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44 lines
1.2 KiB
44 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* bootstr.c: Boot string/argument acquisition from the PROM. |
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* |
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* Copyright(C) 1995 David S. Miller ([email protected]) |
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* Copyright(C) 1996,1998 Jakub Jelinek ([email protected]) |
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*/ |
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#include <linux/string.h> |
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#include <linux/init.h> |
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#include <asm/oplib.h> |
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/* WARNING: The boot loader knows that these next three variables come one right |
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* after another in the .data section. Do not move this stuff into |
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* the .bss section or it will break things. |
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*/ |
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/* We limit BARG_LEN to 1024 because this is the size of the |
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* 'barg_out' command line buffer in the SILO bootloader. |
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*/ |
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#define BARG_LEN 1024 |
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struct { |
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int bootstr_len; |
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int bootstr_valid; |
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char bootstr_buf[BARG_LEN]; |
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} bootstr_info = { |
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.bootstr_len = BARG_LEN, |
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#ifdef CONFIG_CMDLINE |
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.bootstr_valid = 1, |
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.bootstr_buf = CONFIG_CMDLINE, |
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#endif |
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}; |
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char * __init |
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prom_getbootargs(void) |
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{ |
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/* This check saves us from a panic when bootfd patches args. */ |
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if (bootstr_info.bootstr_valid) |
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return bootstr_info.bootstr_buf; |
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prom_getstring(prom_chosen_node, "bootargs", |
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bootstr_info.bootstr_buf, BARG_LEN); |
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bootstr_info.bootstr_valid = 1; |
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return bootstr_info.bootstr_buf; |
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}
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