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x86: HPET_MSI Basic HPET_MSI setup code

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Basic HPET MSI setup code. Routines to perform basic MSI read write
in HPET memory map and setting up irq_chip for HPET MSI.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
venkatesh.pallipadi@intel.com
2008-10-16 16:53:07 +02:00
committed by Ingo Molnar
parent b40d575bf0
commit 58ac1e76ce
3 changed files with 139 additions and 0 deletions
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include/asm-x86/hpet.h
+21
View File
@@ -1,6 +1,8 @@
#ifndef ASM_X86__HPET_H
#define ASM_X86__HPET_H
#include <linux/msi.h>
#ifdef CONFIG_HPET_TIMER
#define HPET_MMAP_SIZE 1024
@@ -10,6 +12,11 @@
#define HPET_CFG 0x010
#define HPET_STATUS 0x020
#define HPET_COUNTER 0x0f0
#define HPET_Tn_CFG(n) (0x100 + 0x20 * n)
#define HPET_Tn_CMP(n) (0x108 + 0x20 * n)
#define HPET_Tn_ROUTE(n) (0x110 + 0x20 * n)
#define HPET_T0_CFG 0x100
#define HPET_T0_CMP 0x108
#define HPET_T0_ROUTE 0x110
@@ -65,6 +72,20 @@ extern void hpet_disable(void);
extern unsigned long hpet_readl(unsigned long a);
extern void force_hpet_resume(void);
extern void hpet_msi_unmask(unsigned int irq);
extern void hpet_msi_mask(unsigned int irq);
extern void hpet_msi_write(unsigned int irq, struct msi_msg *msg);
extern void hpet_msi_read(unsigned int irq, struct msi_msg *msg);
#ifdef CONFIG_PCI_MSI
extern int arch_setup_hpet_msi(unsigned int irq);
#else
static inline int arch_setup_hpet_msi(unsigned int irq)
{
return -EINVAL;
}
#endif
#ifdef CONFIG_HPET_EMULATE_RTC
#include <linux/interrupt.h>