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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2009-04-24 00:10:36 +0900
committerRalf Baechle <ralf@linux-mips.org>2009-06-17 11:06:25 +0100
commita43da03ca4719276b9601730627d20b2a71fb6ba (patch)
tree54bdc04c1223839581feba0c00f44836c91ca9cc /arch/mips
parent605b7ef7b79cee8e36ae5c48700e1a1eec74d38a (diff)
downloadop-kernel-dev-a43da03ca4719276b9601730627d20b2a71fb6ba.zip
op-kernel-dev-a43da03ca4719276b9601730627d20b2a71fb6ba.tar.gz
MIPS: TXx9: micro optimization for clocksource and clock_event
Use container structure for clocksource, clock_event_device and hold a pointer to txx9_tmr_reg in it. This saves a few instructions in clocksource and clock_event handlers. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/kernel/cevt-txx9.c67
1 files changed, 43 insertions, 24 deletions
diff --git a/arch/mips/kernel/cevt-txx9.c b/arch/mips/kernel/cevt-txx9.c
index 2e911e3..0037f21 100644
--- a/arch/mips/kernel/cevt-txx9.c
+++ b/arch/mips/kernel/cevt-txx9.c
@@ -20,22 +20,29 @@
#define TIMER_CCD 0 /* 1/2 */
#define TIMER_CLK(imclk) ((imclk) / (2 << TIMER_CCD))
-static struct txx9_tmr_reg __iomem *txx9_cs_tmrptr;
+struct txx9_clocksource {
+ struct clocksource cs;
+ struct txx9_tmr_reg __iomem *tmrptr;
+};
static cycle_t txx9_cs_read(struct clocksource *cs)
{
- return __raw_readl(&txx9_cs_tmrptr->trr);
+ struct txx9_clocksource *txx9_cs =
+ container_of(cs, struct txx9_clocksource, cs);
+ return __raw_readl(&txx9_cs->tmrptr->trr);
}
/* Use 1 bit smaller width to use full bits in that width */
#define TXX9_CLOCKSOURCE_BITS (TXX9_TIMER_BITS - 1)
-static struct clocksource txx9_clocksource = {
- .name = "TXx9",
- .rating = 200,
- .read = txx9_cs_read,
- .mask = CLOCKSOURCE_MASK(TXX9_CLOCKSOURCE_BITS),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+static struct txx9_clocksource txx9_clocksource = {
+ .cs = {
+ .name = "TXx9",
+ .rating = 200,
+ .read = txx9_cs_read,
+ .mask = CLOCKSOURCE_MASK(TXX9_CLOCKSOURCE_BITS),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+ },
};
void __init txx9_clocksource_init(unsigned long baseaddr,
@@ -43,8 +50,8 @@ void __init txx9_clocksource_init(unsigned long baseaddr,
{
struct txx9_tmr_reg __iomem *tmrptr;
- clocksource_set_clock(&txx9_clocksource, TIMER_CLK(imbusclk));
- clocksource_register(&txx9_clocksource);
+ clocksource_set_clock(&txx9_clocksource.cs, TIMER_CLK(imbusclk));
+ clocksource_register(&txx9_clocksource.cs);
tmrptr = ioremap(baseaddr, sizeof(struct txx9_tmr_reg));
__raw_writel(TCR_BASE, &tmrptr->tcr);
@@ -53,10 +60,13 @@ void __init txx9_clocksource_init(unsigned long baseaddr,
__raw_writel(TXx9_TMITMR_TZCE, &tmrptr->itmr);
__raw_writel(1 << TXX9_CLOCKSOURCE_BITS, &tmrptr->cpra);
__raw_writel(TCR_BASE | TXx9_TMTCR_TCE, &tmrptr->tcr);
- txx9_cs_tmrptr = tmrptr;
+ txx9_clocksource.tmrptr = tmrptr;
}
