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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# alpha/Makefile
3#
4# This file is subject to the terms and conditions of the GNU General Public
5# License. See the file "COPYING" in the main directory of this archive
6# for more details.
7#
8# Copyright (C) 1994 by Linus Torvalds
9#
10
11NM := $(NM) -B
12
13LDFLAGS_vmlinux := -static -N #-relax
14CHECKFLAGS += -D__alpha__ -m64
15cflags-y := -pipe -mno-fp-regs -ffixed-8
16
17# Determine if we can use the BWX instructions with GAS.
18old_gas := $(shell if $(AS) --version 2>&1 | grep 'version 2.7' > /dev/null; then echo y; else echo n; fi)
19
20ifeq ($(old_gas),y)
21$(error The assembler '$(AS)' does not support the BWX instruction)
22endif
23
24# Determine if GCC understands the -mcpu= option.
25have_mcpu := $(call cc-option-yn, -mcpu=ev5)
26have_mcpu_pca56 := $(call cc-option-yn, -mcpu=pca56)
27have_mcpu_ev6 := $(call cc-option-yn, -mcpu=ev6)
28have_mcpu_ev67 := $(call cc-option-yn, -mcpu=ev67)
29have_msmall_data := $(call cc-option-yn, -msmall-data)
30
31cflags-$(have_msmall_data) += -msmall-data
32
33# Turn on the proper cpu optimizations.
34ifeq ($(have_mcpu),y)
35 mcpu_done := n
36 # If GENERIC, make sure to turn off any instruction set extensions that
37 # the host compiler might have on by default. Given that EV4 and EV5
38 # have the same instruction set, prefer EV5 because an EV5 schedule is
39 # more likely to keep an EV4 processor busy than vice-versa.
40 ifeq ($(CONFIG_ALPHA_GENERIC),y)
41 mcpu := ev5
42 mcpu_done := y
43 endif
44 ifeq ($(mcpu_done)$(CONFIG_ALPHA_SX164)$(have_mcpu_pca56),nyy)
45 mcpu := pca56
46 mcpu_done := y
47 endif
48 ifeq ($(mcpu_done)$(CONFIG_ALPHA_POLARIS)$(have_mcpu_pca56),nyy)
49 mcpu := pca56
50 mcpu_done := y
51 endif
52 ifeq ($(mcpu_done)$(CONFIG_ALPHA_EV4),ny)
53 mcpu := ev4
54 mcpu_done := y
55 endif
56 ifeq ($(mcpu_done)$(CONFIG_ALPHA_EV56),ny)
57 mcpu := ev56
58 mcpu_done := y
59 endif
60 ifeq ($(mcpu_done)$(CONFIG_ALPHA_EV5),ny)
61 mcpu := ev5
62 mcpu_done := y
63 endif
64 ifeq ($(mcpu_done)$(CONFIG_ALPHA_EV67)$(have_mcpu_ev67),nyy)
65 mcpu := ev67
66 mcpu_done := y
67 endif
68 ifeq ($(mcpu_done)$(CONFIG_ALPHA_EV6),ny)
69 ifeq ($(have_mcpu_ev6),y)
70 mcpu := ev6
71 else
72 ifeq ($(have_mcpu_pca56),y)
73 mcpu := pca56
74 else
75 mcpu=ev56
76 endif
77 endif
78 mcpu_done := y
79 endif
80 cflags-$(mcpu_done) += -mcpu=$(mcpu)
81endif
82
83
84# For TSUNAMI, we must have the assembler not emulate our instructions.
85# The same is true for IRONGATE, POLARIS, PYXIS.
86# BWX is most important, but we don't really want any emulation ever.
87CFLAGS += $(cflags-y) -Wa,-mev6
88
89head-y := arch/alpha/kernel/head.o
90
91core-y += arch/alpha/kernel/ arch/alpha/mm/
92core-$(CONFIG_MATHEMU) += arch/alpha/math-emu/
93drivers-$(CONFIG_OPROFILE) += arch/alpha/oprofile/
94libs-y += arch/alpha/lib/
95
96# export what is needed by arch/alpha/boot/Makefile
97LIBS_Y := $(patsubst %/, %/lib.a, $(libs-y))
98export LIBS_Y
99
100boot := arch/alpha/boot
101
102#Default target when executing make with no arguments
103all boot: $(boot)/vmlinux.gz
104
105$(boot)/vmlinux.gz: vmlinux
106 $(Q)$(MAKE) $(build)=$(boot) $@
107
108bootimage bootpfile bootpzfile: vmlinux
109 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
110
111
112prepare: include/asm-$(ARCH)/asm_offsets.h
113
114arch/$(ARCH)/kernel/asm-offsets.s: include/asm include/linux/version.h \
115 include/config/MARKER
116
117include/asm-$(ARCH)/asm_offsets.h: arch/$(ARCH)/kernel/asm-offsets.s
118 $(call filechk,gen-asm-offsets)
119
120archclean:
121 $(Q)$(MAKE) $(clean)=$(boot)
122
123CLEAN_FILES += include/asm-$(ARCH)/asm_offsets.h
124
125define archhelp
126 echo '* boot - Compressed kernel image (arch/alpha/boot/vmlinux.gz)'
127 echo ' bootimage - SRM bootable image (arch/alpha/boot/bootimage)'
128 echo ' bootpfile - BOOTP bootable image (arch/alpha/boot/bootpfile)'
129 echo ' bootpzfile - compressed kernel BOOTP image (arch/alpha/boot/bootpzfile)'
130endef