ArmPkg/Library/ArmLib/Common/Arm/ArmLibSupport.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4 // Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
   5 //
   6 // This program and the accompanying materials
   7 // are licensed and made available under the terms and conditions of the BSD License
   8 // which accompanies this distribution.  The full text of the license may be found at
   9 // http://opensource.org/licenses/bsd-license.php
  10 //
  11 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 //
  14 //------------------------------------------------------------------------------
  15
  16 #include <AsmMacroIoLib.h>
  17
  18     INCLUDE AsmMacroIoLib.inc
  19
  20
  21     INCLUDE AsmMacroExport.inc
  22
  23  RVCT_ASM_EXPORT ArmReadMidr
  24   mrc     p15,0,R0,c0,c0,0
  25   bx      LR
  26
  27  RVCT_ASM_EXPORT ArmCacheInfo
  28   mrc     p15,0,R0,c0,c0,1
  29   bx      LR
  30
  31  RVCT_ASM_EXPORT ArmGetInterruptState
  32   mrs     R0,CPSR
  33   tst     R0,#0x80      // Check if IRQ is enabled.
  34   moveq   R0,#1
  35   movne   R0,#0
  36   bx      LR
  37
  38  RVCT_ASM_EXPORT ArmGetFiqState
  39   mrs     R0,CPSR
  40   tst     R0,#0x40      // Check if FIQ is enabled.
  41   moveq   R0,#1
  42   movne   R0,#0
  43   bx      LR
  44
  45  RVCT_ASM_EXPORT ArmSetDomainAccessControl
  46   mcr     p15,0,r0,c3,c0,0
  47   bx      lr
  48
  49  RVCT_ASM_EXPORT CPSRMaskInsert
  50   stmfd   sp!, {r4-r12, lr} // save all the banked registers
  51   mov     r3, sp            // copy the stack pointer into a non-banked register
  52   mrs     r2, cpsr          // read the cpsr
  53   bic     r2, r2, r0        // clear mask in the cpsr
  54   and     r1, r1, r0        // clear bits outside the mask in the input
  55   orr     r2, r2, r1        // set field
  56   msr     cpsr_cxsf, r2     // write back cpsr (may have caused a mode switch)
  57   isb
  58   mov     sp, r3            // restore stack pointer
  59   ldmfd   sp!, {r4-r12, lr} // restore registers
  60   bx      lr                // return (hopefully thumb-safe!)             // return (hopefully thumb-safe!)
  61
  62  RVCT_ASM_EXPORT CPSRRead
  63   mrs     r0, cpsr
  64   bx      lr
  65
  66  RVCT_ASM_EXPORT ArmReadCpacr
  67   mrc     p15, 0, r0, c1, c0, 2
  68   bx      lr
  69
  70  RVCT_ASM_EXPORT ArmWriteCpacr
  71   mcr     p15, 0, r0, c1, c0, 2
  72   isb
  73   bx      lr
  74
  75  RVCT_ASM_EXPORT ArmWriteAuxCr
  76   mcr     p15, 0, r0, c1, c0, 1
  77   bx      lr
  78
  79  RVCT_ASM_EXPORT ArmReadAuxCr
  80   mrc     p15, 0, r0, c1, c0, 1
  81   bx      lr
  82
  83  RVCT_ASM_EXPORT ArmSetTTBR0
  84   mcr     p15,0,r0,c2,c0,0
  85   isb
  86   bx      lr
  87
  88  RVCT_ASM_EXPORT ArmGetTTBR0BaseAddress
  89   mrc     p15,0,r0,c2,c0,0
  90   LoadConstantToReg(0xFFFFC000, r1)
  91   and     r0, r0, r1
  92   isb
  93   bx      lr
  94
  95 //
  96 //VOID
  97 //ArmUpdateTranslationTableEntry (
  98 //  IN VOID  *TranslationTableEntry  // R0
  99 //  IN VOID  *MVA                    // R1
 100 //  );
 101  RVCT_ASM_EXPORT ArmUpdateTranslationTableEntry
 102   mcr     p15,0,R0,c7,c14,1     // DCCIMVAC Clean data cache by MVA
 103   dsb
 104   mcr     p15,0,R1,c8,c7,1      // TLBIMVA TLB Invalidate MVA
 105   mcr     p15,0,R9,c7,c5,6      // BPIALL Invalidate Branch predictor array. R9 == NoOp
 106   dsb
 107   isb
 108   bx      lr
 109
 110  RVCT_ASM_EXPORT ArmInvalidateTlb
 111   mov     r0,#0
 112   mcr     p15,0,r0,c8,c7,0
 113   mcr     p15,0,R9,c7,c5,6      // BPIALL Invalidate Branch predictor array. R9 == NoOp
 114   dsb
 115   isb
 116   bx      lr
 117
 118  RVCT_ASM_EXPORT ArmReadScr
 119   mrc     p15, 0, r0, c1, c1, 0
 120   bx      lr
 121
 122  RVCT_ASM_EXPORT ArmWriteScr
 123   mcr     p15, 0, r0, c1, c1, 0
 124   isb
 125   bx      lr
 126
 127  RVCT_ASM_EXPORT ArmReadHVBar
 128   mrc     p15, 4, r0, c12, c0, 0
 129   bx      lr
 130
 131  RVCT_ASM_EXPORT ArmWriteHVBar
 132   mcr     p15, 4, r0, c12, c0, 0
 133   bx      lr
 134
 135  RVCT_ASM_EXPORT ArmReadMVBar
 136   mrc     p15, 0, r0, c12, c0, 1
 137   bx      lr
 138
 139  RVCT_ASM_EXPORT ArmWriteMVBar
 140   mcr     p15, 0, r0, c12, c0, 1
 141   bx      lr
 142
 143  RVCT_ASM_EXPORT ArmCallWFE
 144   wfe
 145   bx      lr
 146
 147  RVCT_ASM_EXPORT ArmCallSEV
 148   sev
 149   bx      lr
 150
 151  RVCT_ASM_EXPORT ArmReadSctlr
 152   mrc     p15, 0, r0, c1, c0, 0      // Read SCTLR into R0 (Read control register configuration data)
 153   bx      lr
 154
 155
 156  RVCT_ASM_EXPORT ArmReadCpuActlr
 157   mrc     p15, 0, r0, c1, c0, 1
 158   bx      lr
 159
 160  RVCT_ASM_EXPORT ArmWriteCpuActlr
 161   mcr     p15, 0, r0, c1, c0, 1
 162   dsb
 163   isb
 164   bx      lr
 165
 166   END