mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-31 20:18:18 +00:00
d22a765755
On all Pis so far, the VC FW provides a short stub to set up the ARM CPU
before entering the kernel (a/k/a U-Boot for us). This feature is not
currently supported by the VC FW when booting in 64-bit mode. However,
this feature will likely appear in the near future, and this U-Boot port
assumes that such a feature is in place. Without that feature, or a
temporary workaround described below, U-Boot will not boot.
Once the VC FW does provide the ARM stub, u-boot.bin built for rpi_3 can
be used drectly as kernel7.img, in the same way as any other RPi port. The
following config.txt is required:
# Fix mini UART input frequency, and setup/enable up the UART.
# Without this option, U-Boot will not boot, even if you don't care
# about the serial console. This option will always be required for
# all RPi3 use-cases, unless the PL011 UART is used, which is not
# yet supported by rpi_3* builds of U-Boot.
enable_uart=1
# Boot in AArch64 (64-bit) mode.
# It is possible that a future VC FW will remove the need for this
# option, instead auto-setting 32-/64-bit mode based on the "kernel"
# filename present on the SD card.
arm_control=0x200
Prior to the VC FW providing the ARM boot stub, you can use the following
steps to build an equivalent stub into the U-Boot binary:
git clone https://github.com/swarren/rpi-3-aarch64-demo.git \
../rpi-3-aarch64-demo
(cd ../rpi-3-aarch64-demo && ./build.sh)
Build U-Boot for rpi_3 in the usual way
cat ../rpi-3-aarch64-demo/armstub64.bin u-boot.bin > u-boot.bin.stubbed
Use u-boot.bin.stubbed as kernel7.img on the Pi SD card.
In this case, the following additional entries are required in config.txt:
# Tell the FW to load the kernel image at address 0, the reset vector.
kernel_old=1
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
485 lines
10 KiB
C
485 lines
10 KiB
C
/*
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* (C) Copyright 2012-2016 Stephen Warren
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <inttypes.h>
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#include <config.h>
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#include <dm.h>
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#include <fdt_support.h>
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#include <fdt_simplefb.h>
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#include <lcd.h>
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#include <memalign.h>
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#include <mmc.h>
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#include <asm/gpio.h>
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#include <asm/arch/mbox.h>
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#include <asm/arch/sdhci.h>
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#include <asm/global_data.h>
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#include <dm/platform_data/serial_pl01x.h>
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#include <dm/platform_data/serial_bcm283x_mu.h>
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#ifdef CONFIG_ARM64
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#include <asm/armv8/mmu.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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static const struct bcm2835_gpio_platdata gpio_platdata = {
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.base = BCM2835_GPIO_BASE,
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};
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U_BOOT_DEVICE(bcm2835_gpios) = {
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.name = "gpio_bcm2835",
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.platdata = &gpio_platdata,
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};
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#ifdef CONFIG_PL01X_SERIAL
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static const struct pl01x_serial_platdata serial_platdata = {
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#ifndef CONFIG_BCM2835
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.base = 0x3f201000,
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#else
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.base = 0x20201000,
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#endif
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.type = TYPE_PL011,
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.skip_init = true,
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};
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U_BOOT_DEVICE(bcm2835_serials) = {
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.name = "serial_pl01x",
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.platdata = &serial_platdata,
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};
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#else
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static const struct bcm283x_mu_serial_platdata serial_platdata = {
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.base = 0x3f215040,
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.clock = 250000000,
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.skip_init = true,
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};
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U_BOOT_DEVICE(bcm2837_serials) = {
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.name = "serial_bcm283x_mu",
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.platdata = &serial_platdata,
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};
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#endif
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struct msg_get_arm_mem {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
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u32 end_tag;
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};
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struct msg_get_board_rev {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_get_board_rev get_board_rev;
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u32 end_tag;
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};
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struct msg_get_board_serial {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_get_board_serial get_board_serial;
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u32 end_tag;
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};
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struct msg_get_mac_address {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_get_mac_address get_mac_address;
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u32 end_tag;
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};
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struct msg_set_power_state {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_set_power_state set_power_state;
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u32 end_tag;
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};
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struct msg_get_clock_rate {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
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u32 end_tag;
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};
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/*
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* http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
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* http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
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* http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
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*
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* In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
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* ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
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* Foundation stated that the following source was accurate:
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* https://github.com/AndrewFromMelbourne/raspberry_pi_revision
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*/
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struct rpi_model {
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const char *name;
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const char *fdtfile;
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bool has_onboard_eth;
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};
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static const struct rpi_model rpi_model_unknown = {
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"Unknown model",
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"bcm283x-rpi-other.dtb",
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false,
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};
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static const struct rpi_model rpi_models_new_scheme[] = {
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[0x4] = {
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"2 Model B",
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"bcm2836-rpi-2-b.dtb",
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true,
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},
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[0x8] = {
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"3 Model B",
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"bcm2837-rpi-3-b.dtb",
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true,
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},
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[0x9] = {
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"Zero",
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"bcm2835-rpi-zero.dtb",
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false,
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},
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};
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static const struct rpi_model rpi_models_old_scheme[] = {
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[0x2] = {
