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x86, hpet: Simplify the HPET code

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On 64-bits, using unsigned long when unsigned int suffices
needlessly creates larger code (due to the need for REX
prefixes), and most of the logic in hpet.c really doesn't need
64-bit operations.

At once this avoids the need for a couple of type casts.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Shaohua Li <shaohua.li@intel.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <4A8BC9780200007800010832@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich 2009-08-19 08:44:24 +01:00 committed by Ingo Molnar
parent 39fe05e58c
commit 5946fa3d5c
2 changed files with 24 additions and 23 deletions
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2
arch/x86/include/asm/hpet.h
View File

@ -69,7 +69,7 @@ extern int hpet_force_user;
extern int is_hpet_enabled(void);
extern int hpet_enable(void);
extern void hpet_disable(void);
extern unsigned long hpet_readl(unsigned long a);
extern unsigned int hpet_readl(unsigned int a);
extern void force_hpet_resume(void);
extern void hpet_msi_unmask(unsigned int irq);

45
arch/x86/kernel/hpet.c
View File

@ -47,12 +47,12 @@ struct hpet_dev {
char name[10];
};
unsigned long hpet_readl(unsigned long a)
inline unsigned int hpet_readl(unsigned int a)
{
return readl(hpet_virt_address + a);
}
static inline void hpet_writel(unsigned long d, unsigned long a)
static inline void hpet_writel(unsigned int d, unsigned int a)
{
writel(d, hpet_virt_address + a);
}
@ -167,7 +167,7 @@ do { \
static void hpet_reserve_msi_timers(struct hpet_data *hd);
static void hpet_reserve_platform_timers(unsigned long id)
static void hpet_reserve_platform_timers(unsigned int id)
{
struct hpet __iomem *hpet = hpet_virt_address;
struct hpet_timer __iomem *timer = &hpet->hpet_timers[2];
@ -205,7 +205,7 @@ static void hpet_reserve_platform_timers(unsigned long id)
}
#else
static void hpet_reserve_platform_timers(unsigned long id) { }
static void hpet_reserve_platform_timers(unsigned int id) { }
#endif
/*
@ -246,7 +246,7 @@ static void hpet_reset_counter(void)
static void hpet_start_counter(void)
{
unsigned long cfg = hpet_readl(HPET_CFG);
unsigned int cfg = hpet_readl(HPET_CFG);
cfg |= HPET_CFG_ENABLE;
hpet_writel(cfg, HPET_CFG);
}
@ -271,7 +271,7 @@ static void hpet_resume_counter(void)
static void hpet_enable_legacy_int(void)
{
unsigned long cfg = hpet_readl(HPET_CFG);
unsigned int cfg = hpet_readl(HPET_CFG);
cfg |= HPET_CFG_LEGACY;
hpet_writel(cfg, HPET_CFG);
@ -314,7 +314,7 @@ static int hpet_setup_msi_irq(unsigned int irq);
static void hpet_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt, int timer)
{
unsigned long cfg, cmp, now;
unsigned int cfg, cmp, now;
uint64_t delta;
switch (mode) {
@ -323,7 +323,7 @@ static void hpet_set_mode(enum clock_event_mode mode,
delta = ((uint64_t)(NSEC_PER_SEC/HZ)) * evt->mult;
delta >>= evt->shift;
now = hpet_readl(HPET_COUNTER);
cmp = now + (unsigned long) delta;
cmp = now + (unsigned int) delta;
cfg = hpet_readl(HPET_Tn_CFG(timer));
/* Make sure we use edge triggered interrupts */
cfg &= ~HPET_TN_LEVEL;
@ -339,7 +339,7 @@ static void hpet_set_mode(enum clock_event_mode mode,
