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Diffstat (limited to 'c/src/lib/libcpu/powerpc/ppc403/irq/ictrl.c')
-rw-r--r--c/src/lib/libcpu/powerpc/ppc403/irq/ictrl.c295
1 files changed, 0 insertions, 295 deletions
diff --git a/c/src/lib/libcpu/powerpc/ppc403/irq/ictrl.c b/c/src/lib/libcpu/powerpc/ppc403/irq/ictrl.c
deleted file mode 100644
index 78361916cb..0000000000
--- a/c/src/lib/libcpu/powerpc/ppc403/irq/ictrl.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/* ictrl.c
- *
- * This routine installs and handles external interrupt vectors for
- * PowerPC 403 CPU built-in external interrupt controller
- *
- * Author: Thomas Doerfler <td@imd.m.isar.de>
- *
- * COPYRIGHT (c) 1998 by IMD, Puchheim, Germany
- *
- * To anyone who acknowledges that this file is provided "AS IS"
- * without any express or implied warranty:
- * permission to use, copy, modify, and distribute this file
- * for any purpose is hereby granted without fee, provided that
- * the above copyright notice and this notice appears in all
- * copies, and that the name of IMD not be used in
- * advertising or publicity pertaining to distribution of the
- * software without specific, written prior permission.
- * IMD makes no representations about the suitability
- * of this software for any purpose.
- *
- * Modifications for PPC405GP by Dennis Ehlin
- *
- */
-
-#include "ictrl.h"
-#include <rtems.h>
-#include <rtems/libio.h>
-
-#include <stdlib.h> /* for atexit() */
-
-/*
- * ISR vector table to dispatch external interrupts
- */
-
-rtems_isr_entry ictrl_vector_table[PPC_IRQ_EXT_MAX];
-
-/*
- *
- * some utilities to access the EXI* registers
- *
- */
-
-/*
- * clear bits in EXISR that have a bit set in mask
- */
-#if defined(ppc405)
-RTEMS_INLINE_ROUTINE void
-clr_exisr(uint32_t mask)
-{
- __asm__ volatile ("mtdcr 0xC0,%0"::"r" (mask));/*EXISR*/
-}
-
-/*
- * get value of EXISR
- */
-RTEMS_INLINE_ROUTINE uint32_t
-get_exisr(void)
-{
- uint32_t val;
-
- __asm__ volatile ("mfdcr %0,0xC0":"=r" (val));/*EXISR*/
- return val;
-}
-
-/*
- * get value of EXIER
- */
-RTEMS_INLINE_ROUTINE uint32_t
-get_exier(void)
-{
- uint32_t val;
- __asm__ volatile ("mfdcr %0,0xC2":"=r" (val));/*EXIER*/
- return val;
-}
-
-/*
- * set value of EXIER
- */
-RTEMS_INLINE_ROUTINE void
-set_exier(uint32_t val)
-{
- __asm__ volatile ("mtdcr 0xC2,%0"::"r" (val));/*EXIER*/
-}
-
-#else /* not ppc405 */
-
-RTEMS_INLINE_ROUTINE void
-clr_exisr(uint32_t mask)
-{
- __asm__ volatile ("mtdcr 0x40,%0"::"r" (mask));/*EXISR*/
-}
-
-/*
- * get value of EXISR
- */
-RTEMS_INLINE_ROUTINE uint32_t
-get_exisr(void)
-{
- uint32_t val;
-
- __asm__ volatile ("mfdcr %0,0x40":"=r" (val));/*EXISR*/
- return val;
-}
-
-/*
- * get value of EXIER
- */
-RTEMS_INLINE_ROUTINE uint32_t
-get_exier(void)
-{
- uint32_t val;
- __asm__ volatile ("mfdcr %0,0x42":"=r" (val));/*EXIER*/
- return val;
-}
-
-/*
- * set value of EXIER
- */
-RTEMS_INLINE_ROUTINE void
-set_exier(uint32_t val)
-{
- __asm__ volatile ("mtdcr 0x42,%0"::"r" (val));/*EXIER*/
-}
-#endif /* ppc405 */
-/*
- * enable an external interrupt, make this interrupt consistent
- */
-RTEMS_INLINE_ROUTINE void
-enable_ext_irq( uint32_t mask)
-{
- rtems_interrupt_level level;
-
- rtems_interrupt_disable(level);
- set_exier(get_exier() | ((mask)&PPC_EXI_MASK));
- rtems_interrupt_enable(level);
-}
-
-/*
- * disable an external interrupt, make this interrupt consistent
- */
-RTEMS_INLINE_ROUTINE void
-disable_ext_irq( uint32_t mask)
-{
- rtems_interrupt_level level;
-
- rtems_interrupt_disable(level);
- set_exier(get_exier() & ~(mask) & PPC_EXI_MASK);
- rtems_interrupt_enable(level);
-}
-
-/*
- *
- * this function is called, when a external interrupt is present and
- * enabled but there is no handler installed. It will clear
- * the corresponding enable bits and call the spurious handler
- * present in the CPU Configuration Table, if any.
