2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (C) 2010 Nathan Whitehorn
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/kernel.h>
35 #include <sys/msgbuf.h>
36 #include <sys/mutex.h>
38 #include <sys/sysctl.h>
39 #include <sys/systm.h>
40 #include <sys/vmmeter.h>
43 #include <vm/vm_param.h>
44 #include <vm/vm_kern.h>
45 #include <vm/vm_page.h>
46 #include <vm/vm_map.h>
47 #include <vm/vm_object.h>
48 #include <vm/vm_extern.h>
49 #include <vm/vm_pageout.h>
52 #include <powerpc/aim/mmu_oea64.h>
54 #include "ps3-hvcall.h"
56 #define VSID_HASH_MASK 0x0000007fffffffffUL
57 #define PTESYNC() __asm __volatile("ptesync")
59 extern int ps3fb_remap(void);
61 static uint64_t mps3_vas_id;
64 * Kernel MMU interface
67 static void mps3_install(void);
68 static void mps3_bootstrap(vm_offset_t kernelstart,
69 vm_offset_t kernelend);
70 static void mps3_cpu_bootstrap(int ap);
71 static int64_t mps3_pte_synch(struct pvo_entry *);
72 static int64_t mps3_pte_clear(struct pvo_entry *, uint64_t ptebit);
73 static int64_t mps3_pte_unset(struct pvo_entry *);
74 static int64_t mps3_pte_insert(struct pvo_entry *);
76 static struct pmap_funcs mps3_methods = {
77 .install = mps3_install,
78 .bootstrap = mps3_bootstrap,
79 .cpu_bootstrap = mps3_cpu_bootstrap,
82 static struct moea64_funcs mps3_funcs = {
83 .pte_synch = mps3_pte_synch,
84 .pte_clear = mps3_pte_clear,
85 .pte_unset = mps3_pte_unset,
86 .pte_insert = mps3_pte_insert,
89 MMU_DEF_INHERIT(ps3_mmu, "mmu_ps3", mps3_methods, oea64_mmu);
91 static struct mtx mps3_table_lock;
96 moea64_ops = &mps3_funcs;
101 mps3_bootstrap(vm_offset_t kernelstart, vm_offset_t kernelend)
103 uint64_t final_pteg_count;
105 mtx_init(&mps3_table_lock, "page table", NULL, MTX_DEF);
107 moea64_early_bootstrap(kernelstart, kernelend);
109 /* In case we had a page table already */
110 lv1_destruct_virtual_address_space(0);
112 /* Allocate new hardware page table */
113 lv1_construct_virtual_address_space(
114 20 /* log_2(moea64_pteg_count) */, 2 /* n page sizes */,
115 (24UL << 56) | (16UL << 48) /* page sizes 16 MB + 64 KB */,
116 &mps3_vas_id, &final_pteg_count
119 lv1_select_virtual_address_space(mps3_vas_id);
121 moea64_pteg_count = final_pteg_count / sizeof(struct lpteg);
123 moea64_mid_bootstrap(kernelstart, kernelend);
124 moea64_late_bootstrap(kernelstart, kernelend);
128 mps3_cpu_bootstrap(int ap)
130 struct slb *slb = PCPU_GET(aim.slb);
134 mtmsr(mfmsr() & ~PSL_DR & ~PSL_IR);
137 * Select the page table we configured above and set up the FB mapping
138 * so we can have a console.
