amd64
[Memory management]


Files

file  as.h
file  frame.h
file  page.h
file  ptl.h
file  tlb.h
file  memory_init.c
file  page.c

Defines

#define KERNEL_ADDRESS_SPACE_SHADOWED_ARCH   0
#define KERNEL_ADDRESS_SPACE_START_ARCH   (unsigned long) 0xffff800000000000
#define KERNEL_ADDRESS_SPACE_END_ARCH   (unsigned long) 0xffffffffffffffff
#define USER_ADDRESS_SPACE_START_ARCH   (unsigned long) 0x0000000000000000
#define USER_ADDRESS_SPACE_END_ARCH   (unsigned long) 0x00007fffffffffff
#define USTACK_ADDRESS_ARCH   (USER_ADDRESS_SPACE_END_ARCH-(PAGE_SIZE-1))
#define as_install_arch(as)
#define FRAME_WIDTH   12
#define FRAME_SIZE   (1<<FRAME_WIDTH)
#define PAGE_WIDTH   FRAME_WIDTH
#define PAGE_SIZE   FRAME_SIZE
#define PTL_NO_EXEC   (1<<63)
#define PTL_ACCESSED   (1<<5)
#define PTL_CACHE_DISABLE   (1<<4)
#define PTL_CACHE_THROUGH   (1<<3)
#define PTL_USER   (1<<2)
#define PTL_WRITABLE   (1<<1)
#define PTL_PRESENT   1
#define PTL_2MB_PAGE   (1<<7)
#define tlb_arch_init()
#define tlb_print()
#define PTL1_PRESENT(ptl0, page)   (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
#define PTL2_PRESENT(ptl1, page)   (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
#define PTL3_PRESENT(ptl2, page)   (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
#define PTL1_ADDR(ptl0, page)   ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page))))
#define PTL2_ADDR(ptl1, page)   ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page))))
#define PTL3_ADDR(ptl2, page)   ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page))))
#define SETUP_PTL1(ptl0, page, tgt)
#define SETUP_PTL2(ptl1, page, tgt)
#define SETUP_PTL3(ptl2, page, tgt)
#define SETUP_FRAME(ptl3, page, tgt)

Functions

void as_arch_init (void)
void frame_arch_init (void)
size_t get_memory_size (void)
void memory_print_map (void)
pte_t helper_ptl1[512] __attribute__ ((aligned(PAGE_SIZE)))
void page_arch_init (void)
void ident_page_fault (int n, istate_t *istate)
void page_fault (int n, istate_t *istate)
__address hw_map (__address physaddr, size_t size)

Variables

__address last_frame
__u8 e820counter = 0xff
e820memmap_ e820table [MEMMAP_E820_MAX_RECORDS]
__u32 e801memorysize
pte_t ptl_0

Define Documentation

#define as_install_arch (  as   ) 
 

Definition at line 47 of file as.h.

Referenced by as_switch().

#define FRAME_SIZE   (1<<FRAME_WIDTH)
 

Definition at line 43 of file frame.h.

Referenced by anon_page_fault(), elf_frame_free(), elf_page_fault(), hw_map(), page_arch_init(), phys_page_fault(), and sys_physmem_map().

#define FRAME_WIDTH   12
 

Definition at line 42 of file frame.h.

Referenced by ADDR2PFN(), PFN2ADDR(), and SIZE2FRAMES().

#define KERNEL_ADDRESS_SPACE_END_ARCH   (unsigned long) 0xffffffffffffffff
 

Definition at line 41 of file as.h.

Referenced by hw_map().

#define KERNEL_ADDRESS_SPACE_SHADOWED_ARCH   0
 

Definition at line 38 of file as.h.

#define KERNEL_ADDRESS_SPACE_START_ARCH   (unsigned long) 0xffff800000000000
 

Definition at line 40 of file as.h.

#define PAGE_SIZE   FRAME_SIZE
 

Definition at line 53 of file page.h.

Referenced by anon_page_fault(), anon_share(), as_area_create(), as_area_destroy(), as_area_resize(), as_area_share(), as_get_size(), badness(), check_area_conflicts(), comp_objects(), ddi_physmem_map(), elf_frame_free(), elf_page_fault(), elf_share(), find_area_and_lock(), hw_map(), klog_init(), load_segment(), main_bsp(), map_structure(), phys_page_fault(), pt_mapping_insert(), ptl0_create(), slab_space_alloc(), sys_futex_sleep_timeout(), sys_futex_wakeup(), sys_io(), sys_physmem_map(), task_run_program(), used_space_insert(), and used_space_remove().

#define PAGE_WIDTH   FRAME_WIDTH
 

Paging on AMD64

The space is divided in positive numbers - userspace and negative numbers - kernel space. The 'negative' space starting with 0xffff800000000000 and ending with 0xffffffff80000000 (-2GB) is identically mapped physical memory. The area (0xffffffff80000000 ... 0xffffffffffffffff is again identically mapped first 2GB.

ATTENTION - PA2KA(KA2PA(x)) != x if 'x' is in kernel

Definition at line 52 of file page.h.

Referenced by as_area_resize(), elf_frame_free(), and elf_page_fault().

#define PTL1_ADDR (  ptl0,
page   )     ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page))))
 

Definition at line 60 of file page.c.

Referenced by ident_page_fault().

#define PTL1_PRESENT (  ptl0,
page   )     (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
 

Definition at line 56 of file page.c.

Referenced by ident_page_fault().

#define PTL2_ADDR (  ptl1,
page   )     ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page))))
 

Definition at line 61 of file page.c.

Referenced by ident_page_fault().

