From d865bea4dace1d42995a6cf552bc4863842623f4 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Thu, 11 Oct 2007 23:46:10 +0100 Subject: [MIPS] i8253 PIT clocksource and clockevent drivers Derived from the i386 variant with a few x86 complexities chopped off. Signed-off-by: Ralf Baechle --- include/asm-mips/i8253.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 include/asm-mips/i8253.h (limited to 'include/asm-mips/i8253.h') diff --git a/include/asm-mips/i8253.h b/include/asm-mips/i8253.h new file mode 100644 index 00000000000..8f689d7df6b --- /dev/null +++ b/include/asm-mips/i8253.h @@ -0,0 +1,30 @@ +/* + * Machine specific IO port address definition for generic. + * Written by Osamu Tomita + */ +#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 */ -- cgit v1.2.3