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.
 */
 
/** @addtogroup mips32mm   
 * @{
 */
/** @file
 */
 
#ifndef __mips32_PAGE_H__
#define __mips32_PAGE_H__
 
#include <arch/mm/frame.h>
 
#define PAGE_WIDTH  FRAME_WIDTH
#define PAGE_SIZE   FRAME_SIZE
 
#ifndef __ASM__
#  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)
#endif
 
#ifdef KERNEL
 
/*
 * 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_ENTRIES_ARCH   64
#define PTL1_ENTRIES_ARCH   0
#define PTL2_ENTRIES_ARCH   0
#define PTL3_ENTRIES_ARCH   4096
 
#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) & 0xfff)
 
#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))
 
#define PTE_VALID_ARCH(pte)         (*((uint32_t *) (pte)) != 0)
#define PTE_PRESENT_ARCH(pte)           ((pte)->p != 0)
#define PTE_GET_FRAME_ARCH(pte)         ((pte)->pfn<<12)
#define PTE_WRITABLE_ARCH(pte)          ((pte)->w != 0)
#define PTE_EXECUTABLE_ARCH(pte)        1
 
#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 /* KERNEL */
 
#endif
 
/** @}
 */
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/include/mm/page.h – Rev 1776 → 1780

Rev 1776		Rev 1780
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	/** @addtogroup mips32mm	29	/** @addtogroup mips32mm
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#ifndef __mips32_PAGE_H__	35	#ifndef __mips32_PAGE_H__
36	#define __mips32_PAGE_H__	36	#define __mips32_PAGE_H__
37		37
38	#include <arch/mm/frame.h>	38	#include <arch/mm/frame.h>
39		39
40	#define PAGE_WIDTH FRAME_WIDTH	40	#define PAGE_WIDTH FRAME_WIDTH
41	#define PAGE_SIZE FRAME_SIZE	41	#define PAGE_SIZE FRAME_SIZE
42		42
43	#ifndef __ASM__	43	#ifndef __ASM__
44	# define KA2PA(x) (((__address) (x)) - 0x80000000)	44	# define KA2PA(x) (((uintptr_t) (x)) - 0x80000000)
45	# define PA2KA(x) (((__address) (x)) + 0x80000000)	45	# define PA2KA(x) (((uintptr_t) (x)) + 0x80000000)
46	#else	46	#else
47	# define KA2PA(x) ((x) - 0x80000000)	47	# define KA2PA(x) ((x) - 0x80000000)
48	# define PA2KA(x) ((x) + 0x80000000)	48	# define PA2KA(x) ((x) + 0x80000000)
49	#endif	49	#endif
50		50
51	#ifdef KERNEL	51	#ifdef KERNEL
52		52
53	/*	53	/*
54	* Implementation of generic 4-level page table interface.	54	* Implementation of generic 4-level page table interface.
55	* NOTE: this implementation is under construction	55	* NOTE: this implementation is under construction
56	*	56	*
57	* Page table layout:	57	* Page table layout:
58	* - 32-bit virtual addresses	58	* - 32-bit virtual addresses
59	* - Offset is 14 bits => pages are 16K long	59	* - Offset is 14 bits => pages are 16K long
60	* - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long	60	* - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long
61	* - PTE's replace EntryLo v (valid) bit with p (present) bit	61	* - PTE's replace EntryLo v (valid) bit with p (present) bit
62	* - PTE's use only one bit to distinguish between cacheable and uncacheable mappings	62	* - PTE's use only one bit to distinguish between cacheable and uncacheable mappings
63	* - PTE's define soft_valid field to ensure there is at least one 1 bit even if the p bit is cleared	63	* - PTE's define soft_valid field to ensure there is at least one 1 bit even if the p bit is cleared
64	* - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed)	64	* - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed)
65	* - PTL0 has 64 entries (6 bits)	65	* - PTL0 has 64 entries (6 bits)
66	* - PTL1 is not used	66	* - PTL1 is not used
67	* - PTL2 is not used	67	* - PTL2 is not used
68	* - PTL3 has 4096 entries (12 bits)	68	* - PTL3 has 4096 entries (12 bits)
69	*/	69	*/
70		70
71	#define PTL0_ENTRIES_ARCH 64	71	#define PTL0_ENTRIES_ARCH 64
72	#define PTL1_ENTRIES_ARCH 0	72	#define PTL1_ENTRIES_ARCH 0
73	#define PTL2_ENTRIES_ARCH 0	73	#define PTL2_ENTRIES_ARCH 0
74	#define PTL3_ENTRIES_ARCH 4096	74	#define PTL3_ENTRIES_ARCH 4096
75		75
76	#define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26)	76	#define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26)
77	#define PTL1_INDEX_ARCH(vaddr) 0	77	#define PTL1_INDEX_ARCH(vaddr) 0
78	#define PTL2_INDEX_ARCH(vaddr) 0	78	#define PTL2_INDEX_ARCH(vaddr) 0
79	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14) & 0xfff)	79	#define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14) & 0xfff)
80		80
81	#define SET_PTL0_ADDRESS_ARCH(ptl0)	81	#define SET_PTL0_ADDRESS_ARCH(ptl0)
82		82
83	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].pfn<<12)	83	#define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].pfn<<12)
