HelenOS sources
This source file includes following definitions.
- get_pt_flags
- set_pt_flags
- set_pt_present
#ifndef KERN_ia32_PAGE_H_
#define KERN_ia32_PAGE_H_
#include <arch/mm/frame.h>
#include <stdbool.h>
#define PAGE_WIDTH FRAME_WIDTH
#define PAGE_SIZE FRAME_SIZE
#define PTE_P (1 << 0)
#define PTE_RW (1 << 1)
#define PDE_P (1 << 0)
#define PDE_RW (1 << 1)
#define PDE_4M (1 << 7)
#ifndef __ASSEMBLER__
#define KA2PA(x) (((uintptr_t) (x)) - UINT32_C(0x80000000))
#define PA2KA(x) (((uintptr_t) (x)) + UINT32_C(0x80000000))
#else
#define KA2PA(x) ((x) - 0x80000000)
#define PA2KA(x) ((x) + 0x80000000)
#endif
#define PTL0_ENTRIES_ARCH 1024
#define PTL1_ENTRIES_ARCH 0
#define PTL2_ENTRIES_ARCH 0
#define PTL3_ENTRIES_ARCH 1024
#define PTL0_FRAMES_ARCH 1
#define PTL1_FRAMES_ARCH 1
#define PTL2_FRAMES_ARCH 1
#define PTL3_FRAMES_ARCH 1
#define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 22) & 0x3ffU)
#define PTL1_INDEX_ARCH(vaddr) 0
#define PTL2_INDEX_ARCH(vaddr) 0
#define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x3ffU)
#define GET_PTL1_ADDRESS_ARCH(ptl0, i) \
((pte_t *) ((((pte_t *) (ptl0))[(i)].frame_address) << 12))
#define GET_PTL2_ADDRESS_ARCH(ptl1, i) \
(ptl1)
#define GET_PTL3_ADDRESS_ARCH(ptl2, i) \
(ptl2)
#define GET_FRAME_ADDRESS_ARCH(ptl3, i) \
((uintptr_t) ((((pte_t *) (ptl3))[(i)].frame_address) << 12))
#define SET_PTL0_ADDRESS_ARCH(ptl0) \
(write_cr3((uintptr_t) (ptl0)))
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) \
(((pte_t *) (ptl0))[(i)].frame_address = (a) >> 12)
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) \
(((pte_t *) (ptl3))[(i)].frame_address = (a) >> 12)
#define GET_PTL1_FLAGS_ARCH(ptl0, i) \
get_pt_flags((pte_t *) (ptl0), (size_t) (i))
#define GET_PTL2_FLAGS_ARCH(ptl1, i) \
PAGE_PRESENT
#define GET_PTL3_FLAGS_ARCH(ptl2, i) \
PAGE_PRESENT
#define GET_FRAME_FLAGS_ARCH(ptl3, i) \
get_pt_flags((pte_t *) (ptl3), (size_t) (i))
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) \
set_pt_flags((pte_t *) (ptl0), (size_t) (i), (x))
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) \
set_pt_flags((pte_t *) (ptl3), (size_t) (i), (x))
#define SET_PTL1_PRESENT_ARCH(ptl0, i) \
set_pt_present((pte_t *) (ptl0), (size_t) (i))
#define SET_PTL2_PRESENT_ARCH(ptl1, i)
#define SET_PTL3_PRESENT_ARCH(ptl2, i)
#define SET_FRAME_PRESENT_ARCH(ptl3, i) \
set_pt_present((pte_t *) (ptl3), (size_t) (i))
#define PTE_VALID_ARCH(p) \
((p)->soft_valid != 0)
#define PTE_PRESENT_ARCH(p) \
((p)->present != 0)
#define PTE_GET_FRAME_ARCH(p) \
((p)->frame_address << FRAME_WIDTH)
#define PTE_WRITABLE_ARCH(p) \
((p)->writeable != 0)
#define PTE_EXECUTABLE_ARCH(p) 1
#ifndef __ASSEMBLER__
#include <mm/mm.h>
#include <arch/interrupt.h>
#include <stddef.h>
#include <trace.h>
#define PFERR_CODE_P (1 << 0)
#define PFERR_CODE_RW (1 << 1)
#define PFERR_CODE_US (1 << 2)
#define PFERR_CODE_RSVD (1 << 3)
typedef struct {
unsigned present : 1;
unsigned writeable : 1;
unsigned uaccessible : 1;
unsigned page_write_through : 1;
unsigned page_cache_disable : 1;
unsigned accessed : 1;
unsigned dirty : 1;
unsigned pat : 1;
unsigned global : 1;
unsigned soft_valid : 1;
unsigned avl : 2;
unsigned frame_address : 20;
} __attribute__((packed)) pte_t;
_NO_TRACE static inline unsigned int get_pt_flags(pte_t *pt, size_t i)
{
pte_t *p = &pt[i];
return ((!p->page_cache_disable) << PAGE_CACHEABLE_SHIFT |
(!p->present) << PAGE_PRESENT_SHIFT |
p->uaccessible << PAGE_USER_SHIFT |
1 << PAGE_READ_SHIFT |
p->writeable << PAGE_WRITE_SHIFT |
1 << PAGE_EXEC_SHIFT |
p->global << PAGE_GLOBAL_SHIFT |
p->page_write_through << PAGE_WRITE_COMBINE_SHIFT);
}
_NO_TRACE static inline void set_pt_flags(pte_t *pt, size_t i, int flags)
{
pte_t *p = &pt[i];
p->present = !(flags & PAGE_NOT_PRESENT);
p->uaccessible = (flags & PAGE_USER) != 0;
p->writeable = (flags & PAGE_WRITE) != 0;
p->global = (flags & PAGE_GLOBAL) != 0;
if (flags & PAGE_WRITE_COMBINE) {
p->page_cache_disable = 1;
p->page_write_through = 1;
} else {
p->page_cache_disable = !(flags & PAGE_CACHEABLE);
p->page_write_through = 0;
}
p->soft_valid = true;
}
_NO_TRACE static inline void set_pt_present(pte_t *pt, size_t i)
{
pte_t *p = &pt[i];
p->present = 1;
}
extern void page_arch_init(void);
extern void page_fault(unsigned int, istate_t *);
#endif
#endif
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