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-rw-r--r--c/src/lib/libcpu/powerpc/ppc403/clock/clock.c166
1 files changed, 53 insertions, 113 deletions
diff --git a/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c b/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c
index d684f12c38..6ac56a4851 100644
--- a/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c
+++ b/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c
@@ -52,18 +52,18 @@
#include <bsp/vectors.h>
#include <bsp/irq.h>
-extern uint32_t bsp_clicks_per_usec;
-extern bool bsp_timer_internal_clock;
+extern uint32_t bsp_clicks_per_usec;
+extern bool bsp_timer_internal_clock;
-volatile uint32_t Clock_driver_ticks;
+volatile uint32_t Clock_driver_ticks;
static uint32_t pit_value, tick_time;
-static bool auto_restart;
+static bool auto_restart;
void Clock_exit( void );
-static inline uint32_t get_itimer(void)
+static inline uint32_t get_itimer(void)
{
- register uint32_t rc;
+ register uint32_t rc;
#ifndef ppc405 /* this is a ppc403 */
__asm__ volatile ("mfspr %0, 0x3dd" : "=r" ((rc))); /* TBLO */
@@ -77,15 +77,15 @@ static inline uint32_t get_itimer(void)
/*
* ISR Handler
*/
-void Clock_isr(void* handle)
+static void Clock_isr(void* handle)
{
- uint32_t clicks_til_next_interrupt;
+ uint32_t clicks_til_next_interrupt;
#if defined(BSP_PPC403_CLOCK_ISR_IRQ_LEVEL)
- uint32_t l_orig = _ISR_Get_level();
+ uint32_t l_orig = _ISR_Get_level();
#endif
if (!auto_restart) {
- uint32_t itimer_value;
+ uint32_t itimer_value;
/*
* setup for next interrupt; making sure the new value is reasonably
* in the future.... in case we lost out on an interrupt somehow
@@ -106,7 +106,6 @@ void Clock_isr(void* handle)
* This should only happen if CPU_HPPA_CLICKS_PER_TICK is too small.
* But setting it low is useful for debug, so...
*/
-
if (clicks_til_next_interrupt < 400) {
tick_time = itimer_value + 1000;
clicks_til_next_interrupt = 1000;
@@ -117,27 +116,17 @@ void Clock_isr(void* handle)
* If it is too late, that means we missed the interrupt somehow.
* Rather than wait 35-50s for a wrap, we just fudge it here.
*/
-
if (clicks_til_next_interrupt > pit_value) {
tick_time = itimer_value + 1000;
clicks_til_next_interrupt = 1000;
/* XXX: count these! this should never happen :-) */
}
-#ifndef ppc440
__asm__ volatile ("mtspr 0x3db, %0" :: "r"
- (clicks_til_next_interrupt)); /* PIT */
-#else
- __asm__ volatile ("mtspr 0x016, %0" :: "r"
- (clicks_til_next_interrupt)); /* Decrementer */
-#endif
+ (clicks_til_next_interrupt)); /* PIT */
}
-#ifndef ppc440
- __asm__ volatile ( "mtspr 0x3d8, %0" :: "r" (0x08000000)); /* TSR */
-#else /* Book E */
- __asm__ volatile ( "mtspr 0x150, %0" :: "r" (0x08000000)); /* TSR */
-#endif
+ __asm__ volatile ("mtspr 0x3d8, %0" :: "r" (0x08000000)); /* TSR */
Clock_driver_ticks++;
@@ -152,123 +141,94 @@ void Clock_isr(void* handle)
#endif
}
-int ClockIsOn(const rtems_irq_connect_data* unused)
+static int ClockIsOn(const rtems_irq_connect_data* unused)
{
- register uint32_t tcr;
+ register uint32_t tcr;
-#ifndef ppc440
- __asm__ volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */
-#else /* Book E */
- __asm__ volatile ("mfspr %0, 0x154" : "=r" ((tcr))); /* TCR */
-#endif
+ __asm__ volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */
return (tcr & 0x04000000) != 0;
}
-void ClockOff(const rtems_irq_connect_data* unused)
