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| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/sparc/kernel/helpers.S | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/sparc/kernel/helpers.S')
| -rw-r--r-- | kernel/arch/sparc/kernel/helpers.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/kernel/arch/sparc/kernel/helpers.S b/kernel/arch/sparc/kernel/helpers.S new file mode 100644 index 000000000..314dd0c9f --- /dev/null +++ b/kernel/arch/sparc/kernel/helpers.S @@ -0,0 +1,63 @@ + .align 32 + .globl __flushw_user + .type __flushw_user,#function +__flushw_user: + rdpr %otherwin, %g1 + brz,pn %g1, 2f + clr %g2 +1: save %sp, -128, %sp + rdpr %otherwin, %g1 + brnz,pt %g1, 1b + add %g2, 1, %g2 +1: sub %g2, 1, %g2 + brnz,pt %g2, 1b + restore %g0, %g0, %g0 +2: retl + nop + .size __flushw_user,.-__flushw_user + + /* Flush %fp and %i7 to the stack for all register + * windows active inside of the cpu. This allows + * show_stack_trace() to avoid using an expensive + * 'flushw'. + */ + .globl stack_trace_flush + .type stack_trace_flush,#function +stack_trace_flush: + rdpr %pstate, %o0 + wrpr %o0, PSTATE_IE, %pstate + + rdpr %cwp, %g1 + rdpr %canrestore, %g2 + sub %g1, 1, %g3 + +1: brz,pn %g2, 2f + sub %g2, 1, %g2 + wrpr %g3, %cwp + stx %fp, [%sp + STACK_BIAS + RW_V9_I6] + stx %i7, [%sp + STACK_BIAS + RW_V9_I7] + ba,pt %xcc, 1b + sub %g3, 1, %g3 + +2: wrpr %g1, %cwp + wrpr %o0, %pstate + + retl + nop + .size stack_trace_flush,.-stack_trace_flush + +#ifdef CONFIG_SMP + .globl hard_smp_processor_id + .type hard_smp_processor_id,#function +hard_smp_processor_id: +#endif + .globl real_hard_smp_processor_id + .type real_hard_smp_processor_id,#function +real_hard_smp_processor_id: + __GET_CPUID(%o0) + retl + nop +#ifdef CONFIG_SMP + .size hard_smp_processor_id,.-hard_smp_processor_id +#endif + .size real_hard_smp_processor_id,.-real_hard_smp_processor_id |