diff options
| author | Joel Sing <jsing@cvs.openbsd.org> | 2010-12-30 14:30:13 +0000 |
|---|---|---|
| committer | Joel Sing <jsing@cvs.openbsd.org> | 2010-12-30 14:30:13 +0000 |
| commit | fbdc0a4d566f770a8922e3787790a8e86b7ffb4c (patch) | |
| tree | 69c97b638b8a731b6bd261462c03b402f103d3c3 /sys | |
| parent | 9406de6e916ef06271a99833196f0f0c096d5bc7 (diff) | |
Prior to loading the FPU context onto the current CPU, check to see if the
FPU context is still present on another CPU. If so, perform an FPU
shootdown and wait for the FPU context to be saved before continuing.
ok kettenis@
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/hppa/hppa/genassym.cf | 4 | ||||
| -rw-r--r-- | sys/arch/hppa/hppa/locore.S | 25 |
2 files changed, 27 insertions, 2 deletions
diff --git a/sys/arch/hppa/hppa/genassym.cf b/sys/arch/hppa/hppa/genassym.cf index 04caaa5196c..a5690d283d5 100644 --- a/sys/arch/hppa/hppa/genassym.cf +++ b/sys/arch/hppa/hppa/genassym.cf @@ -1,4 +1,4 @@ -# $OpenBSD: genassym.cf,v 1.41 2010/07/01 05:33:32 jsing Exp $ +# $OpenBSD: genassym.cf,v 1.42 2010/12/30 14:30:12 jsing Exp $ # # Copyright (c) 1982, 1990, 1993 @@ -164,6 +164,8 @@ member ci_cpl member ci_ipending member ci_trap_save member ci_fpu_state +member ci_ipi +member ci_hpa struct hppa_fpstate member hfp_regs diff --git a/sys/arch/hppa/hppa/locore.S b/sys/arch/hppa/hppa/locore.S index a76b179973d..d4430e2f00b 100644 --- a/sys/arch/hppa/hppa/locore.S +++ b/sys/arch/hppa/hppa/locore.S @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.S,v 1.182 2010/12/21 14:56:23 claudio Exp $ */ +/* $OpenBSD: locore.S,v 1.183 2010/12/30 14:30:12 jsing Exp $ */ /* * Copyright (c) 1998-2004 Michael Shalayeff @@ -1087,6 +1087,29 @@ $fpusw_set sync $fpusw_nosave + +#ifdef MULTIPROCESSOR + /* See if this process has FPU context on another CPU. */ + ldw HFP_CPU(r9), r1 + comb,=,n r1, r0, $fpusw_noshoot + + /* Perform FPU shootdown. */ + ldi (1 << HPPA_IPI_FPU_SAVE), r1 + ldw HFP_CPU(r9), r16 + stw r1, CI_IPI(r16) + ldi 1, r1 + ldw CI_HPA(r16), r16 + stw r1, 0(r16) + +$fpusw_spin + /* Wait for shootdown to complete. */ + sync + ldw HFP_CPU(r9), r1 + comb,<>,n r1, r0, $fpusw_spin + +$fpusw_noshoot +#endif + /* count switches */ .import uvmexp, data ldil L%(uvmexp+FPSWTCH), r1 |