svn commit: r203554 - stable/8/sys/sparc64/sparc64
Marius Strobl
marius at FreeBSD.org
Sat Feb 6 17:33:40 UTC 2010
Author: marius
Date: Sat Feb 6 17:33:39 2010
New Revision: 203554
URL: http://svn.freebsd.org/changeset/base/203554
Log:
MFC: r203185
Implement handling of the third argument of cpu_switch().
PR: 143215
Modified:
stable/8/sys/sparc64/sparc64/genassym.c
stable/8/sys/sparc64/sparc64/swtch.S
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
stable/8/sys/dev/xen/xenpci/ (props changed)
Modified: stable/8/sys/sparc64/sparc64/genassym.c
==============================================================================
--- stable/8/sys/sparc64/sparc64/genassym.c Sat Feb 6 17:02:33 2010 (r203553)
+++ stable/8/sys/sparc64/sparc64/genassym.c Sat Feb 6 17:33:39 2010 (r203554)
@@ -239,6 +239,7 @@ ASSYM(P_VMSPACE, offsetof(struct proc, p
ASSYM(TD_FLAGS, offsetof(struct thread, td_flags));
ASSYM(TD_FRAME, offsetof(struct thread, td_frame));
ASSYM(TD_KSTACK, offsetof(struct thread, td_kstack));
+ASSYM(TD_LOCK, offsetof(struct thread, td_lock));
ASSYM(TD_PCB, offsetof(struct thread, td_pcb));
ASSYM(TD_PROC, offsetof(struct thread, td_proc));
ASSYM(TD_MD, offsetof(struct thread, td_md));
Modified: stable/8/sys/sparc64/sparc64/swtch.S
==============================================================================
--- stable/8/sys/sparc64/sparc64/swtch.S Sat Feb 6 17:02:33 2010 (r203553)
+++ stable/8/sys/sparc64/sparc64/swtch.S Sat Feb 6 17:33:39 2010 (r203554)
@@ -46,15 +46,14 @@ ENTRY(cpu_throw)
save %sp, -CCFSZ, %sp
flushw
ba %xcc, .Lsw1
- mov %i1, %i0
+ mov %g0, %i2
END(cpu_throw)
/*
- * void cpu_switch(struct thread *old, struct thread *new)
+ * void cpu_switch(struct thread *old, struct thread *new, struct mtx *mtx)
*/
ENTRY(cpu_switch)
save %sp, -CCFSZ, %sp
- mov %i1, %i0
/*
* If the current thread was using floating point in the kernel, save
@@ -63,7 +62,7 @@ ENTRY(cpu_switch)
*/
rd %fprs, %l2
andcc %l2, FPRS_FEF, %g0
- bz,a,pt %xcc, 1f
+ bz,a,pt %xcc, 1f
nop
call savefpctx
add PCB_REG, PCB_KFP, %o0
@@ -104,24 +103,24 @@ ENTRY(cpu_switch)
.Lsw1:
#if KTR_COMPILE & KTR_PROC
CATR(KTR_PROC, "cpu_switch: new td=%p pc=%#lx fp=%#lx"
- , %g1, %g2, %g3, 7, 8, 9)
- stx %i0, [%g1 + KTR_PARM1]
- ldx [%i0 + TD_PCB], %g2
+ , %g1, %g2, %g3, 8, 9, 10)
+ stx %i1, [%g1 + KTR_PARM1]
+ ldx [%i1 + TD_PCB], %g2
ldx [%g2 + PCB_PC], %g3
stx %g3, [%g1 + KTR_PARM2]
ldx [%g2 + PCB_SP], %g3
stx %g3, [%g1 + KTR_PARM3]
-9:
+10:
#endif
- ldx [%i0 + TD_PCB], %i1
+ ldx [%i1 + TD_PCB], %l0
- stx %i0, [PCPU(CURTHREAD)]
- stx %i1, [PCPU(CURPCB)]
+ stx %i1, [PCPU(CURTHREAD)]
+ stx %l0, [PCPU(CURPCB)]
wrpr %g0, PSTATE_NORMAL, %pstate
- mov %i1, PCB_REG
+ mov %l0, PCB_REG
wrpr %g0, PSTATE_ALT, %pstate
- mov %i1, PCB_REG
+ mov %l0, PCB_REG
wrpr %g0, PSTATE_KERNEL, %pstate
ldx [PCB_REG + PCB_SP], %fp
@@ -132,24 +131,24 @@ ENTRY(cpu_switch)
* Point to the pmaps of the new process, and of the last non-kernel
* process to run.
