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2346ae68c4
colinux64/patch/timer-2.6.25.diff
audy 2346ae68c4 clone from sourceforge
2025-02-13 19:09:34 -07:00

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Index: linux-2.6.25-source/arch/x86/kernel/timer_cooperative.c
===================================================================
--- /dev/null
+++ linux-2.6.25-source/arch/x86/kernel/timer_cooperative.c
@@ -0,0 +1,153 @@
+/*
+ * Cooperative mode timer.
+ *
+ * Dan Aloni <da-x@colinux.org>, 2003-2004 (C).
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/timer.h>
+#include <asm/delay.h>
+
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/cooperative.h>
+#include <linux/cooperative_internal.h>
+
+#define CO_CLOCK_SHIFT 20
+
+/* FSEC = 10^-15
+ NSEC = 10^-9 */
+#define FSEC_PER_NSEC 1000000
+
+/* 100Hz is fix from damons 10ms setup */
+#define CO_HOST_HZ 100
+
+unsigned int cpu_khz;
+EXPORT_SYMBOL(cpu_khz);
+
+/* unused here, but needed by linker */
+volatile unsigned long cmos_lock = 0;
+EXPORT_SYMBOL(cmos_lock);
+
+/*
+ * Functions copied from time.c
+ */
+unsigned long profile_pc(struct pt_regs *regs)
+{
+ unsigned long pc = instruction_pointer(regs);
+
+ return pc;
+}
+EXPORT_SYMBOL(profile_pc);
+
+/* Read system date and clock at startup */
+unsigned long read_persistent_clock(void)
+{
+ return co_get_host_time();
+}
+
+/* need by ntp.c */
+int update_persistent_clock(struct timespec now)
+{
+ return 0;
+}
+
+
+/*
+ * Clock source related code, based on arch/arm/mach-omap1/time.c
+ */
+
+static cycle_t query_host_highprec_time(void)
+{
+ unsigned long flags;
+ unsigned long long this_time;
+
+ co_passage_page_assert_valid();
+
+ co_passage_page_acquire(&flags);
+ co_passage_page->operation = CO_OPERATION_GET_HIGH_PREC_TIME;
+ co_switch_wrapper();
+ this_time = *(unsigned long long *)(&co_passage_page->params[0]);
+ co_passage_page_release(flags);
+
+ return this_time;
+}
+
+static struct clocksource co_clocksource = {
+ .name = "cooperative",
+ .rating = 450,
+ .read = query_host_highprec_time,
+ .mask = CLOCKSOURCE_MASK(64),
+ .shift = CO_CLOCK_SHIFT,
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+
+static void co_timer_setup(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+}
+
+struct clock_event_device co_clockevent = {
+ .name = "clock",
+ .features = CLOCK_EVT_FEAT_PERIODIC,
+ .set_mode = co_timer_setup,
+ .shift = CO_CLOCK_SHIFT,
+};
+
+static irqreturn_t co_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = &co_clockevent;
+
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction co_timer_irq = {
+ .name = "timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = co_timer_interrupt,
+};
+
+static void co_delay_loop(unsigned long loops)
+{
+ /*
+ * A bogos delay loop for creating BogoMIPS...
