libefi.c

/*-
 * Copyright (c) 2000 Doug Rabson
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <efi.h>
#include <eficonsctl.h>
#include <efilib.h>
#include <stand.h>

EFI_HANDLE		IH;
EFI_SYSTEM_TABLE	*ST;
EFI_BOOT_SERVICES	*BS;
EFI_RUNTIME_SERVICES	*RS;

void *
efi_get_table(EFI_GUID *tbl)
{
	EFI_GUID *id;
	int i;

	for (i = 0; i < ST->NumberOfTableEntries; i++) {
		id = &ST->ConfigurationTable[i].VendorGuid;
		if (!memcmp(id, tbl, sizeof(EFI_GUID)))
			return (ST->ConfigurationTable[i].VendorTable);
	}
	return (NULL);
}

EFI_STATUS
OpenProtocolByHandle(EFI_HANDLE handle, EFI_GUID *protocol, void **interface)
{
	return (BS->OpenProtocol(handle, protocol, interface, IH, NULL,
	    EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL));
}