1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
/*
* PS3 pagetable management routines.
*
* Copyright (C) 2006 Sony Computer Entertainment Inc.
* Copyright 2006, 2007 Sony Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <asm/machdep.h>
#include <asm/lmb.h>
#include <asm/udbg.h>
#include <asm/lv1call.h>
#include <asm/ps3fb.h>
#include "platform.h"
#if defined(DEBUG)
#define DBG udbg_printf
#else
#define DBG pr_debug
#endif
static struct hash_pte *htab;
static unsigned long htab_addr;
static unsigned char *bolttab;
static unsigned char *inusetab;
static DEFINE_SPINLOCK(ps3_bolttab_lock);
#define debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g) \
_debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g, __func__, __LINE__)
static void _debug_dump_hpte(unsigned long pa, unsigned long va,
unsigned long group, unsigned long bitmap, struct hash_pte lhpte,
int psize, unsigned long slot, const char* func, int line)
{
DBG("%s:%d: pa = %lxh\n", func, line, pa);
DBG("%s:%d: lpar = %lxh\n", func, line,
ps3_mm_phys_to_lpar(pa));
DBG("%s:%d: va = %lxh\n", func, line, va);
DBG("%s:%d: group = %lxh\n", func, line, group);
DBG("%s:%d: bitmap = %lxh\n", func, line, bitmap);
DBG("%s:%d: hpte.v = %lxh\n", func, line, lhpte.v);
DBG("%s:%d: hpte.r = %lxh\n", func, line, lhpte.r);
DBG("%s:%d: psize = %xh\n", func, line, psize);
DBG("%s:%d: slot = %lxh\n", func, line, slot);
}
static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va,
unsigned long pa, unsigned long rflags, unsigned long vflags,
int psize, int ssize)
{
unsigned long slot;
struct hash_pte lhpte;
int secondary = 0;
unsigned long result;
unsigned long bitmap;
unsigned long flags;
unsigned long p_pteg, s_pteg, b_index, b_mask, cb, ci;
vflags &= ~HPTE_V_SECONDARY; /* this bit is ignored */
lhpte.v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
vflags | HPTE_V_VALID;
lhpte.r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags;
p_pteg = hpte_group / HPTES_PER_GROUP;
s_pteg = ~p_pteg & htab_hash_mask;
spin_lock_irqsave(&ps3_bolttab_lock, flags);
BUG_ON(bolttab[p_pteg] == 0xff && bolttab[s_pteg] == 0xff);
bitmap = (inusetab[p_pteg] << 8) | inusetab[s_pteg];
if (bitmap == 0xffff) {
/*
* PTEG is full. Search for victim.
*/
bitmap &= ~((bolttab[p_pteg] << 8) | bolttab[s_pteg]);
do {
ci = mftb() & 15;
cb = 0x8000UL >> ci;
} while ((cb & bitmap) == 0);
} else {
/*
* search free slot in hardware order
* [primary] 0, 2, 4, 6, 1, 3, 5, 7
* [secondary] 0, 2, 4, 6, 1, 3, 5, 7
*/
for (ci = 0; ci < HPTES_PER_GROUP; ci += 2) {
cb = 0x8000UL >> ci;
if ((cb & bitmap) == 0)
goto found;
}
for (ci = 1; ci < HPTES_PER_GROUP; ci += 2) {
cb = 0x8000UL >> ci;
if ((cb & bitmap) == 0)
goto found;
}
for (ci = HPTES_PER_GROUP; ci < HPTES_PER_GROUP*2; ci += 2) {
cb = 0x8000UL >> ci;
if ((cb & bitmap) == 0)
goto found;
}
for (ci = HPTES_PER_GROUP+1; ci < HPTES_PER_GROUP*2; ci += 2) {
cb = 0x8000UL >> ci;
if ((cb & bitmap) == 0)
goto found;
}
}
found:
if (ci < HPTES_PER_GROUP) {
slot = p_pteg * HPTES_PER_GROUP + ci;
} else {
slot = s_pteg * HPTES_PER_GROUP + (ci & 7);
/* lhpte.dw0.dw0.h = 1; */
vflags |= HPTE_V_SECONDARY;
lhpte.v |= HPTE_V_SECONDARY;
}
result = lv1_write_htab_entry(0, slot, lhpte.v, lhpte.r);
if (result) {
debug_dump_hpte(pa, va, hpte_group, bitmap, lhpte, psize, slot);
BUG();
}
/*
* If used slot is not in primary HPTE group,
* the slot should be in secondary HPTE group.
