diff options
Diffstat (limited to 'arch')
23 files changed, 0 insertions, 777 deletions
diff --git a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp b/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp deleted file mode 100644 index 07110c8..0000000 --- a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp +++ /dev/null @@ -1,69 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_GATE_DESCRIPTOR_HPP -#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_GATE_DESCRIPTOR_HPP - -#include "arch/context_switching/interrupt_descriptor_table/idt_flags.hpp" -#include "arch/context_switching/interrupt_descriptor_table/ist_offset.hpp" -#include "arch/context_switching/interrupt_descriptor_table/segment_selector.hpp" - -#include <bitset> -#include <cstdint> - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - __extension__ typedef __int128 int128_t; - __extension__ typedef unsigned __int128 uint128_t; - - /** - * @brief Defines helper function for all states and the actual data the gate descriptor can have. - */ - struct [[gnu::packed]] gate_descriptor - { - /** - * @brief Default Constructor. - */ - gate_descriptor() = default; - - /** - * @brief Constructor. - * - * @note Created gate descriptor copies the given bytes into these components ending with a 32 bit reserved - * field that has to be used, because the 64-bit gate descriptor needs to be big enough for two 32-bit gate - * descriptor. - * - 16 bit Segment Selector - * - 3 bit Interrupt Stack Table Offset - * - 8 bit Type and Flags - * - 64 bit Offset - * - * @param flags Copies the bits set from the given data into the individual components of a gate - * descriptor. - */ - explicit gate_descriptor(uint128_t flags); - - /** - * @brief Constructor. - * - * @param selector, ist, flags, offset Copies the bits set from the given data into the individual components of - * a gate descriptor. - */ - gate_descriptor(segment_selector selector, ist_offset ist, idt_flags flags, uint64_t offset); - - /** - * @brief Allows to compare the underlying bits of two instances. - * - * @param other Other instance that we want to compare with. - * @return Whether the underlying set bits of both types are the same. - */ - auto operator==(gate_descriptor const & other) const -> bool = default; - - private: - // The order in private variables starts for the first variable being the rightmost bit. - uint16_t _offset_1 = {}; ///< Lower 16 bits of handler function address (0 - 15) - segment_selector _selector = {}; ///< Segment selector (16 - 31) - ist_offset _ist = {}; ///< Interrupt Stack Table offset (32 - 39) - idt_flags _flags = {}; ///< Gate Type and Flags (40 - 47) - uint64_t _offset_2 : 48 = {}; ///< Upper 48 bits of handler function address (48 - 95) - uint32_t : 32; ///< Reserved field used to ensure this struct is 128 bits big (96 - 127) - }; -} // namespace teachos::arch::context_switching::interrupt_descriptor_table - -#endif // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_GATE_DESCRIPTOR_HPP diff --git a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/idt_flags.hpp b/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/idt_flags.hpp deleted file mode 100644 index 5104c36..0000000 --- a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/idt_flags.hpp +++ /dev/null @@ -1,81 +0,0 @@ - -#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IDT_FLAGS_HPP -#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IDT_FLAGS_HPP - -#include <bitset> -#include <cstdint> - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - /** - * @brief Defines helper function for all states that the access byte field of a segment descriptor can - * have. - */ - struct [[gnu::packed]] idt_flags - { - /** - * @brief Possible set bits in our underlying bits and the meaning when they are set. - */ - enum bitset : uint8_t - { - INTERRUPT_GATE = 0b01110, ///< The actual type of gate segment is a interrupt gate. - TRAP_GATE = 0b01111, ///< The actual type of gate segment is a trap