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# flags that take effect in current and sub directories
9KBUILD_AFLAGS += $(subdir-asflags-y)
10KBUILD_CFLAGS += $(subdir-ccflags-y)
11
12# Figure out what we need to build from the various variables
13# ===========================================================================
14
15# When an object is listed to be built compiled-in and modular,
16# only build the compiled-in version
17obj-m := $(filter-out $(obj-y),$(obj-m))
18
19# Libraries are always collected in one lib file.
20# Filter out objects already built-in
21lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
22
23# Subdirectories we need to descend into
24subdir-ym := $(sort $(subdir-y) $(subdir-m) \
25 $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m))))
26
27# Handle objects in subdirs:
28# - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and
29# foo/modules.order
30# - If we encounter foo/ in $(obj-m), replace it by foo/modules.order
31#
32# Generate modules.order to determine modorder. Unfortunately, we don't have
33# information about ordering between -y and -m subdirs. Just put -y's first.
34
35ifdef need-modorder
36obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m))
37else
38obj-m := $(filter-out %/, $(obj-m))
39endif
40
41ifdef need-builtin
42obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
43else
44obj-y := $(filter-out %/, $(obj-y))
45endif
46
47# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
48suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
49# List composite targets that are constructed by combining other targets
50multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m)))
51# List primitive targets that are compiled from source files
52real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m))
53
54# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
55multi-obj-y := $(call multi-search, $(obj-y), .o, -objs -y)
56multi-obj-m := $(call multi-search, $(obj-m), .o, -objs -y -m)
57multi-obj-ym := $(multi-obj-y) $(multi-obj-m)
58
59# Replace multi-part objects by their individual parts,
60# including built-in.a from subdirectories
61real-obj-y := $(call real-search, $(obj-y), .o, -objs -y)
62real-obj-m := $(call real-search, $(obj-m), .o, -objs -y -m)
63
64always-y += $(always-m)
65
66# hostprogs-always-y += foo
67# ... is a shorthand for
68# hostprogs += foo
69# always-y += foo
70hostprogs += $(hostprogs-always-y) $(hostprogs-always-m)
71always-y += $(hostprogs-always-y) $(hostprogs-always-m)
72
73# userprogs-always-y is likewise.
74userprogs += $(userprogs-always-y) $(userprogs-always-m)
75always-y += $(userprogs-always-y) $(userprogs-always-m)
76
77# Composite DTB (i.e. DTB constructed by overlay)
78multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs)
79# Primitive DTB compiled from *.dts
80real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs)
81# Base DTB that overlay is applied onto (each first word of $(*-dtbs) expansion)
82base-dtb-y := $(foreach m, $(multi-dtb-y), $(firstword $(call suffix-search, $m, .dtb, -dtbs)))
83
84# DTB
85# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
86extra-y += $(dtb-y)
87extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-)
88
89# U-Boot specific
90ifneq ($(CHECK_DTBS),)
91extra-y += $(patsubst %.dtb,%.dt.yaml, $(dtb-y))
92extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-))
93endif
94
95# Add subdir path
96
97extra-y := $(addprefix $(obj)/,$(extra-y))
98always-y := $(addprefix $(obj)/,$(always-y))
99targets := $(addprefix $(obj)/,$(targets))
100obj-m := $(addprefix $(obj)/,$(obj-m))
101lib-y := $(addprefix $(obj)/,$(lib-y))
102real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
103real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
104multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
105multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y))
106real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y))
107subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
108
109# Finds the multi-part object the current object will be linked into.
110# If the object belongs to two or more multi-part objects, list them all.
