xtensa: drop CONFIG_EMBEDDED_RAMDISK

Remove Kconfig entries, boot subdirectory, dependencies from other
boot-* Makefiles, and sections from ld scripts.

Remove stale redboot code that used to pass initrd addresses in a3 and
a4 to _start.
Signed-off-by: NMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

arch/xtensa/Kconfig

@@ -227,23 +227,6 @@ source "drivers/Kconfig"
 
 source "fs/Kconfig"
 
-menu "Xtensa initrd options"
-	depends on BLK_DEV_INITRD
-
-config EMBEDDED_RAMDISK
-	bool "Embed root filesystem ramdisk into the kernel"
-
-config EMBEDDED_RAMDISK_IMAGE
-	string "Filename of gzipped ramdisk image"
-	depends on EMBEDDED_RAMDISK
-	default "ramdisk.gz"
-	help
-	  This is the filename of the ramdisk image to be built into the
-	  kernel.  Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
-	  The ramdisk image is not part of the kernel distribution; you must
-	  provide one yourself.
-endmenu
-
 source "arch/xtensa/Kconfig.debug"
 
 source "security/Kconfig"

arch/xtensa/Makefile

@@ -48,12 +48,6 @@ endif
 
 KBUILD_DEFCONFIG := iss_defconfig
 
-# ramdisk/initrd support
-# You need a compressed ramdisk image, named ramdisk.gz in
-# arch/xtensa/boot/ramdisk
-
-core-$(CONFIG_EMBEDDED_RAMDISK)	+= arch/xtensa/boot/ramdisk/
-
 # Test for cross compiling
 
 ifneq ($(VARIANT),)
@@ -87,7 +81,7 @@ all: zImage
 
 bzImage : zImage
 
-zImage zImage.initrd: vmlinux
+zImage: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $@
 
 define archhelp

arch/xtensa/boot/Makefile

@@ -25,7 +25,7 @@ bootdir-$(CONFIG_XTENSA_PLATFORM_ISS)	 += boot-elf
 bootdir-$(CONFIG_XTENSA_PLATFORM_XT2000) += boot-redboot boot-elf
 
 
-zImage zImage.initrd Image Image.initrd: $(bootdir-y)
+zImage Image: $(bootdir-y)
 
 $(bootdir-y): $(addprefix $(obj)/,$(subdir-y)) \
 	      $(addprefix $(obj)/,$(host-progs))

arch/xtensa/boot/boot-elf/Makefile

@@ -33,22 +33,5 @@ Image:	vmlinux.tmp $(OBJS) arch/$(ARCH)/boot/boot-elf/boot.lds
 		-T arch/$(ARCH)/boot/boot-elf/boot.lds \
 		-o arch/$(ARCH)/boot/$@.elf $@.tmp
 
-Image.initrd:	vmlinux $(OBJS)
-	$(OBJCOPY) --strip-all -R .comment -R .note.gnu.build-id -O binary \
-		--add-section .initrd=arch/$(ARCH)/boot/ramdisk \
-		--set-section-flags .initrd=contents,alloc,load,load,data \
-		vmlinux vmlinux.tmp
-	$(OBJCOPY) $(OBJCOPY_ARGS) -R .comment \
-		--add-section image=vmlinux.tmp \
-		--set-section-flags image=contents,alloc,load,load,data \
-		$(OBJS) $@.tmp
-	$(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) \
-		-T $(srctree)/arch/$(ARCH)/boot/boot-elf/boot.ld \
-		-o arch/$(ARCH)/boot/$@.elf $@.tmp
-#rm -f $@.tmp vmlinux.tmp
-
-
 zImage:	Image
 
