aboutsummaryrefslogtreecommitdiff
path: root/firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/intc.c
diff options
context:
space:
mode:
authorDavid Madison <dmadison@users.noreply.github.com>2019-02-15 12:08:19 -0500
committerDavid Madison <dmadison@users.noreply.github.com>2019-02-15 12:08:31 -0500
commit4a7ef06b516dba4cdda939a16e5458c59592f6b1 (patch)
treeb00e15e665a2f456c1fb207aeb9ac12283181a00 /firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/intc.c
parent98f00eb533e0ed571b90f8e014d1eb59052a0597 (diff)
Delete 'firmwares' folder
Diffstat (limited to 'firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/intc.c')
-rw-r--r--firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/intc.c214
1 files changed, 0 insertions, 214 deletions
diff --git a/firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/intc.c b/firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/intc.c
deleted file mode 100644
index 84d498d..0000000
--- a/firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/intc.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/* This source file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */
-
-/*This file is prepared for Doxygen automatic documentation generation.*/
-/*! \file *********************************************************************
- *
- * \brief INTC driver for AVR32 UC3.
- *
- * AVR32 Interrupt Controller driver module.
- *
- * - Compiler: IAR EWAVR32 and GNU GCC for AVR32
- * - Supported devices: All AVR32 devices with an INTC module can be used.
- * - AppNote:
- *
- * \author Atmel Corporation: http://www.atmel.com \n
- * Support and FAQ: http://support.atmel.no/
- *
- ******************************************************************************/
-
-/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an Atmel
- * AVR product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
- *
- */
-
-#include <avr32/io.h>
-#include "compiler.h"
-#include "preprocessor.h"
-#include "intc.h"
-
-// define _evba from exception.S
-extern void _evba;
-
-//! Values to store in the interrupt priority registers for the various interrupt priority levels.
-extern const unsigned int ipr_val[AVR32_INTC_NUM_INT_LEVELS];
-
-//! Creates a table of interrupt line handlers per interrupt group in order to optimize RAM space.
-//! Each line handler table contains a set of pointers to interrupt handlers.
-#if (defined __GNUC__)
-#define DECL_INT_LINE_HANDLER_TABLE(GRP, unused) \
-static volatile __int_handler _int_line_handler_table_##GRP[Max(AVR32_INTC_NUM_IRQS_PER_GRP##GRP, 1)];
-#elif (defined __ICCAVR32__)
-#define DECL_INT_LINE_HANDLER_TABLE(GRP, unused) \
-static volatile __no_init __int_handler _int_line_handler_table_##GRP[Max(AVR32_INTC_NUM_IRQS_PER_GRP##GRP, 1)];
-#endif
-MREPEAT(AVR32_INTC_NUM_INT_GRPS, DECL_INT_LINE_HANDLER_TABLE, ~);
-#undef DECL_INT_LINE_HANDLER_TABLE
-
-//! Table containing for each interrupt group the number of interrupt request
-//! lines and a pointer to the table of interrupt line handlers.
-static const struct
-{
- unsigned int num_irqs;
- volatile __int_handler *_int_line_handler_table;
-} _int_handler_table[AVR32_INTC_NUM_INT_GRPS] =
-{
-#define INSERT_INT_LINE_HANDLER_TABLE(GRP, unused) \
- {AVR32_INTC_NUM_IRQS_PER_GRP##GRP, _int_line_handler_table_##GRP},
- MREPEAT(AVR32_INTC_NUM_INT_GRPS, INSERT_INT_LINE_HANDLER_TABLE, ~)
-#undef INSERT_INT_LINE_HANDLER_TABLE
-};
-
-
-/*! \brief Default interrupt handler.
- *
- * \note Taken and adapted from Newlib.
- */
-#if (defined __GNUC__)
-__attribute__((__interrupt__))
-#elif (defined __ICCAVR32__)
-__interrupt
-#endif
-static void _unhandled_interrupt(void)
-{
- // Catch unregistered interrupts.
- while (TRUE);
-}
-
-
-/*! \brief Gets the interrupt handler of the current event at the \a int_level
- * interrupt priority level (called from exception.S).
- *
- * \param int_level Interrupt priority level to handle.
- *
- * \return Interrupt handler to execute.
- *
- * \note Taken and adapted from Newlib.
- */
-__int_handler _get_interrupt_handler(unsigned int int_level)
-{
- // ICR3 is mapped first, ICR0 last.
- // Code in exception.S puts int_level in R12 which is used by AVR32-GCC to
- // pass a single argument to a function.