111modname-multi = $(sort $(foreach m,$(multi-obj-ym),\
112 $(if $(filter $*.o, $(call suffix-search, $m, .o, -objs -y -m)),$(m:.o=))))
113
114__modname = $(or $(modname-multi),$(basetarget))
115
116modname = $(subst $(space),:,$(__modname))
117modfile = $(addprefix $(obj)/,$(__modname))
118
119# target with $(obj)/ and its suffix stripped
120target-stem = $(basename $(patsubst $(obj)/%,%,$@))
121
122# These flags are needed for modversions and compiling, so we define them here
123# $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
124# end up in (or would, if it gets compiled in)
125name-fix-token = $(subst $(comma),_,$(subst -,_,$1))
126name-fix = $(call stringify,$(call name-fix-token,$1))
127basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
128modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname)) \
129 -D__KBUILD_MODNAME=kmod_$(call name-fix-token,$(modname))
130modfile_flags = -DKBUILD_MODFILE=$(call stringify,$(modfile))
131
132_c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \
133 $(filter-out $(ccflags-remove-y), \
134 $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \
135 $(CFLAGS_$(target-stem).o))
136_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \
137 $(filter-out $(asflags-remove-y), \
138 $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \
139 $(AFLAGS_$(target-stem).o))
140_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
141
142#
143# Enable gcov profiling flags for a file, directory or for all files depending
144# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
145# (in this order)
146#
147ifeq ($(CONFIG_GCOV_KERNEL),y)
148_c_flags += $(if $(patsubst n%,, \
149 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
150 $(CFLAGS_GCOV))
151endif
152
153#
154# Enable address sanitizer flags for kernel except some files or directories
155# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
156#
157ifeq ($(CONFIG_KASAN),y)
158ifneq ($(CONFIG_KASAN_HW_TAGS),y)
159_c_flags += $(if $(patsubst n%,, \
160 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
161 $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE))
162endif
163endif
164
165ifeq ($(CONFIG_UBSAN),y)
166_c_flags += $(if $(patsubst n%,, \
167 $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \
168 $(CFLAGS_UBSAN))
169endif
170
171ifeq ($(CONFIG_KCOV),y)
172_c_flags += $(if $(patsubst n%,, \
173 $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
174 $(CFLAGS_KCOV))
175endif
176
177#
178# Enable KCSAN flags except some files or directories we don't want to check
179# (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE)
180#
181ifeq ($(CONFIG_KCSAN),y)
182_c_flags += $(if $(patsubst n%,, \
183 $(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \
184 $(CFLAGS_KCSAN))
185# Some uninstrumented files provide implied barriers required to avoid false
186# positives: set KCSAN_INSTRUMENT_BARRIERS for barrier instrumentation only.
187_c_flags += $(if $(patsubst n%,, \
188 $(KCSAN_INSTRUMENT_BARRIERS_$(basetarget).o)$(KCSAN_INSTRUMENT_BARRIERS)n), \
189 -D__KCSAN_INSTRUMENT_BARRIERS__)
190endif
191
192# $(srctree)/$(src) for including checkin headers from generated source files
193# $(objtree)/$(obj) for including generated headers from checkin source files
194ifeq ($(KBUILD_EXTMOD),)
195ifdef building_out_of_srctree
196_c_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
197_a_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
198_cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
199endif
200endif
201
202part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
203quiet_modtag = $(if $(part-of-module),[M], )
204
205modkern_cflags = \
206 $(if $(part-of-module), \
207 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
208 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))
209
210modkern_aflags = $(if $(part-of-module), \
211 $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
212 $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
213
214
215# Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
216# removed the inclusion of compiler_types.h for sandbox build
217c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
218 $(_c_flags) $(modkern_cflags) \
219 $(basename_flags) $(modname_flags)
220
221a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
222 $(_a_flags) $(modkern_aflags)
223
224cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
225 $(_cpp_flags)
226
227ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
228
229# Try these files in order to find the U-Boot-specific .dtsi include file
230u_boot_dtsi_loc = $(srctree)/arch/$(ARCH)/dts/
231
232u_boot_dtsi_options = $(strip $(wildcard $(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi) \
233 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \
234 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \
235 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \
236 $(wildcard $(u_boot_dtsi_loc)u-boot.dtsi))
237
238u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \
239 $(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi \
240 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \
241 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \
242 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \
243 $(u_boot_dtsi_loc)u-boot.dtsi ... \
244 found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!))
245
246# Uncomment for debugging
247# This shows all the files that were considered and the one that we chose.
