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>
23 #include <asm/machdep.h>
26 #include <asm/lv1call.h>
27 #include <asm/ps3fb.h>
32 #define DBG udbg_printf
37 static struct hash_pte *htab;
38 static unsigned long htab_addr;
39 static unsigned char *bolttab;
40 static unsigned char *inusetab;
42 static DEFINE_SPINLOCK(ps3_bolttab_lock);
44 #define debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g) \
45 _debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g, __func__, __LINE__)
46 static void _debug_dump_hpte(unsigned long pa, unsigned long va,
47 unsigned long group, unsigned long bitmap, struct hash_pte lhpte,
48 int psize, unsigned long slot, const char* func, int line)
50 DBG("%s:%d: pa = %lxh\n", func, line, pa);
51 DBG("%s:%d: lpar = %lxh\n", func, line,
52 ps3_mm_phys_to_lpar(pa));
53 DBG("%s:%d: va = %lxh\n", func, line, va);
54 DBG("%s:%d: group = %lxh\n", func, line, group);
55 DBG("%s:%d: bitmap = %lxh\n", func, line, bitmap);
56 DBG("%s:%d: hpte.v = %lxh\n", func, line, lhpte.v);
57 DBG("%s:%d: hpte.r = %lxh\n", func, line, lhpte.r);
58 DBG("%s:%d: psize = %xh\n", func, line, psize);
59 DBG("%s:%d: slot = %lxh\n", func, line, slot);
62 static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va,
63 unsigned long pa, unsigned long rflags, unsigned long vflags,
67 struct hash_pte lhpte;
72 unsigned long p_pteg, s_pteg, b_index, b_mask, cb, ci;
74 vflags &= ~HPTE_V_SECONDARY; /* this bit is ignored */
76 lhpte.v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
77 vflags | HPTE_V_VALID;
78 lhpte.r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags;
80 p_pteg = hpte_group / HPTES_PER_GROUP;
81 s_pteg = ~p_pteg & htab_hash_mask;
83 spin_lock_irqsave(&ps3_bolttab_lock, flags);
85 BUG_ON(bolttab[p_pteg] == 0xff && bolttab[s_pteg] == 0xff);
87 bitmap = (inusetab[p_pteg] << 8) | inusetab[s_pteg];
89 if (bitmap == 0xffff) {
91 * PTEG is full. Search for victim.
93 bitmap &= ~((bolttab[p_pteg] << 8) | bolttab[s_pteg]);
97 } while ((cb & bitmap) == 0);
100 * search free slot in hardware order
101 * [primary] 0, 2, 4, 6, 1, 3, 5, 7
102 * [secondary] 0, 2, 4, 6, 1, 3, 5, 7
104 for (ci = 0; ci < HPTES_PER_GROUP; ci += 2) {
106 if ((cb & bitmap) == 0)
109 for (ci = 1; ci < HPTES_PER_GROUP; ci += 2) {
111 if ((cb & bitmap) == 0)
114 for (ci = HPTES_PER_GROUP; ci < HPTES_PER_GROUP*2; ci += 2) {
116 if ((cb & bitmap) == 0)
119 for (ci = HPTES_PER_GROUP+1; ci < HPTES_PER_GROUP*2; ci += 2) {
121 if ((cb & bitmap) == 0)
127 if (ci < HPTES_PER_GROUP) {
128 slot = p_pteg * HPTES_PER_GROUP + ci;
130 slot = s_pteg * HPTES_PER_GROUP + (ci & 7);
131 /* lhpte.dw0.dw0.h = 1; */
132 vflags |= HPTE_V_SECONDARY;
133 lhpte.v |= HPTE_V_SECONDARY;
136 result = lv1_write_htab_entry(0, slot, lhpte.v, lhpte.r);
139 debug_dump_hpte(pa, va, hpte_group, bitmap, lhpte, psize, slot);
144 * If used slot is not in primary HPTE group,
145 * the slot should be in secondary HPTE group.
