cpu/x86/lapic: Refactor timer_fsb()

Common apic_timer code in cpu/x86 should not depend on
intel header files.

Change-Id: Ib099921d4b8e561daea47219385762bb00fc4548
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34091
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/include/delay.h b/src/include/delay.h
index 8f894d2d30..1c481be917 100644
--- a/src/include/delay.h
+++ b/src/include/delay.h
@@ -1,6 +1,17 @@
 #ifndef DELAY_H
 #define DELAY_H
 
+#include <stdint.h>
+
+#if CONFIG_UDELAY_LAPIC_FIXED_FSB != 0
+static inline u32 get_timer_fsb(void)
+{
+	return CONFIG_UDELAY_LAPIC_FIXED_FSB;
+}
+#else
+u32 get_timer_fsb(void);
+#endif
+
 void init_timer(void);
 
 void udelay(unsigned int usecs);