2010-01-03 14:01:35 +01:00
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/****************************************************************************
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2013-06-02 21:57:22 +02:00
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* arch/arm/src/sam34/sam_irq.c
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2010-01-03 14:01:35 +01:00
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*
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2013-01-22 02:25:40 +01:00
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* Copyright (C) 2009, 2011, 2013 Gregory Nutt. All rights reserved.
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2012-09-13 20:32:24 +02:00
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* Author: Gregory Nutt <gnutt@nuttx.org>
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2010-01-03 14:01:35 +01:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <arch/irq.h>
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#include "nvic.h"
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2013-03-18 22:10:08 +01:00
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#include "ram_vectors.h"
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2010-01-03 14:01:35 +01:00
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#include "up_arch.h"
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#include "os_internal.h"
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#include "up_internal.h"
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2013-06-02 21:04:40 +02:00
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#ifdef CONFIG_GPIO_IRQ
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# include "sam_gpio.h"
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#endif
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2010-01-03 14:01:35 +01:00
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* Enable NVIC debug features that are probably only desireable during
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* bringup
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*/
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2013-06-02 18:33:57 +02:00
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#undef SAM_IRQ_DEBUG
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2010-01-03 14:01:35 +01:00
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/* Get a 32-bit version of the default priority */
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#define DEFPRIORITY32 \
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(NVIC_SYSH_PRIORITY_DEFAULT << 24 |\
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NVIC_SYSH_PRIORITY_DEFAULT << 16 |\
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NVIC_SYSH_PRIORITY_DEFAULT << 8 |\
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NVIC_SYSH_PRIORITY_DEFAULT)
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/****************************************************************************
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* Public Data
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****************************************************************************/
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2011-04-07 01:01:06 +02:00
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volatile uint32_t *current_regs;
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2010-01-03 14:01:35 +01:00
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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2013-06-02 21:04:40 +02:00
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* Name: sam_dumpnvic
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2010-01-03 14:01:35 +01:00
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*
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* Description:
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* Dump some interesting NVIC registers
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*
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****************************************************************************/
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2013-06-02 18:33:57 +02:00
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#if defined(SAM_IRQ_DEBUG) && defined (CONFIG_DEBUG)
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2013-06-02 21:04:40 +02:00
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static void sam_dumpnvic(const char *msg, int irq)
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2010-01-03 14:01:35 +01:00
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{
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irqstate_t flags;
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flags = irqsave();
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slldbg("NVIC (%s, irq=%d):\n", msg, irq);
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slldbg(" INTCTRL: %08x VECTAB: %08x\n",
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getreg32(NVIC_INTCTRL), getreg32(NVIC_VECTAB));
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#if 0
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slldbg(" SYSH ENABLE MEMFAULT: %08x BUSFAULT: %08x USGFAULT: %08x SYSTICK: %08x\n",
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getreg32(NVIC_SYSHCON_MEMFAULTENA), getreg32(NVIC_SYSHCON_BUSFAULTENA),
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getreg32(NVIC_SYSHCON_USGFAULTENA), getreg32(NVIC_SYSTICK_CTRL_ENABLE));
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#endif
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slldbg(" IRQ ENABLE: %08x\n", getreg32(NVIC_IRQ0_31_ENABLE));
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slldbg(" SYSH_PRIO: %08x %08x %08x\n",
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getreg32(NVIC_SYSH4_7_PRIORITY), getreg32(NVIC_SYSH8_11_PRIORITY),
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getreg32(NVIC_SYSH12_15_PRIORITY));
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2013-06-02 18:33:57 +02:00
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slldbg(" IRQ PRIO: %08x %08x %08x %08x\n",
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2010-01-03 14:01:35 +01:00
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getreg32(NVIC_IRQ0_3_PRIORITY), getreg32(NVIC_IRQ4_7_PRIORITY),
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getreg32(NVIC_IRQ8_11_PRIORITY), getreg32(NVIC_IRQ12_15_PRIORITY));
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2013-06-02 18:33:57 +02:00
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slldbg(" %08x %08x %08x %08x\n",
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2010-01-03 14:01:35 +01:00
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getreg32(NVIC_IRQ16_19_PRIORITY), getreg32(NVIC_IRQ20_23_PRIORITY),
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getreg32(NVIC_IRQ24_27_PRIORITY), getreg32(NVIC_IRQ28_31_PRIORITY));
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irqrestore(flags);
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}
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#else
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2013-06-02 21:04:40 +02:00
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# define sam_dumpnvic(msg, irq)
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2010-01-03 14:01:35 +01:00
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#endif
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/****************************************************************************
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2013-06-02 21:04:40 +02:00
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* Name: sam_nmi, sam_busfault, sam_usagefault, sam_pendsv, sam_dbgmonitor,
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* sam_pendsv, sam_reserved
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2010-01-03 14:01:35 +01:00
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*
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* Description:
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* Handlers for various execptions. None are handled and all are fatal
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* error conditions. The only advantage these provided over the default
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* unexpected interrupt handler is that they provide a diagnostic output.
