u-boot: drop backported patches
U-boot has been updated to 2017.01 in poky/oe-core which contains these patches. Signed-off-by: Mirza Krak <mirza.krak@gmail.com>
This commit is contained in:
Mirza Krak
committed by
Andrei Gherzan
Andrei Gherzan
parent
ae2be3aff9
commit
68634deeed
@ -1,56 +0,0 @@
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From 3e10fcde3f3c24a488866dd33fa3f5d46ff3d7a3 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?C=C3=A9dric=20Schieli?= <cschieli@gmail.com>
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Date: Fri, 11 Nov 2016 11:59:06 +0100
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Subject: [PATCH] arm: add save_boot_params for ARM1176
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Implement a hook to allow boards to save boot-time CPU state for later
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use. When U-Boot is chain-loaded by another bootloader, CPU registers may
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contain useful information such as system configuration information. This
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feature mirrors the equivalent ARMv7 feature.
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Signed-off-by: Cédric Schieli <cschieli@gmail.com>
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Acked-by: Stephen Warren <swarren@nvidia.com>
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Signed-off-by: Paul Barker <paul@paulbarker.me.uk>
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Upstream-status: Backport
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---
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arch/arm/cpu/arm1176/start.S | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
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index a602d4e..7c00201 100644
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--- a/arch/arm/cpu/arm1176/start.S
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+++ b/arch/arm/cpu/arm1176/start.S
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@@ -16,6 +16,7 @@
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#include <asm-offsets.h>
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#include <config.h>
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+#include <linux/linkage.h>
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#ifndef CONFIG_SYS_PHY_UBOOT_BASE
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#define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE
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@@ -37,6 +38,11 @@
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.globl reset
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reset:
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+ /* Allow the board to save important registers */
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+ b save_boot_params
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+.globl save_boot_params_ret
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+save_boot_params_ret:
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+
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/*
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* set the cpu to SVC32 mode
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*/
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@@ -110,3 +116,7 @@ mmu_disable_phys:
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c_runtime_cpu_setup:
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mov pc, lr
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+
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+WEAK(save_boot_params)
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+ b save_boot_params_ret /* back to my caller */
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+ENDPROC(save_boot_params)
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--
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2.1.4
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@ -1,156 +0,0 @@
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From ade243a211d62327e9ebadce27bbbff7981e37f0 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?C=C3=A9dric=20Schieli?= <cschieli@gmail.com>
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Date: Fri, 11 Nov 2016 11:59:07 +0100
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Subject: [PATCH] rpi: passthrough of the firmware provided FDT blob
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Raspberry firmware used to pass a FDT blob at a fixed address (0x100),
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but this is not true anymore. The address now depends on both the
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memory size and the blob size [1].
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If one wants to passthrough this FDT blob to the kernel, the most
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reliable way is to save its address from the r2/x0 register in the
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U-Boot entry point and expose it in a environment variable for
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further processing.
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This patch just does this:
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- save the provided address in the global variable fw_dtb_pointer
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- expose it in ${fdt_addr} if it points to a a valid FDT blob
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There are many different ways to use it. One can, for example, use
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the following script which will extract from the tree the command
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line built by the firmware, then hand over the blob to a previously
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loaded kernel:
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fdt addr ${fdt_addr}
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fdt get value bootargs /chosen bootargs
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bootz ${kernel_addr_r} - ${fdt_addr}
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Alternatively, users relying on sysboot/pxe can simply omit any FDT
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statement in their extlinux.conf file, U-Boot will automagically pick
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${fdt_addr} and pass it to the kernel.
