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| author | Cédric Le Goater <clg@fr.ibm.com> | 2014-04-24 09:23:39 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-04-28 17:36:21 +1000 |
| commit | 147c05168fc86e824ccd1c0a02b40843e3cbca88 (patch) | |
| tree | b11fef2a92755918913b6c630d4fdb8f64af394a /arch/powerpc/boot/Makefile | |
| parent | 2d9afb369bc069f11a3a8696c4bdf95d4ddf1281 (diff) | |
| download | op-kernel-dev-147c05168fc86e824ccd1c0a02b40843e3cbca88.zip op-kernel-dev-147c05168fc86e824ccd1c0a02b40843e3cbca88.tar.gz | |
powerpc/boot: Add support for 64bit little endian wrapper
The code is only slightly modified : entry points now use the
FIXUP_ENDIAN trampoline to switch endian order. The 32bit wrapper
is kept for big endian kernels and 64bit is enforced for little
endian kernels with a PPC64_BOOT_WRAPPER config option.
The linker script is generated using the kernel preprocessor flags
to make use of the CONFIG_* definitions and the wrapper script is
modified to take into account the new elf64ppc format.
Finally, the zImage file is compiled as a position independent
executable (-pie) which makes it loadable at any address by the
firmware.
Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/boot/Makefile')
| -rw-r--r-- | arch/powerpc/boot/Makefile | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile index bed660d..a33c233 100644 --- a/arch/powerpc/boot/Makefile +++ b/arch/powerpc/boot/Makefile @@ -22,8 +22,14 @@ all: $(obj)/zImage BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -Os -msoft-float -pipe \ -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \ - -isystem $(shell $(CROSS32CC) -print-file-name=include) \ - -mbig-endian + -isystem $(shell $(CROSS32CC) -print-file-name=include) +ifdef CONFIG_PPC64_BOOT_WRAPPER +BOOTCFLAGS += -m64 +endif +ifdef CONFIG_CPU_BIG_ENDIAN +BOOTCFLAGS += -mbig-endian +endif + BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc ifdef CONFIG_DEBUG_INFO @@ -142,7 +148,11 @@ $(addprefix $(obj)/,$(libfdt) $(libfdtheader)): $(obj)/%: $(srctree)/scripts/dtc $(obj)/empty.c: @touch $@ -$(obj)/zImage.lds $(obj)/zImage.coff.lds $(obj)/zImage.ps3.lds: $(obj)/%: $(srctree)/$(src)/%.S +$(obj)/zImage.lds: $(obj)/%: $(srctree)/$(src)/%.S + $(CROSS32CC) $(cpp_flags) -E -Wp,-MD,$(depfile) -P -Upowerpc \ + -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< + +$(obj)/zImage.coff.lds $(obj)/zImage.ps3.lds : $(obj)/%: $(srctree)/$(src)/%.S @cp $< $@ clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \ |
