diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/raspberrypi/irq/irq.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/raspberrypi/irq/irq.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c b/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c deleted file mode 100644 index 5b10385bfe..0000000000 --- a/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c +++ /dev/null @@ -1,168 +0,0 @@ -/** - * @file irq.c - * - * @ingroup raspberrypi_interrupt - * - * @brief Interrupt support. - */ - -/* - * Copyright (c) 2014 Andre Marques <andre.lousa.marques at gmail.com> - * - * Copyright (c) 2009 - * embedded brains GmbH - * Obere Lagerstr. 30 - * D-82178 Puchheim - * Germany - * <rtems@embedded-brains.de> - * - * 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/score/armv4.h> - -#include <bsp.h> -#include <bsp/irq.h> -#include <bsp/irq-generic.h> -#include <bsp/raspberrypi.h> -#include <bsp/linker-symbols.h> -#include <bsp/mmu.h> -#include <rtems/bspIo.h> -#include <strings.h> - -#ifdef RTEMS_SMP -#include <rtems/score/smp.h> -#include <rtems/score/smpimpl.h> -#endif - -typedef struct { - unsigned long enable_reg_addr; - unsigned long disable_reg_addr; -} bcm2835_irq_ctrl_reg_t; - -static const bcm2835_irq_ctrl_reg_t bcm2835_irq_ctrl_reg_table[] = { - { BCM2835_IRQ_ENABLE1, BCM2835_IRQ_DISABLE1 }, - { BCM2835_IRQ_ENABLE2, BCM2835_IRQ_DISABLE2 }, - { BCM2835_IRQ_ENABLE_BASIC, BCM2835_IRQ_DISABLE_BASIC } -}; - -static inline const bcm2835_irq_ctrl_reg_t * -bsp_vector_to_reg(rtems_vector_number vector) -{ - return bcm2835_irq_ctrl_reg_table + (vector >> 5); -} - -static inline uint32_t -bsp_vector_to_mask(rtems_vector_number vector) -{ - return 1 << (vector & 0x1f); -} - -static const int bcm2835_irq_speedup_table[] = -{ - /* 0 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 0, - /* 1 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 1, - /* 2 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 2, - /* 3 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 3, - /* 4 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 4, - /* 5 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 5, - /* 6 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 6, - /* 7 */ BCM2835_IRQ_ID_BASIC_BASE_ID + 7, - /* 8 */ -1, /* One or more bits set in pending register 1 */ - /* 9 */ -2, /* One or more bits set in pending register 2 */ - /* 10 */ 7, /* GPU IRQ 7 */ - /* 11 */ 9, /* GPU IRQ 9 */ - /* 12 */ 10, /* GPU IRQ 10 */ - /* 13 */ 18, /* GPU IRQ 18 */ - /* 14 */ 19, /* GPU IRQ 19 */ - /* 15 */ 53, /* GPU IRQ 53 */ - /* 16 */ 54, /* GPU IRQ 54 */ - /* 17 */ 55, /* GPU IRQ 55 */ - /* 18 */ 56, /* GPU IRQ 56 */ - /* 19 */ 57, /* GPU IRQ 57 */ - /* 20 */ 62, /* GPU IRQ 62 */ -}; - -/* - * Define which basic peding register (BCM2835_IRQ_BASIC) bits - * should be processed through bcm2835_irq_speedup_table - */ - -#define BCM2835_IRQ_BASIC_SPEEDUP_USED_BITS 0x1ffcff - -/* - * Determine the source of the interrupt and dispatch the correct handler. - */ -void bsp_interrupt_dispatch(void) -{ - unsigned int pend; - unsigned int pend_bit; - - rtems_vector_number vector = 255; - -#ifdef RTEMS_SMP - uint32_t cpu_index_self = _SMP_Get_current_processor(); - uint32_t local_source = BCM2835_REG(BCM2836_IRQ_SOURCE_REG(cpu_index_self)); - - if ( local_source & BCM2836_IRQ_SOURCE_MBOX3 ) { - /* reset mailbox 3 contents to zero */ - BCM2835_REG(BCM2836_MAILBOX_3_READ_CLEAR_BASE + 0x10 * cpu_index_self) = 0xffffffff; - _SMP_Inter_processor_interrupt_handler(); - } - if ( cpu_index_self != 0 ) - return; -#endif /* RTEMS_SMP */ - - pend = BCM2835_REG(BCM2835_IRQ_BASIC); - if ( pend & BCM2835_IRQ_BASIC_SPEEDUP_USED_BITS ) { - pend_bit = ffs(pend) - 1; - vector = bcm2835_irq_speedup_table[pend_bit]; - } else { - pend = BCM2835_REG(BCM2835_IRQ_PENDING1); - if ( pend != 0 ) { - pend_bit = ffs(pend) - 1; - vector = pend_bit; - } else { - pend = BCM2835_REG(BCM2835_IRQ_PENDING2); - if ( pend != 0 ) { - pend_bit = ffs(pend) - 1; - vector = pend_bit + 32; - } - } - } - - if ( vector < 255 ) - { - bsp_interrupt_handler_dispatch(vector); - } -} - -void bsp_interrupt_vector_enable(rtems_vector_number vector) -{ - bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); - BCM2835_REG(bsp_vector_to_reg(vector)->enable_reg_addr) = - bsp_vector_to_mask(vector); -} - -void bsp_interrupt_vector_disable(rtems_vector_number vector) -{ - bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector)); - BCM2835_REG(bsp_vector_to_reg(vector)->disable_reg_addr) = - bsp_vector_to_mask(vector); -} - -void bsp_interrupt_handler_default(rtems_vector_number vector) -{ - printk("spurious interrupt: %lu\n", vector); -} - -rtems_status_code bsp_interrupt_facility_initialize(void) -{ - BCM2835_REG(BCM2835_IRQ_DISABLE1) = 0xffffffff; - BCM2835_REG(BCM2835_IRQ_DISABLE2) = 0xffffffff; - BCM2835_REG(BCM2835_IRQ_DISABLE_BASIC) = 0xffffffff; - BCM2835_REG(BCM2835_IRQ_FIQ_CTRL) = 0; - return RTEMS_SUCCESSFUL; -} |