145 lines
4.3 KiB
C
145 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2016 Cadence Design Systems, Inc.
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Xtensa specific kernel interface header
|
|
* This header contains the Xtensa specific kernel interface. It is included
|
|
* by the generic kernel interface header (include/arch/cpu.h)
|
|
*/
|
|
|
|
#ifndef _ARCH_IFACE_H
|
|
#define _ARCH_IFACE_H
|
|
|
|
#include <irq.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include <generated_dts_board.h>
|
|
#if !defined(_ASMLANGUAGE) && !defined(__ASSEMBLER__)
|
|
#include "sys_io.h" /* Include from the very same folder of this file */
|
|
#include <zephyr/types.h>
|
|
#include <sw_isr_table.h>
|
|
#include <arch/xtensa/xtensa_irq.h>
|
|
#include <xtensa/config/core.h>
|
|
|
|
#define STACK_ALIGN 16
|
|
#define OCTET_TO_SIZEOFUNIT(X) (X)
|
|
#define SIZEOFUNIT_TO_OCTET(X) (X)
|
|
|
|
#define _NANO_ERR_HW_EXCEPTION (0) /* MPU/Bus/Usage fault */
|
|
#define _NANO_ERR_STACK_CHK_FAIL (2) /* Stack corruption detected */
|
|
#define _NANO_ERR_ALLOCATION_FAIL (3) /* Kernel Allocation Failure */
|
|
#define _NANO_ERR_RESERVED_IRQ (4) /* Reserved interrupt */
|
|
#define _NANO_ERR_KERNEL_OOPS (5) /* Kernel oops (fatal to thread) */
|
|
#define _NANO_ERR_KERNEL_PANIC (6) /* Kernel panic (fatal to system) */
|
|
|
|
/* Xtensa GPRs are often designated by two different names */
|
|
#define sys_define_gpr_with_alias(name1, name2) union { u32_t name1, name2; }
|
|
|
|
#include <arch/xtensa/exc.h>
|
|
|
|
/**
|
|
*
|
|
* @brief find most significant bit set in a 32-bit word
|
|
*
|
|
* This routine finds the first bit set starting from the most significant bit
|
|
* in the argument passed in and returns the index of that bit. Bits are
|
|
* numbered starting at 1 from the least significant bit. A return value of
|
|
* zero indicates that the value passed is zero.
|
|
*
|
|
* @return most significant bit set, 0 if @a op is 0
|
|
*/
|
|
|
|
static ALWAYS_INLINE unsigned int find_msb_set(u32_t op)
|
|
{
|
|
if (!op)
|
|
return 0;
|
|
return 32 - __builtin_clz(op);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @brief find least significant bit set in a 32-bit word
|
|
*
|
|
* This routine finds the first bit set starting from the least significant bit
|
|
* in the argument passed in and returns the index of that bit. Bits are
|
|
* numbered starting at 1 from the least significant bit. A return value of
|
|
* zero indicates that the value passed is zero.
|
|
*
|
|
* @return least significant bit set, 0 if @a op is 0
|
|
*/
|
|
|
|
static ALWAYS_INLINE unsigned int find_lsb_set(u32_t op)
|
|
{
|
|
return __builtin_ffs(op);
|
|
}
|
|
|
|
/* internal routine documented in C file, needed by IRQ_CONNECT() macro */
|
|
extern void _irq_priority_set(u32_t irq, u32_t prio, u32_t flags);
|
|
|
|
|
|
/**
|
|
* Configure a static interrupt.
|
|
*
|
|
* All arguments must be computable by the compiler at build time; if this
|
|
* can't be done use irq_connect_dynamic() instead.
|
|
*
|
|
* 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 _isr_table_entry 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
|
|
* @param isr_p Interrupt service routine
|
|
* @param isr_param_p ISR parameter
|
|
* @param flags_p IRQ options
|
|
*
|
|
* @return The vector assigned to this interrupt
|
|
*/
|
|
#define _ARCH_IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p) \
|
|
({ \
|
|
_ISR_DECLARE(irq_p, flags_p, isr_p, isr_param_p); \
|
|
irq_p; \
|
|
})
|
|
|
|
/* Spurious interrupt handler. Throws an error if called */
|
|
extern void _irq_spurious(void *unused);
|
|
|
|
#ifdef CONFIG_XTENSA_ASM2
|
|
#define XTENSA_ERR_NORET /**/
|
|
#else
|
|
#define XTENSA_ERR_NORET FUNC_NORETURN
|
|
#endif
|
|
|
|
XTENSA_ERR_NORET void _SysFatalErrorHandler(unsigned int reason,
|
|
const NANO_ESF *esf);
|
|
|
|
XTENSA_ERR_NORET void _NanoFatalErrorHandler(unsigned int reason,
|
|
const NANO_ESF *pEsf);
|
|
|
|
extern u32_t _timer_cycle_get_32(void);
|
|
#define _arch_k_cycle_get_32() _timer_cycle_get_32()
|
|
|
|
#endif /* !defined(_ASMLANGUAGE) && !defined(__ASSEMBLER__) */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _ARCH_IFACE_H */
|