u-boot/board/synopsys/hsdk/env-lib.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

301 lines
6.1 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Synopsys, Inc. All rights reserved.
* Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
*/
#include "env-lib.h"
#define MAX_CMD_LEN 25
static void env_clear_common(u32 index, const struct env_map_common *map)
{
map[index].val->val = 0;
map[index].val->set = false;
}
static int env_read_common(u32 index, const struct env_map_common *map)
{
u32 val;
if (!env_get_yesno(map[index].env_name)) {
if (map[index].type == ENV_HEX) {
val = (u32)env_get_hex(map[index].env_name, 0);
debug("ENV: %s: = %#x\n", map[index].env_name, val);
} else {
val = (u32)env_get_ulong(map[index].env_name, 10, 0);
debug("ENV: %s: = %d\n", map[index].env_name, val);
}
map[index].val->val = val;
map[index].val->set = true;
}
return 0;
}
static void env_clear_core(u32 index, const struct env_map_percpu *map)
{
for (u32 i = 0; i < NR_CPUS; i++) {
(*map[index].val)[i].val = 0;
(*map[index].val)[i].set = false;
}
}
static int env_read_core(u32 index, const struct env_map_percpu *map)
{
u32 val;
char command[MAX_CMD_LEN];
for (u32 i = 0; i < NR_CPUS; i++) {
sprintf(command, "%s_%u", map[index].env_name, i);
if (!env_get_yesno(command)) {
if (map[index].type == ENV_HEX) {
val = (u32)env_get_hex(command, 0);
debug("ENV: %s: = %#x\n", command, val);
} else {
val = (u32)env_get_ulong(command, 10, 0);
debug("ENV: %s: = %d\n", command, val);
}
(*map[index].val)[i].val = val;
(*map[index].val)[i].set = true;
}
}
return 0;
}
static int env_validate_common(u32 index, const struct env_map_common *map)
{
u32 value = map[index].val->val;
bool set = map[index].val->set;
u32 min = map[index].min;
u32 max = map[index].max;
/* Check if environment is mandatory */
if (map[index].mandatory && !set) {
pr_err("Variable \'%s\' is mandatory, but it is not defined\n",
map[index].env_name);
return -EINVAL;
}
/* Check environment boundary */
if (set && (value < min || value > max)) {
if (map[index].type == ENV_HEX)
pr_err("Variable \'%s\' must be between %#x and %#x\n",
map[index].env_name, min, max);
else
pr_err("Variable \'%s\' must be between %u and %u\n",
map[index].env_name, min, max);
return -EINVAL;
}
return 0;
}
static int env_validate_core(u32 index, const struct env_map_percpu *map,
bool (*cpu_used)(u32))
{
u32 value;
bool set;
bool mandatory = map[index].mandatory;
u32 min, max;
for (u32 i = 0; i < NR_CPUS; i++) {
set = (*map[index].val)[i].set;
value = (*map[index].val)[i].val;
/* Check if environment is mandatory */
if (cpu_used(i) && mandatory && !set) {
pr_err("CPU %u is used, but \'%s_%u\' is not defined\n",
i, map[index].env_name, i);
return -EINVAL;
}
min = map[index].min[i];
max = map[index].max[i];
/* Check environment boundary */
if (set && (value < min || value > max)) {
if (map[index].type == ENV_HEX)
pr_err("Variable \'%s_%u\' must be between %#x and %#x\n",
map[index].env_name, i, min, max);
else
pr_err("Variable \'%s_%u\' must be between %d and %d\n",
map[index].env_name, i, min, max);
return -EINVAL;
}
}
return 0;
}
void envs_cleanup_core(const struct env_map_percpu *map)
{
/* Cleanup env struct first */
for (u32 i = 0; map[i].env_name; i++)
env_clear_core(i, map);
}
void envs_cleanup_common(const struct env_map_common *map)
{
/* Cleanup env struct first */
for (u32 i = 0; map[i].env_name; i++)
env_clear_common(i, map);
}
int envs_read_common(const struct env_map_common *map)
{
int ret;
for (u32 i = 0; map[i].env_name; i++) {
ret = env_read_common(i, map);
if (ret)
return ret;
}
return 0;
}
int envs_validate_common(const struct env_map_common *map)
{
int ret;
for (u32 i = 0; map[i].env_name; i++) {
ret = env_validate_common(i, map);
if (ret)
return ret;
}
return 0;
}
int envs_read_validate_common(const struct env_map_common *map)
{
int ret;
envs_cleanup_common(map);
ret = envs_read_common(map);
if (ret)
return ret;
ret = envs_validate_common(map);
if (ret)
return ret;
return 0;
}
int envs_read_validate_core(const struct env_map_percpu *map,
bool (*cpu_used)(u32))
{
int ret;
envs_cleanup_core(map);
for (u32 i = 0; map[i].env_name; i++) {
ret = env_read_core(i, map);
if (ret)
return ret;
}
for (u32 i = 0; map[i].env_name; i++) {
ret = env_validate_core(i, map, cpu_used);
if (ret)
return ret;
}
return 0;
}
int envs_process_and_validate(const struct env_map_common *common,
const struct env_map_percpu *core,
bool (*cpu_used)(u32))
{
int ret;
ret = envs_read_validate_common(common);
if (ret)
return ret;
ret = envs_read_validate_core(core, cpu_used);
if (ret)
return ret;
return 0;
}
static int args_envs_read_search(const struct env_map_common *map,
int argc, char *const argv[])
{
for (int i = 0; map[i].env_name; i++) {
if (!strcmp(argv[0], map[i].env_name))
return i;
}
pr_err("Unexpected argument '%s', can't parse\n", argv[0]);
return -ENOENT;
}
static int arg_read_set(const struct env_map_common *map, u32 i, int argc,
char *const argv[])
{
char *endp = argv[1];
if (map[i].type == ENV_HEX)
map[i].val->val = simple_strtoul(argv[1], &endp, 16);
else
map[i].val->val = simple_strtoul(argv[1], &endp, 10);
map[i].val->set = true;
if (*endp == '\0')
return 0;
pr_err("Unexpected argument '%s', can't parse\n", argv[1]);
map[i].val->set = false;
return -EINVAL;
}
int args_envs_enumerate(const struct env_map_common *map, int enum_by,
int argc, char *const argv[])
{
u32 i;
if (argc % enum_by) {
pr_err("unexpected argument number: %d\n", argc);
return -EINVAL;
}
while (argc > 0) {
i = args_envs_read_search(map, argc, argv);
if (i < 0)
return i;
debug("ARG: found '%s' with index %d\n", map[i].env_name, i);
if (i < 0) {
pr_err("unknown arg: %s\n", argv[0]);
return -EINVAL;
}
if (arg_read_set(map, i, argc, argv))
return -EINVAL;
debug("ARG: value.s '%s' == %#x\n", argv[1], map[i].val->val);
argc -= enum_by;
argv += enum_by;
}
return 0;
}