From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/x86/include/asm/hpet.h | 118 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 arch/x86/include/asm/hpet.h (limited to 'arch/x86/include/asm/hpet.h') diff --git a/arch/x86/include/asm/hpet.h b/arch/x86/include/asm/hpet.h new file mode 100644 index 000000000..36f712594 --- /dev/null +++ b/arch/x86/include/asm/hpet.h @@ -0,0 +1,118 @@ +#ifndef _ASM_X86_HPET_H +#define _ASM_X86_HPET_H + +#include + +#ifdef CONFIG_HPET_TIMER + +#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_Tn_CFG(n) (0x100 + 0x20 * n) +#define HPET_Tn_CMP(n) (0x108 + 0x20 * n) +#define HPET_Tn_ROUTE(n) (0x110 + 0x20 * n) + +#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_REV 0x000000ff +#define HPET_ID_NUMBER 0x00001f00 +#define HPET_ID_64BIT 0x00002000 +#define HPET_ID_LEGSUP 0x00008000 +#define HPET_ID_VENDOR 0xffff0000 +#define HPET_ID_NUMBER_SHIFT 8 +#define HPET_ID_VENDOR_SHIFT 16 + +#define HPET_CFG_ENABLE 0x001 +#define HPET_CFG_LEGACY 0x002 +#define HPET_LEGACY_8254 2 +#define HPET_LEGACY_RTC 8 + +#define HPET_TN_LEVEL 0x0002 +#define HPET_TN_ENABLE 0x0004 +#define HPET_TN_PERIODIC 0x0008 +#define HPET_TN_PERIODIC_CAP 0x0010 +#define HPET_TN_64BIT_CAP 0x0020 +#define HPET_TN_SETVAL 0x0040 +#define HPET_TN_32BIT 0x0100 +#define HPET_TN_ROUTE 0x3e00 +#define HPET_TN_FSB 0x4000 +#define HPET_TN_FSB_CAP 0x8000 +#define HPET_TN_ROUTE_SHIFT 9 + +/* 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 + +/* hpet memory map physical address */ +extern unsigned long hpet_address; +extern unsigned long force_hpet_address; +extern int boot_hpet_disable; +extern u8 hpet_blockid; +extern int hpet_force_user; +extern u8 hpet_msi_disable; +extern int is_hpet_enabled(void); +extern int hpet_enable(void); +extern void hpet_disable(void); +extern unsigned int hpet_readl(unsigned int a); +extern void force_hpet_resume(void); + +struct irq_data; +extern void hpet_msi_unmask(struct irq_data *data); +extern void hpet_msi_mask(struct irq_data *data); +struct hpet_dev; +extern void hpet_msi_write(struct hpet_dev *hdev, struct msi_msg *msg); +extern void hpet_msi_read(struct hpet_dev *hdev, struct msi_msg *msg); + +#ifdef CONFIG_PCI_MSI +extern int default_setup_hpet_msi(unsigned int irq, unsigned int id); +#else +static inline int default_setup_hpet_msi(unsigned int irq, unsigned int id) +{ + return -EINVAL; +} +#endif + +#ifdef CONFIG_HPET_EMULATE_RTC + +#include + +typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie); +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); +extern int hpet_register_irq_handler(rtc_irq_handler handler); +extern void hpet_unregister_irq_handler(rtc_irq_handler handler); + +#endif /* CONFIG_HPET_EMULATE_RTC */ + +#else /* CONFIG_HPET_TIMER */ + +static inline int hpet_enable(void) { return 0; } +static inline int is_hpet_enabled(void) { return 0; } +#define hpet_readl(a) 0 +#define default_setup_hpet_msi NULL + +#endif +#endif /* _ASM_X86_HPET_H */ -- cgit v1.2.3-54-g00ecf