WebSVN – HelenOS – Diff – /trunk/kernel/arch/ppc64/src/mm/page.c


/*
 * Copyright (c) 2005 Martin Decky
 * 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 ppc64mm
 * @{
 */
/** @file
 */
 
#include <arch/mm/page.h>
#include <genarch/mm/page_pt.h>
#include <arch/mm/frame.h>
#include <arch/asm.h>
#include <mm/frame.h>
#include <mm/page.h>
#include <mm/as.h>
#include <arch.h>
#include <arch/types.h>
#include <arch/exception.h>
#include <align.h>
#include <config.h>
#include <print.h>
#include <symtab.h>
 
static phte_t *phte;
 
 
/** Try to find PTE for faulting address
 *
 * Try to find PTE for faulting address.
 * The as->lock must be held on entry to this function
 * if lock is true.
 *
 * @param as       Address space.
 * @param lock     Lock/unlock the address space.
 * @param badvaddr Faulting virtual address.
 * @param access   Access mode that caused the fault.
 * @param istate   Pointer to interrupted state.
 * @param pfrc     Pointer to variable where as_page_fault() return code will be stored.
 * @return         PTE on success, NULL otherwise.
 *
 */
static pte_t *find_mapping_and_check(as_t *as, bool lock, uintptr_t badvaddr, int access,
                     istate_t *istate, int *pfrc)
{
    /*
     * Check if the mapping exists in page tables.
     */
    pte_t *pte = page_mapping_find(as, badvaddr);
    if ((pte) && (pte->p)) {
        /*
         * Mapping found in page tables.
         * Immediately succeed.
         */
        return pte;
    } else {
        int rc;
   
        /*
         * Mapping not found in page tables.
         * Resort to higher-level page fault handler.
         */
        page_table_unlock(as, lock);
        switch (rc = as_page_fault(badvaddr, access, istate)) {
            case AS_PF_OK:
                /*
                 * The higher-level page fault handler succeeded,
                 * The mapping ought to be in place.
                 */
                page_table_lock(as, lock);
                pte = page_mapping_find(as, badvaddr);
                ASSERT((pte) && (pte->p));
                *pfrc = 0;
                return pte;
            case AS_PF_DEFER:
                page_table_lock(as, lock);
                *pfrc = rc;
                return NULL;
            case AS_PF_FAULT:
                page_table_lock(as, lock);
                *pfrc = rc;
                return NULL;
            default:
                panic("Unexpected rc (%d).", rc);
        }  
    }
}
 
 
static void pht_refill_fail(uintptr_t badvaddr, istate_t *istate)
{
    char *symbol = "";
    char *sym2 = "";
 
    char *s = get_symtab_entry(istate->pc);
    if (s)
        symbol = s;
    s = get_symtab_entry(istate->lr);
    if (s)
        sym2 = s;
    panic("%p: PHT Refill Exception at %p (%s<-%s).", badvaddr, istate->pc, symbol, sym2);
}
 
 
static void pht_insert(const uintptr_t vaddr, const pfn_t pfn)
{
    uint32_t page = (vaddr >> 12) & 0xffff;
    uint32_t api = (vaddr >> 22) & 0x3f;
    uint32_t vsid;
   
    asm volatile (
        "mfsrin %0, %1\n"
        : "=r" (vsid)
        : "r" (vaddr)
    );
   
    /* Primary hash (xor) */
    uint32_t h = 0;
    uint32_t hash = vsid ^ page;
    uint32_t base = (hash & 0x3ff) << 3;
    uint32_t i;
    bool found = false;
   
    /* Find unused or colliding
       PTE in PTEG */
    for (i = 0; i < 8; i++) {
        if ((!phte[base + i].v) || ((phte[base + i].vsid == vsid) && (phte[base + i].api == api))) {
            found = true;
            break;
        }
    }
   
    if (!found) {
        /* Secondary hash (not) */
        uint32_t base2 = (~hash & 0x3ff) << 3;
       
