/* irq.h
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/* irq.h
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*
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*
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* This include file describe the data structure and the functions implemented
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* This include file describe the data structure and the functions implemented
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* by rtems to write interrupt handlers.
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* by rtems to write interrupt handlers.
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*
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*
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* CopyRight (C) 1999 valette@crf.canon.fr
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* CopyRight (C) 1999 valette@crf.canon.fr
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*
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*
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* This code is heavilly inspired by the public specification of STREAM V2
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* This code is heavilly inspired by the public specification of STREAM V2
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* that can be found at :
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* that can be found at :
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*
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*
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* <http://www.chorus.com/Documentation/index.html> by following
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* <http://www.chorus.com/Documentation/index.html> by following
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* the STREAM API Specification Document link.
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* the STREAM API Specification Document link.
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*
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*
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* The license and distribution terms for this file may be
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* The license and distribution terms for this file may be
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* found in found in the file LICENSE in this distribution or at
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* found in found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* $Id: irq.h,v 1.2 2001-09-27 12:01:06 chris Exp $
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* $Id: irq.h,v 1.2 2001-09-27 12:01:06 chris Exp $
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*/
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*/
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#ifndef LIBBSP_POWERPC_MCP750_IRQ_IRQ_H
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#ifndef LIBBSP_POWERPC_MCP750_IRQ_IRQ_H
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#define LIBBSP_POWERPC_MCP750_IRQ_IRQ_H
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#define LIBBSP_POWERPC_MCP750_IRQ_IRQ_H
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/*
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/*
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* 8259 edge/level control definitions at VIA
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* 8259 edge/level control definitions at VIA
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*/
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*/
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#define ISA8259_M_ELCR 0x4d0
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#define ISA8259_M_ELCR 0x4d0
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#define ISA8259_S_ELCR 0x4d1
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#define ISA8259_S_ELCR 0x4d1
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#define ELCRS_INT15_LVL 0x80
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#define ELCRS_INT15_LVL 0x80
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#define ELCRS_INT14_LVL 0x40
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#define ELCRS_INT14_LVL 0x40
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#define ELCRS_INT13_LVL 0x20
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#define ELCRS_INT13_LVL 0x20
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#define ELCRS_INT12_LVL 0x10
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#define ELCRS_INT12_LVL 0x10
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#define ELCRS_INT11_LVL 0x08
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#define ELCRS_INT11_LVL 0x08
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#define ELCRS_INT10_LVL 0x04
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#define ELCRS_INT10_LVL 0x04
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#define ELCRS_INT9_LVL 0x02
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#define ELCRS_INT9_LVL 0x02
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#define ELCRS_INT8_LVL 0x01
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#define ELCRS_INT8_LVL 0x01
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#define ELCRM_INT7_LVL 0x80
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#define ELCRM_INT7_LVL 0x80
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#define ELCRM_INT6_LVL 0x40
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#define ELCRM_INT6_LVL 0x40
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#define ELCRM_INT5_LVL 0x20
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#define ELCRM_INT5_LVL 0x20
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#define ELCRM_INT4_LVL 0x10
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#define ELCRM_INT4_LVL 0x10
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#define ELCRM_INT3_LVL 0x8
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#define ELCRM_INT3_LVL 0x8
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#define ELCRM_INT2_LVL 0x4
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#define ELCRM_INT2_LVL 0x4
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#define ELCRM_INT1_LVL 0x2
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#define ELCRM_INT1_LVL 0x2
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#define ELCRM_INT0_LVL 0x1
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#define ELCRM_INT0_LVL 0x1
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#define BSP_ASM_IRQ_VECTOR_BASE 0x0
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#define BSP_ASM_IRQ_VECTOR_BASE 0x0
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/* PIC's command and mask registers */
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/* PIC's command and mask registers */
