1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Based on Ocelot Linux port, which is
 4 * Copyright 2001 MontaVista Software Inc.
 5 * Author: jsun@mvista.com or jsun@junsun.net
 6 *
 7 * Copyright 2003 ICT CAS
 8 * Author: Michael Guo <guoyi@ict.ac.cn>
 9 *
10 * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
11 * Author: Fuxin Zhang, zhangfx@lemote.com
12 *
13 * Copyright (C) 2009 Lemote Inc.
14 * Author: Wu Zhangjin, wuzhangjin@gmail.com
15 */
16#include <linux/export.h>
17#include <asm/bootinfo.h>
18#include <asm/fw/fw.h>
19#include <loongson.h>
20
21u32 cpu_clock_freq;
22EXPORT_SYMBOL(cpu_clock_freq);
23
24void __init prom_init_env(void)
25{
26	/* pmon passes arguments in 32bit pointers */
27	unsigned int processor_id;
28
29	cpu_clock_freq = fw_getenvl("cpuclock");
30	memsize = fw_getenvl("memsize");
31	highmemsize = fw_getenvl("highmemsize");
32
33	if (memsize == 0)
34		memsize = 256;
35
36	pr_info("memsize=%u, highmemsize=%u\n", memsize, highmemsize);
37
38	if (cpu_clock_freq == 0) {
39		processor_id = (&current_cpu_data)->processor_id;
40		switch (processor_id & PRID_REV_MASK) {
41		case PRID_REV_LOONGSON2E:
42			cpu_clock_freq = 533080000;
43			break;
44		case PRID_REV_LOONGSON2F:
45			cpu_clock_freq = 797000000;
46			break;
47		default:
48			cpu_clock_freq = 100000000;
49			break;
50		}
51	}
52	pr_info("CpuClock = %u\n", cpu_clock_freq);
53}

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Based on Ocelot Linux port, which is
 4 * Copyright 2001 MontaVista Software Inc.
 5 * Author: jsun@mvista.com or jsun@junsun.net
 6 *
 7 * Copyright 2003 ICT CAS
 8 * Author: Michael Guo <guoyi@ict.ac.cn>
 9 *
10 * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
11 * Author: Fuxin Zhang, zhangfx@lemote.com
12 *
13 * Copyright (C) 2009 Lemote Inc.
14 * Author: Wu Zhangjin, wuzhangjin@gmail.com
15 */
16#include <linux/export.h>
17#include <asm/bootinfo.h>
18#include <asm/fw/fw.h>
19#include <loongson.h>
20
21u32 cpu_clock_freq;
22EXPORT_SYMBOL(cpu_clock_freq);
23
24void __init prom_init_env(void)
25{
26	/* pmon passes arguments in 32bit pointers */
27	unsigned int processor_id;
28
29	cpu_clock_freq = fw_getenvl("cpuclock");
30	memsize = fw_getenvl("memsize");
31	highmemsize = fw_getenvl("highmemsize");
32
33	if (memsize == 0)
34		memsize = 256;
35
36	pr_info("memsize=%u, highmemsize=%u\n", memsize, highmemsize);
37
38	if (cpu_clock_freq == 0) {
39		processor_id = (&current_cpu_data)->processor_id;
40		switch (processor_id & PRID_REV_MASK) {
41		case PRID_REV_LOONGSON2E:
42			cpu_clock_freq = 533080000;
43			break;
44		case PRID_REV_LOONGSON2F:
45			cpu_clock_freq = 797000000;
46			break;
47		default:
48			cpu_clock_freq = 100000000;
49			break;
50		}
51	}
52	pr_info("CpuClock = %u\n", cpu_clock_freq);
53}