]>
git.ipfire.org Git - thirdparty/u-boot.git/blob - cmd/qfw.c
1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
12 * This function prepares kernel for zboot. It loads kernel data
13 * to 'load_addr', initrd to 'initrd_addr' and kernel command
14 * line using qemu fw_cfg interface.
16 static int qemu_fwcfg_setup_kernel(void *load_addr
, void *initrd_addr
)
19 uint32_t setup_size
, kernel_size
, cmdline_size
, initrd_size
;
21 qemu_fwcfg_read_entry(FW_CFG_SETUP_SIZE
, 4, &setup_size
);
22 qemu_fwcfg_read_entry(FW_CFG_KERNEL_SIZE
, 4, &kernel_size
);
24 if (setup_size
== 0 || kernel_size
== 0) {
25 printf("warning: no kernel available\n");
29 data_addr
= load_addr
;
30 qemu_fwcfg_read_entry(FW_CFG_SETUP_DATA
,
31 le32_to_cpu(setup_size
), data_addr
);
32 data_addr
+= le32_to_cpu(setup_size
);
34 qemu_fwcfg_read_entry(FW_CFG_KERNEL_DATA
,
35 le32_to_cpu(kernel_size
), data_addr
);
36 data_addr
+= le32_to_cpu(kernel_size
);
38 data_addr
= initrd_addr
;
39 qemu_fwcfg_read_entry(FW_CFG_INITRD_SIZE
, 4, &initrd_size
);
40 if (initrd_size
== 0) {
41 printf("warning: no initrd available\n");
43 qemu_fwcfg_read_entry(FW_CFG_INITRD_DATA
,
44 le32_to_cpu(initrd_size
), data_addr
);
45 data_addr
+= le32_to_cpu(initrd_size
);
48 qemu_fwcfg_read_entry(FW_CFG_CMDLINE_SIZE
, 4, &cmdline_size
);
50 qemu_fwcfg_read_entry(FW_CFG_CMDLINE_DATA
,
51 le32_to_cpu(cmdline_size
), data_addr
);
53 * if kernel cmdline only contains '\0', (e.g. no -append
54 * when invoking qemu), do not update bootargs
56 if (*data_addr
!= '\0') {
57 if (env_set("bootargs", data_addr
) < 0)
58 printf("warning: unable to change bootargs\n");
62 printf("loading kernel to address %p size %x", load_addr
,
63 le32_to_cpu(kernel_size
));
65 printf(" initrd %p size %x\n",
67 le32_to_cpu(initrd_size
));
74 static int qemu_fwcfg_list_firmware(void)
77 struct fw_cfg_file_iter iter
;
80 /* make sure fw_list is loaded */
81 ret
= qemu_fwcfg_read_firmware_list();
86 for (file
= qemu_fwcfg_file_iter_init(&iter
);
87 !qemu_fwcfg_file_iter_end(&iter
);
88 file
= qemu_fwcfg_file_iter_next(&iter
)) {
89 printf("%-56s\n", file
->cfg
.name
);
95 static int qemu_fwcfg_do_list(cmd_tbl_t
*cmdtp
, int flag
,
96 int argc
, char * const argv
[])
98 if (qemu_fwcfg_list_firmware() < 0)
99 return CMD_RET_FAILURE
;
104 static int qemu_fwcfg_do_cpus(cmd_tbl_t
*cmdtp
, int flag
,
105 int argc
, char * const argv
[])
107 int ret
= qemu_fwcfg_online_cpus();
109 printf("QEMU fw_cfg interface not found\n");
110 return CMD_RET_FAILURE
;
113 printf("%d cpu(s) online\n", qemu_fwcfg_online_cpus());
118 static int qemu_fwcfg_do_load(cmd_tbl_t
*cmdtp
, int flag
,
119 int argc
, char * const argv
[])
125 env
= env_get("loadaddr");
127 (void *)simple_strtoul(env
, NULL
, 16) :
128 #ifdef CONFIG_LOADADDR
129 (void *)CONFIG_LOADADDR
;
134 env
= env_get("ramdiskaddr");
136 (void *)simple_strtoul(env
, NULL
, 16) :
137 #ifdef CONFIG_RAMDISK_ADDR
138 (void *)CONFIG_RAMDISK_ADDR
;
144 load_addr
= (void *)simple_strtoul(argv
[0], NULL
, 16);
145 initrd_addr
= (void *)simple_strtoul(argv
[1], NULL
, 16);
146 } else if (argc
== 1) {
147 load_addr
= (void *)simple_strtoul(argv
[0], NULL
, 16);
150 if (!load_addr
|| !initrd_addr
) {
151 printf("missing load or initrd address\n");
152 return CMD_RET_FAILURE
;
155 return qemu_fwcfg_setup_kernel(load_addr
, initrd_addr
);
158 static cmd_tbl_t fwcfg_commands
[] = {
159 U_BOOT_CMD_MKENT(list
, 0, 1, qemu_fwcfg_do_list
, "", ""),
160 U_BOOT_CMD_MKENT(cpus
, 0, 1, qemu_fwcfg_do_cpus
, "", ""),
161 U_BOOT_CMD_MKENT(load
, 2, 1, qemu_fwcfg_do_load
, "", ""),
164 static int do_qemu_fw(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
167 cmd_tbl_t
*fwcfg_cmd
;
169 if (!qemu_fwcfg_present()) {
170 printf("QEMU fw_cfg interface not found\n");
171 return CMD_RET_USAGE
;
174 fwcfg_cmd
= find_cmd_tbl(argv
[1], fwcfg_commands
,
175 ARRAY_SIZE(fwcfg_commands
));
178 if (!fwcfg_cmd
|| argc
> fwcfg_cmd
->maxargs
)
179 return CMD_RET_USAGE
;
181 ret
= fwcfg_cmd
->cmd(fwcfg_cmd
, flag
, argc
, argv
);
183 return cmd_process_error(fwcfg_cmd
, ret
);
187 qfw
, 4, 1, do_qemu_fw
,
188 "QEMU firmware interface",
190 " - list : print firmware(s) currently loaded\n"
191 " - cpus : print online cpu number\n"
192 " - load <kernel addr> <initrd addr> : load kernel and initrd (if any), and setup for zboot\n"