121 lines
4.4 KiB
C
121 lines
4.4 KiB
C
|
|
// Copyright (c) 2003-2015 Cadence Design Systems, Inc.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining
|
|
// a copy of this software and associated documentation files (the
|
|
// "Software"), to deal in the Software without restriction, including
|
|
// without limitation the rights to use, copy, modify, merge, publish,
|
|
// distribute, sublicense, and/or sell copies of the Software, and to
|
|
// permit persons to whom the Software is furnished to do so, subject to
|
|
// the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included
|
|
// in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
|
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
|
|
#ifndef __XOS_INTERNAL_H__
|
|
#define __XOS_INTERNAL_H__
|
|
|
|
#if !defined(__XOS_H__) || !defined(_XOS_INCLUDE_INTERNAL_)
|
|
#error "xos_internal.h must be included by defining _XOS_INCLUDE_INTERNAL_ before including xos.h"
|
|
#endif
|
|
|
|
#include <xtensa/config/core.h>
|
|
#include "xos_common.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
// Use this macro to suppress compiler warnings for unused variables.
|
|
|
|
#define UNUSED(x) (void)(x)
|
|
|
|
|
|
#if XOS_DEBUG
|
|
|
|
#include <stdio.h>
|
|
#include <xtensa/xtutil.h>
|
|
# define DPRINTF printf
|
|
|
|
#else
|
|
|
|
# define DPRINTF(x...) do {} while(0)
|
|
|
|
#endif
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Internal flags for thread creation.
|
|
//-----------------------------------------------------------------------------
|
|
#define XOS_THREAD_FAKE 0x8000 // Don't allocate stack (init and idle threads).
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Interrupt handler table entry. This structure defines one entry in the XOS
|
|
// interrupt handler table.
|
|
//-----------------------------------------------------------------------------
|
|
typedef struct XosIntEntry {
|
|
XosIntFunc * handler; // Pointer to handler function.
|
|
void * arg; // Argument passed to handler function.
|
|
#if XOS_OPT_INTERRUPT_SWPRI
|
|
unsigned char level; // Interrupt level.
|
|
unsigned char priority; // Interrupt priority.
|
|
short reserved; // Reserved.
|
|
unsigned int primask; // Mask of interrupts at higher priority.
|
|
#else
|
|
unsigned int ps; // Value of PS when running the handler.
|
|
#endif
|
|
} XosIntEntry;
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Extern variables.
|
|
//-----------------------------------------------------------------------------
|
|
extern unsigned xos_intlevel_mask;
|
|
extern unsigned xos_intenable_mask;
|
|
extern XosIntEntry xos_interrupt_table[XCHAL_NUM_INTERRUPTS];
|
|
|
|
extern uint32_t xos_clock_freq;
|
|
extern uint32_t xos_tick_period;
|
|
extern uint64_t xos_system_ticks;
|
|
extern uint64_t xos_system_cycles;
|
|
extern uint32_t xos_num_ctx_switches;
|
|
|
|
|
|
/*
|
|
|
|
One thing I noticed is different between my initial idea of stack
|
|
assignments to RTC threads, when comparing to interrupts, is that I
|
|
expected each RTC thread priority to have its own stack, whereas
|
|
interrupts of different priorities share an interrupt stack.
|
|
|
|
It's not really a difference in memory usage, because when assigning
|
|
multiple priorities to a stack, you have to add-up worst-case for
|
|
all priorities. One possible functional difference is that with
|
|
separate stacks per priority, it's possible to dynamically change
|
|
the priority of an RTC thread (while it's running). Not sure how
|
|
valuable that might be -- changing priority is useful with priority
|
|
inheritance, to avoid priority inversion, but I don't know how often
|
|
an RTC thread might acquire a lock (it couldn't block on acquiring a
|
|
lock in the usual sense -- it could get queued waiting and be restarted
|
|
when it becomes available, or use try_lock instead of lock).
|
|
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __XOS_INTERNAL_H__ */
|
|
|