WebSVN – HelenOS – Diff – /trunk/kernel/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.
 */
 
/** @addtogroup ia64mm 
 * @{
 */
/** @file
 */
 
#include <arch/mm/page.h>
#include <genarch/mm/page_ht.h>
#include <mm/asid.h>
#include <arch/mm/asid.h>
#include <arch/mm/vhpt.h>
#include <arch/types.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>
#include <align.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;
#ifdef CONFIG_VHPT  
    uintptr_t vhpt_base;
#endif
 
    /*
     * First set up kernel region register.
     * This is redundant (see start.S) but we keep it here just for sure.
     */
    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 setup 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 = RID_KERNEL;
        rr.map.ps = PAGE_WIDTH;
        rr_write(i, rr.word);
        srlz_i();
        srlz_d();
    }
 
#ifdef CONFIG_VHPT  
    vhpt_base = vhpt_set_up();
#endif
    /*
     * Set up PTA register.
     */
    pta.word = pta_read();
#ifndef CONFIG_VHPT
    pta.map.ve = 0;                   /* disable VHPT walker */
    pta.map.base = 0 >> PTA_BASE_SHIFT;
#else
    pta.map.ve = 1;                   /* enable VHPT walker */
    pta.map.base = vhpt_base >> PTA_BASE_SHIFT;
#endif
    pta.map.vf = 1;                   /* large entry format */
    pta.map.size = VHPT_WIDTH;
    pta_write(pta.word);
    srlz_i();
    srlz_d();
}
 
/** 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(uintptr_t 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(uintptr_t 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 v 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, uintptr_t page, asid_t asid, uintptr_t frame,
    int flags)
{
    region_register rr_save, rr;   
    index_t vrn;
    rid_t rid;
    uint64_t 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;
}
 
uintptr_t hw_map(uintptr_t physaddr, size_t size __attribute__ ((unused)))
{
    /* This is a dirty hack. */
    return PA2KA(physaddr);
}
 
void hw_area(uintptr_t *physaddr, pfn_t *frames)
{
    *physaddr = end_frame;
    *frames = ADDR2PFN(0x7fffffffffffffffUL - end_frame);
}
 