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*
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****************************************************************************/
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#ifdef CONFIG_DEBUG
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2013-06-02 21:04:40 +02:00
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static int sam_nmi(int irq, FAR void *context)
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2010-01-03 14:01:35 +01:00
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{
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(void)irqsave();
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dbg("PANIC!!! NMI received\n");
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2013-04-25 23:19:59 +02:00
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PANIC();
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2010-01-03 14:01:35 +01:00
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return 0;
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}
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2013-06-02 21:04:40 +02:00
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static int sam_busfault(int irq, FAR void *context)
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2010-01-03 14:01:35 +01:00
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{
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(void)irqsave();
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dbg("PANIC!!! Bus fault recived\n");
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2013-04-25 23:19:59 +02:00
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PANIC();
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2010-01-03 14:01:35 +01:00
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return 0;
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}
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2013-06-02 21:04:40 +02:00
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static int sam_usagefault(int irq, FAR void *context)
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2010-01-03 14:01:35 +01:00
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{
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(void)irqsave();
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dbg("PANIC!!! Usage fault received\n");
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2013-04-25 23:19:59 +02:00
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PANIC();
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2010-01-03 14:01:35 +01:00
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return 0;
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}
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2013-06-02 21:04:40 +02:00
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static int sam_pendsv(int irq, FAR void *context)
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2010-01-03 14:01:35 +01:00
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{
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(void)irqsave();
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dbg("PANIC!!! PendSV received\n");
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2013-04-25 23:19:59 +02:00
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PANIC();
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2010-01-03 14:01:35 +01:00
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return 0;
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}
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2013-06-02 21:04:40 +02:00
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static int sam_dbgmonitor(int irq, FAR void *context)
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2010-01-03 14:01:35 +01:00
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{
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(void)irqsave();
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dbg("PANIC!!! Debug Monitor receieved\n");
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2013-04-25 23:19:59 +02:00
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PANIC();
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2010-01-03 14:01:35 +01:00
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return 0;
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}
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2013-06-02 21:04:40 +02:00
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static int sam_reserved(int irq, FAR void *context)
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2010-01-03 14:01:35 +01:00
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{
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(void)irqsave();
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dbg("PANIC!!! Reserved interrupt\n");
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2013-04-25 23:19:59 +02:00
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PANIC();
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2010-01-03 14:01:35 +01:00
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return 0;
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}
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#endif
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2013-01-22 02:25:40 +01:00
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/****************************************************************************
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2013-06-02 21:04:40 +02:00
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* Name: sam_prioritize_syscall
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2013-01-22 02:25:40 +01:00
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*
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* Description:
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* Set the priority of an exception. This function may be needed
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* internally even if support for prioritized interrupts is not enabled.
