diff options
Diffstat (limited to 'arch/arm/cpu/armv8/generic_timer.c')
| -rw-r--r-- | arch/arm/cpu/armv8/generic_timer.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/generic_timer.c b/arch/arm/cpu/armv8/generic_timer.c index 223b95e210..8e60baebc5 100644 --- a/arch/arm/cpu/armv8/generic_timer.c +++ b/arch/arm/cpu/armv8/generic_timer.c @@ -25,7 +25,18 @@ unsigned long get_tbclk(void) unsigned long timer_read_counter(void) { unsigned long cntpct; +#ifdef CONFIG_SYS_FSL_ERRATUM_A008585 + /* This erratum number needs to be confirmed to match ARM document */ + unsigned long temp; +#endif isb(); asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct)); +#ifdef CONFIG_SYS_FSL_ERRATUM_A008585 + asm volatile("mrs %0, cntpct_el0" : "=r" (temp)); + while (temp != cntpct) { + asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct)); + asm volatile("mrs %0, cntpct_el0" : "=r" (temp)); + } +#endif return cntpct; } |