*/
if ((hpte_group ^ slot) & ~(HPTES_PER_GROUP - 1)) {
secondary = 1;
b_index = s_pteg;
} else {
secondary = 0;
b_index = p_pteg;
}
b_mask = (lhpte.v & HPTE_V_BOLTED) ? 1 << 7 : 0 << 7;
bolttab[b_index] |= b_mask >> (slot & 7);
b_mask = 1 << 7;
inusetab[b_index] |= b_mask >> (slot & 7);
spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
return (slot & 7) | (secondary << 3);
}
static long ps3_hpte_remove(unsigned long hpte_group)
{
panic("ps3_hpte_remove() not implemented");
return 0;
}
static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp,
unsigned long va, int psize, int ssize, int local)
{
unsigned long flags;
unsigned long result;
unsigned long pteg, bit;
unsigned long hpte_v, want_v;
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
spin_lock_irqsave(&ps3_bolttab_lock, flags);
hpte_v = htab[slot].v;
if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) {
spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
/* ps3_hpte_insert() will be used to update PTE */
return -1;
}
result = lv1_write_htab_entry(0, slot, 0, 0);
if (result) {
DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
__func__, va, slot, psize, result, result);
BUG();
}
pteg = slot / HPTES_PER_GROUP;
bit = slot % HPTES_PER_GROUP;
inusetab[pteg] &= ~(0x80 >> bit);
spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
/* ps3_hpte_insert() will be used to update PTE */
return -1;
}
static void ps3_hpte_updateboltedpp(unsigned long newpp, unsigned long ea,
int psize, int ssize)
{
panic("ps3_hpte_updateboltedpp() not implemented");
}
static void ps3_hpte_invalidate(unsigned long slot, unsigned long va,
int psize, int ssize, int local)
{
unsigned long flags;
unsigned long result;
unsigned long pteg, bit;
spin_lock_irqsave(&ps3_bolttab_lock, flags);
result = lv1_write_htab_entry(0, slot, 0, 0);
if (result) {
DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
__func__, va, slot, psize, result, result);
BUG();
}
pteg = slot / HPTES_PER_GROUP;
bit = slot % HPTES_PER_GROUP;
inusetab[pteg] &= ~(0x80 >> bit);
spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
}
static void ps3_hpte_clear(void)
{
int result;
DBG(" -> %s:%d\n", __func__, __LINE__);
result = lv1_unmap_htab(htab_addr);
BUG_ON(result);
ps3_mm_shutdown();
ps3_mm_vas_destroy();
DBG(" <- %s:%d\n", __func__, __LINE__);
}
void __init ps3_hpte_init(unsigned long htab_size)
{
long bitmap_size;
DBG(" -> %s:%d\n", __func__, __LINE__);
ppc_md.hpte_invalidate = ps3_hpte_invalidate;
ppc_md.hpte_updatepp = ps3_hpte_updatepp;
ppc_md.hpte_updateboltedpp = ps3_hpte_updateboltedpp;
ppc_md.hpte_insert = ps3_hpte_insert;
ppc_md.hpte_remove = ps3_hpte_remove;
ppc_md.hpte_clear_all = ps3_hpte_clear;
ppc64_pft_size = __ilog2(htab_size);
bitmap_size = htab_size / sizeof(struct hash_pte) / 8;
bolttab = __va(lmb_alloc(bitmap_size, 1));
inusetab = __va(lmb_alloc(bitmap_size, 1));
memset(bolttab, 0, bitmap_size);
memset(inusetab, 0, bitmap_size);
DBG(" <- %s:%d\n", __func__, __LINE__);
}
void __init ps3_map_htab(void)
{
long result;
unsigned long htab_size = (1UL << ppc64_pft_size);
result = lv1_map_htab(0, &htab_addr);
htab = (__force struct hash_pte *)ioremap_flags(htab_addr, htab_size,
pgprot_val(PAGE_READONLY_X));
DBG("%s:%d: lpar %016lxh, virt %016lxh\n", __func__, __LINE__,
htab_addr, (unsigned long)htab);
}
|
