forked from Imagelibrary/rtems
4055e6f86f
* clock/.cvsignore, clock/Makefile.am, clock/p_clock.c, include/8xx_immap.h, include/commproc.h, irq/.cvsignore, irq/Makefile.am, irq/irq.c, irq/irq.h, irq/irq_asm.S, irq/irq_init.c, vectors/.cvsignore, vectors/Makefile.am, vectors/vectors.S, vectors/vectors.h, vectors/vectors_init.c: New file. * Switch the eth_comm BSP to use the "new exception processing model."
332 lines
12 KiB
C
332 lines
12 KiB
C
/* irq.h
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*
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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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*
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* CopyRight (C) 1999 valette@crf.canon.fr
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*
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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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*
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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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*
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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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* http://www.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#ifndef LIBBSP_POWERPC_ETH_COMM_IRQ_IRQ_H
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#define LIBBSP_POWERPC_ETH_COMM_IRQ_IRQ_H
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#define BSP_ASM_IRQ_VECTOR_BASE 0x0
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#ifndef ASM
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extern volatile unsigned int ppc_cached_irq_mask;
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/*
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* Symblolic IRQ names and related definitions.
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*/
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typedef enum {
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/* Base vector for our SIU IRQ handlers. */
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BSP_SIU_VECTOR_BASE = BSP_ASM_IRQ_VECTOR_BASE,
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/*
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* SIU IRQ handler related definitions
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*/
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BSP_SIU_IRQ_NUMBER = 16, /* 16 reserved but in the future... */
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BSP_SIU_IRQ_LOWEST_OFFSET = 0,
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BSP_SIU_IRQ_MAX_OFFSET = BSP_SIU_IRQ_LOWEST_OFFSET + BSP_SIU_IRQ_NUMBER - 1,
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/*
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* CPM IRQ handlers related definitions
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* CAUTION : BSP_CPM_IRQ_LOWEST_OFFSET should be equal to OPENPIC_VEC_SOURCE
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*/
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BSP_CPM_IRQ_NUMBER = 32,
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BSP_CPM_IRQ_LOWEST_OFFSET = BSP_SIU_IRQ_NUMBER + BSP_SIU_VECTOR_BASE,
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BSP_CPM_IRQ_MAX_OFFSET = BSP_CPM_IRQ_LOWEST_OFFSET + BSP_CPM_IRQ_NUMBER - 1,
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/*
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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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*/
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BSP_PROCESSOR_IRQ_NUMBER = 1,
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BSP_PROCESSOR_IRQ_LOWEST_OFFSET = BSP_CPM_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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/*
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* Summary
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*/
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BSP_IRQ_NUMBER = BSP_PROCESSOR_IRQ_MAX_OFFSET + 1,
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BSP_LOWEST_OFFSET = BSP_SIU_IRQ_LOWEST_OFFSET,
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BSP_MAX_OFFSET = BSP_PROCESSOR_IRQ_MAX_OFFSET,
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/*
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* Some SIU IRQ symbolic name definition. Please note that
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* INT IRQ are defined but a single one will be used to
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* redirect all CPM interrupt.