        /* Find unused or colliding
           PTE in PTEG */
        for (i = 0; i < 8; i++) {
            if ((!phte[base2 + i].v) || ((phte[base2 + i].vsid == vsid) && (phte[base2 + i].api == api))) {
                found = true;
                base = base2;
                h = 1;
                break;
            }
        }
       
        if (!found) {
            // TODO: A/C precedence groups
            i = page % 8;
        }
    }
   
    phte[base + i].v = 1;
    phte[base + i].vsid = vsid;
    phte[base + i].h = h;
    phte[base + i].api = api;
    phte[base + i].rpn = pfn;
    phte[base + i].r = 0;
    phte[base + i].c = 0;
    phte[base + i].pp = 2; // FIXME
}
 
 
/** Process Instruction/Data Storage Interrupt
 *
 * @param data   True if Data Storage Interrupt.
 * @param istate Interrupted register context.
 *
 */
void pht_refill(bool data, istate_t *istate)
{
    uintptr_t badvaddr;
    pte_t *pte;
    int pfrc;
    as_t *as;
    bool lock;
   
    if (AS == NULL) {
        as = AS_KERNEL;
        lock = false;
    } else {
        as = AS;
        lock = true;
    }
   
    if (data) {
        asm volatile (
            "mfdar %0\n"
            : "=r" (badvaddr)
        );
    } else
        badvaddr = istate->pc;
       
    page_table_lock(as, lock);
   
    pte = find_mapping_and_check(as, lock, badvaddr, PF_ACCESS_READ /* FIXME */, istate, &pfrc);
    if (!pte) {
        switch (pfrc) {
            case AS_PF_FAULT:
                goto fail;
                break;
            case AS_PF_DEFER:
                /*
                 * The page fault came during copy_from_uspace()
                 * or copy_to_uspace().
                 */
                page_table_unlock(as, lock);
                return;
            default:
                panic("Unexpected pfrc (%d).", pfrc);
        }
    }
   
    pte->a = 1; /* Record access to PTE */
    pht_insert(badvaddr, pte->pfn);
   
    page_table_unlock(as, lock);
    return;
   
fail:
    page_table_unlock(as, lock);
    pht_refill_fail(badvaddr, istate);
}
 
 
void pht_init(void)
{
    memsetb(phte, 1 << PHT_BITS, 0);
}
 
 
void page_arch_init(void)
{
    if (config.cpu_active == 1) {
        page_mapping_operations = &pt_mapping_operations;
       
        uintptr_t cur;
        int flags;
       
        for (cur = 128 << 20; cur < last_frame; cur += FRAME_SIZE) {
            flags = PAGE_CACHEABLE | PAGE_WRITE;
            if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
                flags |= PAGE_GLOBAL;
            page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
        }
       
        /* Allocate page hash table */
        phte_t *physical_phte = (phte_t *) frame_alloc(PHT_ORDER, FRAME_KA | FRAME_ATOMIC);
       
        ASSERT((uintptr_t) physical_phte % (1 << PHT_BITS) == 0);
        pht_init();
       
        asm volatile (
            "mtsdr1 %0\n"
            :
            : "r" ((uintptr_t) physical_phte)
        );
    }
}
 
 
uintptr_t hw_map(uintptr_t physaddr, size_t size)
{
    if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
        panic("Unable to map physical memory %p (%" PRIs " bytes).", physaddr, size)
   
    uintptr_t virtaddr = PA2KA(last_frame);
    pfn_t i;
    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE | PAGE_WRITE);
   
