aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-i386/processor.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-i386/processor.h')
-rw-r--r--include/asm-i386/processor.h22
1 files changed, 9 insertions, 13 deletions
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index d0d8b016009..7e17d3b4f65 100644
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -203,9 +203,7 @@ static inline unsigned int cpuid_edx(unsigned int op)
203 return edx; 203 return edx;
204} 204}
205 205
206#define load_cr3(pgdir) \ 206#define load_cr3(pgdir) write_cr3(__pa(pgdir))
207 asm volatile("movl %0,%%cr3": :"r" (__pa(pgdir)))
208
209 207
210/* 208/*
211 * Intel CPU features in CR4 209 * Intel CPU features in CR4
@@ -232,22 +230,20 @@ extern unsigned long mmu_cr4_features;
232 230
233static inline void set_in_cr4 (unsigned long mask) 231static inline void set_in_cr4 (unsigned long mask)
234{ 232{
233 unsigned cr4;
235 mmu_cr4_features |= mask; 234 mmu_cr4_features |= mask;
236 __asm__("movl %%cr4,%%eax\n\t" 235 cr4 = read_cr4();
237 "orl %0,%%eax\n\t" 236 cr4 |= mask;
238 "movl %%eax,%%cr4\n" 237 write_cr4(cr4);
239 : : "irg" (mask)
240 :"ax");
241} 238}
242 239
243static inline void clear_in_cr4 (unsigned long mask) 240static inline void clear_in_cr4 (unsigned long mask)
244{ 241{
242 unsigned cr4;
245 mmu_cr4_features &= ~mask; 243 mmu_cr4_features &= ~mask;
246 __asm__("movl %%cr4,%%eax\n\t" 244 cr4 = read_cr4();
247 "andl %0,%%eax\n\t" 245 cr4 &= ~mask;
248 "movl %%eax,%%cr4\n" 246 write_cr4(cr4);
249 : : "irg" (~mask)
250 :"ax");
251} 247}
252 248
253/* 249/*