arch/arm/mach-picoxcell/include/mach/debug-macro.S

   1 /*
   2  * Copyright (c) 2011 Picochip Ltd., Jamie Iles
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
   9  * accesses to the 8250.
  10  */
  11 #include <linux/serial_reg.h>
  12 #include <mach/hardware.h>
  13 #include <mach/map.h>
  14
  15 #define UART_SHIFT 2
  16
  17                 .macro  addruart, rp, rv
  18                 ldr     \rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE)
  19                 ldr     \rp, =PICOXCELL_UART1_BASE
  20                 .endm
  21
  22                 .macro  senduart,rd,rx
  23                 str     \rd, [\rx, #UART_TX << UART_SHIFT]
  24                 .endm
  25
  26                 .macro  busyuart,rd,rx
  27 1002:           ldr     \rd, [\rx, #UART_LSR << UART_SHIFT]
  28                 and     \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
  29                 teq     \rd, #UART_LSR_TEMT | UART_LSR_THRE
  30                 bne     1002b
  31                 .endm
  32
  33                 /* The UART's don't have any flow control IO's wired up. */
  34                 .macro  waituart,rd,rx
  35                 .endm