fed2c567af
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8050 a1c6a512-1295-4272-9138-f99709370657
102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Björn Stenberg
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _KERNEL_H_
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#define _KERNEL_H_
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#include <stdbool.h>
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#include "config.h"
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/* wrap-safe macros for tick comparison */
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#define TIME_AFTER(a,b) ((long)(b) - (long)(a) < 0)
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#define TIME_BEFORE(a,b) TIME_AFTER(b,a)
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#define HZ 100 /* number of ticks per second */
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#define MAX_NUM_TICK_TASKS 8
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#define QUEUE_LENGTH 16 /* MUST be a power of 2 */
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#define QUEUE_LENGTH_MASK (QUEUE_LENGTH - 1)
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/* System defined message ID's, occupying the top 5 bits of the event ID */
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#define SYS_EVENT (long)0x80000000 /* SYS events are negative */
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#define SYS_USB_CONNECTED ((SYS_EVENT | ((long)1 << 27)))
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#define SYS_USB_CONNECTED_ACK ((SYS_EVENT | ((long)2 << 27)))
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#define SYS_USB_DISCONNECTED ((SYS_EVENT | ((long)3 << 27)))
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#define SYS_USB_DISCONNECTED_ACK ((SYS_EVENT | ((long)4 << 27)))
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#define SYS_TIMEOUT ((SYS_EVENT | ((long)5 << 27)))
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#define SYS_MMC_INSERTED ((SYS_EVENT | ((long)6 << 27)))
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#define SYS_MMC_EXTRACTED ((SYS_EVENT | ((long)7 << 27)))
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#define SYS_POWEROFF ((SYS_EVENT | ((long)8 << 27)))
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#define SYS_FS_CHANGED ((SYS_EVENT | ((long)9 << 27)))
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#define SYS_CHARGER_CONNECTED ((SYS_EVENT | ((long)10 << 27)))
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#define SYS_CHARGER_DISCONNECTED ((SYS_EVENT | ((long)11 << 27)))
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struct event
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{
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long id;
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void *data;
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};
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struct event_queue
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{
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struct event events[QUEUE_LENGTH];
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unsigned int read;
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unsigned int write;
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};
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struct mutex
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{
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bool locked;
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};
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/* global tick variable */
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#if (CONFIG_CPU==PP5020)
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/* A temporary hack until timer interrupt is enabled - use the RTC */
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#define current_tick ((*((volatile long*)0x60005010))/10000)
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#else
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extern long current_tick;
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#endif
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#ifdef SIMULATOR
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#define sleep(x) sim_sleep(x)
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#endif
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/* kernel functions */
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extern void kernel_init(void);
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extern void yield(void);
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extern void sleep(int ticks);
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int tick_add_task(void (*f)(void));
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int tick_remove_task(void (*f)(void));
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extern void queue_init(struct event_queue *q);
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extern void queue_wait(struct event_queue *q, struct event *ev);
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extern void queue_wait_w_tmo(struct event_queue *q, struct event *ev, int ticks);
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extern void queue_post(struct event_queue *q, long id, void *data);
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extern bool queue_empty(const struct event_queue* q);
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void queue_clear(struct event_queue* q);
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extern int queue_broadcast(long id, void *data);
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extern void mutex_init(struct mutex *m);
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extern void mutex_lock(struct mutex *m);
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extern void mutex_unlock(struct mutex *m);
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extern void tick_start(unsigned int interval_in_ms);
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#define IS_SYSEVENT(ev) ((ev & SYS_EVENT) == SYS_EVENT)
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#endif
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