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Diffstat (limited to '')
| -rw-r--r-- | arch/sparc/prom/bootstr_64.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/sparc/prom/bootstr_64.c b/arch/sparc/prom/bootstr_64.c new file mode 100644 index 000000000..f1cc34d99 --- /dev/null +++ b/arch/sparc/prom/bootstr_64.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * bootstr.c: Boot string/argument acquisition from the PROM. + * + * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu) + * Copyright(C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + */ + +#include <linux/string.h> +#include <linux/init.h> +#include <asm/oplib.h> + +/* WARNING: The boot loader knows that these next three variables come one right + * after another in the .data section. Do not move this stuff into + * the .bss section or it will break things. + */ + +/* We limit BARG_LEN to 1024 because this is the size of the + * 'barg_out' command line buffer in the SILO bootloader. + */ +#define BARG_LEN 1024 +struct { + int bootstr_len; + int bootstr_valid; + char bootstr_buf[BARG_LEN]; +} bootstr_info = { + .bootstr_len = BARG_LEN, +#ifdef CONFIG_CMDLINE + .bootstr_valid = 1, + .bootstr_buf = CONFIG_CMDLINE, +#endif +}; + +char * __init +prom_getbootargs(void) +{ + /* This check saves us from a panic when bootfd patches args. */ + if (bootstr_info.bootstr_valid) + return bootstr_info.bootstr_buf; + prom_getstring(prom_chosen_node, "bootargs", + bootstr_info.bootstr_buf, BARG_LEN); + bootstr_info.bootstr_valid = 1; + return bootstr_info.bootstr_buf; +} |