441 lines
12 KiB
C
441 lines
12 KiB
C
/*
|
|
* "Cell Reference Set" HTAB support.
|
|
*
|
|
* (C) Copyright 2006-2007 TOSHIBA CORPORATION
|
|
*
|
|
* This code is based on arch/powerpc/platforms/pseries/lpar.c:
|
|
* Copyright (C) 2001 Todd Inglett, IBM Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#undef DEBUG_LOW
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm/mmu.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/udbg.h>
|
|
|
|
#include "beat_wrapper.h"
|
|
|
|
#ifdef DEBUG_LOW
|
|
#define DBG_LOW(fmt...) do { udbg_printf(fmt); } while(0)
|
|
#else
|
|
#define DBG_LOW(fmt...) do { } while(0)
|
|
#endif
|
|
|
|
static DEFINE_SPINLOCK(beat_htab_lock);
|
|
|
|
static inline unsigned int beat_read_mask(unsigned hpte_group)
|
|
{
|
|
unsigned long hpte_v[5];
|
|
unsigned long rmask = 0;
|
|
|
|
beat_read_htab_entries(0, hpte_group + 0, hpte_v);
|
|
if (!(hpte_v[0] & HPTE_V_BOLTED))
|
|
rmask |= 0x8000;
|
|
if (!(hpte_v[1] & HPTE_V_BOLTED))
|
|
rmask |= 0x4000;
|
|
if (!(hpte_v[2] & HPTE_V_BOLTED))
|
|
rmask |= 0x2000;
|
|
if (!(hpte_v[3] & HPTE_V_BOLTED))
|
|
rmask |= 0x1000;
|
|
beat_read_htab_entries(0, hpte_group + 4, hpte_v);
|
|
if (!(hpte_v[0] & HPTE_V_BOLTED))
|
|
rmask |= 0x0800;
|
|
if (!(hpte_v[1] & HPTE_V_BOLTED))
|
|
rmask |= 0x0400;
|
|
if (!(hpte_v[2] & HPTE_V_BOLTED))
|
|
rmask |= 0x0200;
|
|
if (!(hpte_v[3] & HPTE_V_BOLTED))
|
|
rmask |= 0x0100;
|
|
hpte_group = ~hpte_group & (htab_hash_mask * HPTES_PER_GROUP);
|
|
beat_read_htab_entries(0, hpte_group + 0, hpte_v);
|
|
if (!(hpte_v[0] & HPTE_V_BOLTED))
|
|
rmask |= 0x80;
|
|
if (!(hpte_v[1] & HPTE_V_BOLTED))
|
|
rmask |= 0x40;
|
|
if (!(hpte_v[2] & HPTE_V_BOLTED))
|
|
rmask |= 0x20;
|
|
if (!(hpte_v[3] & HPTE_V_BOLTED))
|
|
rmask |= 0x10;
|
|
beat_read_htab_entries(0, hpte_group + 4, hpte_v);
|
|
if (!(hpte_v[0] & HPTE_V_BOLTED))
|
|
rmask |= 0x08;
|
|
if (!(hpte_v[1] & HPTE_V_BOLTED))
|
|
rmask |= 0x04;
|
|
if (!(hpte_v[2] & HPTE_V_BOLTED))
|
|
rmask |= 0x02;
|
|
if (!(hpte_v[3] & HPTE_V_BOLTED))
|
|
rmask |= 0x01;
|
|
return rmask;
|
|
}
|
|
|
|
static long beat_lpar_hpte_insert(unsigned long hpte_group,
|
|
unsigned long va, unsigned long pa,
|
|
unsigned long rflags, unsigned long vflags,
|
|
int psize, int ssize)
|
|
{
|
|
unsigned long lpar_rc;
|
|
unsigned long slot;
|
|
unsigned long hpte_v, hpte_r;
|
|
|
|
/* same as iseries */
|
|
if (vflags & HPTE_V_SECONDARY)
|
|
return -1;
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
|
|
"rflags=%lx, vflags=%lx, psize=%d)\n",
|
|
hpte_group, va, pa, rflags, vflags, psize);
|
|
|
|
hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
|
|
vflags | HPTE_V_VALID;
|
|
hpte_r = hpte_encode_r(pa, psize) | rflags;
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
|
|
|
|
if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
|
|
hpte_r &= ~_PAGE_COHERENT;
|
|
|
|
spin_lock(&beat_htab_lock);
|
|
if ((lpar_rc = beat_read_mask(hpte_group)) == 0) {
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW(" full\n");
|
|
spin_unlock(&beat_htab_lock);
|
|
return -1;
|
|
}
|
|
|
|
lpar_rc = beat_insert_htab_entry(0, hpte_group, lpar_rc << 48,
|
|
hpte_v, hpte_r, &slot);
|
|
spin_unlock(&beat_htab_lock);
|
|
|
|
/*
|
|
* Since we try and ioremap PHBs we don't own, the pte insert
|
|
* will fail. However we must catch the failure in hash_page
|
|
* or we will loop forever, so return -2 in this case.