gate. - DESCRIPTOR_LEVEL_KERNEL = - 0U << 5U, ///< Highest privileged level used by the kernel to allow for full access of resources. - DESCRIPTOR_LEVEL_ADMIN = - 1U << 5U, ///< Restricts access to own application and thoose of lower privilege. Should only be used if more - ///< than two privilege levels are required, otherwise using Level 3 and Level 0 is recommended. - DESCRIPTOR_LEVEL_PRIVILEGED_USER = - 2U << 5U, ///< Restricts access to own application and thoose of lower privilege. Should only be used if more - ///< than two privilege levels are required, otherwise using Level 3 and Level 0 is recommended. - DESCRIPTOR_LEVEL_USER = 3U << 5U, ///< Restricts access to only application and their specific memory. - PRESENT = 1U << 7U, ///< Present bit; Allows an entry to refer to a valid segment. - ///< Must be set (1) for any valid segment. - }; - - /** - * @brief Default Constructor. - */ - idt_flags() = default; - - /** - * @brief Constructor. - * - * @param flags Allows to set flags for the access byte field using the unscoped enum contained in this class, used - * to allow for direct integer conversion. This value is saved and can later be used to check whether certain flags - * are enabled or not using contains_flags method. - */ - idt_flags(uint8_t flags); - - /** - * @brief Checks if the given std::bitset is a subset or equivalent to the underlying data. - * - * @note Meaning that all bits that are set in the given std::bitset also have to be set in the underlyng - * data. Any additional bits that are set are not relevant. - * - * @param other Flags that we want to compare against and check if the underlying data has the same bits set. - * @return Whether the given flags are a subset or equivalent with the underlying data. - */ - auto contains_flags(std::bitset<8U> other) const -> bool; - - /** - * @brief Allows to compare the underlying bits of two instances. - * - * @param other Other instance that we want to compare with. - * @return Whether the underlying set bits of both types are the same. - */ - auto operator==(idt_flags const & other) const -> bool = default; - - /** - * @brief Combines all bits that are set in the std::bitset flags with the bits already set in the underlying data. - * - * @param other Additional bits that should be set. - */ - auto operator|=(std::bitset<8U> other) -> void; - - private: - uint8_t _flags = {}; ///< Underlying bits used to read the flags from. - }; -} // namespace teachos::arch::context_switching::interrupt_descriptor_table - -#endif // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IDT_FLAGS_HPP
\ No newline at end of file diff --git a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.hpp b/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.hpp deleted file mode 100644 index b388e0e..0000000 --- a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.hpp +++ /dev/null @@ -1,24 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_INTERRUPT_DESCRIPTOR_TABLE_HPP -#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_INTERRUPT_DESCRIPTOR_TABLE_HPP - -#include "arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.hpp" - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - /** - * @brief Updates the IDTR with the created interrupt descriptor table. If it has not been created yet this - * method will create it. - */ - auto update_interrupt_descriptor_table_register() -> void; - - /** - * @brief Creates the interrupt descriptor table, with the minimum required configuration. If this method is called - * more than once, the previously created instance is returned instead. - * - * @return Reference to the created interrupt_descriptor_table. - */ - auto get_or_create_interrupt_descriptor_table() -> interrupt_descriptor_table &; - -} // namespace teachos::arch::context_switching::interrupt_descriptor_table - -#endif // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_INTERRUPT_DESCRIPTOR_TABLE_HPP diff --git a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.hpp