mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
2f9943beb3
If a file does not exist, it should be created.
Fixes: f676b45151 ("fs: Add semihosting filesystem")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
119 lines
2.2 KiB
C
119 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2022, Sean Anderson <sean.anderson@seco.com>
|
|
* Copyright (c) 2012, Google Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <fs.h>
|
|
#include <malloc.h>
|
|
#include <os.h>
|
|
#include <semihosting.h>
|
|
#include <semihostingfs.h>
|
|
|
|
int smh_fs_set_blk_dev(struct blk_desc *rbdd, struct disk_partition *info)
|
|
{
|
|
/*
|
|
* Only accept a NULL struct blk_desc for the semihosting, which is when
|
|
* hostfs interface is used
|
|
*/
|
|
return !!rbdd;
|
|
}
|
|
|
|
static int smh_fs_read_at(const char *filename, loff_t pos, void *buffer,
|
|
loff_t maxsize, loff_t *actread)
|
|
{
|
|
long fd, size, ret;
|
|
|
|
fd = smh_open(filename, MODE_READ | MODE_BINARY);
|
|
if (fd < 0)
|
|
return fd;
|
|
ret = smh_seek(fd, pos);
|
|
if (ret < 0) {
|
|
smh_close(fd);
|
|
return ret;
|
|
}
|
|
if (!maxsize) {
|
|
size = smh_flen(fd);
|
|
if (ret < 0) {
|
|
smh_close(fd);
|
|
return size;
|
|
}
|
|
|
|
maxsize = size;
|
|
}
|
|
|
|
size = smh_read(fd, buffer, maxsize);
|
|
smh_close(fd);
|
|
if (size < 0)
|
|
return size;
|
|
|
|
*actread = size;
|
|
return 0;
|
|
}
|
|
|
|
static int smh_fs_write_at(const char *filename, loff_t pos, void *buffer,
|
|
loff_t towrite, loff_t *actwrite)
|
|
{
|
|
long fd, size, ret;
|
|
|
|
/* Try to open existing file */
|
|
fd = smh_open(filename, MODE_READ | MODE_BINARY | MODE_PLUS);
|
|
if (fd < 0)
|
|
/* Create new file */
|
|
fd = smh_open(filename, MODE_WRITE | MODE_BINARY);
|
|
if (fd < 0)
|
|
return fd;
|
|
ret = smh_seek(fd, pos);
|
|
if (ret < 0) {
|
|
smh_close(fd);
|
|
return ret;
|
|
}
|
|
|
|
ret = smh_write(fd, buffer, towrite, &size);
|
|
smh_close(fd);
|
|
*actwrite = size;
|
|
return ret;
|
|
}
|
|
|
|
int smh_fs_size(const char *filename, loff_t *result)
|
|
{
|
|
long fd, size;
|
|
|
|
fd = smh_open(filename, MODE_READ | MODE_BINARY);
|
|
if (fd < 0)
|
|
return fd;
|
|
|
|
size = smh_flen(fd);
|
|
smh_close(fd);
|
|
|
|
if (size < 0)
|
|
return size;
|
|
|
|
*result = size;
|
|
return 0;
|
|
}
|
|
|
|
int smh_fs_read(const char *filename, void *buf, loff_t offset, loff_t len,
|
|
loff_t *actread)
|
|
{
|
|
int ret;
|
|
|
|
ret = smh_fs_read_at(filename, offset, buf, len, actread);
|
|
if (ret)
|
|
printf("** Unable to read file %s **\n", filename);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int smh_fs_write(const char *filename, void *buf, loff_t offset,
|
|
loff_t len, loff_t *actwrite)
|
|
{
|
|
int ret;
|
|
|
|
ret = smh_fs_write_at(filename, offset, buf, len, actwrite);
|
|
if (ret)
|
|
printf("** Unable to write file %s **\n", filename);
|
|
|
|
return ret;
|
|
}
|