1/* 2 * PS3 pagetable management routines. 3 * 4 * Copyright (C) 2006 Sony Computer Entertainment Inc. 5 * Copyright 2006, 2007 Sony Corporation 6 * 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. 10 * 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. 15 * 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 19 */ 20 21#include <linux/kernel.h> 22 23#include <asm/machdep.h> 24#include <asm/lmb.h> 25#include <asm/udbg.h> 26#include <asm/lv1call.h> 27#include <asm/ps3fb.h> 28 29#include "platform.h" 30 31#if defined(DEBUG) 32#define DBG(fmt...) udbg_printf(fmt) 33#else 34#define DBG(fmt...) do{if(0)printk(fmt);}while(0) 35#endif 36 37static hpte_t *htab; 38static unsigned long htab_addr; 39static unsigned char *bolttab; 40static unsigned char *inusetab; 41 42static DEFINE_SPINLOCK(ps3_bolttab_lock); 43 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__) 46static void _debug_dump_hpte(unsigned long pa, unsigned long va, 47 unsigned long group, unsigned long bitmap, hpte_t lhpte, int psize, 48 unsigned long slot, const char* func, int line) 49{ 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); 60} 61 62static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va, 63 unsigned long pa, unsigned long rflags, unsigned long vflags, int psize) 64{ 65 unsigned long slot; 66 hpte_t lhpte; 67 int secondary = 0; 68 unsigned long result; 69 unsigned long bitmap; 70 unsigned long flags; 71 unsigned long p_pteg, s_pteg, b_index, b_mask, cb, ci; 72 73 vflags &= ~HPTE_V_SECONDARY; /* this bit is ignored */ 74 75 lhpte.v = hpte_encode_v(va, psize) | vflags | HPTE_V_VALID; 76 lhpte.r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags; 77 78 p_pteg = hpte_group / HPTES_PER_GROUP; 79 s_pteg = ~p_pteg & htab_hash_mask; 80 81 spin_lock_irqsave(&ps3_bolttab_lock, flags); 82 83 BUG_ON(bolttab[p_pteg] == 0xff && bolttab[s_pteg] == 0xff); 84 85 bitmap = (inusetab[p_pteg] << 8) | inusetab[s_pteg]; 86 87 if (bitmap == 0xffff) { 88 /* 89 * PTEG is full. Search for victim. 90 */ 91 bitmap &= ~((bolttab[p_pteg] << 8) | bolttab[s_pteg]); 92 do { 93 ci = mftb() & 15; 94 cb = 0x8000UL >> ci; 95 } while ((cb & bitmap) == 0); 96 } else { 97 /* 98 * search free slot in hardware order 99 * [primary] 0, 2, 4, 6, 1, 3, 5, 7 100 * [secondary] 0, 2, 4, 6, 1, 3, 5, 7 101 */ 102 for (ci = 0; ci < HPTES_PER_GROUP; ci += 2) { 103 cb = 0x8000UL >> ci; 104 if ((cb & bitmap) == 0) 105 goto found; 106 } 107 for (ci = 1; ci < HPTES_PER_GROUP; ci += 2) { 108 cb = 0x8000UL >> ci; 109 if ((cb & bitmap) == 0) 110 goto found; 111 } 112 for (ci = HPTES_PER_GROUP; ci < HPTES_PER_GROUP*2; ci += 2) { 113 cb = 0x8000UL >> ci; 114 if ((cb & bitmap) == 0) 115 goto found; 116 } 117 for (ci = HPTES_PER_GROUP+1; ci < HPTES_PER_GROUP*2; ci += 2) { 118 cb = 0x8000UL >> ci; 119 if ((cb & bitmap) == 0) 120 goto found; 121 } 122 } 123 124found: 125 if (ci < HPTES_PER_GROUP) { 126 slot = p_pteg * HPTES_PER_GROUP + ci; 127 } else { 128 slot = s_pteg * HPTES_PER_GROUP + (ci & 7); 129 /* lhpte.dw0.dw0.h = 1; */ 130 vflags |= HPTE_V_SECONDARY; 131 lhpte.v |= HPTE_V_SECONDARY; 132 } 133 134 result = lv1_write_htab_entry(0, slot, lhpte.v, lhpte.r); 135 136 if (result) { 137 debug_dump_hpte(pa, va, hpte_group, bitmap, lhpte, psize, slot); 138 BUG(); 139 } 140 141 /* 142 * If used slot is not in primary HPTE group, 143 * the slot should be in secondary HPTE group. 144 */ 145 146 if ((hpte_group ^ slot) & ~(HPTES_PER_GROUP - 1)) { 147 secondary = 1; 148 b_index = s_pteg; 149 } else { 150 secondary = 0; 151 b_index = p_pteg; 152 } 153 154 b_mask = (lhpte.v & HPTE_V_BOLTED) ? 