libpayload/libc/time: Add an arch_ndelay()

Replace _delay with an arch_ndelay(). This way each arch can setup their
own delay mechanism.

BUG=b:109749762
TEST=Verified delay's still work on grunt.

Change-Id: I552eb30984f9c21e92dffc9d7b36873e9e2e4ac5
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/28243
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 44 insertions, 4 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)