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50fc929386
Add the script name as a prefix to fw_addr and fw_size variables to make sure they are always unique and won't easily conflict with user variables. Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2025 Lucien Jheng <lucienzx159@gmail.com>
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*/
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#include <command.h>
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#include <env.h>
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#include <errno.h>
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#include <linux/types.h>
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#include <log.h>
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int request_firmware_into_buf_via_script(void *buf, size_t max_size,
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const char *script_name,
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size_t *retsize)
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{
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char env_addr[CONFIG_SYS_CBSIZE] = { 0 };
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char env_size[CONFIG_SYS_CBSIZE] = { 0 };
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char *args[2] = { "run", (char *)script_name };
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int ret, repeatable;
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ulong addr, size;
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if (!buf || !script_name || !max_size)
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return -EINVAL;
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/* Run the firmware loading script */
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ret = cmd_process(0, 2, args, &repeatable, NULL);
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if (ret) {
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log_err("Firmware loading script '%s' not defined or failed.\n",
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script_name);
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return -EINVAL;
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}
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/* Prefix the FW loader variables with the script prefix */
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snprintf(env_addr, sizeof(env_addr), "%s_addr", script_name);
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snprintf(env_size, sizeof(env_size), "%s_size", script_name);
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/* Find out where the firmware got loaded and how long it is */
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addr = env_get_hex(env_addr, 0);
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size = env_get_hex(env_size, 0);
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/* Clear the variables set by the firmware loading script */
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env_set(env_addr, NULL);
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env_set(env_size, NULL);
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if (!addr || !size) {
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log_err("Firmware address (0x%lx) or size (0x%lx) are invalid.\n",
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addr, size);
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return -EINVAL;
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}
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if (size > max_size) {
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log_err("Loaded firmware size 0x%lx exceeded maximum allowed size 0x%zx.\n",
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size, max_size);
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return -E2BIG;
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}
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if (retsize)
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*retsize = size;
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memcpy(buf, (void *)addr, size);
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return 0;
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}
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