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ArmPlatformPkg/SP804TimerLib: Checked both Metronome and Performance timers are initialized

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Prior to this change if Metronome timer was already initialized the initialization of the
Performance timer was skipped.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15577 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin 2014-06-20 18:23:37 +00:00 committed by oliviermartin
parent 97be280174
commit ec6b8eda8f
1 changed files with 4 additions and 8 deletions
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12
ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.c
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@ -1,8 +1,8 @@
/** @file /** @file
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR> Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
Copyright (c) 2011, ARM Limited. All rights reserved. Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at which accompanies this distribution. The full text of the license may be found at
@ -34,9 +34,7 @@ TimerConstructor (
) )
{ {
// Check if the Metronome Timer is already initialized // Check if the Metronome Timer is already initialized
if (MmioRead32(SP804_TIMER_METRONOME_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) { if ((MmioRead32 (SP804_TIMER_METRONOME_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) == 0) {
return RETURN_SUCCESS;
} else {
// Configure the Metronome Timer for free running operation, 32 bits, no prescaler, and interrupt disabled // Configure the Metronome Timer for free running operation, 32 bits, no prescaler, and interrupt disabled
MmioWrite32 (SP804_TIMER_METRONOME_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1); MmioWrite32 (SP804_TIMER_METRONOME_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);
@ -45,9 +43,7 @@ TimerConstructor (
} }
// Check if the Performance Timer is already initialized // Check if the Performance Timer is already initialized
if (MmioRead32(SP804_TIMER_PERFORMANCE_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) { if ((MmioRead32 (SP804_TIMER_PERFORMANCE_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) == 0) {
return RETURN_SUCCESS;
} else {
// Configure the Performance timer for free running operation, 32 bits, no prescaler, interrupt disabled // Configure the Performance timer for free running operation, 32 bits, no prescaler, interrupt disabled
MmioWrite32 (SP804_TIMER_PERFORMANCE_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1); MmioWrite32 (SP804_TIMER_PERFORMANCE_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);