Add constants and helpers for system counter interface as can be found in section "I1.3 Generic Timer registers" of "ARM Architecture Reference Manual ARMv8, for ARMv8-A architecture"
Signed-off-by: Andrey Smirnov <[email protected]> --- arch/arm/include/asm/syscounter.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 arch/arm/include/asm/syscounter.h diff --git a/arch/arm/include/asm/syscounter.h b/arch/arm/include/asm/syscounter.h new file mode 100644 index 000000000..a644cfaad --- /dev/null +++ b/arch/arm/include/asm/syscounter.h @@ -0,0 +1,24 @@ +#ifndef _ASM_SYSCNT_H_ +#define _ASM_SYSCNT_H_ + +#include <io.h> + +#define SYSCNT_CNTCR 0x0000 +#define SYSCNT_CNTCR_EN BIT(0) +#define SYSCNT_CNTCR_HDBG BIT(1) +#define SYSCNT_CNTCR_FCREQ(n) BIT(8 + (n)) + +#define SYSCNT_CNTFID(n) (0x0020 + 4 * (n)) + +static inline void syscnt_enable(void __iomem *syscnt) +{ + writel(SYSCNT_CNTCR_EN | SYSCNT_CNTCR_HDBG | SYSCNT_CNTCR_FCREQ(0), + syscnt + SYSCNT_CNTCR); +} + +static inline u32 syscnt_get_cntfrq(void __iomem *syscnt) +{ + return readl(syscnt + SYSCNT_CNTFID(0)); +} + +#endif \ No newline at end of file -- 2.17.0 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
