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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * OpenSPARC T2 Processor File: mmu_ptr_calc.s | |
5 | * Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
6 | * 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
7 | * | |
8 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | * | |
23 | * For the avoidance of doubt, and except that if any non-GPL license | |
24 | * choice is available it will apply instead, Sun elects to use only | |
25 | * the General Public License version 2 (GPLv2) at this time for any | |
26 | * software where a choice of GPL license versions is made | |
27 | * available with the language indicating that GPLv2 or any later version | |
28 | * may be used, or where a choice of which version of the GPL is applied is | |
29 | * otherwise unspecified. | |
30 | * | |
31 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
32 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
33 | * have any questions. | |
34 | * | |
35 | * | |
36 | * ========== Copyright Header End ============================================ | |
37 | */ | |
38 | sllx %g6, 51, %g5 | |
39 | brnz,a %g5, 1f | |
40 | add %g7, 0x20, %g7 ! this executes only if branch taken | |
41 | ||
42 | 1: | |
43 | !%g1 = ldxa tsb_config | |
44 | ldxa [%g7] ASI_MMU_ZERO_CONTEXT_TSB_CONFIG, %g1 | |
45 | ||
46 | !%g2 = tsbsz = %g1 & 0xf | |
47 | and %g1, 0xf, %g2 | |
48 | ||
49 | !%g3 = pgsz = %g1 & 0x70 >> 4 | |
50 | and %g1, 0x70, %g3 | |
51 | srlx %g3, 4, %g3 | |
52 | ||
53 | !tsb64[63:40] = 0 | |
54 | !tsb64[39:13+tsbsz] = tsb_base[39:13+tsbsz] | |
55 | !tsb64[12+tsbsz:0] = 0 | |
56 | ! | |
57 | !tsb64 = ({24'b0,27'b1,13'b0} << (tsbsz)) & tsb_base | |
58 | ! = (0xffffffff000 << (tsbsz)) & tsb_base | |
59 | ! ((~0xfff) << (tsbsz)) & tsb_base | |
60 | ||
61 | !%g4 = 0x000000ffffffe000 | |
62 | not %g0, %g4 | |
63 | srlx %g4, 36, %g4 | |
64 | sllx %g4, 13, %g4 | |
65 | ||
66 | !%g4 = sllx %g2 | |
67 | sllx %g4, %g2, %g4 | |
68 | ||
69 | !%g4 = and %g1 %g4 | |
70 | and %g1, %g4, %g4 | |
71 | ||
72 | !va_mask = {(8+tsbsz)'b1,4'b0} | |
73 | ! = (0xffffff >> (15-tsbsz) | |
74 | ||
75 | !%g5 = 0xffffff | |
76 | set 0xffffff, %g5 | |
77 | ||
78 | !%g1 = 15 | |
79 | mov 15, %g1 | |
80 | ||
81 | !%g1 = sub %g1 %g2 | |
82 | sub %g1, %g2, %g1 | |
83 | ||
84 | !%g5 = srax %g5 %g1 | |
85 | srax %g5, %g1, %g1 | |
86 | ||
87 | !va_1 = va >> (13+3*pgsz) | |
88 | ||
89 | !%g5 = mulx %g3 | |
90 | mulx %g3, 3, %g5 | |
91 | ||
92 | !%g5 = add %g5 13 | |
93 | add %g5, 13, %g5 | |
94 | ||
95 | !%g1 = srax %g6 %g5 | |
96 | srax %g6, %g5, %g5 | |
97 | ||
98 | !va64 = va_1 & va_mask | |
99 | ||
100 | !%g1 = and %g1 %g5 | |
101 | and %g1, %g5, %g1 | |
102 | ||
103 | ! va64 << 4 | |
104 | !%g1 = sllx 4, %g1 | |
105 | sllx %g1, 4, %g1 | |
106 | ||
107 | !tsb_pointer = (tsb64 | VA64) | |
108 | ||
109 | !%g1 = or %g1 %g4 | |
110 | or %g1, %g4, %g1 |