Makefile.arm revision 1.50 
1#	$NetBSD: Makefile.arm,v 1.50 2019/08/26 17:18:42 rin Exp $
2
3# Makefile for NetBSD
4#
5# This makefile is constructed from a machine description:
6#	config machineid
7# Most changes should be made in the machine description
8#	/sys/arch/<arch>/conf/``machineid''
9# after which you should do
10#	config machineid
11# Machine generic makefile changes should be made in
12#	/sys/arch/arm/conf/Makefile.arm
13# after which config should be rerun for all machines of that type.
14#
15# To specify debugging, add the config line: makeoptions DEBUG="-g"
16# A better way is to specify -g only for a few files.
17#
18#	makeoptions DEBUGLIST="uvm* trap if_*"
19
20USETOOLS?=	no
21NEED_OWN_INSTALL_TARGET?=no
22.include <bsd.own.mk>
23
24##
25## (1) port identification
26##
27THISARM=	$S/arch/${MACHINE}
28ARM=		$S/arch/arm
29GENASSYM_CONF=	${ARM}/arm32/genassym.cf
30.-include "$S/arch/${MACHINE}/conf/Makefile.${MACHINE}.inc"
31
32##
33## (2) compile settings
34##
35# CPPFLAGS set by platform-specific Makefile fragment.
36AFLAGS+=	-x assembler-with-cpp
37COPTS.arm32_kvminit.c+=		-fno-stack-protector
38COPTS.vfp_init.c=		-mfpu=vfp
39AFLAGS.bcopyinout.S+=-marm
40AFLAGS.cpuswitch.S+=-marm -mfpu=vfp
41AFLAGS.locore.S+=-marm
42AFLAGS.fusu.S+=-marm
43AFLAGS.exception.S+=-marm
44AFLAGS.irq_dispatch.S+=-marm
45AFLAGS.blockio.S+=-marm
46AFLAGS.copystr.S+=-marm
47CFLAGS+=	 -mfloat-abi=soft
48
49# This files use instructions deprecated for ARMv7+, but still
50# included in kernel that build with higher -mcpu=... settings.
51CPPFLAGS.cpufunc_asm_armv4.S+=	-mcpu=arm8
52CPPFLAGS.cpufunc_asm_armv6.S+=	-mcpu=arm1136j-s
53CPPFLAGS.cpufunc_asm_arm11.S+=	-mcpu=arm1136j-s
54CPPFLAGS.cpufunc_asm_xscale.S+=	-mcpu=xscale
55
56.if !empty(MACHINE_ARCH:Mearmv6*) || !empty(MACHINE_ARCH:Mearmv7*)
57# XXX
58#
59# Workaround for alignment faults on ARMv6+, at least occur with
60# axe(4) and athn(4) drivers.
61#
62# For ARMv6+, unaligned access is enabled by default. However, it
63# cannot be used for non-cacheable memory, which is used as DMA
64# buffers. This results in alignment faults above. A real fix is
65# to use cacheable memory as DMA buffers. However, it breaks some
66# drivers, awge(4) and vchiq(4) at least.
67#
68# Until we figure out problems and fix them, we choose a fail-safe
69# workaround here; forbid unaligned memory access for whole kernel.
70# Affects on performance is negligibly small as far as we can see.
71#
72# See PR kern/54486 for more details.
73CFLAGS+=	-mno-unaligned-access
74.endif
75
76##
77## (3) libkern and compat
78##
79OPT_MODULAR=	%MODULAR%
80
81##
82## (4) local objects, compile rules, and dependencies
83##
84MD_OBJS+=	${SYSTEM_FIRST_OBJ} locore.o
85MD_CFILES+=
86MD_SFILES+=	${SYSTEM_FIRST_SFILE} ${ARM}/arm32/locore.S
87
88.if defined(SYSTEM_FIRST_OBJ)
89${SYSTEM_FIRST_OBJ}: ${SYSTEM_FIRST_SFILE} assym.h
90	${NORMAL_S}
91.endif
92
93locore.o: ${ARM}/arm32/locore.S assym.h
94	${NORMAL_S}
95
96##
97## (5) link settings
98##
99LOADADDRESS?=	0xF0000000
100LINKFLAGS_NORMAL=	-X
101# Strip ARM mapping symbols from the kernel image, as they interfere
102# with ddb. Do it differently if 'makeoptions DEBUG="-g"' was specified.
103.if !defined(DEBUG) || empty(DEBUG:M-g*)
104SYSTEM_LD_TAIL?=	${OBJCOPY} --wildcard --strip-symbol='[$$][atd]' \
105				    --strip-symbol='[$$][atd]\.*' $@;   \
106			${SIZE} $@; chmod 755 $@
107.else
108STRIPFLAGS=-g --wildcard --strip-symbol='[$$][atd]' \
109	   --strip-symbol='[$$][atd]\.*'
110.endif
111
112##
113## (6) port specific target dependencies
114##
115
116# depend on CPU configuration
117cpufunc.o cpufunc_asm.o: Makefile
118
119# depend on DIAGNOSTIC etc.
120cpuswitch.o fault.o machdep.o: Makefile
121
122# various assembly files that depend on assym.h
123atomic.o bcopy_page.o bcopyinout.o copystr.o cpuswitch.o cpu_in_cksum.o: assym.h
124exception.o fiq_subr.o fusu.o irq_dispatch.o isa_irq.o sigcode.o: assym.h
125spl.o vectors.o: assym.h
126
127##
128## (7) misc settings
129##
130
131##
132## (8) config(8) generated machinery
133##
134%INCLUDES
135
136%OBJS
137
138%CFILES
139
140%SFILES
141
142%LOAD
143
144%RULES
145
146##
147## (9) after the config file is inserted
148##
149
150.for f in ${SFILES:T:Mcpufunc_asm*}
151AFLAGS.${f}+=-marm
152.endfor
153
154##
155## (10) port independent kernel machinery
156##
157
158.include "$S/conf/Makefile.kern.inc"
159
160##
161## (11) Appending make options.
162##
163%MAKEOPTIONSAPPEND
164