/** @}
 */
 

Rev 3777	Rev 3908
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	/** @addtogroup ia64mm	30	/** @addtogroup ia64mm
31	* @{	31	* @{
32	*/	32	*/
33	/** @file	33	/** @file
34	*/	34	*/
35		35
36	#include <arch/mm/page.h>	36	#include <arch/mm/page.h>
37	#include <genarch/mm/page_ht.h>	37	#include <genarch/mm/page_ht.h>
38	#include <mm/asid.h>	38	#include <mm/asid.h>
39	#include <arch/mm/asid.h>	39	#include <arch/mm/asid.h>
40	#include <arch/mm/vhpt.h>	40	#include <arch/mm/vhpt.h>
41	#include <arch/types.h>	41	#include <arch/types.h>
42	#include <print.h>	42	#include <print.h>
43	#include <mm/page.h>	43	#include <mm/page.h>
44	#include <mm/frame.h>	44	#include <mm/frame.h>
45	#include <config.h>	45	#include <config.h>
46	#include <panic.h>	46	#include <panic.h>
47	#include <arch/asm.h>	47	#include <arch/asm.h>
48	#include <arch/barrier.h>	48	#include <arch/barrier.h>
49	#include <memstr.h>	49	#include <memstr.h>
50	#include <align.h>	50	#include <align.h>
51		51
52	static void set_environment(void);	52	static void set_environment(void);
53		53
54	/** Initialize ia64 virtual address translation subsystem. */	54	/** Initialize ia64 virtual address translation subsystem. */
55	void page_arch_init(void)	55	void page_arch_init(void)
56	{	56	{
57	page_mapping_operations = &ht_mapping_operations;	57	page_mapping_operations = &ht_mapping_operations;
58	pk_disable();	58	pk_disable();
59	set_environment();	59	set_environment();
60	}	60	}
61		61
62	/** Initialize VHPT and region registers. */	62	/** Initialize VHPT and region registers. */
63	void set_environment(void)	63	void set_environment(void)
64	{	64	{
65	region_register rr;	65	region_register rr;
66	pta_register pta;	66	pta_register pta;
67	int i;	67	int i;
68	#ifdef CONFIG_VHPT	68	#ifdef CONFIG_VHPT
69	uintptr_t vhpt_base;	69	uintptr_t vhpt_base;
70	#endif	70	#endif
71		71
72	/*	72	/*
73	* First set up kernel region register.	73	* First set up kernel region register.
74	* This is redundant (see start.S) but we keep it here just for sure.	74	* This is redundant (see start.S) but we keep it here just for sure.
75	*/	75	*/
76	rr.word = rr_read(VRN_KERNEL);	76	rr.word = rr_read(VRN_KERNEL);
77	rr.map.ve = 0; /* disable VHPT walker */	77	rr.map.ve = 0; /* disable VHPT walker */
78	rr.map.ps = PAGE_WIDTH;	78	rr.map.ps = PAGE_WIDTH;
79	rr.map.rid = ASID2RID(ASID_KERNEL, VRN_KERNEL);	79	rr.map.rid = ASID2RID(ASID_KERNEL, VRN_KERNEL);
80	rr_write(VRN_KERNEL, rr.word);	80	rr_write(VRN_KERNEL, rr.word);
81	srlz_i();	81	srlz_i();
82	srlz_d();	82	srlz_d();
83		83
84	/*	84	/*
85	* And setup the rest of region register.	85	* And setup the rest of region register.
86	*/	86	*/
87	for(i = 0; i < REGION_REGISTERS; i++) {	87	for(i = 0; i < REGION_REGISTERS; i++) {
88	/* skip kernel rr */	88	/* skip kernel rr */
89	if (i == VRN_KERNEL)	89	if (i == VRN_KERNEL)
90	continue;	90	continue;
91		91
92	rr.word = rr_read(i);	92	rr.word = rr_read(i);
93	rr.map.ve = 0; /* disable VHPT walker */	93	rr.map.ve = 0; /* disable VHPT walker */
94	rr.map.rid = RID_KERNEL;	94	rr.map.rid = RID_KERNEL;
95	rr.map.ps = PAGE_WIDTH;	95	rr.map.ps = PAGE_WIDTH;
96	rr_write(i, rr.word);	96	rr_write(i, rr.word);
97	srlz_i();	97	srlz_i();
98	srlz_d();	98	srlz_d();
99	}	99	}
100		100
101	#ifdef CONFIG_VHPT	101	#ifdef CONFIG_VHPT
102	vhpt_base = vhpt_set_up();	102	vhpt_base = vhpt_set_up();
103	#endif	103	#endif
104	/*	104	/*
105	* Set up PTA register.	105	* Set up PTA register.
106	*/	106	*/
107	pta.word = pta_read();	107	pta.word = pta_read();
108	#ifndef CONFIG_VHPT	108	#ifndef CONFIG_VHPT
109	pta.map.ve = 0; /* disable VHPT walker */	109	pta.map.ve = 0; /* disable VHPT walker */
110	pta.map.base = 0 >> PTA_BASE_SHIFT;	110	pta.map.base = 0 >> PTA_BASE_SHIFT;
111	#else	111	#else
112	pta.map.ve = 1; /* enable VHPT walker */	112	pta.map.ve = 1; /* enable VHPT walker */
113	pta.map.base = vhpt_base >> PTA_BASE_SHIFT;	113	pta.map.base = vhpt_base >> PTA_BASE_SHIFT;
114	#endif	114	#endif
115	pta.map.vf = 1; /* large entry format */	115	pta.map.vf = 1; /* large entry format */
116	pta.map.size = VHPT_WIDTH;	116	pta.map.size = VHPT_WIDTH;
