summaryrefslogtreecommitdiffstats
path: root/c/src/lib/libbsp/powerpc/mcp750/irq/irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mcp750/irq/irq.c')
-rw-r--r--c/src/lib/libbsp/powerpc/mcp750/irq/irq.c398
1 files changed, 0 insertions, 398 deletions
diff --git a/c/src/lib/libbsp/powerpc/mcp750/irq/irq.c b/c/src/lib/libbsp/powerpc/mcp750/irq/irq.c
deleted file mode 100644
index 4c2226a48f..0000000000
--- a/c/src/lib/libbsp/powerpc/mcp750/irq/irq.c
+++ /dev/null
@@ -1,398 +0,0 @@
-/*
- *
- * This file contains the implementation of the function described in irq.h
- *
- * Copyright (C) 1998, 1999 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.
- *
- * $Id$
- */
-
-#include <bsp.h>
-#include <bsp/irq.h>
-#include <bsp/openpic.h>
-#include <rtems/score/thread.h>
-#include <rtems/score/apiext.h>
-#include <libcpu/raw_exception.h>
-#include <bsp/vectors.h>
-#include <libcpu/cpu.h>
-
-#define RAVEN_INTR_ACK_REG 0xfeff0030
-
-/*
- * pointer to the mask representing the additionnal irq vectors
- * that must be disabled when a particular entry is activated.
- * They will be dynamically computed from teh prioruty table given
- * in BSP_rtems_irq_mngt_set();
- * CAUTION : this table is accessed directly by interrupt routine
- * prologue.
- */
-rtems_i8259_masks irq_mask_or_tbl[BSP_IRQ_NUMBER];
-/*
- * default handler connected on each irq after bsp initialization
- */
-static rtems_irq_connect_data default_rtems_entry;
-
-/*
- * location used to store initial tables used for interrupt
- * management.
- */
-static rtems_irq_global_settings* internal_config;
-static rtems_irq_connect_data* rtems_hdl_tbl;
-
-/*
- * Check if IRQ is an ISA IRQ
- */
-static inline int is_isa_irq(const rtems_irq_symbolic_name irqLine)
-{
- return (((int) irqLine <= BSP_ISA_IRQ_MAX_OFFSET) &
- ((int) irqLine >= BSP_ISA_IRQ_LOWEST_OFFSET)
- );
-}
-
-/*
- * Check if IRQ is an OPENPIC IRQ
- */
-static inline int is_pci_irq(const rtems_irq_symbolic_name irqLine)
-{
- return (((int) irqLine <= BSP_PCI_IRQ_MAX_OFFSET) &
- ((int) irqLine >= BSP_PCI_IRQ_LOWEST_OFFSET)
- );
-}
-
-/*
- * Check if IRQ is a Porcessor IRQ
- */
-static inline int is_processor_irq(const rtems_irq_symbolic_name irqLine)
-{
- return (((int) irqLine <= BSP_PROCESSOR_IRQ_MAX_OFFSET) &
- ((int) irqLine >= BSP_PROCESSOR_IRQ_LOWEST_OFFSET)
- );
-}
-
-
-/*
- * ------------------------ RTEMS Irq helper functions ----------------
- */
-
-/*
- * Caution : this function assumes the variable "internal_config"
- * is already set and that the tables it contains are still valid
- * and accessible.
- */
-static void compute_i8259_masks_from_prio ()
-{
- unsigned int i;
- unsigned int j;
- /*
- * Always mask at least current interrupt to prevent re-entrance
- */
- for (i=BSP_ISA_IRQ_LOWEST_OFFSET; i < BSP_ISA_IRQ_NUMBER; i++) {
- * ((unsigned short*) &irq_mask_or_tbl[i]) = (1 << i);
- for (j = BSP_ISA_IRQ_LOWEST_OFFSET; j < BSP_ISA_IRQ_NUMBER; j++) {
- /*
- * Mask interrupts at i8259 level that have a lower priority
- */
- if (internal_config->irqPrioTbl [i] > internal_config->irqPrioTbl [j]) {
- * ((unsigned short*) &irq_mask_or_tbl[i]) |= (1 << j);
- }
- }
- }
-}
-
-/*
- * This function check that the value given for the irq line
- * is valid.
