jcs.org
"Das U-Boot" Source Tree
1# SPDX-License-Identifier: GPL-2.0
2# Backward compatibility
3asflags-y += $(EXTRA_AFLAGS)
4ccflags-y += $(EXTRA_CFLAGS)
5cppflags-y += $(EXTRA_CPPFLAGS)
6ldflags-y += $(EXTRA_LDFLAGS)
7
8#
9# flags that take effect in sub directories
10export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
11export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y)
12
13# Figure out what we need to build from the various variables
14# ===========================================================================
15
16# When an object is listed to be built compiled-in and modular,
17# only build the compiled-in version
18
19obj-m := $(filter-out $(obj-y),$(obj-m))
20
21# Libraries are always collected in one lib file.
22# Filter out objects already built-in
23
24lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
25
26
27# Handle objects in subdirs
28# ---------------------------------------------------------------------------
29# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
30# and add the directory to the list of dirs to descend into: $(subdir-y)
31# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
32# and add the directory to the list of dirs to descend into: $(subdir-m)
33
34# Determine modorder.
35# Unfortunately, we don't have information about ordering between -y
36# and -m subdirs. Just put -y's first.
37modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
38
39__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
40subdir-y += $(__subdir-y)
41__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
42subdir-m += $(__subdir-m)
43obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
44obj-m := $(filter-out %/, $(obj-m))
45
46# Subdirectories we need to descend into
47
48subdir-ym := $(sort $(subdir-y) $(subdir-m))
49
50# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
51suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
52# List composite targets that are constructed by combining other targets
53multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m)))
54# List primitive targets that are compiled from source files
55real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m))
56
57# if $(foo-objs) exists, foo.o is a composite object
58multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
59multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
60multi-used := $(multi-used-y) $(multi-used-m)
61single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
62
63# Build list of the parts of our composite objects, our composite
64# objects depend on those (obviously)
65multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
66multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
67
68# Composite DTB (i.e. DTB constructed by overlay)
69multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs)
70# Primitive DTB compiled from *.dts
71real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs)
72# Base DTB that overlay is applied onto (each first word of $(*-dtbs) expansion)
73base-dtb-y := $(foreach m, $(multi-dtb-y), $(firstword $(call suffix-search, $m, .dtb, -dtbs)))
74
75# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
76# tell kbuild to descend
77subdir-obj-y := $(filter %/built-in.o, $(obj-y))
78
79# Replace multi-part objects by their individual parts, look at local dir only
80real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
81real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
82
83# Add subdir path
84
85extra-y := $(addprefix $(obj)/,$(extra-y))
86always-y := $(addprefix $(obj)/,$(always-y))
87always := $(addprefix $(obj)/,$(always))
88targets := $(addprefix $(obj)/,$(targets))
89modorder := $(addprefix $(obj)/,$(modorder))
90obj-y := $(addprefix $(obj)/,$(obj-y))
91obj-m := $(addprefix $(obj)/,$(obj-m))
92lib-y := $(addprefix $(obj)/,$(lib-y))
93subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
94real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
95real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
96single-used-m := $(addprefix $(obj)/,$(single-used-m))
97multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
98multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
99multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
100multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
101multi-dtb-y := $(addprefix $(obj)/,$(multi-dtb-y))
102real-dtb-y := $(addprefix $(obj)/,$(real-dtb-y))
103subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
104
105# These flags are needed for modversions and compiling, so we define them here
106# already
107# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
108# end up in (or would, if it gets compiled in)
109# Note: Files that end up in two or more modules are compiled without the
110# KBUILD_MODNAME definition. The reason is that any made-up name would
111# differ in different configs.