248ifdef DEVICE_TREE_DEBUG
249u_boot_dtsi_options_debug = $(warning $(u_boot_dtsi_options_raw))
250endif
251
252# We use the first match to be included
253dtsi_include_list = $(strip $(u_boot_dtsi_options_debug) \
254 $(notdir $(firstword $(u_boot_dtsi_options))))
255
256# Modified for U-Boot
257upstream_dtsi_include = $(addprefix -I, $(srctree)/dts/upstream/src/ \
258 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/$(ARCH)/*/*))) \
259 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/$(ARCH)/*/*/*))) \
260 $(if (CONFIG_ARM64), \
261 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/arm64/*/*))) \
262 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/arm64/*/*/*)))))
263dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
264 $(UBOOTINCLUDE) \
265 -I$(dir $<) \
266 -I$(u_boot_dtsi_loc) \
267 -I$(srctree)/arch/$(ARCH)/dts/include \
268 -I$(srctree)/include \
269 $(upstream_dtsi_include) \
270 -D__ASSEMBLY__ \
271 -undef -D__DTS__
272
273ifdef CONFIG_OBJTOOL
274
275objtool := $(objtree)/tools/objtool/objtool
276
277objtool_args = \
278 $(if $(CONFIG_HAVE_JUMP_LABEL_HACK), --hacks=jump_label) \
279 $(if $(CONFIG_HAVE_NOINSTR_HACK), --hacks=noinstr) \
280 $(if $(CONFIG_X86_KERNEL_IBT), --ibt) \
281 $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount) \
282 $(if $(CONFIG_UNWINDER_ORC), --orc) \
283 $(if $(CONFIG_RETPOLINE), --retpoline) \
284 $(if $(CONFIG_RETHUNK), --rethunk) \
285 $(if $(CONFIG_SLS), --sls) \
286 $(if $(CONFIG_STACK_VALIDATION), --stackval) \
287 $(if $(CONFIG_HAVE_STATIC_CALL_INLINE), --static-call) \
288 $(if $(CONFIG_HAVE_UACCESS_VALIDATION), --uaccess) \
289 $(if $(delay-objtool), --link) \
290 $(if $(part-of-module), --module) \
291 $(if $(CONFIG_GCOV_KERNEL), --no-unreachable)
292
293delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT))
294
295cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool_args) $@)
296cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd)
297
298endif # CONFIG_OBJTOOL
299
300# Useful for describing the dependency of composite objects
301# Usage:
302# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
303define multi_depend
304$(foreach m, $1, \
305 $(eval $m: \
306 $(addprefix $(obj)/, $(call suffix-search, $(patsubst $(obj)/%,%,$m), $2, $3))))
307endef
308
309# Copy a file
310# ===========================================================================
311# 'cp' preserves permissions. If you use it to copy a file in read-only srctree,
312# the copy would be read-only as well, leading to an error when executing the
313# rule next time. Use 'cat' instead in order to generate a writable file.
