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MIPS: Refactor load/entry address calculations 

The vmlinux load address and entry address is calculated in multiple
places:
 - arch/mips/Makefile defines load-y from CONFIG_PHYSICAL_START (or
   defined by the platform) and passes it to
   arch/mips/boot/compressed/Makefile.
 - arch/mips/boot/compressed/Makefile calculates kernel entry using nm.
 - arch/mips/lasat/image/Makefile calculates both load and entry address
   using nm.

Lets combine these in the main Makefile and then pass them as Make
parameters to each of the three boot image Makefiles (in boot/,
boot/compressed, lasat/image/). The boot/ Makefile doesn't currently use
them, but will soon need to for U-Boot image targets.

The existing load-y definition is used in preference to calculating the
load address using nm.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5794/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
James Hogan 2013-08-30 16:42:41 +01:00 committed by Ralf Baechle
parent 38d2d649be
commit 3185557d1a
3 changed files with 13 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/mips/Makefile
View File

@ -194,6 +194,8 @@ include $(srctree)/arch/mips/Kbuild.platforms
ifdef CONFIG_PHYSICAL_START
load-y = $(CONFIG_PHYSICAL_START)
endif
entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \
| grep "\bkernel_entry\b" | cut -f1 -d \ )
cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
drivers-$(CONFIG_PCI) += arch/mips/pci/
@ -225,6 +227,9 @@ KBUILD_CFLAGS += $(cflags-y)
KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
VMLINUX_ENTRY_ADDRESS=$(entry-y)
LDFLAGS += -m $(ld-emul)
ifdef CONFIG_CC_STACKPROTECTOR
@ -267,7 +272,8 @@ bootz-y += vmlinuz.srec
ifdef CONFIG_LASAT
rom.bin rom.sw: vmlinux
$(Q)$(MAKE) $(build)=arch/mips/lasat/image $@
$(Q)$(MAKE) $(build)=arch/mips/lasat/image \
$(bootvars-y) $@
endif
#
@ -292,12 +298,13 @@ all: $(all-y)
# boot
$(boot-y): $(vmlinux-32) FORCE
$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) arch/mips/boot/$@
$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
$(bootvars-y) arch/mips/boot/$@
# boot/compressed
$(bootz-y): $(vmlinux-32) FORCE
$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
VMLINUX_LOAD_ADDRESS=$(load-y) 32bit-bfd=$(32bit-bfd) $@
$(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
CLEAN_FILES += vmlinux.32 vmlinux.64

2
arch/mips/boot/compressed/Makefile
View File

@ -25,7 +25,7 @@ KBUILD_CFLAGS := $(LINUXINCLUDE) $(KBUILD_CFLAGS) -D__KERNEL__ \
KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
-DKERNEL_ENTRY=0x$(shell $(NM) $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | grep " kernel_entry" | cut -f1 -d \ )
-DKERNEL_ENTRY=$(VMLINUX_ENTRY_ADDRESS)
targets := head.o decompress.o dbg.o uart-16550.o uart-alchemy.o

6
arch/mips/lasat/image/Makefile
View File

@ -13,13 +13,11 @@ endif
MKLASATIMG = mklasatimg
MKLASATIMG_ARCH = mq2,mqpro,sp100,sp200
KERNEL_IMAGE = vmlinux
KERNEL_START = $(shell $(NM) $(KERNEL_IMAGE) | grep " _text" | cut -f1 -d\ )
KERNEL_ENTRY = $(shell $(NM) $(KERNEL_IMAGE) | grep kernel_entry | cut -f1 -d\ )
LDSCRIPT= -L$(srctree)/$(src) -Tromscript.normal
HEAD_DEFINES := -D_kernel_start=0x$(KERNEL_START) \
-D_kernel_entry=0x$(KERNEL_ENTRY) \
HEAD_DEFINES := -D_kernel_start=$(VMLINUX_LOAD_ADDRESS) \
-D_kernel_entry=$(VMLINUX_ENTRY_ADDRESS) \
-D VERSION="\"$(Version)\"" \
-D TIMESTAMP=$(shell date +%s)