/* linux/arch/arm/plat-samsung/cpu.c * * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd. * http://www.samsung.com * * Samsung CPU Support * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/io.h> #include <mach/map.h> #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 s3c24xx_init_cpu(void) { /* nothing here yet */ samsung_cpu_rev = 0; } void __init s3c64xx_init_cpu(void) { samsung_cpu_id = __raw_readl(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. */ __raw_writel(0x0, S3C_VA_SYS + 0xA1C); samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0xA1C); } samsung_cpu_rev = 0; } void __init s5p_init_cpu(void __iomem *cpuid_addr) { samsung_cpu_id = __raw_readl(cpuid_addr); samsung_cpu_rev = samsung_cpu_id & 0xFF; }