|
|
*/
|
|
if (unlikely(lpar_rc != 0)) {
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW(" lpar err %lx\n", lpar_rc);
|
|
return -2;
|
|
}
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW(" -> slot: %lx\n", slot);
|
|
|
|
/* We have to pass down the secondary bucket bit here as well */
|
|
return (slot ^ hpte_group) & 15;
|
|
}
|
|
|
|
static long beat_lpar_hpte_remove(unsigned long hpte_group)
|
|
{
|
|
DBG_LOW("hpte_remove(group=%lx)\n", hpte_group);
|
|
return -1;
|
|
}
|
|
|
|
static unsigned long beat_lpar_hpte_getword0(unsigned long slot)
|
|
{
|
|
unsigned long dword0, dword[5];
|
|
unsigned long lpar_rc;
|
|
|
|
lpar_rc = beat_read_htab_entries(0, slot & ~3UL, dword);
|
|
|
|
dword0 = dword[slot&3];
|
|
|
|
BUG_ON(lpar_rc != 0);
|
|
|
|
return dword0;
|
|
}
|
|
|
|
static void beat_lpar_hptab_clear(void)
|
|
{
|
|
unsigned long size_bytes = 1UL << ppc64_pft_size;
|
|
unsigned long hpte_count = size_bytes >> 4;
|
|
int i;
|
|
unsigned long dummy0, dummy1;
|
|
|
|
/* TODO: Use bulk call */
|
|
for (i = 0; i < hpte_count; i++)
|
|
beat_write_htab_entry(0, i, 0, 0, -1UL, -1UL, &dummy0, &dummy1);
|
|
}
|
|
|
|
/*
|
|
* NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
|
|
* the low 3 bits of flags happen to line up. So no transform is needed.
|
|
* We can probably optimize here and assume the high bits of newpp are
|
|
* already zero. For now I am paranoid.
|
|
*/
|
|
static long beat_lpar_hpte_updatepp(unsigned long slot,
|
|
unsigned long newpp,
|
|
unsigned long va,
|
|
int psize, int ssize, int local)
|
|
{
|
|
unsigned long lpar_rc;
|
|
unsigned long dummy0, dummy1, want_v;
|
|
|
|
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
|
|
|
|
DBG_LOW(" update: "
|
|
"avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
|
|
want_v & HPTE_V_AVPN, slot, psize, newpp);
|
|
|
|
spin_lock(&beat_htab_lock);
|
|
dummy0 = beat_lpar_hpte_getword0(slot);
|
|
if ((dummy0 & ~0x7FUL) != (want_v & ~0x7FUL)) {
|
|
DBG_LOW("not found !\n");
|
|
spin_unlock(&beat_htab_lock);
|
|
return -1;
|
|
}
|
|
|
|
lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, &dummy0,
|
|
&dummy1);
|
|
spin_unlock(&beat_htab_lock);
|
|
if (lpar_rc != 0 || dummy0 == 0) {
|
|
DBG_LOW("not found !\n");
|
|
return -1;
|
|
}
|
|
|
|
DBG_LOW("ok %lx %lx\n", dummy0, dummy1);
|
|
|
|
BUG_ON(lpar_rc != 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long beat_lpar_hpte_find(unsigned long va, int psize)
|
|
{
|
|
unsigned long hash;
|
|
unsigned long i, j;
|
|
long slot;
|
|
unsigned long want_v, hpte_v;
|
|
|
|
hash = hpt_hash(va, mmu_psize_defs[psize].shift, MMU_SEGSIZE_256M);
|
|
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
|
|
|
|
for (j = 0; j < 2; j++) {
|
|
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
for (i = 0; i < HPTES_PER_GROUP; i++) {
|
|
hpte_v = beat_lpar_hpte_getword0(slot);
|
|
|
|
if (HPTE_V_COMPARE(hpte_v, want_v)
|
|
&& (hpte_v & HPTE_V_VALID)
|
|
&& (!!(hpte_v & HPTE_V_SECONDARY) == j)) {
|
|
/* HPTE matches */