- unsigned int int_grp = AVR32_INTC.icr[AVR32_INTC_INT3 - int_level];
- unsigned int int_req = AVR32_INTC.irr[int_grp];
-
- // As an interrupt may disappear while it is being fetched by the CPU
- // (spurious interrupt caused by a delayed response from an MCU peripheral to
- // an interrupt flag clear or interrupt disable instruction), check if there
- // are remaining interrupt lines to process.
- // If a spurious interrupt occurs, the status register (SR) contains an
- // execution mode and interrupt level masks corresponding to a level 0
- // interrupt, whatever the interrupt priority level causing the spurious
- // event. This behavior has been chosen because a spurious interrupt has not
- // to be a priority one and because it may not cause any trouble to other
- // interrupts.
- // However, these spurious interrupts place the hardware in an unstable state
- // and could give problems in other/future versions of the CPU, so the
- // software has to be written so that they never occur. The only safe way of
- // achieving this is to always clear or disable peripheral interrupts with the
- // following sequence:
- // 1: Mask the interrupt in the CPU by setting GM (or IxM) in SR.
- // 2: Perform the bus access to the peripheral register that clears or
- // disables the interrupt.
- // 3: Wait until the interrupt has actually been cleared or disabled by the
- // peripheral. This is usually performed by reading from a register in the
- // same peripheral (it DOES NOT have to be the same register that was
- // accessed in step 2, but it MUST be in the same peripheral), what takes
- // bus system latencies into account, but peripheral internal latencies
- // (generally 0 cycle) also have to be considered.
- // 4: Unmask the interrupt in the CPU by clearing GM (or IxM) in SR.
- // Note that steps 1 and 4 are useless inside interrupt handlers as the
- // corresponding interrupt level is automatically masked by IxM (unless IxM is
- // explicitly cleared by the software).
- //
- // Get the right IRQ handler.
- //
- // If several interrupt lines are active in the group, the interrupt line with
- // the highest number is selected. This is to be coherent with the
- // prioritization of interrupt groups performed by the hardware interrupt
- // controller.
- //
- // If no handler has been registered for the pending interrupt,
- // _unhandled_interrupt will be selected thanks to the initialization of
- // _int_line_handler_table_x by INTC_init_interrupts.
- //
- // exception.S will provide the interrupt handler with a clean interrupt stack
- // frame, with nothing more pushed onto the stack. The interrupt handler must
- // manage the `rete' instruction, what can be done thanks to pure assembly,
- // inline assembly or the `__attribute__((__interrupt__))' C function
- // attribute.
- return (int_req) ? _int_handler_table[int_grp]._int_line_handler_table[32 - clz(int_req) - 1] : NULL;
-}
-
-//! Init EVBA address. This sequence might also be done in the UTILS/STARTUP/GCC/crt0.S
-static __inline__ void INTC_init_evba(void)
-{
- Set_system_register(AVR32_EVBA, (int)&_evba );
-}
-
-void INTC_init_interrupts(void)
-{
- unsigned int int_grp, int_req;
-
- INTC_init_evba();
-
- // For all interrupt groups,
- for (int_grp = 0; int_grp < AVR32_INTC_NUM_INT_GRPS; int_grp++)
- {
- // For all interrupt request lines of each group,
- for (int_req = 0; int_req < _int_handler_table[int_grp].num_irqs; int_req++)
- {
- // Assign _unhandled_interrupt as default interrupt handler.
- _int_handler_table[int_grp]._int_line_handler_table[int_req] = &_unhandled_interrupt;
- }
-
- // Set the interrupt group priority register to its default value.
- // By default, all interrupt groups are linked to the interrupt priority
- // level 0 and to the interrupt vector _int0.
- AVR32_INTC.ipr[int_grp] = ipr_val[AVR32_INTC_INT0];
- }
-}
-
-
-void INTC_register_interrupt(__int_handler handler, unsigned int irq, unsigned int int_level)
-{
- // Determine the group of the IRQ.
- unsigned int int_grp = irq / AVR32_INTC_MAX_NUM_IRQS_PER_GRP;
-
- // Store in _int_line_handler_table_x the pointer to the interrupt handler, so
- // that _get_interrupt_handler can retrieve it when the interrupt is vectored.
- _int_handler_table[int_grp]._int_line_handler_table[irq % AVR32_INTC_MAX_NUM_IRQS_PER_GRP] = handler;
-
- // Program the corresponding IPRX register to set the interrupt priority level
- // and the interrupt vector offset that will be fetched by the core interrupt
- // system.
- // NOTE: The _intx functions are intermediate assembly functions between the
- // core interrupt system and the user interrupt handler.
- AVR32_INTC.ipr[int_grp] = ipr_val[int_level & (AVR32_INTC_IPR_INTLEVEL_MASK >> AVR32_INTC_IPR_INTLEVEL_OFFSET)];
-}