mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 06:00:43 +00:00
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>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
|
|
* Copyright 2008 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* Version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <addr_map.h>
|
|
|
|
static struct {
|
|
phys_addr_t paddr;
|
|
phys_size_t size;
|
|
unsigned long vaddr;
|
|
} address_map[CONFIG_SYS_NUM_ADDR_MAP];
|
|
|
|
phys_addr_t addrmap_virt_to_phys(void * vaddr)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
|
|
u64 base, upper, addr;
|
|
|
|
if (address_map[i].size == 0)
|
|
continue;
|
|
|
|
addr = (u64)((u32)vaddr);
|
|
base = (u64)(address_map[i].vaddr);
|
|
upper = (u64)(address_map[i].size) + base - 1;
|
|
|
|
if (addr >= base && addr <= upper) {
|
|
return addr - address_map[i].vaddr + address_map[i].paddr;
|
|
}
|
|
}
|
|
|
|
return (phys_addr_t)(~0);
|
|
}
|
|
|
|
unsigned long addrmap_phys_to_virt(phys_addr_t paddr)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++) {
|
|
u64 base, upper, addr;
|
|
|
|
if (address_map[i].size == 0)
|
|
continue;
|
|
|
|
addr = (u64)paddr;
|
|
base = (u64)(address_map[i].paddr);
|
|
upper = (u64)(address_map[i].size) + base - 1;
|
|
|
|
if (addr >= base && addr <= upper) {
|
|
return paddr - address_map[i].paddr + address_map[i].vaddr;
|
|
}
|
|
}
|
|
|
|
return (unsigned long)(~0);
|
|
}
|
|
|
|
void addrmap_set_entry(unsigned long vaddr, phys_addr_t paddr,
|
|
phys_size_t size, int idx)
|
|
{
|
|
if (idx > CONFIG_SYS_NUM_ADDR_MAP)
|
|
return;
|
|
|
|
address_map[idx].vaddr = vaddr;
|
|
address_map[idx].paddr = paddr;
|
|
address_map[idx].size = size;
|
|
}
|