From: Gabe Black gabeblack@chromium.org
When running from coreboot we don't want this code.
This version works by ifdef-ing out all of the code that would go into those sections and all the code that refers to it. The sections are then empty, and the linker will either leave them empty for the loader to ignore or remove them entirely.
Signed-off-by: Gabe Black gabeblack@chromium.org Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v3: - Fix incorrect repeated line in Makefile
Changes in v2: - Put CONFIG_NO_RESET_CODE into Makefile instead of source files
Makefile | 6 ++++-- arch/x86/cpu/Makefile | 5 ++++- arch/x86/cpu/u-boot.lds | 3 +++ 3 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile index 9dc89f9..e963bf2 100644 --- a/Makefile +++ b/Makefile @@ -231,8 +231,10 @@ endif
OBJS = $(CPUDIR)/start.o ifeq ($(CPU),x86) -OBJS += $(CPUDIR)/start16.o -OBJS += $(CPUDIR)/resetvec.o + ifneq ($(CONFIG_NO_RESET_CODE),y) + OBJS += $(CPUDIR)/start16.o + OBJS += $(CPUDIR)/resetvec.o + endif endif ifeq ($(CPU),ppc4xx) OBJS += $(CPUDIR)/resetvec.o diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile index 7f1fc18..1eb70a7 100644 --- a/arch/x86/cpu/Makefile +++ b/arch/x86/cpu/Makefile @@ -28,7 +28,10 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(CPU).o
-START = start.o start16.o resetvec.o +START = start.o +ifneq ($(CONFIG_NO_RESET_CODE),y) +START += resetvec.o start16.o +endif COBJS = interrupts.o cpu.o
SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/arch/x86/cpu/u-boot.lds b/arch/x86/cpu/u-boot.lds index a1ecefa..e20bb02 100644 --- a/arch/x86/cpu/u-boot.lds +++ b/arch/x86/cpu/u-boot.lds @@ -86,6 +86,8 @@ SECTIONS __bios_start = LOADADDR(.bios); __bios_size = SIZEOF(.bios);
+#ifndef CONFIG_NO_RESET_CODE + /* * The following expressions place the 16-bit Real-Mode code and * Reset Vector at the end of the Flash ROM @@ -95,4 +97,5 @@ SECTIONS
. = RESET_VEC_LOC; .resetvec : AT (CONFIG_SYS_TEXT_BASE + (CONFIG_SYS_MONITOR_LEN - RESET_SEG_SIZE + RESET_VEC_LOC)) { KEEP(*(.resetvec)); } +#endif }