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* Copyright (c) 2014 Wind River Systems, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* @brief ARC specific nanokernel interface header
*
* This header contains the ARC specific nanokernel interface. It is
* included by the nanokernel interface architecture-abstraction header
* (nanokernel/cpu.h)
*/
#ifndef _ARC_ARCH__H_
#define _ARC_ARCH__H_
#ifdef __cplusplus
extern "C" {
#endif
/* APIs need to support non-byte addressible architectures */
#define OCTET_TO_SIZEOFUNIT(X) (X)
#define SIZEOFUNIT_TO_OCTET(X) (X)
#include <sw_isr_table.h>
#ifdef CONFIG_CPU_ARCV2
#include <arch/arc/v2/exc.h>
#include <arch/arc/v2/irq.h>
#include <arch/arc/v2/ffs.h>
#include <arch/arc/v2/error.h>
#include <arch/arc/v2/misc.h>
#include <arch/arc/v2/aux_regs.h>
#include <arch/arc/v2/arcv2_irq_unit.h>
#include <arch/arc/v2/asm_inline.h>
#include <arch/arc/v2/addr_types.h>
#endif
#define STACK_ALIGN 4
#ifdef __cplusplus
}
#endif
#ifndef _ASMLANGUAGE
#include <irq.h>
/* internal routine documented in C file, needed by IRQ_CONNECT() macro */
extern void _irq_priority_set(unsigned int irq, unsigned int prio,
uint32_t flags);
/**
* Configure a static interrupt.
*
* All arguments must be computable by the compiler at build time.
*
* Internally this function does a few things:
*
* 1. The enum statement has no effect but forces the compiler to only
* accept constant values for the irq_p parameter, very important as the
* numerical IRQ line is used to create a named section.
*
* 2. An instance of _IsrTableEntry is created containing the ISR and its
* parameter. If you look at how _sw_isr_table is created, each entry in the
* array is in its own section named by the IRQ line number. What we are doing
* here is to override one of the default entries (which points to the
* spurious IRQ handler) with what was supplied here.
*
* 3. The priority level for the interrupt is configured by a call to
* _irq_priority_set()
*
* @param irq_p IRQ line number
* @param priority_p Interrupt priority, in range 0-13
* @param isr_p Interrupt service routine
* @param isr_param_p ISR parameter
* @param flags_p IRQ options (ignored for now)
*
* @return The vector assigned to this interrupt
*/
#define _ARCH_IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p) \
({ \
enum { IRQ = irq_p }; \
static struct _IsrTableEntry _CONCAT(_isr_irq, irq_p) \
__attribute__ ((used)) \
__attribute__ ((section(STRINGIFY(_CONCAT(.gnu.linkonce.isr_irq, irq_p))))) = \
{isr_param_p, isr_p}; \
_irq_priority_set(irq_p, priority_p, flags_p); \
irq_p; \
})
#endif
#endif /* _ARC_ARCH__H_ */
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