from_syscall:
b,pt %xcc, ret_sys_call
ldx [%sp + STACK_BIAS + REGWIN_SZ + PT_V9_I0], %o0
+sparc_exit: rdpr %otherwin, %g1
+ rdpr %pstate, %g2
+ wrpr %g2, PSTATE_IE, %pstate
+ rdpr %cansave, %g3
+ add %g3, %g1, %g3
+ wrpr %g3, 0x0, %cansave
+ wrpr %g0, 0x0, %otherwin
+ wrpr %g2, 0x0, %pstate
+ mov %o7, %l5
+ sth %g0, [%g6 + AOFF_task_tss + AOFF_thread_w_saved]
+ call sys_exit
+ mov %l5, %o7
linux_sparc_ni_syscall:
sethi %hi(sys_ni_syscall), %l7
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