[deliverable/linux.git] / arch / ia64 / kernel / acpi-ext.c

/*
 * 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 byte_length;

	if (resource->type != ACPI_RESOURCE_TYPE_VENDOR)
		return AE_OK;

	vendor = (struct acpi_resource_vendor *)&resource->data;
	descriptor = (struct acpi_vendor_descriptor *)vendor->byte_data;
	if (vendor->byte_length <= sizeof(*info->descriptor) ||
	    descriptor->guid_id != info->descriptor->guid_id ||
	    efi_guidcmp(descriptor->guid, info->descriptor->guid))
		return AE_OK;

	byte_length = vendor->byte_length - sizeof(struct acpi_vendor_descriptor);
	info->data = acpi_os_allocate(byte_length);
	if (!info->data)
		return AE_NO_MEMORY;

	memcpy(info->data,
	       vendor->byte_data + sizeof(struct acpi_vendor_descriptor),
	       byte_length);
	info->length = byte_length;
	return AE_CTRL_TERMINATE;
}

acpi_status
acpi_find_vendor_resource(acpi_handle obj, struct acpi_vendor_descriptor * id,
			  u8 ** data, u32 * byte_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;
	*byte_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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/ia64/kernel/acpi-ext.c
	3	*
	4	* Copyright (C) 2003 Hewlett-Packard
	5	* Copyright (C) Alex Williamson
	6	* Copyright (C) Bjorn Helgaas
	7	*
	8	* Vendor specific extensions to ACPI.
	9	*/
	10
	11	#include <linux/config.h>
	12	#include <linux/module.h>
	13	#include <linux/types.h>
	14	#include <linux/acpi.h>
	15	#include <linux/efi.h>
	16
	17	#include <asm/acpi-ext.h>
	18
	19	struct acpi_vendor_descriptor {
4be44fcd LB	20	u8 guid_id;
4be44fcd LB	21	efi_guid_t guid;
1da177e4 LT	22	};
	23
	24	struct acpi_vendor_info {
4be44fcd LB	25	struct acpi_vendor_descriptor *descriptor;
	26	u8 *data;
	27	u32 length;
1da177e4 LT	28	};
	29
	30	acpi_status
	31	acpi_vendor_resource_match(struct acpi_resource resource, void context)
	32	{
4be44fcd	33	struct acpi_vendor_info info = (struct acpi_vendor_info )context;
1da177e4 LT	34	struct acpi_resource_vendor *vendor;
1da177e4 LT	35	struct acpi_vendor_descriptor *descriptor;
50eca3eb	36	u32 byte_length;
1da177e4	37
50eca3eb	38	if (resource->type != ACPI_RESOURCE_TYPE_VENDOR)
1da177e4 LT	39	return AE_OK;
1da177e4 LT	40
4be44fcd	41	vendor = (struct acpi_resource_vendor *)&resource->data;
50eca3eb BM	42	descriptor = (struct acpi_vendor_descriptor *)vendor->byte_data;
50eca3eb BM	43	if (vendor->byte_length <= sizeof(*info->descriptor) \|\|
1da177e4 LT	44	descriptor->guid_id != info->descriptor->guid_id \|\|
	45	efi_guidcmp(descriptor->guid, info->descriptor->guid))
	46	return AE_OK;
	47
50eca3eb BM	48	byte_length = vendor->byte_length - sizeof(struct acpi_vendor_descriptor);
50eca3eb BM	49	info->data = acpi_os_allocate(byte_length);
1da177e4 LT	50	if (!info->data)
	51	return AE_NO_MEMORY;
	52
4be44fcd	53	memcpy(info->data,
50eca3eb BM	54	vendor->byte_data + sizeof(struct acpi_vendor_descriptor),
	55	byte_length);
	56	info->length = byte_length;
1da177e4 LT	57	return AE_CTRL_TERMINATE;
	58	}
	59
	60	acpi_status
4be44fcd	61	acpi_find_vendor_resource(acpi_handle obj, struct acpi_vendor_descriptor * id,
50eca3eb	62	u8 ** data, u32 * byte_length)
1da177e4 LT	63	{
	64	struct acpi_vendor_info info;
	65
	66	info.descriptor = id;
	67	info.data = NULL;
	68
4be44fcd LB	69	acpi_walk_resources(obj, METHOD_NAME__CRS, acpi_vendor_resource_match,
4be44fcd LB	70	&info);
1da177e4 LT	71	if (!info.data)
	72	return AE_NOT_FOUND;
	73
	74	*data = info.data;
50eca3eb	75	*byte_length = info.length;
1da177e4 LT	76	return AE_OK;
	77	}
	78
	79	struct acpi_vendor_descriptor hp_ccsr_descriptor = {
	80	.guid_id = 2,
4be44fcd LB	81	.guid =
	82	EFI_GUID(0x69e9adf9, 0x924f, 0xab5f, 0xf6, 0x4a, 0x24, 0xd2, 0x01,
	83	0x37, 0x0e, 0xad)
1da177e4 LT	84	};
1da177e4 LT	85
4be44fcd	86	acpi_status hp_acpi_csr_space(acpi_handle obj, u64 * csr_base, u64 * csr_length)
1da177e4 LT	87	{
	88	acpi_status status;
	89	u8 *data;
	90	u32 length;
	91
4be44fcd LB	92	status =
4be44fcd LB	93	acpi_find_vendor_resource(obj, &hp_ccsr_descriptor, &data, &length);
1da177e4 LT	94
	95	if (ACPI_FAILURE(status) \|\| length != 16)
	96	return AE_NOT_FOUND;
	97
	98	memcpy(csr_base, data, sizeof(*csr_base));
	99	memcpy(csr_length, data + 8, sizeof(*csr_length));
	100	acpi_os_free(data);
	101
	102	return AE_OK;
	103	}
	104
	105	EXPORT_SYMBOL(hp_acpi_csr_space);