diff options
Diffstat (limited to 'c/src/lib/libcpu/bfin/interrupt/interrupt.c')
| -rw-r--r-- | c/src/lib/libcpu/bfin/interrupt/interrupt.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/c/src/lib/libcpu/bfin/interrupt/interrupt.c b/c/src/lib/libcpu/bfin/interrupt/interrupt.c deleted file mode 100644 index 7fe1eb19f7..0000000000 --- a/c/src/lib/libcpu/bfin/interrupt/interrupt.c +++ /dev/null @@ -1,196 +0,0 @@ -/* Support for Blackfin interrupt controller - * - * Copyright (c) 2008 Kallisti Labs, Los Gatos, CA, USA - * written by Allan Hessenflow <allanh@kallisti.com> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - - -#include <rtems.h> -#include <rtems/libio.h> - -#include <bsp.h> -#include <libcpu/cecRegs.h> -#include <libcpu/sicRegs.h> -#include <string.h> -#include <libcpu/interrupt.h> - - -static struct { - uint32_t mask; - bfin_isr_t *head; -} vectors[CEC_INTERRUPT_COUNT]; - -static uint32_t globalMask; - - -static rtems_isr interruptHandler(rtems_vector_number vector) { - bfin_isr_t *isr; - uint32_t sourceMask; - - vector -= CEC_INTERRUPT_BASE_VECTOR; - if (vector >= 0 && vector < CEC_INTERRUPT_COUNT) { - isr = vectors[vector].head; - sourceMask = *(uint32_t volatile *) SIC_ISR & - *(uint32_t volatile *) SIC_IMASK; - while (isr) { - if (sourceMask & isr->mask) { - isr->isr(isr->source); - sourceMask = *(uint32_t volatile *) SIC_ISR & - *(uint32_t volatile *) SIC_IMASK; - } - isr = isr->next; - } - } -} - -void bfin_interrupt_init(void) { - int source; - int vector; - uint32_t r; - int i; - int j; - - globalMask = ~(uint32_t) 0; - *(uint32_t volatile *) SIC_IMASK = 0; - memset(vectors, 0, sizeof(vectors)); - /* build mask showing what SIC sources drive each CEC vector */ - source = 0; - for (i = 0; i < SIC_IAR_COUNT; i++) { - r = *(uint32_t volatile *) (SIC_IAR_BASE_ADDRESS + i * SIC_IAR_PITCH); - for (j = 0; j < 8; j++) { - vector = r & 0x0f; - if (vector >= 0 && vector < CEC_INTERRUPT_COUNT) { - if (vectors[vector].mask == 0) - /* install our local handler */ - set_vector(interruptHandler, vector + CEC_INTERRUPT_BASE_VECTOR, 1); - vectors[vector].mask |= (1 << source); - } - r >>= 4; - source++; - } - } -} - -/* modify SIC_IMASK based on ISR list for a particular CEC vector */ -static void setMask(int vector) { - bfin_isr_t *isr; - uint32_t mask; - uint32_t r; - - mask = 0; - isr = vectors[vector].head; - while (isr) { - mask |= isr->mask; - isr = isr->next; - } - r = *(uint32_t volatile *) SIC_IMASK; - r &= ~vectors[vector].mask; - r |= mask; - r &= globalMask; - *(uint32_t volatile *) SIC_IMASK = r; -} - -/* add an ISR to the list for whichever vector it belongs to */ -void bfin_interrupt_register(bfin_isr_t *isr) { - bfin_isr_t *walk; - rtems_interrupt_level isrLevel; - - /* find the appropriate vector */ - for (isr->vector = 0; isr->vector < CEC_INTERRUPT_COUNT; isr->vector++) - if (vectors[isr->vector].mask & (1 << isr->source)) - break; - if (isr->vector < CEC_INTERRUPT_COUNT) { - isr->next = NULL; - isr->mask = 0; - rtems_interrupt_disable(isrLevel); - /* find the current end of the list */ - walk = vectors[isr->vector].head; - while (walk && walk->next) - walk = walk->next; - /* append new isr to list */ - if (walk) - walk->next = isr; - else - vectors[isr->vector].head = isr; - rtems_interrupt_enable(isrLevel); - } else - /* we failed, but make vector a legal value so other calls into - this module with this isr descriptor won't do anything bad */ - isr->vector = 0; -} - -void bfin_interrupt_unregister(bfin_isr_t *isr) { - bfin_isr_t *walk, *prev; - rtems_interrupt_level isrLevel; - - rtems_interrupt_disable(isrLevel); - walk = vectors[isr->vector].head; - prev = NULL; - /* find this isr in our list */ - while (walk && walk != isr) { - prev = walk; - walk = walk->next; - } - if (walk) { - /* if found, remove it */ - if (prev) - prev->next = walk->next; - else - vectors[isr->vector].head = walk->next; - /* fix up SIC_IMASK if necessary */ - setMask(isr->vector); - } - rtems_interrupt_enable(isrLevel); -} - -void bfin_interrupt_enable(bfin_isr_t *isr, bool enable) { - rtems_interrupt_level isrLevel; - - rtems_interrupt_disable(isrLevel); - isr->mask = enable ? (1 << isr->source) : 0; - setMask(isr->vector); - rtems_interrupt_enable(isrLevel); -} - -void bfin_interrupt_enable_all(int source, bool enable) { - rtems_interrupt_level isrLevel; - int vector; - bfin_isr_t *walk; - - for (vector = 0; vector < CEC_INTERRUPT_COUNT; vector++) - if (vectors[vector].mask & (1 << source)) - break; - if (vector < CEC_INTERRUPT_COUNT) { - rtems_interrupt_disable(isrLevel); - walk = vectors[vector].head; - while (walk) { - walk->mask = enable ? (1 << source) : 0; - walk = walk->next; - } - setMask(vector); - rtems_interrupt_enable(isrLevel); - } -} - -void bfin_interrupt_enable_global(int source, bool enable) { - int vector; - rtems_interrupt_level isrLevel; - - for (vector = 0; vector < CEC_INTERRUPT_COUNT; vector++) - if (vectors[vector].mask & (1 << source)) - break; - if (vector < CEC_INTERRUPT_COUNT) { - rtems_interrupt_disable(isrLevel); - if (enable) - globalMask |= 1 << source; - else - globalMask &= ~(1 << source); - setMask(vector); - rtems_interrupt_enable(isrLevel); - } -} - |