libpayload: Outsource delay function into own header

For libflashrom we need the delay functions but when including the whole
libpayload.h it has conflicting symbols.

Change-Id: I6e4a669b8ba25836fb870d74c200985c1bfdb387
Signed-off-by: Thomas Heijligen <src@posteo.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70139
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Julius Werner <jwerner@chromium.org>

payloads/libpayload/include/delay.h

@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#ifndef LIBPAYLOAD_DELAY_H
+#define LIBPAYLOAD_DELAY_H
+
+#include <stdint.h>
+
+#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)
+
+unsigned int get_cpu_speed(void);
+
+void arch_ndelay(uint64_t 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);
+}
+
+#endif /* LIBPAYLOAD_DELAY_H */

payloads/libpayload/include/libpayload.h

@@ -68,6 +68,7 @@
 #include <sysinfo.h>
 #include <pci.h>
 #include <archive.h>
+#include <delay.h>
 
 #define BIT(x)	(1ul << (x))
 
@@ -510,53 +511,11 @@ void lib_sysinfo_get_memranges(struct memrange **ranges,
 
 /* Timer functions. */
 /* Defined by each architecture. */
-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. */
 
-/**
- * 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
  * This interface provides a simple implementation of the standard readline()

payloads/libpayload/include/stddef.h

@@ -26,11 +26,4 @@ typedef __SIZE_TYPE__ size_t;
 typedef __SIZE_TYPE__ ssize_t;
 #undef unsigned
 
-#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)
-
 #endif