20 files changed, 954 insertions, 0 deletions
diff --git a/arch/sh/boot/.gitignore b/arch/sh/boot/.gitignore
new file mode 100644
index 000000000..6603bbbc9
--- /dev/null
+++ b/arch/sh/boot/.gitignore
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+zImage
+vmlinux*
+uImage*
+!vmlinux.scr
diff --git a/arch/sh/boot/Makefile b/arch/sh/boot/Makefile
new file mode 100644
index 000000000..1f5d2df3c
--- /dev/null
+++ b/arch/sh/boot/Makefile
@@ -0,0 +1,115 @@
+#
+# arch/sh/boot/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1999 Stuart Menefy
+#
+
+#
+# Assign safe dummy values if these variables are not defined,
+# in order to suppress error message.
+#
+CONFIG_PAGE_OFFSET	?= 0x80000000
+CONFIG_MEMORY_START	?= 0x0c000000
+CONFIG_BOOT_LINK_OFFSET	?= 0x00800000
+CONFIG_ZERO_PAGE_OFFSET	?= 0x00001000
+CONFIG_ENTRY_OFFSET	?= 0x00001000
+CONFIG_PHYSICAL_START	?= $(CONFIG_MEMORY_START)
+
+suffix_y := bin
+suffix_$(CONFIG_KERNEL_GZIP)	:= gz
+suffix_$(CONFIG_KERNEL_BZIP2)	:= bz2
+suffix_$(CONFIG_KERNEL_LZMA)	:= lzma
+suffix_$(CONFIG_KERNEL_XZ)	:= xz
+suffix_$(CONFIG_KERNEL_LZO)	:= lzo
+
+targets := zImage vmlinux.srec romImage uImage uImage.srec uImage.gz \
+	   uImage.bz2 uImage.lzma uImage.xz uImage.lzo uImage.bin \
+	   vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
+	   vmlinux.bin.xz vmlinux.bin.lzo
+subdir- := compressed romimage
+
+$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
+	$(call if_changed,objcopy)
+	@echo '  Kernel: $@ is ready'
+
+$(obj)/compressed/vmlinux: FORCE
+	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
+
+$(obj)/romImage: $(obj)/romimage/vmlinux FORCE
+	$(call if_changed,objcopy)
+	@echo '  Kernel: $@ is ready'
+
+$(obj)/romimage/vmlinux: $(obj)/zImage FORCE
+	$(Q)$(MAKE) $(build)=$(obj)/romimage $@
+
+KERNEL_MEMORY	:= $(shell /bin/bash -c 'printf "0x%08x" \
+		     $$[$(CONFIG_PHYSICAL_START) & 0x1fffffff]')
+
+KERNEL_LOAD	:= $(shell /bin/bash -c 'printf "0x%08x" \
+		     $$[$(CONFIG_PAGE_OFFSET)  + \
+			$(KERNEL_MEMORY) + \
+			$(CONFIG_ZERO_PAGE_OFFSET)]')
+
+KERNEL_ENTRY	:= $(shell /bin/bash -c 'printf "0x%08x" \
+		     $$[$(CONFIG_PAGE_OFFSET)  + \
+			$(KERNEL_MEMORY) + \
+			$(CONFIG_ZERO_PAGE_OFFSET) + $(CONFIG_ENTRY_OFFSET)]')
+
+UIMAGE_LOADADDR = $(KERNEL_LOAD)
+UIMAGE_ENTRYADDR = $(KERNEL_ENTRY)
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,gzip)
+
+$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,bzip2)
+
+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,lzma)
+
+$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,xzkern)
+
+$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,lzo)
+
+$(obj)/uImage.bz2: $(obj)/vmlinux.bin.bz2 FORCE
+	$(call if_changed,uimage,bzip2)
+
+$(obj)/uImage.gz: $(obj)/vmlinux.bin.gz FORCE
+	$(call if_changed,uimage,gzip)
+
+$(obj)/uImage.lzma: $(obj)/vmlinux.bin.lzma FORCE
+	$(call if_changed,uimage,lzma)
+
+$(obj)/uImage.xz: $(obj)/vmlinux.bin.xz FORCE
+	$(call if_changed,uimage,xz)
+
+$(obj)/uImage.lzo: $(obj)/vmlinux.bin.lzo FORCE
+	$(call if_changed,uimage,lzo)
+
