blob: 235f29565f9e1d3354ebb9c9b67aa8097fc58f8b [file] [log] [blame]
// 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"
#include <env.h>
#include <log.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;
}