1 files changed, 100 insertions, 0 deletions
diff --git a/arch/ia64/kernel/acpi-ext.c b/arch/ia64/kernel/acpi-ext.c
new file mode 100644
index 0000000..2623df5
--- /dev/null
+++ b/arch/ia64/kernel/acpi-ext.c
@@ -0,0 +1,100 @@
+/*
+ * arch/ia64/kernel/acpi-ext.c
+ *
+ * Copyright (C) 2003 Hewlett-Packard
+ * Copyright (C) Alex Williamson
+ * Copyright (C) Bjorn Helgaas
+ *
+ * Vendor specific extensions to ACPI.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/acpi.h>
+#include <linux/efi.h>
+
+#include <asm/acpi-ext.h>
+
+struct acpi_vendor_descriptor {
+	u8				guid_id;
+	efi_guid_t			guid;
+};
+
+struct acpi_vendor_info {
+	struct acpi_vendor_descriptor	*descriptor;
+	u8				*data;
+	u32				length;
+};
+
+acpi_status
+acpi_vendor_resource_match(struct acpi_resource *resource, void *context)
+{
+	struct acpi_vendor_info *info = (struct acpi_vendor_info *) context;
+	struct acpi_resource_vendor *vendor;
+	struct acpi_vendor_descriptor *descriptor;
+	u32 length;
+
+	if (resource->id != ACPI_RSTYPE_VENDOR)
+		return AE_OK;
+
+	vendor = (struct acpi_resource_vendor *) &resource->data;
+	descriptor = (struct acpi_vendor_descriptor *) vendor->reserved;
+	if (vendor->length <= sizeof(*info->descriptor) ||
+	    descriptor->guid_id != info->descriptor->guid_id ||
+	    efi_guidcmp(descriptor->guid, info->descriptor->guid))
+		return AE_OK;
+
+	length = vendor->length - sizeof(struct acpi_vendor_descriptor);
+	info->data = acpi_os_allocate(length);
+	if (!info->data)
+		return AE_NO_MEMORY;
+
+	memcpy(info->data, vendor->reserved + sizeof(struct acpi_vendor_descriptor), length);
+	info->length = length;
+	return AE_CTRL_TERMINATE;
+}
+
+acpi_status
+acpi_find_vendor_resource(acpi_handle obj, struct acpi_vendor_descriptor *id,
+		u8 **data, u32 *length)
+{
+	struct acpi_vendor_info info;
+
+	info.descriptor = id;
+	info.data = NULL;
+
+	acpi_walk_resources(obj, METHOD_NAME__CRS, acpi_vendor_resource_match, &info);
+	if (!info.data)
+		return AE_NOT_FOUND;
+
+	*data = info.data;
+	*length = info.length;
+	return AE_OK;
+}
+
+struct acpi_vendor_descriptor hp_ccsr_descriptor = {
+	.guid_id = 2,
+	.guid    = EFI_GUID(0x69e9adf9, 0x924f, 0xab5f, 0xf6, 0x4a, 0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad)
+};
+
+acpi_status
+hp_acpi_csr_space(acpi_handle obj, u64 *csr_base, u64 *csr_length)
+{
+	acpi_status status;
+	u8 *data;
+	u32 length;
+
+	status = acpi_find_vendor_resource(obj, &hp_ccsr_descriptor, &data, &length);
+
+	if (ACPI_FAILURE(status) || length != 16)
+		return AE_NOT_FOUND;
+
+	memcpy(csr_base, data, sizeof(*csr_base));
+	memcpy(csr_length, data + 8, sizeof(*csr_length));
+	acpi_os_free(data);
+
+	return AE_OK;
+}
+
+EXPORT_SYMBOL(hp_acpi_csr_space);