diff options
Diffstat (limited to 'cpukit/include/rtems/irq-extension.h')
| -rw-r--r-- | cpukit/include/rtems/irq-extension.h | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/cpukit/include/rtems/irq-extension.h b/cpukit/include/rtems/irq-extension.h index ff2c6daff4..35eaf1e635 100644 --- a/cpukit/include/rtems/irq-extension.h +++ b/cpukit/include/rtems/irq-extension.h @@ -9,12 +9,13 @@ /* * Based on concepts of Pavel Pisa, Till Straumann and Eric Valette. * - * Copyright (c) 2008 - * Embedded Brains GmbH - * Obere Lagerstr. 30 - * D-82178 Puchheim - * Germany - * rtems@embedded-brains.de + * Copyright (c) 2008-2014 embedded brains GmbH. + * + * embedded brains GmbH + * Dornierstr. 4 + * 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 @@ -54,6 +55,12 @@ extern "C" { #define RTEMS_INTERRUPT_SHARED ((rtems_option) 0x00000000) /** + * @brief Forces that this interrupt handler replaces the first handler with + * the same argument. + */ +#define RTEMS_INTERRUPT_REPLACE ((rtems_option) 0x00000002) + +/** * @brief Returns true if the interrupt handler unique option is set. */ #define RTEMS_INTERRUPT_IS_UNIQUE( options) \ @@ -66,6 +73,12 @@ extern "C" { (!RTEMS_INTERRUPT_IS_UNIQUE( options)) /** + * @brief Returns true if the interrupt handler replace option is set. + */ +#define RTEMS_INTERRUPT_IS_REPLACE( options) \ + ((options) & RTEMS_INTERRUPT_REPLACE) + +/** * @brief Interrupt handler routine type. */ typedef void (*rtems_interrupt_handler)(void *); @@ -78,6 +91,7 @@ typedef void (*rtems_interrupt_handler)(void *); * * - @ref RTEMS_INTERRUPT_UNIQUE * - @ref RTEMS_INTERRUPT_SHARED + * - @ref RTEMS_INTERRUPT_REPLACE * * with the @a options parameter for the interrupt handler. * @@ -88,6 +102,13 @@ typedef void (*rtems_interrupt_handler)(void *); * If the option @ref RTEMS_INTERRUPT_UNIQUE is set then it shall be ensured * that this handler will be the only one for this vector. * + * If the option @ref RTEMS_INTERRUPT_REPLACE is set then it shall be ensured + * that this handler will replace the first handler with the same argument for + * this vector if it exists, otherwise an error status shall be returned. A + * second handler with the same argument for this vector shall remain + * unchanged. The new handler will inherit the unique or shared option from + * the replaced handler. + * * You can provide an informative description @a info. This may be used for * system debugging and status tools. The string has to be persistent during * the handler life time. @@ -108,6 +129,8 @@ typedef void (*rtems_interrupt_handler)(void *); * installed and there is already a handler installed this shall be returned. * @retval RTEMS_TOO_MANY If a handler with this argument is already installed * for the vector this shall be returned. + * @retval RTEMS_UNSATISFIED If no handler exists to replace with the specified + * argument and vector this shall be returned. * @retval RTEMS_IO_ERROR Reserved for board support package specific error * conditions. */ |