lunaix-os/arch/x86/includes/sys/crx.h

   1 #ifndef __LUNAIX_CRX_H
   2 #define __LUNAIX_CRX_H
   3
   4 #define CR4_PSE36           ( 1UL << 4  )
   5 #define CR4_OSXMMEXCPT      ( 1UL << 10 )
   6 #define CR4_OSFXSR          ( 1UL << 9  )
   7 #define CR4_PCIDE           ( 1UL << 17 )
   8 #define CR4_PGE             ( 1UL << 7  )
   9 #define CR4_LA57            ( 1UL << 12 )
  10
  11 #define CR0_PG              ( 1UL << 31 )
  12 #define CR0_WP              ( 1UL << 16 )
  13 #define CR0_EM              ( 1UL << 2  )
  14 #define CR0_MP              ( 1UL << 1  )
  15
  16 #ifdef CONFIG_ARCH_X86_64
  17
  18 #define crx_addflag(crx, flag)      \
  19     asm(                            \
  20         "movq %%" #crx ", %%rax\n"  \
  21         "orq  %0,    %%rax\n"       \
  22         "movq %%rax, %%" #crx "\n"  \
  23         ::"r"(flag)                 \
  24         :"rax"                      \
  25     );
  26
  27 #define crx_rmflag(crx, flag)       \
  28     asm(                            \
  29         "movq %%" #crx ", %%rax\n"  \
  30         "andq  %0,    %%rax\n"      \
  31         "movq %%rax, %%" #crx "\n"  \
  32         ::"r"(~(flag))              \
  33         :"rax"                      \
  34     );
  35
  36 #else
  37
  38 #define crx_addflag(crx, flag)      \
  39     asm(                            \
  40         "movl %%" #crx ", %%eax\n"  \
  41         "orl  %0,    %%eax\n"       \
  42         "movl %%eax, %%" #crx "\n"  \
  43         ::"r"(flag)                 \
  44         :"eax"                      \
  45     );
  46
  47 #define crx_rmflag(crx, flag)       \
  48     asm(                            \
  49         "movl %%" #crx ", %%eax\n"  \
  50         "andl  %0,    %%eax\n"      \
  51         "movl %%eax, %%" #crx "\n"  \
  52         ::"r"(~(flag))              \
  53         :"eax"                      \
  54     );
  55
  56 #endif
  57
  58 static inline void
  59 cr4_setfeature(unsigned long feature)
  60 {
  61     crx_addflag(cr4, feature);
  62 }
  63
  64 static inline void
  65 cr0_setfeature(unsigned long feature)
  66 {
  67     crx_addflag(cr0, feature);
  68 }
  69
  70 static inline void
  71 cr0_unsetfeature(unsigned long feature)
  72 {
  73     crx_rmflag(cr0, feature);
  74 }
  75
  76 #endif /* __LUNAIX_CR4_H */