projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b00dc837 | 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 | * 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 | ||
| 1cef94c3 DK |
17 | /* We limit BARG_LEN to 1024 because this is the size of the |
| 18 | * 'barg_out' command line buffer in the SILO bootloader. | |
| 19 | */ | |
| 20 | #define BARG_LEN 1024 | |
| 1da177e4 LT |
21 | struct { |
| 22 | int bootstr_len; | |
| 23 | int bootstr_valid; | |
| 24 | char bootstr_buf[BARG_LEN]; | |
| 25 | } bootstr_info = { | |
| 26 | .bootstr_len = BARG_LEN, | |
| 27 | #ifdef CONFIG_CMDLINE | |
| 28 | .bootstr_valid = 1, | |
| 29 | .bootstr_buf = CONFIG_CMDLINE, | |
| 30 | #endif | |
| 31 | }; | |
| 32 | ||
| 33 | char * __init | |
| 34 | prom_getbootargs(void) | |
| 35 | { | |
| 36 | /* This check saves us from a panic when bootfd patches args. */ | |
| 37 | if (bootstr_info.bootstr_valid) | |
| 38 | return bootstr_info.bootstr_buf; | |
| 39 | prom_getstring(prom_chosen_node, "bootargs", | |
| 40 | bootstr_info.bootstr_buf, BARG_LEN); | |
| 41 | bootstr_info.bootstr_valid = 1; | |
| 42 | return bootstr_info.bootstr_buf; | |
| 43 | } |