b/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.hpp deleted file mode 100644 index 7fe933b..0000000 --- a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.hpp +++ /dev/null @@ -1,40 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_INTERRUPT_DESCRIPTOR_TABLE_POINTER_HPP -#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_INTERRUPT_DESCRIPTOR_TABLE_POINTER_HPP - -#include "arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp" -#include "arch/stl/vector.hpp" - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - using interrupt_descriptor_table = stl::vector<gate_descriptor>; - - /** - * @brief Represents a pointer to the Interrupt Descriptor Table (IDT). - * - * This structure is used to store the base address and length of the IDT. - */ - struct [[gnu::packed]] interrupt_descriptor_table_pointer - { - /** - * @brief Default constructor. - */ - interrupt_descriptor_table_pointer() = default; - - /** - * @brief Constructor. - */ - interrupt_descriptor_table_pointer(uint16_t table_length, gate_descriptor * address); - - /** - * @brief Defaulted three-way comparsion operator. - */ - auto operator<=>(interrupt_descriptor_table_pointer const & other) const -> std::strong_ordering = default; - - private: - uint16_t table_length = {}; ///< The amount of segment descriptor entries in the global descriptor table - 1. - gate_descriptor * address = {}; ///< Non-owning pointer to the IDT base address. - }; - -} // namespace teachos::arch::context_switching::interrupt_descriptor_table - -#endif // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_INTERRUPT_DESCRIPTOR_TABLE_POINTER_HPP diff --git a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/ist_offset.hpp b/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/ist_offset.hpp deleted file mode 100644 index e45bcf4..0000000 --- a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/ist_offset.hpp +++ /dev/null @@ -1,45 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IST_OFFSET_HPP -#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IST_OFFSET_HPP - -#include <bitset> -#include <cstdint> - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - /** - * @brief Defines helper function for all states that the interrupt stack table offset field of a gate descriptor can - * have. Is automatically increased to one byte in size, to include the following 5 reserved bits in the gate - * descriptor. - */ - struct [[gnu::packed]] ist_offset - { - /** - * @brief Default Constructor. - */ - ist_offset() = default; - - /** - * @brief Constructor. - * - * @param offset Offset into the interrupt stack table. A value of of 0 means we do not switch stacks, whereas 1 - 7 - * mean we switch to the n-th stack in the Interrupt Stack Table, contained in the TSS if the gate descriptor that - * contains this field is called. - */ - ist_offset(uint8_t offset); - - /** - * @brief Allows to compare the underlying set bits of two instances. - * - * @param other Other instance that we want to compare with. - * @return Whether the underlying set bits of both types are the same. - */ - auto operator==(ist_offset const & other) const -> bool = default; - - private: - uint8_t _ist : 3 = {}; ///< Offset into the interrupt stack table. A value of of 0 means we do not switch stacks, - ///< whereas 1 - 7 mean we switch to the n-th stack in the Interrupt Stack Table, contained - ///< in the TSS if the gate descriptor that contains this field is called. - }; -} // namespace teachos::arch::context_switching::interrupt_descriptor_table - -#endif // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_IST_OFFSET_HPP diff --git a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/segment_selector.hpp b/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/segment_selector.hpp deleted file mode 100644 index ea8c145..0000000 --- a/arch/x86_64/pre/include/arch/context_switching/interrupt_descriptor_table/segment_selector.hpp +++ /dev/null @@ -1,105 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_SEGMENT_SELECTOR_HPP -#define TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_SEGMENT_SELECTOR_HPP - -#include <bitset> -#include <cstdint> - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - /** - * @brief Represents a segment selector in the x86_64 architecture, which points to a valid code segment in the global - * descriptor table. - * - * A segment selector is a 16-bit identifier used to select a segment descriptor - * from the Global Descriptor Table (GDT) or the Local Descriptor Table (LDT). - * It contains an index, a table indicator (TI), and a requested privilege level (RPL). - */ - struct [[gnu::packed]] segment_selector - { - /** - * @brief Possible set bits in our underlying bits and the meaning when they are set. - */ - enum bitset : uint8_t - { - REQUEST_LEVEL_KERNEL = - 0U << 0U, ///< Highest privileged level used by the kernel to allow for full access of resources. - REQUEST_LEVEL_ADMIN = - 1U << 0U, ///< Restricts access to own application and thoose of lower privilege. Should only be used if more - ///< than two privilege levels are required, otherwise using Level 3 and Level 0 is recommended. - REQUEST_LEVEL_PRIVILEGED_USER = - 2U << 0U, ///< Restricts access to own application and thoose of lower privilege. Should only be used if more - ///< than two privilege levels are required, otherwise using Level 3 and Level 0 is recommended. - REQUEST_LEVEL_USER = 3U << 0U, ///< Restricts access to only application and their specific memory. - LOCAL_DESCRIPTOR_TABLE = 1U << 2U, ///< Wheter the index referes to an entry in the local or global descriptor - ///< table. If enabled the index points to a local descriptor table, if it is - ///< cleared it referes to a global descriptor table instead. - }; - - /** - * @brief Default constructor. - */ - segment_selector() = default; - - /** - * @brief Constructor. - * - * @param index Index into the local or global descriptor table. Processor multiplies the index value by 8 (number - * of bytes in 32-bit segment descriptor) and adds the result to the base GDT or LDT address. - * @param flags Allows to set flags for the flags field using the unscoped enum contained in this class, used to - * allow for direct integer conversion. - */ - constexpr segment_selector(uint16_t index, uint8_t flags) - : _flags(flags) - , _index(index) - { - // Nothing to do. - } - - /** - * @brief Checks if the given std::bitset is a subset or equivalent to the underlying data. - * - * @note Meaning that all bits that are set in the given std::bitset also have to be set in the underlyng - * data. Any additional bits that are set are not relevant. - * - * @param other Flags that we want to compare against and check if the underlying data has the same bits set. - * @return Whether the given flags are a subset or equivalent with the underlying data. - */ - auto contains_flags(std::bitset<3U> other) const -> bool; - - /** - * @brief Gets the index into the global descriptor table or the local descriptor table this segment selector is - * pointing too. - * - * @return Underlying value of the index field, bit 3 - 16. - */ - [[gnu::section(".user_text")]] - auto get_index() const -> uint16_t; - - /** - * @brief Defaulted three-way comparsion operator. - */ - auto operator<=>(segment_selector const & other) const -> std::strong_ordering = default; - - /** - * @brief Combines all bits that are set in the std::bitset flags with the bits already set in the underlying data. - * - * @param other Additional bits that should be set. - */ - auto operator|=(std::bitset<3U> other) -> void; - - /** - * @brief Cast the underlying data into a combined 16-bit form, that contains all data. - * - * @return Underlying value combined into it's full size. - */ - operator uint16_t() const; - - private: - uint8_t _flags : 3 = {}; ///< Underlying bits used to read the flags from. - uint16_t _index - : 13 = {}; ///< Index into the local or global descriptor table. Processor multiplies the index value by 16 - ///< (number of bytes in