forked from len0rd/rockbox
Thread scheduler reworked to be less dependent on compiler behaviour. Stack overflow check is now possible on coldfire, enabled it. Unified code as much as possible.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6665 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold
parent
6b9350b4d3
commit
a4aa508bd0
1 changed files with 116 additions and 97 deletions
|
|
@ -29,15 +29,16 @@ struct regs
|
|||
unsigned int d[6]; /* d2-d7 */
|
||||
unsigned int a[5]; /* a2-a6 */
|
||||
void *sp; /* Stack pointer (a7) */
|
||||
void *start; /* Thread start address, or NULL when started */
|
||||
};
|
||||
#elif CONFIG_CPU == SH7034
|
||||
struct regs
|
||||
{
|
||||
unsigned int r[7]; /* Registers r8 thru r14 */
|
||||
void *sp; /* Stack pointer (r15) */
|
||||
void* pr; /* Procedure register */
|
||||
void *pr; /* Procedure register */
|
||||
void *start; /* Thread start address, or NULL when started */
|
||||
};
|
||||
|
||||
#elif CONFIG_CPU == TCC730
|
||||
struct regs
|
||||
{
|
||||
|
|
@ -74,7 +75,10 @@ static inline void load_context(const void* addr) __attribute__ ((always_inline)
|
|||
*/
|
||||
static inline void store_context(void* addr)
|
||||
{
|
||||
asm volatile ("movem.l %%d2-%%d7/%%a2-%%a7,(%0)\n\t" : : "a" (addr));
|
||||
asm volatile (
|
||||
"movem.l %%d2-%%d7/%%a2-%%a7,(%0)\n"
|
||||
: : "a" (addr)
|
||||
);
|
||||
}
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
|
|
@ -83,7 +87,16 @@ static inline void store_context(void* addr)
|
|||
*/
|
||||
static inline void load_context(const void* addr)
|
||||
{
|
||||
asm volatile ("movem.l (%0),%%d2-%%d7/%%a2-%%a7\n\t" : : "a" (addr));
|
||||
asm volatile (
|
||||
"movem.l (%0),%%d2-%%d7/%%a2-%%a7\n" /* Load context */
|
||||
"move.l (48,%0),%%d0 \n" /* Get start address */
|
||||
"beq.b .running \n" /* NULL -> already running */
|
||||
"clr.l (48,%0) \n" /* Clear start address.. */
|
||||
"move.l %%d0,%0 \n"
|
||||
"jmp (%0) \n" /* ..and start the thread */
|
||||
".running: \n"
|
||||
: : "a" (addr) : "d0" /* only! */
|
||||
);
|
||||
}
|
||||
|
||||
#elif CONFIG_CPU == SH7034
|
||||
|
|
@ -93,16 +106,19 @@ static inline void load_context(const void* addr)
|
|||
*/
|
||||
static inline void store_context(void* addr)
|
||||
{
|
||||
asm volatile ("add #36, %0\n\t"
|
||||
"sts.l pr, @-%0\n\t"
|
||||
"mov.l r15, @-%0\n\t"
|
||||
"mov.l r14, @-%0\n\t"
|
||||
"mov.l r13, @-%0\n\t"
|
||||
"mov.l r12, @-%0\n\t"
|
||||
"mov.l r11, @-%0\n\t"
|
||||
"mov.l r10, @-%0\n\t"
|
||||
"mov.l r9, @-%0\n\t"
|
||||
"mov.l r8, @-%0" : : "r" (addr));
|
||||
asm volatile (
|
||||
"add #36,%0 \n"
|
||||
"sts.l pr, @-%0 \n"
|
||||
"mov.l r15,@-%0 \n"
|
||||
"mov.l r14,@-%0 \n"
|
||||
"mov.l r13,@-%0 \n"
|
||||
"mov.l r12,@-%0 \n"
|
||||
"mov.l r11,@-%0 \n"
|
||||
"mov.l r10,@-%0 \n"
|
||||
"mov.l r9, @-%0 \n"
|
||||
"mov.l r8, @-%0 \n"
|
||||
: : "r" (addr)
|
||||
);
|
||||
}
|
||||
|
||||
/*---------------------------------------------------------------------------
|
||||
|
|
@ -111,18 +127,28 @@ static inline void store_context(void* addr)
|
|||
*/
|
||||
static inline void load_context(const void* addr)
|
||||
{
|
||||
asm volatile ("mov.l @%0+,r8\n\t"
|
||||
"mov.l @%0+,r9\n\t"
|
||||
"mov.l @%0+,r10\n\t"
|
||||
"mov.l @%0+,r11\n\t"
|
||||
"mov.l @%0+,r12\n\t"
|
||||
"mov.l @%0+,r13\n\t"
|
||||
"mov.l @%0+,r14\n\t"
|
||||
"mov.l @%0+,r15\n\t"
|
||||
"mov.l @%0,%0\n\t"
|
||||
"lds %0,pr\n\t"
|
||||
"mov.l %0, @(0, r15)" : "+r" (addr));
|
||||
asm volatile (
|
||||
"mov.l @%0+,r8 \n"
|
||||
"mov.l @%0+,r9 \n"
|
||||
"mov.l @%0+,r10 \n"
|
||||
"mov.l @%0+,r11 \n"
|
||||
"mov.l @%0+,r12 \n"
|
||||
"mov.l @%0+,r13 \n"
|
||||
"mov.l @%0+,r14 \n"
|
||||
"mov.l @%0+,r15 \n"
|
||||
"lds.l @%0+,pr \n"
|
||||
"mov.l @%0,r0 \n" /* Get start address */
|
||||
"tst r0,r0 \n"
|
||||
"bt .running \n" /* NULL -> already running */
|
||||
"lds r0,pr \n"
|
||||
"mov #0,r0 \n"
|
||||
"rts \n" /* Start the thread */
|
||||
"mov.l r0,@%0 \n" /* Clear start address */
|
||||
".running: \n"
|
||||
: : "r" (addr) : "r0" /* only! */
|
||||
);
|
||||
}
|
||||
|
||||
#elif CONFIG_CPU == TCC730
|
||||
/*---------------------------------------------------------------------------
|
||||
* Store non-volatile context.
