diff options
Diffstat (limited to 'scripts/Makefile.lib')
| -rw-r--r-- | scripts/Makefile.lib | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 2f5e28cac3..ef116e0e0a 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -395,11 +395,22 @@ $(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_free # ACPI # --------------------------------------------------------------------------- +# +# This first sends the file (typically dsdt.asl) through the preprocessor +# resolve includes and any CONFIG options used. This produces dsdt.asl.tmp +# which is pure ASL code. The Intel ASL (ACPI (Advanced Configuration and Power +# Interface) Source Language compiler (iasl) then converts this ASL code into a +# C file containing the hex data to build into U-Boot. This file is called +# dsdt.hex (despite us setting the prefix to .../dsdt.asl.tmp) so must be +# renamed to dsdt.c for consumption by the build system. +ASL_TMP = $(patsubst %.c,%.asl.tmp,$@) + quiet_cmd_acpi_c_asl= ASL $< cmd_acpi_c_asl= \ - $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -P $(UBOOTINCLUDE) -o $<.tmp $<; \ - iasl -p $< -tc $<.tmp $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \ - mv $(patsubst %.asl,%.hex,$<) $@ + $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -P $(UBOOTINCLUDE) \ + -o $(ASL_TMP) $< && \ + iasl -p $@ -tc $(ASL_TMP) $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \ + mv $(patsubst %.c,%.hex,$@) $@ $(obj)/dsdt.c: $(src)/dsdt.asl $(call cmd,acpi_c_asl) |