112name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
113basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
114modname_flags = $(if $(filter 1,$(words $(modname))),\
115 -DKBUILD_MODNAME=$(call name-fix,$(modname)))
116
117orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
118 $(ccflags-y) $(CFLAGS_$(basetarget).o)
119_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
120orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
121 $(asflags-y) $(AFLAGS_$(basetarget).o)
122_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
123_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
124
125#
126# Enable gcov profiling flags for a file, directory or for all files depending
127# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
128# (in this order)
129#
130ifeq ($(CONFIG_GCOV_KERNEL),y)
131_c_flags += $(if $(patsubst n%,, \
132 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
133 $(CFLAGS_GCOV))
134endif
135
136#
137# Enable address sanitizer flags for kernel except some files or directories
138# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
139#
140ifeq ($(CONFIG_KASAN),y)
141_c_flags += $(if $(patsubst n%,, \
142 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
143 $(CFLAGS_KASAN))
144endif
145
146# If building the kernel in a separate objtree expand all occurrences
147# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
148
149ifeq ($(KBUILD_SRC),)
150__c_flags = $(_c_flags)
151__a_flags = $(_a_flags)
152__cpp_flags = $(_cpp_flags)
153else
154
155# -I$(obj) locates generated .h files
156# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
157# and locates generated .h files
158# FIXME: Replace both with specific CFLAGS* statements in the makefiles
159__c_flags = $(if $(obj),$(call addtree,-I$(src)) -I$(obj)) \
160 $(call flags,_c_flags)
161__a_flags = $(call flags,_a_flags)
162__cpp_flags = $(call flags,_cpp_flags)
163endif
164
165# Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
166c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
167 $(__c_flags) $(modkern_cflags) \
168 $(basename_flags) $(modname_flags)
169
170a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
171 $(__a_flags) $(modkern_aflags)
172
173cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
174 $(__cpp_flags)
175
176ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
177
178# Try these files in order to find the U-Boot-specific .dtsi include file
179u_boot_dtsi_loc = $(srctree)/arch/$(ARCH)/dts/
180
181u_boot_dtsi_options = $(strip $(wildcard $(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi) \
182 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \
183 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \
184 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \
185 $(wildcard $(u_boot_dtsi_loc)u-boot.dtsi))
186
187u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \
188 $(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi \
189 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \
190 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \
191 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \
192 $(u_boot_dtsi_loc)u-boot.dtsi ... \
193 found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!))
194
195# Uncomment for debugging
196# This shows all the files that were considered and the one that we chose.
197ifdef DEVICE_TREE_DEBUG
198u_boot_dtsi_options_debug = $(warning $(u_boot_dtsi_options_raw))
199endif
200
201# We use the first match to be included
202dtsi_include_list = $(strip $(u_boot_dtsi_options_debug) \
203 $(notdir $(firstword $(u_boot_dtsi_options))))
204
205# Modified for U-Boot
206upstream_dtsi_include = $(addprefix -I, $(srctree)/dts/upstream/src/ \
207 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/$(ARCH)/*/*))) \
208 $(if (CONFIG_ARM64), \
209 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/arm64/*/*)))))
210dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
211 $(UBOOTINCLUDE) \
212 -I$(dir $<) \
213 -I$(u_boot_dtsi_loc) \
214 -I$(srctree)/arch/$(ARCH)/dts/include \
215 -I$(srctree)/include \
216 $(upstream_dtsi_include) \
217 -D__ASSEMBLY__ \
218 -undef -D__DTS__
219
220# Finds the multi-part object the current object will be linked into
221modname-multi = $(sort $(foreach m,$(multi-used),\
222 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
223
224# Useful for describing the dependency of composite objects
225# Usage:
226# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
227define multi_depend
228$(foreach m, $(notdir $1), \
229 $(eval $(obj)/$m: \
230 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
231endef
232
233# LEX
234# ---------------------------------------------------------------------------
235quiet_cmd_flex = LEX $@
236 cmd_flex = $(LEX) -o$@ -L $<
237
238$(obj)/%.lex.c: $(src)/%.l FORCE
239 $(call if_changed,flex)
240
241# YACC
