target/linux/ar71xx/image/lzma-loader/src/board.c

   1 /*
   2  * LZMA compressed kernel loader for Atheros AR7XXX/AR9XXX based boards
   3  *
   4  * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  */
  10
  11 #include <stddef.h>
  12 #include "config.h"
  13
  14 #define READREG(r)      *(volatile unsigned int *)(r)
  15 #define WRITEREG(r,v)   *(volatile unsigned int *)(r) = v
  16
  17 #define UART_BASE       0xb8020000
  18
  19 #define UART_TX         0
  20 #define UART_LSR        5
  21
  22 #define UART_LSR_THRE   0x20
  23
  24 #define UART_READ(r)            READREG(UART_BASE + 4 * (r))
  25 #define UART_WRITE(r,v)         WRITEREG(UART_BASE + 4 * (r), (v))
  26
  27 void board_putc(int ch)
  28 {
  29         while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
  30         UART_WRITE(UART_TX, ch);
  31         while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
  32 }
  33
  34 void board_init(void)
  35 {
  36 }