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This diff has been restricted to the following files: 'timer.c'

#
# old_revision [d8ed90db2d4284a290224447c40a0d9cef3fbc31]
# new_revision [1dfe3b7eee76f3c8aea3b33932857682ee17701c]
#
# add_file "timer.c"
#  content [9ef2a6c50a8a227103c6c98477c1ce62327a0977]
#
============================================================
--- /dev/null	
+++ timer.c	9ef2a6c50a8a227103c6c98477c1ce62327a0977
@@ -0,0 +1,101 @@
+#include "timer.h"
+#include "interrupt.h"
+#include "uart.h"
+#include "event.h"
+
+#define TIMER0BASE  0xE0004000
+#define TIMER1BASE  0xE0008000
+
+#define IR    0x00
+#define TCR   0x04
+#define TC    0x08
+#define PR    0x0c
+#define PC    0x10
+#define MCR   0x14
+#define MR0   0x18
+#define MR1   0x1C
+#define MR2   0x20
+#define MR3   0x24
+#define CCR   0x28
+#define CR0   0x2C
+#define CR1   0x30
+#define CR2   0x34
+#define CR3   0x38
+#define EMR   0x3C
+#define CTCR  0x70
+#define PWM   0x74
+
+#define TREG(x) (((volatile unsigned char *)TIMER0BASE)[x])
+#define TWREG(x) (((volatile unsigned int *)TIMER0BASE)[(x)/sizeof(unsigned int)])
+
+#define TCR_ENABLE (1<<0)
+#define TCR_RESET  (1<<1)
+
+#define MR0I (1<<0)
+#define MR0R (1<<1)
+#define MR0S (1<<2)
+#define MR1I (1<<3)
+#define MR1R (1<<4)
+#define MR1S (1<<5)
+#define MR2I (1<<6)
+#define MR2R (1<<7)
+#define MR2S (1<<8)
+#define MR3I (1<<9)
+#define MR3R (1<<10)
+#define MR3S (1<<11)
+
+void __attribute__((interrupt("IRQ"))) timer_interrupt_handler(void);
+
+void timer_event_handler(void);
+
+void init_timer(void)
+{
+	TREG(TCR) = TCR_ENABLE | TCR_RESET;
+
+	TREG(CTCR) = 0; /* Use PCLK */
+	TWREG(TC) = 0;
+	TWREG(PR) = TIMER_PRESCALE ;
+	TWREG(PC) = 0;
+
+	TREG(TCR) = TCR_ENABLE;
+	event_register(EVENT_TIMER, timer_event_handler);
+}
+
+unsigned int timer_read(void)
+{
+	return TWREG(TC);
+}
+
+void timer_delay_clocks(unsigned int clocks)
+{
+	signed int time = TWREG(TC) + clocks;
+	while (((signed int) (time-TWREG(TC))) > 0);
+}
+
+void timer_set_period(unsigned int period)
+{
+	TWREG(MR0) = period;
+	TWREG(MCR) = MR0I | MR0R;
+	interrupt_register(TIMER0, timer_interrupt_handler);
+}
+
+void __attribute__((interrupt("IRQ"))) timer_interrupt_handler(void)
+{
+	unsigned int ir;
+	ir = TREG(IR);
+	TREG(IR) = ir;
+
+	if (ir & (1<<0)) {
+		/* Match channel 0 */
+		putstr(" *timer0* ");
+	}
+
+	event_set(EVENT_TIMER);
+
+	interrupt_clear();
+}
+
+void timer_event_handler(void)
+{
+	putstr(" *t0event* ");
+}