242# ---------------------------------------------------------------------------
243quiet_cmd_bison = YACC $@
244 cmd_bison = $(YACC) -o$@ -t -l $<
245
246$(obj)/%.tab.c: $(src)/%.y FORCE
247 $(call if_changed,bison)
248
249quiet_cmd_bison_h = YACC $@
250 cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $<
251
252$(obj)/%.tab.h: $(src)/%.y FORCE
253 $(call if_changed,bison_h)
254
255# Shipped files
256# ===========================================================================
257
258quiet_cmd_shipped = SHIPPED $@
259cmd_shipped = cat $< > $@
260
261$(obj)/%: $(src)/%_shipped
262 $(call cmd,shipped)
263
264# Commands useful for building a boot image
265# ===========================================================================
266#
267# Use as following:
268#
269# target: source(s) FORCE
270# $(if_changed,ld/objcopy/gzip)
271#
272# and add target to extra-y so that we know we have to
273# read in the saved command line
274
275# Linking
276# ---------------------------------------------------------------------------
277
278quiet_cmd_ld = LD $@
279cmd_ld = $(LD) $(ld_flags) $(filter-out FORCE,$^) -o $@
280
281# Objcopy
282# ---------------------------------------------------------------------------
283
284quiet_cmd_objcopy = OBJCOPY $@
285cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
286
287# Gzip
288# ---------------------------------------------------------------------------
289
290quiet_cmd_gzip = GZIP $@
291cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
292 (rm -f $@ ; false)
293
294# DTC
295# ---------------------------------------------------------------------------
296
297# Disable noisy checks by default
298ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
299DTC_FLAGS += -Wno-unit_address_vs_reg \
300 -Wno-unit_address_format \
301 -Wno-avoid_unnecessary_addr_size \
302 -Wno-alias_paths \
303 -Wno-graph_child_address \
304 -Wno-graph_port \
305 -Wno-unique_unit_address \
306 -Wno-simple_bus_reg \
307 -Wno-pci_device_reg
308
309# U-Boot specific disables
310DTC_FLAGS += -Wno-pci_bridge \
311 -Wno-pci_device_bus_num
312endif
313
314ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),)
315DTC_FLAGS += -Wnode_name_chars_strict \
316 -Wproperty_name_chars_strict
317endif
318
319DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
320
321# Set -@ if the target is a base DTB that overlay is applied onto
322DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@)
323
324# Generate an assembly file to wrap the output of the device tree compiler
325quiet_cmd_dt_S_dtb= DTBS $@
326# Modified for U-Boot
327cmd_dt_S_dtb= \
328( \
329 echo '.section .dtb.init.rodata,"a"'; \
330 echo '.balign 16'; \
331 echo '.global __dtb_$(subst -,_,$(*F))_begin'; \
332 echo '__dtb_$(subst -,_,$(*F))_begin:'; \
333 echo '.incbin "$<" '; \
334 echo '__dtb_$(subst -,_,$(*F))_end:'; \
335 echo '.global __dtb_$(subst -,_,$(*F))_end'; \
336 echo '.balign 16'; \
337) > $@
338
339$(obj)/%.dtb.S: $(obj)/%.dtb
340 $(call cmd,dt_S_dtb)
341
342# Generate an assembly file to wrap the output of the device tree compiler
343quiet_cmd_dt_S_dtbo= DTBOS $@
344# Modified for U-Boot
345cmd_dt_S_dtbo= \
346{ \
347 echo '.section .dtb.init.rodata,"a"'; \
348 echo '.balign 16'; \
349 echo '.global __dtbo_$(subst -,_,$(*F))_begin'; \
350 echo '__dtbo_$(subst -,_,$(*F))_begin:'; \
351 echo '.incbin "$<" '; \
352 echo '__dtbo_$(subst -,_,$(*F))_end:'; \
353 echo '.global __dtbo_$(subst -,_,$(*F))_end'; \
354 echo '.balign 16'; \
355} > $@
356
357$(obj)/%.dtbo.S: $(obj)/%.dtbo
358 $(call cmd,dt_S_dtbo)
359
360ifeq ($(CONFIG_OF_LIBFDT_OVERLAY),y)
361DTC_FLAGS += -@
362endif
363
364quiet_cmd_dtc = DTC $@
365# Modified for U-Boot
366# Bring in any U-Boot-specific include at the end of the file
367# And finally any custom .dtsi fragments specified with CONFIG_DEVICE_TREE_INCLUDES
368cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
369 (cat $< > $(pre-tmp)); \
370 $(foreach f,$(subst $(quote),,$(dtsi_include_list) $(CONFIG_DEVICE_TREE_INCLUDES)), \
371 echo '$(pound)include "$(f)"' >> $(pre-tmp);) \
372 $(HOSTCC) -E $(dtc_cpp_flags) -I$(obj) -x assembler-with-cpp -o $(dtc-tmp) $(pre-tmp) ; \
373 $(DTC) -O dtb -o $@ -b 0 \
374 -i $(dir $<) -i $(u_boot_dtsi_loc) $(DTC_FLAGS) \
375 -d $(depfile).dtc.tmp $(dtc-tmp) || \
376 (echo "Check $(shell pwd)/$(pre-tmp) for errors" && false) \
377 ; \
378 sed "s:$(pre-tmp):$(<):" $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
379
380dtsi_include_list_deps := $(addprefix $(u_boot_dtsi_loc),$(subst $(quote),,$(dtsi_include_list)))
381
382ifneq ($(CHECK_DTBS),)
383DT_CHECKER ?= dt-validate
384DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m)
385DT_BINDING_DIR := dts/upstream/Bindings
386DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json
387
388quiet_cmd_dtb = DTC_CHK $@
389 cmd_dtb = $(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true
