arch/arm/plat-mxc/include/mach/debug-macro.S

   1 /* arch/arm/mach-imx/include/mach/debug-macro.S
   2  *
   3  * Debugging macro include header
   4  *
   5  *  Copyright (C) 1994-1999 Russell King
   6  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
   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
  14 #ifdef CONFIG_ARCH_MX1
  15 #include <mach/mx1.h>
  16 #define UART_PADDR      UART1_BASE_ADDR
  17 #define UART_VADDR      IO_ADDRESS(UART1_BASE_ADDR)
  18 #endif
  19
  20 #ifdef CONFIG_ARCH_MX25
  21 #ifdef UART_PADDR
  22 #error "CONFIG_DEBUG_LL is incompatible with multiple archs"
  23 #endif
  24 #include <mach/mx25.h>
  25 #define UART_PADDR      UART1_BASE_ADDR
  26 #define UART_VADDR      MX25_AIPS1_IO_ADDRESS(UART1_BASE_ADDR)
  27 #endif
  28
  29 #ifdef CONFIG_ARCH_MX2
  30 #ifdef UART_PADDR
  31 #error "CONFIG_DEBUG_LL is incompatible with multiple archs"
  32 #endif
  33 #include <mach/mx2x.h>
  34 #define UART_PADDR      UART1_BASE_ADDR
  35 #define UART_VADDR      AIPI_IO_ADDRESS(UART1_BASE_ADDR)
  36 #endif
  37
  38 #ifdef CONFIG_ARCH_MX3
  39 #ifdef UART_PADDR
  40 #error "CONFIG_DEBUG_LL is incompatible with multiple archs"
  41 #endif
  42 #include <mach/mx3x.h>
  43 #define UART_PADDR      UART1_BASE_ADDR
  44 #define UART_VADDR      AIPS1_IO_ADDRESS(UART1_BASE_ADDR)
  45 #endif
  46
  47                 .macro  addruart,rx
  48                 mrc     p15, 0, \rx, c1, c0
  49                 tst     \rx, #1                 @ MMU enabled?
  50                 ldreq   \rx, =UART_PADDR        @ physical
  51                 ldrne   \rx, =UART_VADDR        @ virtual
  52                 .endm
  53
  54                 .macro  senduart,rd,rx
  55                 str     \rd, [\rx, #0x40]       @ TXDATA
  56                 .endm
  57
  58                 .macro  waituart,rd,rx
  59                 .endm
  60
  61                 .macro  busyuart,rd,rx
  62 1002:           ldr     \rd, [\rx, #0x98]       @ SR2
  63                 tst     \rd, #1 << 3            @ TXDC
  64                 beq     1002b                   @ wait until transmit done
  65                 .endm