xref: /openbmc/linux/arch/microblaze/Makefile (revision a72594ca) 
1# SPDX-License-Identifier: GPL-2.0
2KBUILD_DEFCONFIG := mmu_defconfig
3
4ifeq ($(CONFIG_MMU),y)
5UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\"
6else
7UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\"
8endif
9
10# What CPU vesion are we building for, and crack it open
11# as major.minor.rev
12CPU_VER   := $(shell echo $(CONFIG_XILINX_MICROBLAZE0_HW_VER))
13CPU_MAJOR := $(shell echo $(CPU_VER) | cut -d '.' -f 1)
14CPU_MINOR := $(shell echo $(CPU_VER) | cut -d '.' -f 2)
15CPU_REV   := $(shell echo $(CPU_VER) | cut -d '.' -f 3)
16
17export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV
18
19# Use cpu-related CONFIG_ vars to set compile options.
20# The various CONFIG_XILINX cpu features options are integers 0/1/2...
21# rather than bools y/n
22
23# Work out HW multipler support. This is tricky.
24# 1. Spartan2 has no HW multipliers.
25# 2. MicroBlaze v3.x always uses them, except in Spartan 2
26# 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings
27ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY)))
28  ifeq ($(CPU_MAJOR),3)
29    CPUFLAGS-1 += -mno-xl-soft-mul
30  else
31    # USE_HW_MUL can be 0, 1, or 2, defining a hierarchy of HW Mul support.
32    CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high
33    CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul
34  endif
35endif
36CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
37CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift
38CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare
39CPUFLAGS-$(CONFIG_BIG_ENDIAN) += -mbig-endian
40CPUFLAGS-$(CONFIG_LITTLE_ENDIAN) += -mlittle-endian
41
42CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
43
44# r31 holds current when in kernel mode
45KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2)
46
47LDFLAGS		:=
48LDFLAGS_vmlinux	:=
49
50head-y := arch/microblaze/kernel/head.o
51libs-y += arch/microblaze/lib/
52core-y += arch/microblaze/kernel/
53core-y += arch/microblaze/mm/
54core-$(CONFIG_PCI) += arch/microblaze/pci/
55
56drivers-$(CONFIG_OPROFILE) += arch/microblaze/oprofile/
57
58boot := arch/microblaze/boot
59
60# Are we making a simpleImage.<boardname> target? If so, crack out the boardname
61DTB:=$(subst simpleImage.,,$(filter simpleImage.%, $(MAKECMDGOALS)))
62
63ifneq ($(DTB),)
64	core-y	+= $(boot)/dts/
65endif
66
67# defines filename extension depending memory management type
68ifeq ($(CONFIG_MMU),)
69MMU := -nommu
70endif
71
72export MMU DTB
73
74all: linux.bin
75
76archclean:
77	$(Q)$(MAKE) $(clean)=$(boot)
78
79linux.bin linux.bin.gz linux.bin.ub: vmlinux
80	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
81
82simpleImage.%: vmlinux
83	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
84
85define archhelp
86  echo '* linux.bin    - Create raw binary'
87  echo '  linux.bin.gz - Create compressed raw binary'
88  echo '  linux.bin.ub - Create U-Boot wrapped raw binary'
89  echo '  simpleImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in'
90  echo '                   - stripped elf with fdt blob'
91  echo '  simpleImage.<dt>.unstrip - full ELF image with fdt blob'
92  echo '  *_defconfig      - Select default config from arch/microblaze/configs'
93  echo ''
94  echo '  Targets with <dt> embed a device tree blob inside the image'
95  echo '  These targets support board with firmware that does not'
96  echo '  support passing a device tree directly. Replace <dt> with the'
97  echo '  name of a dts file from the arch/microblaze/boot/dts/ directory'
98  echo '  (minus the .dts extension).'
99endef
100
101MRPROPER_FILES += $(boot)/simpleImage.*
102