1 files changed, 113 insertions, 0 deletions

diff --git a/include/asm-i386/hpet.h b/include/asm-i386/hpet.h
new file mode 100644
index 000000000000..6e20b079f1d3
--- /dev/null
+++ b/include/asm-i386/hpet.h
@@ -0,0 +1,113 @@
+
+#ifndef _I386_HPET_H
+#define _I386_HPET_H
+
+#ifdef CONFIG_HPET_TIMER
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/irq.h>
+#include <asm/msr.h>
+#include <asm/delay.h>
+#include <asm/mpspec.h>
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+
+#include <linux/timex.h>
+#include <linux/config.h>
+
+#include <asm/fixmap.h>
+
+/*
+ * Documentation on HPET can be found at:
+ *      http://www.intel.com/ial/home/sp/pcmmspec.htm
+ *      ftp://download.intel.com/ial/home/sp/mmts098.pdf
+ */
+
+#define HPET_MMAP_SIZE  1024
+
+#define HPET_ID         0x000
+#define HPET_PERIOD     0x004
+#define HPET_CFG        0x010
+#define HPET_STATUS     0x020
+#define HPET_COUNTER    0x0f0
+#define HPET_T0_CFG     0x100
+#define HPET_T0_CMP     0x108
+#define HPET_T0_ROUTE   0x110
+#define HPET_T1_CFG     0x120
+#define HPET_T1_CMP     0x128
+#define HPET_T1_ROUTE   0x130
+#define HPET_T2_CFG     0x140
+#define HPET_T2_CMP     0x148
+#define HPET_T2_ROUTE   0x150
+
+#define HPET_ID_LEGSUP  0x00008000
+#define HPET_ID_NUMBER  0x00001f00
+#define HPET_ID_REV     0x000000ff
+#define HPET_ID_NUMBER_SHIFT    8
+
+#define HPET_CFG_ENABLE 0x001
+#define HPET_CFG_LEGACY 0x002
+#define HPET_LEGACY_8254        2
+#define HPET_LEGACY_RTC         8
+
+#define HPET_TN_ENABLE          0x004
+#define HPET_TN_PERIODIC        0x008
+#define HPET_TN_PERIODIC_CAP    0x010
+#define HPET_TN_SETVAL          0x040
+#define HPET_TN_32BIT           0x100
+
+/* Use our own asm for 64 bit multiply/divide */
+#define ASM_MUL64_REG(eax_out,edx_out,reg_in,eax_in)                    \
+                __asm__ __volatile__("mull %2"                          \
+                                :"=a" (eax_out), "=d" (edx_out)         \
+                                :"r" (reg_in), "0" (eax_in))
+
+#define ASM_DIV64_REG(eax_out,edx_out,reg_in,eax_in,edx_in)             \
+                __asm__ __volatile__("divl %2"                          \
+                                :"=a" (eax_out), "=d" (edx_out)         \
+                                :"r" (reg_in), "0" (eax_in), "1" (edx_in))
+
+#define KERNEL_TICK_USEC        (1000000UL/HZ)  /* tick value in microsec */
+/* Max HPET Period is 10^8 femto sec as in HPET spec */
+#define HPET_MAX_PERIOD (100000000UL)
+/*
+ * Min HPET period is 10^5 femto sec just for safety. If it is less than this,
+ * then 32 bit HPET counter wrapsaround in less than 0.5 sec.
+ */
+#define HPET_MIN_PERIOD (100000UL)
+
+extern unsigned long hpet_tick;         /* hpet clks count per tick */
+extern unsigned long hpet_address;      /* hpet memory map physical address */
+
+extern int hpet_rtc_timer_init(void);
+extern int hpet_enable(void);
+extern int hpet_reenable(void);
+extern int is_hpet_enabled(void);
+extern int is_hpet_capable(void);
+extern int hpet_readl(unsigned long a);
+
+#ifdef CONFIG_HPET_EMULATE_RTC
+extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
+extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
+extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min, unsigned char sec);
+extern int hpet_set_periodic_freq(unsigned long freq);
+extern int hpet_rtc_dropped_irq(void);
+extern int hpet_rtc_timer_init(void);
+extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+#endif /* CONFIG_HPET_EMULATE_RTC */
+#endif /* CONFIG_HPET_TIMER */
+#endif /* _I386_HPET_H */