This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / i386 / kernel / acpi / processor.c

diff --git a/arch/i386/kernel/acpi/processor.c b/arch/i386/kernel/acpi/processor.c
new file mode 100644 (file)
index 0000000..9f4cc02
--- /dev/null
+++ b/arch/i386/kernel/acpi/processor.c
@@ -0,0 +1,75 @@
+/*
+ * arch/i386/kernel/acpi/processor.c
+ *
+ * Copyright (C) 2005 Intel Corporation
+ *     Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
+ *     - Added _PDC for platforms with Intel CPUs
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+
+#include <acpi/processor.h>
+#include <asm/acpi.h>
+
+static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c)
+{
+       struct acpi_object_list *obj_list;
+       union acpi_object *obj;
+       u32 *buf;
+
+       /* allocate and initialize pdc. It will be used later. */
+       obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);
+       if (!obj_list) {
+               printk(KERN_ERR "Memory allocation error\n");
+               return;
+       }
+
+       obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
+       if (!obj) {
+               printk(KERN_ERR "Memory allocation error\n");
+               kfree(obj_list);
+               return;
+       }
+
+       buf = kmalloc(12, GFP_KERNEL);
+       if (!buf) {
+               printk(KERN_ERR "Memory allocation error\n");
+               kfree(obj);
+               kfree(obj_list);
+               return;
+       }
+
+       buf[0] = ACPI_PDC_REVISION_ID;
+       buf[1] = 1;
+       buf[2] = ACPI_PDC_C_CAPABILITY_SMP;
+
+       if (cpu_has(c, X86_FEATURE_EST))
+               buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP;
+
+       obj->type = ACPI_TYPE_BUFFER;
+       obj->buffer.length = 12;
+       obj->buffer.pointer = (u8 *) buf;
+       obj_list->count = 1;
+       obj_list->pointer = obj;
+       pr->pdc = obj_list;
+
+       return;
+}
+
+/* Initialize _PDC data based on the CPU vendor */
+void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
+{
+       unsigned int cpu = pr->id;
+       struct cpuinfo_x86 *c = cpu_data + cpu;
+
+       pr->pdc = NULL;
+       if (c->x86_vendor == X86_VENDOR_INTEL)
+               init_intel_pdc(pr, c);
+
+       return;
+}
+
+EXPORT_SYMBOL(arch_acpi_processor_init_pdc);