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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
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>
194 lines
4.7 KiB
C
194 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <errno.h>
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#include <qfw.h>
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/*
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* This function prepares kernel for zboot. It loads kernel data
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* to 'load_addr', initrd to 'initrd_addr' and kernel command
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* line using qemu fw_cfg interface.
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*/
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static int qemu_fwcfg_setup_kernel(void *load_addr, void *initrd_addr)
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{
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char *data_addr;
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uint32_t setup_size, kernel_size, cmdline_size, initrd_size;
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qemu_fwcfg_read_entry(FW_CFG_SETUP_SIZE, 4, &setup_size);
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qemu_fwcfg_read_entry(FW_CFG_KERNEL_SIZE, 4, &kernel_size);
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if (setup_size == 0 || kernel_size == 0) {
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printf("warning: no kernel available\n");
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return -1;
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}
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data_addr = load_addr;
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qemu_fwcfg_read_entry(FW_CFG_SETUP_DATA,
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le32_to_cpu(setup_size), data_addr);
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data_addr += le32_to_cpu(setup_size);
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qemu_fwcfg_read_entry(FW_CFG_KERNEL_DATA,
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le32_to_cpu(kernel_size), data_addr);
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data_addr += le32_to_cpu(kernel_size);
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data_addr = initrd_addr;
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qemu_fwcfg_read_entry(FW_CFG_INITRD_SIZE, 4, &initrd_size);
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if (initrd_size == 0) {
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printf("warning: no initrd available\n");
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} else {
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qemu_fwcfg_read_entry(FW_CFG_INITRD_DATA,
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le32_to_cpu(initrd_size), data_addr);
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data_addr += le32_to_cpu(initrd_size);
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}
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qemu_fwcfg_read_entry(FW_CFG_CMDLINE_SIZE, 4, &cmdline_size);
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if (cmdline_size) {
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qemu_fwcfg_read_entry(FW_CFG_CMDLINE_DATA,
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le32_to_cpu(cmdline_size), data_addr);
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/*
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* if kernel cmdline only contains '\0', (e.g. no -append
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* when invoking qemu), do not update bootargs
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*/
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if (*data_addr != '\0') {
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if (env_set("bootargs", data_addr) < 0)
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printf("warning: unable to change bootargs\n");
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}
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}
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printf("loading kernel to address %p size %x", load_addr,
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le32_to_cpu(kernel_size));
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if (initrd_size)
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printf(" initrd %p size %x\n",
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initrd_addr,
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le32_to_cpu(initrd_size));
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else
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printf("\n");
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return 0;
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}
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static int qemu_fwcfg_list_firmware(void)
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{
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int ret;
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struct fw_cfg_file_iter iter;
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struct fw_file *file;
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/* make sure fw_list is loaded */
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ret = qemu_fwcfg_read_firmware_list();
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if (ret)
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return ret;
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for (file = qemu_fwcfg_file_iter_init(&iter);
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!qemu_fwcfg_file_iter_end(&iter);
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file = qemu_fwcfg_file_iter_next(&iter)) {
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printf("%-56s\n", file->cfg.name);
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}
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return 0;
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}
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static int qemu_fwcfg_do_list(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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if (qemu_fwcfg_list_firmware() < 0)
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return CMD_RET_FAILURE;
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return 0;
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}
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static int qemu_fwcfg_do_cpus(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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int ret = qemu_fwcfg_online_cpus();
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if (ret < 0) {
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printf("QEMU fw_cfg interface not found\n");
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return CMD_RET_FAILURE;
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}
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printf("%d cpu(s) online\n", qemu_fwcfg_online_cpus());
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return 0;
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}
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static int qemu_fwcfg_do_load(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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char *env;
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void *load_addr;
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void *initrd_addr;
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env = env_get("loadaddr");
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load_addr = env ?
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(void *)simple_strtoul(env, NULL, 16) :
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#ifdef CONFIG_LOADADDR
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(void *)CONFIG_LOADADDR;
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#else
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NULL;
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#endif
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env = env_get("ramdiskaddr");
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initrd_addr = env ?
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(void *)simple_strtoul(env, NULL, 16) :
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#ifdef CONFIG_RAMDISK_ADDR
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(void *)CONFIG_RAMDISK_ADDR;
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#else
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NULL;
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#endif
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if (argc == 2) {
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load_addr = (void *)simple_strtoul(argv[0], NULL, 16);
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initrd_addr = (void *)simple_strtoul(argv[1], NULL, 16);
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} else if (argc == 1) {
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load_addr = (void *)simple_strtoul(argv[0], NULL, 16);
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}
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if (!load_addr || !initrd_addr) {
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printf("missing load or initrd address\n");
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return CMD_RET_FAILURE;
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}
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return qemu_fwcfg_setup_kernel(load_addr, initrd_addr);
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}
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static cmd_tbl_t fwcfg_commands[] = {
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U_BOOT_CMD_MKENT(list, 0, 1, qemu_fwcfg_do_list, "", ""),
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U_BOOT_CMD_MKENT(cpus, 0, 1, qemu_fwcfg_do_cpus, "", ""),
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U_BOOT_CMD_MKENT(load, 2, 1, qemu_fwcfg_do_load, "", ""),
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};
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static int do_qemu_fw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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int ret;
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cmd_tbl_t *fwcfg_cmd;
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if (!qemu_fwcfg_present()) {
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printf("QEMU fw_cfg interface not found\n");
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return CMD_RET_USAGE;
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}
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fwcfg_cmd = find_cmd_tbl(argv[1], fwcfg_commands,
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ARRAY_SIZE(fwcfg_commands));
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argc -= 2;
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argv += 2;
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if (!fwcfg_cmd || argc > fwcfg_cmd->maxargs)
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return CMD_RET_USAGE;
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ret = fwcfg_cmd->cmd(fwcfg_cmd, flag, argc, argv);
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return cmd_process_error(fwcfg_cmd, ret);
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}
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U_BOOT_CMD(
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qfw, 4, 1, do_qemu_fw,
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"QEMU firmware interface",
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"<command>\n"
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" - list : print firmware(s) currently loaded\n"
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" - cpus : print online cpu number\n"
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" - load <kernel addr> <initrd addr> : load kernel and initrd (if any), and setup for zboot\n"
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)
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