segment descriptor) and adds the result to the base address. - }; -} // namespace teachos::arch::context_switching::interrupt_descriptor_table - -#endif // TEACHOS_ARCH_X86_64_CONTEXT_SWITCHING_INTERRUPT_DESCRIPTOR_TABLE_SEGMENT_SELECTOR_HPP diff --git a/arch/x86_64/pre/include/arch/interrupt_handling/generic_interrupt_handler.hpp b/arch/x86_64/pre/include/arch/interrupt_handling/generic_interrupt_handler.hpp deleted file mode 100644 index 15b35c1..0000000 --- a/arch/x86_64/pre/include/arch/interrupt_handling/generic_interrupt_handler.hpp +++ /dev/null @@ -1,34 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_INTERRUPT_HANDLING_GENERIC_INTERRUPT_HANDLER_HPP -#define TEACHOS_ARCH_X86_64_INTERRUPT_HANDLING_GENERIC_INTERRUPT_HANDLER_HPP - -#include <cstdint> - -namespace teachos::arch::interrupt_handling -{ - /** - * @brief Represents the CPU state during an interrupt. - * - * Some interrupts push an error code, while others do not. The full list - * of which vector number contains the error code can be found here: https://wiki.osdev.org/Exceptions - */ - struct [[gnu::packed]] interrupt_frame - { - // uint64_t error_code; ///< Error code only pushed by some exceptions, therefore it is commented out. - uint64_t ip; ///< Instruction pointer at the time of the interrupt. - uint64_t cs; ///< Code segment selector indicating privilege level. - uint64_t flags; ///< CPU flags (RFLAGS) storing processor state. - uint64_t sp; ///< Stack pointer at the time of the interrupt. - uint64_t ss; ///< Stack segment selector, usually unused in 64-bit mode. - }; - - /** - * @brief Generic interrupt handler function. - * - * @param frame Pointer to the interrupt frame containing CPU state. - */ - [[gnu::interrupt]] - auto generic_interrupt_handler(interrupt_frame * frame) -> void; - -} // namespace teachos::arch::interrupt_handling - -#endif // TEACHOS_ARCH_X86_64_INTERRUPT_HANDLING_GENERIC_INTERRUPT_HANDLER_HPP diff --git a/arch/x86_64/pre/include/arch/kernel/cpu/call.hpp b/arch/x86_64/pre/include/arch/kernel/cpu/call.hpp deleted file mode 100644 index 3c43304..0000000 --- a/arch/x86_64/pre/include/arch/kernel/cpu/call.hpp +++ /dev/null @@ -1,30 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_KERNEL_CPU_JMP_HPP -#define TEACHOS_ARCH_X86_64_KERNEL_CPU_JMP_HPP - -#include "arch/context_switching/interrupt_descriptor_table/segment_selector.hpp" - -#include <cstdint> - -namespace teachos::arch::kernel::cpu -{ - /** - * @brief Far Pointer. Address to function located in another code segment. - */ - struct far_pointer - { - void (*function)(); ///< Address of the function we want to call. (0-63) - context_switching::interrupt_descriptor_table::segment_selector - selector; ///< Segment selector pointing to the GDT entry we want to load into register CS. (64-79) - }; - - /** - * @brief Far call - A call to an instruction located in a different segment than the current code segment but at the - * same privilege level. - * - * @param pointer 64-bit operand size far pointer that we want to call. - */ - auto call(far_pointer pointer) -> void; - -} // namespace teachos::arch::kernel::cpu - -#endif // TEACHOS_ARCH_X86_64_KERNEL_CPU_JMP_HPP diff --git a/arch/x86_64/pre/include/arch/kernel/cpu/idtr.hpp b/arch/x86_64/pre/include/arch/kernel/cpu/idtr.hpp deleted file mode 100644 index cb800d0..0000000 --- a/arch/x86_64/pre/include/arch/kernel/cpu/idtr.hpp +++ /dev/null @@ -1,27 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_KERNEL_CPU_IDTR_HPP -#define TEACHOS_ARCH_X86_64_KERNEL_CPU_IDTR_HPP - -#include "arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.hpp" - -#include <bitset> -#include <cstdint> - -namespace teachos::arch::kernel::cpu -{ - /** - * @brief Returns the value in the IDTR register. - * - * @return Value of IDTR register. - */ - auto store_interrupt_descriptor_table() - -> context_switching::interrupt_descriptor_table::interrupt_descriptor_table_pointer; - - /** - * @brief Loads the interrupt_descriptor_table_pointer into the interrupt