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PNX0101 changes:

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Make PNX0101-specific system.c and crt0.S.
Add new register names from LPC2880 user manual.
Add support for timer.
Enable CPU frequency changing. 


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12904 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Tomasz Malesinski 2007-03-24 19:26:13 +00:00
parent 7d9ff93b79
commit cd630c9e0a
12 changed files with 795 additions and 127 deletions
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48
firmware/timer.c
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@ -28,7 +28,7 @@ static void (*pfn_timer)(void) = NULL; /* timer callback */
static void (*pfn_unregister)(void) = NULL; /* unregister callback */
#ifdef CPU_COLDFIRE
static int base_prescale;
#elif defined CPU_PP
#elif defined CPU_PP || CONFIG_CPU == PNX0101
static long cycles_new = 0;
#endif
@ -67,6 +67,24 @@ void TIMER2(void)
cycles_new = 0;
}
}
#elif CONFIG_CPU == PNX0101
void TIMER1_ISR(void)
{
if (cycles_new > 0)
{
TIMER1.load = cycles_new - 1;
cycles_new = 0;
}
if (pfn_timer != NULL)
{
cycles_new = -1;
/* "lock" the variable, in case timer_set_period()
* is called within pfn_timer() */
pfn_timer();
cycles_new = 0;
}
TIMER1.clr = 1; /* clear the interrupt */
}
#endif /* CONFIG_CPU */
static bool timer_set(long cycles, bool start)
@ -85,8 +103,26 @@ static bool timer_set(long cycles, bool start)
}
#endif
#if CONFIG_CPU == PNX0101 /* TODO: Implement for iFP */
(void)start;
#if CONFIG_CPU == PNX0101
if (start)
{
if (pfn_unregister != NULL)
{
pfn_unregister();
pfn_unregister = NULL;
}
TIMER1.ctrl &= ~0x80; /* disable the counter */
TIMER1.ctrl |= 0x40; /* reload after counting down to zero */
TIMER1.ctrl &= ~0xc; /* no prescaler */
TIMER1.clr = 1; /* clear an interrupt event */
}
if (start || (cycles_new == -1)) /* within isr, cycles_new is "locked" */
{ /* enable timer */
TIMER1.load = cycles - 1;
TIMER1.ctrl |= 0x80; /* enable the counter */
}
else
cycles_new = cycles;
#endif
#if CONFIG_CPU == SH7034
@ -229,6 +265,9 @@ bool timer_register(int reg_prio, void (*unregister_callback)(void),
#elif defined(CPU_PP)
/* unmask interrupt source */
CPU_INT_EN = TIMER2_MASK;
#elif CONFIG_CPU == PNX0101
irq_set_int_handler(IRQ_TIMER1, TIMER1_ISR);
irq_enable_int(IRQ_TIMER1);
#endif
return true;
}
@ -249,6 +288,9 @@ void timer_unregister(void)
#elif defined(CPU_PP)
TIMER2_CFG = 0; /* stop timer 2 */
CPU_INT_CLR = TIMER2_MASK;
#elif CONFIG_CPU == PNX0101
TIMER1.ctrl &= ~0x80; /* disable timer 1 */
irq_disable_int(5);
#endif
pfn_timer = NULL;
pfn_unregister = NULL;