[ARM] 4187/1: iop: unify time implementation across iop32x, iop33x, and iop13xx
* architecture specific details are handled in asm/arch/time.h
* ARCH_IOP13XX now selects PLAT_IOP
* as suggested by Lennert use ifdef CONFIG_XSCALE to skip the cp_wait on
XSC3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-iop13xx/Makefile b/arch/arm/mach-iop13xx/Makefile
index c3d6c08..4185e058 100644
--- a/arch/arm/mach-iop13xx/Makefile
+++ b/arch/arm/mach-iop13xx/Makefile
@@ -5,7 +5,6 @@
obj-$(CONFIG_ARCH_IOP13XX) += setup.o
obj-$(CONFIG_ARCH_IOP13XX) += irq.o
-obj-$(CONFIG_ARCH_IOP13XX) += time.o
obj-$(CONFIG_ARCH_IOP13XX) += pci.o
obj-$(CONFIG_ARCH_IOP13XX) += io.o
obj-$(CONFIG_MACH_IQ81340SC) += iq81340sc.o
diff --git a/arch/arm/mach-iop13xx/iq81340mc.c b/arch/arm/mach-iop13xx/iq81340mc.c
index 2a1bbfe..a519d707 100644
--- a/arch/arm/mach-iop13xx/iq81340mc.c
+++ b/arch/arm/mach-iop13xx/iq81340mc.c
@@ -25,6 +25,7 @@
#include <asm/mach/arch.h>
#include <asm/arch/pci.h>
#include <asm/mach/time.h>
+#include <asm/arch/time.h>
extern int init_atu; /* Flag to select which ATU(s) to initialize / disable */
@@ -78,12 +79,12 @@
static void __init iq81340mc_timer_init(void)
{
- iop13xx_init_time(400000000);
+ iop_init_time(400000000);
}
static struct sys_timer iq81340mc_timer = {
.init = iq81340mc_timer_init,
- .offset = iop13xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
MACHINE_START(IQ81340MC, "Intel IQ81340MC")
diff --git a/arch/arm/mach-iop13xx/iq81340sc.c b/arch/arm/mach-iop13xx/iq81340sc.c
index 5ad2b62..0e71fbc 100644
--- a/arch/arm/mach-iop13xx/iq81340sc.c
+++ b/arch/arm/mach-iop13xx/iq81340sc.c
@@ -25,6 +25,7 @@
#include <asm/mach/arch.h>
#include <asm/arch/pci.h>
#include <asm/mach/time.h>
+#include <asm/arch/time.h>
extern int init_atu;
@@ -80,12 +81,12 @@
static void __init iq81340sc_timer_init(void)
{
- iop13xx_init_time(400000000);
+ iop_init_time(400000000);
}
static struct sys_timer iq81340sc_timer = {
.init = iq81340sc_timer_init,
- .offset = iop13xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
MACHINE_START(IQ81340SC, "Intel IQ81340SC")
diff --git a/arch/arm/mach-iop13xx/time.c b/arch/arm/mach-iop13xx/time.c
deleted file mode 100644
index fc9d9d9..0000000
--- a/arch/arm/mach-iop13xx/time.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * arch/arm/mach-iop13xx/time.c
- *
- * Timer code for IOP13xx (copied from IOP32x/IOP33x implementation)
- *
- * Author: Deepak Saxena <dsaxena@mvista.com>
- *
- * Copyright 2002-2003 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/init.h>
-#include <linux/timex.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/mach/irq.h>
-#include <asm/mach/time.h>
-
-static unsigned long ticks_per_jiffy;
-static unsigned long ticks_per_usec;
-static unsigned long next_jiffy_time;
-
-static inline u32 read_tcr1(void)
-{
- u32 val;
- asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
- return val;
-}
-
-unsigned long iop13xx_gettimeoffset(void)
-{
- unsigned long offset;
-
- offset = next_jiffy_time - read_tcr1();
-
- return offset / ticks_per_usec;
-}
-
-static irqreturn_t
-iop13xx_timer_interrupt(int irq, void *dev_id)
-{
- write_seqlock(&xtime_lock);
-
- asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (1));
-
- while ((signed long)(next_jiffy_time - read_tcr1())
- >= ticks_per_jiffy) {
- timer_tick();
- next_jiffy_time -= ticks_per_jiffy;
- }
-
- write_sequnlock(&xtime_lock);
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction iop13xx_timer_irq = {
- .name = "IOP13XX Timer Tick",
- .handler = iop13xx_timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_TIMER,
-};
-
-void __init iop13xx_init_time(unsigned long tick_rate)
-{
- u32 timer_ctl;
-
- ticks_per_jiffy = (tick_rate + HZ/2) / HZ;
- ticks_per_usec = tick_rate / 1000000;
- next_jiffy_time = 0xffffffff;
-
- timer_ctl = IOP13XX_TMR_EN | IOP13XX_TMR_PRIVILEGED |
- IOP13XX_TMR_RELOAD | IOP13XX_TMR_RATIO_1_1;
-
- /*
- * We use timer 0 for our timer interrupt, and timer 1 as
- * monotonic counter for tracking missed jiffies.