+static void ClockOff(const rtems_irq_connect_data* unused)
{
- register uint32_t tcr;
+ register uint32_t tcr;
-#ifndef ppc440
- __asm__ volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */
+ __asm__ volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */
tcr &= ~ 0x04400000;
__asm__ volatile ("mtspr 0x3da, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */
-#else /* Book E */
- __asm__ volatile ("mfspr %0, 0x154" : "=r" ((tcr))); /* TCR */
- tcr &= ~ 0x04400000;
- __asm__ volatile ("mtspr 0x154, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */
-#endif
}
-void ClockOn(const rtems_irq_connect_data* unused)
+static void ClockOn(const rtems_irq_connect_data* unused)
{
- uint32_t iocr;
- register uint32_t tcr;
-#ifdef ppc403
- uint32_t pvr;
+ uint32_t iocr;
+ register uint32_t tcr;
+#ifndef ppc405
+ uint32_t pvr;
#endif /* ppc403 */
Clock_driver_ticks = 0;
-#ifdef ppc403 /* this is a ppc403 */
- __asm__ volatile ("mfdcr %0, 0xa0" : "=r" (iocr)); /* IOCR */
+#ifndef ppc405 /* this is a ppc403 */
+ __asm__ volatile ("mfdcr %0, 0xa0" : "=r" (iocr)); /* IOCR */
if (bsp_timer_internal_clock) {
- iocr &= ~4; /* timer clocked from system clock */
+ iocr &= ~4; /* timer clocked from system clock */
} else {
- iocr |= 4; /* select external timer clock */
+ iocr |= 4; /* select external timer clock */
}
__asm__ volatile ("mtdcr 0xa0, %0" : "=r" (iocr) : "0" (iocr)); /* IOCR */
__asm__ volatile ("mfspr %0, 0x11f" : "=r" ((pvr))); /* PVR */
if (((pvr & 0xffff0000) >> 16) != 0x0020)
- return; /* Not a ppc403 */
+ return; /* Not a ppc403 */
- if ((pvr & 0xff00) == 0x0000) /* 403GA */
+ if ((pvr & 0xff00) == 0x0000) /* 403GA */
#if 0 /* FIXME: in which processor versions will "autoload" work properly? */
- auto_restart = (pvr & 0x00f0) > 0x0000 ? true : false;
+ auto_restart = (pvr & 0x00f0) > 0x0000 ? true : false;
#else
- /* no known chip version supports auto restart of timer... */
- auto_restart = false;
+ /* no known chip version supports auto restart of timer... */
+ auto_restart = false;
#endif
- else if ((pvr & 0xff00) == 0x0100) /* 403GB */
- auto_restart = true;
+ else if ((pvr & 0xff00) == 0x0100) /* 403GB */
+ auto_restart = true;
-#elif defined(ppc405) /* ppc405 */
- __asm__ volatile ("mfdcr %0, 0x0b2" : "=r" (iocr)); /*405GP CPC0_CR1 */
+#else /* ppc405 */
+ __asm__ volatile ("mfdcr %0, 0x0b2" : "=r" (iocr)); /*405GP CPC0_CR1 */
if (bsp_timer_internal_clock) {
- iocr &=~0x800000; /* timer clocked from system clock CETE */
+ iocr &=~0x800000; /* timer clocked from system clock CETE*/
} else {
- iocr |= 0x800000; /* select external timer clock CETE */
+ iocr |= 0x800000; /* select external timer clock CETE*/
}
- /* 405GP CPC0_CR1 */
- __asm__ volatile ("mtdcr 0x0b2, %0" : "=r" (iocr) : "0" (iocr));
+ __asm__ volatile ("mtdcr 0x0b2, %0" : "=r" (iocr) : "0" (iocr)); /* 405GP CPC0_CR1 */
/*
* Enable auto restart
*/
auto_restart = true;
-#else
- /* PPC440 */
- __asm__ volatile ("mfspr %0, 0x378" : "=r" (iocr)); /* 440 CCR1 */
- if (bsp_timer_internal_clock) {
- iocr &= ~0x00000100; /* timer clocked from system clock CETE */
- } else {
- iocr |= 0x00000100; /* select external timer clock CETE */
- }
- __asm__ volatile ("mtspr 0x378, %0" : "=r" (iocr) : "0" (iocr)); /*440 CCR1*/
-#endif
+#endif /* ppc405 */
+
pit_value = rtems_configuration_get_microseconds_per_tick() *
