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authorJoel Sherrill <joel.sherrill@OARcorp.com>2010-08-20 21:23:27 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2010-08-20 21:23:27 +0000
commit9bf3483559c2d223f4833173d803225bf1ca24df (patch)
tree2abf33352d0704f656698162231b4c3bb555d451 /c/src/lib/libbsp/lm32/shared/milkymist_clock/ckinit.c
parent2010-08-20 <yann.sionneau@telecom-sudparis.eu> (diff)
downloadrtems-9bf3483559c2d223f4833173d803225bf1ca24df.tar.bz2
2010-08-20 <yann.sionneau@telecom-sudparis.eu>
* shared/milkymist_ac97/ac97.c, shared/milkymist_clock/ckinit.c, shared/milkymist_clock/clock.h, shared/milkymist_console/console.c, shared/milkymist_console/uart.c, shared/milkymist_console/uart.h, shared/milkymist_framebuffer/framebuffer.c, shared/milkymist_gpio/gpio.c, shared/milkymist_networking/mm_crc32.c, shared/milkymist_networking/network.c, shared/milkymist_networking/network.h, shared/milkymist_timer/timer.c: New files.
Diffstat (limited to 'c/src/lib/libbsp/lm32/shared/milkymist_clock/ckinit.c')
-rw-r--r--c/src/lib/libbsp/lm32/shared/milkymist_clock/ckinit.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/lm32/shared/milkymist_clock/ckinit.c b/c/src/lib/libbsp/lm32/shared/milkymist_clock/ckinit.c
new file mode 100644
index 0000000000..eb28ead0cc
--- /dev/null
+++ b/c/src/lib/libbsp/lm32/shared/milkymist_clock/ckinit.c
@@ -0,0 +1,70 @@
+/* ckinit.c
+ *
+ * Clock device driver for Lattice Mico32 (lm32).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ * $Id$
+ *
+ * COPYRIGHT (c) Yann Sionneau <yann.sionneau@telecom-sudparis.eu> (GSoC 2010)
+ * Telecom SudParis
+ */
+
+#include <bsp.h>
+#include "../include/system_conf.h"
+#include "clock.h"
+#include "bspopts.h"
+
+#if ON_SIMULATOR
+#define CLOCK_DRIVER_USE_FAST_IDLE
+#endif
+
+static inline int clockread(unsigned int reg)
+{
+ return *((int*)(reg));
+}
+
+static inline void clockwrite(unsigned int reg, int value)
+{
+ *((int*)reg) = value;
+}
+
+/*
+ * The interrupt vector number associated with the clock tick device
+ * driver.
+ */
+
+#define TIMER0_IRQ (1)
+
+#define CLOCK_VECTOR ( TIMER0_IRQ )
+#define CLOCK_IRQMASK ( 1 << CLOCK_VECTOR )
+
+#define Clock_driver_support_at_tick() \
+ do { \
+ lm32_interrupt_ack(CLOCK_IRQMASK); \
+ } while (0)
+
+#define Clock_driver_support_install_isr(_new, _old ) \
+ do { \
+ _old = (rtems_isr_entry) set_vector( _new, CLOCK_VECTOR, 1 ); \
+ } while (0)
+
+void Clock_driver_support_initialize_hardware(void)
+{
+ clockwrite(MM_TIMER0_COMPARE, (CPU_FREQUENCY / (1000000 / rtems_configuration_get_microseconds_per_tick())));
+
+ clockwrite(MM_TIMER0_COUNTER, 0);
+ clockwrite(MM_TIMER0_CONTROL, TIMER_ENABLE | TIMER_AUTORESTART);
+ lm32_interrupt_unmask(CLOCK_IRQMASK);
+}
+
+void Clock_driver_support_shutdown_hardware(void)
+{
+ lm32_interrupt_mask(CLOCK_IRQMASK);
+ clockwrite(MM_TIMER0_CONTROL, 0);
+}
+
+#include "../../../shared/clockdrv_shell.h"
+