diff options
Diffstat (limited to 'arch/x86_64/src/cpu/registers.cpp')
| -rw-r--r-- | arch/x86_64/src/cpu/registers.cpp | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/arch/x86_64/src/cpu/registers.cpp b/arch/x86_64/src/cpu/registers.cpp deleted file mode 100644 index d59776b..0000000 --- a/arch/x86_64/src/cpu/registers.cpp +++ /dev/null @@ -1,64 +0,0 @@ -#include "x86_64/cpu/registers.hpp" - -#include <type_traits> - -namespace teachos::cpu::x86_64 -{ - auto read_control_register(control_register cr) -> uint64_t - { - uint64_t current_value{}; - switch (cr) - { - case control_register::cr0: - asm volatile("mov %%cr0, %[output]" : [output] "=r"(current_value)); - break; - case control_register::cr2: - asm volatile("mov %%cr2, %[output]" : [output] "=r"(current_value)); - break; - case control_register::cr3: - asm volatile("mov %%cr3, %[output]" : [output] "=r"(current_value)); - break; - case control_register::cr4: - asm volatile("mov %%cr4, %[output]" : [output] "=r"(current_value)); - break; - } - return current_value; - } - - auto write_control_register(control_register cr, uint64_t new_value) -> void - { - switch (cr) - { - case control_register::cr0: - asm volatile("mov %[input], %%cr0" - : /* no output from call */ - : [input] "r"(new_value) - : "memory"); - break; - case control_register::cr2: - asm volatile("mov %[input], %%cr2" - : /* no output from call */ - : [input] "r"(new_value) - : "memory"); - break; - case control_register::cr3: - asm volatile("mov %[input], %%cr3" - : /* no output from call */ - : [input] "r"(new_value) - : "memory"); - break; - case control_register::cr4: - asm volatile("mov %[input], %%cr4" - : /* no output from call */ - : [input] "r"(new_value) - : "memory"); - break; - } - } - - auto set_cr0_bit(cr0_flags flag) -> void - { - auto const cr0 = read_control_register(control_register::cr0); - write_control_register(control_register::cr0, static_cast<std::underlying_type_t<cr0_flags>>(flag) | cr0); - } -} // namespace teachos::cpu::x86_64 |