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"Model B",
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"bcm2835-rpi-b.dtb",
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true,
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},
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[0x3] = {
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"Model B",
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"bcm2835-rpi-b.dtb",
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true,
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},
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[0x4] = {
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"Model B rev2",
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"bcm2835-rpi-b-rev2.dtb",
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true,
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},
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[0x5] = {
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"Model B rev2",
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"bcm2835-rpi-b-rev2.dtb",
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true,
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},
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[0x6] = {
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"Model B rev2",
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"bcm2835-rpi-b-rev2.dtb",
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true,
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},
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[0x7] = {
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"Model A",
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"bcm2835-rpi-a.dtb",
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false,
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},
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[0x8] = {
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"Model A",
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"bcm2835-rpi-a.dtb",
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false,
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},
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[0x9] = {
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"Model A",
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"bcm2835-rpi-a.dtb",
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false,
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},
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[0xd] = {
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"Model B rev2",
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"bcm2835-rpi-b-rev2.dtb",
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true,
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},
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[0xe] = {
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"Model B rev2",
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"bcm2835-rpi-b-rev2.dtb",
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true,
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},
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[0xf] = {
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"Model B rev2",
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"bcm2835-rpi-b-rev2.dtb",
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true,
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},
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[0x10] = {
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"Model B+",
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"bcm2835-rpi-b-plus.dtb",
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true,
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},
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[0x11] = {
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"Compute Module",
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"bcm2835-rpi-cm.dtb",
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false,
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},
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[0x12] = {
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"Model A+",
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"bcm2835-rpi-a-plus.dtb",
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false,
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},
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[0x13] = {
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"Model B+",
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"bcm2835-rpi-b-plus.dtb",
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true,
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},
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[0x14] = {
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"Compute Module",
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"bcm2835-rpi-cm.dtb",
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false,
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},
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[0x15] = {
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"Model A+",
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"bcm2835-rpi-a-plus.dtb",
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false,
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},
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};
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static uint32_t revision;
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static uint32_t rev_scheme;
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static uint32_t rev_type;
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static const struct rpi_model *model;
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#ifdef CONFIG_ARM64
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static struct mm_region bcm2837_mem_map[] = {
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{
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.base = 0x00000000UL,
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.size = 0x3f000000UL,
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.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
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PTE_BLOCK_INNER_SHARE
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}, {
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.base = 0x3f000000UL,
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.size = 0x01000000UL,
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.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
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PTE_BLOCK_NON_SHARE |
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PTE_BLOCK_PXN | PTE_BLOCK_UXN
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}, {
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/* List terminator */
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0,
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}
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};
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struct mm_region *mem_map = bcm2837_mem_map;
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#endif
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int dram_init(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
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int ret;
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BCM2835_MBOX_INIT_HDR(msg);
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BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
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if (ret) {
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printf("bcm2835: Could not query ARM memory size\n");
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return -1;
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}
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gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
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return 0;
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}
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static void set_fdtfile(void)
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{
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const char *fdtfile;
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if (getenv("fdtfile"))
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return;
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fdtfile = model->fdtfile;
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setenv("fdtfile", fdtfile);
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}
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static void set_usbethaddr(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
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int ret;
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if (!model->has_onboard_eth)
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return;
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if (getenv("usbethaddr"))
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return;
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BCM2835_MBOX_INIT_HDR(msg);
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BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
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if (ret) {
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printf("bcm2835: Could not query MAC address\n");
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/* Ignore error; not critical */
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return;
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}
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eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
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if (!getenv("ethaddr"))
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setenv("ethaddr", getenv("usbethaddr"));
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return;
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}
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#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
