arch/arm/plat-omap/common.c

   1 /*
   2  * linux/arch/arm/plat-omap/common.c
   3  *
   4  * Code common to all OMAP machines.
   5  * The file is created by Tony Lindgren <tony@atomide.com>
   6  *
   7  * Copyright (C) 2009 Texas Instruments
   8  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/io.h>
  17 #include <linux/omapfb.h>
  18
  19 #include <plat/common.h>
  20 #include <plat/board.h>
  21 #include <plat/vram.h>
  22 #include <plat/dsp.h>
  23
  24
  25 #define NO_LENGTH_CHECK 0xffffffff
  26
  27 struct omap_board_config_kernel *omap_board_config;
  28 int omap_board_config_size;
  29
  30 static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
  31 {
  32         struct omap_board_config_kernel *kinfo = NULL;
  33         int i;
  34
  35         /* Try to find the config from the board-specific structures
  36          * in the kernel. */
  37         for (i = 0; i < omap_board_config_size; i++) {
  38                 if (omap_board_config[i].tag == tag) {
  39                         if (skip == 0) {
  40                                 kinfo = &omap_board_config[i];
  41                                 break;
  42                         } else {
  43                                 skip--;
  44                         }
  45                 }
  46         }
  47         if (kinfo == NULL)
  48                 return NULL;
  49         return kinfo->data;
  50 }
  51
  52 const void *__omap_get_config(u16 tag, size_t len, int nr)
  53 {
  54         return get_config(tag, len, nr, NULL);
  55 }
  56 EXPORT_SYMBOL(__omap_get_config);
  57
  58 const void *omap_get_var_config(u16 tag, size_t *len)
  59 {
  60         return get_config(tag, NO_LENGTH_CHECK, 0, len);
  61 }
  62 EXPORT_SYMBOL(omap_get_var_config);
  63
  64 void __init omap_reserve(void)
  65 {
  66         omapfb_reserve_sdram_memblock();
  67         omap_vram_reserve_sdram_memblock();
  68         omap_dsp_reserve_sdram_memblock();
  69 }