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*/
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BSP_SIU_EXT_IRQ_0 = 0,
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BSP_SIU_INT_IRQ_0 = 1,
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BSP_SIU_EXT_IRQ_1 = 2,
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BSP_SIU_INT_IRQ_1 = 3,
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BSP_SIU_EXT_IRQ_2 = 4,
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BSP_SIU_INT_IRQ_2 = 5,
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BSP_SIU_EXT_IRQ_3 = 6,
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BSP_SIU_INT_IRQ_3 = 7,
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BSP_SIU_EXT_IRQ_4 = 8,
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BSP_SIU_INT_IRQ_4 = 9,
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BSP_SIU_EXT_IRQ_5 = 10,
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BSP_SIU_INT_IRQ_5 = 11,
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BSP_SIU_EXT_IRQ_6 = 12,
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BSP_SIU_INT_IRQ_6 = 13,
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BSP_SIU_EXT_IRQ_7 = 14,
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BSP_SIU_INT_IRQ_7 = 15,
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/*
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* Symbolic name for CPM interrupt on SIU Internal level 2
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*/
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BSP_CPM_INTERRUPT = BSP_SIU_INT_IRQ_2,
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BSP_PERIODIC_TIMER = BSP_SIU_INT_IRQ_6,
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BSP_FAST_ETHERNET_CTRL = BSP_SIU_INT_IRQ_3,
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/*
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* Some CPM IRQ symbolic name definition
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*/
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BSP_CPM_IRQ_ERROR = BSP_CPM_IRQ_LOWEST_OFFSET,
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BSP_CPM_IRQ_PARALLEL_IO_PC4 = BSP_CPM_IRQ_LOWEST_OFFSET + 1,
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BSP_CPM_IRQ_PARALLEL_IO_PC5 = BSP_CPM_IRQ_LOWEST_OFFSET + 2,
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BSP_CPM_IRQ_SMC2_OR_PIP = BSP_CPM_IRQ_LOWEST_OFFSET + 3,
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BSP_CPM_IRQ_SMC1 = BSP_CPM_IRQ_LOWEST_OFFSET + 4,
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BSP_CPM_IRQ_SPI = BSP_CPM_IRQ_LOWEST_OFFSET + 5,
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BSP_CPM_IRQ_PARALLEL_IO_PC6 = BSP_CPM_IRQ_LOWEST_OFFSET + 6,
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BSP_CPM_IRQ_TIMER_4 = BSP_CPM_IRQ_LOWEST_OFFSET + 7,
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BSP_CPM_IRQ_PARALLEL_IO_PC7 = BSP_CPM_IRQ_LOWEST_OFFSET + 9,
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BSP_CPM_IRQ_PARALLEL_IO_PC8 = BSP_CPM_IRQ_LOWEST_OFFSET + 10,
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BSP_CPM_IRQ_PARALLEL_IO_PC9 = BSP_CPM_IRQ_LOWEST_OFFSET + 11,
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BSP_CPM_IRQ_TIMER_3 = BSP_CPM_IRQ_LOWEST_OFFSET + 12,
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BSP_CPM_IRQ_PARALLEL_IO_PC10 = BSP_CPM_IRQ_LOWEST_OFFSET + 14,
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BSP_CPM_IRQ_PARALLEL_IO_PC11 = BSP_CPM_IRQ_LOWEST_OFFSET + 15,
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BSP_CPM_I2C = BSP_CPM_IRQ_LOWEST_OFFSET + 16,
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BSP_CPM_RISC_TIMER_TABLE = BSP_CPM_IRQ_LOWEST_OFFSET + 17,
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BSP_CPM_IRQ_TIMER_2 = BSP_CPM_IRQ_LOWEST_OFFSET + 18,
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BSP_CPM_IDMA2 = BSP_CPM_IRQ_LOWEST_OFFSET + 20,
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BSP_CPM_IDMA1 = BSP_CPM_IRQ_LOWEST_OFFSET + 21,
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BSP_CPM_SDMA_CHANNEL_BUS_ERR = BSP_CPM_IRQ_LOWEST_OFFSET + 22,
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BSP_CPM_IRQ_PARALLEL_IO_PC12 = BSP_CPM_IRQ_LOWEST_OFFSET + 23,
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BSP_CPM_IRQ_PARALLEL_IO_PC13 = BSP_CPM_IRQ_LOWEST_OFFSET + 24,
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BSP_CPM_IRQ_TIMER_1 = BSP_CPM_IRQ_LOWEST_OFFSET + 25,
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BSP_CPM_IRQ_PARALLEL_IO_PC14 = BSP_CPM_IRQ_LOWEST_OFFSET + 26,
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BSP_CPM_IRQ_SCC4 = BSP_CPM_IRQ_LOWEST_OFFSET + 27,
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BSP_CPM_IRQ_SCC3 = BSP_CPM_IRQ_LOWEST_OFFSET + 28,
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BSP_CPM_IRQ_SCC2 = BSP_CPM_IRQ_LOWEST_OFFSET + 29,
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BSP_CPM_IRQ_SCC1 = BSP_CPM_IRQ_LOWEST_OFFSET + 30,
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BSP_CPM_IRQ_PARALLEL_IO_PC15 = BSP_CPM_IRQ_LOWEST_OFFSET + 31,
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/*
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* Some Processor exception handled as rtems IRQ symbolic name definition
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*/
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BSP_DECREMENTER = BSP_PROCESSOR_IRQ_LOWEST_OFFSET
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}rtems_irq_symbolic_name;
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#define CPM_INTERRUPT
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/*
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* Type definition for RTEMS managed interrupts
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*/
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typedef unsigned char rtems_irq_prio;
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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_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 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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/*
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* IRQ line
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*/
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rtems_irq_symbolic_name name;
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/*
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* handler. See comment on handler properties below in function prototype.
