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TMS570: Power-up errcheck assertion is a headache

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This commit is contained in:
Gregory Nutt 2015-12-28 08:30:03 -06:00
parent c3758286d7
commit 00f70474bb
2 changed files with 44 additions and 12 deletions
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1
arch/arm/src/tms570/chip/tms570_sys.h
View File

@ -606,6 +606,7 @@
#define SYS_ESR_PORST (1 << 15) /* Bit 15: Power-up reset */
#define SYS_ESR_RSTALL (0x0000e038)
#define SYS_ESR_FAILALL (0x00006000)
/* System Test Abort Status Register */
#define SYS_TASR_

55
arch/arm/src/tms570/tms570_boot.c
View File

@ -110,6 +110,47 @@ static inline void tms570_event_export(void)
cp15_wrpmcr(pmcr);
}
/****************************************************************************
* Name: tms570_check_reset
*
* Description:
* Assert if we go here through any mechanism other than a power-on reset.
*
****************************************************************************/
static inline void tms570_check_reset(void)
{
#ifdef CONFIG_DEBUG
uint32_t regval;
/* Read from the system exception status register to identify the cause of
* the CPU reset.
*/
regval = getreg32(TMS570_SYS_ESR);
/* Clear all reset status flags on normal reset */
regval = getreg32(TMS570_SYS_ESR);
putreg32(SYS_ESR_RSTALL, TMS570_SYS_ESR);
/* Check for abnormal reset causes: Oscillator failures or watchdog
* timers. Ignore normal reset causes: External reset, software reset, CPU
* reset, power-on reset
*
* REVISIT: The reset cause is not used in the current design. But if you
* need to know the cause of the reset, here is where you would want to
* do that.
*/
ASSERT((regval & SYS_ESR_FAILALL) == 0);
#else
/* Clear all reset status flags */
putreg32(SYS_ESR_RSTALL, TMS570_SYS_ESR);
#endif
}
/****************************************************************************
* Name: tms570_enable_ramecc
*
@ -195,19 +236,9 @@ void arm_boot(void)
tms570_event_export();
/* Read from the system exception status register to identify the cause of
* the CPU reset.
*
* REVISIT: This logic is not used in the current design. But if you
* need to know the cause of the reset, here is where you would want
* to do that.
*/
/* Verify that we got here via a power-up reset */
DEBUGASSERT((getreg32(TMS570_SYS_ESR) & SYS_ESR_PORST) != 0);
/* Clear all reset status flags on successful power on reset */
putreg32(SYS_ESR_RSTALL, TMS570_SYS_ESR);
tms570_check_reset();
/* Check if there were ESM group3 errors during power-up.
*