i8259.h

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/* irq.h
 *
 *  This include file describe the data structure and the functions implemented
 *  by RTEMS to control the i8259 chip.
 *
 *  Copyright (C) 1999 valette@crf.canon.fr
 *
 *  This code is heavilly inspired by the public specification of STREAM V2
 *  that can be found at :
 *
 *      <http://www.chorus.com/Documentation/index.html> by following
 *  the STREAM API Specification Document link.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#ifndef I8259_H
#define I8259_H

#if 1 
#define ISA8259_M_ELCR      0x4d0
#define ISA8259_S_ELCR      0x4d1
#endif

#define ELCRS_INT15_LVL         0x80
#define ELCRS_INT14_LVL         0x40
#define ELCRS_INT13_LVL         0x20
#define ELCRS_INT12_LVL         0x10
#define ELCRS_INT11_LVL         0x08
#define ELCRS_INT10_LVL         0x04
#define ELCRS_INT9_LVL          0x02
#define ELCRS_INT8_LVL          0x01
#define ELCRM_INT7_LVL          0x80
#define ELCRM_INT6_LVL          0x40
#define ELCRM_INT5_LVL          0x20
#define ELCRM_INT4_LVL          0x10
#define ELCRM_INT3_LVL          0x8
#define ELCRM_INT2_LVL          0x4
#define ELCRM_INT1_LVL          0x2
#define ELCRM_INT0_LVL          0x1

#define PIC_MASTER_COMMAND_IO_PORT      0x20    
#define PIC_SLAVE_COMMAND_IO_PORT       0xa0    
#define PIC_MASTER_IMR_IO_PORT          0x21    
#define PIC_SLAVE_IMR_IO_PORT           0xa1    


#define PIC_EOSI    0x60    
#define SLAVE_PIC_EOSI  0x62    
#define PIC_EOI     0x20    


#ifndef ASM

#ifdef __cplusplus
extern "C" {
#endif

/*
 * rtems_irq_number Definitions
 */
#if 0

#define BSP_ISA_IRQ_NUMBER      (16)
#define BSP_ISA_IRQ_LOWEST_OFFSET   (0)
#define BSP_ISA_IRQ_MAX_OFFSET      (BSP_ISA_IRQ_LOWEST_OFFSET + BSP_ISA_IRQ_NUMBER - 1)

#ifndef qemu
#define BSP_PCI_IRQ_NUMBER      (16)
#else
#define BSP_PCI_IRQ_NUMBER      (0)
#endif
#define BSP_PCI_IRQ_LOWEST_OFFSET   (BSP_ISA_IRQ_NUMBER)
#define BSP_PCI_IRQ_MAX_OFFSET      (BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER - 1)

/*
 * PowerPC exceptions handled as interrupt where an RTEMS managed interrupt
 * handler might be connected
 */
#define BSP_PROCESSOR_IRQ_NUMBER    (1)
#define BSP_PROCESSOR_IRQ_LOWEST_OFFSET (BSP_PCI_IRQ_MAX_OFFSET + 1)
#define BSP_PROCESSOR_IRQ_MAX_OFFSET    (BSP_PROCESSOR_IRQ_LOWEST_OFFSET + BSP_PROCESSOR_IRQ_NUMBER - 1)
/* Misc vectors for OPENPIC irqs (IPI, timers)
 */
#ifndef qemu
#define BSP_MISC_IRQ_NUMBER     (8)
#else
#define BSP_MISC_IRQ_NUMBER     (0)
#endif

#define BSP_MISC_IRQ_LOWEST_OFFSET  (BSP_PROCESSOR_IRQ_MAX_OFFSET + 1)
#define BSP_MISC_IRQ_MAX_OFFSET     (BSP_MISC_IRQ_LOWEST_OFFSET + BSP_MISC_IRQ_NUMBER - 1)