- */
- asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (ticks_per_jiffy - 1));
- asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (timer_ctl));
- asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (0xffffffff));
- asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (timer_ctl));
-
- setup_irq(IRQ_IOP13XX_TIMER0, &iop13xx_timer_irq);
-}
diff --git a/arch/arm/mach-iop32x/glantank.c b/arch/arm/mach-iop32x/glantank.c
index b9b7650..45f4f13 100644
--- a/arch/arm/mach-iop32x/glantank.c
+++ b/arch/arm/mach-iop32x/glantank.c
@@ -31,6 +31,7 @@
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
+#include <asm/arch/time.h>
/*
* GLAN Tank timer tick configuration.
@@ -38,12 +39,12 @@
static void __init glantank_timer_init(void)
{
/* 33.333 MHz crystal. */
- iop3xx_init_time(200000000);
+ iop_init_time(200000000);
}
static struct sys_timer glantank_timer = {
.init = glantank_timer_init,
- .offset = iop3xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
diff --git a/arch/arm/mach-iop32x/iq31244.c b/arch/arm/mach-iop32x/iq31244.c
index be4aedf..571ac35 100644
--- a/arch/arm/mach-iop32x/iq31244.c
+++ b/arch/arm/mach-iop32x/iq31244.c
@@ -36,7 +36,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
-
+#include <asm/arch/time.h>
/*
* The EP80219 and IQ31244 use the same machine ID. To find out
@@ -56,16 +56,16 @@
{
if (is_80219()) {
/* 33.333 MHz crystal. */
- iop3xx_init_time(200000000);
+ iop_init_time(200000000);
} else {
/* 33.000 MHz crystal. */
- iop3xx_init_time(198000000);
+ iop_init_time(198000000);
}
}
static struct sys_timer iq31244_timer = {
.init = iq31244_timer_init,
- .offset = iop3xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
diff --git a/arch/arm/mach-iop32x/iq80321.c b/arch/arm/mach-iop32x/iq80321.c
index 1f37b55..361c70c 100644
--- a/arch/arm/mach-iop32x/iq80321.c
+++ b/arch/arm/mach-iop32x/iq80321.c
@@ -33,6 +33,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
+#include <asm/arch/time.h>
/*
* IQ80321 timer tick configuration.
@@ -40,12 +41,12 @@
static void __init iq80321_timer_init(void)
{
/* 33.333 MHz crystal. */
- iop3xx_init_time(200000000);
+ iop_init_time(200000000);
}
static struct sys_timer iq80321_timer = {
.init = iq80321_timer_init,
- .offset = iop3xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
diff --git a/arch/arm/mach-iop32x/n2100.c b/arch/arm/mach-iop32x/n2100.c
index 2499a77..92fa0c5 100644
--- a/arch/arm/mach-iop32x/n2100.c
+++ b/arch/arm/mach-iop32x/n2100.c
@@ -37,6 +37,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
+#include <asm/arch/time.h>
/*
* N2100 timer tick configuration.
@@ -44,12 +45,12 @@
static void __init n2100_timer_init(void)
{
/* 33.000 MHz crystal. */
- iop3xx_init_time(198000000);
+ iop_init_time(198000000);
}
static struct sys_timer n2100_timer = {
.init = n2100_timer_init,
- .offset = iop3xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
diff --git a/arch/arm/mach-iop33x/iq80331.c b/arch/arm/mach-iop33x/iq80331.c
index 97a7b74..1a9e361 100644
--- a/arch/arm/mach-iop33x/iq80331.c
+++ b/arch/arm/mach-iop33x/iq80331.c
@@ -32,6 +32,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
+#include <asm/arch/time.h>
/*
* IQ80331 timer tick configuration.
@@ -40,14 +41,14 @@
{
/* D-Step parts run at a higher internal bus frequency */
if (*IOP3XX_ATURID >= 0xa)
- iop3xx_init_time(333000000);
+ iop_init_time(333000000);
else
- iop3xx_init_time(266000000);
+ iop_init_time(266000000);
}
static struct sys_timer iq80331_timer = {
.init = iq80331_timer_init,
- .offset = iop3xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
diff --git a/arch/arm/mach-iop33x/iq80332.c b/arch/arm/mach-iop33x/iq80332.c
index 9887bfc..96d6f0f 100644
--- a/arch/arm/mach-iop33x/iq80332.c
+++ b/arch/arm/mach-iop33x/iq80332.c
@@ -32,6 +32,7 @@
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
+#include <asm/arch/time.h>
/*
* IQ80332 timer tick configuration.