117	pta_write(pta.word);	117	pta_write(pta.word);
118	srlz_i();	118	srlz_i();
119	srlz_d();	119	srlz_d();
120	}	120	}
121		121
122	/** Calculate address of collision chain from VPN and ASID.	122	/** Calculate address of collision chain from VPN and ASID.
123	*	123	*
124	* Interrupts must be disabled.	124	* Interrupts must be disabled.
125	*	125	*
126	* @param page Address of virtual page including VRN bits.	126	* @param page Address of virtual page including VRN bits.
127	* @param asid Address space identifier.	127	* @param asid Address space identifier.
128	*	128	*
129	* @return VHPT entry address.	129	* @return VHPT entry address.
130	*/	130	*/
131	vhpt_entry_t *vhpt_hash(uintptr_t page, asid_t asid)	131	vhpt_entry_t *vhpt_hash(uintptr_t page, asid_t asid)
132	{	132	{
133	region_register rr_save, rr;	133	region_register rr_save, rr;
134	index_t vrn;	134	index_t vrn;
135	rid_t rid;	135	rid_t rid;
136	vhpt_entry_t *v;	136	vhpt_entry_t *v;
137		137
138	vrn = page >> VRN_SHIFT;	138	vrn = page >> VRN_SHIFT;
139	rid = ASID2RID(asid, vrn);	139	rid = ASID2RID(asid, vrn);
140		140
141	rr_save.word = rr_read(vrn);	141	rr_save.word = rr_read(vrn);
142	if (rr_save.map.rid == rid) {	142	if (rr_save.map.rid == rid) {
143	/*	143	/*
144	* The RID is already in place, compute thash and return.	144	* The RID is already in place, compute thash and return.
145	*/	145	*/
146	v = (vhpt_entry_t *) thash(page);	146	v = (vhpt_entry_t *) thash(page);
147	return v;	147	return v;
148	}	148	}
149		149
150	/*	150	/*
151	* The RID must be written to some region register.	151	* The RID must be written to some region register.
152	* To speed things up, register indexed by vrn is used.	152	* To speed things up, register indexed by vrn is used.
153	*/	153	*/
154	rr.word = rr_save.word;	154	rr.word = rr_save.word;
155	rr.map.rid = rid;	155	rr.map.rid = rid;
156	rr_write(vrn, rr.word);	156	rr_write(vrn, rr.word);
157	srlz_i();	157	srlz_i();
158	v = (vhpt_entry_t *) thash(page);	158	v = (vhpt_entry_t *) thash(page);
159	rr_write(vrn, rr_save.word);	159	rr_write(vrn, rr_save.word);
160	srlz_i();	160	srlz_i();
161	srlz_d();	161	srlz_d();
162		162
163	return v;	163	return v;
164	}	164	}
165		165
166	/** Compare ASID and VPN against PTE.	166	/** Compare ASID and VPN against PTE.
167	*	167	*
168	* Interrupts must be disabled.	168	* Interrupts must be disabled.
169	*	169	*
170	* @param page Address of virtual page including VRN bits.	170	* @param page Address of virtual page including VRN bits.
171	* @param asid Address space identifier.	171	* @param asid Address space identifier.
172	*	172	*
173	* @return True if page and asid match the page and asid of t,	173	* @return True if page and asid match the page and asid of t,
174	* false otherwise.	174	* false otherwise.
175	*/	175	*/
176	bool vhpt_compare(uintptr_t page, asid_t asid, vhpt_entry_t *v)	176	bool vhpt_compare(uintptr_t page, asid_t asid, vhpt_entry_t *v)
177	{	177	{
178	region_register rr_save, rr;	178	region_register rr_save, rr;
179	index_t vrn;	179	index_t vrn;
180	rid_t rid;	180	rid_t rid;
181	bool match;	181	bool match;
182		182
183	ASSERT(v);	183	ASSERT(v);
184		184
185	vrn = page >> VRN_SHIFT;	185	vrn = page >> VRN_SHIFT;
186	rid = ASID2RID(asid, vrn);	186	rid = ASID2RID(asid, vrn);
187		187
188	rr_save.word = rr_read(vrn);	188	rr_save.word = rr_read(vrn);
189	if (rr_save.map.rid == rid) {	189	if (rr_save.map.rid == rid) {
190	/*	190	/*
191	* The RID is already in place, compare ttag with t and return.	191	* The RID is already in place, compare ttag with t and return.
192	*/	192	*/
193	return ttag(page) == v->present.tag.tag_word;	193	return ttag(page) == v->present.tag.tag_word;
194	}	194	}
195		195
196	/*	196	/*
197	* The RID must be written to some region register.	197	* The RID must be written to some region register.
198	* To speed things up, register indexed by vrn is used.	198	* To speed things up, register indexed by vrn is used.
199	*/	199	*/
200	rr.word = rr_save.word;	200	rr.word = rr_save.word;
201	rr.map.rid = rid;	201	rr.map.rid = rid;
202	rr_write(vrn, rr.word);	202	rr_write(vrn, rr.word);