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#define PIC_MASTER_COMMAND_IO_PORT 0x20 /* Master PIC command register */
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#define PIC_MASTER_COMMAND_IO_PORT 0x20 /* Master PIC command register */
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#define PIC_SLAVE_COMMAND_IO_PORT 0xa0 /* Slave PIC command register */
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#define PIC_SLAVE_COMMAND_IO_PORT 0xa0 /* Slave PIC command register */
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#define PIC_MASTER_IMR_IO_PORT 0x21 /* Master PIC Interrupt Mask Register */
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#define PIC_MASTER_IMR_IO_PORT 0x21 /* Master PIC Interrupt Mask Register */
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#define PIC_SLAVE_IMR_IO_PORT 0xa1 /* Slave PIC Interrupt Mask Register */
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#define PIC_SLAVE_IMR_IO_PORT 0xa1 /* Slave PIC Interrupt Mask Register */
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/* Command for specific EOI (End Of Interrupt): Interrupt acknowledge */
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/* Command for specific EOI (End Of Interrupt): Interrupt acknowledge */
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#define PIC_EOSI 0x60 /* End of Specific Interrupt (EOSI) */
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#define PIC_EOSI 0x60 /* End of Specific Interrupt (EOSI) */
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#define SLAVE_PIC_EOSI 0x62 /* End of Specific Interrupt (EOSI) for cascade */
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#define SLAVE_PIC_EOSI 0x62 /* End of Specific Interrupt (EOSI) for cascade */
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#define PIC_EOI 0x20 /* Generic End of Interrupt (EOI) */
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#define PIC_EOI 0x20 /* Generic End of Interrupt (EOI) */
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#ifndef ASM
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#ifndef ASM
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/*
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/*
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* Symblolic IRQ names and related definitions.
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* Symblolic IRQ names and related definitions.
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*/
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*/
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typedef enum {
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typedef enum {
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/* Base vector for our ISA IRQ handlers. */
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/* Base vector for our ISA IRQ handlers. */
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BSP_ISA_IRQ_VECTOR_BASE = BSP_ASM_IRQ_VECTOR_BASE,
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BSP_ISA_IRQ_VECTOR_BASE = BSP_ASM_IRQ_VECTOR_BASE,
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/*
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/*
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* ISA IRQ handler related definitions
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* ISA IRQ handler related definitions
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*/
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*/
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BSP_ISA_IRQ_NUMBER = 16,
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BSP_ISA_IRQ_NUMBER = 16,
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BSP_ISA_IRQ_LOWEST_OFFSET = 0,
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BSP_ISA_IRQ_LOWEST_OFFSET = 0,
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BSP_ISA_IRQ_MAX_OFFSET = BSP_ISA_IRQ_LOWEST_OFFSET + BSP_ISA_IRQ_NUMBER - 1,
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BSP_ISA_IRQ_MAX_OFFSET = BSP_ISA_IRQ_LOWEST_OFFSET + BSP_ISA_IRQ_NUMBER - 1,
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/*
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/*
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* PCI IRQ handlers related definitions
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* PCI IRQ handlers related definitions
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* CAUTION : BSP_PCI_IRQ_LOWEST_OFFSET should be equal to OPENPIC_VEC_SOURCE
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* CAUTION : BSP_PCI_IRQ_LOWEST_OFFSET should be equal to OPENPIC_VEC_SOURCE
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*/
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*/
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BSP_PCI_IRQ_NUMBER = 16,
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BSP_PCI_IRQ_NUMBER = 16,
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BSP_PCI_IRQ_LOWEST_OFFSET = BSP_ISA_IRQ_NUMBER,
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BSP_PCI_IRQ_LOWEST_OFFSET = BSP_ISA_IRQ_NUMBER,
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BSP_PCI_IRQ_MAX_OFFSET = BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER - 1,
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BSP_PCI_IRQ_MAX_OFFSET = BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER - 1,
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/*
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/*
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* PowerPc exceptions handled as interrupt where a rtems managed interrupt
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* PowerPc exceptions handled as interrupt where a rtems managed interrupt
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* handler might be connected
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* handler might be connected
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*/
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*/
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BSP_PROCESSOR_IRQ_NUMBER = 1,
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BSP_PROCESSOR_IRQ_NUMBER = 1,
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BSP_PROCESSOR_IRQ_LOWEST_OFFSET = BSP_PCI_IRQ_MAX_OFFSET + 1,
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BSP_PROCESSOR_IRQ_LOWEST_OFFSET = BSP_PCI_IRQ_MAX_OFFSET + 1,
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BSP_PROCESSOR_IRQ_MAX_OFFSET = BSP_PROCESSOR_IRQ_LOWEST_OFFSET + BSP_PROCESSOR_IRQ_NUMBER - 1,
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BSP_PROCESSOR_IRQ_MAX_OFFSET = BSP_PROCESSOR_IRQ_LOWEST_OFFSET + BSP_PROCESSOR_IRQ_NUMBER - 1,
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/*
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/*
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* Summary