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*
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****************************************************************************/
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2013-01-22 17:09:10 +01:00
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#ifdef CONFIG_ARMV7M_USEBASEPRI
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2013-06-02 21:04:40 +02:00
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static inline void sam_prioritize_syscall(int priority)
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2013-01-22 02:25:40 +01:00
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{
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uint32_t regval;
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2013-01-22 17:09:10 +01:00
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/* SVCALL is system handler 11 */
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2013-01-22 02:25:40 +01:00
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2013-01-22 17:09:10 +01:00
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regval = getreg32(NVIC_SYSH8_11_PRIORITY);
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regval &= ~NVIC_SYSH_PRIORITY_PR11_MASK;
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regval |= (priority << NVIC_SYSH_PRIORITY_PR11_SHIFT);
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putreg32(regval, NVIC_SYSH8_11_PRIORITY);
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2013-01-22 02:25:40 +01:00
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}
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#endif
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2010-01-03 14:01:35 +01:00
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/****************************************************************************
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2013-06-02 21:04:40 +02:00
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* Name: sam_irqinfo
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2010-01-03 14:01:35 +01:00
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*
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* Description:
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* Given an IRQ number, provide the register and bit setting to enable or
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* disable the irq.
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*
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****************************************************************************/
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2013-06-02 21:04:40 +02:00
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static int sam_irqinfo(int irq, uint32_t *regaddr, uint32_t *bit)
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2010-01-03 14:01:35 +01:00
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{
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2013-06-02 18:33:57 +02:00
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DEBUGASSERT(irq >= SAM_IRQ_NMI && irq < NR_IRQS);
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2010-01-03 14:01:35 +01:00
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/* Check for external interrupt */
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2013-06-02 18:33:57 +02:00
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if (irq >= SAM_IRQ_EXTINT)
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2010-01-03 14:01:35 +01:00
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{
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2013-06-02 18:33:57 +02:00
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if (irq < SAM_IRQ_NIRQS)
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2010-01-03 14:01:35 +01:00
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{
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*regaddr = NVIC_IRQ0_31_ENABLE;
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2013-06-02 18:33:57 +02:00
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*bit = 1 << (irq - SAM_IRQ_EXTINT);
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2010-01-03 14:01:35 +01:00
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}
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else
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{
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return ERROR; /* Invalid interrupt */
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}
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}
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/* Handle processor exceptions. Only a few can be disabled */
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else
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{
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*regaddr = NVIC_SYSHCON;
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2013-06-02 18:33:57 +02:00
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if (irq == SAM_IRQ_MEMFAULT)
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2010-01-03 14:01:35 +01:00
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{
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*bit = NVIC_SYSHCON_MEMFAULTENA;
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}
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2013-06-02 18:33:57 +02:00
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else if (irq == SAM_IRQ_BUSFAULT)
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2010-01-03 14:01:35 +01:00
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{
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*bit = NVIC_SYSHCON_BUSFAULTENA;
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}
|
2013-06-02 18:33:57 +02:00
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else if (irq == SAM_IRQ_USAGEFAULT)
|
2010-01-03 14:01:35 +01:00
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{
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*bit = NVIC_SYSHCON_USGFAULTENA;
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}
|
2013-06-02 18:33:57 +02:00
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else if (irq == SAM_IRQ_SYSTICK)
|
2010-01-03 14:01:35 +01:00
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{
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*regaddr = NVIC_SYSTICK_CTRL;
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*bit = NVIC_SYSTICK_CTRL_ENABLE;
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}
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else
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{
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return ERROR; /* Invalid or unsupported exception */
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}
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}
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return OK;
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}
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/****************************************************************************
|
|
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|
* Public Functions
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|
|
|
****************************************************************************/
|
|
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|
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|
|
/****************************************************************************
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|
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|
* Name: up_irqinitialize
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****************************************************************************/
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void up_irqinitialize(void)
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{
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/* Disable all interrupts */
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putreg32(0, NVIC_IRQ0_31_ENABLE);
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|
2013-03-18 22:10:08 +01:00
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/* Set up the vector table address.
