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 20static 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 32static 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 55static 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 61static 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 75static 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 84static 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 91static const struct udevice_id qfw_bootmeth_ids[] = { 92 { .compatible = "u-boot,qfw-extlinux" }, 93 { } 94}; 95 96U_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}; 103