diff options
Diffstat (limited to 'include/asm-i386/hpet.h')
| -rw-r--r-- | include/asm-i386/hpet.h | 113 |
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 */ |