390else
391quiet_cmd_dtb = $(quiet_cmd_dtc)
392 cmd_dtb = $(cmd_dtc)
393endif
394
395$(obj)/%.dtb: $(src)/%.dts $(DTC) $(dtsi_include_list_deps) $(DT_TMP_SCHEMA) FORCE
396 $(call if_changed_dep,dtb)
397
398pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp)
399dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
400
401# DTCO
402# ---------------------------------------------------------------------------
403
404quiet_cmd_dtco = DTCO $@
405# Rule for objects only; does not put specific u-boot include at the end
406# No generation of assembly file either
407# Modified for U-Boot
408cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
409 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
410 $(DTC) -@ -O dtb -o $@ -b 0 \
411 -i $(dir $<) $(DTC_FLAGS) \
412 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
413 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
414
415$(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE
416 $(call if_changed_dep,dtco)
417
418quiet_cmd_fdtoverlay = DTOVL $@
419 cmd_fdtoverlay = fdtoverlay -o $@ -i $(real-prereqs)
420
421$(multi-dtb-y): FORCE
422 $(call if_changed,fdtoverlay)
423$(call multi_depend, $(multi-dtb-y), .dtb, -dtbs)
424
425# Fonts
426# ---------------------------------------------------------------------------
427
428# Generate an assembly file to wrap the font data
429quiet_cmd_S_ttf= TTF $@
430# Modified for U-Boot
431cmd_S_ttf= \
432( \
433 echo '.section .rodata.ttf.init,"a"'; \
434 echo '.balign 16'; \
435 echo '.global __ttf_$(*F)_begin'; \
436 echo '__ttf_$(*F)_begin:'; \
437 echo '.incbin "$<" '; \
438 echo '__ttf_$(*F)_end:'; \
439 echo '.global __ttf_$(*F)_end'; \
440 echo '.balign 16'; \
441) > $@
442
443$(obj)/%.S: $(src)/%.ttf
444 $(call cmd,S_ttf)
445
446# Splash logos
447# ---------------------------------------------------------------------------
448
449# Generate an assembly file to wrap the splash data
450quiet_cmd_S_splash= TTF $@
451# Modified for U-Boot
452cmd_S_splash= \
453( \
454 echo '.section .rodata.splash.init,"a"'; \
455 echo '.balign 16'; \
456 echo '.global __splash_$(*F)_begin'; \
457 echo '__splash_$(*F)_begin:'; \
458 echo '.incbin "$<" '; \
459 echo '__splash_$(*F)_end:'; \
460 echo '.global __splash_$(*F)_end'; \
461 echo '.balign 16'; \
462) > $@
463
464$(obj)/%.S: $(src)/%.bmp
465 $(call cmd,S_splash)
466
467# EFI applications
468# A Makefile target *.efi is built as EFI application.
469# A Makefile target *_efi.S wraps *.efi as built-in EFI application.
470# ---------------------------------------------------------------------------
471
472# Generate an assembly file to wrap the EFI app
473cmd_S_efi= \
474( \
475 echo '.section .rodata.$*.init,"a"'; \
476 echo '.balign 16'; \
477 echo '.global __efi_$*_begin'; \
478 echo '__efi_$*_begin:'; \
479 echo '.incbin "$<" '; \
480 echo '__efi_$*_end:'; \
481 echo '.global __efi_$*_end'; \
482 echo '.balign 16'; \
483) > $@
484
485$(obj)/%_efi.S: $(obj)/%.efi
486 $(call cmd,S_efi)
487
488quiet_cmd_efi_objcopy = OBJCOPY $@
489cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data \
490 -j .dynamic -j .dynstr -j .dynsym -j .rel* -j .reloc \
491 $(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@
492
493$(obj)/%.efi: $(obj)/%_efi.so
494 $(call cmd,efi_objcopy)
495
496KBUILD_EFILDFLAGS = -nostdlib -zexecstack -znocombreloc -znorelro
497KBUILD_EFILDFLAGS += $(call ld-option,--no-warn-rwx-segments)
498quiet_cmd_efi_ld = LD $@
499cmd_efi_ld = $(LD) $(KBUILD_EFILDFLAGS) -L $(srctree) -T $(EFI_LDS_PATH) \
500 -shared -Bsymbolic -s $^ $(PLATFORM_LIBGCC) -o $@
501
502EFI_LDS_PATH = arch/$(ARCH)/lib/$(EFI_LDS)
503
504$(obj)/efi_crt0.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_CRT0:.o=.S) FORCE
505 $(call if_changed_dep,as_o_S)
506
507$(obj)/efi_reloc.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_RELOC:.o=.c) $(recordmcount_source) FORCE
508 $(call cmd,force_checksrc)
509 $(call if_changed_rule,cc_o_c)
510
511$(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o
512 $(call cmd,efi_ld)
513
514targets += $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o
515
516CFLAGS_REMOVE_efi_reloc.o := $(LTO_CFLAGS)
517CFLAGS_REMOVE_efi_freestanding.o := $(LTO_CFLAGS)
518
519# ACPI
520# ---------------------------------------------------------------------------
521#
522# This first sends the file (typically dsdt.asl) through the preprocessor
523# resolve includes and any CONFIG options used. This produces dsdt.asl.tmp
524# which is pure ASL code. The Intel ASL (ACPI (Advanced Configuration and Power
525# Interface) Source Language compiler (iasl) then converts this ASL code into a
526# C file containing the hex data to build into U-Boot. This file is called
527# dsdt_generated.hex (despite us setting the prefix to .../dsdt_generated.asl.tmp)
528# so must be renamed to dsdt_generated.c for consumption by the build system.
