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6
7#include <common.h>
8#include <command.h>
9#include <errno.h>
10#include <qfw.h>
11
12
13
14
15
16
17static int qemu_fwcfg_setup_kernel(void *load_addr, void *initrd_addr)
18{
19 char *data_addr;
20 uint32_t setup_size, kernel_size, cmdline_size, initrd_size;
21
22 qemu_fwcfg_read_entry(FW_CFG_SETUP_SIZE, 4, &setup_size);
23 qemu_fwcfg_read_entry(FW_CFG_KERNEL_SIZE, 4, &kernel_size);
24
25 if (setup_size == 0 || kernel_size == 0) {
26 printf("warning: no kernel available\n");
27 return -1;
28 }
29
30 data_addr = load_addr;
31 qemu_fwcfg_read_entry(FW_CFG_SETUP_DATA,
32 le32_to_cpu(setup_size), data_addr);
33 data_addr += le32_to_cpu(setup_size);
34
35 qemu_fwcfg_read_entry(FW_CFG_KERNEL_DATA,
36 le32_to_cpu(kernel_size), data_addr);
37 data_addr += le32_to_cpu(kernel_size);
38
39 data_addr = initrd_addr;
40 qemu_fwcfg_read_entry(FW_CFG_INITRD_SIZE, 4, &initrd_size);
41 if (initrd_size == 0) {
42 printf("warning: no initrd available\n");
43 } else {
44 qemu_fwcfg_read_entry(FW_CFG_INITRD_DATA,
45 le32_to_cpu(initrd_size), data_addr);
46 data_addr += le32_to_cpu(initrd_size);
47 }
48
49 qemu_fwcfg_read_entry(FW_CFG_CMDLINE_SIZE, 4, &cmdline_size);
50 if (cmdline_size) {
51 qemu_fwcfg_read_entry(FW_CFG_CMDLINE_DATA,
52 le32_to_cpu(cmdline_size), data_addr);
53
54
55
56
57 if (*data_addr != '\0') {
58 if (env_set("bootargs", data_addr) < 0)
59 printf("warning: unable to change bootargs\n");
60 }
61 }
62
63 printf("loading kernel to address %p size %x", load_addr,
64 le32_to_cpu(kernel_size));
65 if (initrd_size)
66 printf(" initrd %p size %x\n",
67 initrd_addr,
68 le32_to_cpu(initrd_size));
69 else
70 printf("\n");
71
72 return 0;
73}
74
75static int qemu_fwcfg_list_firmware(void)
76{
77 int ret;
78 struct fw_cfg_file_iter iter;
79 struct fw_file *file;
80
81
82 ret = qemu_fwcfg_read_firmware_list();
83 if (ret)
84 return ret;
85
86
87 for (file = qemu_fwcfg_file_iter_init(&iter);
88 !qemu_fwcfg_file_iter_end(&iter);
89 file = qemu_fwcfg_file_iter_next(&iter)) {
90 printf("%-56s\n", file->cfg.name);
91 }
92
93 return 0;
94}
95
96static int qemu_fwcfg_do_list(cmd_tbl_t *cmdtp, int flag,
97 int argc, char * const argv[])
98{
99 if (qemu_fwcfg_list_firmware() < 0)
100 return CMD_RET_FAILURE;
101
102 return 0;
103}
104
105static int qemu_fwcfg_do_cpus(cmd_tbl_t *cmdtp, int flag,
106 int argc, char * const argv[])
107{
108 int ret = qemu_fwcfg_online_cpus();
109 if (ret < 0) {
110 printf("QEMU fw_cfg interface not found\n");
111 return CMD_RET_FAILURE;
112 }
113
114 printf("%d cpu(s) online\n", qemu_fwcfg_online_cpus());
115
116 return 0;
117}
118
119static int qemu_fwcfg_do_load(cmd_tbl_t *cmdtp, int flag,
120 int argc, char * const argv[])
121{
122 char *env;
123 void *load_addr;
124 void *initrd_addr;
125
126 env = env_get("loadaddr");
127 load_addr = env ?
128 (void *)simple_strtoul(env, NULL, 16) :
129#ifdef CONFIG_LOADADDR
130 (void *)CONFIG_LOADADDR;
131#else
132 NULL;
133#endif
134
135 env = env_get("ramdiskaddr");
136 initrd_addr = env ?
137 (void *)simple_strtoul(env, NULL, 16) :
138#ifdef CONFIG_RAMDISK_ADDR
139 (void *)CONFIG_RAMDISK_ADDR;
140#else
141 NULL;
142#endif
143
144 if (argc == 2) {
145 load_addr = (void *)simple_strtoul(argv[0], NULL, 16);
146 initrd_addr = (void *)simple_strtoul(argv[1], NULL, 16);
147 } else if (argc == 1) {
148 load_addr = (void *)simple_strtoul(argv[0], NULL, 16);
149 }
150
151 if (!load_addr || !initrd_addr) {
152 printf("missing load or initrd address\n");
153 return CMD_RET_FAILURE;
154 }
155
156 return qemu_fwcfg_setup_kernel(load_addr, initrd_addr);
157}
158
159static cmd_tbl_t fwcfg_commands[] = {
160 U_BOOT_CMD_MKENT(list, 0, 1, qemu_fwcfg_do_list, "", ""),
161 U_BOOT_CMD_MKENT(cpus, 0, 1, qemu_fwcfg_do_cpus, "", ""),
162 U_BOOT_CMD_MKENT(load, 2, 1, qemu_fwcfg_do_load, "", ""),
163};
164
165static int do_qemu_fw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
166{
167 int ret;
168 cmd_tbl_t *fwcfg_cmd;
169
170 if (!qemu_fwcfg_present()) {
171 printf("QEMU fw_cfg interface not found\n");
172 return CMD_RET_USAGE;
173 }
174
175 fwcfg_cmd = find_cmd_tbl(argv[1], fwcfg_commands,
176 ARRAY_SIZE(fwcfg_commands));
177 argc -= 2;
178 argv += 2;
179 if (!fwcfg_cmd || argc > fwcfg_cmd->maxargs)
180 return CMD_RET_USAGE;
181
182 ret = fwcfg_cmd->cmd(fwcfg_cmd, flag, argc, argv);
183
184 return cmd_process_error(fwcfg_cmd, ret);
185}
186
187U_BOOT_CMD(
188 qfw, 4, 1, do_qemu_fw,
189 "QEMU firmware interface",
190 "<command>\n"
191 " - list : print firmware(s) currently loaded\n"
192 " - cpus : print online cpu number\n"
193 " - load <kernel addr> <initrd addr> : load kernel and initrd (if any), and setup for zboot\n"
194)
195
