diff options
-rw-r--r-- | c/src/lib/libbsp/arm/raspberrypi/include/irq.h | 4 | ||||
-rw-r--r-- | c/src/lib/libbsp/arm/raspberrypi/irq/irq.c | 133 |
2 files changed, 94 insertions, 43 deletions
diff --git a/c/src/lib/libbsp/arm/raspberrypi/include/irq.h b/c/src/lib/libbsp/arm/raspberrypi/include/irq.h index 7ccfd3bf31..22ee29beb1 100644 --- a/c/src/lib/libbsp/arm/raspberrypi/include/irq.h +++ b/c/src/lib/libbsp/arm/raspberrypi/include/irq.h @@ -51,11 +51,15 @@ #define BCM2835_IRQ_ID_UART 57 +#define BCM2835_IRQ_ID_BASIC_BASE_ID 64 #define BCM2835_IRQ_ID_TIMER_0 64 #define BCM2835_IRQ_ID_MAILBOX_0 65 #define BCM2835_IRQ_ID_DOORBELL_0 66 #define BCM2835_IRQ_ID_DOORBELL_1 67 #define BCM2835_IRQ_ID_GPU0_HALTED 68 +#define BCM2835_IRQ_ID_GPU1_HALTED 69 +#define BCM2835_IRQ_ID_ILL_ACCESS_1 70 +#define BCM2835_IRQ_ID_ILL_ACCESS_0 71 #define BSP_INTERRUPT_VECTOR_MIN (0) #define BSP_INTERRUPT_VECTOR_MAX (BCM2835_INTC_TOTAL_IRQ - 1) diff --git a/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c b/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c index ce5b363f5d..e654d077c9 100644 --- a/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c +++ b/c/src/lib/libbsp/arm/raspberrypi/irq/irq.c @@ -1,5 +1,5 @@ /** - * @file + * @file irq.c * * @ingroup raspberrypi_interrupt * @@ -7,6 +7,8 @@ */ /* + * Copyright (c) 2014 Andre Marques <andre.lousa.marques at gmail.com> + * * Copyright (c) 2009 * embedded brains GmbH * Obere Lagerstr. 30 @@ -27,78 +29,123 @@ #include <bsp/raspberrypi.h> #include <bsp/linker-symbols.h> #include <bsp/mmu.h> +#include <rtems/bspIo.h> +#include <strings.h> + +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 */ +}; /* -** Determine the source of the interrupt and dispatch the correct handler. -*/ + * 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) { - rtems_vector_number vector = 255; + unsigned int pend; + unsigned int pend_bit; - /* ARM timer */ - if (BCM2835_REG(BCM2835_IRQ_BASIC) && 0x1) - { - vector = BCM2835_IRQ_ID_TIMER_0; + rtems_vector_number vector = 255; - } - /* UART 0 */ - else if ( BCM2835_REG(BCM2835_IRQ_BASIC) && BCM2835_BIT(19)) - { - vector = BCM2835_IRQ_ID_UART; + 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); } - } rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector) { - rtems_interrupt_level level; - - rtems_interrupt_disable(level); + if ( vector > BSP_INTERRUPT_VECTOR_MAX ) + return RTEMS_INVALID_ID; - /* ARM Timer */ - if ( vector == BCM2835_IRQ_ID_TIMER_0 ) - { - BCM2835_REG(BCM2835_IRQ_ENABLE_BASIC) = 0x1; - } - /* UART 0 */ - else if ( vector == BCM2835_IRQ_ID_UART ) - { - BCM2835_REG(BCM2835_IRQ_ENABLE2) = BCM2835_BIT(25); - - } - rtems_interrupt_enable(level); + BCM2835_REG(bsp_vector_to_reg(vector)->enable_reg_addr) = + bsp_vector_to_mask(vector); return RTEMS_SUCCESSFUL; } rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector) { - rtems_interrupt_level level; + if ( vector > BSP_INTERRUPT_VECTOR_MAX ) + return RTEMS_INVALID_ID; - rtems_interrupt_disable(level); - - if ( vector == BCM2835_IRQ_ID_TIMER_0 ) - { - BCM2835_REG(BCM2835_IRQ_DISABLE_BASIC) = 0x1; - } - else if ( vector == BCM2835_IRQ_ID_UART ) - { - BCM2835_REG(BCM2835_IRQ_DISABLE2) = BCM2835_BIT(25); - } - rtems_interrupt_enable(level); + BCM2835_REG(bsp_vector_to_reg(vector)->disable_reg_addr) = + bsp_vector_to_mask(vector); return RTEMS_SUCCESSFUL; } - void bsp_interrupt_handler_default(rtems_vector_number vector) { - printk("spurious interrupt: %u\n", vector); + printk("spurious interrupt: %lu\n", vector); } rtems_status_code bsp_interrupt_facility_initialize(void) |