libpayload: Add gettimeofday() and friends

Add a gettimeofday() implementation - it works pretty well, but it
drifts a little bit so its not very suitable for keeping time.  It
works best to track changes in time over small periods of time.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3272 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

3 files changed, 30 insertions, 2 deletions

diff --git a/payloads/libpayload/include/arch/rdtsc.h b/payloads/libpayload/include/arch/rdtsc.h
index da7949d808..52f8c9c83c 100644
--- a/payloads/libpayload/include/arch/rdtsc.h
+++ b/payloads/libpayload/include/arch/rdtsc.h
@@ -30,9 +30,9 @@
 #ifndef _ARCH_RDTSC_H
 #define _ARCH_RDTSC_H
 
-static inline unsigned long long rdtsc(void)
+static u64 rdtsc(void)
 {
-	unsigned long long val;
+	u64 val;
 	__asm__ __volatile__ ("rdtsc" : "=A" (val));
 	return val;
 }
diff --git a/payloads/libpayload/include/arch/types.h b/payloads/libpayload/include/arch/types.h
index 641fb0aef8..1bd815bb44 100644
--- a/payloads/libpayload/include/arch/types.h
+++ b/payloads/libpayload/include/arch/types.h
@@ -50,6 +50,9 @@ typedef unsigned long long u64;
 typedef signed long long int64_t;
 typedef signed long long s64;
 
+typedef long time_t;
+typedef long suseconds_t;
+
 #ifndef NULL
 #define NULL ((void *)0)
 #endif
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h
index d557eeff69..5bafb305ef 100644
--- a/payloads/libpayload/include/libpayload.h
+++ b/payloads/libpayload/include/libpayload.h
@@ -61,10 +61,26 @@
 #define NVRAM_RTC_DAY            7
 #define NVRAM_RTC_MONTH          8
 #define NVRAM_RTC_YEAR           9
+#define NVRAM_RTC_FREQ_SELECT    10
+#define  NVRAM_RTC_UIP           0x80
+
+struct tm {
+	int tm_sec;
+	int tm_min;
+	int tm_hour;
+	int tm_mday;
+	int tm_mon;
+	int tm_year;
+	int tm_wday;
+	int tm_yday;
+	int tm_isdst;
+};
 
 /* drivers/nvram.c */
 u8 nvram_read(u8 addr);
 void nvram_write(u8 val, u8 addr);
+int nvram_updating(void);
+void rtc_read_clock(struct tm *tm);
 
 /* drivers/keyboard.c */
 void keyboard_init(void);
@@ -182,6 +198,15 @@ char *strchr(const char *s, int c);
 char *strdup(const char *s);
 char *strstr(const char *h, const char *n);
 
+/* libc/time.c */
+
+struct timeval {
+	time_t tv_sec;
+	suseconds_t tv_usec;
+};
+
+int gettimeofday(struct timeval *tv, void *tz);
+
 /* i386/coreboot.c */
 int get_coreboot_info(struct sysinfo_t *info);