#define PTL2_PRESENT (  ptl1,
page   )     (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
 

Definition at line 57 of file page.c.

Referenced by ident_page_fault().

#define PTL3_ADDR (  ptl2,
page   )     ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page))))
 

Definition at line 62 of file page.c.

Referenced by ident_page_fault().

#define PTL3_PRESENT (  ptl2,
page   )     (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
 

Definition at line 58 of file page.c.

Referenced by ident_page_fault().

#define PTL_2MB_PAGE   (1<<7)
 

Definition at line 46 of file ptl.h.

#define PTL_ACCESSED   (1<<5)
 

Definition at line 40 of file ptl.h.

#define PTL_CACHE_DISABLE   (1<<4)
 

Definition at line 41 of file ptl.h.

#define PTL_CACHE_THROUGH   (1<<3)
 

Definition at line 42 of file ptl.h.

#define PTL_NO_EXEC   (1<<63)
 

Definition at line 39 of file ptl.h.

#define PTL_PRESENT   1
 

Definition at line 45 of file ptl.h.

#define PTL_USER   (1<<2)
 

Definition at line 43 of file ptl.h.

#define PTL_WRITABLE   (1<<1)
 

Definition at line 44 of file ptl.h.

#define SETUP_FRAME (  ptl3,
page,
tgt   ) 
 

Value:

{       \
        SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
        SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }

Definition at line 76 of file page.c.

Referenced by ident_page_fault().

#define SETUP_PTL1 (  ptl0,
page,
tgt   ) 
 

Value:

{       \
        SET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
        SET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }

Definition at line 64 of file page.c.

Referenced by ident_page_fault().

#define SETUP_PTL2 (  ptl1,
page,
tgt   ) 
 

Value:

{       \
        SET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
        SET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }

Definition at line 68 of file page.c.

Referenced by ident_page_fault().

#define SETUP_PTL3 (  ptl2,
page,
tgt   ) 
 

Value:

{       \
        SET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
        SET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
    }

Definition at line 72 of file page.c.

Referenced by ident_page_fault().

#define tlb_arch_init (  void   ) 
 

Definition at line 38 of file tlb.h.

Referenced by tlb_init().

#define tlb_print (  void   ) 
 

Definition at line 39 of file tlb.h.

Referenced by cmd_tlb().

#define USER_ADDRESS_SPACE_END_ARCH   (unsigned long) 0x00007fffffffffff
 

Definition at line 43 of file as.h.

#define USER_ADDRESS_SPACE_START_ARCH   (unsigned long) 0x0000000000000000
 

Definition at line 42 of file as.h.

#define USTACK_ADDRESS_ARCH   (USER_ADDRESS_SPACE_END_ARCH-(PAGE_SIZE-1))
 

Definition at line 45 of file as.h.

Function Documentation

pte_t helper_ptl1 [512] __attribute__ (  (aligned(PAGE_SIZE))   ) 
 

void as_arch_init (  void   ) 
 

Referenced by as_init().

void frame_arch_init (  void   ) 
 

Referenced by frame_init().

size_t get_memory_size (  void   ) 
 

Definition at line 44 of file memory_init.c.

References e801memorysize.

Referenced by main_bsp().

__address hw_map (  __address  physaddr,
size_t  size
) 
 

Definition at line 201 of file page.c.

References ADDR2PFN(), ALIGN_UP, FRAME_SIZE, KERNEL_ADDRESS_SPACE_END_ARCH, last_frame, page_mapping_insert(), PAGE_NOT_CACHEABLE, PAGE_SIZE, panic, and PFN2ADDR().

Referenced by fb_init().

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void ident_page_fault (  int  n,
istate_t *  istate
) 
 

Identity page mapper

We need to map whole physical memory identically before the page subsystem is initializaed. This thing clears page table and fills in the specific items.

Definition at line 126 of file page.c.

References PAGE_NOT_PRESENT, PTL1_ADDR, PTL1_PRESENT, PTL2_ADDR, PTL2_PRESENT, PTL3_ADDR, PTL3_PRESENT, SETUP_FRAME, SETUP_PTL1, SETUP_PTL2, and SETUP_PTL3.

void memory_print_map (  void   ) 
 

Definition at line 49 of file memory_init.c.

References e820counter, e820table, and printf().

Referenced by arch_pre_smp_init().

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void page_arch_init (  void   ) 
 

Definition at line 82 of file page.c.

References AS_KERNEL, config_t::base, config, config_t::cpu_active, FRAME_SIZE, config_t::kernel_size, last_frame, PAGE_CACHEABLE, PAGE_EXEC, PAGE_GLOBAL, page_mapping_insert(), and pt_mapping_operations.

Referenced by page_init().

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void page_fault (  int  n,
istate_t *  istate
) 
 

Definition at line 174 of file page.c.

References as_page_fault(), istate::error_word, fault_if_from_uspace, panic, PF_ACCESS_EXEC, PF_ACCESS_READ, PF_ACCESS_WRITE, print_info_errcode(), and printf().

Referenced by as_page_fault().

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Variable Documentation

__u32 e801memorysize
 

Definition at line 42 of file memory_init.c.

Referenced by get_memory_size().

__u8 e820counter = 0xff
 

Definition at line 40 of file memory_init.c.

Referenced by memory_print_map().

struct e820memmap_ e820table[MEMMAP_E820_MAX_RECORDS]
 

Definition at line 41 of file memory_init.c.

Referenced by memory_print_map().

__address last_frame
 

Referenced by hw_map(), and page_arch_init().

pte_t ptl_0
 

Generated on Sun Jun 18 16:35:16 2006 for HelenOS Kernel (amd64) by  doxygen 1.4.6