arch/alpha/Makefile

   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
  11 NM := $(NM) -B
  12
  13 LDFLAGS_vmlinux := -static -N #-relax
  14 CHECKFLAGS      += -D__alpha__ -m64
  15 cflags-y        := -pipe -mno-fp-regs -ffixed-8
  16
  17 # Determine if we can use the BWX instructions with GAS.
  18 old_gas := $(shell if $(AS) --version 2>&1 | grep 'version 2.7' > /dev/null; then echo y; else echo n; fi)
  19
  20 ifeq ($(old_gas),y)
  21 $(error The assembler '$(AS)' does not support the BWX instruction)
  22 endif
  23
  24 # Determine if GCC understands the -mcpu= option.
  25 have_mcpu        := $(call cc-option-yn, -mcpu=ev5)
  26 have_mcpu_pca56  := $(call cc-option-yn, -mcpu=pca56)
  27 have_mcpu_ev6    := $(call cc-option-yn, -mcpu=ev6)
  28 have_mcpu_ev67   := $(call cc-option-yn, -mcpu=ev67)
  29 have_msmall_data := $(call cc-option-yn, -msmall-data)
  30
  31 cflags-$(have_msmall_data) += -msmall-data
  32
  33 # Turn on the proper cpu optimizations.
  34 ifeq ($(have_mcpu),y)
  35   mcpu_done := n
  36   # If GENERIC, make sure to turn off any instruction set extensions that
  37   # the host compiler might have on by default.  Given that EV4 and EV5
  38   # have the same instruction set, prefer EV5 because an EV5 schedule is
  39   # more likely to keep an EV4 processor busy than vice-versa.
  40   ifeq ($(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)
  81 endif
  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.
  87 CFLAGS += $(cflags-y) -Wa,-mev6
  88
  89 head-y := arch/alpha/kernel/head.o
  90
  91 core-y                          += arch/alpha/kernel/ arch/alpha/mm/
  92 core-$(CONFIG_MATHEMU)          += arch/alpha/math-emu/
  93 drivers-$(CONFIG_OPROFILE)      += arch/alpha/oprofile/
  94 libs-y                          += arch/alpha/lib/
  95
  96 # export what is needed by arch/alpha/boot/Makefile
  97 LIBS_Y := $(patsubst %/, %/lib.a, $(libs-y))
  98 export LIBS_Y
  99
 100 boot := arch/alpha/boot
 101
 102 #Default target when executing make with no arguments
 103 all boot: $(boot)/vmlinux.gz
 104
 105 $(boot)/vmlinux.gz: vmlinux
 106         $(Q)$(MAKE) $(build)=$(boot) $@
 107
 108 bootimage bootpfile bootpzfile: vmlinux
 109         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 110
 111 archclean:
 112         $(Q)$(MAKE) $(clean)=$(boot)
 113
 114 define 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)'
 119 endef