mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-19 01:33:10 +00:00
8cfac237b9
To quote the author:
The bootflow feature provide a built-in way for U-Boot to automatically
boot an Operating System without custom scripting and other customisation.
This is called 'standard boot' since it provides a standard way for
U-Boot to boot a distro, without scripting.
It introduces the following concepts:
- bootdev - a device which can hold a distro
- bootmeth - a method to scan a bootdev to find bootflows (owned by
U-Boot)
- bootflow - a description of how to boot (owned by the distro)
This series provides an implementation of these, enabled to scan for
bootflows from MMC, USB and Ethernet. It supports the existing distro
boot as well as the EFI loader flow (bootefi/bootmgr). It works
similiarly to the existing script-based approach, but is native to
U-Boot.
With this we can boot on a Raspberry Pi 3 with just one command:
bootflow scan -lb
which means to scan, listing (-l) each bootflow and trying to boot each
one (-b). The final patch shows this.
With a standard way to identify boot devices, booting become easier. It
also should be possible to support U-Boot scripts, for backwards
compatibility only.
...
The design is described in these two documents:
https://drive.google.com/file/d/1ggW0KJpUOR__vBkj3l61L2dav4ZkNC12/view?usp=sharing
https://drive.google.com/file/d/1kTrflO9vvGlKp-ZH_jlgb9TY3WYG6FF9/view?usp=sharing
146 lines
5.8 KiB
C
146 lines
5.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*/
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#ifndef _DM_UCLASS_ID_H
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#define _DM_UCLASS_ID_H
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/* TODO(sjg@chromium.org): this could be compile-time generated */
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enum uclass_id {
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/* These are used internally by driver model */
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UCLASS_ROOT = 0,
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UCLASS_DEMO,
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UCLASS_TEST,
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UCLASS_TEST_FDT,
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UCLASS_TEST_FDT_MANUAL,
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UCLASS_TEST_BUS,
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UCLASS_TEST_PROBE,
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UCLASS_TEST_DUMMY,
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UCLASS_TEST_DEVRES,
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UCLASS_TEST_ACPI,
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UCLASS_SPI_EMUL, /* sandbox SPI device emulator */
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UCLASS_I2C_EMUL, /* sandbox I2C device emulator */
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UCLASS_I2C_EMUL_PARENT, /* parent for I2C device emulators */
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UCLASS_PCI_EMUL, /* sandbox PCI device emulator */
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UCLASS_PCI_EMUL_PARENT, /* parent for PCI device emulators */
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UCLASS_USB_EMUL, /* sandbox USB bus device emulator */
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UCLASS_AXI_EMUL, /* sandbox AXI bus device emulator */
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/* U-Boot uclasses start here - in alphabetical order */
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UCLASS_ACPI_PMC, /* (x86) Power-management controller (PMC) */
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UCLASS_ADC, /* Analog-to-digital converter */
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UCLASS_AHCI, /* SATA disk controller */
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UCLASS_AUDIO_CODEC, /* Audio codec with control and data path */
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UCLASS_AXI, /* AXI bus */
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UCLASS_BLK, /* Block device */
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UCLASS_BOOTCOUNT, /* Bootcount backing store */
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UCLASS_BOOTDEV, /* Boot device for locating an OS to boot */
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UCLASS_BOOTMETH, /* Bootmethod for booting an OS */
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UCLASS_BOOTSTD, /* Standard boot driver */
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UCLASS_BUTTON, /* Button */
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UCLASS_CACHE, /* Cache controller */
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UCLASS_CLK, /* Clock source, e.g. used by peripherals */
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UCLASS_CPU, /* CPU, typically part of an SoC */
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UCLASS_CROS_EC, /* Chrome OS EC */
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UCLASS_DISPLAY, /* Display (e.g. DisplayPort, HDMI) */
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UCLASS_DSI_HOST, /* Display Serial Interface host */
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UCLASS_DMA, /* Direct Memory Access */
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UCLASS_DSA, /* Distributed (Ethernet) Switch Architecture */
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UCLASS_ECDSA, /* Elliptic curve cryptographic device */
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UCLASS_EFI_LOADER, /* Devices created by UEFI applications */
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UCLASS_EFI_MEDIA, /* Devices provided by UEFI firmware */
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UCLASS_ETH, /* Ethernet device */
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UCLASS_ETH_PHY, /* Ethernet PHY device */
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UCLASS_FIRMWARE, /* Firmware */
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UCLASS_FS_FIRMWARE_LOADER, /* Generic loader */
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UCLASS_GPIO, /* Bank of general-purpose I/O pins */
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UCLASS_HASH, /* Hash device */
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UCLASS_HWSPINLOCK, /* Hardware semaphores */
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UCLASS_I2C, /* I2C bus */
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UCLASS_I2C_EEPROM, /* I2C EEPROM device */
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UCLASS_I2C_GENERIC, /* Generic I2C device */
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UCLASS_I2C_MUX, /* I2C multiplexer */
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UCLASS_I2S, /* I2S bus */
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UCLASS_IDE, /* IDE device */
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UCLASS_IOMMU, /* IOMMU */
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UCLASS_IRQ, /* Interrupt controller */