529ASL_TMP = $(patsubst %.c,%.asl.tmp,$@)
530
531quiet_cmd_acpi_c_asl= ASL $<
532cmd_acpi_c_asl= \
533 $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -D__ACPI__ \
534 -P $(UBOOTINCLUDE) -o $(ASL_TMP) $< && \
535 iasl -p $@ -I $(srctree)/board/$(BOARDDIR) -tc $(ASL_TMP) \
536 $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \
537 mv $(patsubst %.c,%.hex,$@) $@
538
539$(obj)/dsdt_generated.c: $(src)/dsdt.asl
540 $(call cmd,acpi_c_asl)
541 $(Q)sed -i -e "s,dsdt_generated_aml_code,AmlCode," $@
542
543# Bzip2
544# ---------------------------------------------------------------------------
545
546# Bzip2 and LZMA do not include size in file... so we have to fake that;
547# append the size as a 32-bit littleendian number as gzip does.
548size_append = printf $(shell \
549dec_size=0; \
550for F in $1; do \
551 fsize=$$(stat -c "%s" $$F); \
552 dec_size=$$(expr $$dec_size + $$fsize); \
553done; \
554printf "%08x\n" $$dec_size | \
555 sed 's/\(..\)/\1 /g' | { \
556 read ch0 ch1 ch2 ch3; \
557 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
558 printf '%s%03o' '\\' $$((0x$$ch)); \
559 done; \
560 } \
561)
562
563quiet_cmd_bzip2 = BZIP2 $@
564cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
565 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
566 (rm -f $@ ; false)
567
568# Lzma
569# ---------------------------------------------------------------------------
570
571quiet_cmd_lzma = LZMA $@
572cmd_lzma = (cat $(filter-out FORCE,$^) | \
573 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
574 (rm -f $@ ; false)
575
576quiet_cmd_lzo = LZO $@
577cmd_lzo = (cat $(filter-out FORCE,$^) | \
578 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
579 (rm -f $@ ; false)
580
581quiet_cmd_lz4 = LZ4 $@
582cmd_lz4 = (cat $(filter-out FORCE,$^) | \
583 lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
584 (rm -f $@ ; false)
585
586# U-Boot mkimage
587# ---------------------------------------------------------------------------
588
589MKIMAGE := $(srctree)/scripts/mkuboot.sh
590
591# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
592# the number of overrides in arch makefiles
593UIMAGE_ARCH ?= $(SRCARCH)
594UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
595UIMAGE_OPTS-y ?=
596UIMAGE_TYPE ?= kernel
597UIMAGE_LOADADDR ?= arch_must_set_this
598UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
599UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
600UIMAGE_IN ?= $<
601UIMAGE_OUT ?= $@
602
603quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT)
604 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
605 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
606 -T $(UIMAGE_TYPE) \
607 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
608 -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
609
610# XZ
611# ---------------------------------------------------------------------------
612# Use xzkern to compress the kernel image and xzmisc to compress other things.
613#
614# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
615# of the kernel decompressor. A BCJ filter is used if it is available for
616# the target architecture. xzkern also appends uncompressed size of the data
617# using size_append. The .xz format has the size information available at
618# the end of the file too, but it's in more complex format and it's good to
619# avoid changing the part of the boot code that reads the uncompressed size.