-zImage.initrd:	Image.initrd
-

arch/xtensa/boot/boot-elf/boot.lds.S

@@ -33,13 +33,6 @@ SECTIONS
 
 	__reloc_end = . ;
 
-	.initrd ALIGN(0x10) :
-	{
-		boot_initrd_start = . ;
-		*(.initrd)
-		boot_initrd_end = .;
-	}
-
 	. = ALIGN(0x10);
 	__image_load = . ;
 	.image 0xd0001000:

arch/xtensa/boot/boot-redboot/boot.ld

@@ -31,13 +31,6 @@ SECTIONS
 
 	__reloc_end = . ;
 
-	.initrd ALIGN(0x10) :
-	{
-		boot_initrd_start = . ;
-		*(.initrd)
-		boot_initrd_end = .;
-	}
-
 	. = ALIGN(0x10);
 	__image_load = . ;
 	.image 0xd0001000: AT(__image_load)

arch/xtensa/boot/boot-redboot/bootstrap.S

@@ -226,17 +226,7 @@ _reloc:
 
 	isync
 
-	movi	a5, __start
-	movi	a3, boot_initrd_start
-	movi	a4, boot_initrd_end
-	sub	a3, a3, a5
-	sub	a4, a4, a5
-	add	a3, a0, a3
-	add	a4, a0, a4
-
 	# a2  Boot parameter list
-	# a3  initrd_start (virtual load address)
-	# a4  initrd_end   (virtual load address)
 
 	movi	a0, _image_start
 	jx	a0

arch/xtensa/boot/ramdisk/Makefile

-#
-# Makefile for a ramdisk image
-#
-
-BIG_ENDIAN	:= $(shell echo -e "\#ifdef __XTENSA_EL__\nint little;\n\#else\nint big;\n\#endif" | $(CC) -E -|grep -c big)
-
-ifeq ($(BIG_ENDIAN),1)
-OBJCOPY_ARGS    := -O elf32-xtensa-be
-else
-OBJCOPY_ARGS    := -O elf32-xtensa-le
-endif
-
-obj-y = ramdisk.o
-
-RAMDISK_IMAGE = arch/$(ARCH)/boot/ramdisk/$(CONFIG_EMBEDDED_RAMDISK_IMAGE)
-
-arch/$(ARCH)/boot/ramdisk/ramdisk.o:
-	$(Q)echo -e "dummy:" | $(AS) -o $@;
-	$(Q)$(OBJCOPY) $(OBJCOPY_ARGS)					    \
-		--add-section .initrd=$(RAMDISK_IMAGE)			    \
-		--set-section-flags .initrd=contents,alloc,load,load,data   \
-		arch/$(ARCH)/boot/ramdisk/ramdisk.o $@
-

arch/xtensa/configs/s6105_defconfig

@@ -540,11 +540,6 @@ CONFIG_MSDOS_PARTITION=y
 # CONFIG_NLS is not set
 # CONFIG_DLM is not set
 
-#
-# Xtensa initrd options
-#
-# CONFIG_EMBEDDED_RAMDISK is not set
-
 #
 # Kernel hacking
 #

arch/xtensa/kernel/setup.c

@@ -60,8 +60,6 @@ struct rtc_ops *rtc_ops;
 #ifdef CONFIG_BLK_DEV_INITRD
 extern void *initrd_start;
 extern void *initrd_end;
-extern void *__initrd_start;
-extern void *__initrd_end;
 int initrd_is_mapped = 0;
 extern int initrd_below_start_ok;
 #endif
@@ -79,10 +77,6 @@ static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
 
 sysmem_info_t __initdata sysmem;
 
-#ifdef CONFIG_BLK_DEV_INITRD
-int initrd_is_mapped;
-#endif
-
 #ifdef CONFIG_MMU
 extern void init_mmu(void);
 #else
@@ -197,12 +191,6 @@ static int __init parse_bootparam(const bp_tag_t* tag)
 
 void __init init_arch(bp_tag_t *bp_start)
 {
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	initrd_start = &__initrd_start;
-	initrd_end = &__initrd_end;
-#endif
-
 	sysmem.nr_banks = 0;
 
 #ifdef CONFIG_CMDLINE_BOOL

arch/xtensa/kernel/vmlinux.lds.S

@@ -222,11 +222,6 @@ SECTIONS
   . = ALIGN(0x10);
   .bootstrap : { *(.bootstrap.literal .bootstrap.text .bootstrap.data) }
 
-  . = ALIGN(0x1000);
-  __initrd_start = .;
-  .initrd : { *(.initrd) }
-  __initrd_end = .;
-
   .ResetVector.text XCHAL_RESET_VECTOR_VADDR :
   {
     *(.ResetVector.text)