113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* 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 Nios II specific nanokernel interface header
|
|
* This header contains the Nios II specific nanokernel interface. It is
|
|
* included by the generic nanokernel interface header (nanokernel.h)
|
|
*/
|
|
|
|
#ifndef _ARCH_IFACE_H
|
|
#define _ARCH_IFACE_H
|
|
|
|
#include <system.h>
|
|
#include "nios2.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define STACK_ALIGN 4
|
|
|
|
#define _NANO_ERR_HW_EXCEPTION (0) /* MPU/Bus/Usage fault */
|
|
#define _NANO_ERR_INVALID_TASK_EXIT (1) /* Invalid task exit */
|
|
#define _NANO_ERR_STACK_CHK_FAIL (2) /* Stack corruption detected */
|
|
#define _NANO_ERR_ALLOCATION_FAIL (3) /* Kernel Allocation Failure */
|
|
|
|
#ifndef _ASMLANGUAGE
|
|
#include <stdint.h>
|
|
#include <irq.h>
|
|
#include <arch/nios2/asm_inline.h>
|
|
|
|
/* STUB. Eventually port ARC/ARM interrupt stuff */
|
|
#define _ARCH_IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p)
|
|
|
|
static ALWAYS_INLINE unsigned int _arch_irq_lock(void)
|
|
{
|
|
unsigned int key;
|
|
|
|
key = _nios2_creg_read(NIOS2_CR_STATUS);
|
|
_nios2_creg_write(NIOS2_CR_STATUS, key & ~NIOS2_STATUS_PIE_MSK);
|
|
|
|
return key;
|
|
}
|
|
|
|
static ALWAYS_INLINE void _arch_irq_unlock(unsigned int key)
|
|
{
|
|
/* If the CPU is built without certain features, then
|
|
* the only writable bit in the status register is PIE
|
|
* in which case we can just write the value stored in key,
|
|
* all the other writable bits will be the same.
|
|
*
|
|
* If not, other stuff could have changed and we need to
|
|
* specifically flip just that bit.
|
|
*/
|
|
|
|
#if (NIOS2_NUM_OF_SHADOW_REG_SETS > 0) || \
|
|
(defined NIOS2_EIC_PRESENT) || \
|
|
(defined NIOS2_MMU_PRESENT) || \
|
|
(defined NIOS2_MPU_PRESENT)
|
|
uint32_t status_reg;
|
|
|
|
/* Interrupts were already locked when irq_lock() was called,
|
|
* so don't do anything
|
|
*/
|
|
if (!(key & NIOS2_STATUS_PIE_MSK))
|
|
return;
|
|
|
|
status_reg = _nios2_creg_read(NIOS2_CR_STATUS);
|
|
_nios2_creg_write(NIOS2_CR_STATUS, status_reg | NIOS2_STATUS_PIE_MSK);
|
|
#else
|
|
_nios2_creg_write(NIOS2_CR_STATUS, key);
|
|
#endif
|
|
}
|
|
|
|
int _arch_irq_connect_dynamic(unsigned int irq, unsigned int priority,
|
|
void (*routine)(void *parameter), void *parameter,
|
|
uint32_t flags);
|
|
void _arch_irq_enable(unsigned int irq);
|
|
void _arch_irq_disable(unsigned int irq);
|
|
|
|
struct __esf {
|
|
/* XXX - not defined yet */
|
|
uint32_t placeholder;
|
|
};
|
|
|
|
typedef struct __esf NANO_ESF;
|
|
extern const NANO_ESF _default_esf;
|
|
|
|
FUNC_NORETURN void _SysFatalErrorHandler(unsigned int reason,
|
|
const NANO_ESF *esf);
|
|
|
|
#endif /* _ASMLANGUAGE */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|