+$(obj)/uImage.bin: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,uimage,none)
+
+OBJCOPYFLAGS_vmlinux.srec := -I binary -O srec
+$(obj)/vmlinux.srec: $(obj)/compressed/vmlinux FORCE
+	$(call if_changed,objcopy)
+
+OBJCOPYFLAGS_uImage.srec := -I binary -O srec
+$(obj)/uImage.srec: $(obj)/uImage FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/uImage: $(obj)/uImage.$(suffix_y)
+	@ln -sf $(notdir $<) $@
+	@echo '  Image $@ is ready'
+
+export CONFIG_PAGE_OFFSET CONFIG_MEMORY_START CONFIG_BOOT_LINK_OFFSET \
+       CONFIG_PHYSICAL_START CONFIG_ZERO_PAGE_OFFSET CONFIG_ENTRY_OFFSET \
+       KERNEL_MEMORY suffix_y
diff --git a/arch/sh/boot/compressed/.gitignore b/arch/sh/boot/compressed/.gitignore
new file mode 100644
index 000000000..cd16663bc
--- /dev/null
+++ b/arch/sh/boot/compressed/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+vmlinux.bin.*
diff --git a/arch/sh/boot/compressed/Makefile b/arch/sh/boot/compressed/Makefile
new file mode 100644
index 000000000..591125c42
--- /dev/null
+++ b/arch/sh/boot/compressed/Makefile
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# linux/arch/sh/boot/compressed/Makefile
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+OBJECTS := head_32.o misc.o cache.o piggy.o \
+           ashiftrt.o ashldi3.o ashrsi3.o ashlsi3.o lshrsi3.o
+
+# These were previously generated files. When you are building the kernel
+# with O=, make sure to remove the stale files in the output tree. Otherwise,
+# the build system wrongly compiles the stale ones.
+ifdef building_out_of_srctree
+$(shell rm -f $(addprefix $(obj)/, ashiftrt.S ashldi3.c ashrsi3.S ashlsi3.S lshrsi3.S))
+endif
+
+targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 \
+           vmlinux.bin.lzma vmlinux.bin.xz vmlinux.bin.lzo $(OBJECTS)
+
+GCOV_PROFILE := n
+
+#
+# IMAGE_OFFSET is the load offset of the compression loader
+#
+ifeq ($(CONFIG_32BIT),y)
+IMAGE_OFFSET	:= $(shell /bin/bash -c 'printf "0x%08x" \
+		     $$[$(CONFIG_MEMORY_START)  + \
+			$(CONFIG_BOOT_LINK_OFFSET)]')
+else
+IMAGE_OFFSET	:= $(shell /bin/bash -c 'printf "0x%08x" \
+		     $$[$(CONFIG_PAGE_OFFSET)  + \
+			$(KERNEL_MEMORY) + \
+			$(CONFIG_BOOT_LINK_OFFSET)]')
+endif
+
+ccflags-remove-$(CONFIG_MCOUNT) += -pg
+
+LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(IMAGE_OFFSET) -e startup \
+		   -T $(obj)/../../kernel/vmlinux.lds
+
+KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
+
+$(obj)/vmlinux: $(addprefix $(obj)/, $(OBJECTS)) FORCE
+	$(call if_changed,ld)
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,gzip)
+$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,bzip2_with_size)
+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,lzma_with_size)
+$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,xzkern_with_size)
+$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,lzo_with_size)
+
+OBJCOPYFLAGS += -R .empty_zero_page
+
+LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE
+	$(call if_changed,ld)
diff --git a/arch/sh/boot/compressed/ashiftrt.S b/arch/sh/boot/compressed/ashiftrt.S