    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
   
    return virtaddr;
}
 
/** @}
 */
 

Rev 3587	Rev 3790
1	/*	1	/*
2	* Copyright (c) 2005 Martin Decky	2	* Copyright (c) 2005 Martin Decky
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 ppc64mm	29	/** @addtogroup ppc64mm
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <arch/mm/page.h>	35	#include <arch/mm/page.h>
36	#include <genarch/mm/page_pt.h>	36	#include <genarch/mm/page_pt.h>
37	#include <arch/mm/frame.h>	37	#include <arch/mm/frame.h>
38	#include <arch/asm.h>	38	#include <arch/asm.h>
39	#include <mm/frame.h>	39	#include <mm/frame.h>
40	#include <mm/page.h>	40	#include <mm/page.h>
41	#include <mm/as.h>	41	#include <mm/as.h>
42	#include <arch.h>	42	#include <arch.h>
43	#include <arch/types.h>	43	#include <arch/types.h>
44	#include <arch/exception.h>	44	#include <arch/exception.h>
45	#include <align.h>	45	#include <align.h>
46	#include <config.h>	46	#include <config.h>
47	#include <print.h>	47	#include <print.h>
48	#include <symtab.h>	48	#include <symtab.h>
49		49
50	static phte_t *phte;	50	static phte_t *phte;
51		51
52		52
53	/** Try to find PTE for faulting address	53	/** Try to find PTE for faulting address
54	*	54	*
55	* Try to find PTE for faulting address.	55	* Try to find PTE for faulting address.
56	* The as->lock must be held on entry to this function	56	* The as->lock must be held on entry to this function
57	* if lock is true.	57	* if lock is true.
58	*	58	*
59	* @param as Address space.	59	* @param as Address space.
60	* @param lock Lock/unlock the address space.	60	* @param lock Lock/unlock the address space.
61	* @param badvaddr Faulting virtual address.	61	* @param badvaddr Faulting virtual address.
62	* @param access Access mode that caused the fault.	62	* @param access Access mode that caused the fault.
63	* @param istate Pointer to interrupted state.	63	* @param istate Pointer to interrupted state.
64	* @param pfrc Pointer to variable where as_page_fault() return code will be stored.	64	* @param pfrc Pointer to variable where as_page_fault() return code will be stored.
65	* @return PTE on success, NULL otherwise.	65	* @return PTE on success, NULL otherwise.
66	*	66	*
67	*/	67	*/
68	static pte_t find_mapping_and_check(as_t as, bool lock, uintptr_t badvaddr, int access,	68	static pte_t find_mapping_and_check(as_t as, bool lock, uintptr_t badvaddr, int access,
69	istate_t istate, int pfrc)	69	istate_t istate, int pfrc)
70	{	70	{
71	/*	71	/*
72	* Check if the mapping exists in page tables.	72	* Check if the mapping exists in page tables.
73	*/	73	*/
74	pte_t *pte = page_mapping_find(as, badvaddr);	74	pte_t *pte = page_mapping_find(as, badvaddr);
75	if ((pte) && (pte->p)) {	75	if ((pte) && (pte->p)) {
76	/*	76	/*
77	* Mapping found in page tables.	77	* Mapping found in page tables.
78	* Immediately succeed.	78	* Immediately succeed.
79	*/	79	*/
80	return pte;	80	return pte;
81	} else {	81	} else {
82	int rc;	82	int rc;
83		83
84	/*	84	/*
85	* Mapping not found in page tables.	85	* Mapping not found in page tables.
86	* Resort to higher-level page fault handler.	86	* Resort to higher-level page fault handler.
87	*/	87	*/
88	page_table_unlock(as, lock);	88	page_table_unlock(as, lock);