314quiet_cmd_copy = COPY $@
315 cmd_copy = cat $< > $@
316
317$(obj)/%: $(src)/%_shipped
318 $(call cmd,copy)
319
320# Commands useful for building a boot image
321# ===========================================================================
322#
323# Use as following:
324#
325# target: source(s) FORCE
326# $(if_changed,ld/objcopy/gzip)
327#
328# and add target to 'targets' so that we know we have to
329# read in the saved command line
330
331# Linking
332# ---------------------------------------------------------------------------
333
334quiet_cmd_ld = LD $@
335 cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@
336
337# Archive
338# ---------------------------------------------------------------------------
339
340quiet_cmd_ar = AR $@
341 cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs)
342
343# Objcopy
344# ---------------------------------------------------------------------------
345
346quiet_cmd_objcopy = OBJCOPY $@
347cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
348
349# Gzip
350# ---------------------------------------------------------------------------
351
352quiet_cmd_gzip = GZIP $@
353 cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@
354
355# DTC
356# ---------------------------------------------------------------------------
357DTC ?= $(objtree)/scripts/dtc/dtc
358DTC_FLAGS += -Wno-interrupt_provider
359
360# Disable noisy checks by default
361ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
362DTC_FLAGS += -Wno-unit_address_vs_reg \
363 -Wno-unit_address_format \
364 -Wno-avoid_unnecessary_addr_size \
365 -Wno-alias_paths \
366 -Wno-graph_child_address \
367 -Wno-simple_bus_reg \
368 -Wno-unique_unit_address \
369 -Wno-pci_device_reg
370
371# U-Boot specific disables
372DTC_FLAGS += -Wno-pci_bridge \
373 -Wno-pci_device_bus_num
374endif
375
376ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
377DTC_FLAGS += -Wnode_name_chars_strict \
378 -Wproperty_name_chars_strict \
379 -Winterrupt_provider
380endif
381
382DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
383
384# Set -@ if the target is a base DTB that overlay is applied onto
385DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@)
386
387# Generate an assembly file to wrap the output of the device tree compiler
388quiet_cmd_dt_S_dtb= DTBS $@
389# Modified for U-Boot
390cmd_dt_S_dtb= \
391{ \
392 echo '.section .dtb.init.rodata,"a"'; \
393 echo '.balign 16'; \
394 echo '.global __dtb_$(subst -,_,$(*F))_begin'; \
395 echo '__dtb_$(subst -,_,$(*F))_begin:'; \
396 echo '.incbin "$<" '; \
397 echo '__dtb_$(subst -,_,$(*F))_end:'; \
398 echo '.global __dtb_$(subst -,_,$(*F))_end'; \
399 echo '.balign 16'; \
400} > $@
401
402$(obj)/%.dtb.S: $(obj)/%.dtb FORCE
403 $(call if_changed,dt_S_dtb)
404
405# Generate an assembly file to wrap the output of the device tree compiler
406quiet_cmd_dt_S_dtbo= DTBOS $@
407# Modified for U-Boot
408cmd_dt_S_dtbo= \
409{ \
410 echo '.section .dtb.init.rodata,"a"'; \
411 echo '.balign 16'; \
412 echo '.global __dtbo_$(subst -,_,$(*F))_begin'; \
413 echo '__dtbo_$(subst -,_,$(*F))_begin:'; \
414 echo '.incbin "$<" '; \
415 echo '__dtbo_$(subst -,_,$(*F))_end:'; \
416 echo '.global __dtbo_$(subst -,_,$(*F))_end'; \
417 echo '.balign 16'; \
418} > $@
419
420$(obj)/%.dtbo.S: $(obj)/%.dtbo
421 $(call cmd,dt_S_dtbo)
422
423ifeq ($(CONFIG_OF_LIBFDT_OVERLAY),y)
424DTC_FLAGS += -@
425endif
426
427# In case DEVICE_TREE_DEBUG is set, produce a diff between the base DT and
428# DT with U-Boot extras, to show how much does the U-Boot DT differ from
429# the base DT. This is particularly useful together with OF_UPSTREAM, to
430# minimize the diff between upstream DTs and U-Boot DTs.
