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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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
*/
/**
* @file
* @brief Some common used memory functions
*
* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
*/
#include <common.h>
#include <init.h>
#include <driver.h>
#include <errno.h>
#include <fs.h>
#include <fcntl.h>
#include <getopt.h>
/** Shared data buffer for all memory commands */
char rw_buf[RW_BUF_SIZE];
/** The default device all memory commands are working on */
char memory_device[] = "/dev/mem";
/**
* Open the given file and seek to the specified file position
* @param[in] filename Guess what
* @param[in] mode Mode of operation (see O_*)
* @param[in] pos Position to seek to
* @return Valid filedescriptor on success, or negative value in case of errors
*/
int open_and_lseek(const char *filename, int mode, ulong pos)
{
int fd, ret;
fd = open(filename, mode | O_RDONLY);
if (fd < 0) {
perror("open");
return fd;
}
ret = lseek(fd, pos, SEEK_SET);
if (ret < 0) {
perror("lseek");
close(fd);
return ret;
}
return fd;
}
/**
* Parse the options common to all memory related commands
* @param[in] argc FIXME
* @param[in] argv FIXME
* @param[in] optstr FIXME
* @param[out] mode FIXME
* @param[out] sourcefile Pointer will be modified if -s param was given
* @param[out] destfile Pointer will be modified if -d param was given
* @return 0 on success, negative value in case of errors
*/
int mem_parse_options(int argc, char *argv[], char *optstr, int *mode,
char **sourcefile, char **destfile)
{
int opt;
getopt_reset();
while((opt = getopt(argc, argv, optstr)) > 0) {
switch(opt) {
case 'b':
*mode = O_RWSIZE_1;
break;
case 'w':
*mode = O_RWSIZE_2;
break;
case 'l':
*mode = O_RWSIZE_4;
break;
case 's':
*sourcefile = optarg;
break;
case 'd':
*destfile = optarg;
break;
default:
return -1;
}
}
return 0;
}
/** The generic memory device to represent the whole physical address space */
static struct device_d mem_dev = {
.name = "mem",
.id = "mem",
.map_base = 0, /**< starts at physical address 0 */
.size = ~0, /**< FIXME: should be 0x100000000, ahem... */
};
static struct driver_d mem_drv = {
.name = "mem",
.probe = dummy_probe,
.read = mem_read,
.write = mem_write,
};
static struct driver_d ram_drv = {
.name = "ram",
.probe = dummy_probe,
.read = mem_read,
.write = mem_write,
.type = DEVICE_TYPE_DRAM,
};
static struct driver_d rom_drv = {
.name = "rom",
.probe = dummy_probe,
.read = mem_read,
};
static int mem_init(void)
{
register_device(&mem_dev);
register_driver(&mem_drv);
register_driver(&ram_drv);
register_driver(&rom_drv);
return 0;
}
device_initcall(mem_init);
/**
* @page generic_devices Generic devices
*
* Most devices in U-Boot-v2 depending on the hardware and this means on the BSP.
* But some devices are generic for some platforms or architectures or some
* other are generic for all targets.
*
* \b /dev/mem
*
* This devices represents the whole physical address space of the running CPU.
* In the case you want to access some physical address, you can use this device.
* It starts at the offset 0x0000000 and ends at the highest available physical
* address of the running CPU.
*
* @note All memory commands are working with this device as default.
*/
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