0,0 → 1,186 |
/* |
* Copyright (C) 2005 Ondrej Palkovsky |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** 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 |
*/ |
|
#ifndef __amd64_PAGE_H__ |
#define __amd64_PAGE_H__ |
|
#include <arch/mm/frame.h> |
|
#define PAGE_WIDTH FRAME_WIDTH |
#define PAGE_SIZE FRAME_SIZE |
|
#ifdef KERNEL |
|
#ifndef __ASM__ |
# include <mm/page.h> |
# include <arch/types.h> |
#endif |
|
#ifndef __ASM__ |
static inline __address ka2pa(__address x) |
{ |
if (x > 0xffffffff80000000) |
return x - 0xffffffff80000000; |
else |
return x - 0xffff800000000000; |
} |
/* Linker symbol */ |
extern int ktext_start; |
extern int kdata_end; |
static inline __address pa2ka(__address x) |
{ |
if (x >= ka2pa((__address)(&kdata_end)) || \ |
x <= ka2pa((__address)&ktext_start)) |
return x + 0xffff800000000000; |
else |
return x + 0xffffffff80000000; |
} |
# define KA2PA(x) ka2pa((__address)x) |
# define PA2KA(x) pa2ka((__address)x) |
# define PA2KA_IDENT(x) (((__address) (x)) + 0xffff800000000000) |
# define PA2KA_CODE(x) (((__address) (x)) + 0xffffffff80000000) |
#else |
# define KA2PA(x) ((x) - 0xffffffff80000000) |
# define PA2KA(x) ((x) + 0xffffffff80000000) |
# define PA2KA_DATA(x) ((x) + 0xffff800000000000) |
#endif |
|
#define PTL0_ENTRIES_ARCH 512 |
#define PTL1_ENTRIES_ARCH 512 |
#define PTL2_ENTRIES_ARCH 512 |
#define PTL3_ENTRIES_ARCH 512 |
|
#define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff) |
#define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff) |
#define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff) |
#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff) |
|
#define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *) ((((__u64) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 ))) |
#define GET_PTL2_ADDRESS_ARCH(ptl1, i) ((pte_t *) ((((__u64) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 ))) |
#define GET_PTL3_ADDRESS_ARCH(ptl2, i) ((pte_t *) ((((__u64) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 ))) |
#define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address *) ((((__u64) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 ))) |
|
#define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0))) |
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a) |
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a) |
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a) |
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a) |
|
#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
#define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i)) |
#define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i)) |
#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
|
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x)) |
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x)) |
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
|
#define PTE_VALID_ARCH(p) (*((__u64 *) (p)) != 0) |
#define PTE_PRESENT_ARCH(p) ((p)->present != 0) |
#define PTE_GET_FRAME_ARCH(p) ((((__address)(p)->addr_12_31)<<12) | ((__address)(p)->addr_32_51<<32)) |
|
#ifndef __ASM__ |
|
/** Page Table Entry. */ |
struct page_specifier { |
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 unused: 1; |
unsigned global : 1; |
unsigned soft_valid : 1; /**< Valid content even if present bit is cleared. */ |
unsigned avl : 2; |
unsigned addr_12_31 : 30; |
unsigned addr_32_51 : 21; |
unsigned no_execute : 1; |
} __attribute__ ((packed)); |
|
static inline int get_pt_flags(pte_t *pt, index_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 | |
(!p->no_execute)<<PAGE_EXEC_SHIFT | |
p->global<<PAGE_GLOBAL_SHIFT |
); |
} |
|
static inline void set_pt_addr(pte_t *pt, index_t i, __address a) |
{ |
pte_t *p = &pt[i]; |
|
p->addr_12_31 = (a >> 12) & 0xfffff; |
p->addr_32_51 = a >> 32; |
} |
|
static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
{ |
pte_t *p = &pt[i]; |
|
p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
p->present = !(flags & PAGE_NOT_PRESENT); |
p->uaccessible = (flags & PAGE_USER) != 0; |
p->writeable = (flags & PAGE_WRITE) != 0; |
p->no_execute = (flags & PAGE_EXEC) == 0; |
p->global = (flags & PAGE_GLOBAL) != 0; |
|
/* |
* Ensure that there is at least one bit set even if the present bit is cleared. |
*/ |
p->soft_valid = 1; |
} |
|
extern void page_arch_init(void); |
|
#endif /* __ASM__ */ |
|
#endif /* KERNEL */ |
|
#endif |