diff options
Diffstat (limited to 'arch/x86_64/src')
| -rw-r--r-- | arch/x86_64/src/boot/boot.s | 4 | ||||
| -rw-r--r-- | arch/x86_64/src/context_switching/descriptor_table/access_byte.cpp | 14 |
2 files changed, 16 insertions, 2 deletions
diff --git a/arch/x86_64/src/boot/boot.s b/arch/x86_64/src/boot/boot.s index 2197dce..dbea42a 100644 --- a/arch/x86_64/src/boot/boot.s +++ b/arch/x86_64/src/boot/boot.s @@ -197,10 +197,10 @@ _start: call enable_paging call enable_sse - cli // Clears the interrupt flag during the GDT setup + cli /* Clears the interrupt flag during the GDT setup */ lgdt (global_descriptor_table_pointer) jmp $global_descriptor_table_code,$_transition_to_long_mode - // The interrupt flag is set in cpp after setting up the GDT + /* The interrupt flag is set in cpp after setting up the GDT */ call halt diff --git a/arch/x86_64/src/context_switching/descriptor_table/access_byte.cpp b/arch/x86_64/src/context_switching/descriptor_table/access_byte.cpp new file mode 100644 index 0000000..15a0947 --- /dev/null +++ b/arch/x86_64/src/context_switching/descriptor_table/access_byte.cpp @@ -0,0 +1,14 @@ +#include "arch/context_switching/descriptor_table/access_byte.hpp" + +#include <bitset> + +namespace teachos::arch::context_switching::descriptor_table +{ + auto access_byte::contains_flags(std::bitset<8U> other) const -> bool { return (flags & other) == other; } + + auto access_byte::get_privilege_level() const -> privilege_level + { + constexpr uint8_t PRIVILEGE_MASK = 0b0110'0000; + return static_cast<privilege_level>(flags.to_ulong() & PRIVILEGE_MASK); + } +} // namespace teachos::arch::context_switching::descriptor_table |