431ifdef DEVICE_TREE_DEBUG
432cmd_dtc_diff = \
433 $(HOSTCC) -E $(dtc_cpp_flags) -I$(obj) -x assembler-with-cpp -o $(dtn-tmp) $< ; \
434 $(DTC) -s -O dts -o $@.clean.dts -b 0 \
435 -i $(dir $<) $(DTC_FLAGS) $(dtn-tmp) || \
436 (echo "Check $(shell pwd)/$< for errors" && false); \
437 $(DTC) -s -O dts -o $@.full.dts -b 0 \
438 -i $(dir $<) -i $(u_boot_dtsi_loc) $(DTC_FLAGS) $(dtc-tmp) || \
439 (echo "Check $(shell pwd)/$(pre-tmp) for errors" && false); \
440 sed -i '/\<phandle\> = <0x[0-9a-f]\+>;/ d' $@.clean.dts; \
441 sed -i '/\<phandle\> = <0x[0-9a-f]\+>;/ d' $@.full.dts; \
442 (diff -Naru $@.clean.dts $@.full.dts > $@.diff || true)
443
444dtn-tmp = $(subst $(comma),_,$(dot-target).dtn.tmp)
445else
446cmd_dtc_diff = true
447endif
448
449quiet_cmd_dtc = DTC $@
450# Modified for U-Boot
451# Bring in any U-Boot-specific include at the end of the file
452# And finally any custom .dtsi fragments specified with CONFIG_DEVICE_TREE_INCLUDES
453cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
454 (cat $< > $(pre-tmp)); \
455 $(foreach f,$(subst $(quote),,$(dtsi_include_list) $(CONFIG_DEVICE_TREE_INCLUDES)), \
456 echo '$(pound)include "$(f)"' >> $(pre-tmp);) \
457 $(HOSTCC) -E $(dtc_cpp_flags) -I$(obj) -x assembler-with-cpp -o $(dtc-tmp) $(pre-tmp) ; \
458 $(DTC) -O dtb -o $@ -b 0 \
459 -i $(dir $<) -i $(u_boot_dtsi_loc) $(DTC_FLAGS) \
460 -d $(depfile).dtc.tmp $(dtc-tmp) || \
461 (echo "Check $(shell pwd)/$(pre-tmp) for errors" && false) \
462 ; \
463 sed "s:$(pre-tmp):$(<):" $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) ; \
464 $(cmd_dtc_diff)
465
466dtsi_include_list_deps := $(addprefix $(u_boot_dtsi_loc),$(subst $(quote),,$(dtsi_include_list)))
467
468ifneq ($(CHECK_DTBS),)
469DT_CHECKER ?= dt-validate
470DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m)
471DT_BINDING_DIR := dts/upstream/Bindings
472DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json
473
474quiet_cmd_dtb = DTC_CHK $@
475 cmd_dtb = $(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true
476else
477quiet_cmd_dtb = $(quiet_cmd_dtc)
478 cmd_dtb = $(cmd_dtc)
479endif
480
481$(obj)/%.dtb: $(src)/%.dts $(DTC) $(dtsi_include_list_deps) $(DT_TMP_SCHEMA) FORCE
482# $(call if_changed_dep,dtb)
483
484pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp)
485dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
486
487# DTCO
488# ---------------------------------------------------------------------------
489
490quiet_cmd_dtco = DTCO $@
491# Rule for objects only; does not put specific u-boot include at the end
492# No generation of assembly file either
493# Modified for U-Boot
494cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
495 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
496 $(DTC) -@ -O dtb -o $@ -b 0 \
497 -i $(dir $<) $(DTC_FLAGS) \
498 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
499 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
500
501$(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE
502 $(call if_changed_dep,dtco)
503
504quiet_cmd_fdtoverlay = DTOVL $@
505 cmd_fdtoverlay = fdtoverlay -o $@ -i $(real-prereqs)
506
507$(multi-dtb-y): FORCE
508 $(call if_changed,fdtoverlay)
509$(call multi_depend, $(multi-dtb-y), .dtb, -dtbs)
510
511# Fonts
512# ---------------------------------------------------------------------------
513
514# Generate an assembly file to wrap the font data
515quiet_cmd_S_ttf= TTF $@
516# Modified for U-Boot
517cmd_S_ttf= \
518( \
519 echo '.section .rodata.ttf.init,"a"'; \
520 echo '.balign 16'; \
521 echo '.global __ttf_$(*F)_begin'; \
522 echo '__ttf_$(*F)_begin:'; \
523 echo '.incbin "$<" '; \
524 echo '__ttf_$(*F)_end:'; \
525 echo '.global __ttf_$(*F)_end'; \
526 echo '.balign 16'; \
527) > $@
528
529$(obj)/%.S: $(src)/%.ttf
530 $(call cmd,S_ttf)
531
532# Splash logos
533# ---------------------------------------------------------------------------
534
535# Generate an assembly file to wrap the splash data
536quiet_cmd_S_splash= TTF $@
537# Modified for U-Boot
538cmd_S_splash= \
539( \
540 echo '.section .rodata.splash.init,"a"'; \
541 echo '.balign 16'; \
542 echo '.global __splash_$(*F)_begin'; \
543 echo '__splash_$(*F)_begin:'; \
544 echo '.incbin "$<" '; \
545 echo '__splash_$(*F)_end:'; \
546 echo '.global __splash_$(*F)_end'; \
547 echo '.balign 16'; \
548) > $@
549
550$(obj)/%.S: $(src)/%.bmp
551 $(call cmd,S_splash)
552
553# EFI applications
554# A Makefile target *.efi is built as EFI application.
