sravan/system76-edk2
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1. Updated CpuFlushTlb() according to IA-64 programmer's guide

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2. Updated Thunk code to preserve EFLAGS/RFLAGS across real mode code invocation
3. Updated comments in x86Thunk.c

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@248 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bxing
2006-05-24 05:33:03 +00:00
parent 4df60ea54f
commit 18c319ae39
6 changed files with 100 additions and 5 deletions
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38
MdePkg/Library/BaseLib/Ipf/CpuFlushTlb.s
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@@ -17,13 +17,41 @@
.auto
.text
.global PalCallStatic
.type PalCallStatic, @function
.proc CpuFlushTlb
.type CpuFlushTlb, @function
CpuFlushTlb::
mov r8 = ip
mov r9 = -1
dep.z r10 = -1, 61, 3
and r8 = r8, r10
ptc.l r8, r9
alloc loc0 = ar.pfs, 0, 2, 5, 0
mov out0 = 0
mov out1 = 6
mov out2 = 0
mov out3 = 0
mov out4 = 0
mov loc1 = b0
br.call.sptk b0 = PalCallStatic
rsm 1 << 14 // Disable interrupts
mov ar.pfs = loc0
extr.u r14 = r10, 32, 32 // r14 <- count1
extr.u r15 = r11, 32, 32 // r15 <- stride1
extr.u r10 = r10, 0, 32 // r10 <- count2
mov loc0 = psr
extr.u r11 = r11, 0, 32 // r11 <- stride2
br.cond.sptk LoopPredicate
LoopOuter:
mov ar.lc = r10 // LC <- count2
mov ar.ec = r0 // EC <- 0
Loop:
ptc.e r9
add r9 = r11, r9 // r9 += stride2
br.ctop.sptk Loop
add r9 = r15, r9 // r9 += stride1
LoopPredicate:
cmp.ne p6, p7 = r0, r14 // count1 == 0?
add r14 = -1, r14
(p6) br.cond.sptk LoopOuter
mov psr.l = loc0
mov b0 = loc1
br.ret.sptk.many b0
.endp