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/dma-mapping.h>
  18 #include <linux/omapfb.h>
  19
  20 #include <plat/common.h>
  21 #include <plat/board.h>
  22 #include <plat/vram.h>
  23 #include <plat/dsp.h>
  24
  25 #include <plat/omap-secure.h>
  26
  27
  28 #define NO_LENGTH_CHECK 0xffffffff
  29
  30 struct omap_board_config_kernel *omap_board_config __initdata;
  31 int omap_board_config_size;
  32
  33 static const void *__init get_config(u16 tag, size_t len,
  34                 int skip, size_t *len_out)
  35 {
  36         struct omap_board_config_kernel *kinfo = NULL;
  37         int i;
  38
  39         /* Try to find the config from the board-specific structures
  40          * in the kernel. */
  41         for (i = 0; i < omap_board_config_size; i++) {
  42                 if (omap_board_config[i].tag == tag) {
  43                         if (skip == 0) {
  44                                 kinfo = &omap_board_config[i];
  45                                 break;
  46                         } else {
  47                                 skip--;
  48                         }
  49                 }
  50         }
  51         if (kinfo == NULL)
  52                 return NULL;
  53         return kinfo->data;
  54 }
  55
  56 const void *__init __omap_get_config(u16 tag, size_t len, int nr)
  57 {
  58         return get_config(tag, len, nr, NULL);
  59 }
  60
  61 const void *__init omap_get_var_config(u16 tag, size_t *len)
  62 {
  63         return get_config(tag, NO_LENGTH_CHECK, 0, len);
  64 }
  65
  66 void __init omap_reserve(void)
  67 {
  68         omapfb_reserve_sdram_memblock();
  69         omap_vram_reserve_sdram_memblock();
  70         omap_dsp_reserve_sdram_memblock();
  71         omap_secure_ram_reserve_memblock();
  72         omap_barrier_reserve_memblock();
  73 }
  74
  75 void __init omap_init_consistent_dma_size(void)
  76 {
  77 #ifdef CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE
  78         init_consistent_dma_size(CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE << 20);
  79 #endif
  80 }