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1#
2# Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
3#
4# SPDX-License-Identifier: BSD-3-Clause
5#
6
7include ../../make_helpers/build-rules.mk
8include ../../make_helpers/common.mk
9include ../../make_helpers/toolchain.mk
10
11ROMLIB_GEN  = ./romlib_generator.py
12BUILD_DIR   = $(BUILD_PLAT)/romlib
13LIB_DIR     = $(BUILD_PLAT)/lib
14WRAPPER_DIR = $(BUILD_PLAT)/libwrapper
15LIBS        = -lmbedtls -lfdt -lc
16INC         = $(INCLUDES:-I%=-I../../%)
17PPFLAGS     = $(INC) $(DEFINES) -P -x assembler-with-cpp -D__LINKER__ -MD -MP -MT $(BUILD_DIR)/romlib.ld
18OBJS        = $(BUILD_DIR)/jmptbl.o $(BUILD_DIR)/init.o
19MAPFILE     = $(BUILD_PLAT)/romlib/romlib.map
20
21ifneq ($(PLAT_DIR),)
22        WRAPPER_SOURCES = $(sort $(shell $(ROMLIB_GEN) genwrappers -b $\
23                $(WRAPPER_DIR) --list ../../$(PLAT_DIR)/jmptbl.i))
24
25        WRAPPER_OBJS = $(WRAPPER_SOURCES:.s=.o)
26endif
27
28LDFLAGS := -Wl,--gc-sections -nostdlib
29
30ifeq ($(DEBUG),1)
31   LDFLAGS += -Wl,-Map=$(MAPFILE)
32endif
33
34ifeq (${ARM_ARCH_MINOR},0)
35	ASFLAGS = -march=armv8-a
36else
37	ASFLAGS = -march=armv8.${ARM_ARCH_MINOR}-a
38endif
39
40.PHONY: all clean distclean
41
42all: $(BUILD_DIR)/romlib.bin $(BUILD_DIR)/romlib.ldflags $(LIB_DIR)/libwrappers.a
43
44%.o: %.s | $$(@D)/
45	$(s)echo "  AS      $@"
46	$(q)$(aarch64-as) -c $(ASFLAGS) -o $@ $<
47
48$(BUILD_DIR)/%.o: %.s | $$(@D)/
49	$(s)echo "  AS      $@"
50	$(q)$(aarch64-as) -c $(ASFLAGS) -o $@ $<
51
52$(BUILD_DIR)/romlib.ld: romlib.ld.S | $$(@D)/
53	$(s)echo "  PP      $@"
54	$(q)$(aarch64-cpp) -E $(PPFLAGS) -o $@ romlib.ld.S
55
56$(BUILD_DIR)/romlib.elf: $(OBJS) $(BUILD_DIR)/romlib.ld | $$(@D)/
57	$(s)echo "  LD      $@"
58	$(q)$(aarch64-ld) -T $(BUILD_DIR)/romlib.ld -L$(LIB_DIR) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
59
60$(BUILD_DIR)/romlib.bin: $(BUILD_DIR)/romlib.elf | $$(@D)/
61	$(s)echo "  BIN     $@"
62	$(q)$(aarch64-oc) -O binary $(BUILD_DIR)/romlib.elf $@
63
64$(WRAPPER_DIR)/jmpvar.s: $(BUILD_DIR)/romlib.elf | $$(@D)/
65	$(s)echo "  VAR     $@"
66	$(q)$(ROMLIB_GEN) genvar --output $@ $<
67
68$(LIB_DIR)/libwrappers.a: $(WRAPPER_DIR)/jmpvar.o $(WRAPPER_OBJS) | $$(@D)/
69	$(s)echo "  AR      $@"
70	$(q)$(aarch64-ar) -rc $@ $(WRAPPER_DIR)/jmpvar.o $(WRAPPER_OBJS)
71
72$(BUILD_DIR)/jmptbl.i: ../../$(PLAT_DIR)/jmptbl.i | $$(@D)/
73	$(s)echo "  PRE     $@"
74	$(q)$(ROMLIB_GEN) pre --output $@ --deps $(BUILD_DIR)/jmptbl.d $<
75
76$(WRAPPER_SOURCES) $&: $(BUILD_DIR)/jmptbl.i | $$(@D)/
77	$(s)echo "  WRP     $<"
78	$(q)$(ROMLIB_GEN) genwrappers --bti=$(ENABLE_BTI) -b $(WRAPPER_DIR) $<
79
80$(WRAPPER_OBJS): $(WRAPPER_DIR)/%.o: $(WRAPPER_DIR)/%.s | $$(@D)/
81
82$(BUILD_DIR)/jmptbl.s: $(BUILD_DIR)/jmptbl.i | $$(@D)/
83	$(s)echo "  TBL     $@"
84	$(q)$(ROMLIB_GEN) gentbl --output $@ --bti=$(ENABLE_BTI) $<
85
86$(BUILD_DIR)/romlib.ldflags: ../../$(PLAT_DIR)/jmptbl.i | $$(@D)/
87	$(s)echo "  LDFLAGS $@"
88	$(q)$(ROMLIB_GEN) link-flags $< > $@
89
90clean:
91	$(q)rm -f $(BUILD_DIR)/*
92
93-include $(BUILD_DIR)/romlib.d
94-include $(BUILD_DIR)/jmptbl.d
95