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static void set_board_info(void)
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{
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char s[11];
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snprintf(s, sizeof(s), "0x%X", revision);
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setenv("board_revision", s);
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snprintf(s, sizeof(s), "%d", rev_scheme);
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setenv("board_rev_scheme", s);
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/* Can't rename this to board_rev_type since it's an ABI for scripts */
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snprintf(s, sizeof(s), "0x%X", rev_type);
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setenv("board_rev", s);
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setenv("board_name", model->name);
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}
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#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
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static void set_serial_number(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
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int ret;
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char serial_string[17] = { 0 };
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if (getenv("serial#"))
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return;
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BCM2835_MBOX_INIT_HDR(msg);
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BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
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if (ret) {
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printf("bcm2835: Could not query board serial\n");
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/* Ignore error; not critical */
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return;
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}
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snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
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msg->get_board_serial.body.resp.serial);
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setenv("serial#", serial_string);
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}
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int misc_init_r(void)
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{
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set_fdtfile();
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set_usbethaddr();
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#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
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set_board_info();
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#endif
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set_serial_number();
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return 0;
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}
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static int power_on_module(u32 module)
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{
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
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int ret;
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BCM2835_MBOX_INIT_HDR(msg_pwr);
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BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
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SET_POWER_STATE);
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msg_pwr->set_power_state.body.req.device_id = module;
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msg_pwr->set_power_state.body.req.state =
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BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
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BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
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&msg_pwr->hdr);
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if (ret) {
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printf("bcm2835: Could not set module %u power state\n",
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module);
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return -1;
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}
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return 0;
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}
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static void get_board_rev(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
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int ret;
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const struct rpi_model *models;
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uint32_t models_count;
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BCM2835_MBOX_INIT_HDR(msg);
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BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
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if (ret) {
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printf("bcm2835: Could not query board revision\n");
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/* Ignore error; not critical */
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return;
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}
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/*
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* For details of old-vs-new scheme, see:
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* https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
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* http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
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* (a few posts down)
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*
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* For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
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* lower byte to use as the board rev:
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* http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
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* http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
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*/
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revision = msg->get_board_rev.body.resp.rev;
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if (revision & 0x800000) {
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rev_scheme = 1;
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rev_type = (revision >> 4) & 0xff;
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models = rpi_models_new_scheme;
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models_count = ARRAY_SIZE(rpi_models_new_scheme);
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} else {
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rev_scheme = 0;
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rev_type = revision & 0xff;
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models = rpi_models_old_scheme;
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models_count = ARRAY_SIZE(rpi_models_old_scheme);
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}
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if (rev_type >= models_count) {
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printf("RPI: Board rev 0x%x outside known range\n", rev_type);
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model = &rpi_model_unknown;
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} else if (!models[rev_type].name) {
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printf("RPI: Board rev 0x%x unknown\n", rev_type);
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model = &rpi_model_unknown;
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} else {
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model = &models[rev_type];
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}
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printf("RPI %s (0x%x)\n", model->name, revision);
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}
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int board_init(void)
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{
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get_board_rev();
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gd->bd->bi_boot_params = 0x100;
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return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
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}
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int board_mmc_init(bd_t *bis)
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{
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
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int ret;
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power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
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BCM2835_MBOX_INIT_HDR(msg_clk);
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BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
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msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
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if (ret) {
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printf("bcm2835: Could not query eMMC clock rate\n");
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return -1;
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}
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return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
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msg_clk->get_clock_rate.body.resp.rate_hz);
|
|
}
|
|
|
|
int ft_board_setup(void *blob, bd_t *bd)
|
|
{
|
|
/*
|
|
* For now, we simply always add the simplefb DT node. Later, we
|
|
* should be more intelligent, and e.g. only do this if no enabled DT
|
|
* node exists for the "real" graphics driver.
|
|
*/
|
|
lcd_dt_simplefb_add_node(blob);
|
|
|
|
return 0;
|
|
}
|