Factor out common CAR asm snippets.

This makes the CAR implementations a lot more readable, shorter and
easier to follow, and also reduces the amount of uselessly duplicated code.

For example there are more than 12 open-coded "enable cache" instances
spread all over the place (and 12 "disable cache" ones), multiple
"enable mtrr", "save BIST", "restore BIST", etc. etc.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5902 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/src/cpu/amd/car/cache_as_ram.inc b/src/cpu/amd/car/cache_as_ram.inc
index 81c3481eee84804781de9c98c128449e3816dd67..a7bce9e91bc5d7d82a51897339f8c1e1e77fef55 100644 (file)
--- a/src/cpu/amd/car/cache_as_ram.inc
+++ b/src/cpu/amd/car/cache_as_ram.inc
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <cpu/x86/car.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/amd/mtrr.h>
 
@@ -45,8 +46,7 @@
  *   xmm3: Backup EBX
  */
 
-       /* Save the BIST result. */
-       movl    %eax, %ebp
+       save_bist_result()
 
        /*
         * For normal part %ebx already contain cpu_init_detected
@@ -56,10 +56,7 @@
 cache_as_ram_setup:
        post_code(0xa0)
 
-       /* Enable SSE. */
-       movl    %cr4, %eax
-       orl     $(3 << 9), %eax
-       movl    %eax, %cr4
+       enable_sse()
 
        /* Figure out the CPU family. */
        cvtsi2sd %ebx, %xmm3
@@ -299,10 +296,7 @@ wbcache_post_fam10_setup:
 
        post_code(0xa1)
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        jmp_if_k8(fam10_end_part1)
 
@@ -384,13 +378,9 @@ CAR_FAM10_ap_out:
 
        post_code(0xa5)
 
-       /* Disable SSE. */
-       movl    %cr4, %eax
-       andl    $~(3 << 9), %eax
-       movl    %eax, %cr4
+       disable_sse()
 
-       /* Restore the BIST result. */
-       movl    %ebp, %eax
+       restore_bist_result()
 
        /* We need to set EBP? No need. */
        movl    %esp, %ebp

diff --git a/src/cpu/intel/car/cache_as_ram.inc b/src/cpu/intel/car/cache_as_ram.inc
index 8491d86db20748f205063fd60c65e188de26b1b1..6ff02871867cee03bd277bea6717176b092f38cf 100644 (file)
--- a/src/cpu/intel/car/cache_as_ram.inc
+++ b/src/cpu/intel/car/cache_as_ram.inc
@@ -21,6 +21,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <cpu/x86/car.h>
 #include <cpu/x86/stack.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/x86/lapic_def.h>
@@ -28,8 +29,7 @@
 #define CacheSize              CONFIG_DCACHE_RAM_SIZE
 #define CacheBase              (0xd0000 - CacheSize)
 
-       /* Save the BIST result. */
-       movl    %eax, %ebp
+       save_bist_result()
 
 CacheAsRam:
        /* Check whether the processor has HT capability. */
@@ -231,10 +231,7 @@ clear_fixed_var_mtrr_out:
        wrmsr
 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        /* Read the range with lodsl. */
        movl    $CacheBase, %esi
@@ -295,8 +292,7 @@ clear_fixed_var_mtrr_out:
        movl    $(CacheBase + CacheSize - 4), %eax
        movl    %eax, %esp
 lout:
-       /* Restore the BIST result. */
-       movl    %ebp, %eax
+       restore_bist_result()
 
        /* We need to set EBP? No need. */
        movl    %esp, %ebp
@@ -305,10 +301,7 @@ lout:
 
        /* We don't need CAR from now on. */
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        /* Clear sth. */
        movl    $MTRRfix4K_C8000_MSR, %ecx
@@ -330,10 +323,7 @@ lout:
        movl    $0x00000800, %eax /* Enable variable and disable fixed MTRRs. */
        wrmsr
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache();
 
        /* Clear boot_complete flag. */
        xorl    %ebp, %ebp

diff --git a/src/cpu/intel/model_106cx/cache_as_ram.inc b/src/cpu/intel/model_106cx/cache_as_ram.inc
index 87b465e9283f25938d2338e0867ab937b24c9905..03e0c2671c17cb9cd3c33f86a19436434ba9ed4b 100644 (file)
--- a/src/cpu/intel/model_106cx/cache_as_ram.inc
+++ b/src/cpu/intel/model_106cx/cache_as_ram.inc
@@ -18,14 +18,14 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <cpu/x86/car.h>
 #include <cpu/x86/stack.h>
 #include <cpu/x86/mtrr.h>
 
