devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

Add CPU-model-specific init to newborn threads. Add default %macsr for each thread created on coldfire (EMAC_FRACTIONAL | EMAC_SATURATE).

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12483 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2007-02-25 21:43:10 +00:00
parent f5184f34bf
commit 2c9cbc12e1
2 changed files with 20 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

7
firmware/target/coldfire/system-coldfire.c
View file

@ -234,16 +234,13 @@ void (* const vbr[]) (void) __attribute__ ((section (".vectors"))) =
void system_init(void)
{
/* Clear the accumulators. From here on it's the responsibility of
whoever uses them to clear them after use (use movclr instruction). */
whoever uses them to clear them after use and before giving control
to "foreign" code (use movclr instruction). */
asm volatile ("movclr.l %%acc0, %%d0\n\t"
"movclr.l %%acc1, %%d0\n\t"
"movclr.l %%acc2, %%d0\n\t"
"movclr.l %%acc3, %%d0\n\t"
: : : "d0");
/* Set EMAC unit to fractional mode with saturation, since that's
what'll be the most useful for most things which the main thread
will do. */
coldfire_set_macsr(EMAC_FRACTIONAL | EMAC_SATURATE);
/* Set INTBASE and SPURVEC */
INTBASE = 64;

18
firmware/thread.c
View file

@ -141,6 +141,13 @@ static inline void load_context(const void* addr)
);
}
/* Set EMAC unit to fractional mode with saturation for each new thread,
since that's what'll be the most useful for most things which the dsp
will do. Codecs should still initialize their preferred modes
explicitly. */
#define THREAD_CPU_INIT(core, thread) \
({ (thread)->context.macsr = EMAC_FRACTIONAL | EMAC_SATURATE; })
#elif CONFIG_CPU == SH7034
/*---------------------------------------------------------------------------
* Store non-volatile context.
@ -193,6 +200,11 @@ static inline void load_context(const void* addr)
#endif
#ifndef THREAD_CPU_INIT
/* No cpu specific init - make empty */
#define THREAD_CPU_INIT(core, thread)
#endif
static void add_to_list(struct thread_entry **list, struct thread_entry *thread)
{
if (*list == NULL)
@ -660,6 +672,10 @@ struct thread_entry*
regs->sp = (void*)(((unsigned int)stack + stack_size) & ~3);
regs->start = (void*)function;
/* Do any CPU specific inits after initializing common items
to have access to valid data */
THREAD_CPU_INIT(core, thread);
return thread;
}
@ -753,10 +769,12 @@ void init_threads(void)
* probably a much better way to do this. */
if (core == CPU)
{
THREAD_CPU_INIT(core, &cores[CPU].threads[0]);
cores[CPU].threads[0].stack = stackbegin;
cores[CPU].threads[0].stack_size = (int)stackend - (int)stackbegin;
} else {
#if NUM_CORES > 1 /* This code path will not be run on single core targets */
THREAD_CPU_INIT(core, &cores[COP].threads[0]);
cores[COP].threads[0].stack = cop_stackbegin;
cores[COP].threads[0].stack_size =
(int)cop_stackend - (int)cop_stackbegin;