diff options
Diffstat (limited to 'arch/x86/include/asm/i8259.h')
| -rw-r--r-- | arch/x86/include/asm/i8259.h | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/arch/x86/include/asm/i8259.h b/arch/x86/include/asm/i8259.h index bc4033b..f216c23 100644 --- a/arch/x86/include/asm/i8259.h +++ b/arch/x86/include/asm/i8259.h @@ -8,11 +8,9 @@ /* i8259.h i8259 PIC Registers */ #ifndef _ASMI386_I8259_H_ -#define _ASMI386_I8959_H_ 1 - +#define _ASMI386_I8959_H_ /* PIC I/O mapped registers */ - #define IRR 0x0 /* Interrupt Request Register */ #define ISR 0x0 /* In-Service Register */ #define ICW1 0x0 /* Initialization Control Word 1 */ @@ -23,7 +21,7 @@ #define ICW4 0x1 /* Initialization Control Word 4 */ #define IMR 0x1 /* Interrupt Mask Register */ -/* bits for IRR, IMR, ISR and ICW3 */ +/* IRR, IMR, ISR and ICW3 bits */ #define IR7 0x80 /* IR7 */ #define IR6 0x40 /* IR6 */ #define IR5 0x20 /* IR5 */ @@ -33,7 +31,7 @@ #define IR1 0x02 /* IR1 */ #define IR0 0x01 /* IR0 */ -/* bits for SEOI */ +/* SEOI bits */ #define SEOI_IR7 0x07 /* IR7 */ #define SEOI_IR6 0x06 /* IR6 */ #define SEOI_IR5 0x05 /* IR5 */ @@ -49,9 +47,9 @@ #define OCW2_NOP 0x40 /* NOP */ #define OCW2_SEOI 0x60 /* Specific EOI */ #define OCW2_RSET 0x80 /* Rotate/set */ -#define OCW2_REOI 0xA0 /* Rotate on non specific EOI */ -#define OCW2_PSET 0xC0 /* Priority Set Command */ -#define OCW2_RSEOI 0xE0 /* Rotate on specific EOI */ +#define OCW2_REOI 0xa0 /* Rotate on non specific EOI */ +#define OCW2_PSET 0xc0 /* Priority Set Command */ +#define OCW2_RSEOI 0xe0 /* Rotate on specific EOI */ /* ICW1 bits */ #define ICW1_SEL 0x10 /* Select ICW1 */ @@ -60,15 +58,20 @@ #define ICW1_SNGL 0x02 /* Single PIC */ #define ICW1_EICW4 0x01 /* Expect initilization ICW4 */ -/* ICW2 is the starting vector number */ - -/* ICW2 is bit-mask of present slaves for a master device, - * or the slave ID for a slave device */ +/* + * ICW2 is the starting vector number + * + * ICW2 is bit-mask of present slaves for a master device, + * or the slave ID for a slave device + */ /* ICW4 bits */ -#define ICW4_AEOI 0x02 /* Automatic EOI Mode */ +#define ICW4_AEOI 0x02 /* Automatic EOI Mode */ #define ICW4_PM 0x01 /* Microprocessor Mode */ +#define ELCR1 0x4d0 +#define ELCR2 0x4d1 + int i8259_init(void); -#endif +#endif /* _ASMI386_I8959_H_ */ |