From bf4981a00636347ddcef3fc008e4dd979380a851 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Thu, 19 Mar 2015 15:15:20 +1100 Subject: powerpc: Remove the celleb support The celleb code has seen no actual development for ~7 years. We (maintainers) have no access to test hardware, and it is highly likely the code has bit-rotted. As far as we're aware the hardware was never widely available, and is certainly no longer available, and no one on the list has shown any interest in it over the years. So remove it. If anyone has one and cares please speak up. Signed-off-by: Michael Ellerman Acked-by: Benjamin Herrenschmidt Acked-by: Jeremy Kerr --- arch/powerpc/platforms/cell/beat_htab.c | 445 -------------------------------- 1 file changed, 445 deletions(-) delete mode 100644 arch/powerpc/platforms/cell/beat_htab.c (limited to 'arch/powerpc/platforms/cell/beat_htab.c') diff --git a/arch/powerpc/platforms/cell/beat_htab.c b/arch/powerpc/platforms/cell/beat_htab.c deleted file mode 100644 index bee9232fe619..000000000000 --- a/arch/powerpc/platforms/cell/beat_htab.c +++ /dev/null @@ -1,445 +0,0 @@ -/* - * "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 -#include - -#include -#include -#include -#include -#include - -#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_RAW_SPINLOCK(beat_htab_lock); - -static inline unsigned int beat_read_mask(unsigned hpte_group) -{ - unsigned long rmask = 0; - u64 hpte_v[5]; - - 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 vpn, unsigned long pa, - unsigned long rflags, unsigned long vflags, - int psize, int apsize, int ssize) -{ - unsigned long lpar_rc; - u64 hpte_v, hpte_r, slot; - - 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(vpn, psize, apsize, MMU_SEGSIZE_256M) | - vflags | HPTE_V_VALID; - hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; - - if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); - - if (rflags & _PAGE_NO_CACHE) - hpte_r &= ~HPTE_R_M; - - raw_spin_lock(&beat_htab_lock); - lpar_rc = beat_read_mask(hpte_group); - if (lpar_rc == 0) { - if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW(" full\n"); - raw_spin_unlock(&beat_htab_lock); - return -1; - } - - lpar_rc = beat_insert_htab_entry(0, hpte_group, lpar_rc << 48, - hpte_v, hpte_r, &slot); - raw_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; - unsigned long lpar_rc; - u64 dword[5]; - - 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; - u64 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 vpn, - int psize, int apsize, - int ssize, unsigned long flags) -{ - unsigned long lpar_rc; - u64 dummy0, dummy1; - unsigned long want_v; - - want_v = hpte_encode_avpn(vpn, psize, MMU_SEGSIZE_256M); - - DBG_LOW(" update: " - "avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ", - want_v & HPTE_V_AVPN, slot, psize, newpp); - - raw_spin_lock(&beat_htab_lock); - dummy0 = beat_lpar_hpte_getword0(slot); - if ((dummy0 & ~0x7FUL) != (want_v & ~0x7FUL)) { - DBG_LOW("not found !\n"); - raw_spin_unlock(&beat_htab_lock); - return -1; - } - - lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, &dummy0, - &dummy1); - raw_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 vpn, int psize) -{ - unsigned long hash; - unsigned long i, j; - long slot; - unsigned long want_v, hpte_v; - - hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, MMU_SEGSIZE_256M); - want_v = hpte_encode_avpn(vpn, 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 vpn; - unsigned long lpar_rc, slot, vsid; - u64 dummy0, dummy1; - - vsid = get_kernel_vsid(ea, MMU_SEGSIZE_256M); - vpn = hpt_vpn(ea, vsid, MMU_SEGSIZE_256M); - - raw_spin_lock(&beat_htab_lock); - slot = beat_lpar_hpte_find(vpn, psize); - BUG_ON(slot == -1); - - lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, - &dummy0, &dummy1); - raw_spin_unlock(&beat_htab_lock); - - BUG_ON(lpar_rc != 0); -} - -static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, - int psize, int apsize, - int ssize, int local) -{ - unsigned long want_v; - unsigned long lpar_rc; - u64 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_avpn(vpn, psize, MMU_SEGSIZE_256M); - - raw_spin_lock_irqsave(&beat_htab_lock, flags); - dummy1 = beat_lpar_hpte_getword0(slot); - - if ((dummy1 & ~0x7FUL) != (want_v & ~0x7FUL)) { - DBG_LOW("not found !\n"); - raw_spin_unlock_irqrestore(&beat_htab_lock, flags); - return; - } - - lpar_rc = beat_write_htab_entry(0, slot, 0, 0, HPTE_V_VALID, 0, - &dummy1, &dummy2); - raw_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 vpn, unsigned long pa, - unsigned long rflags, unsigned long vflags, - int psize, int apsize, int ssize) -{ - unsigned long lpar_rc; - u64 hpte_v, hpte_r, slot; - - if (vflags & HPTE_V_SECONDARY) - return -1; - - if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW("hpte_insert(group=%lx, vpn=%016lx, pa=%016lx, " - "rflags=%lx, vflags=%lx, psize=%d)\n", - hpte_group, vpn, pa, rflags, vflags, psize); - - hpte_v = hpte_encode_v(vpn, psize, apsize, MMU_SEGSIZE_256M) | - vflags | HPTE_V_VALID; - hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; - - if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); - - if (rflags & _PAGE_NO_CACHE) - hpte_r &= ~HPTE_R_M; - - /* 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 vpn, - int psize, int apsize, - int ssize, unsigned long flags) -{ - unsigned long lpar_rc; - unsigned long want_v; - unsigned long pss; - - want_v = hpte_encode_avpn(vpn, psize, MMU_SEGSIZE_256M); - pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc[psize]; - - 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 vpn, - int psize, int apsize, - int ssize, int local) -{ - unsigned long want_v; - unsigned long lpar_rc; - unsigned long pss; - - DBG_LOW(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", - slot, vpn, psize, local); - want_v = hpte_encode_avpn(vpn, psize, MMU_SEGSIZE_256M); - pss = (psize == MMU_PAGE_4K) ? -1UL : mmu_psize_defs[psize].penc[psize]; - - 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; - } -} -- cgit v1.2.1