new file mode 100644
index 000000000..0f3b291a3
--- /dev/null
+++ b/arch/sh/boot/compressed/ashiftrt.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/ashiftrt.S"
diff --git a/arch/sh/boot/compressed/ashldi3.c b/arch/sh/boot/compressed/ashldi3.c
new file mode 100644
index 000000000..7cebd646d
--- /dev/null
+++ b/arch/sh/boot/compressed/ashldi3.c
@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include "../../lib/ashldi3.c"
diff --git a/arch/sh/boot/compressed/ashlsi3.S b/arch/sh/boot/compressed/ashlsi3.S
new file mode 100644
index 000000000..e354262b2
--- /dev/null
+++ b/arch/sh/boot/compressed/ashlsi3.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/ashlsi3.S"
diff --git a/arch/sh/boot/compressed/ashrsi3.S b/arch/sh/boot/compressed/ashrsi3.S
new file mode 100644
index 000000000..e564be9a4
--- /dev/null
+++ b/arch/sh/boot/compressed/ashrsi3.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/ashrsi3.S"
diff --git a/arch/sh/boot/compressed/cache.c b/arch/sh/boot/compressed/cache.c
new file mode 100644
index 000000000..31e04ff48
--- /dev/null
+++ b/arch/sh/boot/compressed/cache.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0
+int cache_control(unsigned int command)
+{
+	volatile unsigned int *p = (volatile unsigned int *) 0x80000000;
+	int i;
+
+	for (i = 0; i < (32 * 1024); i += 32) {
+		(void)*p;
+		p += (32 / sizeof(int));
+	}
+
+	return 0;
+}
diff --git a/arch/sh/boot/compressed/head_32.S b/arch/sh/boot/compressed/head_32.S
new file mode 100644
index 000000000..7bb168133
--- /dev/null
+++ b/arch/sh/boot/compressed/head_32.S
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  linux/arch/sh/boot/compressed/head.S
+ *
+ *  Copyright (C) 1999 Stuart Menefy
+ *  Copyright (C) 2003 SUGIOKA Toshinobu
+ */
+
+.text
+
+#include <asm/page.h>
+
+	.global	startup
+startup:
+	/* Load initial status register */
+	mov.l   init_sr, r1
+	ldc     r1, sr
+
+	/* Move myself to proper location if necessary */
+	mova	1f, r0
+	mov.l	1f, r2
+	cmp/eq	r2, r0
+	bt	clear_bss
+	sub	r0, r2
+	mov.l	bss_start_addr, r0
+	mov	#0xffffffe0, r1
+	and	r1, r0			! align cache line
+	mov.l	text_start_addr, r3
+	mov	r0, r1
+	sub	r2, r1
+3:
+	mov.l	@r1, r4
+	mov.l	@(4,r1), r5
+	mov.l	@(8,r1), r6
+	mov.l	@(12,r1), r7
+	mov.l	@(16,r1), r8
+	mov.l	@(20,r1), r9
+	mov.l	@(24,r1), r10
+	mov.l	@(28,r1), r11
+	mov.l	r4, @r0
+	mov.l	r5, @(4,r0)
+	mov.l	r6, @(8,r0)
+	mov.l	r7, @(12,r0)
+	mov.l	r8, @(16,r0)
+	mov.l	r9, @(20,r0)
+	mov.l	r10, @(24,r0)
+	mov.l	r11, @(28,r0)
+#ifdef CONFIG_CPU_SH4
+	ocbwb	@r0
+#endif
+	cmp/hi	r3, r0
+	add	#-32, r0
+	bt/s	3b
+	 add	#-32, r1
+	mov.l	2f, r0
+	jmp	@r0
+	 nop
+
+	.align 2
+1:	.long	1b
+2:	.long	clear_bss
+text_start_addr:
+	.long	startup
+
+	/* Clear BSS */
+clear_bss:
+	mov.l	end_addr, r1
+	mov.l	bss_start_addr, r2
+	mov	#0, r0
+l1:
+	mov.l	r0, @-r1
+	cmp/eq	r1,r2
+	bf	l1
+
+	/* Set the initial pointer. */
+	mov.l	init_stack_addr, r0
+	mov.l	@r0, r15
+
+	/* Decompress the kernel */
+	mov.l	decompress_kernel_addr, r0
+	jsr	@r0
+	nop
+
+	/* Jump to the start of the decompressed kernel */