- *
- */
-void
-ictrl_spurious_handler(uint32_t spurious_mask,
- void *cpu_frame)
-{
- int v;
- extern void (*bsp_spurious_handler)(uint32_t vector, void *);
-
- for (v=0; v < PPC_IRQ_EXT_MAX; v++) {
- if (VEC_TO_EXMSK(v) & spurious_mask) {
- clr_exisr(VEC_TO_EXMSK(v));
- disable_ext_irq(VEC_TO_EXMSK(v));
-#if 0
- printf("spurious external interrupt: %d at pc 0x%x; disabling\n",
- vector, cpu_frame->Interrupt.pcoqfront);
-#endif
- if (bsp_spurious_handler()) {
- bsp_spurious_handler(v + PPC_IRQ_EXT_BASE,cpu_frame);
- }
- }
- }
-}
-
-
-/*
- * ISR Handler: this is called from the primary exception dispatcher
- */
-
-void
-ictrl_isr(rtems_vector_number vector, void *cpu_frame)
-{
- uint32_t istat,
- mask,
- global_vec;
- int exvec;
- rtems_isr_entry handler;
-
- istat = get_exisr() & get_exier() & PPC_EXI_MASK;
-
- /* FIXME: this may be speeded up using cntlzw instruction */
- for (exvec = 0;exvec < PPC_IRQ_EXT_MAX;exvec++) {
- mask = VEC_TO_EXMSK(exvec);
- if (0 != (istat & mask)) {
- /*clr_exisr(mask); too early to ack*/
- handler = ictrl_vector_table[exvec];
- if (handler) {
- istat &= ~mask;
- global_vec = exvec + PPC_IRQ_EXT_BASE;
- (handler)(global_vec);
- }
- clr_exisr(mask);/* now we can ack*/
- }
- }
- if (istat != 0) { /* anything left? then we have a spurious interrupt */
- ictrl_spurious_handler(istat,cpu_frame);
- }
-}
-
-/*
- *
- * the following functions form the user interface
- *
- */
-
-/*
- *
- * install a user vector for one of the external interrupt sources
- *
- */
-rtems_status_code
-ictrl_set_vector(rtems_isr_entry new_handler,
- uint32_t vector,
- rtems_isr_entry *old_handler
-)
-{
- /*
- * We put the actual user ISR address in 'ictrl_vector_table'. This will
- * be used by the _ictrl_isr so the user gets control.
- */
-
- /* check for valid vector range */
- if ((vector >= PPC_IRQ_EXT_BASE) &&
- (vector < PPC_IRQ_EXT_BASE + PPC_IRQ_EXT_MAX)) {
- /* return old handler entry */
- *old_handler = ictrl_vector_table[vector - PPC_IRQ_EXT_BASE];
-
- if (new_handler != NULL) {
- /* store handler function... */
- ictrl_vector_table[vector - PPC_IRQ_EXT_BASE] = new_handler;
- /* then enable it in EXIER register */
- enable_ext_irq(VEC_TO_EXMSK(vector - PPC_IRQ_EXT_BASE));
- }
- else { /* new_handler == NULL */
- /* then disable it in EXIER register */
- disable_ext_irq(VEC_TO_EXMSK(vector - PPC_IRQ_EXT_BASE));
- ictrl_vector_table[vector - PPC_IRQ_EXT_BASE] = NULL;
- }
- return RTEMS_SUCCESSFUL;
- }
- else {
- return RTEMS_INVALID_NUMBER;
- }
-}
-
-/*
- * Called via atexit()
- * deactivate the interrupt controller
- */
-
-void
-ictrl_exit(void)
-{
- /* mark them all unused */
- disable_ext_irq(~0);
- clr_exisr(~0);
-
-}
-
-/*
- * activate the interrupt controller
- */
-
-rtems_status_code
-ictrl_init(void)
-{
- proc_ptr dummy;
-
- /* mark them all unused */
- disable_ext_irq(~0);
- clr_exisr(~0);
-
- /* install the external interrupt handler */
- _CPU_ISR_install_vector(PPC_IRQ_EXTERNAL,
- ictrl_isr,
- &dummy);
- atexit(ictrl_exit);
- return RTEMS_SUCCESSFUL;
-}
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