cmd/qfw.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2015 Miao Yan <yanmiaobest@gmail.com>
   4  */
   5
   6 #include <common.h>
   7 #include <command.h>
   8 #include <env.h>
   9 #include <errno.h>
  10 #include <qfw.h>
  11 #include <dm.h>
  12
  13 static struct udevice *qfw_dev;
  14
  15 /*
  16  * This function prepares kernel for zboot. It loads kernel data
  17  * to 'load_addr', initrd to 'initrd_addr' and kernel command
  18  * line using qemu fw_cfg interface.
  19  */
  20 static int qemu_fwcfg_cmd_setup_kernel(void *load_addr, void *initrd_addr)
  21 {
  22         char *data_addr;
  23         uint32_t setup_size, kernel_size, cmdline_size, initrd_size;
  24
  25         qfw_read_entry(qfw_dev, FW_CFG_SETUP_SIZE, 4, &setup_size);
  26         qfw_read_entry(qfw_dev, FW_CFG_KERNEL_SIZE, 4, &kernel_size);
  27
  28         if (kernel_size == 0) {
  29                 printf("warning: no kernel available\n");
  30                 return -1;
  31         }
  32
  33         data_addr = load_addr;
  34         if (setup_size != 0) {
  35                 qfw_read_entry(qfw_dev, FW_CFG_SETUP_DATA,
  36                                le32_to_cpu(setup_size), data_addr);
  37                 data_addr += le32_to_cpu(setup_size);
  38         }
  39
  40         qfw_read_entry(qfw_dev, FW_CFG_KERNEL_DATA,
  41                        le32_to_cpu(kernel_size), data_addr);
  42         data_addr += le32_to_cpu(kernel_size);
  43
  44         data_addr = initrd_addr;
  45         qfw_read_entry(qfw_dev, FW_CFG_INITRD_SIZE, 4, &initrd_size);
  46         if (initrd_size == 0) {
  47                 printf("warning: no initrd available\n");
  48         } else {
  49                 qfw_read_entry(qfw_dev, FW_CFG_INITRD_DATA,
  50                                le32_to_cpu(initrd_size), data_addr);
  51                 data_addr += le32_to_cpu(initrd_size);
  52         }
  53
  54         qfw_read_entry(qfw_dev, FW_CFG_CMDLINE_SIZE, 4, &cmdline_size);
  55         if (cmdline_size) {
  56                 qfw_read_entry(qfw_dev, FW_CFG_CMDLINE_DATA,
  57                                le32_to_cpu(cmdline_size), data_addr);
  58                 /*
  59                  * if kernel cmdline only contains '\0', (e.g. no -append
  60                  * when invoking qemu), do not update bootargs
  61                  */
  62                 if (*data_addr != '\0') {
  63                         if (env_set("bootargs", data_addr) < 0)
  64                                 printf("warning: unable to change bootargs\n");
  65                 }
  66         }
  67
  68         printf("loading kernel to address %p size %x", load_addr,
  69                le32_to_cpu(kernel_size));
  70         if (initrd_size)
  71                 printf(" initrd %p size %x\n",
  72                        initrd_addr,
  73                        le32_to_cpu(initrd_size));
  74         else
  75                 printf("\n");
  76
  77         return 0;
  78 }
  79
  80 static int qemu_fwcfg_cmd_list_firmware(void)
  81 {
  82         int ret;
  83         struct fw_cfg_file_iter iter;
  84         struct fw_file *file;
  85
  86         /* make sure fw_list is loaded */
  87         ret = qfw_read_firmware_list(qfw_dev);
  88         if (ret)
  89                 return ret;
  90
  91         for (file = qfw_file_iter_init(qfw_dev, &iter);
  92              !qfw_file_iter_end(&iter);
  93              file = qfw_file_iter_next(&iter)) {
  94                 printf("%-56s\n", file->cfg.name);
  95         }
  96
  97         return 0;
  98 }
  99
 100 static int qemu_fwcfg_do_list(struct cmd_tbl *cmdtp, int flag,
 101                               int argc, char *const argv[])
 102 {
 103         if (qemu_fwcfg_cmd_list_firmware() < 0)
 104                 return CMD_RET_FAILURE;
 105
 106         return 0;
 107 }
 108
 109 static int qemu_fwcfg_do_cpus(struct cmd_tbl *cmdtp, int flag,
 110                               int argc, char *const argv[])
 111 {
 112         printf("%d cpu(s) online\n", qfw_online_cpus(qfw_dev));
 113         return 0;
 114 }
 115
 116 static int qemu_fwcfg_do_load(struct cmd_tbl *cmdtp, int flag,
 117                               int argc, char *const argv[])
 118 {
 119         char *env;
 120         void *load_addr;
 121         void *initrd_addr;
 122
 123         env = env_get("loadaddr");
 124         load_addr = env ?