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|
*
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|
|
|
* If CONFIG_ARCH_RAMVECTORS is defined, then we are using a RAM-based
|
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* vector table that requires special initialization.
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|
*/
|
2010-01-03 14:01:35 +01:00
|
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|
2013-03-18 22:10:08 +01:00
|
|
|
#if defined(CONFIG_ARCH_RAMVECTORS)
|
|
|
|
up_ramvec_initialize();
|
|
|
|
#elif defined(CONFIG_STM32_DFU)
|
2013-06-02 21:04:40 +02:00
|
|
|
putreg32((uint32_t)sam_vectors, NVIC_VECTAB);
|
2010-01-03 14:01:35 +01:00
|
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|
#endif
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/* Set all interrrupts (and exceptions) to the default priority */
|
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|
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putreg32(DEFPRIORITY32, NVIC_SYSH4_7_PRIORITY);
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putreg32(DEFPRIORITY32, NVIC_SYSH8_11_PRIORITY);
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putreg32(DEFPRIORITY32, NVIC_SYSH12_15_PRIORITY);
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putreg32(DEFPRIORITY32, NVIC_IRQ0_3_PRIORITY);
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putreg32(DEFPRIORITY32, NVIC_IRQ4_7_PRIORITY);
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putreg32(DEFPRIORITY32, NVIC_IRQ8_11_PRIORITY);
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putreg32(DEFPRIORITY32, NVIC_IRQ12_15_PRIORITY);
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putreg32(DEFPRIORITY32, NVIC_IRQ16_19_PRIORITY);
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|
putreg32(DEFPRIORITY32, NVIC_IRQ20_23_PRIORITY);
|
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|
putreg32(DEFPRIORITY32, NVIC_IRQ24_27_PRIORITY);
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|
putreg32(DEFPRIORITY32, NVIC_IRQ28_31_PRIORITY);
|
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|
/* currents_regs is non-NULL only while processing an interrupt */
|
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|
current_regs = NULL;
|
|
|
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|
|
/* Attach the SVCall and Hard Fault exception handlers. The SVCall
|
|
|
|
* exception is used for performing context switches; The Hard Fault
|
|
|
|
* must also be caught because a SVCall may show up as a Hard Fault
|
|
|
|
* under certain conditions.
|
|
|
|
*/
|
|
|
|
|
2013-06-02 18:33:57 +02:00
|
|
|
irq_attach(SAM_IRQ_SVCALL, up_svcall);
|
|
|
|
irq_attach(SAM_IRQ_HARDFAULT, up_hardfault);
|
2010-01-03 14:01:35 +01:00
|
|
|
|
|
|
|
/* Set the priority of the SVCall interrupt */
|
|
|
|
|
|
|
|
#ifdef CONFIG_ARCH_IRQPRIO
|
2013-06-02 18:33:57 +02:00
|
|
|
/* up_prioritize_irq(SAM_IRQ_PENDSV, NVIC_SYSH_PRIORITY_MIN); */
|
2013-01-22 02:25:40 +01:00
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARMV7M_USEBASEPRI
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_prioritize_syscall(NVIC_SYSH_SVCALL_PRIORITY);
|
2010-01-03 14:01:35 +01:00
|
|
|
#endif
|
|
|
|
|
2011-04-06 03:51:07 +02:00
|
|
|
/* If the MPU is enabled, then attach and enable the Memory Management
|
|
|
|
* Fault handler.
