Report correct MediaPresentSupported value from Nt32 SNP mode data.

[mirror_edk2.git] / ArmEbPkg / Library / TimerLib / TimerLib.c

/** @file\r
  TimerLib for ARM EB. Hardcoded to 100ns period\r
\r
  This library assume the following initialization, usually done in SEC. \r
\r
  // configure SP810 to use 1MHz clock and disable\r
  MmioAndThenOr32 (EB_SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);\r
  // Enable\r
  MmioOr32 (EB_SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER2_EN);\r
\r
  // configure timer 2 for one shot operation, 32 bits, no prescaler, and interrupt disabled\r
  MmioOr32 (EB_SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ONESHOT | SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);\r
\r
  // preload the timer count register\r
  MmioWrite32 (EB_SP804_TIMER2_BASE + SP804_TIMER_LOAD_REG, 1);\r
\r
  // enable the timer\r
  MmioOr32 (EB_SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ENABLE);\r
\r
\r
  Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
  \r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Base.h>\r
\r
#include <Library/BaseLib.h>\r
#include <Library/TimerLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/IoLib.h>\r
\r
#include <ArmEb/ArmEb.h>\r
\r
\r
/**\r
  Stalls the CPU for at least the given number of microseconds.\r
\r
  Stalls the CPU for the number of microseconds specified by MicroSeconds.\r
\r
  @param  MicroSeconds  The minimum number of microseconds to delay.\r
\r
  @return The value of MicroSeconds inputted.\r
\r
**/\r
UINTN\r
EFIAPI\r
MicroSecondDelay (\r
  IN  UINTN MicroSeconds\r
  )\r
{\r
  UINT64  NanoSeconds;\r
  \r
  NanoSeconds = MultU64x32 (MicroSeconds, 1000);\r
\r
  while (NanoSeconds > (UINTN)-1) { \r
    NanoSecondDelay((UINTN)-1);\r
    NanoSeconds -= (UINTN)-1;\r
  }\r
\r
  NanoSecondDelay (NanoSeconds);\r
\r
  return MicroSeconds;\r
}\r
\r
/**\r
  Stalls the CPU for at least the given number of nanoseconds.\r
\r
  Stalls the CPU for the number of nanoseconds specified by NanoSeconds.\r
\r
  @param  NanoSeconds The minimum number of nanoseconds to delay.\r
\r
  @return The value of NanoSeconds inputted.\r
\r
**/\r
UINTN\r
EFIAPI\r
NanoSecondDelay (\r
  IN  UINTN NanoSeconds\r
  )\r
{\r
  UINT32  TickNumber;\r
\r
  if (NanoSeconds == 0) {\r
    return NanoSeconds;\r
  }\r
\r
  // Round up to 100ns Tick Number\r
  TickNumber =   (UINT32)NanoSeconds / 100;\r
  TickNumber += ((UINT32)NanoSeconds % 100) == 0 ? 0 : 1;\r
\r
  // load the timer count register\r
  MmioWrite32 (EB_SP804_TIMER2_BASE + SP804_TIMER_LOAD_REG, TickNumber);\r
\r
  while (MmioRead32 (EB_SP804_TIMER2_BASE + SP804_TIMER_CURRENT_REG) > 0) {\r
    ;\r
  } \r
 \r
  return NanoSeconds;\r
}\r
\r
/**\r
  Retrieves the current value of a 64-bit free running performance counter.\r
\r
  The counter can either count up by 1 or count down by 1. If the physical\r
  performance counter counts by a larger increment, then the counter values\r
  must be translated. The properties of the counter can be retrieved from\r
  GetPerformanceCounterProperties().\r
\r
  @return The current value of the free running performance counter.\r
\r
**/\r
UINT64\r
EFIAPI\r
GetPerformanceCounter (\r
  VOID\r
  )\r
{ \r
  // Free running 64-bit/32-bit counter is needed here.\r
  // Don't think we need this to boot, just to do performance profile\r
  ASSERT (FALSE);\r
  return (UINT64)0ULL;\r
}\r
\r
\r
/**\r
  Retrieves the 64-bit frequency in Hz and the range of performance counter\r
  values.\r
\r
  If StartValue is not NULL, then the value that the performance counter starts\r
  with immediately after is it rolls over is returned in StartValue. If\r
  EndValue is not NULL, then the value that the performance counter end with\r
  immediately before it rolls over is returned in EndValue. The 64-bit\r
  frequency of the performance counter in Hz is always returned. If StartValue\r
  is less than EndValue, then the performance counter counts up. If StartValue\r
  is greater than EndValue, then the performance counter counts down. For\r
  example, a 64-bit free running counter that counts up would have a StartValue\r
  of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24-bit free running counter\r
  that counts down would have a StartValue of 0xFFFFFF and an EndValue of 0.\r
\r
  @param  StartValue  The value the performance counter starts with when it\r
                      rolls over.\r
  @param  EndValue    The value that the performance counter ends with before\r
                      it rolls over.\r
\r
  @return The frequency in Hz.\r
\r
**/\r
UINT64\r
EFIAPI\r
GetPerformanceCounterProperties (\r
  OUT UINT64  *StartValue,  OPTIONAL\r
  OUT UINT64  *EndValue     OPTIONAL\r
  )\r
{\r
  if (StartValue != NULL) {\r
    // Timer starts with the reload value\r
    *StartValue = (UINT64)0ULL;\r
  }\r
  \r
  if (EndValue != NULL) {\r
    // Timer counts up to 0xFFFFFFFF\r
    *EndValue = 0xFFFFFFFF;\r
  }\r
  \r
  return 100;\r
}\r
\r
\r