ArmPkg/Library/ArmLib/AArch64/AArch64ArchTimerSupport.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2011 - 2013, ARM Limited. All rights reserved.
   4 #
   5 # This program and the accompanying materials
   6 # are licensed and made available under the terms and conditions of the BSD License
   7 # which accompanies this distribution.  The full text of the license may be found at
   8 # http://opensource.org/licenses/bsd-license.php
   9 #
  10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 #
  13 #------------------------------------------------------------------------------
  14
  15 .text
  16 .align 2
  17
  18 GCC_ASM_EXPORT(ArmReadCntFrq)
  19 GCC_ASM_EXPORT(ArmWriteCntFrq)
  20 GCC_ASM_EXPORT(ArmReadCntPct)
  21 GCC_ASM_EXPORT(ArmReadCntkCtl)
  22 GCC_ASM_EXPORT(ArmWriteCntkCtl)
  23 GCC_ASM_EXPORT(ArmReadCntpTval)
  24 GCC_ASM_EXPORT(ArmWriteCntpTval)
  25 GCC_ASM_EXPORT(ArmReadCntpCtl)
  26 GCC_ASM_EXPORT(ArmWriteCntpCtl)
  27 GCC_ASM_EXPORT(ArmReadCntvTval)
  28 GCC_ASM_EXPORT(ArmWriteCntvTval)
  29 GCC_ASM_EXPORT(ArmReadCntvCtl)
  30 GCC_ASM_EXPORT(ArmWriteCntvCtl)
  31 GCC_ASM_EXPORT(ArmReadCntvCt)
  32 GCC_ASM_EXPORT(ArmReadCntpCval)
  33 GCC_ASM_EXPORT(ArmWriteCntpCval)
  34 GCC_ASM_EXPORT(ArmReadCntvCval)
  35 GCC_ASM_EXPORT(ArmWriteCntvCval)
  36 GCC_ASM_EXPORT(ArmReadCntvOff)
  37 GCC_ASM_EXPORT(ArmWriteCntvOff)
  38
  39 ASM_PFX(ArmReadCntFrq):
  40   mrs   x0, cntfrq_el0           // Read CNTFRQ
  41   ret
  42
  43
  44 # NOTE - Can only write while at highest implemented EL level (EL3 on model). Else ReadOnly (EL2, EL1, EL0)
  45 ASM_PFX(ArmWriteCntFrq):
  46   msr   cntfrq_el0, x0           // Write to CNTFRQ
  47   ret
  48
  49
  50 ASM_PFX(ArmReadCntPct):
  51   mrs   x0, cntpct_el0           // Read CNTPCT (Physical counter register)
  52   ret
  53
  54
  55 ASM_PFX(ArmReadCntkCtl):
  56   mrs   x0, cntkctl_el1          // Read CNTK_CTL (Timer PL1 Control Register)
  57   ret
  58
  59
  60 ASM_PFX(ArmWriteCntkCtl):
  61   mrs   x0, cntkctl_el1          // Write to CNTK_CTL (Timer PL1 Control Register)
  62   ret
  63
  64
  65 ASM_PFX(ArmReadCntpTval):
  66   mrs   x0, cntp_tval_el0        // Read CNTP_TVAL (PL1 physical timer value register)
  67   ret
  68
  69
  70 ASM_PFX(ArmWriteCntpTval):
  71   msr   cntp_tval_el0, x0        // Write to CNTP_TVAL (PL1 physical timer value register)
  72   ret
  73
  74
  75 ASM_PFX(ArmReadCntpCtl):
  76   mrs   x0, cntp_ctl_el0         // Read CNTP_CTL (PL1 Physical Timer Control Register)
  77   ret
  78
  79
  80 ASM_PFX(ArmWriteCntpCtl):
  81   msr   cntp_ctl_el0, x0         // Write to  CNTP_CTL (PL1 Physical Timer Control Register)
  82   ret
  83
  84
  85 ASM_PFX(ArmReadCntvTval):
  86   mrs   x0, cntv_tval_el0        // Read CNTV_TVAL (Virtual Timer Value register)
  87   ret
  88
  89
  90 ASM_PFX(ArmWriteCntvTval):
  91   msr   cntv_tval_el0, x0        // Write to CNTV_TVAL (Virtual Timer Value register)
  92   ret
  93
  94
  95 ASM_PFX(ArmReadCntvCtl):
  96   mrs   x0, cntv_ctl_el0         // Read CNTV_CTL (Virtual Timer Control Register)
  97   ret
  98
  99
 100 ASM_PFX(ArmWriteCntvCtl):
 101   msr   cntv_ctl_el0, x0         // Write to CNTV_CTL (Virtual Timer Control Register)
 102   ret
 103
 104
 105 ASM_PFX(ArmReadCntvCt):
 106   mrs  x0, cntvct_el0            // Read CNTVCT  (Virtual Count Register)
 107   ret
 108
 109
 110 ASM_PFX(ArmReadCntpCval):
 111   mrs   x0, cntp_cval_el0        // Read CNTP_CTVAL (Physical Timer Compare Value Register)
 112   ret
 113
 114
 115 ASM_PFX(ArmWriteCntpCval):
 116   msr   cntp_cval_el0, x0        // Write to CNTP_CTVAL (Physical Timer Compare Value Register)
 117   ret
 118
 119
 120 ASM_PFX(ArmReadCntvCval):
 121   mrs   x0, cntv_cval_el0        // Read CNTV_CTVAL (Virtual Timer Compare Value Register)
 122   ret
 123
 124
 125 ASM_PFX(ArmWriteCntvCval):
 126   msr   cntv_cval_el0, x0        // write to  CNTV_CTVAL (Virtual Timer Compare Value Register)
 127   ret
 128
 129
 130 ASM_PFX(ArmReadCntvOff):
 131   mrs   x0, cntvoff_el2          // Read CNTVOFF (virtual Offset register)
 132   ret
 133
 134
 135 ASM_PFX(ArmWriteCntvOff):
 136   msr   cntvoff_el2, x0          // Write to CNTVOFF (Virtual Offset register)
 137   ret
 138
 139
 140 ASM_FUNCTION_REMOVE_IF_UNREFERENCED