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*/
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rtems_irq_hdl hdl;
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/*
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* function for enabling interrupts at device level (ONLY!).
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* The BSP code will automatically enable it at SIU level and CPM level.
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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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* RTEMS may well need such a function when restoring normal interrupt
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* processing after a debug session.
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*
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*/
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rtems_irq_enable on;
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/*
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* function for disabling interrupts at device level (ONLY!).
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* The code will disable it at SIU and CPM level. RATIONALE : anyway
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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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* 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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*/
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rtems_irq_disable off;
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/*
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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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*/
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rtems_irq_is_enabled isOn;
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}rtems_irq_connect_data;
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typedef struct {
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/*
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* size of all the table fields (*Tbl) described below.
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*/
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unsigned int irqNb;
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/*
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* Default handler used when disconnecting interrupts.
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*/
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rtems_irq_connect_data defaultEntry;
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/*
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* Table containing initials/current value.
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*/
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rtems_irq_connect_data* irqHdlTbl;
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/*
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* actual value of BSP_SIU_IRQ_VECTOR_BASE...
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*/
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rtems_irq_symbolic_name irqBase;
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/*
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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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* 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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* The interrupt source will be physically masked at i8259 level.
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*/
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rtems_irq_prio* irqPrioTbl;
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}rtems_irq_global_settings;
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/*-------------------------------------------------------------------------+
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| Function Prototypes.
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+--------------------------------------------------------------------------*/
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/*
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* ------------------------ PPC SIU Mngt Routines -------
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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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* 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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*/
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int BSP_irq_disable_at_siu (const rtems_irq_symbolic_name irqLine);
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/*
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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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* be propagated further to the processor
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*/
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int BSP_irq_enable_at_siu (const rtems_irq_symbolic_name irqLine);
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/*
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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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* 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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* handlers.
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*/
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int BSP_irq_ack_at_siu (const rtems_irq_symbolic_name irqLine);
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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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*/
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int BSP_irq_enabled_at_siu (const rtems_irq_symbolic_name irqLine);
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/*
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* ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
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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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* 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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*
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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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* 4) modify them to disable the current interrupt at SIU level (and may
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* be others depending on software priorities)
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* 5) aknowledge the SIU',
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* 6) demask the processor,
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* 7) call the application handler
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*
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* As a result the hdl function provided
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*
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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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* 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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* the device level including (aknowledging/re-enabling the interrupt at device,
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* level, getting the data,...)
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*
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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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*
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* 1) masks the interrupts again,
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* 2) restore the original SIU interrupt masks
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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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* 5) restore the C scratch registers...
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* 6) restore initial execution flow
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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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/*
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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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*/
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int BSP_get_current_rtems_irq_handler (rtems_irq_connect_data* ptr);
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/*
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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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* 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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/*
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* ------------------------ RTEMS Global Irq Handler Mngt Routines ----------------
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*/
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/*
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* (Re) Initialize the RTEMS interrupt management.
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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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* handler (config->irqHdlTbl[i].hdl) different from "config->defaultEntry.hdl"
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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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* And each handler currently equal to config->defaultEntry.hdl
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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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*
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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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*
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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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* 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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*/
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int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config);
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/*
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* (Re) get info on current RTEMS interrupt management.
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*/
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int BSP_rtems_irq_mngt_get(rtems_irq_global_settings**);
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extern void BSP_rtems_irq_mng_init(unsigned cpuId);
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#endif
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#endif
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