WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/mips32/include/mm/page.h


/*
 * Copyright (C) 2003-2004 Jakub Jermar
 * 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.
 */
 
#ifndef __mips32_PAGE_H__
#define __mips32_PAGE_H__
 
#define PAGE_WIDTH  FRAME_WIDTH
#define PAGE_SIZE   FRAME_SIZE
 
#ifndef __ASM__
#  define KA2PA(x)  (((__address) (x)) - 0x80000000)
#  define PA2KA(x)  (((__address) (x)) + 0x80000000)
#else
#  define KA2PA(x)  ((x) - 0x80000000)
#  define PA2KA(x)  ((x) + 0x80000000)
#endif
 
/*
 * Implementation of generic 4-level page table interface.
 * NOTE: this implementation is under construction
 *
 * Page table layout:
 * - 32-bit virtual addresses
 * - Offset is 14 bits => pages are 16K long
 * - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long
 * - PTE's replace EntryLo v (valid) bit with p (present) bit
 * - PTE's use only one bit to distinguish between cacheable and uncacheable mappings
 * - PTE's define soft_valid field to ensure there is at least one 1 bit even if the p bit is cleared
 * - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed)
 * - PTL0 has 64 entries (6 bits)
 * - PTL1 is not used
 * - PTL2 is not used
 * - PTL3 has 4096 entries (12 bits)
 */
 
#define PTL0_INDEX_ARCH(vaddr)  ((vaddr)>>26) 
#define PTL1_INDEX_ARCH(vaddr)  0
#define PTL2_INDEX_ARCH(vaddr)  0
#define PTL3_INDEX_ARCH(vaddr)  (((vaddr)>>14)&0x3fff)
 
#define SET_PTL0_ADDRESS_ARCH(ptl0)
 
#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      (((pte_t *)(ptl0))[(i)].pfn<<12)
#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      (ptl1)
#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      (ptl2)
#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     (((pte_t *)(ptl3))[(i)].pfn<<12)
 
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   (((pte_t *)(ptl0))[(i)].pfn = (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)].pfn = (a)>>12)
 
#define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *)(ptl0), (index_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), (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)
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
 
#ifndef __ASM__
 
#include <arch/mm/tlb.h>
#include <mm/page.h>
#include <arch/mm/frame.h>
#include <arch/types.h>
 
static inline int get_pt_flags(pte_t *pt, index_t i)
{
    pte_t *p = &pt[i];
   
    return (
        (p->cacheable<<PAGE_CACHEABLE_SHIFT) |
        ((!p->p)<<PAGE_PRESENT_SHIFT) |
        (1<<PAGE_USER_SHIFT) |
        (1<<PAGE_READ_SHIFT) |
        ((p->w)<<PAGE_WRITE_SHIFT) |
        (1<<PAGE_EXEC_SHIFT) |
        (p->g<<PAGE_GLOBAL_SHIFT)
    );
       
}
 
static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
{
    pte_t *p = &pt[i];
   
    p->cacheable = (flags & PAGE_CACHEABLE) != 0;
    p->p = !(flags & PAGE_NOT_PRESENT);
    p->g = (flags & PAGE_GLOBAL) != 0;
    p->w = (flags & PAGE_WRITE) != 0;
   
    /*
     * Ensure that valid entries have at least one bit set.
     */
    p->soft_valid = 1;
}
 
extern void page_arch_init(void);
 
#endif /* __ASM__ */
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/include/mm/page.h – Rev 825 → 831