555# A Makefile target *_efi.S wraps *.efi as built-in EFI application.
556# ---------------------------------------------------------------------------
557
558# Generate an assembly file to wrap the EFI app
559cmd_S_efi= \
560( \
561 echo '.section .rodata.$*.init,"a"'; \
562 echo '.balign 16'; \
563 echo '.global __efi_$*_begin'; \
564 echo '__efi_$*_begin:'; \
565 echo '.incbin "$<" '; \
566 echo '__efi_$*_end:'; \
567 echo '.global __efi_$*_end'; \
568 echo '.balign 16'; \
569) > $@
570
571$(obj)/%_efi.S: $(obj)/%.efi
572 $(call cmd,S_efi)
573
574quiet_cmd_efi_objcopy = OBJCOPY $@
575cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data \
576 -j .dynamic -j .dynstr -j .dynsym -j .rel* -j .reloc \
577 $(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@
578
579$(obj)/%.efi: $(obj)/%_efi.so
580 $(call cmd,efi_objcopy)
581
582KBUILD_EFILDFLAGS = -nostdlib -zexecstack -znocombreloc -znorelro
583KBUILD_EFILDFLAGS += $(call ld-option,--no-warn-rwx-segments)
584quiet_cmd_efi_ld = LD $@
585cmd_efi_ld = $(LD) $(KBUILD_EFILDFLAGS) -L $(srctree) -T $(EFI_LDS_PATH) \
586 -shared -Bsymbolic -s $^ $(PLATFORM_LIBGCC) -o $@
587
588EFI_LDS_PATH = arch/$(ARCH)/lib/$(EFI_LDS)
589
590$(obj)/efi_crt0.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_CRT0:.o=.S) FORCE
591 $(call if_changed_dep,as_o_S)
592
593$(obj)/efi_reloc.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_RELOC:.o=.c) $(recordmcount_source) FORCE
594 $(call cmd,force_checksrc)
595 $(call if_changed_rule,cc_o_c)
596
597$(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o
598 $(call cmd,efi_ld)
599
600targets += $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o
601
602CFLAGS_REMOVE_efi_reloc.o := $(LTO_CFLAGS)
603CFLAGS_REMOVE_efi_freestanding.o := $(LTO_CFLAGS)
604
605# ACPI
606# ---------------------------------------------------------------------------
607#
608# This first sends the file (typically dsdt.asl) through the preprocessor
609# resolve includes and any CONFIG options used. This produces dsdt.asl.tmp
610# which is pure ASL code. The Intel ASL (ACPI (Advanced Configuration and Power
611# Interface) Source Language compiler (iasl) then converts this ASL code into a
612# C file containing the hex data to build into U-Boot. This file is called
613# dsdt_generated.hex (despite us setting the prefix to .../dsdt_generated.asl.tmp)
614# so must be renamed to dsdt_generated.c for consumption by the build system.
615ASL_TMP = $(patsubst %.c,%.asl.tmp,$@)
616
617quiet_cmd_acpi_c_asl= ASL $<
618cmd_acpi_c_asl= \
619 $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -D__ACPI__ \
620 -P $(UBOOTINCLUDE) -o $(ASL_TMP) $< && \
621 iasl -p $@ -I $(srctree)/board/$(BOARDDIR) -tc $(ASL_TMP) \
622 $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \
623 mv $(patsubst %.c,%.hex,$@) $@
624
625$(obj)/dsdt_generated.c: $(src)/dsdt.asl
626 $(call cmd,acpi_c_asl)
627 $(Q)sed -i -e "s,dsdt_generated_aml_code,AmlCode," $@
628
629# Bzip2
630# ---------------------------------------------------------------------------
631
632# Bzip2 and LZMA do not include size in file... so we have to fake that;
633# append the size as a 32-bit littleendian number as gzip does.
