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Diffstat (limited to 'include/asm-x86/mc146818rtc.h')
-rw-r--r--include/asm-x86/mc146818rtc.h104
1 files changed, 0 insertions, 104 deletions
diff --git a/include/asm-x86/mc146818rtc.h b/include/asm-x86/mc146818rtc.h
deleted file mode 100644
index a995f33176c..00000000000
--- a/include/asm-x86/mc146818rtc.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Machine dependent access functions for RTC registers.
- */
-#ifndef ASM_X86__MC146818RTC_H
-#define ASM_X86__MC146818RTC_H
-
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <linux/mc146818rtc.h>
-
-#ifndef RTC_PORT
-#define RTC_PORT(x) (0x70 + (x))
-#define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */
-#endif
-
-#if defined(CONFIG_X86_32) && defined(__HAVE_ARCH_CMPXCHG)
-/*
- * This lock provides nmi access to the CMOS/RTC registers. It has some
- * special properties. It is owned by a CPU and stores the index register
- * currently being accessed (if owned). The idea here is that it works
- * like a normal lock (normally). However, in an NMI, the NMI code will
- * first check to see if its CPU owns the lock, meaning that the NMI
- * interrupted during the read/write of the device. If it does, it goes ahead
- * and performs the access and then restores the index register. If it does
- * not, it locks normally.
- *
- * Note that since we are working with NMIs, we need this lock even in
- * a non-SMP machine just to mark that the lock is owned.
- *
- * This only works with compare-and-swap. There is no other way to
- * atomically claim the lock and set the owner.
- */
-#include <linux/smp.h>
-extern volatile unsigned long cmos_lock;
-
-/*
- * All of these below must be called with interrupts off, preempt
- * disabled, etc.
- */
-
-static inline void lock_cmos(unsigned char reg)
-{
- unsigned long new;
- new = ((smp_processor_id() + 1) << 8) | reg;
- for (;;) {
- if (cmos_lock) {
- cpu_relax();
- continue;
- }
- if (__cmpxchg(&cmos_lock, 0, new, sizeof(cmos_lock)) == 0)
- return;
- }
-}
-
-static inline void unlock_cmos(void)
-{
- cmos_lock = 0;
-}
-
-static inline int do_i_have_lock_cmos(void)
-{
- return (cmos_lock >> 8) == (smp_processor_id() + 1);
-}
-
-static inline unsigned char current_lock_cmos_reg(void)
-{
- return cmos_lock & 0xff;
-}
-
-#define lock_cmos_prefix(reg) \
- do { \
- unsigned long cmos_flags; \
- local_irq_save(cmos_flags); \
- lock_cmos(reg)
-
-#define lock_cmos_suffix(reg) \
- unlock_cmos(); \
- local_irq_restore(cmos_flags); \
- } while (0)
-#else
-#define lock_cmos_prefix(reg) do {} while (0)
-#define lock_cmos_suffix(reg) do {} while (0)
-#define lock_cmos(reg)
-#define unlock_cmos()
-#define do_i_have_lock_cmos() 0
-#define current_lock_cmos_reg() 0
-#endif
-
-/*
- * The yet supported machines all access the RTC index register via
- * an ISA port access but the way to access the date register differs ...
- */
-#define CMOS_READ(addr) rtc_cmos_read(addr)
-#define CMOS_WRITE(val, addr) rtc_cmos_write(val, addr)
-unsigned char rtc_cmos_read(unsigned char addr);
-void rtc_cmos_write(unsigned char val, unsigned char addr);
-
-extern int mach_set_rtc_mmss(unsigned long nowtime);
-extern unsigned long mach_get_cmos_time(void);
-
-#define RTC_IRQ 8
-
-#endif /* ASM_X86__MC146818RTC_H */