lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[SPARC64]: Add initial code to twiddle %gl on trap entry/exit.

Browse Source 
Instead of setting/clearing PSTATE_AG we have to change
the %gl register value on sun4v.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-05 21:29:28 -08:00
parent 6e02493a7f
commit 936f482af1
6 changed files with 62 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
arch/sparc64/kernel/rtrap.S
View File

@@ -230,7 +230,14 @@ rt_continue: ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1
1:
ldx [%sp + PTREGS_OFF + PT_V9_G6], %g6
ldx [%sp + PTREGS_OFF + PT_V9_G7], %g7
wrpr %g0, RTRAP_PSTATE_AG_IRQOFF, %pstate
/* Normal globals are restored, go to trap globals. */
661: wrpr %g0, RTRAP_PSTATE_AG_IRQOFF, %pstate
.section .gl_1insn_patch, "ax"
.word 661b
SET_GL(1)
.previous
ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0
ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1
@@ -304,6 +311,13 @@ user_rtt_fill_fixup:
mov %g6, %l1
wrpr %g0, 0x0, %tl
wrpr %g0, RTRAP_PSTATE, %pstate
661: nop
.section .gl_1insn_patch, "ax"
.word 661b
SET_GL(0)
.previous
mov %l1, %g6
ldx [%g6 + TI_TASK], %g4
LOAD_PER_CPU_BASE(%g5, %g6, %g1, %g2, %g3)