bsp_clicks_per_usec;
/*
* Set PIT value
*/
-#ifndef ppc440
__asm__ volatile ("mtspr 0x3db, %0" : : "r" (pit_value)); /* PIT */
-#else /* Book E */
- __asm__ volatile ("mtspr 0x016, %0" : : "r" (pit_value)); /* Decrementer */
-#endif
- /*
- * Set timer to autoreload, bit TCR->ARE = 1 0x0400000
- * Enable PIT interrupt, bit TCR->PIE = 1 0x4000000
- */
+ /*
+ * Set timer to autoreload, bit TCR->ARE = 1 0x0400000
+ * Enable PIT interrupt, bit TCR->PIE = 1 0x4000000
+ */
tick_time = get_itimer() + pit_value;
-#ifndef ppc440
- __asm__ volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */
+ __asm__ volatile ("mfspr %0, 0x3da" : "=r" ((tcr))); /* TCR */
tcr = (tcr & ~0x04400000) | (auto_restart ? 0x04400000 : 0x04000000);
+#if 1
__asm__ volatile ("mtspr 0x3da, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */
-#else /* Book E */
- __asm__ volatile ("mfspr %0, 0x154" : "=r" ((tcr))); /* TCR */
- tcr = (tcr & ~0x04400000) | (auto_restart ? 0x04400000 : 0x04000000);
- __asm__ volatile ("mtspr 0x154, %0" : "=r" ((tcr)) : "0" ((tcr))); /* TCR */
#endif
}
-void Install_clock(
- void (*clock_isr)(void *)
-)
+void Install_clock(void (*clock_isr)(void *))
{
rtems_irq_connect_data clockIrqConnData;
@@ -284,11 +244,7 @@ void Install_clock(
clockIrqConnData.on = ClockOn;
clockIrqConnData.off = ClockOff;
clockIrqConnData.isOn = ClockIsOn;
-#if defined(ppc440) || defined(ppc405)
clockIrqConnData.name = BSP_PIT;
-#else
- clockIrqConnData.name = BSP_DECREMENTER;
-#endif
clockIrqConnData.hdl = clock_isr;
if (!BSP_install_rtems_irq_handler (&clockIrqConnData)) {
printk("Unable to connect Clock Irq handler\n");
@@ -298,20 +254,14 @@ void Install_clock(
atexit(Clock_exit);
}
-void ReInstall_clock(
- void (*new_clock_isr)(void *)
-)
+void ReInstall_clock(void (*new_clock_isr)(void *))
{
- uint32_t isrlevel = 0;
+ uint32_t isrlevel = 0;
rtems_irq_connect_data clockIrqConnData;
rtems_interrupt_disable(isrlevel);
-#if defined(ppc440) || defined(ppc405)
clockIrqConnData.name = BSP_PIT;
-#else
- clockIrqConnData.name = BSP_DECREMENTER;
-#endif
if (!BSP_get_current_rtems_irq_handler(&clockIrqConnData)) {
printk("Unable to stop system clock\n");
rtems_fatal_error_occurred(1);
@@ -322,11 +272,7 @@ void ReInstall_clock(
clockIrqConnData.on = ClockOn;
clockIrqConnData.off = ClockOff;
clockIrqConnData.isOn = ClockIsOn;
-#if defined(ppc440) || defined(ppc405)
clockIrqConnData.name = BSP_PIT;
-#else
- clockIrqConnData.name = BSP_DECREMENTER;
-#endif
clockIrqConnData.hdl = new_clock_isr;
if (!BSP_install_rtems_irq_handler (&clockIrqConnData)) {
@@ -348,11 +294,7 @@ void Clock_exit(void)
{
rtems_irq_connect_data clockIrqConnData;
-#if defined(ppc440) || defined(ppc405)
clockIrqConnData.name = BSP_PIT;
-#else
- clockIrqConnData.name = BSP_DECREMENTER;
-#endif
if (!BSP_get_current_rtems_irq_handler(&clockIrqConnData)) {
printk("Unable to stop system clock\n");
rtems_fatal_error_occurred(1);
@@ -361,11 +303,9 @@ void Clock_exit(void)
BSP_remove_rtems_irq_handler (&clockIrqConnData);
}
-rtems_device_driver Clock_initialize(
- rtems_device_major_number major,
- rtems_device_minor_number minor,
- void *pargp
-)
+rtems_device_driver Clock_initialize(rtems_device_major_number major,
+ rtems_device_minor_number minor,
+ void *pargp)
{
Install_clock( Clock_isr );
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 23:59:46 +0000