* (See AMD-8111 HyperTransport I/O Hub Data Sheet,
* Publication # 24674)
*/
hpet_writel((unsigned long) delta, HPET_Tn_CMP(timer));
hpet_writel((unsigned int) delta, HPET_Tn_CMP(timer));
hpet_start_counter();
hpet_print_config();
break;
@ -387,9 +387,9 @@ static int hpet_next_event(unsigned long delta,
* what we wrote hit the chip before we compare it to the
* counter.
*/
WARN_ON_ONCE((u32)hpet_readl(HPET_Tn_CMP(timer)) != cnt);
WARN_ON_ONCE(hpet_readl(HPET_Tn_CMP(timer)) != cnt);
return (s32)((u32)hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
return (s32)(hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
}
static void hpet_legacy_set_mode(enum clock_event_mode mode,
@ -415,7 +415,7 @@ static struct hpet_dev *hpet_devs;
void hpet_msi_unmask(unsigned int irq)
{
struct hpet_dev *hdev = get_irq_data(irq);
unsigned long cfg;
unsigned int cfg;
/* unmask it */
cfg = hpet_readl(HPET_Tn_CFG(hdev->num));
@ -425,7 +425,7 @@ void hpet_msi_unmask(unsigned int irq)
void hpet_msi_mask(unsigned int irq)
{
unsigned long cfg;
unsigned int cfg;
struct hpet_dev *hdev = get_irq_data(irq);
/* mask it */
@ -600,7 +600,7 @@ static void hpet_msi_capability_lookup(unsigned int start_timer)
for (i = start_timer; i < num_timers - RESERVE_TIMERS; i++) {
struct hpet_dev *hdev = &hpet_devs[num_timers_used];
unsigned long cfg = hpet_readl(HPET_Tn_CFG(i));
unsigned int cfg = hpet_readl(HPET_Tn_CFG(i));
/* Only consider HPET timer with MSI support */
if (!(cfg & HPET_TN_FSB_CAP))
@ -815,7 +815,7 @@ static int hpet_clocksource_register(void)
*/
int __init hpet_enable(void)
{
unsigned long id;
unsigned int id;
int i;
if (!is_hpet_capable())
@ -933,7 +933,7 @@ fs_initcall(hpet_late_init);
void hpet_disable(void)
{
if (is_hpet_capable()) {
unsigned long cfg = hpet_readl(HPET_CFG);
unsigned int cfg = hpet_readl(HPET_CFG);
if (hpet_legacy_int_enabled) {
cfg &= ~HPET_CFG_LEGACY;
@ -973,8 +973,8 @@ static int hpet_prev_update_sec;
static struct rtc_time hpet_alarm_time;
static unsigned long hpet_pie_count;
static u32 hpet_t1_cmp;
static unsigned long hpet_default_delta;
static unsigned long hpet_pie_delta;
static u32 hpet_default_delta;
static u32 hpet_pie_delta;
static unsigned long hpet_pie_limit;
static rtc_irq_handler irq_handler;
@ -1025,7 +1025,8 @@ EXPORT_SYMBOL_GPL(hpet_unregister_irq_handler);
*/
int hpet_rtc_timer_init(void)
{
unsigned long cfg, cnt, delta, flags;
unsigned int cfg, cnt, delta;
unsigned long flags;
if (!is_hpet_enabled())
return 0;
@ -1035,7 +1036,7 @@ int hpet_rtc_timer_init(void)
clc = (uint64_t) hpet_clockevent.mult * NSEC_PER_SEC;
clc >>= hpet_clockevent.shift + DEFAULT_RTC_SHIFT;
hpet_default_delta = (unsigned long) clc;
hpet_default_delta = clc;
}
if (!(hpet_rtc_flags & RTC_PIE) || hpet_pie_limit)
@ -1121,7 +1122,7 @@ int hpet_set_periodic_freq(unsigned long freq)
clc = (uint64_t) hpet_clockevent.mult * NSEC_PER_SEC;
do_div(clc, freq);
clc >>= hpet_clockevent.shift;
hpet_pie_delta = (unsigned long) clc;
hpet_pie_delta = clc;
}
return 1;
}
@ -1135,7 +1136,7 @@ EXPORT_SYMBOL_GPL(hpet_rtc_dropped_irq);
static void hpet_rtc_timer_reinit(void)
{
unsigned long cfg, delta;
unsigned int cfg, delta;
int lost_ints = -1;
if (unlikely(!hpet_rtc_flags)) {