sys/arch/hpc/stand/hpcboot/arm/arm_pxa2x0_console.h

   1 /* -*-C++-*-    $NetBSD$        */
   2
   3 /*-
   4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Rafal K. Boni.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _HPCBOOT_ARM_PXA2X0_CONSOLE_H_
  33 #define _HPCBOOT_ARM_PXA2X0_CONSOLE_H_
  34
  35 #include <hpcboot.h>
  36 #include <memory.h>
  37 #include <arm/arm_console.h>
  38
  39 class PXA2x0Console : public ARMConsole {
  40         friend class ARMConsole;
  41
  42 private:
  43         MemoryManager *&_mem;
  44         vaddr_t _uart_base;
  45
  46 private:
  47         PXA2x0Console(MemoryManager *& mem) : _mem(mem), _uart_base(~0) { }
  48         virtual ~PXA2x0Console() {
  49                 if (_uart_base != ~0)
  50                         _mem->unmapPhysicalPage(_uart_base);
  51         }
  52
  53         void __tx_busy(void) {
  54                 uint8_t reg;
  55                 do
  56                         reg = VOLATILE_REF8(_uart_base + 0x14);
  57                 while (!(reg & 0x20));
  58         }
  59
  60         void __clr_intr(void) {
  61                 uint8_t reg = VOLATILE_REF8(_uart_base + 0x08);
  62         }
  63
  64         virtual void __putc(const char s) {
  65                 __tx_busy(); // wait until previous transmit done.
  66                 VOLATILE_REF8(_uart_base + 0x00) =
  67                     static_cast <uint8_t>(0xff & s);
  68                 __tx_busy();  // wait until this transmit done.
  69                 __clr_intr(); // clear interrupt register
  70         }
  71
  72 public:
  73         virtual BOOL init(void) {
  74                 if (!SerialConsole::init())
  75                         return FALSE;
  76
  77                 _uart_base =
  78                     _mem->mapPhysicalPage(0x40100000, 0x100, PAGE_READWRITE);
  79
  80                 if (_uart_base == ~0)
  81                         return FALSE;
  82
  83                 return TRUE;
  84         }
  85 };
  86 #endif //_HPCBOOT_ARM_PXA2X0_CONSOLE_H_