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[1] https://www.raspberrypi.org/forums//viewtopic.php?f=107&t=134018
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Upstream-Status: Backport
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Signed-off-by: Cédric Schieli <cschieli@gmail.com>
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Acked-by: Stephen Warren <swarren@nvidia.com>
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Signed-off-by: Jonathan Liu <net147@gmail.com>
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---
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board/raspberrypi/rpi/Makefile | 1 +
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board/raspberrypi/rpi/lowlevel_init.S | 36 +++++++++++++++++++++++++++++++++++
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board/raspberrypi/rpi/rpi.c | 29 ++++++++++++++++++++++++++++
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3 files changed, 66 insertions(+)
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create mode 100644 board/raspberrypi/rpi/lowlevel_init.S
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diff --git a/board/raspberrypi/rpi/Makefile b/board/raspberrypi/rpi/Makefile
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index 4ce2c98..dcb25ac 100644
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--- a/board/raspberrypi/rpi/Makefile
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+++ b/board/raspberrypi/rpi/Makefile
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@@ -5,3 +5,4 @@
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#
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obj-y := rpi.o
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+obj-y += lowlevel_init.o
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diff --git a/board/raspberrypi/rpi/lowlevel_init.S b/board/raspberrypi/rpi/lowlevel_init.S
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new file mode 100644
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index 0000000..cdbd8e1
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--- /dev/null
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+++ b/board/raspberrypi/rpi/lowlevel_init.S
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@@ -0,0 +1,36 @@
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+/*
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+ * (C) Copyright 2016
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+ * Cédric Schieli <cschieli@gmail.com>
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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+
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+#include <config.h>
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+
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+.align 8
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+.global fw_dtb_pointer
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+fw_dtb_pointer:
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+#ifdef CONFIG_ARM64
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+ .dword 0x0
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+#else
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+ .word 0x0
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+#endif
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+
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+/*
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+ * Routine: save_boot_params (called after reset from start.S)
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+ * Description: save ATAG/FDT address provided by the firmware at boot time
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+ */
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+
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+.global save_boot_params
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+save_boot_params:
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+
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+ /* The firmware provided ATAG/FDT address can be found in r2/x0 */
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+#ifdef CONFIG_ARM64
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+ adr x8, fw_dtb_pointer
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+ str x0, [x8]
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+#else
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+ str r2, fw_dtb_pointer
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+#endif
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+
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+ /* Returns */
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+ b save_boot_params_ret
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diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
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index 6245b36..ffd6d31 100644
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--- a/board/raspberrypi/rpi/rpi.c
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+++ b/board/raspberrypi/rpi/rpi.c
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@@ -25,6 +25,9 @@
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DECLARE_GLOBAL_DATA_PTR;
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+/* From lowlevel_init.S */
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+extern unsigned long fw_dtb_pointer;
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+
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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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@@ -285,6 +288,31 @@ static void set_fdtfile(void)
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setenv("fdtfile", fdtfile);
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}
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+/*
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+ * If the firmware provided a valid FDT at boot time, let's expose it in
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+ * ${fdt_addr} so it may be passed unmodified to the kernel.
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+ */
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+static void set_fdt_addr(void)
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+{
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+ if (getenv("fdt_addr"))
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+ return;
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+
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+ if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
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+ return;
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+
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+ setenv_hex("fdt_addr", fw_dtb_pointer);
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+}
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+
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+/*
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+ * Prevent relocation from stomping on a firmware provided FDT blob.
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+ */
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+unsigned long board_get_usable_ram_top(unsigned long total_size)
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+{
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+ if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
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+ return gd->ram_top;
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+ return fw_dtb_pointer & ~0xffff;
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+}
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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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@@ -356,6 +384,7 @@ static void set_serial_number(void)
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int misc_init_r(void)
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{
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+ set_fdt_addr();
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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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--
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2.10.2
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@ -1,6 +1 @@
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FILESEXTRAPATHS_prepend_rpi := "${THISDIR}/files:"
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RDEPENDS_${PN}_append_rpi = " rpi-u-boot-scr"
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RDEPENDS_${PN}_append_rpi = " rpi-u-boot-scr"
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SRC_URI_append_rpi = " \
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file://0001-arm-add-save_boot_params-for-ARM1176.patch \
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file://0002-rpi-passthrough-of-the-firmware-provided-FDT-blob.patch \
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"
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