 #define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
 #define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
 
-       /* Save the BIST result. */
-       movl    %eax, %ebp
+       save_bist_result()
 
 cache_as_ram:
        post_code(0x20)
@@ -66,19 +66,12 @@ clear_mtrrs:
        xorl    %edx, %edx
        wrmsr
 
-       /* Enable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       orl     $(1 << 11), %eax
-       wrmsr
+       enable_mtrr()
 
-       /* Enable L2 cache. */
-       movl    $0x11e, %ecx
-       rdmsr
-       orl     $(1 << 8), %eax
-       wrmsr
+       enable_l2_cache()
 
        /* Enable cache (CR0.CD = 0, CR0.NW = 0). */
+       /* TODO: enable_cache()? But that doesn't have "invd". */
         movl   %cr0, %eax
        andl    $(~((1 << 30) | (1 << 29))), %eax
        invd
@@ -93,9 +86,7 @@ clear_mtrrs:
        rep     stosl
 
        /* Enable Cache-as-RAM mode by disabling cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
        /* Enable cache for our code in Flash because we do XIP here */
@@ -116,10 +107,7 @@ clear_mtrrs:
        wrmsr
 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        /* Set up the stack pointer. */
 #if defined(CONFIG_USBDEBUG) && (CONFIG_USBDEBUG == 1)
@@ -130,8 +118,8 @@ clear_mtrrs:
 #endif
        movl    %eax, %esp
 
-       /* Restore the BIST result. */
-       movl    %ebp, %eax
+       restore_bist_result()
+
        movl    %esp, %ebp
        pushl   %eax
 
@@ -144,18 +132,11 @@ clear_mtrrs:
 
        post_code(0x30)
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        post_code(0x31)
 
-       /* Disable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       andl    $(~(1 << 11)), %eax
-       wrmsr
+       disable_mtrr()
 
        post_code(0x31)
 
@@ -175,17 +156,11 @@ clear_mtrrs:
 
        post_code(0x33)
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $~((1 << 30) | (1 << 29)), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        post_code(0x36)
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        post_code(0x38)
 
@@ -202,17 +177,11 @@ clear_mtrrs:
        post_code(0x39)
 
        /* And enable cache again after setting MTRRs. */
-       movl    %cr0, %eax
-       andl    $~((1 << 30) | (1 << 29)), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        post_code(0x3a)
 
-       /* Enable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       orl     $(1 << 11), %eax
-       wrmsr
+       enable_mtrr()
 
        post_code(0x3b)
 

diff --git a/src/cpu/intel/model_6ex/cache_as_ram.inc b/src/cpu/intel/model_6ex/cache_as_ram.inc
index dbc7cdc583cd6b08af1e18213e8db9483d07c59c..6d88e7b8e52c37c9440caf9c0e1c8d7edaa85ba9 100644 (file)
--- a/src/cpu/intel/model_6ex/cache_as_ram.inc
+++ b/src/cpu/intel/model_6ex/cache_as_ram.inc
@@ -18,14 +18,14 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <cpu/x86/car.h>
 #include <cpu/x86/stack.h>
 #include <cpu/x86/mtrr.h>
 
 #define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
 #define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
 
-       /* Save the BIST result. */
-       movl    %eax, %ebp
+       save_bist_result()
 
 cache_as_ram:
        post_code(0x20)
@@ -66,19 +66,12 @@ clear_mtrrs:
        movl    $0x0000000f, %edx
        wrmsr
 
-       /* Enable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       orl     $(1 << 11), %eax
-       wrmsr
+       enable_mtrr()
 
-       /* Enable L2 cache. */
-       movl    $0x11e, %ecx
-       rdmsr
-       orl     $(1 << 8), %eax
-       wrmsr
+       enable_l2_cache()
 
        /* Enable cache (CR0.CD = 0, CR0.NW = 0). */
+       /* TODO: enable_cache()? But that doesn't have "invd". */
         movl   %cr0, %eax
        andl    $(~((1 << 30) | (1 << 29))), %eax
        invd
@@ -93,9 +86,7 @@ clear_mtrrs:
        rep     stosl
 
