| /* Contains macros and constants for the kernel VM mapping, page tables, |
| * segmentation, control registers, etc. */ |
| |
| #pragma once |
| |
| #define ROS_INC_ARCH_MMU_H |
| |
| #include <ros/arch/mmu64.h> |
| |
| /* **************************************** */ |
| /* Control Registers */ |
| |
| // Control Register flags |
| #define CR0_PE 0x00000001 // Protection Enable |
| #define CR0_MP 0x00000002 // Monitor coProcessor |
| #define CR0_EM 0x00000004 // Emulation |
| #define CR0_TS 0x00000008 // Task Switched |
| #define CR0_ET 0x00000010 // Extension Type |
| #define CR0_NE 0x00000020 // Numeric Error |
| #define CR0_WP 0x00010000 // Write Protect |
| #define CR0_AM 0x00040000 // Alignment Mask |
| #define CR0_NW 0x20000000 // Not Writethrough - more tricky than it sounds |
| #define CR0_CD 0x40000000 // Cache Disable |
| #define CR0_PG 0x80000000 // Paging |
| |
| // These two relate to the cacheability (L1, etc) of the page directory |
| #define CR3_PWT 0x00000008 // Page directory caching write through |
| #define CR3_PCD 0x00000010 // Page directory caching disabled |
| |
| #define CR4_VME 0x00000001 // V86 Mode Extensions |
| #define CR4_PVI 0x00000002 // Protected-Mode Virtual Interrupts |
| #define CR4_TSD 0x00000004 // Time Stamp Disable |
| #define CR4_DE 0x00000008 // Debugging Extensions |
| #define CR4_PSE 0x00000010 // Page Size Extensions |
| #define CR4_PAE 0x00000020 // Physical Address Extensions |
| #define CR4_MCE 0x00000040 // Machine Check Enable |
| #define CR4_PGE 0x00000080 // Global Pages Enabled |
| #define CR4_PCE 0x00000100 // Performance counter enable |
| #define CR4_OSFXSR 0x00000200 // OS support for FXSAVE/FXRSTOR |
| #define CR4_OSXMME 0x00000400 // OS support for unmasked SIMD FP exceptions |
| #define CR4_VMXE 0x00002000 // VMX enable |
| #define CR4_SMXE 0x00004000 // SMX enable |
| #define CR4_FSGSBASE 0x00010000 // RD/WR FS/GS Base enabled |
| #define CR4_OSXSAVE 0x00040000 // XSAVE and processor extended states-enabled |
| |
| // Eflags register |
| #define FL_CF 0x00000001 // Carry Flag |
| #define FL_PF 0x00000004 // Parity Flag |
| #define FL_AF 0x00000010 // Auxiliary carry Flag |
| #define FL_ZF 0x00000040 // Zero Flag |
| #define FL_SF 0x00000080 // Sign Flag |
| #define FL_TF 0x00000100 // Trap Flag |
| #define FL_IF 0x00000200 // Interrupt Flag |
| #define FL_DF 0x00000400 // Direction Flag |
| #define FL_OF 0x00000800 // Overflow Flag |
| #define FL_STATUS (FL_CF | FL_PF | FL_AF | FL_ZF | FL_SF | FL_OF) |
| #define FL_IOPL_MASK 0x00003000 // I/O Privilege Level bitmask |
| #define FL_IOPL_0 0x00000000 // IOPL == 0 |
| #define FL_IOPL_1 0x00001000 // IOPL == 1 |
| #define FL_IOPL_2 0x00002000 // IOPL == 2 |
| #define FL_IOPL_3 0x00003000 // IOPL == 3 |
| #define FL_NT 0x00004000 // Nested Task |
| #define FL_RF 0x00010000 // Resume Flag |
| #define FL_VM 0x00020000 // Virtual 8086 mode |
| #define FL_AC 0x00040000 // Alignment Check |
| #define FL_VIF 0x00080000 // Virtual Interrupt Flag |
| #define FL_VIP 0x00100000 // Virtual Interrupt Pending |
| #define FL_ID 0x00200000 // ID flag |
| #define FL_RSVD_1 0x00000002 // These 1s must be 1, rflags |= this |
| #define FL_RSVD_0 0x003f7fd7 // These 0s must be 0, rflags &= this |
| |
| // Page fault error codes |
| #define FEC_PR 0x1 // Page fault caused by protection violation |
| #define FEC_WR 0x2 // Page fault caused by a write |
| #define FEC_U 0x4 // Page fault occured while in user mode |
