x86: Add processor flags header from linux

[karo-tx-uboot.git] / arch / i386 / cpu / cpu.c

diff --git a/arch/i386/cpu/cpu.c b/arch/i386/cpu/cpu.c
index 1dcbb983f5c62e2ca14a1d4d74e64fea2a933f19..e96380aa926e582bdd914e8134f0e89ddc1f1202 100644 (file)
--- a/arch/i386/cpu/cpu.c
+++ b/arch/i386/cpu/cpu.c
@@ -36,6 +36,7 @@
 #include <common.h>
 #include <command.h>
 #include <asm/processor.h>
+#include <asm/processor-flags.h>
 #include <asm/interrupt.h>
 
 /* Constructor for a conventional segment GDT (or LDT) entry */
@@ -88,12 +89,16 @@ static void reload_gdt(void)
 
 int cpu_init_f(void)
 {
+       const u32 em_rst = ~X86_CR0_EM;
+       const u32 mp_ne_set = X86_CR0_MP | X86_CR0_NE;
+
        /* initialize FPU, reset EM, set MP and NE */
        asm ("fninit\n" \
-            "movl %cr0, %eax\n" \
-            "andl $~0x4, %eax\n" \
-            "orl  $0x22, %eax\n" \
-            "movl %eax, %cr0\n" );
+            "movl %%cr0, %%eax\n" \
+            "andl %0, %%eax\n" \
+            "orl  %1, %%eax\n" \
+            "movl %%eax, %%cr0\n" \
+            : : "i" (em_rst), "i" (mp_ne_set) : "eax");
 
        return 0;
 }