- */
-
-static int isValidInterrupt(int irq)
-{
- if ( (irq < BSP_LOWEST_OFFSET) || (irq > BSP_MAX_OFFSET))
- return 0;
- return 1;
-}
-
-/*
- * ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
- */
-
-int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq)
-{
- unsigned int level;
-
- if (!isValidInterrupt(irq->name)) {
- return 0;
- }
- /*
- * Check if default handler is actually connected. If not issue an error.
- * You must first get the current handler via i386_get_current_idt_entry
- * and then disconnect it using i386_delete_idt_entry.
- * RATIONALE : to always have the same transition by forcing the user
- * to get the previous handler before accepting to disconnect.
- */
- if (rtems_hdl_tbl[irq->name].hdl != default_rtems_entry.hdl) {
- return 0;
- }
- _CPU_ISR_Disable(level);
-
- /*
- * store the data provided by user
- */
- rtems_hdl_tbl[irq->name] = *irq;
-
- if (is_isa_irq(irq->name)) {
- /*
- * Enable interrupt at PIC level
- */
- BSP_irq_enable_at_i8259s (irq->name);
- }
-
- if (is_pci_irq(irq->name)) {
- /*
- * Enable interrupt at OPENPIC level
- */
- openpic_enable_irq ((int) irq->name - BSP_PCI_IRQ_LOWEST_OFFSET);
- }
-
- if (is_processor_irq(irq->name)) {
- /*
- * Enable exception at processor level
- */
- }
- /*
- * Enable interrupt on device
- */
- irq->on(irq);
-
- _CPU_ISR_Enable(level);
-
- return 1;
-}
-
-
-int BSP_get_current_rtems_irq_handler (rtems_irq_connect_data* irq)
-{
- if (!isValidInterrupt(irq->name)) {
- return 0;
- }
- *irq = rtems_hdl_tbl[irq->name];
- return 1;
-}
-
-int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq)
-{
- unsigned int level;
-
- if (!isValidInterrupt(irq->name)) {
- return 0;
- }
- /*
- * Check if default handler is actually connected. If not issue an error.
- * You must first get the current handler via i386_get_current_idt_entry
- * and then disconnect it using i386_delete_idt_entry.
- * RATIONALE : to always have the same transition by forcing the user
- * to get the previous handler before accepting to disconnect.
- */
- if (rtems_hdl_tbl[irq->name].hdl != irq->hdl) {
- return 0;
- }
- _CPU_ISR_Disable(level);
-
- if (is_isa_irq(irq->name)) {
- /*
- * disable interrupt at PIC level
- */
- BSP_irq_disable_at_i8259s (irq->name);
- }
- if (is_pci_irq(irq->name)) {
- /*
- * disable interrupt at OPENPIC level
- */
- openpic_disable_irq ((int) irq->name - BSP_PCI_IRQ_LOWEST_OFFSET);
- }
- if (is_processor_irq(irq->name)) {
- /*
- * disable exception at processor level
- */
- }
-
- /*
- * Disable interrupt on device
- */
- irq->off(irq);
-
- /*
- * restore the default irq value
- */
- rtems_hdl_tbl[irq->name] = default_rtems_entry;
-
- _CPU_ISR_Enable(level);
-
- return 1;
-}
-
-/*
- * ------------------------ RTEMS Global Irq Handler Mngt Routines ----------------
- */
-
-int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config)
-{
- int i;
- unsigned int level;
- /*
- * Store various code accelerators
- */
- internal_config = config;
- default_rtems_entry = config->defaultEntry;
- rtems_hdl_tbl = config->irqHdlTbl;
-
- _CPU_ISR_Disable(level);
- /*
- * set up internal tables used by rtems interrupt prologue
- */
- /*
- * start with ISA IRQ
- */
- compute_i8259_masks_from_prio ();
-
- for (i=BSP_ISA_IRQ_LOWEST_OFFSET; i < BSP_ISA_IRQ_NUMBER; i++) {
- if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
- BSP_irq_enable_at_i8259s (i);
- rtems_hdl_tbl[i].on(&rtems_hdl_tbl[i]);
- }
- else {
- rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]);
- BSP_irq_disable_at_i8259s (i);
- }
- }
- /*
- * must enable slave pic anyway
- */
- BSP_irq_enable_at_i8259s (2);
- /*
- * continue with PCI IRQ
- */
- for (i=BSP_PCI_IRQ_LOWEST_OFFSET; i < BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER ; i++) {
- openpic_set_priority(0, internal_config->irqPrioTbl [i]);
- if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
- openpic_enable_irq ((int) i - BSP_PCI_IRQ_LOWEST_OFFSET);
- rtems_hdl_tbl[i].on(&rtems_hdl_tbl[i]);
- }
- else {
- rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]);
- openpic_disable_irq ((int) i - BSP_PCI_IRQ_LOWEST_OFFSET);
- }
- }
- /*
- * Must enable PCI/ISA bridge IRQ
- */
- openpic_enable_irq (0);
- /*
- * finish with Processor exceptions handled like IRQ
- */
- for (i=BSP_PROCESSOR_IRQ_LOWEST_OFFSET; i < BSP_PROCESSOR_IRQ_LOWEST_OFFSET + BSP_PROCESSOR_IRQ_NUMBER; i++) {
- if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
- rtems_hdl_tbl[i].on(&rtems_hdl_tbl[i]);
- }
- else {
- rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]);
- }
- }
- _CPU_ISR_Enable(level);
- return 1;
-}
-
-int BSP_rtems_irq_mngt_get(rtems_irq_global_settings** config)
-{
- *config = internal_config;
- return 0;
-}
-
-static unsigned spuriousIntr = 0;
-/*
- * High level IRQ handler called from shared_raw_irq_code_entry
- */
-void C_dispatch_irq_handler (CPU_Interrupt_frame *frame, unsigned int excNum)
-{
- register unsigned int irq;
- register unsigned isaIntr; /* boolean */
- register unsigned oldMask; /* old isa pic masks */
- register unsigned newMask; /* new isa pic masks */
- register unsigned msr;
- register unsigned new_msr;
-
-
- if (excNum == ASM_DEC_VECTOR) {
- _CPU_MSR_GET(msr);
- new_msr = msr | MSR_EE;
- _CPU_MSR_SET(new_msr);
-
- rtems_hdl_tbl[BSP_DECREMENTER].hdl();
-
- _CPU_MSR_SET(msr);
- return;
-
- }
- irq = openpic_irq(0);
- if (irq == OPENPIC_VEC_SPURIOUS) {
- ++spuriousIntr;
- return;
- }
- isaIntr = (irq == BSP_PCI_ISA_BRIDGE_IRQ);
- if (isaIntr) {
- /*
- * Acknowledge and read 8259 vector
- */
- irq = (unsigned int) (*(unsigned char *) RAVEN_INTR_ACK_REG);
- /*
- * store current PIC mask
- */
- oldMask = i8259s_cache;
- newMask = oldMask | irq_mask_or_tbl [irq];
- i8259s_cache = newMask;
- outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
- outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
- BSP_irq_ack_at_i8259s (irq);
- openpic_eoi(0);
- }
- _CPU_MSR_GET(msr);
- new_msr = msr | MSR_EE;
- _CPU_MSR_SET(new_msr);
-
- rtems_hdl_tbl[irq].hdl();
-
- _CPU_MSR_SET(msr);
-
- if (isaIntr) {
- i8259s_cache = oldMask;
- outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
- outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
- }
- else {
- openpic_eoi(0);
- }
-}
-
-
-
-void _ThreadProcessSignalsFromIrq (BSP_Exception_frame* ctx)
-{
- /*
- * Process pending signals that have not already been
- * processed by _Thread_Displatch. This happens quite
- * unfrequently : the ISR must have posted an action
- * to the current running thread.
- */
- if ( _Thread_Do_post_task_switch_extension ||
- _Thread_Executing->do_post_task_switch_extension ) {
- _Thread_Executing->do_post_task_switch_extension = FALSE;
- _API_extensions_Run_postswitch();
- }
- /*
- * I plan to process other thread related events here.
- * This will include DEBUG session requested from keyboard...
- */
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 16:58:41 +0000