diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/erc32/clock/ckinit.c')
| -rw-r--r-- | c/src/lib/libbsp/sparc/erc32/clock/ckinit.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/sparc/erc32/clock/ckinit.c b/c/src/lib/libbsp/sparc/erc32/clock/ckinit.c index 1287645064..111a63d2ca 100644 --- a/c/src/lib/libbsp/sparc/erc32/clock/ckinit.c +++ b/c/src/lib/libbsp/sparc/erc32/clock/ckinit.c @@ -24,6 +24,7 @@ #include <bsp.h> #include <bspopts.h> +#include <rtems/counter.h> #if SIMSPARC_FAST_IDLE==1 #define CLOCK_DRIVER_USE_FAST_IDLE 1 @@ -63,6 +64,16 @@ uint32_t bsp_clock_nanoseconds_since_last_tick(void) #define Clock_driver_nanoseconds_since_last_tick \ bsp_clock_nanoseconds_since_last_tick +static CPU_Counter_ticks erc32_counter_difference( + CPU_Counter_ticks second, + CPU_Counter_ticks first +) +{ + CPU_Counter_ticks period = rtems_configuration_get_microseconds_per_tick(); + + return (first + period - second) % period; +} + #define Clock_driver_support_initialize_hardware() \ do { \ /* approximately 1 us per countdown */ \ @@ -80,6 +91,11 @@ uint32_t bsp_clock_nanoseconds_since_last_tick(void) ERC32_MEC_TIMER_COUNTER_ENABLE_COUNTING | \ ERC32_MEC_TIMER_COUNTER_RELOAD_AT_ZERO \ ); \ + _SPARC_Counter_initialize( \ + &ERC32_MEC.Real_Time_Clock_Counter, \ + erc32_counter_difference \ + ); \ + rtems_counter_initialize_converter(1000000); \ } while (0) #define Clock_driver_support_shutdown_hardware() \ |