1#
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
111archclean:
112	$(Q)$(MAKE) $(clean)=$(boot)
113
114define archhelp
115  echo '* boot		- Compressed kernel image (arch/alpha/boot/vmlinux.gz)'
116  echo '  bootimage	- SRM bootable image (arch/alpha/boot/bootimage)'
117  echo '  bootpfile	- BOOTP bootable image (arch/alpha/boot/bootpfile)'
118  echo '  bootpzfile	- compressed kernel BOOTP image (arch/alpha/boot/bootpzfile)'
119endef
120