diff options
Diffstat (limited to 'target/linux/generic/pending-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch')
| -rw-r--r-- | target/linux/generic/pending-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/target/linux/generic/pending-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch b/target/linux/generic/pending-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch deleted file mode 100644 index 78188dd298..0000000000 --- a/target/linux/generic/pending-4.4/092-MIPS-ZBOOT-copy-appended-dtb-to-the-end-of-the-kerne.patch +++ /dev/null @@ -1,132 +0,0 @@ -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 |