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63240ba88c
Add a library that helps in translating between virtual and physical addresses. This library can be useful as a simple means to implement map_physmem() and virt_to_phys() for platforms that need functionality beyond the simple 1:1 mapping. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <addr_map.h>
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static struct {
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phys_addr_t paddr;
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phys_size_t size;
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unsigned long vaddr;
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} address_map[CONFIG_SYS_NUM_ADDR_MAP];
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phys_addr_t addrmap_virt_to_phys(void * vaddr)
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{
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int i;
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for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
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u64 base, upper, addr;
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if (address_map[i].size == 0)
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continue;
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addr = (u64)((u32)vaddr);
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base = (u64)(address_map[i].vaddr);
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upper = (u64)(address_map[i].size) + base - 1;
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if (addr >= base && addr <= upper) {
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return addr - address_map[i].vaddr + address_map[i].paddr;
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}
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}
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return (phys_addr_t)(~0);
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}
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unsigned long addrmap_phys_to_virt(phys_addr_t paddr)
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{
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int i;
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for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
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u64 base, upper, addr;
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if (address_map[i].size == 0)
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continue;
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addr = (u64)paddr;
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base = (u64)(address_map[i].paddr);
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upper = (u64)(address_map[i].size) + base - 1;
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if (addr >= base && addr <= upper) {
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return paddr - address_map[i].paddr + address_map[i].vaddr;
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}
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}
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return (unsigned long)(~0);
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}
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void addrmap_set_entry(unsigned long vaddr, phys_addr_t paddr,
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phys_size_t size, int idx)
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{
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if (idx > CONFIG_SYS_NUM_ADDR_MAP)
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return;
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address_map[idx].vaddr = vaddr;
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address_map[idx].paddr = paddr;
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address_map[idx].size = size;
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}
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