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 # SPDX-License-Identifier: BSD-2-Clause-Patent
   7 #
   8 #------------------------------------------------------------------------------
   9
  10 #include <AsmMacroIoLibV8.h>
  11
  12 ASM_FUNC(ArmReadCntFrq)
  13   mrs   x0, cntfrq_el0           // Read CNTFRQ
  14   ret
  15
  16
  17 # NOTE - Can only write while at highest implemented EL level (EL3 on model). Else ReadOnly (EL2, EL1, EL0)
  18 ASM_FUNC(ArmWriteCntFrq)
  19   msr   cntfrq_el0, x0           // Write to CNTFRQ
  20   ret
  21
  22
  23 ASM_FUNC(ArmReadCntPct)
  24   mrs   x0, cntpct_el0           // Read CNTPCT (Physical counter register)
  25   ret
  26
  27
  28 ASM_FUNC(ArmReadCntkCtl)
  29   mrs   x0, cntkctl_el1          // Read CNTK_CTL (Timer PL1 Control Register)
  30   ret
  31
  32
  33 ASM_FUNC(ArmWriteCntkCtl)
  34   msr   cntkctl_el1, x0          // Write to CNTK_CTL (Timer PL1 Control Register)
  35   ret
  36
  37
  38 ASM_FUNC(ArmReadCntpTval)
  39   mrs   x0, cntp_tval_el0        // Read CNTP_TVAL (PL1 physical timer value register)
  40   ret
  41
  42
  43 ASM_FUNC(ArmWriteCntpTval)
  44   msr   cntp_tval_el0, x0        // Write to CNTP_TVAL (PL1 physical timer value register)
  45   ret
  46
  47
  48 ASM_FUNC(ArmReadCntpCtl)
  49   mrs   x0, cntp_ctl_el0         // Read CNTP_CTL (PL1 Physical Timer Control Register)
  50   ret
  51
  52
  53 ASM_FUNC(ArmWriteCntpCtl)
  54   msr   cntp_ctl_el0, x0         // Write to  CNTP_CTL (PL1 Physical Timer Control Register)
  55   ret
  56
  57
  58 ASM_FUNC(ArmReadCntvTval)
  59   mrs   x0, cntv_tval_el0        // Read CNTV_TVAL (Virtual Timer Value register)
  60   ret
  61
  62
  63 ASM_FUNC(ArmWriteCntvTval)
  64   msr   cntv_tval_el0, x0        // Write to CNTV_TVAL (Virtual Timer Value register)
  65   ret
  66
  67
  68 ASM_FUNC(ArmReadCntvCtl)
  69   mrs   x0, cntv_ctl_el0         // Read CNTV_CTL (Virtual Timer Control Register)
  70   ret
  71
  72
  73 ASM_FUNC(ArmWriteCntvCtl)
  74   msr   cntv_ctl_el0, x0         // Write to CNTV_CTL (Virtual Timer Control Register)
  75   ret
  76
  77
  78 ASM_FUNC(ArmReadCntvCt)
  79   mrs  x0, cntvct_el0            // Read CNTVCT  (Virtual Count Register)
  80   ret
  81
  82
  83 ASM_FUNC(ArmReadCntpCval)
  84   mrs   x0, cntp_cval_el0        // Read CNTP_CTVAL (Physical Timer Compare Value Register)
  85   ret
  86
  87
  88 ASM_FUNC(ArmWriteCntpCval)
  89   msr   cntp_cval_el0, x0        // Write to CNTP_CTVAL (Physical Timer Compare Value Register)
  90   ret
  91
  92
  93 ASM_FUNC(ArmReadCntvCval)
  94   mrs   x0, cntv_cval_el0        // Read CNTV_CTVAL (Virtual Timer Compare Value Register)
  95   ret
  96
  97
  98 ASM_FUNC(ArmWriteCntvCval)
  99   msr   cntv_cval_el0, x0        // write to  CNTV_CTVAL (Virtual Timer Compare Value Register)
 100   ret
 101
 102
 103 ASM_FUNC(ArmReadCntvOff)
 104   mrs   x0, cntvoff_el2          // Read CNTVOFF (virtual Offset register)
 105   ret
 106
 107
 108 ASM_FUNC(ArmWriteCntvOff)
 109   msr   cntvoff_el2, x0          // Write to CNTVOFF (Virtual Offset register)
 110   ret
 111
 112
 113 ASM_FUNCTION_REMOVE_IF_UNREFERENCED