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| author |   Ralf Baechle <ralf@linux-mips.org> | 2007-10-11 23:46:10 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-10-11 23:46:10 +0100 |
| commit | d865bea4dace1d42995a6cf552bc4863842623f4 (patch) | |
| tree | df4519c1646898d3d11817976992c73647a88dac /include | |
| parent | [MIPS] IP27: Add clocksource drivers (diff) | |
| download | linux-dev-d865bea4dace1d42995a6cf552bc4863842623f4.tar.xz linux-dev-d865bea4dace1d42995a6cf552bc4863842623f4.zip | |
[MIPS] i8253 PIT clocksource and clockevent drivers
Derived from the i386 variant with a few x86 complexities chopped off.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-mips/i8253.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/asm-mips/i8253.h b/include/asm-mips/i8253.h new file mode 100644 index 000000000000..8f689d7df6b1 --- /dev/null +++ b/include/asm-mips/i8253.h @@ -0,0 +1,30 @@ +/* + * Machine specific IO port address definition for generic. + * Written by Osamu Tomita <tomita@cinet.co.jp> + */ +#ifndef _MACH_IO_PORTS_H +#define _MACH_IO_PORTS_H + +/* i8253A PIT registers */ +#define PIT_MODE 0x43 +#define PIT_CH0 0x40 +#define PIT_CH2 0x42 + +/* i8259A PIC registers */ +#define PIC_MASTER_CMD 0x20 +#define PIC_MASTER_IMR 0x21 +#define PIC_MASTER_ISR PIC_MASTER_CMD +#define PIC_MASTER_POLL PIC_MASTER_ISR +#define PIC_MASTER_OCW3 PIC_MASTER_ISR +#define PIC_SLAVE_CMD 0xa0 +#define PIC_SLAVE_IMR 0xa1 + +/* i8259A PIC related value */ +#define PIC_CASCADE_IR 2 +#define MASTER_ICW4_DEFAULT 0x01 +#define SLAVE_ICW4_DEFAULT 0x01 +#define PIC_ICW4_AEOI 2 + +extern void setup_pit_timer(void); + +#endif /* !_MACH_IO_PORTS_H */ |