linux/arch/sparc64/prom/bootstr.c
<<
>>
Prefs
   1/*
   2 * bootstr.c:  Boot string/argument acquisition from the PROM.
   3 *
   4 * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
   5 * Copyright(C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6 */
   7
   8#include <linux/string.h>
   9#include <linux/init.h>
  10#include <asm/oplib.h>
  11
  12/* WARNING: The boot loader knows that these next three variables come one right
  13 *          after another in the .data section.  Do not move this stuff into
  14 *          the .bss section or it will break things.
  15 */
  16
  17#define BARG_LEN  256
  18struct {
  19        int bootstr_len;
  20        int bootstr_valid;
  21        char bootstr_buf[BARG_LEN];
  22} bootstr_info = {
  23        .bootstr_len = BARG_LEN,
  24#ifdef CONFIG_CMDLINE
  25        .bootstr_valid = 1,
  26        .bootstr_buf = CONFIG_CMDLINE,
  27#endif
  28};
  29
  30char * __init
  31prom_getbootargs(void)
  32{
  33        /* This check saves us from a panic when bootfd patches args. */
  34        if (bootstr_info.bootstr_valid)
  35                return bootstr_info.bootstr_buf;
  36        prom_getstring(prom_chosen_node, "bootargs",
  37                       bootstr_info.bootstr_buf, BARG_LEN);
  38        bootstr_info.bootstr_valid = 1;
  39        return bootstr_info.bootstr_buf;
  40}
  41
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.