projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| bd92aa01 WZ |
1 | /* |
| 2 | * Based on Ocelot Linux port, which is | |
| 3 | * Copyright 2001 MontaVista Software Inc. | |
| 4 | * Author: jsun@mvista.com or jsun@junsun.net | |
| 5 | * | |
| 6 | * Copyright 2003 ICT CAS | |
| 7 | * Author: Michael Guo <guoyi@ict.ac.cn> | |
| 8 | * | |
| 9 | * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology | |
| 10 | * Author: Fuxin Zhang, zhangfx@lemote.com | |
| 11 | * | |
| 12 | * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology | |
| 13 | * Author: Wu Zhangjin, wuzj@lemote.com | |
| 14 | * | |
| 15 | * This program is free software; you can redistribute it and/or modify it | |
| 16 | * under the terms of the GNU General Public License as published by the | |
| 17 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 18 | * option) any later version. | |
| 19 | */ | |
| 20 | ||
| 21 | #include <linux/io.h> | |
| 22 | #include <linux/init.h> | |
| 23 | ||
| 24 | #include <asm/bootinfo.h> | |
| 25 | ||
| 26 | unsigned long bus_clock, cpu_clock_freq; | |
| 27 | unsigned long memsize, highmemsize; | |
| 28 | ||
| 29 | /* pmon passes arguments in 32bit pointers */ | |
| 30 | int *_prom_envp; | |
| 31 | ||
| 32 | #define parse_even_earlier(res, option, p) \ | |
| 33 | do { \ | |
| 34 | if (strncmp(option, (char *)p, strlen(option)) == 0) \ | |
| 35 | strict_strtol((char *)p + strlen(option"="), \ | |
| 36 | 10, &res); \ | |
| 37 | } while (0) | |
| 38 | ||
| 39 | void __init prom_init_env(void) | |
| 40 | { | |
| 41 | long l; | |
| 42 | ||
| 43 | /* firmware arguments are initialized in head.S */ | |
| 44 | _prom_envp = (int *)fw_arg2; | |
| 45 | ||
| 46 | l = (long)*_prom_envp; | |
| 47 | while (l != 0) { | |
| 48 | parse_even_earlier(bus_clock, "busclock", l); | |
| 49 | parse_even_earlier(cpu_clock_freq, "cpuclock", l); | |
| 50 | parse_even_earlier(memsize, "memsize", l); | |
| 51 | parse_even_earlier(highmemsize, "highmemsize", l); | |
| 52 | _prom_envp++; | |
| 53 | l = (long)*_prom_envp; | |
| 54 | } | |
| 55 | if (memsize == 0) | |
| 56 | memsize = 256; | |
| 57 | ||
| 58 | pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n", | |
| 59 | bus_clock, cpu_clock_freq, memsize, highmemsize); | |
| 60 | } |