21fd5132b2
Make conversion of i8259 very mechanical -- i8259 was generated by diff -D, with too different parts left in i8259_32 and i8259_64.c. Only "by hand" changes were removal of #ifdef from middle of the comment (prevented compilation) and removal of one static to allow splitting into files. Of course, it will need some cleanups now, and those will follow. Signed-of-by: Pavel Machek <pavel@suse.cz>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
#ifndef __ASM_I8259_H__
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#define __ASM_I8259_H__
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#include <linux/delay.h>
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extern unsigned int cached_irq_mask;
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#define __byte(x, y) (((unsigned char *)&(y))[x])
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#define cached_master_mask (__byte(0, cached_irq_mask))
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#define cached_slave_mask (__byte(1, cached_irq_mask))
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/* i8259A PIC registers */
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#define PIC_MASTER_CMD 0x20
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#define PIC_MASTER_IMR 0x21
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#define PIC_MASTER_ISR PIC_MASTER_CMD
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#define PIC_MASTER_POLL PIC_MASTER_ISR
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#define PIC_MASTER_OCW3 PIC_MASTER_ISR
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#define PIC_SLAVE_CMD 0xa0
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#define PIC_SLAVE_IMR 0xa1
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/* i8259A PIC related value */
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#define PIC_CASCADE_IR 2
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#define MASTER_ICW4_DEFAULT 0x01
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#define SLAVE_ICW4_DEFAULT 0x01
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#define PIC_ICW4_AEOI 2
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extern spinlock_t i8259A_lock;
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extern void init_8259A(int auto_eoi);
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extern void enable_8259A_irq(unsigned int irq);
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extern void disable_8259A_irq(unsigned int irq);
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extern unsigned int startup_8259A_irq(unsigned int irq);
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/* the PIC may need a careful delay on some platforms, hence specific calls */
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static inline unsigned char inb_pic(unsigned int port)
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{
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unsigned char value = inb(port);
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/*
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* delay for some accesses to PIC on motherboard or in chipset
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* must be at least one microsecond, so be safe here:
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*/
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udelay(2);
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return value;
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}
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static inline void outb_pic(unsigned char value, unsigned int port)
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{
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outb(value, port);
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/*
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* delay for some accesses to PIC on motherboard or in chipset
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* must be at least one microsecond, so be safe here:
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*/
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udelay(2);
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}
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extern struct irq_chip i8259A_chip;
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#endif /* __ASM_I8259_H__ */
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