+	mov.l	kernel_start_addr, r0
+	jmp	@r0
+	nop
+	
+	.align	2
+bss_start_addr:
+	.long	__bss_start
+end_addr:
+	.long	_end
+init_sr:
+	.long	0x500000F0	/* Privileged mode, Bank=0, Block=1, IMASK=0xF */
+kexec_magic:
+	.long	0x400000F0	/* magic used by kexec to parse zImage format */
+init_stack_addr:
+	.long	stack_start
+decompress_kernel_addr:
+	.long	decompress_kernel
+kernel_start_addr:
+#ifdef CONFIG_32BIT
+	.long	___pa(_text+PAGE_SIZE)
+#else
+	.long	_text+PAGE_SIZE
+#endif
+
+	.align	9
+fake_headers_as_bzImage:
+	.word	0
+	.ascii	"HdrS"		! header signature
+	.word	0x0202		! header version number (>= 0x0105)
+				! or else old loadlin-1.5 will fail)
+	.word	0		! default_switch
+	.word	0		! SETUPSEG
+	.word	0x1000
+	.word	0		! pointing to kernel version string
+	.byte	0		! = 0, old one (LILO, Loadlin,
+				! 0xTV: T=0 for LILO
+				!       V = version
+	.byte	1		! Load flags bzImage=1
+	.word	0x8000		! size to move, when setup is not
+	.long	0x100000	! 0x100000 = default for big kernel
+	.long	0		! address of loaded ramdisk image
+	.long	0		# its size in bytes
diff --git a/arch/sh/boot/compressed/head_64.S b/arch/sh/boot/compressed/head_64.S
new file mode 100644
index 000000000..9993113c6
--- /dev/null
+++ b/arch/sh/boot/compressed/head_64.S
@@ -0,0 +1,159 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * arch/shmedia/boot/compressed/head.S
+ *
+ * Copied from
+ *   arch/shmedia/kernel/head.S
+ * which carried the copyright:
+ *   Copyright (C) 2000, 2001  Paolo Alberelli
+ *
+ * Modification for compressed loader:
+ *   Copyright (C) 2002 Stuart Menefy (stuart.menefy@st.com)
+ */
+#include <asm/cache.h>
+#include <asm/tlb.h>
+#include <cpu/mmu_context.h>
+#include <cpu/registers.h>
+
+/*
+ * Fixed TLB entries to identity map the beginning of RAM
+ */
+#define MMUIR_TEXT_H	0x0000000000000003 | CONFIG_MEMORY_START
+			/* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */
+#define MMUIR_TEXT_L	0x000000000000009a | CONFIG_MEMORY_START
+			/* 512 Mb, Cacheable (Write-back), execute, Not User, Ph. Add. */
+
+#define MMUDR_CACHED_H	0x0000000000000003 | CONFIG_MEMORY_START
+			/* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */
+#define MMUDR_CACHED_L	0x000000000000015a | CONFIG_MEMORY_START
+			/* 512 Mb, Cacheable (Write-back), read/write, Not User, Ph. Add. */
+
+#define	ICCR0_INIT_VAL	ICCR0_ON | ICCR0_ICI		/* ICE + ICI */
+#define	ICCR1_INIT_VAL	ICCR1_NOLOCK			/* No locking */
+
+#define	OCCR0_INIT_VAL	OCCR0_ON | OCCR0_OCI | OCCR0_WB	/* OCE + OCI + WB */
+#define	OCCR1_INIT_VAL	OCCR1_NOLOCK			/* No locking */
+
+	.text
+
+	.global	startup
+startup:
+	/*
+	 * Prevent speculative fetch on device memory due to
+	 * uninitialized target registers.
+	 * This must be executed before the first branch.
+	 */
+	ptabs/u	r63, tr0
+	ptabs/u	r63, tr1
+	ptabs/u	r63, tr2
+	ptabs/u	r63, tr3
+	ptabs/u	r63, tr4
+	ptabs/u	r63, tr5
+	ptabs/u	r63, tr6
+	ptabs/u	r63, tr7
+	synci
+
+	/*
+	 * Set initial TLB entries for cached and uncached regions.
+	 * Note: PTA/BLINK is PIC code, PTABS/BLINK isn't !
