0caf3b8cae
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12881 a1c6a512-1295-4272-9138-f99709370657
214 lines
6.7 KiB
C
214 lines
6.7 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 Ulf Ralberg
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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 THREAD_H
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#define THREAD_H
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#include "config.h"
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#include <inttypes.h>
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#include <stdbool.h>
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/* Priority scheduling (when enabled with HAVE_PRIORITY_SCHEDULING) works
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* by giving high priority threads more CPU time than less priority threads
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* when they need it.
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*
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* If software playback codec pcm buffer is going down to critical, codec
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* can change it own priority to REALTIME to override user interface and
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* prevent playback skipping.
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*/
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#define PRIORITY_REALTIME 1
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#define PRIORITY_USER_INTERFACE 4 /* The main thread */
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#define PRIORITY_RECORDING 4 /* Recording thread */
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#define PRIORITY_PLAYBACK 4 /* or REALTIME when needed */
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#define PRIORITY_BUFFERING 4 /* Codec buffering thread */
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#define PRIORITY_SYSTEM 6 /* All other firmware threads */
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#define PRIORITY_BACKGROUND 8 /* Normal application threads */
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#if CONFIG_CODEC == SWCODEC
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#define MAXTHREADS 16
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#else
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#define MAXTHREADS 11
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#endif
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#define DEFAULT_STACK_SIZE 0x400 /* Bytes */
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#ifndef SIMULATOR
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/* Need to keep structures inside the header file because debug_menu
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* needs them. */
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# ifdef CPU_COLDFIRE
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struct regs
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{
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unsigned int macsr; /* EMAC status register */
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unsigned int d[6]; /* d2-d7 */
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unsigned int a[5]; /* a2-a6 */
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void *sp; /* Stack pointer (a7) */
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void *start; /* Thread start address, or NULL when started */
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};
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# elif CONFIG_CPU == SH7034
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struct regs
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{
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unsigned int r[7]; /* Registers r8 thru r14 */
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void *sp; /* Stack pointer (r15) */
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void *pr; /* Procedure register */
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void *start; /* Thread start address, or NULL when started */
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};
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# elif defined(CPU_ARM)
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struct regs
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{
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unsigned int r[8]; /* Registers r4-r11 */
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void *sp; /* Stack pointer (r13) */
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unsigned int lr; /* r14 (lr) */
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void *start; /* Thread start address, or NULL when started */
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};
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# endif
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#endif /* !SIMULATOR */
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#define STATE_RUNNING 0x00000000
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#define STATE_BLOCKED 0x20000000
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#define STATE_SLEEPING 0x40000000
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#define STATE_BLOCKED_W_TMO 0x60000000
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#define THREAD_STATE_MASK 0x60000000
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#define STATE_ARG_MASK 0x1FFFFFFF
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#define GET_STATE_ARG(state) (state & STATE_ARG_MASK)
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#define GET_STATE(state) (state & THREAD_STATE_MASK)
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#define SET_STATE(var,state,arg) (var = (state | ((arg) & STATE_ARG_MASK)))
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#define CLEAR_STATE_ARG(var) (var &= ~STATE_ARG_MASK)
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#define STATE_BOOSTED 0x80000000
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#define STATE_IS_BOOSTED(var) (var & STATE_BOOSTED)
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#define SET_BOOST_STATE(var) (var |= STATE_BOOSTED)
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struct thread_entry {
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#ifndef SIMULATOR
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struct regs context;
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#endif
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const char *name;
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void *stack;
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unsigned long statearg;
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unsigned short stack_size;
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#ifdef HAVE_PRIORITY_SCHEDULING
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unsigned short priority;
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unsigned long priority_x;
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long last_run;
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#endif
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struct thread_entry *next, *prev;
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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intptr_t retval;
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#endif
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};
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struct core_entry {
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struct thread_entry threads[MAXTHREADS];
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struct thread_entry *running;
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struct thread_entry *sleeping;
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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int switch_to_irq_level;
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#define STAY_IRQ_LEVEL -1
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#endif
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};
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#ifdef HAVE_PRIORITY_SCHEDULING
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#define IF_PRIO(empty, type) , type
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#else
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#define IF_PRIO(empty, type)
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#endif
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/* PortalPlayer chips have 2 cores, therefore need atomic mutexes
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* Just use it for ARM, Coldfire and whatever else well...why not?
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*/
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/* Macros generate better code than an inline function is this case */
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#if defined (CPU_PP) || defined (CPU_ARM)
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#define test_and_set(x_, v_) \
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({ \
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uint32_t old; \
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asm volatile ( \
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"swpb %[old], %[v], [%[x]] \r\n" \
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: [old]"=r"(old) \
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: [v]"r"((uint32_t)v_), [x]"r"((uint32_t *)x_) \
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); \
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old; \
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})
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#elif defined (CPU_COLDFIRE)
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#define test_and_set(x_, v_) \
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({ \
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uint8_t old; \
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asm volatile ( \
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"bset.l %[v], (%[x]) \r\n" \
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"sne.b %[old] \r\n" \
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: [old]"=d,d"(old) \
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: [v]"i,d"((uint32_t)v_), [x]"a,a"((uint32_t *)x_) \
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); \
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old; \
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})
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#else
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/* default for no asm version */
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#define test_and_set(x_, v_) \
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({ \
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uint32_t old = *(uint32_t *)x_; \
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*(uint32_t *)x_ = v_; \
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old; \
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})
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#endif
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struct thread_entry*
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create_thread(void (*function)(void), void* stack, int stack_size,
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const char *name IF_PRIO(, int priority)
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IF_COP(, unsigned int core, bool fallback));
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#ifdef HAVE_SCHEDULER_BOOSTCTRL
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void trigger_cpu_boost(void);
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#else
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#define trigger_cpu_boost()
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#endif
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void remove_thread(struct thread_entry *thread);
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void switch_thread(bool save_context, struct thread_entry **blocked_list);
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void sleep_thread(int ticks);
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void block_thread(struct thread_entry **thread);
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void block_thread_w_tmo(struct thread_entry **thread, int timeout);
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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void set_irq_level_and_block_thread(struct thread_entry **thread, int level);
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#if 0
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void set_irq_level_and_block_thread_w_tmo(struct thread_entry **list,
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int timeout, int level)
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#endif
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#endif
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void wakeup_thread(struct thread_entry **thread);
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#ifdef HAVE_PRIORITY_SCHEDULING
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int thread_set_priority(struct thread_entry *thread, int priority);
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int thread_get_priority(struct thread_entry *thread);
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/* Yield that guarantees thread execution once per round regardless of
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thread's scheduler priority - basically a transient realtime boost
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without altering the scheduler's thread precedence. */
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void priority_yield(void);
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#else
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#define priority_yield yield
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#endif /* HAVE_PRIORITY_SCHEDULING */
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struct thread_entry * thread_get_current(void);
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void init_threads(void);
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int thread_stack_usage(const struct thread_entry *thread);
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int thread_get_status(const struct thread_entry *thread);
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#ifdef RB_PROFILE
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void profile_thread(void);
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#endif
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#endif
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