diff options
Diffstat (limited to 'target/linux/generic/pending-4.9/332-arc-add-OWRTDTB-section.patch')
| -rw-r--r-- | target/linux/generic/pending-4.9/332-arc-add-OWRTDTB-section.patch | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/target/linux/generic/pending-4.9/332-arc-add-OWRTDTB-section.patch b/target/linux/generic/pending-4.9/332-arc-add-OWRTDTB-section.patch deleted file mode 100644 index ca89f87594..0000000000 --- a/target/linux/generic/pending-4.9/332-arc-add-OWRTDTB-section.patch +++ /dev/null @@ -1,80 +0,0 @@ -From: Alexey Brodkin <abrodkin@synopsys.com> -Subject: openwrt: 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: Alexey Brodkin <abrodkin@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 -@@ -59,6 +59,16 @@ - #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 -@@ -444,7 +444,7 @@ ignore_uboot_args: - #endif - - 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"); - } -@@ -460,6 +460,8 @@ ignore_uboot_args: - } - } - -+extern struct boot_param_header __image_dtb; -+ - void __init setup_arch(char **cmdline_p) - { - handle_uboot_args(); ---- a/arch/arc/kernel/vmlinux.lds.S -+++ b/arch/arc/kernel/vmlinux.lds.S -@@ -30,6 +30,19 @@ 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) |