[mirror_ubuntu-zesty-kernel.git] / arch / sparc / prom / bootstr_32.c

/*
 * bootstr.c:  Boot string/argument acquisition from the PROM.
 *
 * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#include <linux/string.h>
#include <asm/oplib.h>
#include <linux/init.h>

#define BARG_LEN  256
static char barg_buf[BARG_LEN] = { 0 };
static char fetched __initdata = 0;

char * __init
prom_getbootargs(void)
{
	int iter;
	char *cp, *arg;

	/* This check saves us from a panic when bootfd patches args. */
	if (fetched) {
		return barg_buf;
	}

	switch(prom_vers) {
	case PROM_V0:
		cp = barg_buf;
		/* Start from 1 and go over fd(0,0,0)kernel */
		for(iter = 1; iter < 8; iter++) {
			arg = (*(romvec->pv_v0bootargs))->argv[iter];
			if (arg == NULL)
				break;
			while(*arg != 0) {
				/* Leave place for space and null. */
				if(cp >= barg_buf + BARG_LEN-2){
					/* We might issue a warning here. */
					break;
				}
				*cp++ = *arg++;
			}
			*cp++ = ' ';
		}
		*cp = 0;
		break;
	case PROM_V2:
	case PROM_V3:
		/*
		 * V3 PROM cannot supply as with more than 128 bytes
		 * of an argument. But a smart bootstrap loader can.
		 */
		strlcpy(barg_buf, *romvec->pv_v2bootargs.bootargs, sizeof(barg_buf));
		break;
	default:
		break;
	}

	fetched = 1;
	return barg_buf;
}
Commit	Line	Data
88278ca2	1	/*
1da177e4 LT	2	* bootstr.c: Boot string/argument acquisition from the PROM.
	3	*
	4	* Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
	5	*/
	6
	7	#include <linux/string.h>
	8	#include <asm/oplib.h>
1da177e4 LT	9	#include <linux/init.h>
	10
	11	#define BARG_LEN 256
	12	static char barg_buf[BARG_LEN] = { 0 };
	13	static char fetched __initdata = 0;
	14
1da177e4 LT	15	char * __init
	16	prom_getbootargs(void)
	17	{
	18	int iter;
	19	char cp, arg;
	20
	21	/* This check saves us from a panic when bootfd patches args. */
	22	if (fetched) {
	23	return barg_buf;
	24	}
	25
	26	switch(prom_vers) {
	27	case PROM_V0:
1da177e4 LT	28	cp = barg_buf;
	29	/* Start from 1 and go over fd(0,0,0)kernel */
	30	for(iter = 1; iter < 8; iter++) {
	31	arg = (*(romvec->pv_v0bootargs))->argv[iter];
5f66dd35 SR	32	if (arg == NULL)
5f66dd35 SR	33	break;
1da177e4 LT	34	while(*arg != 0) {
	35	/* Leave place for space and null. */
	36	if(cp >= barg_buf + BARG_LEN-2){
	37	/* We might issue a warning here. */
	38	break;
	39	}
	40	cp++ = arg++;
	41	}
	42	*cp++ = ' ';
	43	}
	44	*cp = 0;
	45	break;
	46	case PROM_V2:
	47	case PROM_V3:
	48	/*
	49	* V3 PROM cannot supply as with more than 128 bytes
	50	* of an argument. But a smart bootstrap loader can.
	51	*/
	52	strlcpy(barg_buf, *romvec->pv_v2bootargs.bootargs, sizeof(barg_buf));
	53	break;
	54	default:
	55	break;
	56	}
	57
	58	fetched = 1;
	59	return barg_buf;
	60	}