39,50 → 39,44 |
#include "types.h" |
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#define FRAME_WIDTH 12 /* 4KB frames */ |
#define FRAME_SIZE (1 << FRAME_WIDTH) |
#define FRAME_WIDTH 12 /* 4KB frames */ |
#define FRAME_SIZE (1 << FRAME_WIDTH) |
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#define PAGE_WIDTH FRAME_WIDTH |
#define PAGE_SIZE FRAME_SIZE |
#define PAGE_WIDTH FRAME_WIDTH |
#define PAGE_SIZE FRAME_SIZE |
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#ifndef __ASM__ |
# define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
# define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
# define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
# define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
#else |
# define KA2PA(x) ((x) - 0x80000000) |
# define PA2KA(x) ((x) + 0x80000000) |
# define KA2PA(x) ((x) - 0x80000000) |
# define PA2KA(x) ((x) + 0x80000000) |
#endif |
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#define SET_PTL0_ADDRESS_ARCH(ptl0) ( set_ptl0_addr((pte_level0_section *)(ptl0)) ) |
#define PTL0_ENTRIES_ARCH (2<<12) /* 4096 */ |
#define SET_PTL0_ADDRESS_ARCH(ptl0) ( set_ptl0_addr((pte_level0_section *)(ptl0)) ) |
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/** Frames per 1MB section */ |
#define FRAMES_PER_SECTION ( ( 1 << 20 ) / FRAME_SIZE ) |
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/// User no acess, kernel read/write |
#define pte_ap_user_no_kernel_rw 1 |
/** Converts adress to frame */ |
#define ADDR2PFN( addr ) ( ((uintptr_t)(addr))>>FRAME_WIDTH ) |
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/// Frames per 1MB section |
#define FRAMES_PER_SECTION ( ( 1 << 20 ) / FRAME_SIZE ) |
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/// Converts Address to frame |
#define ADDR2PFN( addr ) ( ((uintptr_t)(addr))>>FRAME_WIDTH ) |
/** Value of descriptor_type in page table entry that signals |
* that this entry describe section |
*/ |
#define pte_descriptor_section 2 |
#define PTE_DESCRIPTOR_SECTION 2 |
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/** Page Table Entry. */ |
typedef struct { |
/**PageTables are so different that we have different types |
* for level 0 and level1 page table entries |
*/ |
unsigned dummy : 32; |
} pte_t; |
/** Rights: user-no acess, kernel-read/write */ |
#define PTE_AP_USER_NO_KERNEL_RW 1 |
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/** Page table level 0 entry - section format */ |
typedef struct { |
unsigned descriptor_type : 2; // should be 2 |
unsigned bufferable : 1; |
unsigned cacheable : 1; |
unsigned machine_depend : 1; // Alf: ???? v Architecture previev neni vyznam definovan |
unsigned machine_depend : 1; |
unsigned domain : 4; |
unsigned should_be_zero_1 : 1; |
unsigned access_permission : 2; |
102,19 → 96,10 |
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} |
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/// Page table that holds 1:1 mapping for kernel starting |
extern pte_level0_section page_table[4096]; |
/** Page table that holds 1:1 mapping for kernel starting */ |
extern pte_level0_section page_table[PTL0_ENTRIES_ARCH]; |
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/** Set page table entry to point no frame, be read/write by kernel, |
* no access by user, become to domain 0, no cache or buffer |
* \param pte page table entry to set |
* \param frame frame number of first frame 1MB section |
* Note: If frame not aligned it's used first lower 1MB aligned frame |
*/ |
void init_pte_level0_section_entry( pte_level0_section* pte, unsigned frame); |
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/// Sets memory mapping for kernel |
/** Sets memory mapping for kernel */ |
void mm_kernel_mapping(void); |
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#endif |