diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/332-arc-add-OWRTDTB-section.patch')
| -rw-r--r-- | target/linux/generic/pending-5.4/332-arc-add-OWRTDTB-section.patch | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/target/linux/generic/pending-5.4/332-arc-add-OWRTDTB-section.patch b/target/linux/generic/pending-5.4/332-arc-add-OWRTDTB-section.patch deleted file mode 100644 index 4b0534eff7..0000000000 --- a/target/linux/generic/pending-5.4/332-arc-add-OWRTDTB-section.patch +++ /dev/null @@ -1,84 +0,0 @@ -From bb0c3b0175240bf152fd7c644821a0cf9f77c37c Mon Sep 17 00:00:00 2001 -From: Evgeniy Didin <Evgeniy.Didin@synopsys.com> -Date: Fri, 15 Mar 2019 18:53:38 +0300 -Subject: [PATCH] arc add OWRTDTB section - -This change allows OpenWRT to patch resulting kernel binary with -external .dtb. - -That allows us to re-use exactky the same vmlinux on different boards -given its ARC core configurations match (at least cache line sizes etc). - -""patch-dtb" searches for ASCII "OWRTDTB:" strign and copies external -.dtb right after it, keeping the string in place. - -Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> -Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> -Signed-off-by: Evgeniy Didin <Evgeniy.Didin@synopsys.com> ---- - arch/arc/kernel/head.S | 10 ++++++++++ - arch/arc/kernel/setup.c | 4 +++- - arch/arc/kernel/vmlinux.lds.S | 13 +++++++++++++ - 3 files changed, 26 insertions(+), 1 deletion(-) - ---- a/arch/arc/kernel/head.S -+++ b/arch/arc/kernel/head.S -@@ -61,6 +61,16 @@ - #endif - .endm - -+ ; Here "patch-dtb" will embed external .dtb -+ ; Note "patch-dtb" searches for ASCII "OWRTDTB:" string -+ ; and pastes .dtb right after it, hense the string precedes -+ ; __image_dtb symbol. -+ .section .owrt, "aw",@progbits -+ .ascii "OWRTDTB:" -+ENTRY(__image_dtb) -+ .fill 0x4000 -+END(__image_dtb) -+ - .section .init.text, "ax",@progbits - - ;---------------------------------------------------------------- ---- a/arch/arc/kernel/setup.c -+++ b/arch/arc/kernel/setup.c -@@ -492,6 +492,8 @@ static inline bool uboot_arg_invalid(uns - /* We always pass 0 as magic from U-boot */ - #define UBOOT_MAGIC_VALUE 0 - -+extern struct boot_param_header __image_dtb; -+ - void __init handle_uboot_args(void) - { - bool use_embedded_dtb = true; -@@ -530,7 +532,7 @@ void __init handle_uboot_args(void) - ignore_uboot_args: - - if (use_embedded_dtb) { -- machine_desc = setup_machine_fdt(__dtb_start); -+ machine_desc = setup_machine_fdt(&__image_dtb); - if (!machine_desc) - panic("Embedded DT invalid\n"); - } ---- a/arch/arc/kernel/vmlinux.lds.S -+++ b/arch/arc/kernel/vmlinux.lds.S -@@ -27,6 +27,19 @@ SECTIONS - - . = CONFIG_LINUX_LINK_BASE; - -+ /* -+ * In OpenWRT we want to patch built binary embedding .dtb of choice. -+ * This is implemented with "patch-dtb" utility which searches for -+ * "OWRTDTB:" string in first 16k of image and if it is found -+ * copies .dtb right after mentioned string. -+ * -+ * Note: "OWRTDTB:" won't be overwritten with .dtb, .dtb will follow it. -+ */ -+ .owrt : { -+ *(.owrt) -+ . = ALIGN(PAGE_SIZE); -+ } -+ - _int_vec_base_lds = .; - .vector : { - *(.vector) |