        /* Enable Cache-as-RAM mode by disabling cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
        /* Enable cache for our code in Flash because we do XIP here */
@@ -116,10 +107,7 @@ clear_mtrrs:
        wrmsr
 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        /* Set up the stack pointer. */
 #if defined(CONFIG_USBDEBUG) && (CONFIG_USBDEBUG == 1)
@@ -130,8 +118,8 @@ clear_mtrrs:
 #endif
        movl    %eax, %esp
 
-       /* Restore the BIST result. */
-       movl    %ebp, %eax
+       restore_bist_result()
+
        movl    %esp, %ebp
        pushl   %eax
 
@@ -144,18 +132,11 @@ clear_mtrrs:
 
        post_code(0x30)
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        post_code(0x31)
 
-       /* Disable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       andl    $(~(1 << 11)), %eax
-       wrmsr
+       disable_mtrr()
 
        post_code(0x31)
 
@@ -175,17 +156,11 @@ clear_mtrrs:
 
        post_code(0x33)
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $~((1 << 30) | (1 << 29)), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        post_code(0x36)
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        post_code(0x38)
 
@@ -202,17 +177,11 @@ clear_mtrrs:
        post_code(0x39)
 
        /* And enable cache again after setting MTRRs. */
-       movl    %cr0, %eax
-       andl    $~((1 << 30) | (1 << 29)), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        post_code(0x3a)
 
-       /* Enable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       orl     $(1 << 11), %eax
-       wrmsr
+       enable_mtrr()
 
        post_code(0x3b)
 

diff --git a/src/cpu/intel/model_6fx/cache_as_ram.inc b/src/cpu/intel/model_6fx/cache_as_ram.inc
index 74314c2571d49a017eb149dfe466f842593c6ee2..526d24520d2532a20bd7f4aea013437c0867ea14 100644 (file)
--- a/src/cpu/intel/model_6fx/cache_as_ram.inc
+++ b/src/cpu/intel/model_6fx/cache_as_ram.inc
@@ -18,14 +18,14 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <cpu/x86/car.h>
 #include <cpu/x86/stack.h>
 #include <cpu/x86/mtrr.h>
 
 #define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
 #define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
 
-       /* Save the BIST result. */
-       movl    %eax, %ebp
+       save_bist_result()
 
 cache_as_ram:
        post_code(0x20)
@@ -73,19 +73,12 @@ clear_mtrrs:
        movl    $0x0000000f, %edx
        wrmsr
 
-       /* Enable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       orl     $(1 << 11), %eax
-       wrmsr
+       enable_mtrr()
 
-       /* Enable L2 cache. */
-       movl    $0x11e, %ecx
-       rdmsr
-       orl     $(1 << 8), %eax
-       wrmsr
+       enable_l2_cache()
 
        /* Enable cache (CR0.CD = 0, CR0.NW = 0). */
+       /* TODO: enable_cache()? But that doesn't have "invd". */
         movl   %cr0, %eax
        andl    $(~((1 << 30) | (1 << 29))), %eax
        invd
@@ -100,9 +93,7 @@ clear_mtrrs:
        rep     stosl
 
        /* Enable Cache-as-RAM mode by disabling cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
        /* Enable cache for our code in Flash because we do XIP here */
@@ -123,10 +114,7 @@ clear_mtrrs:
        wrmsr
 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        /* Set up the stack pointer. */
 #if defined(CONFIG_USBDEBUG) && (CONFIG_USBDEBUG == 1)
@@ -137,8 +125,8 @@ clear_mtrrs:
 #endif
        movl    %eax, %esp
 
-       /* Restore the BIST result. */
-       movl    %ebp, %eax
+       restore_bist_result()
+
        movl    %esp, %ebp
        pushl   %eax
 
@@ -151,18 +139,11 @@ clear_mtrrs:
 
        post_code(0x30)
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        post_code(0x31)
 
-       /* Disable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       andl    $(~(1 << 11)), %eax
-       wrmsr
+       disable_mtrr()
 
        post_code(0x31)
 
@@ -182,17 +163,11 @@ clear_mtrrs:
 
        post_code(0x33)
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $~((1 << 30) | (1 << 29)), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        post_code(0x36)
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        post_code(0x38)
 
@@ -209,17 +184,11 @@ clear_mtrrs:
        post_code(0x39)
 
        /* And enable cache again after setting MTRRs. */
-       movl    %cr0, %eax
-       andl    $~((1 << 30) | (1 << 29)), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        post_code(0x3a)
 
