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>
55 #include "moea64_if.h"
56 #include "ps3-hvcall.h"
58 #define VSID_HASH_MASK 0x0000007fffffffffUL
59 #define PTESYNC() __asm __volatile("ptesync")
61 extern int ps3fb_remap(void);
63 static uint64_t mps3_vas_id;
66 * Kernel MMU interface
69 static void mps3_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
70 vm_offset_t kernelend);
71 static void mps3_cpu_bootstrap(mmu_t mmup, int ap);
72 static int64_t mps3_pte_synch(mmu_t, struct pvo_entry *);
73 static int64_t mps3_pte_clear(mmu_t, struct pvo_entry *, uint64_t ptebit);
74 static int64_t mps3_pte_unset(mmu_t, struct pvo_entry *);
75 static int mps3_pte_insert(mmu_t, struct pvo_entry *);
78 static mmu_method_t mps3_methods[] = {
79 MMUMETHOD(mmu_bootstrap, mps3_bootstrap),
80 MMUMETHOD(mmu_cpu_bootstrap, mps3_cpu_bootstrap),
82 MMUMETHOD(moea64_pte_synch, mps3_pte_synch),
83 MMUMETHOD(moea64_pte_clear, mps3_pte_clear),
84 MMUMETHOD(moea64_pte_unset, mps3_pte_unset),
85 MMUMETHOD(moea64_pte_insert, mps3_pte_insert),
90 MMU_DEF_INHERIT(ps3_mmu, "mmu_ps3", mps3_methods, 0, oea64_mmu);
92 static struct mtx mps3_table_lock;
95 mps3_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
97 uint64_t final_pteg_count;
99 mtx_init(&mps3_table_lock, "page table", NULL, MTX_DEF);
101 moea64_early_bootstrap(mmup, kernelstart, kernelend);
103 lv1_construct_virtual_address_space(
104 20 /* log_2(moea64_pteg_count) */, 2 /* n page sizes */,
105 (24UL << 56) | (16UL << 48) /* page sizes 16 MB + 64 KB */,
106 &mps3_vas_id, &final_pteg_count
109 moea64_pteg_count = final_pteg_count / sizeof(struct lpteg);
111 moea64_mid_bootstrap(mmup, kernelstart, kernelend);
112 moea64_late_bootstrap(mmup, kernelstart, kernelend);
116 mps3_cpu_bootstrap(mmu_t mmup, int ap)
118 struct slb *slb = PCPU_GET(slb);
122 mtmsr(mfmsr() & ~PSL_DR & ~PSL_IR);
125 * Destroy the loader's address space if we are coming up for
126 * the first time, and redo the FB mapping so we can continue
131 lv1_destruct_virtual_address_space(0);
133 lv1_select_virtual_address_space(mps3_vas_id);
139 * Install kernel SLB entries
142 __asm __volatile ("slbia");
143 __asm __volatile ("slbmfee %0,%1; slbie %0;" : "=r"(seg0) : "r"(0));
144 for (i = 0; i < 64; i++) {
145 if (!(slb[i].slbe & SLBE_VALID))
148 __asm __volatile ("slbmte %0, %1" ::
149 "r"(slb[i].slbv), "r"(slb[i].slbe));
154 mps3_pte_synch_locked(struct pvo_entry *pvo)
156 uint64_t halfbucket[4], rcbits;
159 lv1_read_htab_entries(mps3_vas_id, pvo->pvo_pte.slot & ~0x3UL,
160 &halfbucket[0], &halfbucket[1], &halfbucket[2], &halfbucket[3],
163 /* Check if present in page table */
164 if ((halfbucket[pvo->pvo_pte.slot & 0x3] & LPTE_AVPN_MASK) !=
165 ((pvo->pvo_vpn >> (ADDR_API_SHFT64 - ADDR_PIDX_SHFT)) &
168 if (!(halfbucket[pvo->pvo_pte.slot & 0x3] & LPTE_VALID))
172 * rcbits contains the low 12 bits of each PTE's 2nd part,
173 * spaced at 16-bit intervals
176 return ((rcbits >> ((3 - (pvo->pvo_pte.slot & 0x3))*16)) &
177 (LPTE_CHG | LPTE_REF));
181 mps3_pte_synch(mmu_t mmu, struct pvo_entry *pvo)
185 mtx_lock(&mps3_table_lock);
186 retval = mps3_pte_synch_locked(pvo);
187 mtx_unlock(&mps3_table_lock);
193 mps3_pte_clear(mmu_t mmu, struct pvo_entry *pvo, uint64_t ptebit)
198 mtx_lock(&mps3_table_lock);
200 refchg = mps3_pte_synch_locked(pvo);
202 mtx_unlock(&mps3_table_lock);
206 moea64_pte_from_pvo(pvo, &pte);
208 pte.pte_lo |= refchg;
209 pte.pte_lo &= ~ptebit;
210 /* XXX: race on RC bits between write and sync. Anything to do? */
211 lv1_write_htab_entry(mps3_vas_id, pvo->pvo_pte.slot, pte.pte_hi,
213 mtx_unlock(&mps3_table_lock);
219 mps3_pte_unset(mmu_t mmu, struct pvo_entry *pvo)
223 mtx_lock(&mps3_table_lock);
224 refchg = mps3_pte_synch_locked(pvo);
226 moea64_pte_overflow--;
227 mtx_unlock(&mps3_table_lock);
230 /* XXX: race on RC bits between unset and sync. Anything to do? */
231 lv1_write_htab_entry(mps3_vas_id, pvo->pvo_pte.slot, 0, 0);
232 mtx_unlock(&mps3_table_lock);
235 return (refchg & (LPTE_REF | LPTE_CHG));
239 mps3_pte_insert(mmu_t mmu, struct pvo_entry *pvo)
242 struct lpte pte, evicted;
245 if (pvo->pvo_vaddr & PVO_HID) {
246 /* Hypercall needs primary PTEG */
247 pvo->pvo_vaddr &= ~PVO_HID;
248 pvo->pvo_pte.slot ^= (moea64_pteg_mask << 3);
251 pvo->pvo_pte.slot &= ~7UL;
252 moea64_pte_from_pvo(pvo, &pte);
255 mtx_lock(&mps3_table_lock);
256 result = lv1_insert_htab_entry(mps3_vas_id, pvo->pvo_pte.slot,
257 pte.pte_hi, pte.pte_lo, LPTE_LOCKED | LPTE_WIRED, 0,
258 &index, &evicted.pte_hi, &evicted.pte_lo);
259 mtx_unlock(&mps3_table_lock);
262 /* No freeable slots in either PTEG? We're hosed. */
263 panic("mps3_pte_insert: overflow (%d)", result);
268 * See where we ended up.
270 if ((index & ~7UL) != pvo->pvo_pte.slot)
271 pvo->pvo_vaddr |= PVO_HID;
272 pvo->pvo_pte.slot = index;
276 if (evicted.pte_hi) {
277 KASSERT((evicted.pte_hi & (LPTE_WIRED | LPTE_LOCKED)) == 0,
278 ("Evicted a wired PTE"));
280 moea64_pte_overflow++;