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#include <linux/memblock.h> 23 24#include <asm/machdep.h> 25#include <asm/prom.h> 26#include <asm/udbg.h> 27#include <asm/lv1call.h> 28#include <asm/ps3fb.h> 29 30#include "platform.h" 31 32/** 33 * enum lpar_vas_id - id of LPAR virtual address space. 34 * @lpar_vas_id_current: Current selected virtual address space 35 * 36 * Identify the target LPAR address space. 37 */ 38 39enum ps3_lpar_vas_id { 40 PS3_LPAR_VAS_ID_CURRENT = 0, 41}; 42 43 44static DEFINE_SPINLOCK(ps3_htab_lock); 45 46static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va, 47 unsigned long pa, unsigned long rflags, unsigned long vflags, 48 int psize, int ssize) 49{ 50 int result; 51 u64 hpte_v, hpte_r; 52 u64 inserted_index; 53 u64 evicted_v, evicted_r; 54 u64 hpte_v_array[4], hpte_rs; 55 unsigned long flags; 56 long ret = -1; 57 58 /* 59 * lv1_insert_htab_entry() will search for victim 60 * entry in both primary and secondary pte group 61 */ 62 vflags &= ~HPTE_V_SECONDARY; 63 64 hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID; 65 hpte_r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags; 66 67 spin_lock_irqsave(&ps3_htab_lock, flags); 68 69 /* talk hvc to replace entries BOLTED == 0 */ 70 result = lv1_insert_htab_entry(PS3_LPAR_VAS_ID_CURRENT, hpte_group, 71 hpte_v, hpte_r, 72 HPTE_V_BOLTED, 0, 73 &inserted_index, 74 &evicted_v, &evicted_r); 75 76 if (result) { 77 /* all entries bolted !*/ 78 pr_info("%s:result=%d va=%lx pa=%lx ix=%lx v=%llx r=%llx\n", 79 __func__, result, va, pa, hpte_group, hpte_v, hpte_r); 80 BUG(); 81 } 82 83 /* 84 * see if the entry is inserted into secondary pteg 85 */ 86 result = lv1_read_htab_entries(PS3_LPAR_VAS_ID_CURRENT, 87 inserted_index & ~0x3UL, 88 &hpte_v_array[0], &hpte_v_array[1], 89 &hpte_v_array[2], &hpte_v_array[3], 90 &hpte_rs); 91 BUG_ON(result); 92 93 if (hpte_v_array[inserted_index % 4] & HPTE_V_SECONDARY) 94 ret = (inserted_index & 7) | (1 << 3); 95 else 96 ret = inserted_index & 7; 97 98 spin_unlock_irqrestore(&ps3_htab_lock, flags); 99 100 return ret; 101} 102 103static long ps3_hpte_remove(unsigned long hpte_group) 104{ 105 panic("ps3_hpte_remove() not implemented"); 106 return 0; 107} 108 109static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp, 110 unsigned long va, int psize, int ssize, int local) 111{ 112 int result; 113 u64 hpte_v, want_v, hpte_rs; 114 u64 hpte_v_array[4]; 115 unsigned long flags; 116 long ret; 117 118 want_v = hpte_encode_v(va, psize, ssize); 119 120 spin_lock_irqsave(&ps3_htab_lock, flags); 121 122 result = lv1_read_htab_entries(PS3_LPAR_VAS_ID_CURRENT, slot & ~0x3UL, 123 &hpte_v_array[0], &hpte_v_array[1], 124 &hpte_v_array[2], &hpte_v_array[3], 125 &hpte_rs); 126 127 if (result) { 128 pr_info("%s: res=%d read va=%lx slot=%lx psize=%d\n", 129 __func__, result, va, slot, psize); 130 BUG(); 131 } 132 133 hpte_v = hpte_v_array[slot % 4]; 134 135 /* 136 * As lv1_read_htab_entries() does not give us the RPN, we can 137 * not synthesize the new hpte_r value here, and therefore can 138 * not update the hpte with lv1_insert_htab_entry(), so we 139 * instead invalidate it and ask the caller to update it via 140 * ps3_hpte_insert() by returning a -1 value. 141 */ 142 if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) { 143 /* not found */ 144 ret = -1; 145 } else { 146 /* entry found, just invalidate it */ 147 result = lv1_write_htab_entry(PS3_LPAR_VAS_ID_CURRENT, 148 slot, 0, 0); 149 ret = -1; 150 } 151 152 spin_unlock_irqrestore(&ps3_htab_lock, flags); 153 return ret; 154} 155 156static void ps3_hpte_updateboltedpp(unsigned long newpp, unsigned long ea, 157 int psize, int ssize) 158{ 159 panic("ps3_hpte_updateboltedpp() not implemented"); 160} 161 162static void ps3_hpte_invalidate(unsigned long slot, unsigned long va, 163 int psize, int ssize, int local) 164{ 165 unsigned long flags; 166 int result; 167 168 spin_lock_irqsave(&ps3_htab_lock, flags); 169 170 result = lv1_write_htab_entry(PS3_LPAR_VAS_ID_CURRENT, slot, 0, 0); 171 172 if (result) { 173 pr_info("%s: res=%d va=%lx slot=%lx psize=%d\n", 174 __func__, result, va, slot, psize); 175 BUG(); 176 } 177 178 spin_unlock_irqrestore(&ps3_htab_lock, flags); 179} 180 181static void ps3_hpte_clear(void) 182{ 183 unsigned long hpte_count = (1UL << ppc64_pft_size) >> 4; 184 u64 i; 185 186 for (i = 0; i < hpte_count; i++) 187 lv1_write_htab_entry(PS3_LPAR_VAS_ID_CURRENT, i, 0, 0); 188 189 ps3_mm_shutdown(); 190 ps3_mm_vas_destroy(); 191} 192 193void __init ps3_hpte_init(unsigned long htab_size) 194{ 195 ppc_md.hpte_invalidate = ps3_hpte_invalidate; 196 ppc_md.hpte_updatepp = ps3_hpte_updatepp; 197 ppc_md.hpte_updateboltedpp = ps3_hpte_updateboltedpp; 198 ppc_md.hpte_insert = ps3_hpte_insert; 199 ppc_md.hpte_remove = ps3_hpte_remove; 200 ppc_md.hpte_clear_all = ps3_hpte_clear; 201 202 ppc64_pft_size = __ilog2(htab_size); 203} 204