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//------------------------------------------------------------------------------
//
// Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
// Copyright (c) 2011-2012, ARM Limited. All rights reserved.
//
// 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.
//
//------------------------------------------------------------------------------
#include <AsmMacroIoLib.h>
INCLUDE AsmMacroIoLib.inc
#ifdef ARM_CPU_ARMv6
// No memory barriers for ARMv6
#define isb
#define dsb
#endif
EXPORT Cp15IdCode
EXPORT Cp15CacheInfo
EXPORT ArmGetInterruptState
EXPORT ArmGetFiqState
EXPORT ArmGetTTBR0BaseAddress
EXPORT ArmSetTTBR0
EXPORT ArmSetDomainAccessControl
EXPORT CPSRMaskInsert
EXPORT CPSRRead
EXPORT ArmReadCpacr
EXPORT ArmWriteCpacr
EXPORT ArmWriteAuxCr
EXPORT ArmReadAuxCr
EXPORT ArmInvalidateTlb
EXPORT ArmUpdateTranslationTableEntry
EXPORT ArmReadNsacr
EXPORT ArmWriteNsacr
EXPORT ArmReadScr
EXPORT ArmWriteScr
EXPORT ArmReadMVBar
EXPORT ArmWriteMVBar
EXPORT ArmCallWFE
EXPORT ArmCallSEV
EXPORT ArmReadSctlr
AREA ArmLibSupport, CODE, READONLY
Cp15IdCode
mrc p15,0,R0,c0,c0,0
bx LR
Cp15CacheInfo
mrc p15,0,R0,c0,c0,1
bx LR
ArmGetInterruptState
mrs R0,CPSR
tst R0,#0x80 // Check if IRQ is enabled.
moveq R0,#1
movne R0,#0
bx LR
ArmGetFiqState
mrs R0,CPSR
tst R0,#0x40 // Check if FIQ is enabled.
moveq R0,#1
movne R0,#0
bx LR
ArmSetDomainAccessControl
mcr p15,0,r0,c3,c0,0
bx lr
CPSRMaskInsert // on entry, r0 is the mask and r1 is the field to insert
stmfd sp!, {r4-r12, lr} // save all the banked registers
mov r3, sp // copy the stack pointer into a non-banked register
mrs r2, cpsr // read the cpsr
bic r2, r2, r0 // clear mask in the cpsr
and r1, r1, r0 // clear bits outside the mask in the input
orr r2, r2, r1 // set field
msr cpsr_cxsf, r2 // write back cpsr (may have caused a mode switch)
isb
mov sp, r3 // restore stack pointer
ldmfd sp!, {r4-r12, lr} // restore registers
bx lr // return (hopefully thumb-safe!) // return (hopefully thumb-safe!)
CPSRRead
mrs r0, cpsr
bx lr
ArmReadCpacr
mrc p15, 0, r0, c1, c0, 2
bx lr
ArmWriteCpacr
mcr p15, 0, r0, c1, c0, 2
isb
bx lr
ArmWriteAuxCr
mcr p15, 0, r0, c1, c0, 1
bx lr
ArmReadAuxCr
mrc p15, 0, r0, c1, c0, 1
bx lr
ArmSetTTBR0
mcr p15,0,r0,c2,c0,0
isb
bx lr
ArmGetTTBR0BaseAddress
mrc p15,0,r0,c2,c0,0
LoadConstantToReg(0xFFFFC000, r1)
and r0, r0, r1
isb
bx lr
//
//VOID
//ArmUpdateTranslationTableEntry (
// IN VOID *TranslationTableEntry // R0
// IN VOID *MVA // R1
// );
ArmUpdateTranslationTableEntry
mcr p15,0,R0,c7,c14,1 // DCCIMVAC Clean data cache by MVA
dsb
mcr p15,0,R1,c8,c7,1 // TLBIMVA TLB Invalidate MVA
mcr p15,0,R9,c7,c5,6 // BPIALL Invalidate Branch predictor array. R9 == NoOp
dsb
isb
bx lr
ArmInvalidateTlb
mov r0,#0
mcr p15,0,r0,c8,c7,0
mcr p15,0,R9,c7,c5,6 // BPIALL Invalidate Branch predictor array. R9 == NoOp
dsb
isb
bx lr
ArmReadNsacr
mrc p15, 0, r0, c1, c1, 2
bx lr
ArmWriteNsacr
mcr p15, 0, r0, c1, c1, 2
bx lr
ArmReadScr
mrc p15, 0, r0, c1, c1, 0
bx lr
ArmWriteScr
mcr p15, 0, r0, c1, c1, 0
bx lr
ArmReadMVBar
mrc p15, 0, r0, c12, c0, 1
bx lr
ArmWriteMVBar
mcr p15, 0, r0, c12, c0, 1
bx lr
ArmCallWFE
wfe
blx lr
ArmCallSEV
sev
blx lr
ArmReadSctlr
mrc p15, 0, R0, c1, c0, 0 // Read SCTLR into R0 (Read control register configuration data)
bx lr
END
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