forked from len0rd/rockbox
66258a30a4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12926 a1c6a512-1295-4272-9138-f99709370657
143 lines
5.1 KiB
C
143 lines
5.1 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 <inttypes.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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#define SYS_PHONE_PLUGGED ((SYS_EVENT | ((long)12 << 27)))
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#define SYS_PHONE_UNPLUGGED ((SYS_EVENT | ((long)13 << 27)))
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struct event
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{
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long id;
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intptr_t data;
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};
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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struct queue_sender_list
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{
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/* If non-NULL, there is a thread waiting for the corresponding event */
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/* Must be statically allocated to put in non-cached ram. */
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struct thread_entry *senders[QUEUE_LENGTH];
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/* Send info for last message dequeued or NULL if replied or not sent */
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struct thread_entry *curr_sender;
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};
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#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
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struct event_queue
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{
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struct event events[QUEUE_LENGTH];
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struct thread_entry *thread;
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unsigned int read;
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unsigned int write;
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#if NUM_CORES > 1
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bool irq_safe;
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#endif
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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struct queue_sender_list *send;
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#endif
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};
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struct mutex
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{
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uint32_t locked;
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struct thread_entry *thread;
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};
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/* global tick variable */
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#if defined(CPU_PP) && defined(BOOTLOADER)
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/* We don't enable interrupts in the iPod bootloader, so we need to fake
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the current_tick variable */
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#define current_tick (signed)(USEC_TIMER/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, bool register_queue);
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#if NUM_CORES > 1
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extern void queue_set_irq_safe(struct event_queue *q, bool state);
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#else
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#define queue_set_irq_safe(q,state)
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#endif
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extern void queue_delete(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, intptr_t data);
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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extern void queue_enable_queue_send(struct event_queue *q, struct queue_sender_list *send);
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extern intptr_t queue_send(struct event_queue *q, long id, intptr_t data);
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extern void queue_reply(struct event_queue *q, intptr_t retval);
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extern bool queue_in_queue_send(struct event_queue *q);
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#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
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extern bool queue_empty(const struct event_queue* q);
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extern void queue_clear(struct event_queue* q);
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extern void queue_remove_from_head(struct event_queue *q, long id);
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extern int queue_count(const struct event_queue *q);
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extern int queue_broadcast(long id, intptr_t data);
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extern void mutex_init(struct mutex *m);
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static inline void spinlock_init(struct mutex *m)
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{ mutex_init(m); } /* Same thing for now */
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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 spinlock_lock(struct mutex *m);
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extern void spinlock_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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