diff options
| author | Jack Steiner <steiner@sgi.com> | 2005-08-11 10:28:00 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-08-17 15:32:24 -0700 |
| commit | 470ceb05d9a2b4d61c19fac615a79e56e8401565 (patch) | |
| tree | eb9e2b0b971bbe287dd4bef0b46c7307e3258bf0 /arch/ia64/sn/kernel/sn2/ptc_deadlock.S | |
| parent | 68b9753f47953930cb94de0223c163f289399091 (diff) | |
[IA64-SGI] - New SN hardware support - ptc_fixes
Shub2 provides a much improved mechanism for issuing internode
TLB purges. Add code to support the newer mechanism. There is also
some debug code (disabled) that is useful for testing.
Collect statistics on the number, type & duration of TLB purges.
This data will be useful for making future improvements in the algorithms.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/sn/kernel/sn2/ptc_deadlock.S')
| -rw-r--r-- | arch/ia64/sn/kernel/sn2/ptc_deadlock.S | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/ia64/sn/kernel/sn2/ptc_deadlock.S b/arch/ia64/sn/kernel/sn2/ptc_deadlock.S index 96cb71d1568..3fa95065a44 100644 --- a/arch/ia64/sn/kernel/sn2/ptc_deadlock.S +++ b/arch/ia64/sn/kernel/sn2/ptc_deadlock.S @@ -3,7 +3,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved. + * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved. */ #include <asm/types.h> @@ -11,7 +11,7 @@ #define DEADLOCKBIT SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_SHFT #define WRITECOUNTMASK SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK -#define ALIAS_OFFSET (SH1_PIO_WRITE_STATUS_0_ALIAS-SH1_PIO_WRITE_STATUS_0) +#define ALIAS_OFFSET 8 .global sn2_ptc_deadlock_recovery_core @@ -36,13 +36,15 @@ sn2_ptc_deadlock_recovery_core: extr.u piowcphy=piowc,0,61;; // Convert piowc to uncached physical address dep piowcphy=-1,piowcphy,63,1 movl mask=WRITECOUNTMASK + mov r8=r0 1: add scr2=ALIAS_OFFSET,piowc // Address of WRITE_STATUS alias register - mov scr1=7;; // Clear DEADLOCK, WRITE_ERROR, MULTI_WRITE_ERROR - st8.rel [scr2]=scr1;; + ;; + ld8.acq scr1=[scr2];; 5: ld8.acq scr1=[piowc];; // Wait for PIOs to complete. + hint @pause and scr2=scr1,mask;; // mask of writecount bits cmp.ne p6,p0=zeroval,scr2 (p6) br.cond.sptk 5b @@ -57,6 +59,7 @@ sn2_ptc_deadlock_recovery_core: st8.rel [ptc0]=data0 // Write PTC0 & wait for completion. 5: ld8.acq scr1=[piowcphy];; // Wait for PIOs to complete. + hint @pause and scr2=scr1,mask;; // mask of writecount bits cmp.ne p6,p0=zeroval,scr2 (p6) br.cond.sptk 5b;; @@ -67,6 +70,7 @@ sn2_ptc_deadlock_recovery_core: (p7) st8.rel [ptc1]=data1;; // Now write PTC1. 5: ld8.acq scr1=[piowcphy];; // Wait for PIOs to complete. + hint @pause and scr2=scr1,mask;; // mask of writecount bits cmp.ne p6,p0=zeroval,scr2 (p6) br.cond.sptk 5b @@ -77,6 +81,7 @@ sn2_ptc_deadlock_recovery_core: srlz.i;; ////////////// END PHYSICAL MODE //////////////////// +(p8) add r8=1,r8 (p8) br.cond.spnt 1b;; // Repeat if DEADLOCK occurred. br.ret.sptk rp |