diff options
| author | venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> | 2008-09-05 18:02:17 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-16 16:53:07 +0200 |
| commit | 58ac1e76ce77d515bd5cb65dbc465a040da341c6 (patch) | |
| tree | e1bd9e60aaaa5098ea368c04043adf2a79fca604 /arch/x86/kernel/hpet.c | |
| parent | b40d575bf0679c45aaf9e1161fc51a6b041b7210 (diff) | |
x86: HPET_MSI Basic HPET_MSI setup code
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>
Diffstat (limited to 'arch/x86/kernel/hpet.c')
| -rw-r--r-- | arch/x86/kernel/hpet.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index f7cb5e9e261..3f10d16a834 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -6,6 +6,8 @@ #include <linux/init.h> #include <linux/sysdev.h> #include <linux/pm.h> +#include <linux/interrupt.h> +#include <linux/cpu.h> #include <asm/fixmap.h> #include <asm/hpet.h> @@ -25,6 +27,15 @@ unsigned long hpet_address; static void __iomem *hpet_virt_address; +struct hpet_dev { + struct clock_event_device evt; + unsigned int num; + int cpu; + unsigned int irq; + unsigned int flags; + char name[10]; +}; + unsigned long hpet_readl(unsigned long a) { return readl(hpet_virt_address + a); @@ -305,6 +316,49 @@ static int hpet_legacy_next_event(unsigned long delta, } /* + * HPET MSI Support + */ + +void hpet_msi_unmask(unsigned int irq) +{ + struct hpet_dev *hdev = get_irq_data(irq); + unsigned long cfg; + + /* unmask it */ + cfg = hpet_readl(HPET_Tn_CFG(hdev->num)); + cfg |= HPET_TN_FSB; + hpet_writel(cfg, HPET_Tn_CFG(hdev->num)); +} + +void hpet_msi_mask(unsigned int irq) +{ + unsigned long cfg; + struct hpet_dev *hdev = get_irq_data(irq); + + /* mask it */ + cfg = hpet_readl(HPET_Tn_CFG(hdev->num)); + cfg &= ~HPET_TN_FSB; + hpet_writel(cfg, HPET_Tn_CFG(hdev->num)); +} + +void hpet_msi_write(unsigned int irq, struct msi_msg *msg) +{ + struct hpet_dev *hdev = get_irq_data(irq); + + hpet_writel(msg->data, HPET_Tn_ROUTE(hdev->num)); + hpet_writel(msg->address_lo, HPET_Tn_ROUTE(hdev->num) + 4); +} + +void hpet_msi_read(unsigned int irq, struct msi_msg *msg) +{ + struct hpet_dev *hdev = get_irq_data(irq); + + msg->data = hpet_readl(HPET_Tn_ROUTE(hdev->num)); + msg->address_lo = hpet_readl(HPET_Tn_ROUTE(hdev->num) + 4); + msg->address_hi = 0; +} + +/* * Clock source related code */ static cycle_t read_hpet(void) |