89	switch (rc = as_page_fault(badvaddr, access, istate)) {	89	switch (rc = as_page_fault(badvaddr, access, istate)) {
90	case AS_PF_OK:	90	case AS_PF_OK:
91	/*	91	/*
92	* The higher-level page fault handler succeeded,	92	* The higher-level page fault handler succeeded,
93	* The mapping ought to be in place.	93	* The mapping ought to be in place.
94	*/	94	*/
95	page_table_lock(as, lock);	95	page_table_lock(as, lock);
96	pte = page_mapping_find(as, badvaddr);	96	pte = page_mapping_find(as, badvaddr);
97	ASSERT((pte) && (pte->p));	97	ASSERT((pte) && (pte->p));
98	*pfrc = 0;	98	*pfrc = 0;
99	return pte;	99	return pte;
100	case AS_PF_DEFER:	100	case AS_PF_DEFER:
101	page_table_lock(as, lock);	101	page_table_lock(as, lock);
102	*pfrc = rc;	102	*pfrc = rc;
103	return NULL;	103	return NULL;
104	case AS_PF_FAULT:	104	case AS_PF_FAULT:
105	page_table_lock(as, lock);	105	page_table_lock(as, lock);
106	*pfrc = rc;	106	*pfrc = rc;
107	return NULL;	107	return NULL;
108	default:	108	default:
109	panic("unexpected rc (%d)\n", rc);	109	panic("Unexpected rc (%d).", rc);
110	}	110	}
111	}	111	}
112	}	112	}
113		113
114		114
115	static void pht_refill_fail(uintptr_t badvaddr, istate_t *istate)	115	static void pht_refill_fail(uintptr_t badvaddr, istate_t *istate)
116	{	116	{
117	char *symbol = "";	117	char *symbol = "";
118	char *sym2 = "";	118	char *sym2 = "";
119		119
120	char *s = get_symtab_entry(istate->pc);	120	char *s = get_symtab_entry(istate->pc);
121	if (s)	121	if (s)
122	symbol = s;	122	symbol = s;
123	s = get_symtab_entry(istate->lr);	123	s = get_symtab_entry(istate->lr);
124	if (s)	124	if (s)
125	sym2 = s;	125	sym2 = s;
126	panic("%p: PHT Refill Exception at %p (%s<-%s)\n", badvaddr, istate->pc, symbol, sym2);	126	panic("%p: PHT Refill Exception at %p (%s<-%s).", badvaddr, istate->pc, symbol, sym2);
127	}	127	}
128		128
129		129
130	static void pht_insert(const uintptr_t vaddr, const pfn_t pfn)	130	static void pht_insert(const uintptr_t vaddr, const pfn_t pfn)
131	{	131	{
132	uint32_t page = (vaddr >> 12) & 0xffff;	132	uint32_t page = (vaddr >> 12) & 0xffff;
133	uint32_t api = (vaddr >> 22) & 0x3f;	133	uint32_t api = (vaddr >> 22) & 0x3f;
134	uint32_t vsid;	134	uint32_t vsid;
135		135
136	asm volatile (	136	asm volatile (
137	"mfsrin %0, %1\n"	137	"mfsrin %0, %1\n"
138	: "=r" (vsid)	138	: "=r" (vsid)
139	: "r" (vaddr)	139	: "r" (vaddr)
140	);	140	);
141		141
142	/* Primary hash (xor) */	142	/* Primary hash (xor) */
143	uint32_t h = 0;	143	uint32_t h = 0;
144	uint32_t hash = vsid ^ page;	144	uint32_t hash = vsid ^ page;
145	uint32_t base = (hash & 0x3ff) << 3;	145	uint32_t base = (hash & 0x3ff) << 3;
146	uint32_t i;	146	uint32_t i;
147	bool found = false;	147	bool found = false;
148		148
149	/* Find unused or colliding	149	/* Find unused or colliding
150	PTE in PTEG */	150	PTE in PTEG */
151	for (i = 0; i < 8; i++) {	151	for (i = 0; i < 8; i++) {
152	if ((!phte[base + i].v) \|\| ((phte[base + i].vsid == vsid) && (phte[base + i].api == api))) {	152	if ((!phte[base + i].v) \|\| ((phte[base + i].vsid == vsid) && (phte[base + i].api == api))) {
153	found = true;	153	found = true;
154	break;	154	break;
155	}	155	}
156	}	156	}
157		157
158	if (!found) {	158	if (!found) {
159	/* Secondary hash (not) */	159	/* Secondary hash (not) */