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* Summary
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*/
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*/
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BSP_IRQ_NUMBER = BSP_PROCESSOR_IRQ_MAX_OFFSET + 1,
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BSP_IRQ_NUMBER = BSP_PROCESSOR_IRQ_MAX_OFFSET + 1,
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BSP_LOWEST_OFFSET = BSP_ISA_IRQ_LOWEST_OFFSET,
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BSP_LOWEST_OFFSET = BSP_ISA_IRQ_LOWEST_OFFSET,
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BSP_MAX_OFFSET = BSP_PROCESSOR_IRQ_MAX_OFFSET,
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BSP_MAX_OFFSET = BSP_PROCESSOR_IRQ_MAX_OFFSET,
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/*
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/*
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* Some ISA IRQ symbolic name definition
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* Some ISA IRQ symbolic name definition
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*/
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*/
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BSP_ISA_PERIODIC_TIMER = 0,
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BSP_ISA_PERIODIC_TIMER = 0,
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BSP_ISA_KEYBOARD = 1,
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BSP_ISA_KEYBOARD = 1,
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BSP_ISA_UART_COM2_IRQ = 3,
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BSP_ISA_UART_COM2_IRQ = 3,
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BSP_ISA_UART_COM1_IRQ = 4,
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BSP_ISA_UART_COM1_IRQ = 4,
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BSP_ISA_RT_TIMER1 = 8,
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BSP_ISA_RT_TIMER1 = 8,
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BSP_ISA_RT_TIMER3 = 10,
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BSP_ISA_RT_TIMER3 = 10,
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/*
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/*
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* Some PCI IRQ symbolic name definition
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* Some PCI IRQ symbolic name definition
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*/
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*/
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BSP_PCI_IRQ0 = BSP_PCI_IRQ_LOWEST_OFFSET,
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BSP_PCI_IRQ0 = BSP_PCI_IRQ_LOWEST_OFFSET,
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BSP_PCI_ISA_BRIDGE_IRQ = BSP_PCI_IRQ0,
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BSP_PCI_ISA_BRIDGE_IRQ = BSP_PCI_IRQ0,
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/*
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/*
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* Some Processor execption handled as rtems IRQ symbolic name definition
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* Some Processor execption handled as rtems IRQ symbolic name definition
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*/
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*/
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BSP_DECREMENTER = BSP_PROCESSOR_IRQ_LOWEST_OFFSET
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BSP_DECREMENTER = BSP_PROCESSOR_IRQ_LOWEST_OFFSET
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}rtems_irq_symbolic_name;
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}rtems_irq_symbolic_name;
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/*
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/*
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* Type definition for RTEMS managed interrupts
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* Type definition for RTEMS managed interrupts
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*/
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*/
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typedef unsigned char rtems_irq_prio;
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typedef unsigned char rtems_irq_prio;
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typedef unsigned short rtems_i8259_masks;
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typedef unsigned short rtems_i8259_masks;
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extern volatile rtems_i8259_masks i8259s_cache;
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extern volatile rtems_i8259_masks i8259s_cache;
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struct __rtems_irq_connect_data__; /* forward declaratiuon */
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struct __rtems_irq_connect_data__; /* forward declaratiuon */
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typedef void (*rtems_irq_hdl) (void);
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typedef void (*rtems_irq_hdl) (void);
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typedef void (*rtems_irq_enable) (const struct __rtems_irq_connect_data__*);
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typedef void (*rtems_irq_enable) (const struct __rtems_irq_connect_data__*);
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typedef void (*rtems_irq_disable) (const struct __rtems_irq_connect_data__*);
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typedef void (*rtems_irq_disable) (const struct __rtems_irq_connect_data__*);
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typedef int (*rtems_irq_is_enabled) (const struct __rtems_irq_connect_data__*);
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typedef int (*rtems_irq_is_enabled) (const struct __rtems_irq_connect_data__*);
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typedef struct __rtems_irq_connect_data__ {
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typedef struct __rtems_irq_connect_data__ {
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/*
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/*
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* IRQ line
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* IRQ line
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*/
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*/
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rtems_irq_symbolic_name name;
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rtems_irq_symbolic_name name;
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/*
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/*
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* handler. See comment on handler properties below in function prototype.