descriptor table register (IDTR). - */ - auto load_interrupt_descriptor_table( - context_switching::interrupt_descriptor_table::interrupt_descriptor_table_pointer const & idt_pointer) -> void; - -} // namespace teachos::arch::kernel::cpu - -#endif // TEACHOS_ARCH_X86_64_KERNEL_CPU_IDTR_HPP diff --git a/arch/x86_64/pre/include/arch/kernel/cpu/if.hpp b/arch/x86_64/pre/include/arch/kernel/cpu/if.hpp deleted file mode 100644 index 48707dc..0000000 --- a/arch/x86_64/pre/include/arch/kernel/cpu/if.hpp +++ /dev/null @@ -1,21 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_KERNEL_CPU_IF_HPP -#define TEACHOS_ARCH_X86_64_KERNEL_CPU_IF_HPP - -namespace teachos::arch::kernel::cpu -{ - /** - * @brief Sets the interrupt flag (IF) in the EFLAGS register. - * This allows the processor to respond to maskable hardware interrupts. - */ - auto set_interrupt_flag() -> void; - - /** - * @brief Clears the interrupt flag (IF) in the EFLAGS register. - * This will stop the processor to respond to maskable hardware interrupts and needs to be done before changing the - * Interrupt Descriptor Table with lidt. - */ - auto clear_interrupt_flag() -> void; - -} // namespace teachos::arch::kernel::cpu - -#endif // TEACHOS_ARCH_X86_64_KERNEL_CPU_IF_HPP diff --git a/arch/x86_64/pre/include/arch/kernel/cpu/msr.hpp b/arch/x86_64/pre/include/arch/kernel/cpu/msr.hpp deleted file mode 100644 index 99d6378..0000000 --- a/arch/x86_64/pre/include/arch/kernel/cpu/msr.hpp +++ /dev/null @@ -1,64 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_KERNEL_CPU_NXE_HPP -#define TEACHOS_ARCH_X86_64_KERNEL_CPU_NXE_HPP - -#include <bitset> -#include <cstdint> - -namespace teachos::arch::kernel::cpu -{ - /** - * @brief Important flags that can be writen into the Extended Feature Enable Register (EFER). - * - * @note EFER is a model-specific register allowing to configure CPU extensions. Only the most important extensions - * are listed below, the rest are excluded for brevity. See https://en.wikipedia.org/wiki/Control_register#EFER for - * more information. - */ - enum class efer_flags : uint64_t - { - SCE = 1UL << 0UL, ///< System Call Extensions. - LME = 1UL << 8UL, ///< Long Mode Enabled. - LMA = 1UL << 10UL, ///< Long Mode Active. - NXE = 1UL << 11UL, ///< No-Execute Enable. - SVME = 1UL << 12UL, ///< Secure Virtual Machine Enable. - LMSLE = 1UL << 13UL, ///< Long Mode Segment Limit Enable. - FFXSR = 1UL << 14UL, ///< Fast FXSAVE/FXSTOR. - TCE = 1UL << 15UL, ///< Translation Cache Extension. - }; - - /** - * @brief Reads a 64-bit from the Model-Specific Register (MSR). - * - * @note This function reads the value of an MSR specified by the given address. It combines the lower and upper - * 32-bits of the MSR value read using the 'rdmsr' instruction and returns it as a 64-bit unsigned integer. - * - * @param msr The address of the MSR to read. - * @return The 64-bit value read from the MSR. - */ - auto read_msr(uint32_t msr) -> uint64_t; - - /** - * @brief Writes a 64-bit value to a Model-Specific Register (MSR). - * - * @note This function writes a 64-bit value to the MSR specified by the given address. - * It splits the 64-bit value into two 32-bit parts and writes them using the - * `wrmsr` instruction. - * - * @param msr The address of the MSR to write to. - * @param new_value The 64-bit value to write to the MSR. - */ - auto write_msr(uint32_t msr, uint64_t new_value) -> void; - - /** - * @brief Sets a specific bit in the Extended Feature Enable Register (EFER), which is a Model-Specific Register - * (MSR). - * - * @note This function reads the current value of the EFER register, ORs the specified - * bit with the current value, and writes the updated value back to the EFER register. - * - * @param flag The flag to set in the EFER register. - */ - auto set_efer_bit(efer_flags flag) -> void; - -} // namespace teachos::arch::kernel::cpu - -#endif // TEACHOS_ARCH_X86_64_KERNEL_CPU_NXE_HPP
