WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia64/src/mm/page.c


/*
 * Copyright (C) 2006 Jakub Jermar
 * Copyright (C) 2006 Jakub Vana
 * 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.
 */
 
#include <arch/mm/page.h>
#include <genarch/mm/page_ht.h>
#include <mm/asid.h>
#include <arch/mm/asid.h>
#include <arch/types.h>
#include <typedefs.h>
#include <print.h>
#include <mm/page.h>
#include <mm/frame.h>
#include <config.h>
#include <panic.h>
#include <arch/asm.h>
#include <arch/barrier.h>
#include <memstr.h>
 
static void set_environment(void);
 
/** Initialize ia64 virtual address translation subsystem. */
void page_arch_init(void)
{
    page_mapping_operations = &ht_mapping_operations;
    pk_disable();
    set_environment();
}
 
/** Initialize VHPT and region registers. */
void set_environment(void)
{
 
 
    region_register rr;
    pta_register pta;  
    int i;
 
    /*
     * First set up kernel region register.
     * This action is redundand (see start.S) but I would to keep it to make sure that
     *no unexpected changes will be made.
     */
    rr.word = rr_read(VRN_KERNEL);
    rr.map.ve = 0;                  /* disable VHPT walker */
    rr.map.ps = PAGE_WIDTH;
    rr.map.rid = ASID2RID(ASID_KERNEL,VRN_KERNEL);  
    rr_write(VRN_KERNEL, rr.word);
    srlz_i();
    srlz_d();
   
    /*
     * And invalidate the rest of region register.
     */
    for(i = 0; i < REGION_REGISTERS; i++) {
        /* skip kernel rr */
        if (i == VRN_KERNEL)
            continue;
   
        rr.word == rr_read(i);
        rr.map.ve = 0;      /* disable VHPT walker */
        rr.map.rid = ASID2RID(ASID_INVALID,i);
        rr_write(i, rr.word);
        srlz_i();
        srlz_d();
    }
 
    /*
     * Set up PTA register.
     */
    pta.word = pta_read();
    pta.map.ve = 0;                   /* disable VHPT walker */
    pta.map.vf = 1;                   /* large entry format */
    pta.map.size = VHPT_WIDTH;
    pta.map.base = VHPT_BASE >> PTA_BASE_SHIFT;
    pta_write(pta.word);
    srlz_i();
    srlz_d();
   
 
 
    return ;   
   
}
 
/** Calculate address of collision chain from VPN and ASID.
 *
 * Interrupts must be disabled.
 *
 * @param page Address of virtual page including VRN bits.
 * @param asid Address space identifier.
 *
 * @return VHPT entry address.
 */
vhpt_entry_t *vhpt_hash(__address page, asid_t asid)
{
    region_register rr_save, rr;
    index_t vrn;
    rid_t rid;
    vhpt_entry_t *v;
 
    vrn = page >> VRN_SHIFT;
    rid = ASID2RID(asid, vrn);
   
    rr_save.word = rr_read(vrn);
    if (rr_save.map.rid == rid) {
        /*
         * The RID is already in place, compute thash and return.
         */
        v = (vhpt_entry_t *) thash(page);
        return v;
    }
   
    /*
     * The RID must be written to some region register.
     * To speed things up, register indexed by vrn is used.
     */
    rr.word = rr_save.word;
    rr.map.rid = rid;
    rr_write(vrn, rr.word);
    srlz_i();
    v = (vhpt_entry_t *) thash(page);
    rr_write(vrn, rr_save.word);
    srlz_i();
    srlz_d();
 
    return v;
}
 
/** Compare ASID and VPN against PTE.
 *
 * Interrupts must be disabled.
 *
 * @param page Address of virtual page including VRN bits.
 * @param asid Address space identifier.
 *
 * @return True if page and asid match the page and asid of t, false otherwise.
 */
bool vhpt_compare(__address page, asid_t asid, vhpt_entry_t *v)
{
    region_register rr_save, rr;   
    index_t vrn;
    rid_t rid;
    bool match;
 
