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 #include <plat/uncompress.h>
  19
  20 static unsigned int __raw_readl(unsigned int ptr)
  21 {
  22         return *((volatile unsigned int *)ptr);
  23 }
  24
  25 static void arch_detect_cpu(void)
  26 {
  27         u32 chip_id = __raw_readl(EXYNOS_PA_CHIPID);
  28
  29         /*
  30          * product_id is bits 31:12
  31          * bits 23:20 describe the exynosX family
  32          * bits 27:24 describe the exynosX family in exynos5420
  33          */
  34         chip_id >>= 20;
  35
  36         if ((chip_id & 0x0f) == 0x5 || (chip_id & 0xf0) == 0x50)
  37                 uart_base = (volatile u8 *)EXYNOS5_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
  38         else
  39                 uart_base = (volatile u8 *)EXYNOS4_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
  40
  41         /*
  42          * For preventing FIFO overrun or infinite loop of UART console,
  43          * fifo_max should be the minimum fifo size of all of the UART channels
  44          */
  45         fifo_mask = S5PV210_UFSTAT_TXMASK;
  46         fifo_max = 15 << S5PV210_UFSTAT_TXSHIFT;
  47 }
  48 #endif /* __ASM_ARCH_UNCOMPRESS_H */