projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e6d1cb9f KK |
1 | /* linux/arch/arm/plat-samsung/cpu.c |
| 2 | * | |
| 3 | * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd. | |
| 4 | * http://www.samsung.com | |
| 5 | * | |
| 6 | * Samsung CPU Support | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/module.h> | |
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/init.h> | |
| 16 | #include <linux/io.h> | |
| 17 | ||
| e6d1cb9f KK |
18 | |
| 19 | #include <mach/map.h> | |
| 20 | #include <plat/cpu.h> | |
| 21 | ||
| 22 | unsigned long samsung_cpu_id; | |
| 23 | static unsigned int samsung_cpu_rev; | |
| 24 | ||
| 25 | unsigned int samsung_rev(void) | |
| 26 | { | |
| 27 | return samsung_cpu_rev; | |
| 28 | } | |
| 29 | EXPORT_SYMBOL(samsung_rev); | |
| 30 | ||
| 31 | void __init s3c24xx_init_cpu(void) | |
| 32 | { | |
| 33 | /* nothing here yet */ | |
| 34 | ||
| 35 | samsung_cpu_rev = 0; | |
| 36 | } | |
| 37 | ||
| 38 | void __init s3c64xx_init_cpu(void) | |
| 39 | { | |
| 40 | samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0x118); | |
| 41 | if (!samsung_cpu_id) { | |
| 42 | /* | |
| 43 | * S3C6400 has the ID register in a different place, | |
| 44 | * and needs a write before it can be read. | |
| 45 | */ | |
| 46 | __raw_writel(0x0, S3C_VA_SYS + 0xA1C); | |
| 47 | samsung_cpu_id = __raw_readl(S3C_VA_SYS + 0xA1C); | |
| 48 | } | |
| 49 | ||
| 50 | samsung_cpu_rev = 0; | |
| 51 | } | |
| 52 | ||
| 53 | void __init s5p_init_cpu(void __iomem *cpuid_addr) | |
| 54 | { | |
| 55 | samsung_cpu_id = __raw_readl(cpuid_addr); | |
| 56 | samsung_cpu_rev = samsung_cpu_id & 0xFF; | |
| 57 | } |