    ASSERT(v);
 
    vrn = page >> VRN_SHIFT;
    rid = ASID2RID(asid, vrn);
   
    rr_save.word = rr_read(vrn);
    if (rr_save.map.rid == rid) {
        /*
         * The RID is already in place, compare ttag with t and return.
         */
        return ttag(page) == v->present.tag.tag_word;
    }
   
    /*
     * The RID must be written to some region register.
     * To speed things up, register indexed by vrn is used.
     */
    rr.word = rr_save.word;
    rr.map.rid = rid;
    rr_write(vrn, rr.word);
    srlz_i();
    match = (ttag(page) == v->present.tag.tag_word);
    rr_write(vrn, rr_save.word);
    srlz_i();
    srlz_d();
 
    return match;      
}
 
/** Set up one VHPT entry.
 *
 * @param t VHPT entry to be set up.
 * @param page Virtual address of the page mapped by the entry.
 * @param asid Address space identifier of the address space to which page belongs.
 * @param frame Physical address of the frame to wich page is mapped.
 * @param flags Different flags for the mapping.
 */
void vhpt_set_record(vhpt_entry_t *v, __address page, asid_t asid, __address frame, int flags)
{
    region_register rr_save, rr;   
    index_t vrn;
    rid_t rid;
    __u64 tag;
 
    ASSERT(v);
 
    vrn = page >> VRN_SHIFT;
    rid = ASID2RID(asid, vrn);
   
    /*
     * Compute ttag.
     */
    rr_save.word = rr_read(vrn);
    rr.word = rr_save.word;
    rr.map.rid = rid;
    rr_write(vrn, rr.word);
    srlz_i();
    tag = ttag(page);
    rr_write(vrn, rr_save.word);
    srlz_i();
    srlz_d();
   
    /*
     * Clear the entry.
     */
    v->word[0] = 0;
    v->word[1] = 0;
    v->word[2] = 0;
    v->word[3] = 0;
   
    v->present.p = true;
    v->present.ma = (flags & PAGE_CACHEABLE) ? MA_WRITEBACK : MA_UNCACHEABLE;
    v->present.a = false;   /* not accessed */
    v->present.d = false;   /* not dirty */
    v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL;
    v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ;
    v->present.ar |= (flags & PAGE_EXEC) ? AR_EXECUTE : 0;
    v->present.ppn = frame >> PPN_SHIFT;
    v->present.ed = false;  /* exception not deffered */
    v->present.ps = PAGE_WIDTH;
    v->present.key = 0;
    v->present.tag.tag_word = tag;
}
 

