brcm63xx: 4.1: switch to upstream UHI interface
Replace the appended dtb patch with the upstream accepted version and update the code to work with the changed interface. Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 46181
This commit is contained in:
Jonas Gorski
parent
5e3c3d4788
commit
761fc3f035
4 changed files with 142 additions and 129 deletions
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@ -144,11 +144,12 @@ CONFIG_LIBFDT=y
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# CONFIG_LZ4_DECOMPRESS is not set
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CONFIG_MDIO_BOARDINFO=y
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CONFIG_MIPS=y
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CONFIG_MIPS_APPENDED_DTB=y
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# CONFIG_MIPS_HUGE_TLB_SUPPORT is not set
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CONFIG_MIPS_L1_CACHE_SHIFT=4
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CONFIG_MIPS_L1_CACHE_SHIFT_4=y
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# CONFIG_MIPS_MACHINE is not set
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# CONFIG_MIPS_NO_APPENDED_DTB is not set
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CONFIG_MIPS_RAW_APPENDED_DTB=y
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CONFIG_MODULES_USE_ELF_REL=y
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CONFIG_MODULE_FORCE_LOAD=y
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CONFIG_MODULE_FORCE_UNLOAD=y
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@ -0,0 +1,112 @@
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From 1da8f1798e307fb8422753984339beb00025f97d Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jogo@openwrt.org>
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Date: Sun, 12 Apr 2015 12:24:58 +0200
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Subject: [PATCH] MIPS: Add support for vmlinux.bin appended dtb
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Add support for detecting a vmlinux.bin appended dtb and overriding
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the boot arguments to match the UHI interface.
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Due to the PERCPU section being empty for !SMP, but still modifying
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the current address by aligning it to the page size, do not define
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it for !SMP builds to allow __appended_dtb to still point to
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the actual end of the data.
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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Cc: linux-mips@linux-mips.org
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Cc: devicetree@vger.kernel.org
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Cc: John Crispin <blogic@openwrt.org>
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Cc: Kevin Cernekee <cernekee@gmail.com>
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Cc: Florian Fainelli <f.fainelli@gmail.com>
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Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
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Cc: Markos Chandras <markos.chandras@imgtec.com>
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Cc: Andrew Bresticker <abrestic@chromium.org>
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Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
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Cc: Paul Burton <paul.burton@imgtec.com>
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Cc: James Hartley <James.Hartley@imgtec.com>
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Patchwork: https://patchwork.linux-mips.org/patch/9739/
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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---
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arch/mips/Kconfig | 27 +++++++++++++++++++++++++++
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arch/mips/kernel/head.S | 16 ++++++++++++++++
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arch/mips/kernel/vmlinux.lds.S | 8 +++++++-
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3 files changed, 50 insertions(+), 1 deletion(-)
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--- a/arch/mips/Kconfig
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+++ b/arch/mips/Kconfig
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@@ -2702,6 +2702,33 @@ config BOOT_RAW
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+choice
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+ prompt "Kernel appended dtb support" if OF
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+ default MIPS_NO_APPENDED_DTB
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+
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+ config MIPS_NO_APPENDED_DTB
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+ bool "None"
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+ help
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+ Do not enable appended dtb support.
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+
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+ config MIPS_RAW_APPENDED_DTB
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+ bool "vmlinux.bin"
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+ help
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+ With this option, the boot code will look for a device tree binary
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+ DTB) appended to raw vmlinux.bin (without decompressor).
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+ (e.g. cat vmlinux.bin <filename>.dtb > vmlinux_w_dtb).
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+
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+ This is meant as a backward compatibility convenience for those
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+ systems with a bootloader that can't be upgraded to accommodate
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+ the documented boot protocol using a device tree.
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+
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+ Beware that there is very little in terms of protection against
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+ this option being confused by leftover garbage in memory that might
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+ look like a DTB header after a reboot if no actual DTB is appended
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+ to vmlinux.bin. Do not leave this option active in a production kernel
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+ if you don't intend to always append a DTB.
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+endchoice
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+
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endmenu
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config LOCKDEP_SUPPORT
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--- a/arch/mips/kernel/head.S
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+++ b/arch/mips/kernel/head.S
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@@ -100,6 +100,22 @@ NESTED(kernel_entry, 16, sp) # kernel
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jr t0
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0:
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+#ifdef CONFIG_MIPS_RAW_APPENDED_DTB
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+ PTR_LA t0, __appended_dtb
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+
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+#ifdef CONFIG_CPU_BIG_ENDIAN
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+ li t1, 0xd00dfeed
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+#else
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+ li t1, 0xedfe0dd0
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+#endif
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+ lw t2, (t0)
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+ bne t1, t2, not_found
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+ nop
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+
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+ move a1, t0
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+ PTR_LI a0, -2
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+not_found:
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+#endif
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PTR_LA t0, __bss_start # clear .bss
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LONG_S zero, (t0)
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PTR_LA t1, __bss_stop - LONGSIZE
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--- a/arch/mips/kernel/vmlinux.lds.S
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+++ b/arch/mips/kernel/vmlinux.lds.S
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@@ -125,8 +125,14 @@ SECTIONS
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.exit.data : {
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EXIT_DATA
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}
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-
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+#ifdef CONFIG_SMP
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PERCPU_SECTION(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
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+#endif
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+#ifdef CONFIG_MIPS_RAW_APPENDED_DTB
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+ __appended_dtb = .;
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+ /* leave space for appended DTB */
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+ . += 0x100000;
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+#endif
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/*
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* Align to 64K in attempt to eliminate holes before the
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* .bss..swapper_pg_dir section at the start of .bss. This
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@ -1,124 +0,0 @@
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From 318c1fce4aeef298cbb6153416c499c94ad7cda0 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jogo@openwrt.org>
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Date: Tue, 24 Jun 2014 10:53:15 +0200
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Subject: [PATCH RFC v3] MIPS: add support for vmlinux.bin appended DTB
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Add support for populating initial_boot_params through a dtb
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blob appended to raw vmlinux.bin.
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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---
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Changes RFC v2 -> v3
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* fixed !smp kernels (TODO: move it to its own patch
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Changes RFC v1 -> v2
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* changed all occurences of vmlinux to vmlinux.bin
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* clarified this applies to the raw vmlinux.bin without decompressor
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* s/initial_device_params/initial_boot_params/
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Initial comments by me still valid:
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Mostly adapted from how ARM is doing it.
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Sent as an RFC PATCH because I am not sure if this is the right way to
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it, and whether storing the pointer in initial_boot_params is a good
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idea, or a new variable should be introduced.
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The reasoning for initial_boot_params is that there is no common
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MIPS interface yet, so the next best thing was using that. This also
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has the advantage of keeping the original fw_args intact.
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This patch works for me on bcm63xx, where the bootloader expects
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an lzma compressed kernel, so I didn't want to double compress using
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the in-kernel compressed kernel support.
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Completely untested on anything except MIPS32 / big endian.
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arch/mips/Kconfig | 18 ++++++++++++++++++
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arch/mips/kernel/head.S | 19 +++++++++++++++++++
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arch/mips/kernel/vmlinux.lds.S | 7 +++++++
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3 files changed, 43 insertions(+)
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--- a/arch/mips/Kconfig
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+++ b/arch/mips/Kconfig
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@@ -2831,6 +2831,24 @@ config RAPIDIO
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source "drivers/rapidio/Kconfig"
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+config MIPS_APPENDED_DTB
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+ bool "Use appended device tree blob to vmlinux.bin (EXPERIMENTAL)"
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+ depends on OF
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+ help
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+ With this option, the boot code will look for a device tree binary
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+ DTB) appended to raw vmlinux.bin (without decompressor).
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+ (e.g. cat vmlinux.bin <filename>.dtb > vmlinux_w_dtb).
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+
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+ This is meant as a backward compatibility convenience for those
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+ systems with a bootloader that can't be upgraded to accommodate
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+ the documented boot protocol using a device tree.
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+
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+ Beware that there is very little in terms of protection against
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+ this option being confused by leftover garbage in memory that might
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+ look like a DTB header after a reboot if no actual DTB is appended
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+ to vmlinux.bin. Do not leave this option active in a production kernel
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+ if you don't intend to always append a DTB.
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+
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endmenu
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menu "Executable file formats"
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--- a/arch/mips/kernel/head.S
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+++ b/arch/mips/kernel/head.S
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@@ -100,6 +100,22 @@ NESTED(kernel_entry, 16, sp) # kernel
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jr t0
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0:
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+#ifdef CONFIG_MIPS_APPENDED_DTB
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+ PTR_LA t0, __appended_dtb
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+ PTR_LI t3, 0
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+
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+#ifdef CONFIG_CPU_BIG_ENDIAN
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+ PTR_LI t1, 0xd00dfeed
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+#else
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+ PTR_LI t1, 0xedfe0dd0
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+#endif
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+ LONG_L t2, (t0)
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+ bne t1, t2, not_found
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+
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+ PTR_LA t3, __appended_dtb
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+
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+not_found:
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+#endif
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PTR_LA t0, __bss_start # clear .bss
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LONG_S zero, (t0)
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PTR_LA t1, __bss_stop - LONGSIZE
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@@ -113,6 +129,10 @@ NESTED(kernel_entry, 16, sp) # kernel
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LONG_S a2, fw_arg2
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LONG_S a3, fw_arg3
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+#ifdef CONFIG_MIPS_APPENDED_DTB
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+ LONG_S t3, initial_boot_params
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+#endif
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+
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MTC0 zero, CP0_CONTEXT # clear context register
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PTR_LA $28, init_thread_union
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/* Set the SP after an empty pt_regs. */
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--- a/arch/mips/kernel/vmlinux.lds.S
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+++ b/arch/mips/kernel/vmlinux.lds.S
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@@ -125,8 +125,14 @@ SECTIONS
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.exit.data : {
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EXIT_DATA
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}
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-
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+#ifdef CONFIG_SMP
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PERCPU_SECTION(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
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+#endif
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+#ifdef CONFIG_MIPS_APPENDED_DTB
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+ __appended_dtb = .;
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+ /* leave space for appended DTB */
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+ . = . + 0x100000;
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+#endif
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/*
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* Align to 64K in attempt to eliminate holes before the
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* .bss..swapper_pg_dir section at the start of .bss. This
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@ -1,12 +1,14 @@
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From db896341299cbcb703821228574ba9b79b6a3565 Mon Sep 17 00:00:00 2001
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From 26546e5499d98616322fb3472b977e2e86603f3a Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jogo@openwrt.org>
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Date: Tue, 24 Jun 2014 10:57:51 +0200
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Subject: [PATCH 45/48] MIPS: BCM63XX: add support for loading DTB
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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---
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arch/mips/bcm63xx/boards/Kconfig | 4 ++++
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arch/mips/bcm63xx/boards/board_common.c | 34 +++++++++++++++++++++++++++++++++
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2 files changed, 38 insertions(+)
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arch/mips/bcm63xx/boards/board_common.c | 34 +++++++++++++++++++++++++++++++
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arch/mips/bcm63xx/prom.c | 6 ++++++
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3 files changed, 44 insertions(+)
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--- a/arch/mips/bcm63xx/boards/Kconfig
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+++ b/arch/mips/bcm63xx/boards/Kconfig
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@ -94,3 +96,25 @@ Subject: [PATCH 45/48] MIPS: BCM63XX: add support for loading DTB
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if (board.has_uart0)
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bcm63xx_uart_register(0);
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--- a/arch/mips/bcm63xx/prom.c
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+++ b/arch/mips/bcm63xx/prom.c
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@@ -8,6 +8,7 @@
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#include <linux/init.h>
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#include <linux/bootmem.h>
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+#include <linux/of_fdt.h>
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#include <linux/smp.h>
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#include <asm/bootinfo.h>
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#include <asm/bmips.h>
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@@ -23,6 +24,11 @@ void __init prom_init(void)
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{
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u32 reg, mask;
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+#if CONFIG_OF
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+ if (fw_arg0 == -2)
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+ early_init_dt_verify((void *)fw_arg1);
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+#endif
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+
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bcm63xx_cpu_init();
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/* stop any running watchdog */
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