2017-12-26 03:54:35 +08:00
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
//
|
|
|
|
// Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
|
|
|
|
// http://www.samsung.com
|
|
|
|
//
|
|
|
|
// Samsung CPU Support
|
2011-08-20 11:18:07 +08:00
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/io.h>
|
|
|
|
|
2014-07-03 19:17:12 +08:00
|
|
|
#include <plat/map-base.h>
|
2011-08-20 11:18:07 +08:00
|
|
|
#include <plat/cpu.h>
|
|
|
|
|
|
|
|
unsigned long samsung_cpu_id;
|
|
|
|
static unsigned int samsung_cpu_rev;
|
|
|
|
|
|
|
|
unsigned int samsung_rev(void)
|
|
|
|
{
|
|
|
|
return samsung_cpu_rev;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(samsung_rev);
|
|
|
|
|
|
|
|
void __init s3c64xx_init_cpu(void)
|
|
|
|
{
|
2016-06-21 18:20:23 +08:00
|
|
|
samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0x118);
|
2011-08-20 11:18:07 +08:00
|
|
|
if (!samsung_cpu_id) {
|
|
|
|
/*
|
|
|
|
* S3C6400 has the ID register in a different place,
|
|
|
|
* and needs a write before it can be read.
|
|
|
|
*/
|
2016-06-21 18:20:23 +08:00
|
|
|
writel_relaxed(0x0, S3C_VA_SYS + 0xA1C);
|
|
|
|
samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0xA1C);
|
2011-08-20 11:18:07 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
samsung_cpu_rev = 0;
|
2014-11-26 14:43:35 +08:00
|
|
|
|
|
|
|
pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
|
2011-08-20 11:18:07 +08:00
|
|
|
}
|
|
|
|
|
2016-07-05 21:56:54 +08:00
|
|
|
void __init s5p_init_cpu(const void __iomem *cpuid_addr)
|
2011-08-20 11:18:07 +08:00
|
|
|
{
|
2016-06-21 18:20:23 +08:00
|
|
|
samsung_cpu_id = readl_relaxed(cpuid_addr);
|
2011-08-20 11:18:07 +08:00
|
|
|
samsung_cpu_rev = samsung_cpu_id & 0xFF;
|
2014-11-26 14:43:35 +08:00
|
|
|
|
|
|
|
pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
|
2011-08-20 11:18:07 +08:00
|
|
|
}
|