+++ /dev/null
-From b8f54f2cde788623f41d11327688c75aed34092f Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jogo@openwrt.org>
-Date: Mon, 20 Jun 2016 11:27:36 +0200
-Subject: [PATCH 1/2] MIPS: ZBOOT: copy appended dtb to the end of the kernel
-
-Instead of rewriting the arguments, just move the appended dtb to where
-the decompressed kernel expects it. This eliminates the need for special
-casing vmlinuz.bin appended dtb files.
-
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
-Cc: Kevin Cernekee <cernekee@gmail.com>
-Cc: Florian Fainelli <f.fainelli@gmail.com>
-Cc: John Crispin <john@phrozen.org>
-Cc: Paul Burton <paul.burton@imgtec.com>
-Cc: James Hogan <james.hogan@imgtec.com>
-Cc: Alban Bedel <albeu@free.fr>
-Cc: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
-Cc: Antony Pavlov <antonynpavlov@gmail.com>
-Cc: linux-mips@linux-mips.org
-Patchwork: https://patchwork.linux-mips.org/patch/13698/
-Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
----
- arch/mips/Kconfig | 22 ++--------------------
- arch/mips/boot/compressed/decompress.c | 17 +++++++++++++++++
- arch/mips/boot/compressed/head.S | 16 ----------------
- 3 files changed, 19 insertions(+), 36 deletions(-)
-
---- a/arch/mips/Kconfig
-+++ b/arch/mips/Kconfig
-@@ -2753,10 +2753,10 @@ choice
- the documented boot protocol using a device tree.
-
- config MIPS_RAW_APPENDED_DTB
-- bool "vmlinux.bin"
-+ bool "vmlinux.bin or vmlinuz.bin"
- help
- With this option, the boot code will look for a device tree binary
-- DTB) appended to raw vmlinux.bin (without decompressor).
-+ DTB) appended to raw vmlinux.bin or vmlinuz.bin.
- (e.g. cat vmlinux.bin <filename>.dtb > vmlinux_w_dtb).
-
- This is meant as a backward compatibility convenience for those
-@@ -2768,24 +2768,6 @@ choice
- look like a DTB header after a reboot if no actual DTB is appended
- to vmlinux.bin. Do not leave this option active in a production kernel
- if you don't intend to always append a DTB.
--
-- config MIPS_ZBOOT_APPENDED_DTB
-- bool "vmlinuz.bin"
-- depends on SYS_SUPPORTS_ZBOOT
-- help
-- With this option, the boot code will look for a device tree binary
-- DTB) appended to raw vmlinuz.bin (with decompressor).
-- (e.g. cat vmlinuz.bin <filename>.dtb > vmlinuz_w_dtb).
--
-- This is meant as a backward compatibility convenience for those
-- systems with a bootloader that can't be upgraded to accommodate
-- the documented boot protocol using a device tree.
--
-- Beware that there is very little in terms of protection against
-- this option being confused by leftover garbage in memory that might
-- look like a DTB header after a reboot if no actual DTB is appended
-- to vmlinuz.bin. Do not leave this option active in a production kernel
-- if you don't intend to always append a DTB.
- endchoice
-
- choice
---- a/arch/mips/boot/compressed/decompress.c
-+++ b/arch/mips/boot/compressed/decompress.c
-@@ -14,6 +14,7 @@
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
-+#include <linux/libfdt.h>
-
- #include <asm/addrspace.h>
-
-@@ -36,6 +37,8 @@ extern void puthex(unsigned long long va
- #define puthex(val) do {} while (0)
- #endif
-
-+extern char __appended_dtb[];
-+
- void error(char *x)
- {
- puts("\n\n");
-@@ -114,6 +117,20 @@ void decompress_kernel(unsigned long boo
- __decompress((char *)zimage_start, zimage_size, 0, 0,
- (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error);
-
-+ if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) &&
-+ fdt_magic((void *)&__appended_dtb) == FDT_MAGIC) {
-+ unsigned int image_size, dtb_size;
-+
-+ dtb_size = fdt_totalsize((void *)&__appended_dtb);
-+
-+ /* last four bytes is always image size in little endian */
-+ image_size = le32_to_cpup((void *)&__image_end - 4);
-+
-+ /* copy dtb to where the booted kernel will expect it */
-+ memcpy((void *)VMLINUX_LOAD_ADDRESS_ULL + image_size,
-+ __appended_dtb, dtb_size);
-+ }
-+
- /* FIXME: should we flush cache here? */
- puts("Now, booting the kernel...\n");
- }
---- a/arch/mips/boot/compressed/head.S
-+++ b/arch/mips/boot/compressed/head.S
-@@ -25,22 +25,6 @@ start:
- move s2, a2
- move s3, a3
-
--#ifdef CONFIG_MIPS_ZBOOT_APPENDED_DTB
-- PTR_LA t0, __appended_dtb
--#ifdef CONFIG_CPU_BIG_ENDIAN
-- li t1, 0xd00dfeed
--#else
-- li t1, 0xedfe0dd0
--#endif
-- lw t2, (t0)
-- bne t1, t2, not_found
-- nop
--
-- move s1, t0
-- PTR_LI s0, -2
--not_found:
--#endif
--
- /* Clear BSS */
- PTR_LA a0, _edata
- PTR_LA a2, _end
projects / openwrt / openwrt.git / blobdiff