|
||||
|
|
@ -177,7 +203,6 @@ static inline void load_context(const void* addr)
|
|||
void switch_thread(void)
|
||||
{
|
||||
int current;
|
||||
int next;
|
||||
unsigned int *stackptr;
|
||||
|
||||
#ifdef SIMULATOR
|
||||
|
|
@ -189,6 +214,9 @@ void switch_thread(void)
|
|||
/* Enter sleep mode, woken up on interrupt */
|
||||
#if CONFIG_CPU == MCF5249
|
||||
asm volatile ("stop #0x2000");
|
||||
#elif CONFIG_CPU == SH7034
|
||||
SBYCR &= 0x7F;
|
||||
asm volatile ("sleep");
|
||||
#elif CONFIG_CPU == TCC730
|
||||
/* Sleep mode is triggered by the SYS instr on CalmRisc16.
|
||||
* Unfortunately, the manual doesn't specify which arg to use.
|
||||
|
|
@ -196,28 +224,25 @@ void switch_thread(void)
|
|||
0x1f seems to trigger a reset;
|
||||
0x0f is the only one other argument used by Archos.
|
||||
*/
|
||||
#else
|
||||
SBYCR &= 0x7F;
|
||||
asm volatile ("sleep");
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif
|
||||
next = current = current_thread;
|
||||
|
||||
if (++next >= num_threads)
|
||||
next = 0;
|
||||
current_thread = next;
|
||||
current = current_thread;
|
||||
store_context(&thread_contexts[current]);
|
||||
|
||||
#if CONFIG_CPU != TCC730
|
||||
/* Check if the current thread stack is overflown */
|
||||
stackptr = thread_stack[current];
|
||||
#if ! (defined(IRIVER_H100) || (CONFIG_CPU == TCC730))
|
||||
if(stackptr[0] != DEADBEEF)
|
||||
panicf("Stkov %s", thread_name[current]);
|
||||
#endif
|
||||
|
||||
load_context(&thread_contexts[next]);
|
||||
if (++current >= num_threads)
|
||||
current = 0;
|
||||
|
||||
current_thread = current;
|
||||
load_context(&thread_contexts[current]);
|
||||
}
|
||||
|
||||
void sleep_thread(void)
|
||||
|
|
@ -260,23 +285,15 @@ int create_thread(void* function, void* stack, int stack_size,
|
|||
thread_stack[num_threads] = stack;
|
||||
thread_stack_size[num_threads] = stack_size;
|
||||
regs = &thread_contexts[num_threads];
|
||||
#if CONFIG_CPU == MCF5249
|
||||
store_context(regs);
|
||||
regs->sp = (void*)(((unsigned int)stack + stack_size - 4) & ~3);
|
||||
/* Put the return address on the stack */
|
||||
*(unsigned long *)(regs->sp) = (int)function;
|
||||
#elif CONFIG_CPU == SH7034
|
||||
store_context(regs);
|
||||
/* Subtract 4 to leave room for the PR push in load_context()
|
||||
Align it on an even 32 bit boundary */
|
||||
regs->sp = (void*)(((unsigned int)stack + stack_size - 4) & ~3);
|
||||
regs->pr = function;
|
||||
#if (CONFIG_CPU == MCF5249) || (CONFIG_CPU == SH7034)
|
||||
/* Align stack to an even 32 bit boundary */
|
||||
regs->sp = (void*)(((unsigned int)stack + stack_size) & ~3);
|
||||
#elif CONFIG_CPU == TCC730
|
||||
/* Align stack on word boundary */
|
||||
regs->sp = (void*)(((unsigned long)stack + stack_size - 2) & ~1);
|
||||
regs->start = (void*)function;
|
||||
regs->started = 0;
|
||||
#endif
|
||||
regs->start = (void*)function;
|
||||
|
||||
wake_up_thread();
|
||||
return num_threads++; /* return the current ID, e.g for remove_thread() */
|
||||
|
|
@ -316,7 +333,9 @@ void init_threads(void)
|
|||
thread_name[0] = main_thread_name;
|
||||
thread_stack[0] = stackbegin;
|
||||
thread_stack_size[0] = (int)stackend - (int)stackbegin;
|
||||
#if CONFIG_CPU == TCC730
|
||||
#if (CONFIG_CPU == MCF5249) || (CONFIG_CPU == SH7034)
|
||||
thread_contexts[0].start = 0; /* thread 0 already running */
|
||||
#elif CONFIG_CPU == TCC730
|
||||
thread_contexts[0].started = 1;
|
||||
#endif
|
||||
num_sleepers = 0;
|
||||
|
|
@ -336,6 +355,6 @@ int thread_stack_usage(int threadnum)
|
|||
break;
|
||||
}
|
||||
|
||||
return ((thread_stack_size[threadnum] - i * 4) * 100) /
|
||||
return ((thread_stack_size[threadnum] - i * sizeof(int)) * 100) /
|
||||
thread_stack_size[threadnum];
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue