LXR linux/arch/mips/lemote/lm2e/setup.c

   1/*
   2 * BRIEF MODULE DESCRIPTION
   3 * setup.c - board dependent boot routines
   4 *
   5 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
   6 * Author: Fuxin Zhang, zhangfx@lemote.com
   7 *
   8 *  This program is free software; you can redistribute  it and/or modify it
   9 *  under  the terms of  the GNU General  Public License as published by the
  10 *  Free Software Foundation;  either version 2 of the  License, or (at your
  11 *  option) any later version.
  12 *
  13 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23 *
  24 *  You should have received a copy of the  GNU General Public License along
  25 *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26 *  675 Mass Ave, Cambridge, MA 02139, USA.
  27 *
  28 */
  29#include <linux/bootmem.h>
  30#include <linux/init.h>
  31#include <linux/irq.h>
  32
  33#include <asm/bootinfo.h>
  34#include <asm/mc146818-time.h>
  35#include <asm/time.h>
  36#include <asm/wbflush.h>
  37
  38#ifdef CONFIG_VT
  39#include <linux/console.h>
  40#include <linux/screen_info.h>
  41#endif
  42
  43extern void mips_reboot_setup(void);
  44
  45#ifdef CONFIG_64BIT
  46#define PTR_PAD(p) ((0xffffffff00000000)|((unsigned long long)(p)))
  47#else
  48#define PTR_PAD(p) (p)
  49#endif
  50
  51unsigned long cpu_clock_freq;
  52unsigned long bus_clock;
  53unsigned int memsize;
  54unsigned int highmemsize = 0;
  55
  56void __init plat_time_init(void)
  57{
  58        /* setup mips r4k timer */
  59        mips_hpt_frequency = cpu_clock_freq / 2;
  60}
  61
  62unsigned long read_persistent_clock(void)
  63{
  64        return mc146818_get_cmos_time();
  65}
  66
  67void (*__wbflush)(void);
  68EXPORT_SYMBOL(__wbflush);
  69
  70static void wbflush_loongson2e(void)
  71{
  72        asm(".set\tpush\n\t"
  73            ".set\tnoreorder\n\t"
  74            ".set mips3\n\t"
  75            "sync\n\t"
  76            "nop\n\t"
  77            ".set\tpop\n\t"
  78            ".set mips0\n\t");
  79}
  80
  81void __init plat_mem_setup(void)
  82{
  83        set_io_port_base(PTR_PAD(0xbfd00000));
  84
  85        mips_reboot_setup();
  86
  87        __wbflush = wbflush_loongson2e;
  88
  89        add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
  90#ifdef CONFIG_64BIT
  91        if (highmemsize > 0) {
  92                add_memory_region(0x20000000, highmemsize << 20, BOOT_MEM_RAM);
  93        }
  94#endif
  95
  96#ifdef CONFIG_VT
  97#if defined(CONFIG_VGA_CONSOLE)
  98        conswitchp = &vga_con;
  99
 100        screen_info = (struct screen_info) {
 101                0, 25,          /* orig-x, orig-y */
 102                    0,          /* unused */
 103                    0,          /* orig-video-page */
 104                    0,          /* orig-video-mode */
 105                    80,         /* orig-video-cols */
 106                    0, 0, 0,    /* ega_ax, ega_bx, ega_cx */
 107                    25,         /* orig-video-lines */
 108                    VIDEO_TYPE_VGAC,    /* orig-video-isVGA */
 109                    16          /* orig-video-points */
 110        };
 111#elif defined(CONFIG_DUMMY_CONSOLE)
 112        conswitchp = &dummy_con;
 113#endif
 114#endif
 115
 116}
 117