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      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
    120