2 * PS3 pagetable management routines.
4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006, 2007 Sony Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/kernel.h>
22 #include <linux/lmb.h>
24 #include <asm/machdep.h>
27 #include <asm/lv1call.h>
28 #include <asm/ps3fb.h>
33 #define DBG udbg_printf
38 static struct hash_pte *htab;
39 static unsigned long htab_addr;
40 static unsigned char *bolttab;
41 static unsigned char *inusetab;
43 static DEFINE_SPINLOCK(ps3_bolttab_lock);
45 #define debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g) \
46 _debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g, __func__, __LINE__)
47 static void _debug_dump_hpte(unsigned long pa, unsigned long va,
48 unsigned long group, unsigned long bitmap, struct hash_pte lhpte,
49 int psize, unsigned long slot, const char* func, int line)
51 DBG("%s:%d: pa = %lxh\n", func, line, pa);
52 DBG("%s:%d: lpar = %lxh\n", func, line,
53 ps3_mm_phys_to_lpar(pa));
54 DBG("%s:%d: va = %lxh\n", func, line, va);
55 DBG("%s:%d: group = %lxh\n", func, line, group);
56 DBG("%s:%d: bitmap = %lxh\n", func, line, bitmap);
57 DBG("%s:%d: hpte.v = %lxh\n", func, line, lhpte.v);
58 DBG("%s:%d: hpte.r = %lxh\n", func, line, lhpte.r);
59 DBG("%s:%d: psize = %xh\n", func, line, psize);
60 DBG("%s:%d: slot = %lxh\n", func, line, slot);
63 static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va,
64 unsigned long pa, unsigned long rflags, unsigned long vflags,
68 struct hash_pte lhpte;
73 unsigned long p_pteg, s_pteg, b_index, b_mask, cb, ci;
75 vflags &= ~HPTE_V_SECONDARY; /* this bit is ignored */
77 lhpte.v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
78 vflags | HPTE_V_VALID;
79 lhpte.r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags;
81 p_pteg = hpte_group / HPTES_PER_GROUP;
82 s_pteg = ~p_pteg & htab_hash_mask;
84 spin_lock_irqsave(&ps3_bolttab_lock, flags);
86 BUG_ON(bolttab[p_pteg] == 0xff && bolttab[s_pteg] == 0xff);
88 bitmap = (inusetab[p_pteg] << 8) | inusetab[s_pteg];
90 if (bitmap == 0xffff) {
92 * PTEG is full. Search for victim.
94 bitmap &= ~((bolttab[p_pteg] << 8) | bolttab[s_pteg]);
98 } while ((cb & bitmap) == 0);
101 * search free slot in hardware order
102 * [primary] 0, 2, 4, 6, 1, 3, 5, 7
103 * [secondary] 0, 2, 4, 6, 1, 3, 5, 7
105 for (ci = 0; ci < HPTES_PER_GROUP; ci += 2) {
107 if ((cb & bitmap) == 0)
110 for (ci = 1; ci < HPTES_PER_GROUP; ci += 2) {
112 if ((cb & bitmap) == 0)
115 for (ci = HPTES_PER_GROUP; ci < HPTES_PER_GROUP*2; ci += 2) {
117 if ((cb & bitmap) == 0)
120 for (ci = HPTES_PER_GROUP+1; ci < HPTES_PER_GROUP*2; ci += 2) {
122 if ((cb & bitmap) == 0)
128 if (ci < HPTES_PER_GROUP) {
129 slot = p_pteg * HPTES_PER_GROUP + ci;
131 slot = s_pteg * HPTES_PER_GROUP + (ci & 7);
132 /* lhpte.dw0.dw0.h = 1; */
133 vflags |= HPTE_V_SECONDARY;
134 lhpte.v |= HPTE_V_SECONDARY;
137 result = lv1_write_htab_entry(0, slot, lhpte.v, lhpte.r);
140 debug_dump_hpte(pa, va, hpte_group, bitmap, lhpte, psize, slot);
145 * If used slot is not in primary HPTE group,
146 * the slot should be in secondary HPTE group.