+	 */
+	/* Clear ITLBs */
+	pta	1f, tr1
+	movi	ITLB_FIXED, r21
+	movi	ITLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22
+1:	putcfg	r21, 0, r63		/* Clear MMUIR[n].PTEH.V */
+	addi	r21, TLB_STEP, r21
+        bne	r21, r22, tr1
+
+	/* Clear DTLBs */
+	pta	1f, tr1
+	movi	DTLB_FIXED, r21
+	movi	DTLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22
+1:	putcfg	r21, 0, r63		/* Clear MMUDR[n].PTEH.V */
+	addi	r21, TLB_STEP, r21
+        bne	r21, r22, tr1
+
+	/* Map one big (512Mb) page for ITLB */
+	movi	ITLB_FIXED, r21
+	movi	MMUIR_TEXT_L, r22	/* PTEL first */
+	putcfg	r21, 1, r22		/* Set MMUIR[0].PTEL */
+	movi	MMUIR_TEXT_H, r22	/* PTEH last */
+	putcfg	r21, 0, r22		/* Set MMUIR[0].PTEH */
+
+	/* Map one big CACHED (512Mb) page for DTLB */
+	movi	DTLB_FIXED, r21
+	movi	MMUDR_CACHED_L, r22	/* PTEL first */
+	putcfg	r21, 1, r22		/* Set MMUDR[0].PTEL */
+	movi	MMUDR_CACHED_H, r22	/* PTEH last */
+	putcfg	r21, 0, r22		/* Set MMUDR[0].PTEH */
+
+	/* ICache */
+	movi	ICCR_BASE, r21
+	movi	ICCR0_INIT_VAL, r22
+	movi	ICCR1_INIT_VAL, r23
+	putcfg	r21, ICCR_REG0, r22
+	putcfg	r21, ICCR_REG1, r23
+	synci
+
+	/* OCache */
+	movi	OCCR_BASE, r21
+	movi	OCCR0_INIT_VAL, r22
+	movi	OCCR1_INIT_VAL, r23
+	putcfg	r21, OCCR_REG0, r22
+	putcfg	r21, OCCR_REG1, r23
+	synco
+
+	/*
+	 * Enable the MMU.
+	 * From here-on code can be non-PIC.
+	 */
+	movi	SR_HARMLESS | SR_ENABLE_MMU, r22
+	putcon	r22, SSR
+	movi	1f, r22
+	putcon	r22, SPC
+	synco
+	rte				/* And now go into the hyperspace ... */
+1:					/* ... that's the next instruction ! */
+
+	/* Set initial stack pointer */
+	movi	datalabel stack_start, r0
+	ld.l	r0, 0, r15
+
+	/*
+	 * Clear bss
+	 */
+	pt	1f, tr1
+	movi	datalabel __bss_start, r22
+	movi	datalabel _end, r23
+1:	st.l	r22, 0, r63
+	addi	r22, 4, r22
+	bne	r22, r23, tr1
+
+	/*
+	 * Decompress the kernel.
+	 */
+	pt	decompress_kernel, tr0
+	blink	tr0, r18
+
+	/*
+	 * Disable the MMU.
+	 */
+	movi	SR_HARMLESS, r22
+	putcon	r22, SSR
+	movi	1f, r22
+	putcon	r22, SPC
+	synco
+	rte				/* And now go into the hyperspace ... */
+1:					/* ... that's the next instruction ! */
+
+	/* Jump into the decompressed kernel */
+	movi	datalabel (CONFIG_MEMORY_START + 0x2000)+1, r19
+	ptabs	r19, tr0
+	blink	tr0, r18
+
+	/* Shouldn't return here, but just in case, loop forever */
+	pt	1f, tr0
+1:	blink	tr0, r63
diff --git a/arch/sh/boot/compressed/lshrsi3.S b/arch/sh/boot/compressed/lshrsi3.S
new file mode 100644
index 000000000..5a8281b7e
--- /dev/null
+++ b/arch/sh/boot/compressed/lshrsi3.S
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#include "../../lib/lshrsi3.S"
diff --git a/arch/sh/boot/compressed/misc.c b/arch/sh/boot/compressed/misc.c
new file mode 100644
index 000000000..ca05c99a3
--- /dev/null
+++ b/arch/sh/boot/compressed/misc.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/boot/compressed/misc.c
+ *
+ * This is a collection of several routines from gzip-1.0.3
+ * adapted for Linux.