Rev 869	Rev 879
1	/*	1	/*
2	* Copyright (C) 2006 Jakub Jermar	2	* Copyright (C) 2006 Jakub Jermar
3	* Copyright (C) 2006 Jakub Vana	3	* Copyright (C) 2006 Jakub Vana
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	#include <arch/mm/page.h>	30	#include <arch/mm/page.h>
31	#include <genarch/mm/page_ht.h>	31	#include <genarch/mm/page_ht.h>
32	#include <mm/asid.h>	32	#include <mm/asid.h>
33	#include <arch/mm/asid.h>	33	#include <arch/mm/asid.h>
34	#include <arch/types.h>	34	#include <arch/types.h>
35	#include <typedefs.h>	35	#include <typedefs.h>
36	#include <print.h>	36	#include <print.h>
37	#include <mm/page.h>	37	#include <mm/page.h>
38	#include <mm/frame.h>	38	#include <mm/frame.h>
39	#include <config.h>	39	#include <config.h>
40	#include <panic.h>	40	#include <panic.h>
41	#include <arch/asm.h>	41	#include <arch/asm.h>
42	#include <arch/barrier.h>	42	#include <arch/barrier.h>
43	#include <memstr.h>	43	#include <memstr.h>
44		44
45	static void set_environment(void);	45	static void set_environment(void);
46		46
47	/** Initialize ia64 virtual address translation subsystem. */	47	/** Initialize ia64 virtual address translation subsystem. */
48	void page_arch_init(void)	48	void page_arch_init(void)
49	{	49	{
50	page_mapping_operations = &ht_mapping_operations;	50	page_mapping_operations = &ht_mapping_operations;
51	pk_disable();	51	pk_disable();
52	set_environment();	52	set_environment();
53	}	53	}
54		54
55	/** Initialize VHPT and region registers. */	55	/** Initialize VHPT and region registers. */
56	void set_environment(void)	56	void set_environment(void)
57	{	57	{
58		58
59	//#ifdef NEVERDEFINED	-
60	region_register rr;	59	region_register rr;
61	pta_register pta;	60	pta_register pta;
62	int i;	61	int i;
63		62
64	/*	63	/*
65	* First set up kernel region register.	64	* First set up kernel region register.
-		65	* This action is redundand (see start.S) but I would to keep it to make sure that
-		66	*no unexpected changes will be made.
66	*/	67	*/
67	rr.word = rr_read(VRN_KERNEL);	68	rr.word = rr_read(VRN_KERNEL);
68	rr.map.ve = 0; /* disable VHPT walker */	69	rr.map.ve = 0; /* disable VHPT walker */
69	rr.map.ps = PAGE_WIDTH;	70	rr.map.ps = PAGE_WIDTH;
70	rr.map.rid = ASID_KERNEL;	71	rr.map.rid = ASID2RID(ASID_KERNEL,VRN_KERNEL);
71	rr_write(VRN_KERNEL, rr.word);	72	rr_write(VRN_KERNEL, rr.word);
72	srlz_i();	73	srlz_i();
73	srlz_d();	74	srlz_d();
74		75
75	/*	76	/*
76	* And invalidate the rest of region register.	77	* And invalidate the rest of region register.
77	*/	78	*/
78	for(i = 0; i < REGION_REGISTERS; i++) {	79	for(i = 0; i < REGION_REGISTERS; i++) {
79	/* skip kernel rr */	80	/* skip kernel rr */
80	if (i == VRN_KERNEL)	81	if (i == VRN_KERNEL)
81	continue;	82	continue;
82		83
83	rr.word == rr_read(i);	84	rr.word == rr_read(i);
84	rr.map.ve = 0; /* disable VHPT walker */	85	rr.map.ve = 0; /* disable VHPT walker */
85	rr.map.rid = ASID_INVALID;	86	rr.map.rid = ASID2RID(ASID_INVALID,i);
86	rr_write(i, rr.word);	87	rr_write(i, rr.word);
87	srlz_i();	88	srlz_i();
88	srlz_d();	89	srlz_d();
89	}	90	}
90		91
91	/*	92	/*
92	* Set up PTA register.	93	* Set up PTA register.
93	*/	94	*/
94	pta.word = pta_read();	95	pta.word = pta_read();
95	pta.map.ve = 0; /* disable VHPT walker */	96	pta.map.ve = 0; /* disable VHPT walker */
96	pta.map.vf = 1; /* large entry format */	97	pta.map.vf = 1; /* large entry format */
97	pta.map.size = VHPT_WIDTH;	98	pta.map.size = VHPT_WIDTH;
98	pta.map.base = VHPT_BASE >> PTA_BASE_SHIFT;	99	pta.map.base = VHPT_BASE >> PTA_BASE_SHIFT;
99	pta_write(pta.word);	100	pta_write(pta.word);
100	srlz_i();	101	srlz_i();
101	srlz_d();	102	srlz_d();
102		103
103	//#endif	-
104		104
105	return ;	105	return ;
106		106
107	}	107	}
108		108
