include/asm-arm/arch-at91/hardware.h

   1 /*
   2  * include/asm-arm/arch-at91/hardware.h
   3  *
   4  *  Copyright (C) 2003 SAN People
   5  *  Copyright (C) 2003 ATMEL
   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 as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  */
  13
  14 #ifndef __ASM_ARCH_HARDWARE_H
  15 #define __ASM_ARCH_HARDWARE_H
  16
  17 #include <asm/sizes.h>
  18
  19 #if defined(CONFIG_ARCH_AT91RM9200)
  20 #include <asm/arch/at91rm9200.h>
  21 #elif defined(CONFIG_ARCH_AT91SAM9260)
  22 #include <asm/arch/at91sam9260.h>
  23 #elif defined(CONFIG_ARCH_AT91SAM9261)
  24 #include <asm/arch/at91sam9261.h>
  25 #elif defined(CONFIG_ARCH_AT91SAM9263)
  26 #include <asm/arch/at91sam9263.h>
  27 #else
  28 #error "Unsupported AT91 processor"
  29 #endif
  30
  31
  32 /*
  33  * Remap the peripherals from address 0xFFF78000 .. 0xFFFFFFFF
  34  * to 0xFEF78000 .. 0xFF000000.  (5444Kb)
  35  */
  36 #define AT91_IO_PHYS_BASE       0xFFF78000
  37 #define AT91_IO_SIZE            (0xFFFFFFFF - AT91_IO_PHYS_BASE + 1)
  38 #define AT91_IO_VIRT_BASE       (0xFF000000 - AT91_IO_SIZE)
  39
  40  /* Convert a physical IO address to virtual IO address */
  41 #define AT91_IO_P2V(x)          ((x) - AT91_IO_PHYS_BASE + AT91_IO_VIRT_BASE)
  42
  43 /*
  44  * Virtual to Physical Address mapping for IO devices.
  45  */
  46 #define AT91_VA_BASE_SYS        AT91_IO_P2V(AT91_BASE_SYS)
  47 #define AT91_VA_BASE_EMAC       AT91_IO_P2V(AT91RM9200_BASE_EMAC)
  48
  49  /* Internal SRAM is mapped below the IO devices */
  50 #define AT91_SRAM_MAX           SZ_1M
  51 #define AT91_VIRT_BASE          (AT91_IO_VIRT_BASE - AT91_SRAM_MAX)
  52
  53 /* Serial ports */
  54 #define ATMEL_MAX_UART          7               /* 6 USART3's and one DBGU port (SAM9260) */
  55
  56 /* External Memory Map */
  57 #define AT91_CHIPSELECT_0       0x10000000
  58 #define AT91_CHIPSELECT_1       0x20000000
  59 #define AT91_CHIPSELECT_2       0x30000000
  60 #define AT91_CHIPSELECT_3       0x40000000
  61 #define AT91_CHIPSELECT_4       0x50000000
  62 #define AT91_CHIPSELECT_5       0x60000000
  63 #define AT91_CHIPSELECT_6       0x70000000
  64 #define AT91_CHIPSELECT_7       0x80000000
  65
  66 /* SDRAM */
  67 #define AT91_SDRAM_BASE         AT91_CHIPSELECT_1
  68
  69 /* Clocks */
  70 #define AT91_SLOW_CLOCK         32768           /* slow clock */
  71
  72 #ifndef __ASSEMBLY__
  73 #include <asm/io.h>
  74
  75 static inline unsigned int at91_sys_read(unsigned int reg_offset)
  76 {
  77         void __iomem *addr = (void __iomem *)AT91_VA_BASE_SYS;
  78
  79         return __raw_readl(addr + reg_offset);
  80 }
  81
  82 static inline void at91_sys_write(unsigned int reg_offset, unsigned long value)
  83 {
  84         void __iomem *addr = (void __iomem *)AT91_VA_BASE_SYS;
  85
  86         __raw_writel(value, addr + reg_offset);
  87 }
  88 #endif
  89
  90 #endif