diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/score603e/irq/irq.c')
-rw-r--r-- | c/src/lib/libbsp/powerpc/score603e/irq/irq.c | 451 |
1 files changed, 451 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/score603e/irq/irq.c b/c/src/lib/libbsp/powerpc/score603e/irq/irq.c new file mode 100644 index 0000000000..d743bcc962 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/score603e/irq/irq.c @@ -0,0 +1,451 @@ +/* + * + * 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.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#include <stdlib.h> + +#include <bsp.h> +#include <bsp/irq.h> +#include <bsp/VME.h> +#include <rtems/score/apiext.h> /* for post ISR signal processing */ +#include <libcpu/raw_exception.h> +#include <libcpu/io.h> +#include <bsp/vectors.h> +#include <stdlib.h> +#include <rtems/bspIo.h> /* for printk */ + +/* + * 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 pci 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 Processor 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 ---------------- + */ + +/* + * 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 Shared Irq Handler Mngt Routines ---------------- + */ +int BSP_install_rtems_shared_irq_handler (const rtems_irq_connect_data* irq) +{ + unsigned int level; + rtems_irq_connect_data* vchain; + + if (!isValidInterrupt(irq->name)) { + printk("Invalid interrupt vector %d\n",irq->name); + return 0; + } + + _CPU_ISR_Disable(level); + + if ( (int)rtems_hdl_tbl[irq->name].next_handler == -1 ) { + _CPU_ISR_Enable(level); + printk("IRQ vector %d already connected to an unshared handler\n",irq->name); + return 0; + } + + vchain = (rtems_irq_connect_data*)malloc(sizeof(rtems_irq_connect_data)); + + /* save off topmost handler */ + vchain[0]= rtems_hdl_tbl[irq->name]; + + /* + * store the data provided by user + */ + rtems_hdl_tbl[irq->name] = *irq; + + /* link chain to new topmost handler */ + rtems_hdl_tbl[irq->name].next_handler = (void *)vchain; + + /* + * XXX FIX ME + */ + if (is_pci_irq(irq->name)) { + } + + if (is_processor_irq(irq->name)) { + /* + * Enable exception at processor level + */ + } + /* + * Enable interrupt on device + */ + irq->on(irq); + + _CPU_ISR_Enable(level); + + 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)) { + printk("Invalid interrupt vector %d\n",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. + */ + _CPU_ISR_Disable(level); + if (rtems_hdl_tbl[irq->name].hdl != default_rtems_entry.hdl) { + _CPU_ISR_Enable(level); + printk("IRQ vector %d already connected\n",irq->name); + return 0; + } + + /* + * store the data provided by user + */ + rtems_hdl_tbl[irq->name] = *irq; + rtems_hdl_tbl[irq->name].next_handler = (void *)-1; + + /* XXX -FIX ME !! */ + if (is_pci_irq(irq->name)) { + /* + * Enable interrupt + */ + } + + 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) +{ + unsigned int level; + + if (!isValidInterrupt(irq->name)) { + return 0; + } + _CPU_ISR_Disable(level); + *irq = rtems_hdl_tbl[irq->name]; + _CPU_ISR_Enable(level); + return 1; +} + +int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq) +{ + rtems_irq_connect_data *pchain= NULL, *vchain = NULL; + 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. + */ + _CPU_ISR_Disable(level); + if (rtems_hdl_tbl[irq->name].hdl != irq->hdl) { + _CPU_ISR_Enable(level); + return 0; + } + + if( (int)rtems_hdl_tbl[irq->name].next_handler != -1 ) + { + int found = 0; + + for( (pchain= NULL, vchain = &rtems_hdl_tbl[irq->name]); + (vchain->hdl != default_rtems_entry.hdl); + (pchain= vchain, vchain = (rtems_irq_connect_data*)vchain->next_handler) ) + { + if( vchain->hdl == irq->hdl ) + { + found= -1; break; + } + } + + if( !found ) + { + _CPU_ISR_Enable(level); + return 0; + } + } + else + { + if (rtems_hdl_tbl[irq->name].hdl != irq->hdl) + { + _CPU_ISR_Enable(level); + return 0; + } + } + + /* XXX - FIX ME !! */ + if (is_pci_irq(irq->name)) { + /* + * disable interrupt + */ + } + if (is_processor_irq(irq->name)) { + /* + * disable exception at processor level + */ + } + + /* + * Disable interrupt on device + */ + irq->off(irq); + + /* + * restore the default irq value + */ + if( !vchain ) + { + /* single handler vector... */ + rtems_hdl_tbl[irq->name] = default_rtems_entry; + } + else + { + if( pchain ) + { + /* non-first handler being removed */ + pchain->next_handler = vchain->next_handler; + } + else + { + /* first handler isn't malloc'ed, so just overwrite it. Since + the contents of vchain are being struct copied, vchain itself + goes away */ + rtems_hdl_tbl[irq->name]= *vchain; + } + free(vchain); + } + + _CPU_ISR_Enable(level); + + return 1; +} + +/* + * RTEMS Global Interrupt Handler Management 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 + */ + + /* + * XXX - FIX ME !!! + */ + for (i=BSP_PCI_IRQ_LOWEST_OFFSET; i < BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER ; i++) { + if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) { + { + rtems_irq_connect_data* vchain; + for( vchain = &rtems_hdl_tbl[i]; + ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl); + vchain = (rtems_irq_connect_data*)vchain->next_handler ) + { + vchain->on(vchain); + } + } + + } + else { + /* rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]); */ + { + rtems_irq_connect_data* vchain; + for( vchain = &rtems_hdl_tbl[i]; + ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl); + vchain = (rtems_irq_connect_data*)vchain->next_handler ) + { + vchain->off(vchain); + } + } + } + } + /* + * 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_irq_connect_data* vchain; + for( vchain = &rtems_hdl_tbl[i]; + ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl); + vchain = (rtems_irq_connect_data*)vchain->next_handler ) + { + vchain->on(vchain); + } + } + + } + else { + { + rtems_irq_connect_data* vchain; + for( vchain = &rtems_hdl_tbl[i]; + ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl); + vchain = (rtems_irq_connect_data*)vchain->next_handler ) + { + vchain->off(vchain); + } + } + + } + } + _CPU_ISR_Enable(level); + return 1; +} + +int BSP_rtems_irq_mngt_get(rtems_irq_global_settings** config) +{ + *config = internal_config; + return 0; +} + +int _BSP_vme_bridge_irq = -1; + +unsigned BSP_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 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(rtems_hdl_tbl[BSP_DECREMENTER].handle); + + _CPU_MSR_SET(msr); + return; + + } + irq = read_and_clear_irq(); + _CPU_MSR_GET(msr); + new_msr = msr | MSR_EE; + _CPU_MSR_SET(new_msr); + + /* rtems_hdl_tbl[irq].hdl(rtems_hdl_tbl[irq].handle); */ + { + rtems_irq_connect_data* vchain; + for( vchain = &rtems_hdl_tbl[irq]; + ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl); + vchain = (rtems_irq_connect_data*)vchain->next_handler ) + { + vchain->hdl(vchain->handle); + } + } + + _CPU_MSR_SET(msr); + +} + +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... + */ +} |