+ *
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ *
+ * Adapted for SH by Stuart Menefy, Aug 1999
+ *
+ * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
+ */
+
+#include <linux/uaccess.h>
+#include <asm/addrspace.h>
+#include <asm/page.h>
+
+/*
+ * gzip declarations
+ */
+
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#define memzero(s, n)     memset ((s), 0, (n))
+
+/* cache.c */
+#define CACHE_ENABLE      0
+#define CACHE_DISABLE     1
+int cache_control(unsigned int command);
+
+extern char input_data[];
+extern int input_len;
+static unsigned char *output;
+
+static void error(char *m);
+
+int puts(const char *);
+
+extern int _text;		/* Defined in vmlinux.lds.S */
+extern int _end;
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+#ifdef CONFIG_HAVE_KERNEL_BZIP2
+#define HEAP_SIZE	0x400000
+#else
+#define HEAP_SIZE	0x10000
+#endif
+
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+int puts(const char *s)
+{
+	/* This should be updated to use the sh-sci routines */
+	return 0;
+}
+
+void* memset(void* s, int c, size_t n)
+{
+	int i;
+	char *ss = (char*)s;
+
+	for (i=0;i<n;i++) ss[i] = c;
+	return s;
+}
+
+void* memcpy(void* __dest, __const void* __src,
+			    size_t __n)
+{
+	int i;
+	char *d = (char *)__dest, *s = (char *)__src;
+
+	for (i=0;i<__n;i++) d[i] = s[i];
+	return __dest;
+}
+
+static void error(char *x)
+{
+	puts("\n\n");
+	puts(x);
+	puts("\n\n -- System halted");
+
+	while(1);	/* Halt */
+}
+
+const unsigned long __stack_chk_guard = 0x000a0dff;
+
+void __stack_chk_fail(void)
+{
+	error("stack-protector: Kernel stack is corrupted\n");
+}
+
+/* Needed because vmlinux.lds.h references this */
+void ftrace_stub(void)
+{
+}
+void arch_ftrace_ops_list_func(void)
+{
+}
+
+#define stackalign	4
+
+#define STACK_SIZE (4096)
+long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE];
+long *stack_start = &user_stack[STACK_SIZE];
+
+void decompress_kernel(void)
+{
+	unsigned long output_addr;
+
+	output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
+#if defined(CONFIG_29BIT)
+	output_addr |= P2SEG;
+#endif
+
+	output = (unsigned char *)output_addr;
+	free_mem_ptr = (unsigned long)&_end;
+	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+	puts("Uncompressing Linux... ");
+	cache_control(CACHE_ENABLE);
+	__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
+	cache_control(CACHE_DISABLE);
+	puts("Ok, booting the kernel.\n");
+}
diff --git a/arch/sh/boot/compressed/vmlinux.scr b/arch/sh/boot/compressed/vmlinux.scr
new file mode 100644
index 000000000..dd292b4b9
--- /dev/null
+++ b/arch/sh/boot/compressed/vmlinux.scr
@@ -0,0 +1,10 @@
+SECTIONS
+{
+  .rodata..compressed : ALIGN(8) {
+	input_len = .;
+	LONG(input_data_end - input_data) input_data = .;
+	*(.data)
+	output_len = . - 4;
+	input_data_end = .;
+	}
+}
diff --git a/arch/sh/boot/dts/Makefile b/arch/sh/boot/dts/Makefile
new file mode 100644
index 000000000..4a6dec971
--- /dev/null
+++ b/arch/sh/boot/dts/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_USE_BUILTIN_DTB) += $(addsuffix .dtb.o, $(CONFIG_BUILTIN_DTB_SOURCE))
diff --git a/arch/sh/boot/dts/j2_mimas_v2.dts b/arch/sh/boot/dts/j2_mimas_v2.dts
new file mode 100644
index 000000000..fa9562f78
--- /dev/null
+++ b/arch/sh/boot/dts/j2_mimas_v2.dts
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+/ {
+	compatible = "jcore,j2-soc";
+	model = "J2 FPGA SoC on Mimas v2 board";
+
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	interrupt-parent = <&aic>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "jcore,j2";
