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Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libbsp/i386/shared/irq/irq_asm.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/shared/irq/irq_asm.h b/c/src/lib/libbsp/i386/shared/irq/irq_asm.h new file mode 100644 index 0000000000..bf6bb17e8e --- /dev/null +++ b/c/src/lib/libbsp/i386/shared/irq/irq_asm.h @@ -0,0 +1,30 @@ +/* irq_asm.h + * + * This include file has defines to represent some contant used + * to program and manage the Intel 8259 interrupt controller + * + * + * COPYRIGHT (c) 1998 valette@crf.canon.fr + * + * The license and distribution terms for this file may be + * found in found in the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ +#ifndef __IRQ_ASM_H__ +#define __IRQ_ASM_H__ + +#define PC386_ASM_IRQ_VECTOR_BASE 0x20 + /* PIC's command and mask registers */ +#define PIC_MASTER_COMMAND_IO_PORT 0x20 /* Master PIC command register */ +#define PIC_SLAVE_COMMAND_IO_PORT 0xa0 /* Slave PIC command register */ +#define PIC_MASTER_IMR_IO_PORT 0x21 /* Master PIC Interrupt Mask Register */ +#define PIC_SLAVE_IMR_IO_PORT 0xa1 /* Slave PIC Interrupt Mask Register */ + + /* Command for specific EOI (End Of Interrupt): Interrupt acknowledge */ +#define PIC_EOSI 0x60 /* End of Specific Interrupt (EOSI) */ +#define PIC_EOI 0x20 /* Generic End of Interrupt (EOI) */ + + +#endif |