149 if ((hpte_group ^ slot) & ~(HPTES_PER_GROUP - 1)) {
157 b_mask = (lhpte.v & HPTE_V_BOLTED) ? 1 << 7 : 0 << 7;
158 bolttab[b_index] |= b_mask >> (slot & 7);
160 inusetab[b_index] |= b_mask >> (slot & 7);
161 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
163 return (slot & 7) | (secondary << 3);
166 static long ps3_hpte_remove(unsigned long hpte_group)
168 panic("ps3_hpte_remove() not implemented");
172 static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp,
173 unsigned long va, int psize, int ssize, int local)
176 unsigned long result;
177 unsigned long pteg, bit;
178 unsigned long hpte_v, want_v;
180 want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
182 spin_lock_irqsave(&ps3_bolttab_lock, flags);
184 hpte_v = htab[slot].v;
185 if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) {
186 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
188 /* ps3_hpte_insert() will be used to update PTE */
192 result = lv1_write_htab_entry(0, slot, 0, 0);
195 DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
196 __func__, va, slot, psize, result, result);
200 pteg = slot / HPTES_PER_GROUP;
201 bit = slot % HPTES_PER_GROUP;
202 inusetab[pteg] &= ~(0x80 >> bit);
204 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
206 /* ps3_hpte_insert() will be used to update PTE */
210 static void ps3_hpte_updateboltedpp(unsigned long newpp, unsigned long ea,
211 int psize, int ssize)
213 panic("ps3_hpte_updateboltedpp() not implemented");
216 static void ps3_hpte_invalidate(unsigned long slot, unsigned long va,
217 int psize, int ssize, int local)
220 unsigned long result;
221 unsigned long pteg, bit;
223 spin_lock_irqsave(&ps3_bolttab_lock, flags);
224 result = lv1_write_htab_entry(0, slot, 0, 0);
227 DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
228 __func__, va, slot, psize, result, result);
232 pteg = slot / HPTES_PER_GROUP;
233 bit = slot % HPTES_PER_GROUP;
234 inusetab[pteg] &= ~(0x80 >> bit);
235 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
238 static void ps3_hpte_clear(void)
242 DBG(" -> %s:%d\n", __func__, __LINE__);
244 result = lv1_unmap_htab(htab_addr);
248 ps3_mm_vas_destroy();
250 DBG(" <- %s:%d\n", __func__, __LINE__);
253 void __init ps3_hpte_init(unsigned long htab_size)
257 DBG(" -> %s:%d\n", __func__, __LINE__);
259 ppc_md.hpte_invalidate = ps3_hpte_invalidate;
260 ppc_md.hpte_updatepp = ps3_hpte_updatepp;
261 ppc_md.hpte_updateboltedpp = ps3_hpte_updateboltedpp;
262 ppc_md.hpte_insert = ps3_hpte_insert;
263 ppc_md.hpte_remove = ps3_hpte_remove;
264 ppc_md.hpte_clear_all = ps3_hpte_clear;
266 ppc64_pft_size = __ilog2(htab_size);
268 bitmap_size = htab_size / sizeof(struct hash_pte) / 8;
270 bolttab = __va(lmb_alloc(bitmap_size, 1));
271 inusetab = __va(lmb_alloc(bitmap_size, 1));
273 memset(bolttab, 0, bitmap_size);
274 memset(inusetab, 0, bitmap_size);
276 DBG(" <- %s:%d\n", __func__, __LINE__);
279 void __init ps3_map_htab(void)
282 unsigned long htab_size = (1UL << ppc64_pft_size);
284 result = lv1_map_htab(0, &htab_addr);
286 htab = (__force struct hash_pte *)ioremap_flags(htab_addr, htab_size,
287 pgprot_val(PAGE_READONLY_X));
289 DBG("%s:%d: lpar %016lxh, virt %016lxh\n", __func__, __LINE__,
290 htab_addr, (unsigned long)htab);