+ */
+
+ loops = loops / 0x10000;
+ while (loops) {
+ query_host_highprec_time();
+ loops -= 1;
+ }
+}
+
+extern void (*late_time_init)(void);
+static void co_register_timer(void)
+{
+ setup_irq(TIMER_IRQ, &co_timer_irq);
+}
+
+void __init time_init(void)
+{
+ u64 tmp;
+
+ tmp = (u64)CO_HOST_HZ << CO_CLOCK_SHIFT;
+ do_div(tmp, FSEC_PER_NSEC);
+ co_clockevent.mult = (u32)tmp;
+
+ co_clocksource.mult = clocksource_hz2mult(CO_HOST_HZ, CO_CLOCK_SHIFT);
+ co_clockevent.cpumask = cpumask_of_cpu(0);
+
+ clockevents_register_device(&co_clockevent);
+ late_time_init = co_register_timer;
+
+ setup_delay_function(co_delay_loop);
+
+ cpu_khz = co_boot_params.co_cpu_khz;
+}
+
Index: linux-2.6.25-source/arch/x86/lib/delay_32.c
===================================================================
--- linux-2.6.25-source.orig/arch/x86/lib/delay_32.c
+++ linux-2.6.25-source/arch/x86/lib/delay_32.c
@@ -40,6 +40,7 @@
:"0" (loops));
}
+#ifndef CONFIG_COOPERATIVE
/* TSC based delay: */
static void delay_tsc(unsigned long loops)
{
@@ -53,6 +54,7 @@
} while ((now-bclock) < loops);
preempt_enable();
}
+#endif
/*
* Since we calibrate only once at boot, this
@@ -60,6 +62,12 @@
*/
static void (*delay_fn)(unsigned long) = delay_loop;
+#ifdef CONFIG_COOPERATIVE
+void setup_delay_function(void (*fn)(unsigned long))
+{
+ delay_fn = fn;
+}
+#else
void use_tsc_delay(void)
{
delay_fn = delay_tsc;
@@ -73,6 +81,7 @@
}
return -1;
}
+#endif
void __delay(unsigned long loops)
{
Index: linux-2.6.25-source/arch/x86/mach-default/setup.c
===================================================================
--- linux-2.6.25-source.orig/arch/x86/mach-default/setup.c
+++ linux-2.6.25-source/arch/x86/mach-default/setup.c
@@ -83,6 +83,7 @@
{
}
+#ifndef CONFIG_COOPERATIVE
static struct irqaction irq0 = {
.handler = timer_interrupt,
.flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
@@ -102,6 +103,7 @@
irq0.mask = cpumask_of_cpu(0);
setup_irq(0, &irq0);
}
+#endif /* !CONFIG_COOPERATIVE */
#ifdef CONFIG_MCA
/**
Index: linux-2.6.25-source/include/asm-x86/delay.h
===================================================================
--- linux-2.6.25-source.orig/include/asm-x86/delay.h
+++ linux-2.6.25-source/include/asm-x86/delay.h
@@ -26,6 +26,10 @@
((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
__ndelay(n))
+#ifdef CONFIG_COOPERATIVE
+void setup_delay_function(void (*fn)(unsigned long));
+#else
void use_tsc_delay(void);
+#endif
#endif /* _ASM_X86_DELAY_H */
Index: linux-2.6.25-source/include/asm-x86/mach-default/do_timer.h
===================================================================
--- linux-2.6.25-source.orig/include/asm-x86/mach-default/do_timer.h
+++ linux-2.6.25-source/include/asm-x86/mach-default/do_timer.h
@@ -4,6 +4,7 @@
#include <asm/i8259.h>
#include <asm/i8253.h>
+#ifndef CONFIG_COOPERATIVE
/**
* do_timer_interrupt_hook - hook into timer tick
*
@@ -14,3 +15,4 @@
{
global_clock_event->event_handler(global_clock_event);
}
+#endif
Index: linux-2.6.25-source/include/asm-x86/timex.h
===================================================================
--- linux-2.6.25-source.orig/include/asm-x86/timex.h
+++ linux-2.6.25-source/include/asm-x86/timex.h
@@ -14,6 +14,8 @@
#endif
#define CLOCK_TICK_RATE PIT_TICK_RATE
+#ifndef CONFIG_COOPERATIVE
#define ARCH_HAS_READ_CURRENT_TIMER
+#endif /* !CONFIG_COOPERATIVE */
#endif
Index: linux-2.6.25-source/include/linux/timex.h
===================================================================
--- linux-2.6.25-source.orig/include/linux/timex.h
+++ linux-2.6.25-source/include/linux/timex.h
@@ -244,7 +244,9 @@
/* Don't use! Compatibility define for existing users. */
#define tickadj (500/HZ ? : 1)
+#ifndef CONFIG_COOPERATIVE
int read_current_timer(unsigned long *timer_val);
+#endif /* !CONFIG_COOPERATIVE */
#endif /* KERNEL */
Index: linux-2.6.25-source/include/asm-x86/msr.h
===================================================================
--- linux-2.6.25-source.orig/include/asm-x86/msr.h
+++ linux-2.6.25-source/include/asm-x86/msr.h
@@ -85,7 +85,12 @@
return err;
}
+#ifdef CONFIG_COOPERATIVE
+/* FIXME: */
+#define native_read_tsc() 0
+#else
extern unsigned long long native_read_tsc(void);
+#endif
static __always_inline unsigned long long __native_read_tsc(void)
{
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