178afc9caf
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12689 a1c6a512-1295-4272-9138-f99709370657
139 lines
4.9 KiB
C
139 lines
4.9 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2002 by Björn Stenberg
|
|
*
|
|
* All files in this archive are subject to the GNU General Public License.
|
|
* See the file COPYING in the source tree root for full license agreement.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
#ifndef _KERNEL_H_
|
|
#define _KERNEL_H_
|
|
|
|
#include <stdbool.h>
|
|
#include <inttypes.h>
|
|
#include "config.h"
|
|
|
|
/* wrap-safe macros for tick comparison */
|
|
#define TIME_AFTER(a,b) ((long)(b) - (long)(a) < 0)
|
|
#define TIME_BEFORE(a,b) TIME_AFTER(b,a)
|
|
|
|
#define HZ 100 /* number of ticks per second */
|
|
|
|
#define MAX_NUM_TICK_TASKS 8
|
|
|
|
#define QUEUE_LENGTH 16 /* MUST be a power of 2 */
|
|
#define QUEUE_LENGTH_MASK (QUEUE_LENGTH - 1)
|
|
|
|
/* System defined message ID's, occupying the top 5 bits of the event ID */
|
|
#define SYS_EVENT (long)0x80000000 /* SYS events are negative */
|
|
#define SYS_USB_CONNECTED ((SYS_EVENT | ((long)1 << 27)))
|
|
#define SYS_USB_CONNECTED_ACK ((SYS_EVENT | ((long)2 << 27)))
|
|
#define SYS_USB_DISCONNECTED ((SYS_EVENT | ((long)3 << 27)))
|
|
#define SYS_USB_DISCONNECTED_ACK ((SYS_EVENT | ((long)4 << 27)))
|
|
#define SYS_TIMEOUT ((SYS_EVENT | ((long)5 << 27)))
|
|
#define SYS_MMC_INSERTED ((SYS_EVENT | ((long)6 << 27)))
|
|
#define SYS_MMC_EXTRACTED ((SYS_EVENT | ((long)7 << 27)))
|
|
#define SYS_POWEROFF ((SYS_EVENT | ((long)8 << 27)))
|
|
#define SYS_FS_CHANGED ((SYS_EVENT | ((long)9 << 27)))
|
|
#define SYS_CHARGER_CONNECTED ((SYS_EVENT | ((long)10 << 27)))
|
|
#define SYS_CHARGER_DISCONNECTED ((SYS_EVENT | ((long)11 << 27)))
|
|
#define SYS_PHONE_PLUGGED ((SYS_EVENT | ((long)12 << 27)))
|
|
#define SYS_PHONE_UNPLUGGED ((SYS_EVENT | ((long)13 << 27)))
|
|
|
|
struct event
|
|
{
|
|
long id;
|
|
intptr_t data;
|
|
};
|
|
|
|
#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
|
|
struct queue_sender
|
|
{
|
|
struct thread_entry *thread;
|
|
intptr_t retval;
|
|
};
|
|
|
|
struct queue_sender_list
|
|
{
|
|
/* If non-NULL, there is a thread waiting for the corresponding event */
|
|
struct queue_sender *senders[QUEUE_LENGTH];
|
|
/* Send info for last message dequeued or NULL if replied or not sent */
|
|
struct queue_sender *curr_sender;
|
|
};
|
|
#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
|
|
|
|
struct event_queue
|
|
{
|
|
struct event events[QUEUE_LENGTH];
|
|
struct thread_entry *thread;
|
|
unsigned int read;
|
|
unsigned int write;
|
|
#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
|
|
struct queue_sender_list *send;
|
|
#endif
|
|
};
|
|
|
|
struct mutex
|
|
{
|
|
uint32_t locked;
|
|
struct thread_entry *thread;
|
|
};
|
|
|
|
/* global tick variable */
|
|
#if defined(CPU_PP) && defined(BOOTLOADER)
|
|
/* We don't enable interrupts in the iPod bootloader, so we need to fake
|
|
the current_tick variable */
|
|
#define current_tick (signed)(USEC_TIMER/10000)
|
|
#else
|
|
extern long current_tick;
|
|
#endif
|
|
|
|
#ifdef SIMULATOR
|
|
#define sleep(x) sim_sleep(x)
|
|
#endif
|
|
|
|
/* kernel functions */
|
|
extern void kernel_init(void);
|
|
extern void yield(void);
|
|
extern void sleep(int ticks);
|
|
int tick_add_task(void (*f)(void));
|
|
int tick_remove_task(void (*f)(void));
|
|
|
|
extern void queue_init(struct event_queue *q, bool register_queue);
|
|
extern void queue_delete(struct event_queue *q);
|
|
extern void queue_wait(struct event_queue *q, struct event *ev);
|
|
extern void queue_wait_w_tmo(struct event_queue *q, struct event *ev, int ticks);
|
|
extern void queue_post(struct event_queue *q, long id, intptr_t data);
|
|
#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
|
|
extern void queue_enable_queue_send(struct event_queue *q, struct queue_sender_list *send);
|
|
extern intptr_t queue_send(struct event_queue *q, long id, intptr_t data);
|
|
extern void queue_reply(struct event_queue *q, intptr_t retval);
|
|
extern bool queue_in_queue_send(struct event_queue *q);
|
|
#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
|
|
extern bool queue_empty(const struct event_queue* q);
|
|
extern void queue_clear(struct event_queue* q);
|
|
extern void queue_remove_from_head(struct event_queue *q, long id);
|
|
extern int queue_broadcast(long id, intptr_t data);
|
|
|
|
extern void mutex_init(struct mutex *m);
|
|
static inline void spinlock_init(struct mutex *m)
|
|
{ mutex_init(m); } /* Same thing for now */
|
|
extern void mutex_lock(struct mutex *m);
|
|
extern void mutex_unlock(struct mutex *m);
|
|
extern void spinlock_lock(struct mutex *m);
|
|
extern void spinlock_unlock(struct mutex *m);
|
|
extern void tick_start(unsigned int interval_in_ms);
|
|
|
|
#define IS_SYSEVENT(ev) ((ev & SYS_EVENT) == SYS_EVENT)
|
|
|
|
#endif
|