boot/bootmeth_qfw.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Bootmethod for QEMU qfw
   4  *
   5  * Copyright 2023 Google LLC
   6  * Written by Simon Glass <sjg@chromium.org>
   7  */
   8
   9 #define LOG_CATEGORY UCLASS_BOOTSTD
  10
  11 #include <common.h>
  12 #include <command.h>
  13 #include <bootdev.h>
  14 #include <bootflow.h>
  15 #include <bootmeth.h>
  16 #include <env.h>
  17 #include <qfw.h>
  18 #include <dm.h>
  19
  20 static int qfw_check(struct udevice *dev, struct bootflow_iter *iter)
  21 {
  22         const struct udevice *media = dev_get_parent(iter->dev);
  23         enum uclass_id id = device_get_uclass_id(media);
  24
  25         log_debug("media=%s\n", media->name);
  26         if (id == UCLASS_QFW)
  27                 return 0;
  28
  29         return -ENOTSUPP;
  30 }
  31
  32 static int qfw_read_bootflow(struct udevice *dev, struct bootflow *bflow)
  33 {
  34         struct udevice *qfw_dev = dev_get_parent(bflow->dev);
  35         ulong load, initrd;
  36         int ret;
  37
  38         load = env_get_hex("kernel_addr_r", 0);
  39         initrd = env_get_hex("ramdisk_addr_r", 0);
  40         log_debug("setup kernel %s %lx %lx\n", qfw_dev->name, load, initrd);
  41         bflow->name = strdup("qfw");
  42         if (!bflow->name)
  43                 return log_msg_ret("name", -ENOMEM);
  44
  45         ret = qemu_fwcfg_setup_kernel(qfw_dev, load, initrd);
  46         log_debug("setup kernel result %d\n", ret);
  47         if (ret)
  48                 return log_msg_ret("cmd", -EIO);
  49
  50         bflow->state = BOOTFLOWST_READY;
  51
  52         return 0;
  53 }
  54
  55 static int qfw_read_file(struct udevice *dev, struct bootflow *bflow,
  56                          const char *file_path, ulong addr, ulong *sizep)
  57 {
  58         return -ENOSYS;
  59 }
  60
  61 static int qfw_boot(struct udevice *dev, struct bootflow *bflow)
  62 {
  63         int ret;
  64
  65         ret = run_command("booti ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdtcontroladdr}",
  66                           0);
  67         if (ret) {
  68                 ret = run_command("bootz ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} "
  69                                   "${fdtcontroladdr}", 0);
  70         }
  71
  72         return ret ? -EIO : 0;
  73 }
  74
  75 static int qfw_bootmeth_bind(struct udevice *dev)
  76 {
  77         struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
  78
  79         plat->desc = "QEMU boot using firmware interface";
  80
  81         return 0;
  82 }
  83
  84 static struct bootmeth_ops qfw_bootmeth_ops = {
  85         .check          = qfw_check,
  86         .read_bootflow  = qfw_read_bootflow,
  87         .read_file      = qfw_read_file,
  88         .boot           = qfw_boot,
  89 };
  90
  91 static const struct udevice_id qfw_bootmeth_ids[] = {
  92         { .compatible = "u-boot,qfw-extlinux" },
  93         { }
  94 };
  95
  96 U_BOOT_DRIVER(bootmeth_qfw) = {
  97         .name           = "bootmeth_qfw",
  98         .id             = UCLASS_BOOTMETH,
  99         .of_match       = qfw_bootmeth_ids,
 100         .ops            = &qfw_bootmeth_ops,
 101         .bind           = qfw_bootmeth_bind,
 102 };