ide.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- /*
- * linux/include/asm-i386/ide.h
- *
- * Copyright (C) 1994-1996 Linus Torvalds & authors
- */
- /*
- * This file contains the i386 architecture specific IDE code.
- */
- #ifndef __ASMi386_IDE_H
- #define __ASMi386_IDE_H
- #ifdef __KERNEL__
- #include <linux/config.h>
- #ifndef MAX_HWIFS
- # ifdef CONFIG_BLK_DEV_IDEPCI
- #define MAX_HWIFS 10
- # else
- #define MAX_HWIFS 6
- # endif
- #endif
- #define ide__sti() __sti()
- static __inline__ int ide_default_irq(ide_ioreg_t base)
- {
- switch (base) {
- case 0x1f0: return 14;
- case 0x170: return 15;
- case 0x1e8: return 11;
- case 0x168: return 10;
- case 0x1e0: return 8;
- case 0x160: return 12;
- default:
- return 0;
- }
- }
- static __inline__ ide_ioreg_t ide_default_io_base(int index)
- {
- switch (index) {
- case 0: return 0x1f0;
- case 1: return 0x170;
- case 2: return 0x1e8;
- case 3: return 0x168;
- case 4: return 0x1e0;
- case 5: return 0x160;
- default:
- return 0;
- }
- }
- static __inline__ void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
- {
- ide_ioreg_t reg = data_port;
- int i;
- for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
- hw->io_ports[i] = reg;
- reg += 1;
- }
- if (ctrl_port) {
- hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
- } else {
- hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
- }
- if (irq != NULL)
- *irq = 0;
- hw->io_ports[IDE_IRQ_OFFSET] = 0;
- }
- static __inline__ void ide_init_default_hwifs(void)
- {
- #ifndef CONFIG_BLK_DEV_IDEPCI
- hw_regs_t hw;
- int index;
- for(index = 0; index < MAX_HWIFS; index++) {
- ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
- hw.irq = ide_default_irq(ide_default_io_base(index));
- ide_register_hw(&hw, NULL);
- }
- #endif /* CONFIG_BLK_DEV_IDEPCI */
- }
- typedef union {
- unsigned all : 8; /* all of the bits together */
- struct {
- unsigned head : 4; /* always zeros here */
- unsigned unit : 1; /* drive select number, 0 or 1 */
- unsigned bit5 : 1; /* always 1 */
- unsigned lba : 1; /* using LBA instead of CHS */
- unsigned bit7 : 1; /* always 1 */
- } b;
- } select_t;
- typedef union {
- unsigned all : 8; /* all of the bits together */
- struct {
- unsigned bit0 : 1;
- unsigned nIEN : 1; /* device INTRQ to host */
- unsigned SRST : 1; /* host soft reset bit */
- unsigned bit3 : 1; /* ATA-2 thingy */
- unsigned reserved456 : 3;
- unsigned HOB : 1; /* 48-bit address ordering */
- } b;
- } control_t;
- #define ide_request_irq(irq,hand,flg,dev,id) request_irq((irq),(hand),(flg),(dev),(id))
- #define ide_free_irq(irq,dev_id) free_irq((irq), (dev_id))
- #define ide_check_region(from,extent) check_region((from), (extent))
- #define ide_request_region(from,extent,name) request_region((from), (extent), (name))
- #define ide_release_region(from,extent) release_region((from), (extent))
- /*
- * The following are not needed for the non-m68k ports
- */
- #define ide_ack_intr(hwif) (1)
- #define ide_fix_driveid(id) do {} while (0)
- #define ide_release_lock(lock) do {} while (0)
- #define ide_get_lock(lock, hdlr, data) do {} while (0)
- #endif /* __KERNEL__ */
- #endif /* __ASMi386_IDE_H */