Merge tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

 - added support for Nintendo N64

 - added support for Realtek RTL83XX SoCs

 - kaslr support for Loongson64

 - first steps to get rid of set_fs()

 - DMA runtime coherent/non-coherent selection cleanup

 - cleanups and fixes

* tag 'mips_5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (98 commits)
  Revert "MIPS: Add basic support for ptrace single step"
  vmlinux.lds.h: catch more UBSAN symbols into .data
  MIPS: kernel: Drop kgdb_call_nmi_hook
  MAINTAINERS: Add git tree for KVM/mips
  MIPS: Use common way to parse elfcorehdr
  MIPS: Simplify EVA cache handling
  Revert "MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes"
  MIPS: remove CONFIG_DMA_PERDEV_COHERENT
  MIPS: remove CONFIG_DMA_MAYBE_COHERENT
  driver core: lift dma_default_coherent into common code
  MIPS: refactor the runtime coherent vs noncoherent DMA indicators
  MIPS/alchemy: factor out the DMA coherent setup
  MIPS/malta: simplify plat_setup_iocoherency
  MIPS: Add basic support for ptrace single step
  MAINTAINERS: replace non-matching patterns for loongson{2,3}
  MIPS: Make check condition for SDBBP consistent with EJTAG spec
  mips: Replace lkml.org links with lore
  Revert "MIPS: microMIPS: Fix the judgment of mm_jr16_op and mm_jalr_op"
  MIPS: crash_dump.c: Simplify copy_oldmem_page()
  Revert "mips: Manually call fdt_init_reserved_mem() method"
  ...

1 files changed, 21 insertions, 1 deletions

diff --git a/arch/mips/include/asm/bootinfo.h b/arch/mips/include/asm/bootinfo.h
index aa03b1237155..5be10ece3ef0 100644
--- a/arch/mips/include/asm/bootinfo.h
+++ b/arch/mips/include/asm/bootinfo.h
@@ -112,7 +112,27 @@ extern char arcs_cmdline[COMMAND_LINE_SIZE];
 extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
 
 #ifdef CONFIG_USE_OF
-extern unsigned long fw_passed_dtb;
+#include <linux/libfdt.h>
+#include <linux/of_fdt.h>
+
+extern char __appended_dtb[];
+
+static inline void *get_fdt(void)
+{
+	if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) ||
+	    IS_ENABLED(CONFIG_MIPS_ELF_APPENDED_DTB))
+		if (fdt_magic(&__appended_dtb) == FDT_MAGIC)
+			return &__appended_dtb;
+
+	if (fw_arg0 == -2) /* UHI interface */
+		return (void *)fw_arg1;
+
+	if (IS_ENABLED(CONFIG_BUILTIN_DTB))
+		if (&__dtb_start != &__dtb_end)
+			return &__dtb_start;
+
+	return NULL;
+}
 #endif
 
 /*