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UCLASS_KEYBOARD, /* Keyboard input device */
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UCLASS_LED, /* Light-emitting diode (LED) */
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UCLASS_LPC, /* x86 'low pin count' interface */
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UCLASS_MAILBOX, /* Mailbox controller */
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UCLASS_MASS_STORAGE, /* Mass storage device */
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UCLASS_MDIO, /* MDIO bus */
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UCLASS_MDIO_MUX, /* MDIO MUX/switch */
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UCLASS_MISC, /* Miscellaneous device */
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UCLASS_MMC, /* SD / MMC card or chip */
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UCLASS_MOD_EXP, /* RSA Mod Exp device */
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UCLASS_MTD, /* Memory Technology Device (MTD) device */
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UCLASS_MUX, /* Multiplexer device */
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UCLASS_NOP, /* No-op devices */
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UCLASS_NORTHBRIDGE, /* Intel Northbridge / SDRAM controller */
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UCLASS_NVME, /* NVM Express device */
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UCLASS_P2SB, /* (x86) Primary-to-Sideband Bus */
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UCLASS_PANEL, /* Display panel, such as an LCD */
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UCLASS_PANEL_BACKLIGHT, /* Backlight controller for panel */
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UCLASS_PARTITION, /* Logical disk partition device */
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UCLASS_PCH, /* x86 platform controller hub */
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UCLASS_PCI, /* PCI bus */
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UCLASS_PCI_EP, /* PCI endpoint device */
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UCLASS_PCI_GENERIC, /* Generic PCI bus device */
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UCLASS_PHY, /* Physical Layer (PHY) device */
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UCLASS_PINCONFIG, /* Pin configuration node device */
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UCLASS_PINCTRL, /* Pinctrl (pin muxing/configuration) device */
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UCLASS_PMIC, /* PMIC I/O device */
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UCLASS_POWER_DOMAIN, /* (SoC) Power domains */
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UCLASS_PWM, /* Pulse-width modulator */
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UCLASS_PWRSEQ, /* Power sequence device */
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UCLASS_QFW, /* QEMU firmware config device */
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UCLASS_RAM, /* RAM controller */
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UCLASS_REBOOT_MODE, /* Reboot mode */
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UCLASS_REGULATOR, /* Regulator device */
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UCLASS_REMOTEPROC, /* Remote Processor device */
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UCLASS_RESET, /* Reset controller device */
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UCLASS_RNG, /* Random Number Generator */
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UCLASS_RTC, /* Real time clock device */
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UCLASS_SCMI_AGENT, /* Interface with an SCMI server */
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UCLASS_SCSI, /* SCSI device */
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UCLASS_SERIAL, /* Serial UART */
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UCLASS_SIMPLE_BUS, /* Bus with child devices */
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UCLASS_SMEM, /* Shared memory interface */
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UCLASS_SOC, /* SOC Device */
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UCLASS_SOUND, /* Playing simple sounds */
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UCLASS_SPI, /* SPI bus */
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UCLASS_SPI_FLASH, /* SPI flash */
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UCLASS_SPI_GENERIC, /* Generic SPI flash target */
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UCLASS_SPMI, /* System Power Management Interface bus */
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UCLASS_SYSCON, /* System configuration device */
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UCLASS_SYSINFO, /* Device information from hardware */
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UCLASS_SYSRESET, /* System reset device */
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UCLASS_TEE, /* Trusted Execution Environment device */
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UCLASS_THERMAL, /* Thermal sensor */
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UCLASS_TIMER, /* Timer device */
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UCLASS_TPM, /* Trusted Platform Module TIS interface */
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UCLASS_UFS, /* Universal Flash Storage */
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UCLASS_USB, /* USB bus */
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UCLASS_USB_DEV_GENERIC, /* USB generic device */
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UCLASS_USB_HUB, /* USB hub */
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UCLASS_USB_GADGET_GENERIC, /* USB generic device */
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UCLASS_VIDEO, /* Video or LCD device */
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UCLASS_VIDEO_BRIDGE, /* Video bridge, e.g. DisplayPort to LVDS */
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UCLASS_VIDEO_CONSOLE, /* Text console driver for video device */
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UCLASS_VIDEO_OSD, /* On-screen display */
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UCLASS_VIRTIO, /* VirtIO transport device */
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UCLASS_W1, /* Dallas 1-Wire bus */
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UCLASS_W1_EEPROM, /* one-wire EEPROMs */
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UCLASS_WDT, /* Watchdog Timer driver */
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UCLASS_PVBLOCK, /* Xen virtual block device */
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UCLASS_COUNT,
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UCLASS_INVALID = -1,
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};
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#endif
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