/* * linux/arch/i386/kernel/i387.c * * Copyright (C) 1994 Linus Torvalds * * Pentium III FXSR, SSE support * General FPU state handling cleanups * Gareth Hughes , May 2000 */ #include #include #include #include #include #include #include void init_fpu(void) { __asm__ __volatile__ ( "fninit" ); if ( cpu_has_xmm ) load_mxcsr(0x1f80); current->fpu_initialised = 1; } void save_init_fpu(struct vcpu *v) { unsigned long cr0 = read_cr0(); char *fpu_ctxt = v->arch.guest_context.fpu_ctxt.x; /* This can happen, if a paravirtualised guest OS has set its CR0.TS. */ if ( cr0 & X86_CR0_TS ) clts(); if ( cpu_has_fxsr ) { #ifdef __i386__ __asm__ __volatile__ ( "fxsave %0" : "=m" (*fpu_ctxt) ); #else /* __x86_64__ */ /* * The only way to force fxsaveq on a wide range of gas versions. On * older versions the rex64 prefix works only if we force an * addressing mode that doesn't require extended registers. */ __asm__ __volatile__ ( REX64_PREFIX "fxsave (%1)" : "=m" (*fpu_ctxt) : "cdaSDb" (fpu_ctxt) ); #endif /* Clear exception flags if FSW.ES is set. */ if ( unlikely(fpu_ctxt[2] & 0x80) ) __asm__ __volatile__ ("fnclex"); /* * AMD CPUs don't save/restore FDP/FIP/FOP unless an exception * is pending. Clear the x87 state here by setting it to fixed * values. The hypervisor data segment can be sometimes 0 and * sometimes new user value. Both should be ok. Use the FPU saved * data block as a safe address because it should be in L1. */ if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD ) { __asm__ __volatile__ ( "emms\n\t" /* clear stack tags */ "fildl %0" /* load to clear state */ : : "m" (*fpu_ctxt) ); } } else { __asm__ __volatile__ ( "fnsave %0 ; fwait" : "=m" (*fpu_ctxt) ); } v->fpu_dirtied = 0; write_cr0(cr0|X86_CR0_TS); } void restore_fpu(struct vcpu *v) { char *fpu_ctxt = v->arch.guest_context.fpu_ctxt.x; /* * FXRSTOR can fault if passed a corrupted data block. We handle this * possibility, which may occur if the block was passed to us by control * tools, by silently clearing the block. */ if ( cpu_has_fxsr ) { __asm__ __volatile__ ( #ifdef __i386__ "1: fxrstor %0 \n" #else /* __x86_64__ */ /* See above for why the operands/constraints are this way. */ "1: " REX64_PREFIX "fxrstor (%2)\n" #endif ".section .fixup,\"ax\" \n" "2: push %%"__OP"ax \n" " push %%"__OP"cx \n" " push %%"__OP"di \n" " lea %0,%%"__OP"di \n" " mov %1,%%ecx \n" " xor %%eax,%%eax \n" " rep ; stosl \n" " pop %%"__OP"di \n" " pop %%"__OP"cx \n" " pop %%"__OP"ax \n" " jmp 1b \n" ".previous \n" ".section __ex_table,\"a\"\n" " "__FIXUP_ALIGN" \n" " "__FIXUP_WORD" 1b,2b \n" ".previous \n" : : "m" (*fpu_ctxt), "i" (sizeof(v->arch.guest_context.fpu_ctxt)/4) #ifdef __x86_64__ ,"cdaSDb" (fpu_ctxt) #endif ); } else { __asm__ __volatile__ ( "frstor %0" : : "m" (v->arch.guest_context.fpu_ctxt) ); } } /* * Local variables: * mode: C * c-set-style: "BSD" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: nil * End: */ f='#n15'>15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 
# 
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

define Package/Default
  CONFIGFILE:=
  SECTION:=opt
  CATEGORY:=Extra packages
  DEPENDS:=
  MDEPENDS:=
  PROVIDES:=
  EXTRA_DEPENDS:=
  MAINTAINER:=OpenWrt Developers Team <openwrt-devel@openwrt.org>
  SOURCE:=$(patsubst $(TOPDIR)/%,%,$(CURDIR))
  ifneq ($(PKG_VERSION),)
    ifneq ($(PKG_RELEASE),)
      VERSION:=$(PKG_VERSION)-$(PKG_RELEASE)
    else
      VERSION:=$(PKG_VERSION)
    endif
  else
    VERSION:=$(PKG_RELEASE)
  endif
  ifneq ($(PKG_FLAGS),)
    PKGFLAGS:=$(PKG_FLAGS)
  else
    PKGFLAGS:=
  endif
  ifneq ($(ARCH_PACKAGES),)
    PKGARCH:=$(ARCH_PACKAGES)
  else
    PKGARCH:=$(BOARD)
  endif
  PRIORITY:=optional
  DEFAULT:=
  MENU:=
  SUBMENU:=
  SUBMENUDEP:=
  TITLE:=
  KCONFIG:=
  BUILDONLY:=
  HIDDEN:=
  URL:=
  VARIANT:=
endef