84	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)	84	#define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)
85	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)	85	#define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)
86	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].pfn<<12)	86	#define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].pfn<<12)
87		87
88	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].pfn = (a)>>12)	88	#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].pfn = (a)>>12)
89	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)	89	#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
90	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)	90	#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
91	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].pfn = (a)>>12)	91	#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].pfn = (a)>>12)
92		92
93	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))	93	#define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
94	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT	94	#define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT
95	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT	95	#define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT
96	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))	96	#define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
97		97
98	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))	98	#define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
99	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)	99	#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
100	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)	100	#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
101	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))	101	#define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
102		102
103	#define PTE_VALID_ARCH(pte) (((__u32 ) (pte)) != 0)	103	#define PTE_VALID_ARCH(pte) (((uint32_t ) (pte)) != 0)
104	#define PTE_PRESENT_ARCH(pte) ((pte)->p != 0)	104	#define PTE_PRESENT_ARCH(pte) ((pte)->p != 0)
105	#define PTE_GET_FRAME_ARCH(pte) ((pte)->pfn<<12)	105	#define PTE_GET_FRAME_ARCH(pte) ((pte)->pfn<<12)
106	#define PTE_WRITABLE_ARCH(pte) ((pte)->w != 0)	106	#define PTE_WRITABLE_ARCH(pte) ((pte)->w != 0)
107	#define PTE_EXECUTABLE_ARCH(pte) 1	107	#define PTE_EXECUTABLE_ARCH(pte) 1
108		108
109	#ifndef __ASM__	109	#ifndef __ASM__
110		110
111	#include <arch/mm/tlb.h>	111	#include <arch/mm/tlb.h>
112	#include <mm/page.h>	112	#include <mm/page.h>
113	#include <arch/mm/frame.h>	113	#include <arch/mm/frame.h>
114	#include <arch/types.h>	114	#include <arch/types.h>
115		115
116	static inline int get_pt_flags(pte_t *pt, index_t i)	116	static inline int get_pt_flags(pte_t *pt, index_t i)
117	{	117	{
118	pte_t *p = &pt[i];	118	pte_t *p = &pt[i];
119		119
120	return (	120	return (
121	(p->cacheable<<PAGE_CACHEABLE_SHIFT) \|	121	(p->cacheable<<PAGE_CACHEABLE_SHIFT) \|
122	((!p->p)<<PAGE_PRESENT_SHIFT) \|	122	((!p->p)<<PAGE_PRESENT_SHIFT) \|
123	(1<<PAGE_USER_SHIFT) \|	123	(1<<PAGE_USER_SHIFT) \|
124	(1<<PAGE_READ_SHIFT) \|	124	(1<<PAGE_READ_SHIFT) \|
125	((p->w)<<PAGE_WRITE_SHIFT) \|	125	((p->w)<<PAGE_WRITE_SHIFT) \|
126	(1<<PAGE_EXEC_SHIFT) \|	126	(1<<PAGE_EXEC_SHIFT) \|
127	(p->g<<PAGE_GLOBAL_SHIFT)	127	(p->g<<PAGE_GLOBAL_SHIFT)
128	);	128	);
129		129
130	}	130	}
131		131
132	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)	132	static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
133	{	133	{
134	pte_t *p = &pt[i];	134	pte_t *p = &pt[i];
135		135
136	p->cacheable = (flags & PAGE_CACHEABLE) != 0;	136	p->cacheable = (flags & PAGE_CACHEABLE) != 0;
137	p->p = !(flags & PAGE_NOT_PRESENT);	137	p->p = !(flags & PAGE_NOT_PRESENT);
138	p->g = (flags & PAGE_GLOBAL) != 0;	138	p->g = (flags & PAGE_GLOBAL) != 0;
139	p->w = (flags & PAGE_WRITE) != 0;	139	p->w = (flags & PAGE_WRITE) != 0;
140		140
141	/*	141	/*
142	* Ensure that valid entries have at least one bit set.	142	* Ensure that valid entries have at least one bit set.
143	*/	143	*/
144	p->soft_valid = 1;	144	p->soft_valid = 1;
145	}	145	}
146		146
147	extern void page_arch_init(void);	147	extern void page_arch_init(void);
148		148
149	#endif /* __ASM__ */	149	#endif /* __ASM__ */
150		150
151	#endif /* KERNEL */	151	#endif /* KERNEL */
152		152
153	#endif	153	#endif
154		154
155	/** @}	155	/** @}
156	*/	156	*/
157		157