arch/all-pc/boot/grub2-aros/include/grub/cmos.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2008, 2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef GRUB_CMOS_H
  20 #define GRUB_CMOS_H     1
  21
  22 #include <grub/types.h>
  23 #if !defined (__powerpc__) && !defined (__sparc__)
  24 #include <grub/cpu/io.h>
  25 #include <grub/cpu/cmos.h>
  26 #endif
  27
  28 #define GRUB_CMOS_INDEX_SECOND          0
  29 #define GRUB_CMOS_INDEX_SECOND_ALARM    1
  30 #define GRUB_CMOS_INDEX_MINUTE          2
  31 #define GRUB_CMOS_INDEX_MINUTE_ALARM    3
  32 #define GRUB_CMOS_INDEX_HOUR            4
  33 #define GRUB_CMOS_INDEX_HOUR_ALARM      5
  34 #define GRUB_CMOS_INDEX_DAY_OF_WEEK     6
  35 #define GRUB_CMOS_INDEX_DAY_OF_MONTH    7
  36 #define GRUB_CMOS_INDEX_MONTH           8
  37 #define GRUB_CMOS_INDEX_YEAR            9
  38
  39 #define GRUB_CMOS_INDEX_STATUS_A        0xA
  40 #define GRUB_CMOS_INDEX_STATUS_B        0xB
  41 #define GRUB_CMOS_INDEX_STATUS_C        0xC
  42 #define GRUB_CMOS_INDEX_STATUS_D        0xD
  43
  44 #define GRUB_CMOS_STATUS_B_DAYLIGHT     1
  45 #define GRUB_CMOS_STATUS_B_24HOUR       2
  46 #define GRUB_CMOS_STATUS_B_BINARY       4
  47
  48 static inline grub_uint8_t
  49 grub_bcd_to_num (grub_uint8_t a)
  50 {
  51   return ((a >> 4) * 10 + (a & 0xF));
  52 }
  53
  54 static inline grub_uint8_t
  55 grub_num_to_bcd (grub_uint8_t a)
  56 {
  57   return (((a / 10) << 4) + (a % 10));
  58 }
  59
  60 #if !defined (__powerpc__) && !defined (__sparc__)
  61 static inline grub_err_t
  62 grub_cmos_read (grub_uint8_t index, grub_uint8_t *val)
  63 {
  64   if (index & 0x80)
  65     {
  66       grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG_HI);
  67       *val = grub_inb (GRUB_CMOS_DATA_REG_HI);
  68     }
  69   else
  70     {
  71       grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG);
  72       *val = grub_inb (GRUB_CMOS_DATA_REG);
  73     }
  74   return GRUB_ERR_NONE;
  75 }
  76
  77 static inline grub_err_t
  78 grub_cmos_write (grub_uint8_t index, grub_uint8_t value)
  79 {
  80   if (index & 0x80)
  81     {
  82       grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG_HI);
  83       grub_outb (value, GRUB_CMOS_DATA_REG_HI);
  84     }
  85   else
  86     {
  87       grub_outb (index & 0x7f, GRUB_CMOS_ADDR_REG);
  88       grub_outb (value, GRUB_CMOS_DATA_REG);
  89     }
  90   return GRUB_ERR_NONE;
  91 }
  92 #else
  93 grub_err_t grub_cmos_find_port (void);
  94 extern volatile grub_uint8_t *grub_cmos_port;
  95
  96 static inline grub_err_t
  97 grub_cmos_read (grub_uint8_t index, grub_uint8_t *val)
  98 {
  99   if (!grub_cmos_port)
 100     {
 101       grub_err_t err;
 102       err = grub_cmos_find_port ();
 103       if (err)
 104         return err;
 105     }
 106   grub_cmos_port[((index & 0x80) >> 6) | 0] = index & 0x7f;
 107   *val = grub_cmos_port[((index & 0x80) >> 6) | 1];
 108   return GRUB_ERR_NONE;
 109 }
 110
 111 static inline grub_err_t
 112 grub_cmos_write (grub_uint8_t index, grub_uint8_t val)
 113 {
 114   if (!grub_cmos_port)
 115     {
 116       grub_err_t err;
 117       err = grub_cmos_find_port ();
 118       if (err)
 119         return err;
 120     }
 121   grub_cmos_port[((index & 0x80) >> 6) | 0] = index;
 122   grub_cmos_port[((index & 0x80) >> 6) | 1] = val;
 123   return GRUB_ERR_NONE;
 124 }
 125
 126 #endif
 127
 128 #endif /* GRUB_CMOS_H */