|
|
if (j)
|
|
slot = -slot;
|
|
return slot;
|
|
}
|
|
++slot;
|
|
}
|
|
hash = ~hash;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void beat_lpar_hpte_updateboltedpp(unsigned long newpp,
|
|
unsigned long ea,
|
|
int psize, int ssize)
|
|
{
|
|
unsigned long lpar_rc, slot, vsid, va, dummy0, dummy1;
|
|
|
|
vsid = get_kernel_vsid(ea, MMU_SEGSIZE_256M);
|
|
va = (vsid << 28) | (ea & 0x0fffffff);
|
|
|
|
spin_lock(&beat_htab_lock);
|
|
slot = beat_lpar_hpte_find(va, psize);
|
|
BUG_ON(slot == -1);
|
|
|
|
lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7,
|
|
&dummy0, &dummy1);
|
|
spin_unlock(&beat_htab_lock);
|
|
|
|
BUG_ON(lpar_rc != 0);
|
|
}
|
|
|
|
static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
|
|
int psize, int ssize, int local)
|
|
{
|
|
unsigned long want_v;
|
|
unsigned long lpar_rc;
|
|
unsigned long dummy1, dummy2;
|
|
unsigned long flags;
|
|
|
|
DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
|
|
slot, va, psize, local);
|
|
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
|
|
|
|
spin_lock_irqsave(&beat_htab_lock, flags);
|
|
dummy1 = beat_lpar_hpte_getword0(slot);
|
|
|
|
if ((dummy1 & ~0x7FUL) != (want_v & ~0x7FUL)) {
|
|
DBG_LOW("not found !\n");
|
|
spin_unlock_irqrestore(&beat_htab_lock, flags);
|
|
return;
|
|
}
|
|
|
|
lpar_rc = beat_write_htab_entry(0, slot, 0, 0, HPTE_V_VALID, 0,
|
|
&dummy1, &dummy2);
|
|
spin_unlock_irqrestore(&beat_htab_lock, flags);
|
|
|
|
BUG_ON(lpar_rc != 0);
|
|
}
|
|
|
|
void __init hpte_init_beat(void)
|
|
{
|
|
ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate;
|
|
ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp;
|
|
ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
|
|
ppc_md.hpte_insert = beat_lpar_hpte_insert;
|
|
ppc_md.hpte_remove = beat_lpar_hpte_remove;
|
|
ppc_md.hpte_clear_all = beat_lpar_hptab_clear;
|
|
}
|
|
|
|
static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
|
|
unsigned long va, unsigned long pa,
|
|
unsigned long rflags, unsigned long vflags,
|
|
int psize, int ssize)
|
|
{
|
|
unsigned long lpar_rc;
|
|
unsigned long slot;
|
|
unsigned long hpte_v, hpte_r;
|
|
|
|
/* same as iseries */
|
|
if (vflags & HPTE_V_SECONDARY)
|
|
return -1;
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, "
|
|
"rflags=%lx, vflags=%lx, psize=%d)\n",
|
|
hpte_group, va, pa, rflags, vflags, psize);
|
|
|
|
hpte_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
|
|
vflags | HPTE_V_VALID;
|
|
hpte_r = hpte_encode_r(pa, psize) | rflags;
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
|
|
|
|
if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
|
|
hpte_r &= ~_PAGE_COHERENT;
|
|
|
|
/* insert into not-volted entry */
|
|
lpar_rc = beat_insert_htab_entry3(0, hpte_group, hpte_v, hpte_r,
|
|
HPTE_V_BOLTED, 0, &slot);
|
|
/*
|
|
* Since we try and ioremap PHBs we don't own, the pte insert
|
|
* will fail. However we must catch the failure in hash_page
|
|
* or we will loop forever, so return -2 in this case.
|
|
*/
|
|
if (unlikely(lpar_rc != 0)) {
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW(" lpar err %lx\n", lpar_rc);
|
|
return -2;
|
|
}
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
DBG_LOW(" -> slot: %lx\n", slot);
|
|
|
|
/* We have to pass down the secondary bucket bit here as well */
|
|
return (slot ^ hpte_group) & 15;
|
|
}
|
|
|
|
/*
|
|
* NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
|
|
* the low 3 bits of flags happen to line up. So no transform is needed.
|
|
* We can probably optimize here and assume the high bits of newpp are
|
|
* already zero. For now I am paranoid.
|
|
*/
|
|
static long beat_lpar_hpte_updatepp_v3(unsigned long slot,
|
|
unsigned long newpp,
|
|
unsigned long va,
|
|
int psize, int ssize, int local)
|
|
{
|
|
unsigned long lpar_rc;
|
|
unsigned long want_v;
|
|
unsigned long pss;
|
|
|
|
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
|
|
pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
|
|
|
|
DBG_LOW(" update: "
|
|
"avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
|
|
want_v & HPTE_V_AVPN, slot, psize, newpp);
|
|
|
|
lpar_rc = beat_update_htab_permission3(0, slot, want_v, pss, 7, newpp);
|
|
|
|
if (lpar_rc == 0xfffffff7) {
|
|
DBG_LOW("not found !\n");
|
|
return -1;
|
|
}
|
|
|
|
DBG_LOW("ok\n");
|
|
|
|
BUG_ON(lpar_rc != 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void beat_lpar_hpte_invalidate_v3(unsigned long slot, unsigned long va,
|
|
int psize, int ssize, int local)
|
|
{
|
|
unsigned long want_v;
|
|
unsigned long lpar_rc;
|
|
unsigned long pss;
|
|
|
|
DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
|
|
slot, va, psize, local);
|
|
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
|
|
pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc;
|
|
|
|
lpar_rc = beat_invalidate_htab_entry3(0, slot, want_v, pss);
|
|
|
|
/* E_busy can be valid output: page may be already replaced */
|
|
BUG_ON(lpar_rc != 0 && lpar_rc != 0xfffffff7);
|
|
}
|
|
|
|
static int64_t _beat_lpar_hptab_clear_v3(void)
|
|
{
|
|
return beat_clear_htab3(0);
|
|
}
|
|
|
|
static void beat_lpar_hptab_clear_v3(void)
|
|
{
|
|
_beat_lpar_hptab_clear_v3();
|
|
}
|
|
|
|
void __init hpte_init_beat_v3(void)
|
|
{
|
|
if (_beat_lpar_hptab_clear_v3() == 0) {
|
|
ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate_v3;
|
|
ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp_v3;
|
|
ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
|
|
ppc_md.hpte_insert = beat_lpar_hpte_insert_v3;
|
|
ppc_md.hpte_remove = beat_lpar_hpte_remove;
|
|
ppc_md.hpte_clear_all = beat_lpar_hptab_clear_v3;
|
|
} else {
|
|
ppc_md.hpte_invalidate = beat_lpar_hpte_invalidate;
|
|
ppc_md.hpte_updatepp = beat_lpar_hpte_updatepp;
|
|
ppc_md.hpte_updateboltedpp = beat_lpar_hpte_updateboltedpp;
|
|
ppc_md.hpte_insert = beat_lpar_hpte_insert;
|
|
ppc_md.hpte_remove = beat_lpar_hpte_remove;
|
|
ppc_md.hpte_clear_all = beat_lpar_hptab_clear;
|
|
}
|
|
}
|