WebSVN – HelenOS – Diff – /trunk/kernel/arch/sparc64/include/trap/mmu.h


/*
 * Copyright (C) 2006 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 sparc64interrupt
 * @{
 */
/**
 * @file
 * @brief This file contains fast MMU trap handlers.
 */
 
#ifndef __sparc64_MMU_TRAP_H__
#define __sparc64_MMU_TRAP_H__
 
#include <arch/stack.h>
#include <arch/regdef.h>
#include <arch/mm/tlb.h>
#include <arch/mm/mmu.h>
#include <arch/mm/tte.h>
 
#define TT_FAST_INSTRUCTION_ACCESS_MMU_MISS 0x64
#define TT_FAST_DATA_ACCESS_MMU_MISS        0x68
#define TT_FAST_DATA_ACCESS_PROTECTION      0x6c
 
#define FAST_MMU_HANDLER_SIZE           128
 
#ifdef __ASM__
.macro FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER
    save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
    call fast_instruction_access_mmu_miss
    nop
    restore
    retry  
.endm
 
.macro FAST_DATA_ACCESS_MMU_MISS_HANDLER
    /*
     * First, try to refill TLB from TSB.
     */
    ! TODO
 
    /*
     * Second, test if it is the portion of the kernel address space
     * which is faulting. If that is the case, immediately create
     * identity mapping for that page in DTLB. VPN 0 is excluded from
     * this treatment.
     *
     * Note that branch-delay slots are used in order to save space.
     */
0:
    mov VA_DMMU_TAG_ACCESS, %g1
    ldxa [%g1] ASI_DMMU, %g1            ! read the faulting Context and VPN
    set TLB_TAG_ACCESS_CONTEXT_MASK, %g2
    andcc %g1, %g2, %g3             ! get Context
    bnz 0f                      ! Context is non-zero
    andncc %g1, %g2, %g3                ! get page address into %g3
    bz 0f                       ! page address is zero
 
 
 
 
 
 
    or %g3, (TTE_CP|TTE_P|TTE_W), %g2       ! 8K pages are the default (encoded as 0)
        set 1, %g3
        sllx %g3, TTE_V_SHIFT, %g3
        or %g2, %g3, %g2
    stxa %g2, [%g0] ASI_DTLB_DATA_IN_REG        ! identity map the kernel page
    retry
 
    /*
     * Third, catch and handle special cases when the trap is caused by
     * some register window trap handler.
     */
0:
    ! TODO
 
0:
    wrpr %g0, PSTATE_PRIV_BIT | PSTATE_AG_BIT, %pstate
    PREEMPTIBLE_HANDLER fast_data_access_mmu_miss
.endm
 
.macro FAST_DATA_ACCESS_PROTECTION_HANDLER
    save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
    call fast_data_access_protection
    nop
    restore
    retry
.endm
#endif /* __ASM__ */
 
