diff options
author | Isaku Yamahata <yamahata@valinux.co.jp> | 2008-10-17 11:18:05 +0900 |
---|---|---|
committer | Tony Luck <tony.luck@intel.com> | 2008-10-17 10:06:21 -0700 |
commit | bcdd48739d1336332e4086c9e1c9f225290b8194 (patch) | |
tree | 6305de8af340d352b740406268d245be5cfaf329 /arch | |
parent | 16583bc0b4871299a60cbcdd1c6e102e3f9b8e4b (diff) |
ia64/pv_ops/xen: implement xen pv_iosapic_ops.
implement xen pv_iosapic_ops for xen paravirtualized
iosapic.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/ia64/xen/xen_pv_ops.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/ia64/xen/xen_pv_ops.c b/arch/ia64/xen/xen_pv_ops.c index 5b23cd5e915..41a6cbfab15 100644 --- a/arch/ia64/xen/xen_pv_ops.c +++ b/arch/ia64/xen/xen_pv_ops.c @@ -292,6 +292,57 @@ const struct pv_cpu_asm_switch xen_cpu_asm_switch = { }; /*************************************************************************** + * pv_iosapic_ops + * iosapic read/write hooks. + */ +static void +xen_pcat_compat_init(void) +{ + /* nothing */ +} + +static struct irq_chip* +xen_iosapic_get_irq_chip(unsigned long trigger) +{ + return NULL; +} + +static unsigned int +xen_iosapic_read(char __iomem *iosapic, unsigned int reg) +{ + struct physdev_apic apic_op; + int ret; + + apic_op.apic_physbase = (unsigned long)iosapic - + __IA64_UNCACHED_OFFSET; + apic_op.reg = reg; + ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op); + if (ret) + return ret; + return apic_op.value; +} + +static void +xen_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val) +{ + struct physdev_apic apic_op; + + apic_op.apic_physbase = (unsigned long)iosapic - + __IA64_UNCACHED_OFFSET; + apic_op.reg = reg; + apic_op.value = val; + HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op); +} + +static const struct pv_iosapic_ops xen_iosapic_ops __initdata = { + .pcat_compat_init = xen_pcat_compat_init, + .__get_irq_chip = xen_iosapic_get_irq_chip, + + .__read = xen_iosapic_read, + .__write = xen_iosapic_write, +}; + +/*************************************************************************** * pv_ops initialization */ @@ -302,6 +353,7 @@ xen_setup_pv_ops(void) pv_info = xen_info; pv_init_ops = xen_init_ops; pv_cpu_ops = xen_cpu_ops; + pv_iosapic_ops = xen_iosapic_ops; paravirt_cpu_asm_init(&xen_cpu_asm_switch); } |