drivers/common/module_entry.c

/******************************************************************************
 * Copyright (c) 2004, 2011 IBM Corporation
 * All rights reserved.
 * This program and the accompanying materials
 * are made available under the terms of the BSD License
 * which accompanies this distribution, and is available at
 * http://www.opensource.org/licenses/bsd-license.php
 *
 * Contributors:
 *     IBM Corporation - initial implementation
 *****************************************************************************/

#include "netdriver_int.h"

extern snk_module_t snk_module_interface;

snk_kernel_t *snk_kernel_interface = 0;

extern int
check_driver( pci_config_t *pci_conf );


static void*
memset( void *dest, int c, size_t n )
{
	while( n-- ) {
		*( char * ) dest++ = ( char ) c;
	}
	return dest;
}


extern char __module_start[];
extern char __module_end[];
extern char __bss_start[];
extern char __bss_end[];

snk_module_t*
module_init(snk_kernel_t *snk_kernel_int, pci_config_t *pciconf)
{
	long module_size;

	module_size = __module_end - __module_start;
	if (module_size >= 0x800000) {
		snk_kernel_int->print("Module size (%llu bytes) is too big!\n",
				      module_size);
		return 0;
	}

	memset(__bss_start, 0, __bss_end - __bss_start);

	if (snk_kernel_int->version != snk_module_interface.version) {
		return 0;
	}

	snk_kernel_interface = snk_kernel_int;

	/* Check if this is the right driver */
	if (check_driver(pciconf) < 0) {
		return 0;
	}

	snk_module_interface.link_addr = module_init;
	return &snk_module_interface;
}