lib/addr_map.c

   1 /*
   2  * Copyright 2008 Freescale Semiconductor, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * Version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  16  * MA 02111-1307 USA
  17  */
  18
  19 #include <common.h>
  20 #include <addr_map.h>
  21
  22 static struct {
  23         phys_addr_t paddr;
  24         phys_size_t size;
  25         unsigned long vaddr;
  26 } address_map[CONFIG_SYS_NUM_ADDR_MAP];
  27
  28 phys_addr_t addrmap_virt_to_phys(void * vaddr)
  29 {
  30         int i;
  31
  32         for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
  33                 u64 base, upper, addr;
  34
  35                 if (address_map[i].size == 0)
  36                         continue;
  37
  38                 addr = (u64)((u32)vaddr);
  39                 base = (u64)(address_map[i].vaddr);
  40                 upper = (u64)(address_map[i].size) + base - 1;
  41
  42                 if (addr >= base && addr <= upper) {
  43                         return addr - address_map[i].vaddr + address_map[i].paddr;
  44                 }
  45         }
  46
  47         return (phys_addr_t)(~0);
  48 }
  49
  50 void *addrmap_phys_to_virt(phys_addr_t paddr)
  51 {
  52         int i;
  53
  54         for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
  55                 phys_addr_t base, upper;
  56
  57                 if (address_map[i].size == 0)
  58                         continue;
  59
  60                 base = address_map[i].paddr;
  61                 upper = address_map[i].size + base - 1;
  62
  63                 if (paddr >= base && paddr <= upper) {
  64                         phys_addr_t offset;
  65
  66                         offset = address_map[i].paddr - address_map[i].vaddr;
  67
  68                         return (void *)(unsigned long)(paddr - offset);
  69                 }
  70         }
  71
  72         return (void *)(~0);
  73 }
  74
  75 void addrmap_set_entry(unsigned long vaddr, phys_addr_t paddr,
  76                         phys_size_t size, int idx)
  77 {
  78         if (idx > CONFIG_SYS_NUM_ADDR_MAP)
  79                 return;
  80
  81         address_map[idx].vaddr = vaddr;
  82         address_map[idx].paddr = paddr;
  83         address_map[idx].size  = size;
  84 }