projects/linux·blob master · refs

91 lines · 3.4 KiB

1# SPDX-License-Identifier: GPL-2.0
2KBUILD_DEFCONFIG := mmu_defconfig
3
4UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\"
5
6# What CPU version are we building for, and crack it open
7# as major.minor.rev
8CPU_VER := $(CONFIG_XILINX_MICROBLAZE0_HW_VER)
9CPU_MAJOR := $(word 1, $(subst ., , $(CPU_VER)))
10CPU_MINOR := $(word 2, $(subst ., , $(CPU_VER)))
11CPU_REV := $(word 3, $(subst ., , $(CPU_VER)))
12
13export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV
14
15# Use cpu-related CONFIG_ vars to set compile options.
16# The various CONFIG_XILINX cpu features options are integers 0/1/2...
17# rather than bools y/n
18
19# Work out HW multiplier support. This is tricky.
20# 1. Spartan2 has no HW multipliers.
21# 2. MicroBlaze v3.x always uses them, except in Spartan 2
22# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings
23ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY)))
24 ifeq ($(CPU_MAJOR),3)
25 CPUFLAGS-1 += -mno-xl-soft-mul
26 else
27 # USE_HW_MUL can be 0, 1, or 2, defining a hierarchy of HW Mul support.
28 CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high
29 CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul
30 endif
31endif
32CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
33CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
34CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
35
36ifdef CONFIG_CPU_BIG_ENDIAN
37KBUILD_CPPFLAGS += -mbig-endian
38KBUILD_LDFLAGS += -EB
39else
40KBUILD_CPPFLAGS += -mlittle-endian
41KBUILD_LDFLAGS += -EL
42endif
43
44CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
45
46# r31 holds current when in kernel mode
47KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-y) $(CPUFLAGS-1) $(CPUFLAGS-2)
48
49libs-y += arch/microblaze/lib/
50
51boot := arch/microblaze/boot
52
53# Are we making a simpleImage.<boardname> target? If so, crack out the boardname
54DTB:=$(subst simpleImage.,,$(filter simpleImage.%, $(MAKECMDGOALS)))
55
56export DTB
57
58all: linux.bin
59
60archheaders:
61 $(Q)$(MAKE) $(build)=arch/microblaze/kernel/syscalls all
62
63PHONY += linux.bin linux.bin.gz linux.bin.ub
64linux.bin.ub linux.bin.gz: linux.bin
65linux.bin: vmlinux
66linux.bin linux.bin.gz linux.bin.ub:
67 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
68 @echo 'Kernel: $(boot)/$@ is ready' ' (#'$(or $(KBUILD_BUILD_VERSION),`cat .version`)')'
69
70PHONY += simpleImage.$(DTB)
71simpleImage.$(DTB): vmlinux
72 $(Q)$(MAKE) $(build)=$(boot) $(addprefix $(boot)/$@., ub unstrip strip)
73 @echo 'Kernel: $(boot)/$@ is ready' ' (#'$(or $(KBUILD_BUILD_VERSION),`cat .version`)')'
74
75define archhelp
76 echo '* linux.bin - Create raw binary'
77 echo ' linux.bin.gz - Create compressed raw binary'
78 echo ' linux.bin.ub - Create U-Boot wrapped raw binary'
79 echo ' simpleImage.<dt> - Create the following images with <dt>.dtb linked in'
80 echo ' simpleImage.<dt> : raw image'
81 echo ' simpleImage.<dt>.ub : raw image with U-Boot header'
82 echo ' simpleImage.<dt>.unstrip: ELF (identical to vmlinux)'
83 echo ' simpleImage.<dt>.strip : stripped ELF'
84 echo ' Targets with <dt> embed a device tree blob inside the image'
85 echo ' These targets support board with firmware that does not'
86 echo ' support passing a device tree directly. Replace <dt> with the'
87 echo ' name of a dts file from the arch/microblaze/boot/dts/ directory'
88 echo ' (minus the .dts extension).'
89endef
90
91MRPROPER_FILES += $(boot)/simpleImage.*