drivers/misc/fsl_law.c

   1 /*
   2  * Copyright 2008 Freescale Semiconductor, Inc.
   3  *
   4  * (C) Copyright 2000
   5  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <asm/fsl_law.h>
  28 #include <asm/io.h>
  29
  30 #define LAWAR_EN        0x80000000
  31 #define FSL_HW_NUM_LAWS 10      /* number of LAWs in the hw implementation */
  32
  33 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
  34 {
  35         volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
  36         volatile u32 *lawbar = base + 8 * idx;
  37         volatile u32 *lawar = base + 8 * idx + 2;
  38
  39         out_be32(lawbar, addr >> 12);
  40         out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
  41
  42         return ;
  43 }
  44
  45 void disable_law(u8 idx)
  46 {
  47         volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
  48         volatile u32 *lawbar = base + 8 * idx;
  49         volatile u32 *lawar = base + 8 * idx + 2;
  50
  51         out_be32(lawar, 0);
  52         out_be32(lawbar, 0);
  53
  54         return;
  55 }
  56
  57 void print_laws(void)
  58 {
  59         volatile u32 *base = (volatile u32 *)(CFG_IMMR + 0xc08);
  60         volatile u32 *lawbar = base;
  61         volatile u32 *lawar = base + 2;
  62         int i;
  63
  64         printf("\nLocal Access Window Configuration\n");
  65         for(i = 0; i < FSL_HW_NUM_LAWS; i++) {
  66                 printf("\tLAWBAR%d : 0x%08x, LAWAR%d : 0x%08x\n",
  67                        i, in_be32(lawbar), i, in_be32(lawar));
  68                 lawbar += 8;
  69                 lawar += 8;
  70         }
  71
  72         return;
  73 }
  74
  75 void init_laws(void)
  76 {
  77         int i;
  78         u8 law_idx = 0;
  79
  80         for (i = 0; i < num_law_entries; i++) {
  81                 if (law_table[i].index != -1)
  82                         law_idx = law_table[i].index;
  83
  84                 set_law(law_idx++, law_table[i].addr,
  85                         law_table[i].size, law_table[i].trgt_id);
  86         }
  87
  88         return ;
  89 }