-       /* Enable MTRR. */
-       movl    $MTRRdefType_MSR, %ecx
-       rdmsr
-       orl     $(1 << 11), %eax
-       wrmsr
+       enable_mtrr()
 
        post_code(0x3b)
 

diff --git a/src/cpu/via/car/cache_as_ram.inc b/src/cpu/via/car/cache_as_ram.inc
index 6bd2c0f393ccbdc241bd4fe7c354d82f673c57f2..be00fe30dca24413632d46b3ddb0020a18c57a6e 100644 (file)
--- a/src/cpu/via/car/cache_as_ram.inc
+++ b/src/cpu/via/car/cache_as_ram.inc
@@ -25,21 +25,18 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <cpu/x86/car.h>
 #include <cpu/x86/stack.h>
 #include <cpu/x86/mtrr.h>
 
 #define CacheSize              CONFIG_DCACHE_RAM_SIZE
 #define CacheBase              CONFIG_DCACHE_RAM_BASE
 
-       /* Save the BIST result. */
-       movl    %eax, %ebp
+       save_bist_result()
 
 CacheAsRam:
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
        invd
 
        /* Set the default memory type and enable fixed and variable MTRRs. */
@@ -116,10 +113,7 @@ clear_fixed_var_mtrr_out:
        movl    $(MTRRdefTypeEn), %eax
        wrmsr
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache()
 
        /* Read the range with lodsl. */
        cld
@@ -175,8 +169,7 @@ testok:
        jne     stackerr
 #endif
 
-       /* Restore the BIST result. */
-       movl    %ebp, %eax
+       restore_bist_result()
 
        /* We need to set EBP? No need. */
        movl    %esp, %ebp
@@ -191,10 +184,7 @@ testok:
 
        /* We don't need CAR from now on. */
 
-       /* Disable cache. */
-       movl    %cr0, %eax
-       orl     $(1 << 30), %eax
-       movl    %eax, %cr0
+       disable_cache()
 
        /* Set the default memory type and enable variable MTRRs. */
        /* TODO: Or also enable fixed MTRRs? Bug in the code? */
@@ -253,10 +243,7 @@ testok:
        movl    $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax
        wrmsr
 
-       /* Enable cache. */
-       movl    %cr0, %eax
-       andl    $(~((1 << 30) | (1 << 29))), %eax
-       movl    %eax, %cr0
+       enable_cache()
        invd
 
        /* Clear boot_complete flag. */

diff --git a/src/include/cpu/x86/car.h b/src/include/cpu/x86/car.h
new file mode 100644 (file)
index 0000000..45c62c6
--- /dev/null
+++ b/src/include/cpu/x86/car.h
@@ -0,0 +1,75 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com>
+ * Copyright (C) 2007-2008 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <cpu/x86/mtrr.h>
+
+/* Save the BIST result. */
+#define save_bist_result() \
+       movl    %eax, %ebp
+
+/* Restore the BIST result. */
+#define restore_bist_result() \
+       movl    %ebp, %eax
+
+/* Enable cache. */
+#define enable_cache() \
+       movl    %cr0, %eax; \
+       andl    $(~((1 << 30) | (1 << 29))), %eax; \
+       movl    %eax, %cr0
+
+/* Disable cache. */
+#define disable_cache() \
+       movl    %cr0, %eax; \
+       orl     $(1 << 30), %eax; \
+       movl    %eax, %cr0
+
+/* Enable MTRR. */
+#define enable_mtrr() \
+       movl    $MTRRdefType_MSR, %ecx; \
+       rdmsr; \
+       orl     $(1 << 11), %eax; \
+       wrmsr
+
+/* Disable MTRR. */
+#define disable_mtrr() \
+       movl    $MTRRdefType_MSR, %ecx; \
+       rdmsr; \
+       andl    $(~(1 << 11)), %eax; \
+       wrmsr
+
+/* Enable L2 cache. */
+#define enable_l2_cache() \
+       movl    $0x11e, %ecx; \
+       rdmsr; \
+       orl     $(1 << 8), %eax; \
+       wrmsr
+
+/* Enable SSE. */
+#define enable_sse() \
+       movl    %cr4, %eax; \
+       orl     $(3 << 9), %eax; \
+       movl    %eax, %cr4
+
+/* Disable SSE. */
+#define disable_sse() \
+       movl    %cr4, %eax; \
+       andl    $~(3 << 9), %eax; \
+       movl    %eax, %cr4
+