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authorThomas Gleixner <tglx@linutronix.de>2007-10-13 01:04:06 +0400
committerThomas Gleixner <tglx@inhelltoy.tec.linutronix.de>2007-10-13 01:04:06 +0400
commit06a24dec10bc4014fc0974670627efed68f5da27 (patch)
tree9cd0e96fca88a7875d15af6b506b723f0d3e9d00 /arch/x86
parentd371698efd45c3664fd1726780c360f02e1f9580 (diff)
downloadlinux-06a24dec10bc4014fc0974670627efed68f5da27.tar.xz
i386: prepare sharing the hpet code with x86_64
The hpet implementations of i386 and x8664 has been mostly the same before the clock events conversion of i386. The clock events conversion of i386 hpet is already done. So it makes sense to share the code for the x86_64 clock events conversion. Abstract out the mapping functions. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/hpet_32.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/arch/x86/kernel/hpet_32.c b/arch/x86/kernel/hpet_32.c
index 533d4932bc79..748abf0286d2 100644
--- a/arch/x86/kernel/hpet_32.c
+++ b/arch/x86/kernel/hpet_32.c
@@ -8,10 +8,9 @@
#include <linux/delay.h>
#include <asm/hpet.h>
+#include <asm/i8253.h>
#include <asm/io.h>
-extern struct clock_event_device *global_clock_event;
-
#define HPET_MASK CLOCKSOURCE_MASK(32)
#define HPET_SHIFT 22
@@ -22,7 +21,7 @@ extern struct clock_event_device *global_clock_event;
* HPET address is set in acpi/boot.c, when an ACPI entry exists
*/
unsigned long hpet_address;
-static void __iomem * hpet_virt_address;
+static void __iomem *hpet_virt_address;
static inline unsigned long hpet_readl(unsigned long a)
{
@@ -34,6 +33,17 @@ static inline void hpet_writel(unsigned long d, unsigned long a)
writel(d, hpet_virt_address + a);
}
+static inline void hpet_set_mapping(void)
+{
+ hpet_virt_address = ioremap_nocache(hpet_address, HPET_MMAP_SIZE);
+}
+
+static inline void hpet_clear_mapping(void)
+{
+ iounmap(hpet_virt_address);
+ hpet_virt_address = NULL;
+}
+
/*
* HPET command line enable / disable
*/
@@ -83,7 +93,7 @@ static void hpet_reserve_platform_timers(unsigned long id)
memset(&hd, 0, sizeof (hd));
hd.hd_phys_address = hpet_address;
- hd.hd_address = hpet_virt_address;
+ hd.hd_address = hpet;
hd.hd_nirqs = nrtimers;
hd.hd_flags = HPET_DATA_PLATFORM;
hpet_reserve_timer(&hd, 0);
@@ -238,7 +248,7 @@ int __init hpet_enable(void)
if (!is_hpet_capable())
return 0;
- hpet_virt_address = ioremap_nocache(hpet_address, HPET_MMAP_SIZE);
+ hpet_set_mapping();
/*
* Read the period and check for a sane value:
@@ -334,13 +344,11 @@ int __init hpet_enable(void)
return 0;
out_nohpet:
- iounmap(hpet_virt_address);
- hpet_virt_address = NULL;
+ hpet_clear_mapping();
boot_hpet_disable = 1;
return 0;
}
-
#ifdef CONFIG_HPET_EMULATE_RTC
/* HPET in LegacyReplacement Mode eats up RTC interrupt line. When, HPET