@@ -40,14 +41,14 @@
{
/* D-Step parts and the iop333 run at a higher internal bus frequency */
if (*IOP3XX_ATURID >= 0xa || *IOP3XX_ATUDID == 0x374)
- iop3xx_init_time(333000000);
+ iop_init_time(333000000);
else
- iop3xx_init_time(266000000);
+ iop_init_time(266000000);
}
static struct sys_timer iq80332_timer = {
.init = iq80332_timer_init,
- .offset = iop3xx_gettimeoffset,
+ .offset = iop_gettimeoffset,
};
diff --git a/arch/arm/plat-iop/Makefile b/arch/arm/plat-iop/Makefile
index 3250d73..4d2b1da 100644
--- a/arch/arm/plat-iop/Makefile
+++ b/arch/arm/plat-iop/Makefile
@@ -24,6 +24,7 @@
# IOP13XX
obj-$(CONFIG_ARCH_IOP13XX) += cp6.o
+obj-$(CONFIG_ARCH_IOP13XX) += time.o
obj-m :=
obj-n :=
diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c
index 0d53b81..16300ad 100644
--- a/arch/arm/plat-iop/time.c
+++ b/arch/arm/plat-iop/time.c
@@ -24,37 +24,45 @@
#include <asm/uaccess.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
-
-#ifdef CONFIG_ARCH_IOP32X
-#define IRQ_IOP3XX_TIMER0 IRQ_IOP32X_TIMER0
-#else
-#ifdef CONFIG_ARCH_IOP33X
-#define IRQ_IOP3XX_TIMER0 IRQ_IOP33X_TIMER0
-#endif
-#endif
+#include <asm/arch/time.h>
static unsigned long ticks_per_jiffy;
static unsigned long ticks_per_usec;
static unsigned long next_jiffy_time;
-unsigned long iop3xx_gettimeoffset(void)
+unsigned long iop_gettimeoffset(void)
{
- unsigned long offset;
+ unsigned long offset, temp1, temp2;
- offset = next_jiffy_time - *IOP3XX_TU_TCR1;
+ /* enable cp6, if necessary, to avoid taking the overhead of an
+ * undefined instruction trap
+ */
+ asm volatile (
+ "mrc p15, 0, %0, c15, c1, 0\n\t"
+ "ands %1, %0, #(1 << 6)\n\t"
+ "orreq %0, %0, #(1 << 6)\n\t"
+ "mcreq p15, 0, %0, c15, c1, 0\n\t"
+#ifdef CONFIG_XSCALE
+ "mrceq p15, 0, %0, c15, c1, 0\n\t"
+ "moveq %0, %0\n\t"
+ "subeq pc, pc, #4\n\t"
+#endif
+ : "=r"(temp1), "=r"(temp2) : : "cc");
+
+ offset = next_jiffy_time - read_tcr1();
return offset / ticks_per_usec;
}
static irqreturn_t
-iop3xx_timer_interrupt(int irq, void *dev_id)
+iop_timer_interrupt(int irq, void *dev_id)
{
write_seqlock(&xtime_lock);
- asm volatile("mcr p6, 0, %0, c6, c1, 0" : : "r" (1));
+ write_tisr(1);
- while ((signed long)(next_jiffy_time - *IOP3XX_TU_TCR1)
- >= ticks_per_jiffy) {
+ while ((signed long)(next_jiffy_time - read_tcr1())
+ >= ticks_per_jiffy) {
timer_tick();
next_jiffy_time -= ticks_per_jiffy;
}
@@ -64,13 +72,13 @@
return IRQ_HANDLED;
}
-static struct irqaction iop3xx_timer_irq = {
- .name = "IOP3XX Timer Tick",
- .handler = iop3xx_timer_interrupt,
+static struct irqaction iop_timer_irq = {
+ .name = "IOP Timer Tick",
+ .handler = iop_timer_interrupt,
.flags = IRQF_DISABLED | IRQF_TIMER,
};
-void __init iop3xx_init_time(unsigned long tick_rate)
+void __init iop_init_time(unsigned long tick_rate)
{
u32 timer_ctl;
@@ -78,17 +86,17 @@
ticks_per_usec = tick_rate / 1000000;
next_jiffy_time = 0xffffffff;
- timer_ctl = IOP3XX_TMR_EN | IOP3XX_TMR_PRIVILEGED |
- IOP3XX_TMR_RELOAD | IOP3XX_TMR_RATIO_1_1;
+ timer_ctl = IOP_TMR_EN | IOP_TMR_PRIVILEGED |
+ IOP_TMR_RELOAD | IOP_TMR_RATIO_1_1;
/*
* We use timer 0 for our timer interrupt, and timer 1 as
* monotonic counter for tracking missed jiffies.
*/
- asm volatile("mcr p6, 0, %0, c4, c1, 0" : : "r" (ticks_per_jiffy - 1));
- asm volatile("mcr p6, 0, %0, c0, c1, 0" : : "r" (timer_ctl));
- asm volatile("mcr p6, 0, %0, c5, c1, 0" : : "r" (0xffffffff));
- asm volatile("mcr p6, 0, %0, c1, c1, 0" : : "r" (timer_ctl));
+ write_trr0(ticks_per_jiffy - 1);
+ write_tmr0(timer_ctl);
+ write_trr1(0xffffffff);
+ write_tmr1(timer_ctl);
- setup_irq(IRQ_IOP3XX_TIMER0, &iop3xx_timer_irq);
+ setup_irq(IRQ_IOP_TIMER0, &iop_timer_irq);
}