+			reg = <0>;
+			clock-frequency = <50000000>;
+			d-cache-size = <8192>;
+			i-cache-size = <8192>;
+			d-cache-block-size = <16>;
+			i-cache-block-size = <16>;
+		};
+	};
+
+	memory@10000000 {
+		device_type = "memory";
+		reg = <0x10000000 0x4000000>;
+	};
+
+	aliases {
+		serial0 = &uart0;
+		spi0 = &spi0;
+	};
+
+	chosen {
+		stdout-path = "serial0";
+	};
+
+	soc@abcd0000 {
+		compatible = "simple-bus";
+		ranges = <0 0xabcd0000 0x100000>;
+
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		aic: interrupt-controller@200 {
+			compatible = "jcore,aic1";
+			reg = <0x200 0x10>;
+			interrupt-controller;
+			#interrupt-cells = <1>;
+		};
+
+		cache-controller@c0 {
+			compatible = "jcore,cache";
+			reg = <0xc0 4>;
+		};
+
+		timer@200 {
+			compatible = "jcore,pit";
+			reg = <0x200 0x30>;
+			interrupts = <0x48>;
+		};
+
+		spi0: spi@40 {
+			compatible = "jcore,spi2";
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			spi-max-frequency = <25000000>;
+
+			reg = <0x40 0x8>;
+
+			sdcard@0 {
+				compatible = "mmc-spi-slot";
+				reg = <0>;
+				spi-max-frequency = <25000000>;
+				voltage-ranges = <3200 3400>;
+				mode = <0>;
+			};
+		};
+
+		uart0: serial@100 {
+			clock-frequency = <125000000>;
+			compatible = "xlnx,xps-uartlite-1.00.a";
+			current-speed = <19200>;
+			xlnx,use-parity = <0>;
+			xlnx,data-bits = <8>;
+			device_type = "serial";
+			interrupts = <0x12>;
+			port-number = <0>;
+			reg = <0x100 0x10>;
+		};
+	};
+};
diff --git a/arch/sh/boot/romimage/Makefile b/arch/sh/boot/romimage/Makefile
new file mode 100644
index 000000000..c7c8be584
--- /dev/null
+++ b/arch/sh/boot/romimage/Makefile
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# linux/arch/sh/boot/romimage/Makefile
+#
+# create an romImage file suitable for burning to flash/mmc from zImage
+#
+
+targets		:= vmlinux head.o zeropage.bin piggy.o
+load-y		:= 0
+
+mmcif-load-$(CONFIG_CPU_SUBTYPE_SH7724)	:= 0xe5200000 # ILRAM
+mmcif-obj-$(CONFIG_CPU_SUBTYPE_SH7724)	:= $(obj)/mmcif-sh7724.o
+load-$(CONFIG_ROMIMAGE_MMCIF)		:= $(mmcif-load-y)
+obj-$(CONFIG_ROMIMAGE_MMCIF)		:= $(mmcif-obj-y)
+
+LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(load-y) -e romstart \
+		   -T $(obj)/../../kernel/vmlinux.lds
+
+$(obj)/vmlinux: $(obj)/head.o $(obj-y) $(obj)/piggy.o FORCE
+	$(call if_changed,ld)
+
+OBJCOPYFLAGS += -j .empty_zero_page
+
+$(obj)/zeropage.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/zeropage.bin arch/sh/boot/zImage FORCE
+	$(call if_changed,ld)
diff --git a/arch/sh/boot/romimage/head.S b/arch/sh/boot/romimage/head.S
new file mode 100644
index 000000000..81a0652a3
--- /dev/null
+++ b/arch/sh/boot/romimage/head.S
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  linux/arch/sh/boot/romimage/head.S
+ *
+ * Board specific setup code, executed before zImage loader
+ */
+
+.text
+	#include <asm/page.h>
+
+	.global	romstart
+romstart:
+	/* include board specific setup code */
+#include <mach/romimage.h>
+
+#ifdef CONFIG_ROMIMAGE_MMCIF
+	/* load the romImage to above the empty zero page */
+	mov.l	empty_zero_page_dst, r4
+	mov.l	empty_zero_page_dst_adj, r5
+	add	r5, r4
+	mov.l	bytes_to_load, r5
+	mov.l	loader_function, r7
+	jsr	@r7
+	 mov	r4, r15
+
+	mov.l	empty_zero_page_dst, r4
+	mov.l	empty_zero_page_dst_adj, r5
+	add	r5, r4
+	mov.l	loaded_code_offs, r5
+	add	r5, r4
+	jmp	@r4
+	 nop
+
+	.balign 4
+empty_zero_page_dst_adj:
+	.long	PAGE_SIZE