160	uint32_t base2 = (~hash & 0x3ff) << 3;	160	uint32_t base2 = (~hash & 0x3ff) << 3;
161		161
162	/* Find unused or colliding	162	/* Find unused or colliding
163	PTE in PTEG */	163	PTE in PTEG */
164	for (i = 0; i < 8; i++) {	164	for (i = 0; i < 8; i++) {
165	if ((!phte[base2 + i].v) \|\| ((phte[base2 + i].vsid == vsid) && (phte[base2 + i].api == api))) {	165	if ((!phte[base2 + i].v) \|\| ((phte[base2 + i].vsid == vsid) && (phte[base2 + i].api == api))) {
166	found = true;	166	found = true;
167	base = base2;	167	base = base2;
168	h = 1;	168	h = 1;
169	break;	169	break;
170	}	170	}
171	}	171	}
172		172
173	if (!found) {	173	if (!found) {
174	// TODO: A/C precedence groups	174	// TODO: A/C precedence groups
175	i = page % 8;	175	i = page % 8;
176	}	176	}
177	}	177	}
178		178
179	phte[base + i].v = 1;	179	phte[base + i].v = 1;
180	phte[base + i].vsid = vsid;	180	phte[base + i].vsid = vsid;
181	phte[base + i].h = h;	181	phte[base + i].h = h;
182	phte[base + i].api = api;	182	phte[base + i].api = api;
183	phte[base + i].rpn = pfn;	183	phte[base + i].rpn = pfn;
184	phte[base + i].r = 0;	184	phte[base + i].r = 0;
185	phte[base + i].c = 0;	185	phte[base + i].c = 0;
186	phte[base + i].pp = 2; // FIXME	186	phte[base + i].pp = 2; // FIXME
187	}	187	}
188		188
189		189
190	/** Process Instruction/Data Storage Interrupt	190	/** Process Instruction/Data Storage Interrupt
191	*	191	*
192	* @param data True if Data Storage Interrupt.	192	* @param data True if Data Storage Interrupt.
193	* @param istate Interrupted register context.	193	* @param istate Interrupted register context.
194	*	194	*
195	*/	195	*/
196	void pht_refill(bool data, istate_t *istate)	196	void pht_refill(bool data, istate_t *istate)
197	{	197	{
198	uintptr_t badvaddr;	198	uintptr_t badvaddr;
199	pte_t *pte;	199	pte_t *pte;
200	int pfrc;	200	int pfrc;
201	as_t *as;	201	as_t *as;
202	bool lock;	202	bool lock;
203		203
204	if (AS == NULL) {	204	if (AS == NULL) {
205	as = AS_KERNEL;	205	as = AS_KERNEL;
206	lock = false;	206	lock = false;
207	} else {	207	} else {
208	as = AS;	208	as = AS;
209	lock = true;	209	lock = true;
210	}	210	}
211		211
212	if (data) {	212	if (data) {
213	asm volatile (	213	asm volatile (
214	"mfdar %0\n"	214	"mfdar %0\n"
215	: "=r" (badvaddr)	215	: "=r" (badvaddr)
216	);	216	);
217	} else	217	} else
218	badvaddr = istate->pc;	218	badvaddr = istate->pc;
219		219
220	page_table_lock(as, lock);	220	page_table_lock(as, lock);
221		221
222	pte = find_mapping_and_check(as, lock, badvaddr, PF_ACCESS_READ /* FIXME */, istate, &pfrc);	222	pte = find_mapping_and_check(as, lock, badvaddr, PF_ACCESS_READ /* FIXME */, istate, &pfrc);
223	if (!pte) {	223	if (!pte) {
224	switch (pfrc) {	224	switch (pfrc) {
225	case AS_PF_FAULT:	225	case AS_PF_FAULT:
226	goto fail;	226	goto fail;
227	break;	227	break;
228	case AS_PF_DEFER:	228	case AS_PF_DEFER:
229	/*	229	/*
230	* The page fault came during copy_from_uspace()	230	* The page fault came during copy_from_uspace()
231	* or copy_to_uspace().	231	* or copy_to_uspace().
232	*/	232	*/
233	page_table_unlock(as, lock);	233	page_table_unlock(as, lock);
234	return;	234	return;
235	default:	235	default:
236	panic("Unexpected pfrc (%d)\n", pfrc);	236	panic("Unexpected pfrc (%d).", pfrc);
237	}	237	}
238	}	238	}