109	/** Calculate address of collision chain from VPN and ASID.	109	/** Calculate address of collision chain from VPN and ASID.
110	*	110	*
111	* Interrupts must be disabled.	111	* Interrupts must be disabled.
112	*	112	*
113	* @param page Address of virtual page including VRN bits.	113	* @param page Address of virtual page including VRN bits.
114	* @param asid Address space identifier.	114	* @param asid Address space identifier.
115	*	115	*
116	* @return VHPT entry address.	116	* @return VHPT entry address.
117	*/	117	*/
118	vhpt_entry_t *vhpt_hash(__address page, asid_t asid)	118	vhpt_entry_t *vhpt_hash(__address page, asid_t asid)
119	{	119	{
120	region_register rr_save, rr;	120	region_register rr_save, rr;
121	index_t vrn;	121	index_t vrn;
122	rid_t rid;	122	rid_t rid;
123	vhpt_entry_t *v;	123	vhpt_entry_t *v;
124		124
125	vrn = page >> VRN_SHIFT;	125	vrn = page >> VRN_SHIFT;
126	rid = ASID2RID(asid, vrn);	126	rid = ASID2RID(asid, vrn);
127		127
128	rr_save.word = rr_read(vrn);	128	rr_save.word = rr_read(vrn);
129	if (rr_save.map.rid == rid) {	129	if (rr_save.map.rid == rid) {
130	/*	130	/*
131	* The RID is already in place, compute thash and return.	131	* The RID is already in place, compute thash and return.
132	*/	132	*/
133	v = (vhpt_entry_t *) thash(page);	133	v = (vhpt_entry_t *) thash(page);
134	return v;	134	return v;
135	}	135	}
136		136
137	/*	137	/*
138	* The RID must be written to some region register.	138	* The RID must be written to some region register.
139	* To speed things up, register indexed by vrn is used.	139	* To speed things up, register indexed by vrn is used.
140	*/	140	*/
141	rr.word = rr_save.word;	141	rr.word = rr_save.word;
142	rr.map.rid = rid;	142	rr.map.rid = rid;
143	rr_write(vrn, rr.word);	143	rr_write(vrn, rr.word);
144	srlz_i();	144	srlz_i();
145	v = (vhpt_entry_t *) thash(page);	145	v = (vhpt_entry_t *) thash(page);
146	rr_write(vrn, rr_save.word);	146	rr_write(vrn, rr_save.word);
147	srlz_i();	147	srlz_i();
148	srlz_d();	148	srlz_d();
149		149
150	return v;	150	return v;
151	}	151	}
152		152
153	/** Compare ASID and VPN against PTE.	153	/** Compare ASID and VPN against PTE.
154	*	154	*
155	* Interrupts must be disabled.	155	* Interrupts must be disabled.
156	*	156	*
157	* @param page Address of virtual page including VRN bits.	157	* @param page Address of virtual page including VRN bits.
158	* @param asid Address space identifier.	158	* @param asid Address space identifier.
159	*	159	*
160	* @return True if page and asid match the page and asid of t, false otherwise.	160	* @return True if page and asid match the page and asid of t, false otherwise.
161	*/	161	*/
162	bool vhpt_compare(__address page, asid_t asid, vhpt_entry_t *v)	162	bool vhpt_compare(__address page, asid_t asid, vhpt_entry_t *v)
163	{	163	{
164	region_register rr_save, rr;	164	region_register rr_save, rr;
165	index_t vrn;	165	index_t vrn;
166	rid_t rid;	166	rid_t rid;
167	bool match;	167	bool match;
168		168
169	ASSERT(v);	169	ASSERT(v);
170		170
171	vrn = page >> VRN_SHIFT;	171	vrn = page >> VRN_SHIFT;
172	rid = ASID2RID(asid, vrn);	172	rid = ASID2RID(asid, vrn);
173		173
174	rr_save.word = rr_read(vrn);	174	rr_save.word = rr_read(vrn);
175	if (rr_save.map.rid == rid) {	175	if (rr_save.map.rid == rid) {
176	/*	176	/*
177	* The RID is already in place, compare ttag with t and return.	177	* The RID is already in place, compare ttag with t and return.
178	*/	178	*/
179	return ttag(page) == v->present.tag.tag_word;	179	return ttag(page) == v->present.tag.tag_word;
180	}	180	}
181		181
182	/*	182	/*
183	* The RID must be written to some region register.	183	* The RID must be written to some region register.
184	* To speed things up, register indexed by vrn is used.	184	* To speed things up, register indexed by vrn is used.