148 if ((hpte_group ^ slot) & ~(HPTES_PER_GROUP - 1)) {
156 b_mask = (lhpte.v & HPTE_V_BOLTED) ? 1 << 7 : 0 << 7;
157 bolttab[b_index] |= b_mask >> (slot & 7);
159 inusetab[b_index] |= b_mask >> (slot & 7);
160 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
162 return (slot & 7) | (secondary << 3);
165 static long ps3_hpte_remove(unsigned long hpte_group)
167 panic("ps3_hpte_remove() not implemented");
171 static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp,
172 unsigned long va, int psize, int ssize, int local)
175 unsigned long result;
176 unsigned long pteg, bit;
177 unsigned long hpte_v, want_v;
179 want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
181 spin_lock_irqsave(&ps3_bolttab_lock, flags);
183 hpte_v = htab[slot].v;
184 if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) {
185 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
187 /* ps3_hpte_insert() will be used to update PTE */
191 result = lv1_write_htab_entry(0, slot, 0, 0);
194 DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
195 __func__, va, slot, psize, result, result);
199 pteg = slot / HPTES_PER_GROUP;
200 bit = slot % HPTES_PER_GROUP;
201 inusetab[pteg] &= ~(0x80 >> bit);
203 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
205 /* ps3_hpte_insert() will be used to update PTE */
209 static void ps3_hpte_updateboltedpp(unsigned long newpp, unsigned long ea,
210 int psize, int ssize)
212 panic("ps3_hpte_updateboltedpp() not implemented");
215 static void ps3_hpte_invalidate(unsigned long slot, unsigned long va,
216 int psize, int ssize, int local)
219 unsigned long result;
220 unsigned long pteg, bit;
222 spin_lock_irqsave(&ps3_bolttab_lock, flags);
223 result = lv1_write_htab_entry(0, slot, 0, 0);
226 DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
227 __func__, va, slot, psize, result, result);
231 pteg = slot / HPTES_PER_GROUP;
232 bit = slot % HPTES_PER_GROUP;
233 inusetab[pteg] &= ~(0x80 >> bit);
234 spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
237 static void ps3_hpte_clear(void)
241 DBG(" -> %s:%d\n", __func__, __LINE__);
243 result = lv1_unmap_htab(htab_addr);
247 ps3_mm_vas_destroy();
249 DBG(" <- %s:%d\n", __func__, __LINE__);
252 void __init ps3_hpte_init(unsigned long htab_size)
256 DBG(" -> %s:%d\n", __func__, __LINE__);
258 ppc_md.hpte_invalidate = ps3_hpte_invalidate;
259 ppc_md.hpte_updatepp = ps3_hpte_updatepp;
260 ppc_md.hpte_updateboltedpp = ps3_hpte_updateboltedpp;
261 ppc_md.hpte_insert = ps3_hpte_insert;
262 ppc_md.hpte_remove = ps3_hpte_remove;
263 ppc_md.hpte_clear_all = ps3_hpte_clear;
265 ppc64_pft_size = __ilog2(htab_size);
267 bitmap_size = htab_size / sizeof(struct hash_pte) / 8;
269 bolttab = __va(lmb_alloc(bitmap_size, 1));
270 inusetab = __va(lmb_alloc(bitmap_size, 1));
272 memset(bolttab, 0, bitmap_size);
273 memset(inusetab, 0, bitmap_size);
275 DBG(" <- %s:%d\n", __func__, __LINE__);
278 void __init ps3_map_htab(void)
281 unsigned long htab_size = (1UL << ppc64_pft_size);
283 result = lv1_map_htab(0, &htab_addr);
285 htab = (__force struct hash_pte *)ioremap_flags(htab_addr, htab_size,
286 pgprot_val(PAGE_READONLY_X));
288 DBG("%s:%d: lpar %016lxh, virt %016lxh\n", __func__, __LINE__,
289 htab_addr, (unsigned long)htab);