-static struct txx9_tmr_reg __iomem *txx9_tmrptr;
+struct txx9_clock_event_device {
+ struct clock_event_device cd;
+ struct txx9_tmr_reg __iomem *tmrptr;
+};
static void txx9tmr_stop_and_clear(struct txx9_tmr_reg __iomem *tmrptr)
{
@@ -69,7 +79,9 @@ static void txx9tmr_stop_and_clear(struct txx9_tmr_reg __iomem *tmrptr)
static void txx9tmr_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
- struct txx9_tmr_reg __iomem *tmrptr = txx9_tmrptr;
+ struct txx9_clock_event_device *txx9_cd =
+ container_of(evt, struct txx9_clock_event_device, cd);
+ struct txx9_tmr_reg __iomem *tmrptr = txx9_cd->tmrptr;
txx9tmr_stop_and_clear(tmrptr);
switch (mode) {
@@ -99,7 +111,9 @@ static void txx9tmr_set_mode(enum clock_event_mode mode,
static int txx9tmr_set_next_event(unsigned long delta,
struct clock_event_device *evt)
{
- struct txx9_tmr_reg __iomem *tmrptr = txx9_tmrptr;
+ struct txx9_clock_event_device *txx9_cd =
+ container_of(evt, struct txx9_clock_event_device, cd);
+ struct txx9_tmr_reg __iomem *tmrptr = txx9_cd->tmrptr;
txx9tmr_stop_and_clear(tmrptr);
/* start timer */
@@ -108,18 +122,22 @@ static int txx9tmr_set_next_event(unsigned long delta,
return 0;
}
-static struct clock_event_device txx9tmr_clock_event_device = {
- .name = "TXx9",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .rating = 200,
- .set_mode = txx9tmr_set_mode,
- .set_next_event = txx9tmr_set_next_event,
+static struct txx9_clock_event_device txx9_clock_event_device = {
+ .cd = {
+ .name = "TXx9",
+ .features = CLOCK_EVT_FEAT_PERIODIC |
+ CLOCK_EVT_FEAT_ONESHOT,
+ .rating = 200,
+ .set_mode = txx9tmr_set_mode,
+ .set_next_event = txx9tmr_set_next_event,
+ },
};
static irqreturn_t txx9tmr_interrupt(int irq, void *dev_id)
{
- struct clock_event_device *cd = &txx9tmr_clock_event_device;
- struct txx9_tmr_reg __iomem *tmrptr = txx9_tmrptr;
+ struct txx9_clock_event_device *txx9_cd = dev_id;
+ struct clock_event_device *cd = &txx9_cd->cd;
+ struct txx9_tmr_reg __iomem *tmrptr = txx9_cd->tmrptr;
__raw_writel(0, &tmrptr->tisr); /* ack interrupt */
cd->event_handler(cd);
@@ -130,19 +148,20 @@ static struct irqaction txx9tmr_irq = {
.handler = txx9tmr_interrupt,
.flags = IRQF_DISABLED | IRQF_PERCPU,
.name = "txx9tmr",
+ .dev_id = &txx9_clock_event_device,
};
void __init txx9_clockevent_init(unsigned long baseaddr, int irq,
unsigned int imbusclk)
{
- struct clock_event_device *cd = &txx9tmr_clock_event_device;
+ struct clock_event_device *cd = &txx9_clock_event_device.cd;
struct txx9_tmr_reg __iomem *tmrptr;
tmrptr = ioremap(baseaddr, sizeof(struct txx9_tmr_reg));
txx9tmr_stop_and_clear(tmrptr);
__raw_writel(TIMER_CCD, &tmrptr->ccdr);
__raw_writel(0, &tmrptr->itmr);
- txx9_tmrptr = tmrptr;
+ txx9_clock_event_device.tmrptr = tmrptr;
clockevent_set_clock(cd, TIMER_CLK(imbusclk));
cd->max_delta_ns =
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