arch/arm/mach-exynos/include/mach/uncompress.h

   1 /*
   2  * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com
   4  *
   5  * EXYNOS - uncompress code
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #ifndef __ASM_ARCH_UNCOMPRESS_H
  13 #define __ASM_ARCH_UNCOMPRESS_H __FILE__
  14
  15 #include <asm/mach-types.h>
  16
  17 #include <mach/map.h>
  18
  19 volatile u8 *uart_base;
  20
  21 #include <plat/uncompress.h>
  22
  23 static unsigned int __raw_readl(unsigned int ptr)
  24 {
  25         return *((volatile unsigned int *)ptr);
  26 }
  27
  28 static void arch_detect_cpu(void)
  29 {
  30         u32 chip_id = __raw_readl(EXYNOS_PA_CHIPID);
  31
  32         /*
  33          * product_id is bits 31:12
  34          *    bits 23:20 describe the exynosX family
  35          *
  36          */
  37         chip_id >>= 20;
  38         chip_id &= 0xf;
  39
  40         if (chip_id == 0x5)
  41                 uart_base = (volatile u8 *)EXYNOS5_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
  42         else
  43                 uart_base = (volatile u8 *)EXYNOS4_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
  44
  45         /*
  46          * For preventing FIFO overrun or infinite loop of UART console,
  47          * fifo_max should be the minimum fifo size of all of the UART channels
  48          */
  49         fifo_mask = S5PV210_UFSTAT_TXMASK;
  50         fifo_max = 15 << S5PV210_UFSTAT_TXSHIFT;
  51 }
  52 #endif /* __ASM_ARCH_UNCOMPRESS_H */