+bytes_to_load:
+	.long	end_data - romstart
+loader_function:
+	.long	mmcif_loader
+loaded_code_offs:
+	.long	loaded_code - romstart
+loaded_code:
+#endif /* CONFIG_ROMIMAGE_MMCIF */
+
+	/* copy the empty_zero_page contents to where vmlinux expects it */
+	mova	extra_data_pos, r0
+	mov.l	extra_data_size, r1
+	add	r1, r0
+	mov.l	empty_zero_page_dst, r1
+	mov	#(PAGE_SHIFT - 4), r4
+	mov	#1, r3
+	shld	r4, r3 /* r3 = PAGE_SIZE / 16 */
+
+1:
+	mov.l	@r0, r4
+	mov.l	@(4, r0), r5
+	mov.l	@(8, r0), r6
+	mov.l	@(12, r0), r7
+	add	#16,r0
+	mov.l	r4, @r1
+	mov.l	r5, @(4, r1)
+	mov.l	r6, @(8, r1)
+	mov.l	r7, @(12, r1)
+	dt	r3
+	add	#16,r1
+	bf	1b
+
+	/* jump to the zImage entry point located after the zero page data */
+	mov	#PAGE_SHIFT, r4
+	mov	#1, r1
+	shld	r4, r1
+	mova	extra_data_pos, r0
+	add	r1, r0
+	mov.l	extra_data_size, r1
+	add	r1, r0
+	jmp	@r0
+	 nop
+
+	.align 2
+empty_zero_page_dst:
+	.long	_text
+extra_data_pos:
+extra_data_size:
+	.long	zero_page_pos - extra_data_pos
diff --git a/arch/sh/boot/romimage/mmcif-sh7724.c b/arch/sh/boot/romimage/mmcif-sh7724.c
new file mode 100644
index 000000000..d30123d85
--- /dev/null
+++ b/arch/sh/boot/romimage/mmcif-sh7724.c
@@ -0,0 +1,78 @@
+/*
+ * sh7724 MMCIF loader
+ *
+ * Copyright (C) 2010 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/platform_data/sh_mmcif.h>
+#include <mach/romimage.h>
+
+#define MMCIF_BASE      (void __iomem *)0xa4ca0000
+
+#define MSTPCR2		0xa4150038
+#define PTWCR		0xa4050146
+#define PTXCR		0xa4050148
+#define PSELA		0xa405014e
+#define PSELE		0xa4050156
+#define HIZCRC		0xa405015c
+#define DRVCRA		0xa405018a
+
+enum {
+	MMCIF_PROGRESS_ENTER,
+	MMCIF_PROGRESS_INIT,
+	MMCIF_PROGRESS_LOAD,
+	MMCIF_PROGRESS_DONE
+};
+
+/* SH7724 specific MMCIF loader
+ *
+ * loads the romImage from an MMC card starting from block 512
+ * use the following line to write the romImage to an MMC card
+ * # dd if=arch/sh/boot/romImage of=/dev/sdx bs=512 seek=512
+ */
+asmlinkage void mmcif_loader(unsigned char *buf, unsigned long no_bytes)
+{
+	mmcif_update_progress(MMCIF_PROGRESS_ENTER);
+
+	/* enable clock to the MMCIF hardware block */
+	__raw_writel(__raw_readl(MSTPCR2) & ~0x20000000, MSTPCR2);
+
+	/* setup pins D7-D0 */
+	__raw_writew(0x0000, PTWCR);
+
+	/* setup pins MMC_CLK, MMC_CMD */
+	__raw_writew(__raw_readw(PTXCR) & ~0x000f, PTXCR);
+
+	/* select D3-D0 pin function */
+	__raw_writew(__raw_readw(PSELA) & ~0x2000, PSELA);
+
+	/* select D7-D4 pin function */
+	__raw_writew(__raw_readw(PSELE) & ~0x3000, PSELE);
+
+	/* disable Hi-Z for the MMC pins */
+	__raw_writew(__raw_readw(HIZCRC) & ~0x0620, HIZCRC);
+
+	/* high drive capability for MMC pins */
+	__raw_writew(__raw_readw(DRVCRA) | 0x3000, DRVCRA);
+
+	mmcif_update_progress(MMCIF_PROGRESS_INIT);
+
+	/* setup MMCIF hardware */
+	sh_mmcif_boot_init(MMCIF_BASE);
+
+	mmcif_update_progress(MMCIF_PROGRESS_LOAD);
+
+	/* load kernel via MMCIF interface */
+	sh_mmcif_boot_do_read(MMCIF_BASE, 512,
+	                      (no_bytes + SH_MMCIF_BBS - 1) / SH_MMCIF_BBS,
+			      buf);
+
+	/* disable clock to the MMCIF hardware block */
+	__raw_writel(__raw_readl(MSTPCR2) | 0x20000000, MSTPCR2);
+
+	mmcif_update_progress(MMCIF_PROGRESS_DONE);
+}
diff --git a/arch/sh/boot/romimage/vmlinux.scr b/arch/sh/boot/romimage/vmlinux.scr
new file mode 100644
index 000000000..590394e2f
--- /dev/null
+++ b/arch/sh/boot/romimage/vmlinux.scr
@@ -0,0 +1,8 @@
+SECTIONS
+{
+  .text : {
+	zero_page_pos = .;
+	*(.data)
+	end_data = .;
+	}
+}