203	srlz_i();	203	srlz_i();
204	match = (ttag(page) == v->present.tag.tag_word);	204	match = (ttag(page) == v->present.tag.tag_word);
205	rr_write(vrn, rr_save.word);	205	rr_write(vrn, rr_save.word);
206	srlz_i();	206	srlz_i();
207	srlz_d();	207	srlz_d();
208		208
209	return match;	209	return match;
210	}	210	}
211		211
212	/** Set up one VHPT entry.	212	/** Set up one VHPT entry.
213	*	213	*
214	* @param v VHPT entry to be set up.	214	* @param v VHPT entry to be set up.
215	* @param page Virtual address of the page mapped by the entry.	215	* @param page Virtual address of the page mapped by the entry.
216	* @param asid Address space identifier of the address space to which	216	* @param asid Address space identifier of the address space to which
217	* page belongs.	217	* page belongs.
218	* @param frame Physical address of the frame to wich page is mapped.	218	* @param frame Physical address of the frame to wich page is mapped.
219	* @param flags Different flags for the mapping.	219	* @param flags Different flags for the mapping.
220	*/	220	*/
221	void	221	void
222	vhpt_set_record(vhpt_entry_t *v, uintptr_t page, asid_t asid, uintptr_t frame,	222	vhpt_set_record(vhpt_entry_t *v, uintptr_t page, asid_t asid, uintptr_t frame,
223	int flags)	223	int flags)
224	{	224	{
225	region_register rr_save, rr;	225	region_register rr_save, rr;
226	index_t vrn;	226	index_t vrn;
227	rid_t rid;	227	rid_t rid;
228	uint64_t tag;	228	uint64_t tag;
229		229
230	ASSERT(v);	230	ASSERT(v);
231		231
232	vrn = page >> VRN_SHIFT;	232	vrn = page >> VRN_SHIFT;
233	rid = ASID2RID(asid, vrn);	233	rid = ASID2RID(asid, vrn);
234		234
235	/*	235	/*
236	* Compute ttag.	236	* Compute ttag.
237	*/	237	*/
238	rr_save.word = rr_read(vrn);	238	rr_save.word = rr_read(vrn);
239	rr.word = rr_save.word;	239	rr.word = rr_save.word;
240	rr.map.rid = rid;	240	rr.map.rid = rid;
241	rr_write(vrn, rr.word);	241	rr_write(vrn, rr.word);
242	srlz_i();	242	srlz_i();
243	tag = ttag(page);	243	tag = ttag(page);
244	rr_write(vrn, rr_save.word);	244	rr_write(vrn, rr_save.word);
245	srlz_i();	245	srlz_i();
246	srlz_d();	246	srlz_d();
247		247
248	/*	248	/*
249	* Clear the entry.	249	* Clear the entry.
250	*/	250	*/
251	v->word[0] = 0;	251	v->word[0] = 0;
252	v->word[1] = 0;	252	v->word[1] = 0;
253	v->word[2] = 0;	253	v->word[2] = 0;
254	v->word[3] = 0;	254	v->word[3] = 0;
255		255
256	v->present.p = true;	256	v->present.p = true;
257	v->present.ma = (flags & PAGE_CACHEABLE) ?	257	v->present.ma = (flags & PAGE_CACHEABLE) ?
258	MA_WRITEBACK : MA_UNCACHEABLE;	258	MA_WRITEBACK : MA_UNCACHEABLE;
259	v->present.a = false; /* not accessed */	259	v->present.a = false; /* not accessed */
260	v->present.d = false; /* not dirty */	260	v->present.d = false; /* not dirty */
261	v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL;	261	v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL;
262	v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ;	262	v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ;
263	v->present.ar \|= (flags & PAGE_EXEC) ? AR_EXECUTE : 0;	263	v->present.ar \|= (flags & PAGE_EXEC) ? AR_EXECUTE : 0;
264	v->present.ppn = frame >> PPN_SHIFT;	264	v->present.ppn = frame >> PPN_SHIFT;
265	v->present.ed = false; /* exception not deffered */	265	v->present.ed = false; /* exception not deffered */
266	v->present.ps = PAGE_WIDTH;	266	v->present.ps = PAGE_WIDTH;
267	v->present.key = 0;	267	v->present.key = 0;
268	v->present.tag.tag_word = tag;	268	v->present.tag.tag_word = tag;
269	}	269	}
270		270
271	uintptr_t hw_map(uintptr_t physaddr, size_t size __attribute__ ((unused)))	271	uintptr_t hw_map(uintptr_t physaddr, size_t size __attribute__ ((unused)))
272	{	272	{
273	/* This is a dirty hack. */	273	/* This is a dirty hack. */
274	return PA2KA(physaddr);	274	return PA2KA(physaddr);
275	}	275	}
276		276
-		277	void hw_area(uintptr_t physaddr, pfn_t frames)
-		278	{
-		279	*physaddr = end_frame;
-		280	*frames = ADDR2PFN(0x7fffffffffffffffUL - end_frame);
-		281	}
-		282
277	/** @}	283	/** @}
278	*/	284	*/
279		285

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia64/src/mm/page.c – Rev 3777 → 3908