#define BSP_IRQ_NUMBER          (BSP_MISC_IRQ_MAX_OFFSET + 1)
#define BSP_LOWEST_OFFSET       (BSP_ISA_IRQ_LOWEST_OFFSET)
#define BSP_MAX_OFFSET          (BSP_MISC_IRQ_MAX_OFFSET)

#define BSP_ISA_PERIODIC_TIMER          (0)
#define BSP_ISA_KEYBOARD            (1)
#define BSP_ISA_UART_COM2_IRQ       (3)
#define BSP_ISA_UART_COM1_IRQ       (4)
#define BSP_ISA_RT_TIMER1           (8)
#define BSP_ISA_RT_TIMER3       (10)

#define BSP_PCI_IRQ0            (BSP_PCI_IRQ_LOWEST_OFFSET)
#if     BSP_PCI_IRQ_NUMBER > 0
#define BSP_PCI_ISA_BRIDGE_IRQ      (BSP_PCI_IRQ0)
#endif

#if defined(mvme2100)
#define BSP_DEC21143_IRQ                (BSP_PCI_IRQ_LOWEST_OFFSET + 1)
#define BSP_PMC_PCMIP_TYPE1_SLOT0_IRQ   (BSP_PCI_IRQ_LOWEST_OFFSET + 2)
#define BSP_PCMIP_TYPE1_SLOT1_IRQ       (BSP_PCI_IRQ_LOWEST_OFFSET + 3)
#define BSP_PCMIP_TYPE2_SLOT0_IRQ       (BSP_PCI_IRQ_LOWEST_OFFSET + 4)
#define BSP_PCMIP_TYPE2_SLOT1_IRQ       (BSP_PCI_IRQ_LOWEST_OFFSET + 5)
#define BSP_PCI_INTA_UNIVERSE_LINT0_IRQ (BSP_PCI_IRQ_LOWEST_OFFSET + 7)
#define BSP_PCI_INTB_UNIVERSE_LINT1_IRQ (BSP_PCI_IRQ_LOWEST_OFFSET + 8)
#define BSP_PCI_INTC_UNIVERSE_LINT2_IRQ (BSP_PCI_IRQ_LOWEST_OFFSET + 9)
#define BSP_PCI_INTD_UNIVERSE_LINT3_IRQ (BSP_PCI_IRQ_LOWEST_OFFSET + 10)
#define BSP_UART_COM1_IRQ               (BSP_PCI_IRQ_LOWEST_OFFSET + 13)
#define BSP_FRONT_PANEL_ABORT_IRQ       (BSP_PCI_IRQ_LOWEST_OFFSET + 14)
#define BSP_RTC_IRQ                     (BSP_PCI_IRQ_LOWEST_OFFSET + 15)
#else
#define BSP_UART_COM1_IRQ       BSP_ISA_UART_COM1_IRQ
#define BSP_UART_COM2_IRQ       BSP_ISA_UART_COM2_IRQ
#endif

#define BSP_DECREMENTER         (BSP_PROCESSOR_IRQ_LOWEST_OFFSET)
#endif

typedef unsigned short rtems_i8259_masks;
extern  volatile rtems_i8259_masks i8259s_cache;

/*-------------------------------------------------------------------------+
| Function Prototypes.
+--------------------------------------------------------------------------*/
/*
 * ------------------------ Intel 8259 (or emulation) Mngt Routines -------
 */

void BSP_i8259s_init(void);

int BSP_irq_disable_at_i8259s        (const rtems_irq_number irqLine);

int BSP_irq_enable_at_i8259s        (const rtems_irq_number irqLine);

int BSP_irq_ack_at_i8259s               (const rtems_irq_number irqLine);

int BSP_irq_enabled_at_i8259s           (const rtems_irq_number irqLine);

int BSP_i8259s_int_process(void);

extern void BSP_rtems_irq_mng_init(unsigned cpuId);
extern void BSP_i8259s_init(void);

#ifdef __cplusplus
};
#endif

#endif
#endif