140 lv1_select_virtual_address_space(mps3_vas_id);
146 * Install kernel SLB entries
149 __asm __volatile ("slbia");
150 __asm __volatile ("slbmfee %0,%1; slbie %0;" : "=r"(seg0) : "r"(0));
151 for (i = 0; i < 64; i++) {
152 if (!(slb[i].slbe & SLBE_VALID))
155 __asm __volatile ("slbmte %0, %1" ::
156 "r"(slb[i].slbv), "r"(slb[i].slbe));
161 mps3_pte_synch_locked(struct pvo_entry *pvo)
163 uint64_t halfbucket[4], rcbits;
166 lv1_read_htab_entries(mps3_vas_id, pvo->pvo_pte.slot & ~0x3UL,
167 &halfbucket[0], &halfbucket[1], &halfbucket[2], &halfbucket[3],
170 /* Check if present in page table */
171 if ((halfbucket[pvo->pvo_pte.slot & 0x3] & LPTE_AVPN_MASK) !=
172 ((pvo->pvo_vpn >> (ADDR_API_SHFT64 - ADDR_PIDX_SHFT)) &
175 if (!(halfbucket[pvo->pvo_pte.slot & 0x3] & LPTE_VALID))
179 * rcbits contains the low 12 bits of each PTE's 2nd part,
180 * spaced at 16-bit intervals
183 return ((rcbits >> ((3 - (pvo->pvo_pte.slot & 0x3))*16)) &
184 (LPTE_CHG | LPTE_REF));
188 mps3_pte_synch(struct pvo_entry *pvo)
192 mtx_lock(&mps3_table_lock);
193 retval = mps3_pte_synch_locked(pvo);
194 mtx_unlock(&mps3_table_lock);
200 mps3_pte_clear(struct pvo_entry *pvo, uint64_t ptebit)
205 mtx_lock(&mps3_table_lock);
207 refchg = mps3_pte_synch_locked(pvo);
209 mtx_unlock(&mps3_table_lock);
213 moea64_pte_from_pvo(pvo, &pte);
215 pte.pte_lo |= refchg;
216 pte.pte_lo &= ~ptebit;
217 /* XXX: race on RC bits between write and sync. Anything to do? */
218 lv1_write_htab_entry(mps3_vas_id, pvo->pvo_pte.slot, pte.pte_hi,
220 mtx_unlock(&mps3_table_lock);
226 mps3_pte_unset(struct pvo_entry *pvo)
230 mtx_lock(&mps3_table_lock);
231 refchg = mps3_pte_synch_locked(pvo);
233 STAT_MOEA64(moea64_pte_overflow--);
234 mtx_unlock(&mps3_table_lock);
237 /* XXX: race on RC bits between unset and sync. Anything to do? */
238 lv1_write_htab_entry(mps3_vas_id, pvo->pvo_pte.slot, 0, 0);
239 mtx_unlock(&mps3_table_lock);
240 STAT_MOEA64(moea64_pte_valid--);
242 return (refchg & (LPTE_REF | LPTE_CHG));
246 mps3_pte_insert(struct pvo_entry *pvo)
249 struct lpte pte, evicted;
252 if (pvo->pvo_vaddr & PVO_HID) {
253 /* Hypercall needs primary PTEG */
254 pvo->pvo_vaddr &= ~PVO_HID;
255 pvo->pvo_pte.slot ^= (moea64_pteg_mask << 3);
258 pvo->pvo_pte.slot &= ~7UL;
259 moea64_pte_from_pvo(pvo, &pte);
262 mtx_lock(&mps3_table_lock);
263 result = lv1_insert_htab_entry(mps3_vas_id, pvo->pvo_pte.slot,
264 pte.pte_hi, pte.pte_lo, LPTE_LOCKED | LPTE_WIRED, 0,
265 &index, &evicted.pte_hi, &evicted.pte_lo);
266 mtx_unlock(&mps3_table_lock);
269 /* No freeable slots in either PTEG? We're hosed. */
270 panic("mps3_pte_insert: overflow (%d)", result);
275 * See where we ended up.
277 if ((index & ~7UL) != pvo->pvo_pte.slot)
278 pvo->pvo_vaddr |= PVO_HID;
279 pvo->pvo_pte.slot = index;
281 STAT_MOEA64(moea64_pte_valid++);
283 if (evicted.pte_hi) {
284 KASSERT((evicted.pte_hi & (LPTE_WIRED | LPTE_LOCKED)) == 0,
285 ("Evicted a wired PTE"));
286 STAT_MOEA64(moea64_pte_valid--);
287 STAT_MOEA64(moea64_pte_overflow++);