1 << 7 : 0 << 7; 155 bolttab[b_index] |= b_mask >> (slot & 7); 156 b_mask = 1 << 7; 157 inusetab[b_index] |= b_mask >> (slot & 7); 158 spin_unlock_irqrestore(&ps3_bolttab_lock, flags); 159 160 return (slot & 7) | (secondary << 3); 161} 162 163static long ps3_hpte_remove(unsigned long hpte_group) 164{ 165 panic("ps3_hpte_remove() not implemented"); 166 return 0; 167} 168 169static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp, 170 unsigned long va, int psize, int local) 171{ 172 unsigned long flags; 173 unsigned long result; 174 unsigned long pteg, bit; 175 unsigned long hpte_v, want_v; 176 177 want_v = hpte_encode_v(va, psize); 178 179 spin_lock_irqsave(&ps3_bolttab_lock, flags); 180 181 hpte_v = htab[slot].v; 182 if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) { 183 spin_unlock_irqrestore(&ps3_bolttab_lock, flags); 184 185 /* ps3_hpte_insert() will be used to update PTE */ 186 return -1; 187 } 188 189 result = lv1_write_htab_entry(0, slot, 0, 0); 190 191 if (result) { 192 DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n", 193 __func__, va, slot, psize, result, result); 194 BUG(); 195 } 196 197 pteg = slot / HPTES_PER_GROUP; 198 bit = slot % HPTES_PER_GROUP; 199 inusetab[pteg] &= ~(0x80 >> bit); 200 201 spin_unlock_irqrestore(&ps3_bolttab_lock, flags); 202 203 /* ps3_hpte_insert() will be used to update PTE */ 204 return -1; 205} 206 207static void ps3_hpte_updateboltedpp(unsigned long newpp, unsigned long ea, 208 int psize) 209{ 210 panic("ps3_hpte_updateboltedpp() not implemented"); 211} 212 213static void ps3_hpte_invalidate(unsigned long slot, unsigned long va, 214 int psize, int local) 215{ 216 unsigned long flags; 217 unsigned long result; 218 unsigned long pteg, bit; 219 220 spin_lock_irqsave(&ps3_bolttab_lock, flags); 221 result = lv1_write_htab_entry(0, slot, 0, 0); 222 223 if (result) { 224 DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n", 225 __func__, va, slot, psize, result, result); 226 BUG(); 227 } 228 229 pteg = slot / HPTES_PER_GROUP; 230 bit = slot % HPTES_PER_GROUP; 231 inusetab[pteg] &= ~(0x80 >> bit); 232 spin_unlock_irqrestore(&ps3_bolttab_lock, flags); 233} 234 235static void ps3_hpte_clear(void) 236{ 237 /* Make sure to clean up the frame buffer device first */ 238 ps3fb_cleanup(); 239 240 lv1_unmap_htab(htab_addr); 241} 242 243void __init ps3_hpte_init(unsigned long htab_size) 244{ 245 long bitmap_size; 246 247 DBG(" -> %s:%d\n", __func__, __LINE__); 248 249 ppc_md.hpte_invalidate = ps3_hpte_invalidate; 250 ppc_md.hpte_updatepp = ps3_hpte_updatepp; 251 ppc_md.hpte_updateboltedpp = ps3_hpte_updateboltedpp; 252 ppc_md.hpte_insert = ps3_hpte_insert; 253 ppc_md.hpte_remove = ps3_hpte_remove; 254 ppc_md.hpte_clear_all = ps3_hpte_clear; 255 256 ppc64_pft_size = __ilog2(htab_size); 257 258 bitmap_size = htab_size / sizeof(hpte_t) / 8; 259 260 bolttab = __va(lmb_alloc(bitmap_size, 1)); 261 inusetab = __va(lmb_alloc(bitmap_size, 1)); 262 263 memset(bolttab, 0, bitmap_size); 264 memset(inusetab, 0, bitmap_size); 265 266 DBG(" <- %s:%d\n", __func__, __LINE__); 267} 268 269void __init ps3_map_htab(void) 270{ 271 long result; 272 unsigned long htab_size = (1UL << ppc64_pft_size); 273 274 result = lv1_map_htab(0, &htab_addr); 275 276 htab = (hpte_t *)__ioremap(htab_addr, htab_size, 277 pgprot_val(PAGE_READONLY_X)); 278 279 DBG("%s:%d: lpar %016lxh, virt %016lxh\n", __func__, __LINE__, 280 htab_addr, (unsigned long)htab); 281} 282