634size_append = printf $(shell \
635dec_size=0; \
636for F in $(real-prereqs); do \
637 fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \
638 dec_size=$$(expr $$dec_size + $$fsize); \
639done; \
640printf "%08x\n" $$dec_size | \
641 sed 's/\(..\)/\1 /g' | { \
642 read ch0 ch1 ch2 ch3; \
643 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
644 printf '%s%03o' '\\' $$((0x$$ch)); \
645 done; \
646 } \
647)
648
649quiet_cmd_file_size = GEN $@
650 cmd_file_size = $(size_append) > $@
651
652quiet_cmd_bzip2 = BZIP2 $@
653 cmd_bzip2 = cat $(real-prereqs) | $(KBZIP2) -9 > $@
654
655quiet_cmd_bzip2_with_size = BZIP2 $@
656 cmd_bzip2_with_size = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@
657
658# Lzma
659# ---------------------------------------------------------------------------
660
661quiet_cmd_lzma = LZMA $@
662 cmd_lzma = cat $(real-prereqs) | $(LZMA) -9 > $@
663
664quiet_cmd_lzma_with_size = LZMA $@
665 cmd_lzma_with_size = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@
666
667quiet_cmd_lzo = LZO $@
668 cmd_lzo = cat $(real-prereqs) | $(KLZOP) -9 > $@
669
670quiet_cmd_lzo_with_size = LZO $@
671 cmd_lzo_with_size = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@
672
673quiet_cmd_lz4 = LZ4 $@
674 cmd_lz4 = cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout > $@
675
676quiet_cmd_lz4_with_size = LZ4 $@
677 cmd_lz4_with_size = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \
678 $(size_append); } > $@
679
680# U-Boot mkimage
681# ---------------------------------------------------------------------------
682
683MKIMAGE := $(srctree)/scripts/mkuboot.sh
684
685# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
686# the number of overrides in arch makefiles
687UIMAGE_ARCH ?= $(SRCARCH)
688UIMAGE_COMPRESSION ?= $(or $(2),none)
689UIMAGE_OPTS-y ?=
690UIMAGE_TYPE ?= kernel
691UIMAGE_LOADADDR ?= arch_must_set_this
692UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
693UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
694
695quiet_cmd_uimage = UIMAGE $@
696 cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
697 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
698 -T $(UIMAGE_TYPE) \
699 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
700 -n $(UIMAGE_NAME) -d $< $@
701
702# XZ
703# ---------------------------------------------------------------------------
704# Use xzkern to compress the kernel image and xzmisc to compress other things.
705#
706# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
707# of the kernel decompressor. A BCJ filter is used if it is available for
708# the target architecture. xzkern also appends uncompressed size of the data
709# using size_append. The .xz format has the size information available at
710# the end of the file too, but it's in more complex format and it's good to
711# avoid changing the part of the boot code that reads the uncompressed size.
712# Note that the bytes added by size_append will make the xz tool think that
713# the file is corrupt. This is expected.
714#
715# xzmisc doesn't use size_append, so it can be used to create normal .xz
716# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
717# big dictionary would increase the memory usage too much in the multi-call
718# decompression mode. A BCJ filter isn't used either.
719quiet_cmd_xzkern = XZKERN $@
720 cmd_xzkern = cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh > $@
721
722quiet_cmd_xzkern_with_size = XZKERN $@
723 cmd_xzkern_with_size = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \
724 $(size_append); } > $@
725
726quiet_cmd_xzmisc = XZMISC $@
727 cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@
728
729# ZSTD
730# ---------------------------------------------------------------------------
731# Appends the uncompressed size of the data using size_append. The .zst
732# format has the size information available at the beginning of the file too,
733# but it's in a more complex format and it's good to avoid changing the part
734# of the boot code that reads the uncompressed size.
735#
736# Note that the bytes added by size_append will make the zstd tool think that
737# the file is corrupt. This is expected.
