/* * ========== Copyright Header Begin ========================================== * * OpenSPARC T2 Processor File: mmu_ptr_calc.s * Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved * 4150 Network Circle, Santa Clara, California 95054, U.S.A. * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * 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; version 2 of the License. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * For the avoidance of doubt, and except that if any non-GPL license * choice is available it will apply instead, Sun elects to use only * the General Public License version 2 (GPLv2) at this time for any * software where a choice of GPL license versions is made * available with the language indicating that GPLv2 or any later version * may be used, or where a choice of which version of the GPL is applied is * otherwise unspecified. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * * ========== Copyright Header End ============================================ */ sllx %g6, 51, %g5 brnz,a %g5, 1f add %g7, 0x20, %g7 ! this executes only if branch taken 1: !%g1 = ldxa tsb_config ldxa [%g7] ASI_MMU_ZERO_CONTEXT_TSB_CONFIG, %g1 !%g2 = tsbsz = %g1 & 0xf and %g1, 0xf, %g2 !%g3 = pgsz = %g1 & 0x70 >> 4 and %g1, 0x70, %g3 srlx %g3, 4, %g3 !tsb64[63:40] = 0 !tsb64[39:13+tsbsz] = tsb_base[39:13+tsbsz] !tsb64[12+tsbsz:0] = 0 ! !tsb64 = ({24'b0,27'b1,13'b0} << (tsbsz)) & tsb_base ! = (0xffffffff000 << (tsbsz)) & tsb_base ! ((~0xfff) << (tsbsz)) & tsb_base !%g4 = 0x000000ffffffe000 not %g0, %g4 srlx %g4, 36, %g4 sllx %g4, 13, %g4 !%g4 = sllx %g2 sllx %g4, %g2, %g4 !%g4 = and %g1 %g4 and %g1, %g4, %g4 !va_mask = {(8+tsbsz)'b1,4'b0} ! = (0xffffff >> (15-tsbsz) !%g5 = 0xffffff set 0xffffff, %g5 !%g1 = 15 mov 15, %g1 !%g1 = sub %g1 %g2 sub %g1, %g2, %g1 !%g5 = srax %g5 %g1 srax %g5, %g1, %g1 !va_1 = va >> (13+3*pgsz) !%g5 = mulx %g3 mulx %g3, 3, %g5 !%g5 = add %g5 13 add %g5, 13, %g5 !%g1 = srax %g6 %g5 srax %g6, %g5, %g5 !va64 = va_1 & va_mask !%g1 = and %g1 %g5 and %g1, %g5, %g1 ! va64 << 4 !%g1 = sllx 4, %g1 sllx %g1, 4, %g1 !tsb_pointer = (tsb64 | VA64) !%g1 = or %g1 %g4 or %g1, %g4, %g1