Build/Patch:=$(Build/Patch/Default)
ifneq ($(strip $(PKG_UNPACK)),)
  define Build/Prepare/Default
	$(PKG_UNPACK)
	$(Build/Patch)
  endef
endif

EXTRA_CXXFLAGS = $(EXTRA_CFLAGS)

CONFIGURE_PREFIX:=/usr
CONFIGURE_ARGS = \
		--target=$(GNU_TARGET_NAME) \
		--host=$(GNU_TARGET_NAME) \
		--build=$(GNU_HOST_NAME) \
		--program-prefix="" \
		--program-suffix="" \
		--prefix=$(CONFIGURE_PREFIX) \
		--exec-prefix=$(CONFIGURE_PREFIX) \
		--bindir=$(CONFIGURE_PREFIX)/bin \
		--sbindir=$(CONFIGURE_PREFIX)/sbin \
		--libexecdir=$(CONFIGURE_PREFIX)/lib \
		--sysconfdir=/etc \
		--datadir=$(CONFIGURE_PREFIX)/share \
		--localstatedir=/var \
		--mandir=$(CONFIGURE_PREFIX)/man \
		--infodir=$(CONFIGURE_PREFIX)/info \
		$(DISABLE_NLS) \
		$(DISABLE_LARGEFILE) \
		$(DISABLE_IPV6)

CONFIGURE_VARS = \
		$(TARGET_CONFIGURE_OPTS) \
		CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
		CXXFLAGS="$(TARGET_CXXFLAGS) $(EXTRA_CFLAGS)" \
		CPPFLAGS="$(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
		LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS)" \

CONFIGURE_PATH = .
CONFIGURE_CMD = ./configure

replace_script=$(FIND) $(1) -name $(2) | $(XARGS) chmod u+w; $(FIND) $(1) -name $(2) | $(XARGS) -n1 cp $(SCRIPT_DIR)/$(2);

define Build/Configure/Default
	(cd $(PKG_BUILD_DIR)/$(CONFIGURE_PATH)/$(strip $(3)); \
	if [ -x $(CONFIGURE_CMD) ]; then \
		$(call replace_script,$(PKG_BUILD_DIR)/$(3),config.guess) \
		$(call replace_script,$(PKG_BUILD_DIR)/$(3),config.sub) \
		$(CONFIGURE_VARS) \
		$(2) \
		$(CONFIGURE_CMD) \
		$(CONFIGURE_ARGS) \
		$(1); \
	fi; \
	)
endef

MAKE_VARS = \
	CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS) $(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
	CXXFLAGS="$(TARGET_CXXFLAGS) $(EXTRA_CXXFLAGS) $(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
	LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS)"

MAKE_FLAGS = \
	$(TARGET_CONFIGURE_OPTS) \
	CROSS="$(TARGET_CROSS)" \
	ARCH="$(ARCH)"

MAKE_INSTALL_FLAGS = \
	$(MAKE_FLAGS) \
	DESTDIR="$(PKG_INSTALL_DIR)"

MAKE_PATH = .

define Build/Compile/Default
	$(MAKE_VARS) \
	$(MAKE) $(PKG_JOBS) -C $(PKG_BUILD_DIR)/$(MAKE_PATH) \
		$(MAKE_FLAGS) \
		$(1);
endef

define Build/Install/Default
	$(MAKE_VARS) \
	$(MAKE) -C $(PKG_BUILD_DIR)/$(MAKE_PATH) \
		$(MAKE_INSTALL_FLAGS) \
		$(if $(1), $(1), install);
endef

define Build/Dist/Default
	$(call Build/Compile/Default, DESTDIR="$(PKG_BUILD_DIR)/tmp" CC="$(TARGET_CC)" dist)
endef

define Build/DistCheck/Default
	$(call Build/Compile/Default, DESTDIR="$(PKG_BUILD_DIR)/tmp" CC="$(TARGET_CC)" distcheck)
endef
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-25 17:04:44 +0000