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
  43 extern 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
  51 unsigned long cpu_clock_freq;
  52 unsigned long bus_clock;
  53 unsigned int memsize;
  54 unsigned int highmemsize = 0;
  55
  56 void __init plat_time_init(void)
  57 {
  58         /* setup mips r4k timer */
  59         mips_hpt_frequency = cpu_clock_freq / 2;
  60 }
  61
  62 unsigned long read_persistent_clock(void)
  63 {
  64         return mc146818_get_cmos_time();
  65 }
  66
  67 void (*__wbflush)(void);
  68 EXPORT_SYMBOL(__wbflush);
  69
  70 static 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
  81 void __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 }