mirror of https://github.com/acidanthera/audk.git
103 lines
3.3 KiB
ArmAsm
103 lines
3.3 KiB
ArmAsm
/// @file
|
|
/// IPF specific control register reading functions
|
|
///
|
|
/// Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
|
|
/// This program and the accompanying materials
|
|
/// are licensed and made available under the terms and conditions of the BSD License
|
|
/// which accompanies this distribution. The full text of the license may be found at
|
|
/// http://opensource.org/licenses/bsd-license.php.
|
|
///
|
|
/// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
///
|
|
///
|
|
///
|
|
|
|
|
|
|
|
//---------------------------------------------------------------------------------
|
|
//++
|
|
// AsmReadControlRegister
|
|
//
|
|
// Reads a 64-bit control register.
|
|
//
|
|
// Reads and returns the control register specified by Index.
|
|
// If Index is invalid then 0xFFFFFFFFFFFFFFFF is returned. This function is only available on IPF.
|
|
//
|
|
// Arguments :
|
|
//
|
|
// On Entry : The index of the control register to read.
|
|
//
|
|
// Return Value: The control register specified by Index.
|
|
//
|
|
//--
|
|
//----------------------------------------------------------------------------------
|
|
.text
|
|
.type AsmReadControlRegister, @function
|
|
.proc AsmReadControlRegister
|
|
.regstk 1, 0, 0, 0
|
|
|
|
AsmReadControlRegister::
|
|
//
|
|
// CRs are defined in the ranges 0-25 and 64-81 (with some holes).
|
|
// Compact this list by subtracting 32 from the top range.
|
|
// 0-25, 64-81 -> 0-25, 32-49
|
|
//
|
|
mov r15=2
|
|
mov r14=pr // save predicates
|
|
cmp.leu p6,p7=64,in0 // p6 = CR# >= 64
|
|
;;
|
|
(p7) cmp.leu p7,p0=32,in0 // p7 = 32 <= CR# < 64
|
|
(p6) add in0=-32,in0 // if (CR >= 64) CR# -= 32
|
|
;;
|
|
(p7) mov r15=0 // if bad range (32-63)
|
|
;;
|
|
mov ret0=-1 // in case of illegal CR #
|
|
shl r15=r15,in0 // r15 = 0x2 << CR#
|
|
;;
|
|
mov pr=r15,-1
|
|
;;
|
|
|
|
//
|
|
// At this point the predicates contain a bit field of the
|
|
// CR desired. (The bit is the CR+1, since pr0 is always 1.)
|
|
//
|
|
.pred.rel "mutex",p1,p2,p3,p9,p17,p18,p20,p21,p22,p23,p24,p25,p26,\
|
|
p33,p34,p35,p36,p37,p38,p39,p40,p41,p42,p43,p49,p50
|
|
(p1) mov ret0=cr.dcr // cr0
|
|
(p2) mov ret0=cr.itm // cr1
|
|
(p3) mov ret0=cr.iva // cr2
|
|
(p9) mov ret0=cr.pta // cr8
|
|
(p17) mov ret0=cr.ipsr // cr16
|
|
(p18) mov ret0=cr.isr // cr17
|
|
(p20) mov ret0=cr.iip // cr19
|
|
(p21) mov ret0=cr.ifa // cr20
|
|
(p22) mov ret0=cr.itir // cr21
|
|
(p23) mov ret0=cr.iipa // cr22
|
|
(p24) mov ret0=cr.ifs // cr23
|
|
(p25) mov ret0=cr.iim // cr24
|
|
(p26) mov ret0=cr.iha // cr25
|
|
|
|
// This is the translated (-32) range.
|
|
|
|
(p33) mov ret0=cr.lid // cr64
|
|
(p34) mov ret0=cr.ivr // cr65
|
|
(p35) mov ret0=cr.tpr // cr66
|
|
(p36) mov ret0=cr.eoi // cr67
|
|
(p37) mov ret0=cr.irr0 // cr68
|
|
(p38) mov ret0=cr.irr1 // cr69
|
|
(p39) mov ret0=cr.irr2 // cr70
|
|
(p40) mov ret0=cr.irr3 // cr71
|
|
(p41) mov ret0=cr.itv // cr72
|
|
(p42) mov ret0=cr.pmv // cr73
|
|
(p43) mov ret0=cr.cmcv // cr74
|
|
(p49) mov ret0=cr.lrr0 // cr80
|
|
(p50) mov ret0=cr.lrr1 // cr81
|
|
|
|
//
|
|
// Restore predicates and return.
|
|
//
|
|
mov pr=r14,-1
|
|
br.ret.sptk b0
|
|
.endp
|