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This makes the patches which were just copied in the previous commit apply on top of kernel 4.19. The patches in the backports-4.19 folder were checked if they are really in kernel 4.19 based on the title and only removed if they were found in the upstream kernel. The following additional patches form the pending folder went into upstream Linux 4.19: pending-4.19/171-usb-dwc2-Fix-inefficient-copy-of-unaligned-buffers.patch pending-4.19/190-2-5-e1000e-Fix-wrong-comment-related-to-link-detection.patch pending-4.19/478-mtd-spi-nor-Add-support-for-XM25QH64A-and-XM25QH128A.patch pending-4.19/479-mtd-spi-nor-add-eon-en25qh32.patch pending-4.19/950-tty-serial-exar-generalize-rs485-setup.patch pending-4.19/340-MIPS-mm-remove-mips_dma_mapping_error.patch Bigger changes were introduced to the m25p80 spi nor driver, as far as I saw it in the new code, it now has the functionality provided in this patch: pending-4.19/450-mtd-m25p80-allow-fallback-from-spi_flash_read-to-reg.patch Part of this patch went upstream independent of OpenWrt: hack-4.19/220-gc_sections.patch This patch was reworked to match the changes done upstream. The MIPS DMA API changed a lot, this patch was rewritten to match the new DMA handling: pending-4.19/341-MIPS-mm-remove-no-op-dma_map_ops-where-possible.patch I did bigger manual changes to the following patches and I am not 100% sure if they are all correct: pending-4.19/0931-w1-gpio-fix-problem-with-platfom-data-in-w1-gpio.patch pending-4.19/411-mtd-partial_eraseblock_write.patch pending-4.19/600-netfilter_conntrack_flush.patch pending-4.19/611-netfilter_match_bypass_default_table.patch pending-4.19/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch hack-4.19/211-host_tools_portability.patch hack-4.19/221-module_exports.patch hack-4.19/321-powerpc_crtsavres_prereq.patch hack-4.19/902-debloat_proc.patch This is based on patchset from Marko Ratkaj <marko.ratkaj@sartura.hr> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
81 lines
2.2 KiB
Diff
81 lines
2.2 KiB
Diff
From: Alexey Brodkin <abrodkin@synopsys.com>
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Subject: openwrt: arc - add OWRTDTB section
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This change allows OpenWRT to patch resulting kernel binary with
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external .dtb.
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That allows us to re-use exactky the same vmlinux on different boards
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given its ARC core configurations match (at least cache line sizes etc).
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""patch-dtb" searches for ASCII "OWRTDTB:" strign and copies external
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.dtb right after it, keeping the string in place.
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Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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---
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arch/arc/kernel/head.S | 10 ++++++++++
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arch/arc/kernel/setup.c | 4 +++-
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arch/arc/kernel/vmlinux.lds.S | 13 +++++++++++++
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3 files changed, 26 insertions(+), 1 deletion(-)
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--- a/arch/arc/kernel/head.S
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+++ b/arch/arc/kernel/head.S
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@@ -49,6 +49,16 @@
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1:
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.endm
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+; Here "patch-dtb" will embed external .dtb
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+; Note "patch-dtb" searches for ASCII "OWRTDTB:" string
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+; and pastes .dtb right after it, hense the string precedes
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+; __image_dtb symbol.
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+ .section .owrt, "aw",@progbits
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+ .ascii "OWRTDTB:"
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+ENTRY(__image_dtb)
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+ .fill 0x4000
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+END(__image_dtb)
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+
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.section .init.text, "ax",@progbits
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;----------------------------------------------------------------
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--- a/arch/arc/kernel/setup.c
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+++ b/arch/arc/kernel/setup.c
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@@ -456,6 +456,8 @@ static inline int is_kernel(unsigned lon
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return 0;
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}
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+extern struct boot_param_header __image_dtb;
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+
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void __init setup_arch(char **cmdline_p)
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{
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#ifdef CONFIG_ARC_UBOOT_SUPPORT
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@@ -469,7 +471,7 @@ void __init setup_arch(char **cmdline_p)
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#endif
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{
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/* No, so try the embedded one */
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- machine_desc = setup_machine_fdt(__dtb_start);
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+ machine_desc = setup_machine_fdt(&__image_dtb);
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if (!machine_desc)
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panic("Embedded DT invalid\n");
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--- a/arch/arc/kernel/vmlinux.lds.S
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+++ b/arch/arc/kernel/vmlinux.lds.S
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@@ -30,6 +30,19 @@ SECTIONS
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. = CONFIG_LINUX_LINK_BASE;
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+ /*
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+ * In OpenWRT we want to patch built binary embedding .dtb of choice.
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+ * This is implemented with "patch-dtb" utility which searches for
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+ * "OWRTDTB:" string in first 16k of image and if it is found
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+ * copies .dtb right after mentioned string.
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+ *
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+ * Note: "OWRTDTB:" won't be overwritten with .dtb, .dtb will follow it.
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+ */
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+ .owrt : {
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+ *(.owrt)
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+ . = ALIGN(PAGE_SIZE);
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+ }
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+
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_int_vec_base_lds = .;
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.vector : {
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*(.vector)
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