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- // 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 = hextoul(argv[1], &endp);
- else
- map[i].val->val = dectoul(argv[1], &endp);
- 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;
- }
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