#endif
 
/** @}
 */
 

Rev 1851	Rev 1852
1	/*	1	/*
2	* Copyright (C) 2006 Jakub Jermar	2	* Copyright (C) 2006 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 sparc64interrupt	29	/** @addtogroup sparc64interrupt
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief This file contains fast MMU trap handlers.	34	* @brief This file contains fast MMU trap handlers.
35	*/	35	*/
36		36
37	#ifndef __sparc64_MMU_TRAP_H__	37	#ifndef __sparc64_MMU_TRAP_H__
38	#define __sparc64_MMU_TRAP_H__	38	#define __sparc64_MMU_TRAP_H__
39		39
40	#include <arch/stack.h>	40	#include <arch/stack.h>
-		41	#include <arch/regdef.h>
41	#include <arch/mm/tlb.h>	42	#include <arch/mm/tlb.h>
42	#include <arch/mm/mmu.h>	43	#include <arch/mm/mmu.h>
43	#include <arch/mm/tte.h>	44	#include <arch/mm/tte.h>
44		45
45	#define TT_FAST_INSTRUCTION_ACCESS_MMU_MISS 0x64	46	#define TT_FAST_INSTRUCTION_ACCESS_MMU_MISS 0x64
46	#define TT_FAST_DATA_ACCESS_MMU_MISS 0x68	47	#define TT_FAST_DATA_ACCESS_MMU_MISS 0x68
47	#define TT_FAST_DATA_ACCESS_PROTECTION 0x6c	48	#define TT_FAST_DATA_ACCESS_PROTECTION 0x6c
48		49
49	#define FAST_MMU_HANDLER_SIZE 128	50	#define FAST_MMU_HANDLER_SIZE 128
50		51
51	#ifdef __ASM__	52	#ifdef __ASM__
52	.macro FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER	53	.macro FAST_INSTRUCTION_ACCESS_MMU_MISS_HANDLER
53	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp	54	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
54	call fast_instruction_access_mmu_miss	55	call fast_instruction_access_mmu_miss
55	nop	56	nop
56	restore	57	restore
57	retry	58	retry
58	.endm	59	.endm
59		60
60	.macro FAST_DATA_ACCESS_MMU_MISS_HANDLER	61	.macro FAST_DATA_ACCESS_MMU_MISS_HANDLER
61	/*	62	/*
-		63	* First, try to refill TLB from TSB.
-		64	*/
-		65	! TODO
-		66
-		67	/*
62	* First, test if it is the portion of the kernel address space	68	* Second, test if it is the portion of the kernel address space
63	* which is faulting. If that is the case, immediately create	69	* which is faulting. If that is the case, immediately create
64	* identity mapping for that page in DTLB. VPN 0 is excluded from	70	* identity mapping for that page in DTLB. VPN 0 is excluded from
65	* this treatment.	71	* this treatment.
66	*	72	*
67	* Note that branch-delay slots are used in order to save space.	73	* Note that branch-delay slots are used in order to save space.
68	*/	74	*/
-		75	0:
69	mov VA_DMMU_TAG_ACCESS, %g1	76	mov VA_DMMU_TAG_ACCESS, %g1
70	ldxa [%g1] ASI_DMMU, %g1 ! read the faulting Context and VPN	77	ldxa [%g1] ASI_DMMU, %g1 ! read the faulting Context and VPN
71	set TLB_TAG_ACCESS_CONTEXT_MASK, %g2	78	set TLB_TAG_ACCESS_CONTEXT_MASK, %g2
72	andcc %g1, %g2, %g3 ! get Context	79	andcc %g1, %g2, %g3 ! get Context
73	bnz 0f ! Context is non-zero	80	bnz 0f ! Context is non-zero
74	andncc %g1, %g2, %g3 ! get page address into %g3	81	andncc %g1, %g2, %g3 ! get page address into %g3
75	bz 0f ! page address is zero	82	bz 0f ! page address is zero
76		83
77	/*	-
78	* Create and insert the identity-mapped entry for	-
79	* the faulting kernel page.	-
80	*/	-
81		-
82	or %g3, (TTE_CP\|TTE_P\|TTE_W), %g2 ! 8K pages are the default (encoded as 0)	84	or %g3, (TTE_CP\|TTE_P\|TTE_W), %g2 ! 8K pages are the default (encoded as 0)
83	set 1, %g3	85	set 1, %g3
84	sllx %g3, TTE_V_SHIFT, %g3	86	sllx %g3, TTE_V_SHIFT, %g3
85	or %g2, %g3, %g2	87	or %g2, %g3, %g2
86	stxa %g2, [%g0] ASI_DTLB_DATA_IN_REG ! identity map the kernel page	88	stxa %g2, [%g0] ASI_DTLB_DATA_IN_REG ! identity map the kernel page
87	retry	89	retry
88		90
-		91	/*
-		92	* Third, catch and handle special cases when the trap is caused by
-		93	* some register window trap handler.
-		94	*/
-		95	0:
-		96	! TODO
-		97
89	0:	98	0:
90	save %sp, -PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE, %sp	99	wrpr %g0, PSTATE_PRIV_BIT \| PSTATE_AG_BIT, %pstate
91	PREEMPTIBLE_HANDLER fast_data_access_mmu_miss	100	PREEMPTIBLE_HANDLER fast_data_access_mmu_miss
92	.endm	101	.endm
93		102
94	.macro FAST_DATA_ACCESS_PROTECTION_HANDLER	103	.macro FAST_DATA_ACCESS_PROTECTION_HANDLER
95	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp	104	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
96	call fast_data_access_protection	105	call fast_data_access_protection
97	nop	106	nop
98	restore	107	restore
99	retry	108	retry
100	.endm	109	.endm
101	#endif /* __ASM__ */	110	#endif /* __ASM__ */
102		111
103	#endif	112	#endif
104		113
105	/** @}	114	/** @}
106	*/	115	*/
107		116

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/sparc64/include/trap/mmu.h – Rev 1851 → 1852