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authorIsaku Yamahata <yamahata@valinux.co.jp>2008-10-16 22:18:05 -0400
committerTony Luck <tony.luck@intel.com>2008-10-17 13:06:21 -0400
commitbcdd48739d1336332e4086c9e1c9f225290b8194 (patch)
tree6305de8af340d352b740406268d245be5cfaf329 /arch/ia64/xen
parent16583bc0b4871299a60cbcdd1c6e102e3f9b8e4b (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/ia64/xen')
-rw-r--r--arch/ia64/xen/xen_pv_ops.c52
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 5b23cd5e9153..41a6cbfab150 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 = {
292}; 292};
293 293
294/*************************************************************************** 294/***************************************************************************
295 * pv_iosapic_ops
296 * iosapic read/write hooks.
297 */
298static void
299xen_pcat_compat_init(void)
300{
301 /* nothing */
302}
303
304static struct irq_chip*
305xen_iosapic_get_irq_chip(unsigned long trigger)
306{
307 return NULL;
308}
309
310static unsigned int
311xen_iosapic_read(char __iomem *iosapic, unsigned int reg)
312{
313 struct physdev_apic apic_op;
314 int ret;
315
316 apic_op.apic_physbase = (unsigned long)iosapic -
317 __IA64_UNCACHED_OFFSET;
318 apic_op.reg = reg;
319 ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
320 if (ret)
321 return ret;
322 return apic_op.value;
323}
324
325static void
326xen_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
327{
328 struct physdev_apic apic_op;
329
330 apic_op.apic_physbase = (unsigned long)iosapic -
331 __IA64_UNCACHED_OFFSET;
332 apic_op.reg = reg;
333 apic_op.value = val;
334 HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op);
335}
336
337static const struct pv_iosapic_ops xen_iosapic_ops __initdata = {
338 .pcat_compat_init = xen_pcat_compat_init,
339 .__get_irq_chip = xen_iosapic_get_irq_chip,
340
341 .__read = xen_iosapic_read,
342 .__write = xen_iosapic_write,
343};
344
345/***************************************************************************
295 * pv_ops initialization 346 * pv_ops initialization
296 */ 347 */
297 348
@@ -302,6 +353,7 @@ xen_setup_pv_ops(void)
302 pv_info = xen_info; 353 pv_info = xen_info;
303 pv_init_ops = xen_init_ops; 354 pv_init_ops = xen_init_ops;
304 pv_cpu_ops = xen_cpu_ops; 355 pv_cpu_ops = xen_cpu_ops;
356 pv_iosapic_ops = xen_iosapic_ops;
305 357
306 paravirt_cpu_asm_init(&xen_cpu_asm_switch); 358 paravirt_cpu_asm_init(&xen_cpu_asm_switch);
307} 359}