239		239
240	pte->a = 1; /* Record access to PTE */	240	pte->a = 1; /* Record access to PTE */
241	pht_insert(badvaddr, pte->pfn);	241	pht_insert(badvaddr, pte->pfn);
242		242
243	page_table_unlock(as, lock);	243	page_table_unlock(as, lock);
244	return;	244	return;
245		245
246	fail:	246	fail:
247	page_table_unlock(as, lock);	247	page_table_unlock(as, lock);
248	pht_refill_fail(badvaddr, istate);	248	pht_refill_fail(badvaddr, istate);
249	}	249	}
250		250
251		251
252	void pht_init(void)	252	void pht_init(void)
253	{	253	{
254	memsetb(phte, 1 << PHT_BITS, 0);	254	memsetb(phte, 1 << PHT_BITS, 0);
255	}	255	}
256		256
257		257
258	void page_arch_init(void)	258	void page_arch_init(void)
259	{	259	{
260	if (config.cpu_active == 1) {	260	if (config.cpu_active == 1) {
261	page_mapping_operations = &pt_mapping_operations;	261	page_mapping_operations = &pt_mapping_operations;
262		262
263	uintptr_t cur;	263	uintptr_t cur;
264	int flags;	264	int flags;
265		265
266	for (cur = 128 << 20; cur < last_frame; cur += FRAME_SIZE) {	266	for (cur = 128 << 20; cur < last_frame; cur += FRAME_SIZE) {
267	flags = PAGE_CACHEABLE \| PAGE_WRITE;	267	flags = PAGE_CACHEABLE \| PAGE_WRITE;
268	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))	268	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
269	flags \|= PAGE_GLOBAL;	269	flags \|= PAGE_GLOBAL;
270	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);	270	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
271	}	271	}
272		272
273	/* Allocate page hash table */	273	/* Allocate page hash table */
274	phte_t physical_phte = (phte_t ) frame_alloc(PHT_ORDER, FRAME_KA \| FRAME_ATOMIC);	274	phte_t physical_phte = (phte_t ) frame_alloc(PHT_ORDER, FRAME_KA \| FRAME_ATOMIC);
275		275
276	ASSERT((uintptr_t) physical_phte % (1 << PHT_BITS) == 0);	276	ASSERT((uintptr_t) physical_phte % (1 << PHT_BITS) == 0);
277	pht_init();	277	pht_init();
278		278
279	asm volatile (	279	asm volatile (
280	"mtsdr1 %0\n"	280	"mtsdr1 %0\n"
281	:	281	:
282	: "r" ((uintptr_t) physical_phte)	282	: "r" ((uintptr_t) physical_phte)
283	);	283	);
284	}	284	}
285	}	285	}
286		286
287		287
288	uintptr_t hw_map(uintptr_t physaddr, size_t size)	288	uintptr_t hw_map(uintptr_t physaddr, size_t size)
289	{	289	{
290	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))	290	if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
291	panic("Unable to map physical memory %p (%" PRIs " bytes)", physaddr, size)	291	panic("Unable to map physical memory %p (%" PRIs " bytes).", physaddr, size)
292		292
293	uintptr_t virtaddr = PA2KA(last_frame);	293	uintptr_t virtaddr = PA2KA(last_frame);
294	pfn_t i;	294	pfn_t i;
295	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)	295	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
296	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE \| PAGE_WRITE);	296	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE \| PAGE_WRITE);
297		297
298	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);	298	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
299		299
300	return virtaddr;	300	return virtaddr;
301	}	301	}
302		302
303	/** @}	303	/** @}
304	*/	304	*/
305		305

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ppc64/src/mm/page.c – Rev 3587 → 3790