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* handler. See comment on handler properties below in function prototype.
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*/
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*/
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rtems_irq_hdl hdl;
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rtems_irq_hdl hdl;
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/*
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/*
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* function for enabling interrupts at device level (ONLY!).
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* function for enabling interrupts at device level (ONLY!).
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* The BSP code will automatically enable it at i8259s level and openpic level.
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* The BSP code will automatically enable it at i8259s level and openpic level.
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* RATIONALE : anyway such code has to exist in current driver code.
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* RATIONALE : anyway such code has to exist in current driver code.
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* It is usually called immediately AFTER connecting the interrupt handler.
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* It is usually called immediately AFTER connecting the interrupt handler.
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* RTEMS may well need such a function when restoring normal interrupt
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* RTEMS may well need such a function when restoring normal interrupt
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* processing after a debug session.
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* processing after a debug session.
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*
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*
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*/
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*/
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rtems_irq_enable on;
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rtems_irq_enable on;
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/*
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/*
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* function for disabling interrupts at device level (ONLY!).
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* function for disabling interrupts at device level (ONLY!).
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* The code will disable it at i8259s level. RATIONALE : anyway
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* The code will disable it at i8259s level. RATIONALE : anyway
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* such code has to exist for clean shutdown. It is usually called
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* such code has to exist for clean shutdown. It is usually called
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* BEFORE disconnecting the interrupt. RTEMS may well need such
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* BEFORE disconnecting the interrupt. RTEMS may well need such
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* a function when disabling normal interrupt processing for
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* a function when disabling normal interrupt processing for
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* a debug session. May well be a NOP function.
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* a debug session. May well be a NOP function.
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*/
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*/
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rtems_irq_disable off;
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rtems_irq_disable off;
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/*
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/*
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* function enabling to know what interrupt may currently occur
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* function enabling to know what interrupt may currently occur
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* if someone manipulates the i8259s interrupt mask without care...
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* if someone manipulates the i8259s interrupt mask without care...
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*/
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*/
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rtems_irq_is_enabled isOn;
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rtems_irq_is_enabled isOn;
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}rtems_irq_connect_data;
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}rtems_irq_connect_data;
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typedef struct {
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typedef struct {
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/*
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/*
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* size of all the table fields (*Tbl) described below.
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* size of all the table fields (*Tbl) described below.
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*/
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*/
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unsigned int irqNb;
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unsigned int irqNb;
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/*
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/*
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* Default handler used when disconnecting interrupts.
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* Default handler used when disconnecting interrupts.
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*/
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*/
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rtems_irq_connect_data defaultEntry;
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rtems_irq_connect_data defaultEntry;
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/*
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/*
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* Table containing initials/current value.
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* Table containing initials/current value.
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*/
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*/
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rtems_irq_connect_data* irqHdlTbl;
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rtems_irq_connect_data* irqHdlTbl;
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/*
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/*
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* actual value of BSP_ISA_IRQ_VECTOR_BASE...
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* actual value of BSP_ISA_IRQ_VECTOR_BASE...
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*/
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*/
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rtems_irq_symbolic_name irqBase;
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rtems_irq_symbolic_name irqBase;
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/*
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/*
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* software priorities associated with interrupts.
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* software priorities associated with interrupts.
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* if irqPrio [i] > intrPrio [j] it means that
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* if irqPrio [i] > intrPrio [j] it means that
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* interrupt handler hdl connected for interrupt name i
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* interrupt handler hdl connected for interrupt name i
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* will not be interrupted by the handler connected for interrupt j
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* will not be interrupted by the handler connected for interrupt j
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* The interrupt source will be physically masked at i8259 level.
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* The interrupt source will be physically masked at i8259 level.
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*/
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*/
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rtems_irq_prio* irqPrioTbl;
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rtems_irq_prio* irqPrioTbl;
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}rtems_irq_global_settings;
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}rtems_irq_global_settings;
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/*-------------------------------------------------------------------------+
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/*-------------------------------------------------------------------------+
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| Function Prototypes.
