32 lines
709 B
C
32 lines
709 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
|
|
// http://www.samsung.com
|
|
//
|
|
// Samsung CPU Support
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/map-base.h>
|
|
#include "cpu.h"
|
|
|
|
unsigned long samsung_cpu_id;
|
|
|
|
void __init s3c64xx_init_cpu(void)
|
|
{
|
|
samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0x118);
|
|
if (!samsung_cpu_id) {
|
|
/*
|
|
* S3C6400 has the ID register in a different place,
|
|
* and needs a write before it can be read.
|
|
*/
|
|
writel_relaxed(0x0, S3C_VA_SYS + 0xA1C);
|
|
samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0xA1C);
|
|
}
|
|
|
|
pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
|
|
}
|