Some boot methods don't act on a single bootdev but instead do their own thing. An example is EFI bootmgr which scan various devices using its own logic. Add a bootdev to handle this.
Signed-off-by: Simon Glass sjg@chromium.org ---
(no changes since v3)
Changes in v3: - Add a log category
boot/Makefile | 2 +- boot/bootstd-uclass.c | 6 ++++ boot/system_bootdev.c | 66 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 73 insertions(+), 1 deletion(-) create mode 100644 boot/system_bootdev.c
diff --git a/boot/Makefile b/boot/Makefile index c234543520..795665f7ce 100644 --- a/boot/Makefile +++ b/boot/Makefile @@ -23,7 +23,7 @@ obj-y += image.o image-board.o obj-$(CONFIG_ANDROID_AB) += android_ab.o obj-$(CONFIG_ANDROID_BOOT_IMAGE) += image-android.o image-android-dt.o
-obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootdev-uclass.o +obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootdev-uclass.o system_bootdev.o obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootflow.o obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootmeth-uclass.o obj-$(CONFIG_$(SPL_TPL_)BOOTSTD) += bootstd-uclass.o diff --git a/boot/bootstd-uclass.c b/boot/bootstd-uclass.c index 266bd7cb2e..3c6c32ae60 100644 --- a/boot/bootstd-uclass.c +++ b/boot/bootstd-uclass.c @@ -150,6 +150,12 @@ int dm_scan_other(bool pre_reloc_only) } }
+ /* Create the system bootdev too */ + ret = device_bind_driver(bootstd, "system_bootdev", "system-bootdev", + &dev); + if (ret) + return log_msg_ret("sys", ret); + return 0; }
diff --git a/boot/system_bootdev.c b/boot/system_bootdev.c new file mode 100644 index 0000000000..432d203478 --- /dev/null +++ b/boot/system_bootdev.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Bootdevice for system, used for bootmeths not tied to any partition device + * + * Copyright 2021 Google LLC + * Written by Simon Glass sjg@chromium.org + */ + +#define LOG_CATEGORY UCLASS_BOOTSTD + +#include <common.h> +#include <bootdev.h> +#include <bootflow.h> +#include <bootmeth.h> +#include <command.h> +#include <distro.h> +#include <dm.h> +#include <log.h> +#include <net.h> + +static int system_get_bootflow(struct udevice *dev, struct bootflow_iter *iter, + struct bootflow *bflow) +{ + int ret; + + /* Must be an bootstd device */ + ret = bootflow_iter_uses_system(iter); + if (ret) + return log_msg_ret("net", ret); + + ret = bootmeth_check(bflow->method, iter); + if (ret) + return log_msg_ret("check", ret); + + ret = bootmeth_read_bootflow(bflow->method, bflow); + if (ret) + return log_msg_ret("method", ret); + + return 0; +} + +static int system_bootdev_bind(struct udevice *dev) +{ + struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev); + + ucp->prio = BOOTDEVP_6_SYSTEM; + + return 0; +} + +struct bootdev_ops system_bootdev_ops = { + .get_bootflow = system_get_bootflow, +}; + +static const struct udevice_id system_bootdev_ids[] = { + { .compatible = "u-boot,bootdev-system" }, + { } +}; + +U_BOOT_DRIVER(system_bootdev) = { + .name = "system_bootdev", + .id = UCLASS_BOOTDEV, + .ops = &system_bootdev_ops, + .bind = system_bootdev_bind, + .of_match = system_bootdev_ids, +};