738#
739# zstd uses a maximum window size of 8 MB. zstd22 uses a maximum window size of
740# 128 MB. zstd22 is used for kernel compression because it is decompressed in a
741# single pass, so zstd doesn't need to allocate a window buffer. When streaming
742# decompression is used, like initramfs decompression, zstd22 should likely not
743# be used because it would require zstd to allocate a 128 MB buffer.
744
745quiet_cmd_zstd = ZSTD $@
746 cmd_zstd = cat $(real-prereqs) | $(ZSTD) -19 > $@
747
748quiet_cmd_zstd22 = ZSTD22 $@
749 cmd_zstd22 = cat $(real-prereqs) | $(ZSTD) -22 --ultra > $@
750
751quiet_cmd_zstd22_with_size = ZSTD22 $@
752 cmd_zstd22_with_size = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@
753
754# Additional commands for U-Boot
755#
756# bin2c
757# ---------------------------------------------------------------------------
758quiet_cmd_bin2c = BIN2C $@
759 cmd_bin2c = $(objtree)/scripts/bin2c $2 < $< > $@
760
761# mkimage
762# ---------------------------------------------------------------------------
763MKIMAGEOUTPUT ?= /dev/null
764quiet_cmd_mkimage = MKIMAGE $@
765cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
766 >$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
767
768# fdtgrep
769# ---------------------------------------------------------------------------
770# Pass the original device tree file through fdtgrep twice. The first pass
771# removes any unwanted nodes (i.e. those which don't have the
772# 'bootph-all' property and thus are not needed by SPL. The second
773# pass removes various unused properties from the remaining nodes.
774# The output is typically a much smaller device tree file.
775
776ifeq ($(CONFIG_VPL_BUILD),y)
777fdtgrep_props := -b bootph-all -b bootph-verify $(migrate_vpl)
778else
779ifeq ($(CONFIG_TPL_BUILD),y)
780fdtgrep_props := -b bootph-all -b bootph-pre-sram $(migrate_tpl)
781else
782fdtgrep_props := -b bootph-all -b bootph-pre-ram $(migrate_spl)
783endif
784endif
785
786# This rule produces the .dtb for an SPL build.
787#
788# The first fdtgrep keeps nodes with the above properties (with -u ensuring that
789# the properties are implied in all parents of a matching node). The root node
790# is always included, along with /chosen and /config nodes. Referenced aliases
791# (i.e. properties in /aliases which point to an incldued node) are also
792# included.
793#
794# The second fdtgrep removes all bootph properties along with unused strings
795# and any properties in CONFIG_OF_SPL_REMOVE_PROPS
796quiet_cmd_fdtgrep = FDTGREP $@
797 cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -u -RT $< \
798 -n /chosen -n /config -O dtb | \
799 $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
800 -P bootph-all -P bootph-pre-ram -P bootph-pre-sram \
801 -P bootph-verify -P bootph-some-ram \
802 $(migrate_all) \
803 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
804
805# fdt_rm_props
806# ---------------------------------------------------------------------------
807# Pass the original device tree file through fdtgrep. This removes various
808# unused properties. The output is typically a smaller device tree file.
809quiet_cmd_fdt_rm_props = FDTGREP $@
810 cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
811 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS)))
812
813# ASM offsets
814# ---------------------------------------------------------------------------
815
816# Default sed regexp - multiline due to syntax constraints
817#
818# Use [:space:] because LLVM's integrated assembler inserts <tab> around
819# the .ascii directive whereas GCC keeps the <space> as-is.
820define sed-offsets
821 's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \
822 /^->/{s:->#\(.*\):/* \1 */:; \
823 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
824 s:->::; p;}'
825endef
826
827# Use filechk to avoid rebuilds when a header changes, but the resulting file
828# does not
829define filechk_offsets
830 echo "#ifndef $2"; \
831 echo "#define $2"; \
832 echo "/*"; \
833 echo " * DO NOT MODIFY."; \
834 echo " *"; \
835 echo " * This file was generated by Kbuild"; \
836 echo " */"; \
837 echo ""; \
838 sed -ne $(sed-offsets) < $<; \
839 echo ""; \
840 echo "#endif"
841endef