parisc: Add core code for self-extracting kernel

image

bzImage

#

# Makefile for the linux parisc-specific parts of the boot image creator.

#

COMPILE_VERSION := __linux_compile_version_id__`hostname |  \

			tr -c '[0-9A-Za-z]' '_'`__`date | \

			tr -c '[0-9A-Za-z]' '_'`_t

ccflags-y  := -DCOMPILE_VERSION=$(COMPILE_VERSION) -gstabs -I.

targets := image

targets += bzImage

subdir- := compressed

$(obj)/image: vmlinux FORCE

	$(call if_changed,objcopy)

$(obj)/bzImage: $(obj)/compressed/vmlinux FORCE

	$(call if_changed,objcopy)

$(obj)/compressed/vmlinux: FORCE

	$(Q)$(MAKE) $(build)=$(obj)/compressed $@

install: $(CONFIGURE) $(obj)/bzImage

	sh -x  $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \

	      System.map "$(INSTALL_PATH)"

sizes.h

vmlinux

vmlinux.lds

#

# linux/arch/parisc/boot/compressed/Makefile

#

# create a compressed self-extracting vmlinux image from the original vmlinux

#

KCOV_INSTRUMENT := n

GCOV_PROFILE := n

UBSAN_SANITIZE := n

targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2

targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4

targets += misc.o piggy.o sizes.h head.o real2.o firmware.o

KBUILD_CFLAGS := -D__KERNEL__ -O2 -DBOOTLOADER

KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING

KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks

KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs

ifndef CONFIG_64BIT

KBUILD_CFLAGS += -mfast-indirect-calls

endif

OBJECTS += $(obj)/head.o $(obj)/real2.o $(obj)/firmware.o $(obj)/misc.o $(obj)/piggy.o

# LDFLAGS_vmlinux := -X --whole-archive -e startup -T

LDFLAGS_vmlinux := -X -e startup --as-needed -T

$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS) $(LIBGCC)

	$(call if_changed,ld)

sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\|parisc_kernel_start\)$$/\#define SZ\2 0x\1/p'

quiet_cmd_sizes = GEN $@

      cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@

$(obj)/sizes.h: vmlinux

	$(call if_changed,sizes)

AFLAGS_head.o += -I$(objtree)/$(obj) -DBOOTLOADER

$(obj)/head.o: $(obj)/sizes.h

CFLAGS_misc.o += -I$(objtree)/$(obj)

$(obj)/misc.o: $(obj)/sizes.h

$(obj)/firmware.o: $(obj)/firmware.c

$(obj)/firmware.c: $(srctree)/arch/$(SRCARCH)/kernel/firmware.c

	$(call cmd,shipped)

AFLAGS_real2.o += -DBOOTLOADER

$(obj)/real2.o: $(obj)/real2.S

$(obj)/real2.S: $(srctree)/arch/$(SRCARCH)/kernel/real2.S

	$(call cmd,shipped)

$(obj)/misc.o: $(obj)/sizes.h

CPPFLAGS_vmlinux.lds += -I$(objtree)/$(obj) -DBOOTLOADER

$(obj)/vmlinux.lds: $(obj)/sizes.h

OBJCOPYFLAGS_vmlinux.bin := -O binary -R .comment -S

$(obj)/vmlinux.bin: vmlinux

	$(call if_changed,objcopy)

vmlinux.bin.all-y := $(obj)/vmlinux.bin

suffix-$(CONFIG_KERNEL_GZIP)  := gz

suffix-$(CONFIG_KERNEL_BZIP2) := bz2

suffix-$(CONFIG_KERNEL_LZ4)  := lz4

suffix-$(CONFIG_KERNEL_LZMA)  := lzma

suffix-$(CONFIG_KERNEL_LZO)  := lzo

suffix-$(CONFIG_KERNEL_XZ)  := xz

$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y)

	$(call if_changed,gzip)

$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y)

	$(call if_changed,bzip2)

$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y)

	$(call if_changed,lz4)

$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)

	$(call if_changed,lzma)

$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)

	$(call if_changed,lzo)

$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y)

	$(call if_changed,xzkern)

LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T

$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y)

	$(call if_changed,ld)

/*

 * Startup glue code to uncompress the kernel

 *

 *   (C) 2017 Helge Deller <deller@gmx.de>

 */

#include <linux/init.h>

#include <linux/linkage.h>

#include <asm/asm-offsets.h>

#include <asm/page.h>

#include <asm/psw.h>

#include <asm/pdc.h>

#include <asm/assembly.h>

#include "sizes.h"

#define BOOTADDR(x)	(x)

#ifndef CONFIG_64BIT

	.import	$global$		/* forward declaration */

#endif /*!CONFIG_64BIT*/

	__HEAD

ENTRY(startup)

	 .level LEVEL

#define PSW_W_SM	0x200

#define PSW_W_BIT       36

	;! nuke the W bit, saving original value

	.level 2.0

	rsm	PSW_W_SM, %r1

	.level 1.1

	extrw,u	%r1, PSW_W_BIT-32, 1, %r1

	copy	%r1, %arg0

	/* Make sure sr4-sr7 are set to zero for the kernel address space */

	mtsp    %r0,%sr4

	mtsp    %r0,%sr5

	mtsp    %r0,%sr6

	mtsp    %r0,%sr7

	/* Clear BSS */

	.import _bss,data

	.import _ebss,data

	load32	BOOTADDR(_bss),%r3

	load32	BOOTADDR(_ebss),%r4

	ldo	FRAME_SIZE(%r4),%sp	/* stack at end of bss */

$bss_loop:

	cmpb,<<,n %r3,%r4,$bss_loop

	stw,ma	%r0,4(%r3)

	/* Initialize the global data pointer */

	loadgp

	/* arg0..arg4 were set by palo. */

	copy	%arg1, %r6		/* command line */

	copy	%arg2, %r7		/* rd-start */

	copy	%arg3, %r8		/* rd-end */

	load32	BOOTADDR(decompress_kernel),%r3

#ifdef CONFIG_64BIT

	.level LEVEL

	ssm	PSW_W_SM, %r0		/* set W-bit */

	depdi	0, 31, 32, %r3

#endif

	load32	BOOTADDR(startup_continue), %r2

	bv,n	0(%r3)

startup_continue:

#ifdef CONFIG_64BIT

	.level LEVEL

	rsm	PSW_W_SM, %r0		/* clear W-bit */

#endif

	load32	KERNEL_BINARY_TEXT_START, %arg0 /* free mem */

	copy	%r6, %arg1		/* command line */

	copy	%r7, %arg2		/* rd-start */

	copy	%r8, %arg3		/* rd-end */

	bv,n	0(%ret0)

END(startup)