fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / mips / philips / pnx8550 / common / time.c

diff --git a/arch/mips/philips/pnx8550/common/time.c b/arch/mips/philips/pnx8550/common/time.c
index 70664ea..68def38 100644 (file)
--- a/arch/mips/philips/pnx8550/common/time.c
+++ b/arch/mips/philips/pnx8550/common/time.c
@@ -33,7 +33,17 @@
 #include <int.h>
 #include <cm.h>
 
-extern unsigned int mips_hpt_frequency;
+static unsigned long cpj;
+
+static cycle_t hpt_read(void)
+{
+       return read_c0_count2();
+}
+
+static void timer_ack(void)
+{
+       write_c0_compare(cpj);
+}
 
 /*
  * pnx8550_time_init() - it does the following things:
@@ -41,8 +51,8 @@ extern unsigned int mips_hpt_frequency;
  * 1) board_time_init() -
  *     a) (optional) set up RTC routines,
  *      b) (optional) calibrate and set the mips_hpt_frequency
- *         (only needed if you intended to use fixed_rate_gettimeoffset
- *          or use cpu counter as timer interrupt source)
+ *         (only needed if you intended to use cpu counter as timer interrupt
+ *          source)
  */
 
 void pnx8550_time_init(void)
@@ -68,36 +78,48 @@ void pnx8550_time_init(void)
         * HZ timer interrupts per second.
         */
        mips_hpt_frequency = 27UL * ((1000000UL * n)/(m * pow2p));
+       cpj = (mips_hpt_frequency + HZ / 2) / HZ;
+       write_c0_count(0);
+       timer_ack();
+
+       /* Setup Timer 2 */
+       write_c0_count2(0);
+       write_c0_compare2(0xffffffff);
+
+       clocksource_mips.read = hpt_read;
+       mips_timer_ack = timer_ack;
 }
 
-/*
- * pnx8550_timer_setup() - it does the following things:
- *
- * 5) board_timer_setup() -
- *     a) (optional) over-write any choices made above by time_init().
- *     b) machine specific code should setup the timer irqaction.
- *     c) enable the timer interrupt
- */
+static irqreturn_t monotonic_interrupt(int irq, void *dev_id)
+{
+       /* Timer 2 clear interrupt */
+       write_c0_compare2(-1);
+       return IRQ_HANDLED;
+}
 
-void __init pnx8550_timer_setup(struct irqaction *irq)
+static struct irqaction monotonic_irqaction = {
+       .handler = monotonic_interrupt,
+       .flags = IRQF_DISABLED,
+       .name = "Monotonic timer",
+};
+
+void __init plat_timer_setup(struct irqaction *irq)
 {
        int configPR;
 
        setup_irq(PNX8550_INT_TIMER1, irq);
+       setup_irq(PNX8550_INT_TIMER2, &monotonic_irqaction);
 
-       /* Start timer1 */
+       /* Timer 1 start */
        configPR = read_c0_config7();
        configPR &= ~0x00000008;
        write_c0_config7(configPR);
 
-       /* Timer 2 stop */
+       /* Timer 2 start */
        configPR = read_c0_config7();
-       configPR |= 0x00000010;
+       configPR &= ~0x00000010;
        write_c0_config7(configPR);
 
-       write_c0_count2(0);
-       write_c0_compare2(0xffffffff);
-
        /* Timer 3 stop */
        configPR = read_c0_config7();
        configPR |= 0x00000020;