*/
- ldx [%i0 + TD_PROC], %i2
+ ldx [%i1 + TD_PROC], %l1
ldx [PCPU(PMAP)], %l2
- ldx [%i2 + P_VMSPACE], %i5
- add %i5, VM_PMAP, %i2
+ ldx [%l1 + P_VMSPACE], %i5
+ add %i5, VM_PMAP, %l1
#if KTR_COMPILE & KTR_PROC
CATR(KTR_PROC, "cpu_switch: new pmap=%p old pmap=%p"
- , %g1, %g2, %g3, 7, 8, 9)
- stx %i2, [%g1 + KTR_PARM1]
+ , %g1, %g2, %g3, 8, 9, 10)
+ stx %l1, [%g1 + KTR_PARM1]
stx %l2, [%g1 + KTR_PARM2]
-9:
+10:
#endif
/*
* If they are the same we are done.
*/
- cmp %l2, %i2
- be,a,pn %xcc, 5f
+ cmp %l2, %l1
+ be,a,pn %xcc, 7f
nop
/*
@@ -158,21 +157,20 @@ ENTRY(cpu_switch)
*/
SET(vmspace0, %i4, %i3)
cmp %i5, %i3
- be,a,pn %xcc, 5f
+ be,a,pn %xcc, 7f
nop
/*
* If there was no non-kernel pmap, don't try to deactivate it.
*/
- brz,a,pn %l2, 3f
- nop
+ brz,pn %l2, 3f
+ lduw [PCPU(CPUMASK)], %l4
/*
* Mark the pmap of the last non-kernel vmspace to run as no longer
* active on this CPU.
*/
lduw [%l2 + PM_ACTIVE], %l3
- lduw [PCPU(CPUMASK)], %l4
andn %l3, %l4, %l3
stw %l3, [%l2 + PM_ACTIVE]
@@ -185,25 +183,28 @@ ENTRY(cpu_switch)
mov -1, %l5
stw %l5, [%l3 + %l4]
+3: cmp %i2, %g0
+ be,pn %xcc, 4f
+ lduw [PCPU(TLB_CTX_MAX)], %i4
+ stx %i2, [%i0 + TD_LOCK]
+
/*
* Find a new TLB context. If we've run out we have to flush all
* user mappings from the TLB and reset the context numbers.
*/
-3: lduw [PCPU(TLB_CTX)], %i3
- lduw [PCPU(TLB_CTX_MAX)], %i4
+4: lduw [PCPU(TLB_CTX)], %i3
cmp %i3, %i4
- bne,a,pt %xcc, 4f
+ bne,a,pt %xcc, 5f
nop
SET(tlb_flush_user, %i5, %i4)
ldx [%i4], %i5
call %i5
- nop
- lduw [PCPU(TLB_CTX_MIN)], %i3
+ lduw [PCPU(TLB_CTX_MIN)], %i3
/*
* Advance next free context.
*/
-4: add %i3, 1, %i4
+5: add %i3, 1, %i4
stw %i4, [PCPU(TLB_CTX)]
/*
@@ -211,36 +212,36 @@ ENTRY(cpu_switch)
*/
lduw [PCPU(CPUID)], %i4
sllx %i4, INT_SHIFT, %i4
- add %i2, PM_CONTEXT, %i5
+ add %l1, PM_CONTEXT, %i5
stw %i3, [%i4 + %i5]
/*
* Mark the pmap as active on this CPU.
*/
- lduw [%i2 + PM_ACTIVE], %i4
+ lduw [%l1 + PM_ACTIVE], %i4
lduw [PCPU(CPUMASK)], %i5
or %i4, %i5, %i4
- stw %i4, [%i2 + PM_ACTIVE]
+ stw %i4, [%l1 + PM_ACTIVE]
/*
* Make note of the change in pmap.
*/
- stx %i2, [PCPU(PMAP)]
+ stx %l1, [PCPU(PMAP)]
/*
* Fiddle the hardware bits. Set the TSB registers and install the
* new context number in the CPU.
*/
- ldx [%i2 + PM_TSB], %i4
+ ldx [%l1 + PM_TSB], %i4
mov AA_DMMU_TSB, %i5
stxa %i4, [%i5] ASI_DMMU
mov AA_IMMU_TSB, %i5
stxa %i4, [%i5] ASI_IMMU
setx TLB_PCXR_PGSZ_MASK, %i5, %i4
mov AA_DMMU_PCXR, %i5
- ldxa [%i5] ASI_DMMU, %i2
- and %i2, %i4, %i2
- or %i3, %i2, %i3
+ ldxa [%i5] ASI_DMMU, %l1
+ and %l1, %i4, %l1
+ or %i3, %l1, %i3
sethi %hi(KERNBASE), %i4
stxa %i3, [%i5] ASI_DMMU
flush %i4
@@ -248,7 +249,15 @@ ENTRY(cpu_switch)
/*
* Done, return and load the new process's window from the stack.
*/
-5: ret
+
+6: ret
+ restore
+
+7: cmp %i2, %g0
+ be,a,pn %xcc, 6b
+ nop
+ stx %i2, [%i0 + TD_LOCK]
+ ret
restore
END(cpu_switch)
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