diff options
Diffstat (limited to 'mmu.h')
| -rw-r--r-- | mmu.h | 60 |
1 files changed, 30 insertions, 30 deletions
@@ -25,19 +25,19 @@ #define FL_ID 0x00200000 // ID flag // 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 Errror -#define CR0_WP 0x00010000 // Write Protect -#define CR0_AM 0x00040000 // Alignment Mask -#define CR0_NW 0x20000000 // Not Writethrough -#define CR0_CD 0x40000000 // Cache Disable -#define CR0_PG 0x80000000 // Paging - -#define CR4_PSE 0x00000010 // Page size extension +#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 Errror +#define CR0_WP 0x00010000 // Write Protect +#define CR0_AM 0x00040000 // Alignment Mask +#define CR0_NW 0x20000000 // Not Writethrough +#define CR0_CD 0x40000000 // Cache Disable +#define CR0_PG 0x80000000 // Paging + +#define CR4_PSE 0x00000010 // Page size extension #define SEG_KCODE 1 // kernel code #define SEG_KDATA 2 // kernel data+stack @@ -109,39 +109,39 @@ struct segdesc { // \--- PDX(va) --/ \--- PTX(va) --/ // page directory index -#define PDX(va) (((uint)(va) >> PDXSHIFT) & 0x3FF) +#define PDX(va) (((uint)(va) >> PDXSHIFT) & 0x3FF) // page table index -#define PTX(va) (((uint)(va) >> PTXSHIFT) & 0x3FF) +#define PTX(va) (((uint)(va) >> PTXSHIFT) & 0x3FF) // construct virtual address from indexes and offset -#define PGADDR(d, t, o) ((uint)((d) << PDXSHIFT | (t) << PTXSHIFT | (o))) +#define PGADDR(d, t, o) ((uint)((d) << PDXSHIFT | (t) << PTXSHIFT | (o))) // Page directory and page table constants. -#define NPDENTRIES 1024 // page directory entries per page directory -#define NPTENTRIES 1024 // page table entries per page table +#define NPDENTRIES 1024 // page directory entries per page directory +#define NPTENTRIES 1024 // page table entries per page table #define PGSIZE 4096 // bytes mapped by a page #define PGSHIFT 12 // log2(PGSIZE) -#define PTXSHIFT 12 // offset of PTX in a linear address -#define PDXSHIFT 22 // offset of PDX in a linear address +#define PTXSHIFT 12 // offset of PTX in a linear address +#define PDXSHIFT 22 // offset of PDX in a linear address #define PGROUNDUP(sz) (((sz)+PGSIZE-1) & ~(PGSIZE-1)) #define PGROUNDDOWN(a) (((a)) & ~(PGSIZE-1)) // Page table/directory entry flags. -#define PTE_P 0x001 // Present -#define PTE_W 0x002 // Writeable -#define PTE_U 0x004 // User -#define PTE_PWT 0x008 // Write-Through -#define PTE_PCD 0x010 // Cache-Disable -#define PTE_A 0x020 // Accessed -#define PTE_D 0x040 // Dirty -#define PTE_PS 0x080 // Page Size -#define PTE_MBZ 0x180 // Bits must be zero +#define PTE_P 0x001 // Present +#define PTE_W 0x002 // Writeable +#define PTE_U 0x004 // User +#define PTE_PWT 0x008 // Write-Through +#define PTE_PCD 0x010 // Cache-Disable +#define PTE_A 0x020 // Accessed +#define PTE_D 0x040 // Dirty +#define PTE_PS 0x080 // Page Size +#define PTE_MBZ 0x180 // Bits must be zero // Address in page table or page directory entry -#define PTE_ADDR(pte) ((uint)(pte) & ~0xFFF) +#define PTE_ADDR(pte) ((uint)(pte) & ~0xFFF) #ifndef __ASSEMBLER__ typedef uint pte_t; |