620# Note that the bytes added by size_append will make the xz tool think that
621# the file is corrupt. This is expected.
622#
623# xzmisc doesn't use size_append, so it can be used to create normal .xz
624# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
625# big dictionary would increase the memory usage too much in the multi-call
626# decompression mode. A BCJ filter isn't used either.
627quiet_cmd_xzkern = XZKERN $@
628cmd_xzkern = (cat $(filter-out FORCE,$^) | \
629 sh $(srctree)/scripts/xz_wrap.sh && \
630 $(call size_append, $(filter-out FORCE,$^))) > $@ || \
631 (rm -f $@ ; false)
632
633quiet_cmd_xzmisc = XZMISC $@
634cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
635 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
636 (rm -f $@ ; false)
637
638# Additional commands for U-Boot
639#
640# bin2c
641# ---------------------------------------------------------------------------
642quiet_cmd_bin2c = BIN2C $@
643 cmd_bin2c = $(objtree)/scripts/bin2c $2 < $< > $@
644
645# mkimage
646# ---------------------------------------------------------------------------
647MKIMAGEOUTPUT ?= /dev/null
648quiet_cmd_mkimage = MKIMAGE $@
649cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
650 >$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
651
652# fdtgrep
653# ---------------------------------------------------------------------------
654# Pass the original device tree file through fdtgrep twice. The first pass
655# removes any unwanted nodes (i.e. those which don't have the
656# 'bootph-all' property and thus are not needed by SPL. The second
657# pass removes various unused properties from the remaining nodes.
658# The output is typically a much smaller device tree file.
659
660ifdef CONFIG_OF_TAG_MIGRATE
661# Support the old tags for a migration period
662migrate_tpl := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
663migrate_vpl := -b u-boot,dm-pre-reloc -b u-boot,dm-vpl
664migrate_spl := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
665migrate_all := -P u-boot,dm-pre-reloc \
666 -P u-boot,dm-spl -P u-boot,dm-tpl -P u-boot,dm-vpl
667endif
668
669ifeq ($(CONFIG_VPL_BUILD),y)
670fdtgrep_props := -b bootph-all -b bootph-verify $(migrate_vpl)
671else
672ifeq ($(CONFIG_TPL_BUILD),y)
673fdtgrep_props := -b bootph-all -b bootph-pre-sram $(migrate_tpl)
674else
675fdtgrep_props := -b bootph-all -b bootph-pre-ram $(migrate_spl)
676endif
677endif
678
679# This rule produces the .dtb for an SPL build.
680#
681# The first fdtgrep keeps nodes with the above properties (with -u ensuring that
682# the properties are implied in all parents of a matching node). The root node
683# is always included, along with /chosen and /config nodes. Referenced aliases
684# (i.e. properties in /aliases which point to an incldued node) are also
685# included.
686#
687# The second fdtgrep removes all bootph properties along with unused strings
688# and any properties in CONFIG_OF_SPL_REMOVE_PROPS
689quiet_cmd_fdtgrep = FDTGREP $@
690 cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -u -RT $< \
691 -n /chosen -n /config -O dtb | \
692 $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
693 -P bootph-all -P bootph-pre-ram -P bootph-pre-sram \
694 -P bootph-verify -P bootph-some-ram \
695 $(migrate_all) \
696 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
697
698# fdt_rm_props
699# ---------------------------------------------------------------------------
700# Pass the original device tree file through fdtgrep. This removes various
701# unused properties. The output is typically a smaller device tree file.
702quiet_cmd_fdt_rm_props = FDTGREP $@
703 cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
704 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS)))
705
706# ASM offsets
707# ---------------------------------------------------------------------------
708
709# Default sed regexp - multiline due to syntax constraints
710define sed-offsets
711 "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
712 /^->/{s:->#\(.*\):/* \1 */:; \
713 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
714 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
715 s:->::; p;}"
716endef
717
718# Use filechk to avoid rebuilds when a header changes, but the resulting file
719# does not
720define filechk_offsets
721 (set -e; \
722 echo "#ifndef $2"; \
723 echo "#define $2"; \
724 echo "/*"; \
725 echo " * DO NOT MODIFY."; \
726 echo " *"; \
727 echo " * This file was generated by Kbuild"; \
728 echo " */"; \
729 echo ""; \
730 sed -ne $(sed-offsets); \
731 echo ""; \
732 echo "#endif" )
733endef