/* *  Copyright (C) 2001-2003 Hewlett-Packard Co. *	Contributed by Stephane Eranian <eranian@hpl.hp.com> * * This file is part of the ELILO, the EFI Linux boot loader. * *  ELILO is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2, or (at your option) *  any later version. * *  ELILO is distributed in the hope that it will be useful, *  but WITHOUT ANY WARRANTY; without even the implied warranty of *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *  GNU General Public License for more details. * *  You should have received a copy of the GNU General Public License *  along with ELILO; see the file COPYING.  If not, write to the Free *  Software Foundation, 59 Temple Place - Suite 330, Boston, MA *  02111-1307, USA. * * Please check out the elilo.txt for complete documentation on how * to use this program. */#include <efi.h>#include <efilib.h>#include "elilo.h"/* * Initialize the generic part of the boot parameters and call the architecture specific * subroutine. * Output: * 	cookie: the memory map cookie to use with ExitBootServices() * Return: * 	NULL: if an error occured * 	bp  : the address of the bootparams otherwise (opaque type) */VOID *create_boot_params(CHAR16 *args, memdesc_t *initrd, UINTN *cookie){/*  * XXX: need cleanup * See ia32 code for explanation on why it is so big. */#define	BOOT_PARAM_MEMSIZE	16384 		UINTN bpsize, cmdline_size;	boot_params_t *bp;	CHAR8 *cp;	CHAR16 ch;	/*	 * Allocate runtime services memory to hold memory descriptor table and	 * command line arguments and fetch memory map:	 *	 * arg_size = number of character in ASCII form	 */	cmdline_size = StrLen(args) + 1;	bpsize       = sizeof(boot_params_t) + cmdline_size;	if (bpsize > BOOT_PARAM_MEMSIZE) {		ERR_PRT((L"BOOT_PARAM_MEMSIZE too small, need at least %d bytes", bpsize));		return NULL;	}	/*	 * Allocate memory for boot parameters.	 * This CANNOT be EfiLoaderData or EfiLoaderCode as the kernel	 * frees this region when initializing.	 */	bp = (boot_params_t *)alloc(BOOT_PARAM_MEMSIZE, EfiLoaderData);	if (bp == NULL) {		ERR_PRT((L"can't allocate boot params"));		return 0;	}	VERB_PRT(3, Print(L"boot params @ 0x%lx\n", bp));/* XXX: need to fix this for 3.5 */#ifdef CONFIG_ia64       cp = ((CHAR8 *)bp) + BOOT_PARAM_MEMSIZE - cmdline_size;#elif defined CONFIG_ia32       cp = ((CHAR8 *)bp) + BOOT_PARAM_MEMSIZE - 2048;#endif	/* 	 * clear entire buffer. The boot param structure is bigger than	 * needs be but this allows the kernel bootparam structure to grow	 * (up to BOOT_PARAM_MEMSIZE) without having to worry about fixing the bootloader.	 * By convention between the laoder and the kernel, the value 0 means 	 * don't care or not set.	 */	Memset(bp, 0, BOOT_PARAM_MEMSIZE);	if (sysdeps_create_boot_params(bp, cp, initrd, cookie) == -1) return 0;	/*	 * Convert kernel command line args from UNICODE to ASCII and put them where	 * the kernel expects them:	 */	while (1) {		ch = *args++;		if (!ch) break;		*cp++ = ch;	}	*cp++ = '\0';	return bp;}VOIDfree_boot_params(VOID *bp){	boot_params_t *real_bp = (boot_params_t *)bp;	sysdeps_free_boot_params(real_bp);	free(real_bp);}