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| author | Mike Frysinger <vapier@gentoo.org> | 2011-05-07 17:55:04 -0400 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2011-07-12 02:17:45 -0400 |
| commit | fb5166ce35de489c8a96f3696e208eaae6a5a8d8 (patch) | |
| tree | 82f4ddc19fc7a05e6689722981a99445581f1b72 /arch/blackfin | |
| parent | 08a82a447b2a89d705edba952612d00c84129cb8 (diff) | |
| download | u-boot-imx-fb5166ce35de489c8a96f3696e208eaae6a5a8d8.zip u-boot-imx-fb5166ce35de489c8a96f3696e208eaae6a5a8d8.tar.gz u-boot-imx-fb5166ce35de489c8a96f3696e208eaae6a5a8d8.tar.bz2 | |
Blackfin: add init.elf helper code
This creates a standalone ELF that executes just the Blackfin initcode.
This is useful for people who want to program the low level aspects of
the CPU (memory/clocks/etc...) and can easily be used with JTAG for
quick booting while developing.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/cpu/.gitignore | 3 | ||||
| -rw-r--r-- | arch/blackfin/cpu/Makefile | 7 | ||||
| -rw-r--r-- | arch/blackfin/cpu/init.S | 9 | ||||
| -rw-r--r-- | arch/blackfin/cpu/init.lds.S | 25 |
4 files changed, 43 insertions, 1 deletions
diff --git a/arch/blackfin/cpu/.gitignore b/arch/blackfin/cpu/.gitignore index 0ec9d56..ba986d8 100644 --- a/arch/blackfin/cpu/.gitignore +++ b/arch/blackfin/cpu/.gitignore @@ -1 +1,4 @@ bootrom-asm-offsets.[chs] + +init.lds +init.elf diff --git a/arch/blackfin/cpu/Makefile b/arch/blackfin/cpu/Makefile index df10f1b..5deaa9e 100644 --- a/arch/blackfin/cpu/Makefile +++ b/arch/blackfin/cpu/Makefile @@ -13,7 +13,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(CPU).o -EXTRA := +EXTRA := init.elf CEXTRA := initcode.o SEXTRA := start.o SOBJS := interrupt.o cache.o @@ -61,6 +61,11 @@ ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS) fi endif +$(obj)init.lds: init.lds.S + $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P $^ -o $@ +$(obj)init.elf: $(obj)init.lds $(obj)init.o $(obj)initcode.o + $(LD) $(LDFLAGS) -T $^ -o $@ + ######################################################################### # defines $(obj).depend target diff --git a/arch/blackfin/cpu/init.S b/arch/blackfin/cpu/init.S new file mode 100644 index 0000000..f48c113 --- /dev/null +++ b/arch/blackfin/cpu/init.S @@ -0,0 +1,9 @@ +#include <asm/blackfin.h> +ENTRY(_start) + sp.l = LO(L1_SRAM_SCRATCH_END - 20); + sp.h = HI(L1_SRAM_SCRATCH_END - 20); + call _initcode; +1: + emuexcpt; + jump 1b; +END(_start) diff --git a/arch/blackfin/cpu/init.lds.S b/arch/blackfin/cpu/init.lds.S new file mode 100644 index 0000000..602e7c8 --- /dev/null +++ b/arch/blackfin/cpu/init.lds.S @@ -0,0 +1,25 @@ +/* + * linker script for simple init.elf + * + * Copyright (c) 2005-2011 Analog Device Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <config.h> +#include <asm/blackfin.h> +#undef ALIGN +#undef ENTRY + +OUTPUT_ARCH(bfin) + +MEMORY +{ + l1_code : ORIGIN = L1_INST_SRAM, LENGTH = L1_INST_SRAM_SIZE +} + +ENTRY(_start) +SECTIONS +{ + .text.l1 : { *(.text .text.*) } >l1_code +} |