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| Function Prototypes.
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+--------------------------------------------------------------------------*/
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+--------------------------------------------------------------------------*/
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/*
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/*
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* ------------------------ Intel 8259 (or emulation) Mngt Routines -------
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* ------------------------ Intel 8259 (or emulation) Mngt Routines -------
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*/
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*/
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/*
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/*
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* function to disable a particular irq at 8259 level. After calling
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* function to disable a particular irq at 8259 level. After calling
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* this function, even if the device asserts the interrupt line it will
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* this function, even if the device asserts the interrupt line it will
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* not be propagated further to the processor
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* not be propagated further to the processor
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*/
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*/
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int BSP_irq_disable_at_i8259s (const rtems_irq_symbolic_name irqLine);
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int BSP_irq_disable_at_i8259s (const rtems_irq_symbolic_name irqLine);
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/*
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/*
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* function to enable a particular irq at 8259 level. After calling
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* function to enable a particular irq at 8259 level. After calling
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* this function, if the device asserts the interrupt line it will
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* this function, if the device asserts the interrupt line it will
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* be propagated further to the processor
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* be propagated further to the processor
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*/
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*/
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int BSP_irq_enable_at_i8259s (const rtems_irq_symbolic_name irqLine);
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int BSP_irq_enable_at_i8259s (const rtems_irq_symbolic_name irqLine);
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/*
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/*
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* function to acknoledge a particular irq at 8259 level. After calling
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* function to acknoledge a particular irq at 8259 level. After calling
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* this function, if a device asserts an enabled interrupt line it will
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* this function, if a device asserts an enabled interrupt line it will
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* be propagated further to the processor. Mainly usefull for people
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* be propagated further to the processor. Mainly usefull for people
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* writting raw handlers as this is automagically done for rtems managed
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* writting raw handlers as this is automagically done for rtems managed
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* handlers.
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* handlers.
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*/
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*/
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int BSP_irq_ack_at_i8259s (const rtems_irq_symbolic_name irqLine);
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int BSP_irq_ack_at_i8259s (const rtems_irq_symbolic_name irqLine);
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/*
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/*
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* function to check if a particular irq is enabled at 8259 level. After calling
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* function to check if a particular irq is enabled at 8259 level. After calling
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*/
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*/
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int BSP_irq_enabled_at_i8259s (const rtems_irq_symbolic_name irqLine);
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int BSP_irq_enabled_at_i8259s (const rtems_irq_symbolic_name irqLine);
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/*
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/*
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* ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
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* ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
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*/
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*/
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/*
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/*
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* function to connect a particular irq handler. This hanlder will NOT be called
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* function to connect a particular irq handler. This hanlder will NOT be called
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* directly as the result of the corresponding interrupt. Instead, a RTEMS
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* directly as the result of the corresponding interrupt. Instead, a RTEMS
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* irq prologue will be called that will :
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* irq prologue will be called that will :
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*
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*
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* 1) save the C scratch registers,
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* 1) save the C scratch registers,
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* 2) switch to a interrupt stack if the interrupt is not nested,
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* 2) switch to a interrupt stack if the interrupt is not nested,
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* 3) store the current i8259s' interrupt masks
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* 3) store the current i8259s' interrupt masks
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* 4) modify them to disable the current interrupt at 8259 level (and may
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* 4) modify them to disable the current interrupt at 8259 level (and may
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* be others depending on software priorities)
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* be others depending on software priorities)
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* 5) aknowledge the i8259s',
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* 5) aknowledge the i8259s',
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* 6) demask the processor,
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* 6) demask the processor,
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* 7) call the application handler
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* 7) call the application handler
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*
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*
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* As a result the hdl function provided
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* As a result the hdl function provided
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*
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*
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* a) can perfectly be written is C,
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* a) can perfectly be written is C,
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* b) may also well directly call the part of the RTEMS API that can be used
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* b) may also well directly call the part of the RTEMS API that can be used
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* from interrupt level,
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* from interrupt level,
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* c) It only responsible for handling the jobs that need to be done at
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* c) It only responsible for handling the jobs that need to be done at
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* the device level including (aknowledging/re-enabling the interrupt at device,
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* the device level including (aknowledging/re-enabling the interrupt at device,
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* level, getting the data,...)