185	*/	185	*/
186	rr.word = rr_save.word;	186	rr.word = rr_save.word;
187	rr.map.rid = rid;	187	rr.map.rid = rid;
188	rr_write(vrn, rr.word);	188	rr_write(vrn, rr.word);
189	srlz_i();	189	srlz_i();
190	match = (ttag(page) == v->present.tag.tag_word);	190	match = (ttag(page) == v->present.tag.tag_word);
191	rr_write(vrn, rr_save.word);	191	rr_write(vrn, rr_save.word);
192	srlz_i();	192	srlz_i();
193	srlz_d();	193	srlz_d();
194		194
195	return match;	195	return match;
196	}	196	}
197		197
198	/** Set up one VHPT entry.	198	/** Set up one VHPT entry.
199	*	199	*
200	* @param t VHPT entry to be set up.	200	* @param t VHPT entry to be set up.
201	* @param page Virtual address of the page mapped by the entry.	201	* @param page Virtual address of the page mapped by the entry.
202	* @param asid Address space identifier of the address space to which page belongs.	202	* @param asid Address space identifier of the address space to which page belongs.
203	* @param frame Physical address of the frame to wich page is mapped.	203	* @param frame Physical address of the frame to wich page is mapped.
204	* @param flags Different flags for the mapping.	204	* @param flags Different flags for the mapping.
205	*/	205	*/
206	void vhpt_set_record(vhpt_entry_t *v, __address page, asid_t asid, __address frame, int flags)	206	void vhpt_set_record(vhpt_entry_t *v, __address page, asid_t asid, __address frame, int flags)
207	{	207	{
208	region_register rr_save, rr;	208	region_register rr_save, rr;
209	index_t vrn;	209	index_t vrn;
210	rid_t rid;	210	rid_t rid;
211	__u64 tag;	211	__u64 tag;
212		212
213	ASSERT(v);	213	ASSERT(v);
214		214
215	vrn = page >> VRN_SHIFT;	215	vrn = page >> VRN_SHIFT;
216	rid = ASID2RID(asid, vrn);	216	rid = ASID2RID(asid, vrn);
217		217
218	/*	218	/*
219	* Compute ttag.	219	* Compute ttag.
220	*/	220	*/
221	rr_save.word = rr_read(vrn);	221	rr_save.word = rr_read(vrn);
222	rr.word = rr_save.word;	222	rr.word = rr_save.word;
223	rr.map.rid = rid;	223	rr.map.rid = rid;
224	rr_write(vrn, rr.word);	224	rr_write(vrn, rr.word);
225	srlz_i();	225	srlz_i();
226	tag = ttag(page);	226	tag = ttag(page);
227	rr_write(vrn, rr_save.word);	227	rr_write(vrn, rr_save.word);
228	srlz_i();	228	srlz_i();
229	srlz_d();	229	srlz_d();
230		230
231	/*	231	/*
232	* Clear the entry.	232	* Clear the entry.
233	*/	233	*/
234	v->word[0] = 0;	234	v->word[0] = 0;
235	v->word[1] = 0;	235	v->word[1] = 0;
236	v->word[2] = 0;	236	v->word[2] = 0;
237	v->word[3] = 0;	237	v->word[3] = 0;
238		238
239	v->present.p = true;	239	v->present.p = true;
240	v->present.ma = (flags & PAGE_CACHEABLE) ? MA_WRITEBACK : MA_UNCACHEABLE;	240	v->present.ma = (flags & PAGE_CACHEABLE) ? MA_WRITEBACK : MA_UNCACHEABLE;
241	v->present.a = false; /* not accessed */	241	v->present.a = false; /* not accessed */
242	v->present.d = false; /* not dirty */	242	v->present.d = false; /* not dirty */
243	v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL;	243	v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL;
244	v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ;	244	v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ;
245	v->present.ar \|= (flags & PAGE_EXEC) ? AR_EXECUTE : 0;	245	v->present.ar \|= (flags & PAGE_EXEC) ? AR_EXECUTE : 0;
246	v->present.ppn = frame >> PPN_SHIFT;	246	v->present.ppn = frame >> PPN_SHIFT;
247	v->present.ed = false; /* exception not deffered */	247	v->present.ed = false; /* exception not deffered */
248	v->present.ps = PAGE_WIDTH;	248	v->present.ps = PAGE_WIDTH;
249	v->present.key = 0;	249	v->present.key = 0;
250	v->present.tag.tag_word = tag;	250	v->present.tag.tag_word = tag;
251	}	251	}
252		252

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia64/src/mm/page.c – Rev 869 → 879