Rev 825		Rev 831
1	/*	1	/*
2	* Copyright (C) 2003-2004 Jakub Jermar	2	* Copyright (C) 2003-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#ifndef __mips32_PAGE_H__	29	#ifndef __mips32_PAGE_H__
30	#define __mips32_PAGE_H__	30	#define __mips32_PAGE_H__
31		31
32	#define PAGE_WIDTH FRAME_WIDTH	32	#define PAGE_WIDTH FRAME_WIDTH
33	#define PAGE_SIZE FRAME_SIZE	33	#define PAGE_SIZE FRAME_SIZE
34		34
35	#ifndef __ASM__	35	#ifndef __ASM__
36	# define KA2PA(x) (((__address) (x)) - 0x80000000)	36	# define KA2PA(x) (((__address) (x)) - 0x80000000)
37	# define PA2KA(x) (((__address) (x)) + 0x80000000)	37	# define PA2KA(x) (((__address) (x)) + 0x80000000)
38	#else	38	#else
39	# define KA2PA(x) ((x) - 0x80000000)	39	# define KA2PA(x) ((x) - 0x80000000)
40	# define PA2KA(x) ((x) + 0x80000000)	40	# define PA2KA(x) ((x) + 0x80000000)
41	#endif	41	#endif
42		42
43	/*	43	/*
44	* Implementation of generic 4-level page table interface.	44	* Implementation of generic 4-level page table interface.
45	* NOTE: this implementation is under construction	45	* NOTE: this implementation is under construction
46	*	46	*
47	* Page table layout:	47	* Page table layout:
48	* - 32-bit virtual addresses	48	* - 32-bit virtual addresses
49	* - Offset is 14 bits => pages are 16K long	49	* - Offset is 14 bits => pages are 16K long
50	* - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long	50	* - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long
-		51	* - PTE's replace EntryLo v (valid) bit with p (present) bit
-		52	* - PTE's use only one bit to distinguish between cacheable and uncacheable mappings
-		53	* - PTE's define soft_valid field to ensure there is at least one 1 bit even if the p bit is cleared
51	* - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed)	54	* - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed)
52	* - PTL0 has 64 entries (6 bits)	55	* - PTL0 has 64 entries (6 bits)
53	* - PTL1 is not used	56	* - PTL1 is not used
54	* - PTL2 is not used	57	* - PTL2 is not used
55	* - PTL3 has 4096 entries (12 bits)	58	* - PTL3 has 4096 entries (12 bits)
56	*/	59	*/
57		60
58	#define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26)	61	#define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26)
59	#define PTL1_INDEX_ARCH(vaddr) 0	62	#define PTL1_INDEX_ARCH(vaddr) 0
60	#define PTL2_INDEX_ARCH(vaddr) 0	63	#define PTL2_INDEX_ARCH(vaddr) 0
61	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14)&0x3fff)	64	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14)&0x3fff)
62		65
63	#define SET_PTL0_ADDRESS_ARCH(ptl0)	66	#define SET_PTL0_ADDRESS_ARCH(ptl0)
64		67
65	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].lo.pfn<<12)	68	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].pfn<<12)
66	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)	69	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)
67	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)	70	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)
68	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].lo.pfn<<12)	71	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].pfn<<12)
69		72
70	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].lo.pfn = (a)>>12)	73	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].pfn = (a)>>12)
71	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)	74	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
72	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)	75	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
73	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].lo.pfn = (a)>>12)	76	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].pfn = (a)>>12)
74		77
75	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	78	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
76	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT	79	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT
77	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT	80	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT
78	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	81	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
79		82
80	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	83	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
81	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)	84	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
82	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)	85	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
83	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	86	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
84		87
85	#ifndef __ASM__	88	#ifndef __ASM__
86		89
87	#include <arch/mm/tlb.h>	90	#include <arch/mm/tlb.h>
88	#include <mm/page.h>	91	#include <mm/page.h>
89	#include <arch/mm/frame.h>	92	#include <arch/mm/frame.h>
90	#include <arch/types.h>	93	#include <arch/types.h>
91		94
92	static inline int get_pt_flags(pte_t *pt, index_t i)	95	static inline int get_pt_flags(pte_t *pt, index_t i)
93	{	96	{
94	pte_t *p = &pt[i];	97	pte_t *p = &pt[i];
95		98
96	return (	99	return (
97	((p->lo.c>PAGE_UNCACHED)<<PAGE_CACHEABLE_SHIFT) \|	100	(p->cacheable<<PAGE_CACHEABLE_SHIFT) \|
98	((!p->lo.v)<<PAGE_PRESENT_SHIFT) \|	101	((!p->p)<<PAGE_PRESENT_SHIFT) \|
99	(1<<PAGE_USER_SHIFT) \|	102	(1<<PAGE_USER_SHIFT) \|
100	(1<<PAGE_READ_SHIFT) \|	103	(1<<PAGE_READ_SHIFT) \|
101	((p->w)<<PAGE_WRITE_SHIFT) \|	104	((p->w)<<PAGE_WRITE_SHIFT) \|
102	(1<<PAGE_EXEC_SHIFT) \|	105	(1<<PAGE_EXEC_SHIFT) \|
103	p->lo.g<<PAGE_GLOBAL_SHIFT	106	(p->g<<PAGE_GLOBAL_SHIFT)
104	);	107	);
105		108
106	}	109	}
107		110
108	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	111	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
109	{	112	{
110	pte_t *p = &pt[i];	113	pte_t *p = &pt[i];
111		114
112	p->lo.c = (flags & PAGE_CACHEABLE) != 0 ? PAGE_CACHEABLE_EXC_WRITE : PAGE_UNCACHED;	115	p->cacheable = (flags & PAGE_CACHEABLE) != 0;
113	p->lo.v = !(flags & PAGE_NOT_PRESENT);	116	p->p = !(flags & PAGE_NOT_PRESENT);
114	p->lo.g = (flags & PAGE_GLOBAL) != 0;	117	p->g = (flags & PAGE_GLOBAL) != 0;
115	p->w = (flags & PAGE_WRITE) != 0;	118	p->w = (flags & PAGE_WRITE) != 0;
-		119
-		120	/*
-		121	* Ensure that valid entries have at least one bit set.
-		122	*/
-		123	p->soft_valid = 1;
116	}	124	}
117		125
118	extern void page_arch_init(void);	126	extern void page_arch_init(void);
119		127
120	#endif /* __ASM__ */	128	#endif /* __ASM__ */
121		129
122	#endif	130	#endif
123		131