ArmPkg/Library/ArmLib/AArch64/AArch64ArchTimerSupport.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2011 - 2013, ARM Limited. All rights reserved.
   4 # Copyright (c) 2016, Linaro 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 <AsmMacroIoLibV8.h>
  17
  18 ASM_FUNC(ArmReadCntFrq)
  19   mrs   x0, cntfrq_el0           // Read CNTFRQ
  20   ret
  21
  22
  23 # NOTE - Can only write while at highest implemented EL level (EL3 on model). Else ReadOnly (EL2, EL1, EL0)
  24 ASM_FUNC(ArmWriteCntFrq)
  25   msr   cntfrq_el0, x0           // Write to CNTFRQ
  26   ret
  27
  28
  29 ASM_FUNC(ArmReadCntPct)
  30   mrs   x0, cntpct_el0           // Read CNTPCT (Physical counter register)
  31   ret
  32
  33
  34 ASM_FUNC(ArmReadCntkCtl)
  35   mrs   x0, cntkctl_el1          // Read CNTK_CTL (Timer PL1 Control Register)
  36   ret
  37
  38
  39 ASM_FUNC(ArmWriteCntkCtl)
  40   msr   cntkctl_el1, x0          // Write to CNTK_CTL (Timer PL1 Control Register)
  41   ret
  42
  43
  44 ASM_FUNC(ArmReadCntpTval)
  45   mrs   x0, cntp_tval_el0        // Read CNTP_TVAL (PL1 physical timer value register)
  46   ret
  47
  48
  49 ASM_FUNC(ArmWriteCntpTval)
  50   msr   cntp_tval_el0, x0        // Write to CNTP_TVAL (PL1 physical timer value register)
  51   ret
  52
  53
  54 ASM_FUNC(ArmReadCntpCtl)
  55   mrs   x0, cntp_ctl_el0         // Read CNTP_CTL (PL1 Physical Timer Control Register)
  56   ret
  57
  58
  59 ASM_FUNC(ArmWriteCntpCtl)
  60   msr   cntp_ctl_el0, x0         // Write to  CNTP_CTL (PL1 Physical Timer Control Register)
  61   ret
  62
  63
  64 ASM_FUNC(ArmReadCntvTval)
  65   mrs   x0, cntv_tval_el0        // Read CNTV_TVAL (Virtual Timer Value register)
  66   ret
  67
  68
  69 ASM_FUNC(ArmWriteCntvTval)
  70   msr   cntv_tval_el0, x0        // Write to CNTV_TVAL (Virtual Timer Value register)
  71   ret
  72
  73
  74 ASM_FUNC(ArmReadCntvCtl)
  75   mrs   x0, cntv_ctl_el0         // Read CNTV_CTL (Virtual Timer Control Register)
  76   ret
  77
  78
  79 ASM_FUNC(ArmWriteCntvCtl)
  80   msr   cntv_ctl_el0, x0         // Write to CNTV_CTL (Virtual Timer Control Register)
  81   ret
  82
  83
  84 ASM_FUNC(ArmReadCntvCt)
  85   mrs  x0, cntvct_el0            // Read CNTVCT  (Virtual Count Register)
  86   ret
  87
  88
  89 ASM_FUNC(ArmReadCntpCval)
  90   mrs   x0, cntp_cval_el0        // Read CNTP_CTVAL (Physical Timer Compare Value Register)
  91   ret
  92
  93
  94 ASM_FUNC(ArmWriteCntpCval)
  95   msr   cntp_cval_el0, x0        // Write to CNTP_CTVAL (Physical Timer Compare Value Register)
  96   ret
  97
  98
  99 ASM_FUNC(ArmReadCntvCval)
 100   mrs   x0, cntv_cval_el0        // Read CNTV_CTVAL (Virtual Timer Compare Value Register)
 101   ret
 102
 103
 104 ASM_FUNC(ArmWriteCntvCval)
 105   msr   cntv_cval_el0, x0        // write to  CNTV_CTVAL (Virtual Timer Compare Value Register)
 106   ret
 107
 108
 109 ASM_FUNC(ArmReadCntvOff)
 110   mrs   x0, cntvoff_el2          // Read CNTVOFF (virtual Offset register)
 111   ret
 112
 113
 114 ASM_FUNC(ArmWriteCntvOff)
 115   msr   cntvoff_el2, x0          // Write to CNTVOFF (Virtual Offset register)
 116   ret
 117
 118
 119 ASM_FUNCTION_REMOVE_IF_UNREFERENCED