|
|
|
|
*/
|
|
|
|
|
2011-08-05 23:57:49 +02:00
|
|
|
#ifdef CONFIG_ARMV7M_MPU
|
2013-06-02 18:33:57 +02:00
|
|
|
irq_attach(SAM_IRQ_MEMFAULT, up_memfault);
|
|
|
|
up_enable_irq(SAM_IRQ_MEMFAULT);
|
2011-04-06 03:51:07 +02:00
|
|
|
#endif
|
|
|
|
|
2010-01-03 14:01:35 +01:00
|
|
|
/* Attach all other processor exceptions (except reset and sys tick) */
|
|
|
|
|
|
|
|
#ifdef CONFIG_DEBUG
|
2013-06-02 21:04:40 +02:00
|
|
|
irq_attach(SAM_IRQ_NMI, sam_nmi);
|
2011-08-05 23:57:49 +02:00
|
|
|
#ifndef CONFIG_ARMV7M_MPU
|
2013-06-02 18:33:57 +02:00
|
|
|
irq_attach(SAM_IRQ_MEMFAULT, up_memfault);
|
2011-04-06 03:51:07 +02:00
|
|
|
#endif
|
2013-06-02 21:04:40 +02:00
|
|
|
irq_attach(SAM_IRQ_BUSFAULT, sam_busfault);
|
|
|
|
irq_attach(SAM_IRQ_USAGEFAULT, sam_usagefault);
|
|
|
|
irq_attach(SAM_IRQ_PENDSV, sam_pendsv);
|
|
|
|
irq_attach(SAM_IRQ_DBGMONITOR, sam_dbgmonitor);
|
|
|
|
irq_attach(SAM_IRQ_RESERVED, sam_reserved);
|
2010-01-03 14:01:35 +01:00
|
|
|
#endif
|
|
|
|
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_dumpnvic("initial", SAM_IRQ_NIRQS);
|
2010-01-03 14:01:35 +01:00
|
|
|
|
|
|
|
#ifndef CONFIG_SUPPRESS_INTERRUPTS
|
|
|
|
|
2010-01-23 04:05:05 +01:00
|
|
|
/* Initialize logic to support a second level of interrupt decoding for
|
|
|
|
* GPIO pins.
|
|
|
|
*/
|
2013-06-02 18:33:57 +02:00
|
|
|
|
2010-01-23 04:05:05 +01:00
|
|
|
#ifdef CONFIG_GPIO_IRQ
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_gpioirqinitialize();
|
2010-01-23 04:05:05 +01:00
|
|
|
#endif
|
|
|
|
|
2010-01-03 14:01:35 +01:00
|
|
|
/* And finally, enable interrupts */
|
|
|
|
|
2013-01-22 15:37:17 +01:00
|
|
|
irqenable();
|
2010-01-03 14:01:35 +01:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: up_disable_irq
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Disable the IRQ specified by 'irq'
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
void up_disable_irq(int irq)
|
|
|
|
{
|
|
|
|
uint32_t regaddr;
|
|
|
|
uint32_t regval;
|
|
|
|
uint32_t bit;
|
|
|
|
|
2013-06-02 21:04:40 +02:00
|
|
|
if (sam_irqinfo(irq, ®addr, &bit) == 0)
|
2010-01-03 14:01:35 +01:00
|
|
|
{
|
|
|
|
/* Clear the appropriate bit in the register to enable the interrupt */
|
|
|
|
|
|
|
|
regval = getreg32(regaddr);
|
|
|
|
regval &= ~bit;
|
|
|
|
putreg32(regval, regaddr);
|
|
|
|
}
|
2010-01-23 04:05:05 +01:00
|
|
|
#ifdef CONFIG_GPIO_IRQ
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Maybe it is a (derived) GPIO IRQ */
|
|
|
|
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_gpioirqdisable(irq);
|
2010-01-23 04:05:05 +01:00
|
|
|
}
|
|
|
|
#endif
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_dumpnvic("disable", irq);
|
2010-01-03 14:01:35 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: up_enable_irq
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Enable the IRQ specified by 'irq'
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
void up_enable_irq(int irq)
|
|
|
|
{
|
|
|
|
uint32_t regaddr;
|
|
|
|
uint32_t regval;
|
|
|
|
uint32_t bit;
|
|
|
|
|
2013-06-02 21:04:40 +02:00
|
|
|
if (sam_irqinfo(irq, ®addr, &bit) == 0)
|
2010-01-03 14:01:35 +01:00
|
|
|
{
|
|
|
|
/* Set the appropriate bit in the register to enable the interrupt */
|
|
|
|
|
|
|
|
regval = getreg32(regaddr);
|
|
|
|
regval |= bit;
|
|
|
|
putreg32(regval, regaddr);
|
|
|
|
}
|
2010-01-23 04:05:05 +01:00
|
|
|
#ifdef CONFIG_GPIO_IRQ
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Maybe it is a (derived) GPIO IRQ */
|
|
|
|
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_gpioirqenable(irq);
|
2010-01-23 04:05:05 +01:00
|
|
|
}
|
|
|
|
#endif
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_dumpnvic("enable", irq);
|
2010-01-03 14:01:35 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: up_maskack_irq
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Mask the IRQ and acknowledge it
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
void up_maskack_irq(int irq)
|
|
|
|
{
|
|
|
|
up_disable_irq(irq);
|
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: up_prioritize_irq
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Set the priority of an IRQ.
