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-rw-r--r--payloads/libpayload/include/libpayload.h45
-rw-r--r--payloads/libpayload/include/stddef.h3
-rw-r--r--payloads/libpayload/libc/time.c44
3 files changed, 47 insertions, 45 deletions
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h
index 359bd0e4ce..c2510b7373 100644
--- a/payloads/libpayload/include/libpayload.h
+++ b/payloads/libpayload/include/libpayload.h
@@ -464,11 +464,48 @@ unsigned int get_cpu_speed(void);
uint64_t timer_hz(void);
uint64_t timer_raw_value(void);
uint64_t timer_us(uint64_t base);
+void arch_ndelay(uint64_t n);
/* Generic. */
-void ndelay(unsigned int n);
-void udelay(unsigned int n);
-void mdelay(unsigned int n);
-void delay(unsigned int n);
+
+/**
+ * Delay for a specified number of nanoseconds.
+ *
+ * @param ns Number of nanoseconds to delay for.
+ */
+static inline void ndelay(unsigned int ns)
+{
+ arch_ndelay((uint64_t)ns);
+}
+
+/**
+ * Delay for a specified number of microseconds.
+ *
+ * @param us Number of microseconds to delay for.
+ */
+static inline void udelay(unsigned int us)
+{
+ arch_ndelay((uint64_t)us * NSECS_PER_USEC);
+}
+
+/**
+ * Delay for a specified number of milliseconds.
+ *
+ * @param ms Number of milliseconds to delay for.
+ */
+static inline void mdelay(unsigned int ms)
+{
+ arch_ndelay((uint64_t)ms * NSECS_PER_MSEC);
+}
+
+/**
+ * Delay for a specified number of seconds.
+ *
+ * @param s Number of seconds to delay for.
+ */
+static inline void delay(unsigned int s)
+{
+ arch_ndelay((uint64_t)s * NSECS_PER_SEC);
+}
/**
* @defgroup readline Readline functions
diff --git a/payloads/libpayload/include/stddef.h b/payloads/libpayload/include/stddef.h
index 4e41eedfe8..725ff0bcb5 100644
--- a/payloads/libpayload/include/stddef.h
+++ b/payloads/libpayload/include/stddef.h
@@ -29,6 +29,9 @@ typedef __SIZE_TYPE__ ssize_t;
#define MHz (1000*KHz)
#define GHz (1000*MHz)
+#define NSECS_PER_SEC 1000000000
#define USECS_PER_SEC 1000000
#define MSECS_PER_SEC 1000
+#define NSECS_PER_MSEC (NSECS_PER_SEC / MSECS_PER_SEC)
+#define NSECS_PER_USEC (NSECS_PER_SEC / USECS_PER_SEC)
#define USECS_PER_MSEC (USECS_PER_SEC / MSECS_PER_SEC)
diff --git a/payloads/libpayload/libc/time.c b/payloads/libpayload/libc/time.c
index 46306bb1ba..f8913466dc 100644
--- a/payloads/libpayload/libc/time.c
+++ b/payloads/libpayload/libc/time.c
@@ -158,52 +158,14 @@ int gettimeofday(struct timeval *tv, void *tz)
return 0;
}
-static inline void _delay(uint64_t delta)
+__attribute__((weak))
+void arch_ndelay(uint64_t ns)
{
+ uint64_t delta = ns * timer_hz() / NSECS_PER_SEC;
uint64_t start = timer_raw_value();
while (timer_raw_value() - start < delta) ;
}
-/**
- * Delay for a specified number of nanoseconds.
- *
- * @param n Number of nanoseconds to delay for.
- */
-void ndelay(unsigned int n)
-{
- _delay((uint64_t)n * timer_hz() / 1000000000);
-}
-
-/**
- * Delay for a specified number of microseconds.
- *
- * @param n Number of microseconds to delay for.
- */
-void udelay(unsigned int n)
-{
- _delay((uint64_t)n * timer_hz() / 1000000);
-}
-
-/**
- * Delay for a specified number of milliseconds.
- *
- * @param m Number of milliseconds to delay for.
- */
-void mdelay(unsigned int m)
-{
- _delay((uint64_t)m * timer_hz() / 1000);
-}
-
-/**
- * Delay for a specified number of seconds.
- *
- * @param s Number of seconds to delay for.
- */
-void delay(unsigned int s)
-{
- _delay((uint64_t)s * timer_hz());
-}
-
u64 timer_us(u64 base)
{
static u64 hz;