116 lines
4.3 KiB
C
116 lines
4.3 KiB
C
/* pic.h - public Intel 8259 PIC APIs */
|
|
|
|
/*
|
|
* Copyright (c) 2015 Wind River Systems, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1) Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2) Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* 3) Neither the name of Wind River Systems nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef __INCpich
|
|
#define __INCpich
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if defined(CONFIG_PIC) || defined(CONFIG_SHUTOFF_PIC)
|
|
|
|
/* programmable interrupt controller info (pair of cascaded 8259A devices) */
|
|
|
|
#define PIC_MASTER_BASE_ADRS 0x20
|
|
#define PIC_SLAVE_BASE_ADRS 0xa0
|
|
#define PIC_MASTER_STRAY_INT_LVL 0x07 /* master PIC stray IRQ */
|
|
#define PIC_SLAVE_STRAY_INT_LVL 0x0f /* slave PIC stray IRQ */
|
|
#define PIC_MAX_INT_LVL 0x0f /* max interrupt level in PIC */
|
|
#define PIC_REG_ADDR_INTERVAL 1
|
|
#define INT_VEC_IRQ0 0x20 /* vector number for PIC IRQ0 */
|
|
#define N_PIC_IRQS 16 /* number of PIC IRQs */
|
|
|
|
#define I8259_EOI 0x20 /* EOI bit in OCW2 */
|
|
|
|
/* register definitions */
|
|
#define PIC_ADRS(baseAdrs, reg) (baseAdrs + (reg * PIC_REG_ADDR_INTERVAL))
|
|
|
|
#define PIC_PORT1(base) PIC_ADRS(base, 0x00) /* port 1 */
|
|
#define PIC_PORT2(base) PIC_ADRS(base, 0x01) /* port 2 */
|
|
|
|
#define PIC_IMASK(base) PIC_PORT2(base) /* Int Mask Reg */
|
|
#define PIC_IACK(base) PIC_PORT1(base) /* Int Ack Reg */
|
|
|
|
#define PIC_ISR_MASK(base) PIC_PORT1(base) /* in-service register mask */
|
|
#define PIC_IRR_MASK(base) PIC_PORT1(base) /* interrupt request reg */
|
|
|
|
#ifdef _ASMLANGUAGE
|
|
|
|
GTEXT(_i8259_boi_master)
|
|
GTEXT(_i8259_boi_slave)
|
|
GTEXT(_i8259_eoi_master)
|
|
GTEXT(_i8259_eoi_slave)
|
|
|
|
.macro pic_master_mkstub device isr
|
|
GTEXT(_\()\device\()_\()\isr\()_stub)
|
|
|
|
SECTION_FUNC(TEXT, _\()\device\()_\()\isr\()_stub)
|
|
call _IntEnt /* Inform kernel interrupt has begun */
|
|
pushl $0 /* Push dummy parameter */
|
|
call \isr /* Call actual interrupt handler */
|
|
call _i8259_eoi_master /* Inform PIC interrupt is done */
|
|
addl $4, %esp /* Clean-up stack from push above */
|
|
jmp _IntExit /* Inform kernel interrupt is done */
|
|
.endm
|
|
|
|
.macro pic_slave_mkstub device isr
|
|
GTEXT(_\()\device\()_\()\isr\()_stub)
|
|
|
|
SECTION_FUNC(TEXT, _\()\device\()_\()\isr\()_stub)
|
|
call _IntEnt /* Inform kernel interrupt has begun */
|
|
pushl $0 /* Push dummy parameter */
|
|
call \isr /* Call actual interrupt handler */
|
|
call _i8259_eoi_slave /* Inform PIC interrupt is done */
|
|
addl $4, %esp /* Clean-up stack from push above */
|
|
jmp _IntExit /* Inform kernel interrupt is done */
|
|
.endm
|
|
#else /* _ASMLANGUAGE */
|
|
|
|
extern void _i8259_init(void);
|
|
extern void _i8259_boi_master(void);
|
|
extern void _i8259_boi_slave(void);
|
|
extern void _i8259_eoi_master(unsigned int irq);
|
|
extern void _i8259_eoi_slave(unsigned int irq);
|
|
extern void _i8259_irq_enable(unsigned int irq);
|
|
extern void _i8259_irq_disable(unsigned int irq);
|
|
|
|
#endif /* _ASMLANGUAGE */
|
|
|
|
#endif /* CONFIG_PIC || CONFIG_SHUTOFF_PIC */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __INCpich */
|