|
|
|
|
*
|
|
|
|
* Since this API is not supported on all architectures, it should be
|
|
|
|
* avoided in common implementations where possible.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
#ifdef CONFIG_ARCH_IRQPRIO
|
|
|
|
int up_prioritize_irq(int irq, int priority)
|
|
|
|
{
|
|
|
|
uint32_t regaddr;
|
|
|
|
uint32_t regval;
|
|
|
|
int shift;
|
|
|
|
|
2013-01-22 02:25:40 +01:00
|
|
|
#ifdef CONFIG_ARMV7M_USEBASEPRI
|
2013-06-02 18:33:57 +02:00
|
|
|
DEBUGASSERT(irq >= SAM_IRQ_MEMFAULT && irq < SAM_IRQ_NIRQS &&
|
2013-01-22 02:25:40 +01:00
|
|
|
priority >= NVIC_SYSH_DISABLE_PRIORITY &&
|
|
|
|
priority <= NVIC_SYSH_PRIORITY_MIN);
|
|
|
|
#else
|
2013-06-02 18:33:57 +02:00
|
|
|
DEBUGASSERT(irq >= SAM_IRQ_MEMFAULT && irq < SAM_IRQ_NIRQS &&
|
2013-01-22 02:25:40 +01:00
|
|
|
(unsigned)priority <= NVIC_SYSH_PRIORITY_MIN);
|
|
|
|
#endif
|
2010-01-03 14:01:35 +01:00
|
|
|
|
2013-06-02 18:33:57 +02:00
|
|
|
if (irq < SAM_IRQ_EXTINT)
|
2010-01-03 14:01:35 +01:00
|
|
|
{
|
2013-01-22 17:09:10 +01:00
|
|
|
/* NVIC_SYSH_PRIORITY() maps {0..15} to one of three priority
|
|
|
|
* registers (0-3 are invalid)
|
|
|
|
*/
|
|
|
|
|
2010-01-03 14:01:35 +01:00
|
|
|
regaddr = NVIC_SYSH_PRIORITY(irq);
|
2013-01-22 17:09:10 +01:00
|
|
|
irq -= 4;
|
2010-01-03 14:01:35 +01:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2013-01-22 17:09:10 +01:00
|
|
|
/* NVIC_IRQ_PRIORITY() maps {0..} to one of many priority registers */
|
|
|
|
|
2013-06-02 18:33:57 +02:00
|
|
|
irq -= SAM_IRQ_EXTINT;
|
2010-01-03 14:01:35 +01:00
|
|
|
regaddr = NVIC_IRQ_PRIORITY(irq);
|
|
|
|
}
|
|
|
|
|
|
|
|
regval = getreg32(regaddr);
|
|
|
|
shift = ((irq & 3) << 3);
|
|
|
|
regval &= ~(0xff << shift);
|
|
|
|
regval |= (priority << shift);
|
|
|
|
putreg32(regval, regaddr);
|
|
|
|
|
2013-06-02 21:04:40 +02:00
|
|
|
sam_dumpnvic("prioritize", irq);
|
2010-01-03 14:01:35 +01:00
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
#endif
|