From 0b8dfe085180b58b81d2657c76b080168e3bc8df Mon Sep 17 00:00:00 2001
From: Birger Koblitz <git@birger-koblitz.de>
Date: Wed, 19 Jan 2022 18:14:02 +0100
Subject: [PATCH] realtek: Add RTL931X sub-target

We add the RTL931X sub-target with kernel configuration for
a dual core MIPS InterAptive CPU.

Submitted-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Submitted-by: Birger Koblitz <git@birger-koblitz.de>
---
 arch/mips/Makefile                            | 10 +++++++++++++--
 arch/mips/kernel/head.S                       |  4 ++++
 aarch/mips/kernel/vmlinux.lds.S               |  4 ++++
 3 files changed, 18 insertions(+), 2 deletions(-)

--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -307,14 +307,24 @@ endif
 
 KBUILD_AFLAGS	+= $(cflags-y)
 KBUILD_CFLAGS	+= $(cflags-y)
+ifdef CONFIG_931X
+KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
+bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y) \
+		  VMLINUX_ENTRY_ADDRESS=$(entry-y) \
+		  PLATFORM="$(platform-y)" \
+		  ITS_INPUTS="$(its-y)"
+else
 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
-KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
-
 bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y) \
 		  LINKER_LOAD_ADDRESS=$(load-ld) \
 		  VMLINUX_ENTRY_ADDRESS=$(entry-y) \
 		  PLATFORM="$(platform-y)" \
 		  ITS_INPUTS="$(its-y)"
+endif
+KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
+
+
+
 ifdef CONFIG_32BIT
 bootvars-y	+= ADDR_BITS=32
 endif
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -60,12 +60,14 @@
 	.endm
 
 #ifndef CONFIG_NO_EXCEPT_FILL
+#ifndef CONFIG_RTL931X
 	/*
 	 * Reserved space for exception handlers.
 	 * Necessary for machines which link their kernels at KSEG0.
 	 */
 	.fill	0x400
 #endif
+#endif
 
 EXPORT(_stext)
 
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -55,7 +55,11 @@ SECTIONS
 	/* . = 0xa800000000300000; */
 	. = 0xffffffff80300000;
 #endif
+#ifdef CONFIG_RTL931X
+	. = 0x80220000;
+#else
 	. = LINKER_LOAD_ADDRESS;
+#endif
 	/* read-only */
 	_text = .;	/* Text and read-only data */
 	.text : {