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* level, getting the data,...)
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*
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*
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* When returning from the function, the following will be performed by
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* When returning from the function, the following will be performed by
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* the RTEMS irq epilogue :
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* the RTEMS irq epilogue :
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*
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*
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* 1) masks the interrupts again,
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* 1) masks the interrupts again,
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* 2) restore the original i8259s' interrupt masks
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* 2) restore the original i8259s' interrupt masks
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* 3) switch back on the orinal stack if needed,
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* 3) switch back on the orinal stack if needed,
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* 4) perform rescheduling when necessary,
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* 4) perform rescheduling when necessary,
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* 5) restore the C scratch registers...
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* 5) restore the C scratch registers...
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* 6) restore initial execution flow
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* 6) restore initial execution flow
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*
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*
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*/
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*/
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int BSP_install_rtems_irq_handler (const rtems_irq_connect_data*);
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int BSP_install_rtems_irq_handler (const rtems_irq_connect_data*);
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/*
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/*
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* function to get the current RTEMS irq handler for ptr->name. It enables to
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* function to get the current RTEMS irq handler for ptr->name. It enables to
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* define hanlder chain...
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* define hanlder chain...
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*/
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*/
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int BSP_get_current_rtems_irq_handler (rtems_irq_connect_data* ptr);
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int BSP_get_current_rtems_irq_handler (rtems_irq_connect_data* ptr);
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/*
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/*
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* function to get disconnect the RTEMS irq handler for ptr->name.
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* function to get disconnect the RTEMS irq handler for ptr->name.
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* This function checks that the value given is the current one for safety reason.
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* This function checks that the value given is the current one for safety reason.
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* The user can use the previous function to get it.
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* The user can use the previous function to get it.
|
*/
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*/
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int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data*);
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int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data*);
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/*
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/*
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* ------------------------ RTEMS Global Irq Handler Mngt Routines ----------------
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* ------------------------ RTEMS Global Irq Handler Mngt Routines ----------------
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*/
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*/
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/*
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/*
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* (Re) Initialize the RTEMS interrupt management.
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* (Re) Initialize the RTEMS interrupt management.
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*
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*
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* The result of calling this function will be the same as if each individual
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* The result of calling this function will be the same as if each individual
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* handler (config->irqHdlTbl[i].hdl) different from "config->defaultEntry.hdl"
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* handler (config->irqHdlTbl[i].hdl) different from "config->defaultEntry.hdl"
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* has been individualy connected via
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* has been individualy connected via
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* BSP_install_rtems_irq_handler(&config->irqHdlTbl[i])
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* BSP_install_rtems_irq_handler(&config->irqHdlTbl[i])
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* And each handler currently equal to config->defaultEntry.hdl
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* And each handler currently equal to config->defaultEntry.hdl
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* has been previously disconnected via
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* has been previously disconnected via
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* BSP_remove_rtems_irq_handler (&config->irqHdlTbl[i])
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* BSP_remove_rtems_irq_handler (&config->irqHdlTbl[i])
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*
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*
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* This is to say that all information given will be used and not just
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* This is to say that all information given will be used and not just
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* only the space.
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* only the space.
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*
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*
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* CAUTION : the various table address contained in config will be used
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* CAUTION : the various table address contained in config will be used
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* directly by the interrupt mangement code in order to save
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* directly by the interrupt mangement code in order to save
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* data size so they must stay valid after the call => they should
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* data size so they must stay valid after the call => they should
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* not be modified or declared on a stack.
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* not be modified or declared on a stack.
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*/
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*/
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int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config);
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int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config);
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/*
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/*
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* (Re) get info on current RTEMS interrupt management.
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* (Re) get info on current RTEMS interrupt management.
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*/
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*/
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int BSP_rtems_irq_mngt_get(rtems_irq_global_settings**);
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int BSP_rtems_irq_mngt_get(rtems_irq_global_settings**);
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|
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extern void BSP_rtems_irq_mng_init(unsigned cpuId);
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extern void BSP_rtems_irq_mng_init(unsigned cpuId);
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extern void BSP_i8259s_init(void);
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extern void BSP_i8259s_init(void);
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#endif
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#endif
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#endif
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#endif
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