 125                 (void *)hextoul(env, NULL) :
 126                 (void *)CONFIG_SYS_LOAD_ADDR;
 127
 128         env = env_get("ramdiskaddr");
 129         initrd_addr = env ?
 130                 (void *)hextoul(env, NULL) :
 131 #ifdef CONFIG_RAMDISK_ADDR
 132                 (void *)CONFIG_RAMDISK_ADDR;
 133 #else
 134                 NULL;
 135 #endif
 136
 137         if (argc == 2) {
 138                 load_addr = (void *)hextoul(argv[0], NULL);
 139                 initrd_addr = (void *)hextoul(argv[1], NULL);
 140         } else if (argc == 1) {
 141                 load_addr = (void *)hextoul(argv[0], NULL);
 142         }
 143
 144         if (!load_addr || !initrd_addr) {
 145                 printf("missing load or initrd address\n");
 146                 return CMD_RET_FAILURE;
 147         }
 148
 149         return qemu_fwcfg_cmd_setup_kernel(load_addr, initrd_addr);
 150 }
 151
 152 static struct cmd_tbl fwcfg_commands[] = {
 153         U_BOOT_CMD_MKENT(list, 0, 1, qemu_fwcfg_do_list, "", ""),
 154         U_BOOT_CMD_MKENT(cpus, 0, 1, qemu_fwcfg_do_cpus, "", ""),
 155         U_BOOT_CMD_MKENT(load, 2, 1, qemu_fwcfg_do_load, "", ""),
 156 };
 157
 158 static int do_qemu_fw(struct cmd_tbl *cmdtp, int flag, int argc,
 159                       char *const argv[])
 160 {
 161         int ret;
 162         struct cmd_tbl *fwcfg_cmd;
 163
 164         ret = qfw_get_dev(&qfw_dev);
 165         if (ret) {
 166                 printf("QEMU fw_cfg interface not found\n");
 167                 return CMD_RET_USAGE;
 168         }
 169
 170         fwcfg_cmd = find_cmd_tbl(argv[1], fwcfg_commands,
 171                                  ARRAY_SIZE(fwcfg_commands));
 172         argc -= 2;
 173         argv += 2;
 174         if (!fwcfg_cmd || argc > fwcfg_cmd->maxargs)
 175                 return CMD_RET_USAGE;
 176
 177         ret = fwcfg_cmd->cmd(fwcfg_cmd, flag, argc, argv);
 178
 179         return cmd_process_error(fwcfg_cmd, ret);
 180 }
 181
 182 U_BOOT_CMD(
 183         qfw,    4,      1,      do_qemu_fw,
 184         "QEMU firmware interface",
 185         "<command>\n"
 186         "    - list                             : print firmware(s) currently loaded\n"
 187         "    - cpus                             : print online cpu number\n"
 188         "    - load <kernel addr> <initrd addr> : load kernel and initrd (if any), and setup for zboot\n"
 189 )