// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2018 Synopsys, Inc. All rights reserved. * Author: Eugeniy Paltsev */ #include "env-lib.h" #include #include #include #include #include #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; }