\ No newline at end of file diff --git a/arch/x86_64/pre/include/arch/kernel/cpu/tr.hpp b/arch/x86_64/pre/include/arch/kernel/cpu/tr.hpp deleted file mode 100644 index 7c856f1..0000000 --- a/arch/x86_64/pre/include/arch/kernel/cpu/tr.hpp +++ /dev/null @@ -1,24 +0,0 @@ -#ifndef TEACHOS_ARCH_X86_64_KERNEL_CPU_TR_HPP -#define TEACHOS_ARCH_X86_64_KERNEL_CPU_TR_HPP - -#include <bitset> -#include <cstdint> - -namespace teachos::arch::kernel::cpu -{ - - /** - * @brief Returns the value in the LTR register. - * - * @return Value of LTR register. - */ - auto store_task_register() -> uint16_t; - - /** - * @brief Loads the gdt offset to the tss segment descriptor into the task register (TR). - */ - auto load_task_register(uint16_t gdt_offset) -> void; - -} // namespace teachos::arch::kernel::cpu - -#endif // TEACHOS_ARCH_X86_64_KERNEL_CPU_TR_HPP diff --git a/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/gate_descriptor.cpp b/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/gate_descriptor.cpp deleted file mode 100644 index 28f289c..0000000 --- a/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/gate_descriptor.cpp +++ /dev/null @@ -1,24 +0,0 @@ -#include "arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp" - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - gate_descriptor::gate_descriptor(uint128_t flags) - : _offset_1(flags) - , _selector(flags >> 19U, flags >> 16U) - , _ist(flags >> 32U) - , _flags(flags >> 40U) - , _offset_2(flags >> 48U) - { - // Nothing to do. - } - - gate_descriptor::gate_descriptor(segment_selector selector, ist_offset ist, idt_flags flags, uint64_t offset) - : _offset_1(offset) - , _selector(selector) - , _ist(ist) - , _flags(flags) - , _offset_2(offset >> 16U) - { - // Nothing to do. - } -} // namespace teachos::arch::context_switching::interrupt_descriptor_table diff --git a/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/idt_flags.cpp b/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/idt_flags.cpp deleted file mode 100644 index f3b9d5e..0000000 --- a/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/idt_flags.cpp +++ /dev/null @@ -1,20 +0,0 @@ -#include "arch/context_switching/interrupt_descriptor_table/idt_flags.hpp" - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - idt_flags::idt_flags(uint8_t flags) - : _flags(flags) - { - // Nothing to do. - } - - auto idt_flags::contains_flags(std::bitset<8U> other) const -> bool - { - return (std::bitset<8U>{_flags} & other) == other; - } - - auto idt_flags::operator|=(std::bitset<8U> other) -> void - { - _flags |= other.to_ulong(); - } -} // namespace teachos::arch::context_switching::interrupt_descriptor_table diff --git a/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp b/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp deleted file mode 100644 index 8640385..0000000 --- a/arch/x86_64/pre/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp +++ /dev/null @@ -1,53 +0,0 @@ -#include "arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.hpp" - -#include "arch/exception_handling/assert.hpp" -#include "arch/interrupt_handling/generic_interrupt_handler.hpp" -#include "arch/kernel/cpu/idtr.hpp" - -namespace teachos::arch::context_switching::interrupt_descriptor_table -{ - namespace - { - /// @brief Amount of currently reserved interrupt indicies. - /// See https://wiki.osdev.org/Interrupt_Descriptor_Table#IDT_items for more information. - constexpr uint16_t RESERVED_INTERRUPT_COUNT = 256U; - - auto create_interrupt_descriptor_table() -> interrupt_descriptor_table - { - interrupt_descriptor_table interrupt_descriptor_table{RESERVED_INTERRUPT_COUNT}; - - uint64_t offset = reinterpret_cast<uint64_t>(interrupt_handling::generic_interrupt_handler); - segment_selector selector{1U, segment_selector::REQUEST_LEVEL_KERNEL}; - ist_offset ist{0U}; - idt_flags flags{idt_flags::DESCRIPTOR_LEVEL_KERNEL | idt_flags::INTERRUPT_GATE | idt_flags::PRESENT}; - - for (std::size_t i = 0; i < interrupt_descriptor_table.size(); i++) - { - interrupt_descriptor_table.at(i) = {selector, ist, flags, offset}; - } -</ |