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1/*
2 * tie-asm.h -- compile-time HAL assembler definitions dependent on CORE & TIE
3 *
4 * NOTE: This header file is not meant to be included directly.
5 */
6
7/* This header file contains assembly-language definitions (assembly
8 macros, etc.) for this specific Xtensa processor's TIE extensions
9 and options. It is customized to this Xtensa processor configuration.
10
11 Copyright (c) 1999-2015 Cadence Design Systems Inc.
12
13 Permission is hereby granted, free of charge, to any person obtaining
14 a copy of this software and associated documentation files (the
15 "Software"), to deal in the Software without restriction, including
16 without limitation the rights to use, copy, modify, merge, publish,
17 distribute, sublicense, and/or sell copies of the Software, and to
18 permit persons to whom the Software is furnished to do so, subject to
19 the following conditions:
20
21 The above copyright notice and this permission notice shall be included
22 in all copies or substantial portions of the Software.
23
24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
27 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
28 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
29 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
30 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
31
32#ifndef _XTENSA_CORE_TIE_ASM_H
33#define _XTENSA_CORE_TIE_ASM_H
34
35/* Selection parameter values for save-area save/restore macros: */
36/* Option vs. TIE: */
37#define XTHAL_SAS_TIE 0x0001 /* custom extension or coprocessor */
38#define XTHAL_SAS_OPT 0x0002 /* optional (and not a coprocessor) */
39#define XTHAL_SAS_ANYOT 0x0003 /* both of the above */
40/* Whether used automatically by compiler: */
41#define XTHAL_SAS_NOCC 0x0004 /* not used by compiler w/o special opts/code */
42#define XTHAL_SAS_CC 0x0008 /* used by compiler without special opts/code */
43#define XTHAL_SAS_ANYCC 0x000C /* both of the above */
44/* ABI handling across function calls: */
45#define XTHAL_SAS_CALR 0x0010 /* caller-saved */
46#define XTHAL_SAS_CALE 0x0020 /* callee-saved */
47#define XTHAL_SAS_GLOB 0x0040 /* global across function calls (in thread) */
48#define XTHAL_SAS_ANYABI 0x0070 /* all of the above three */
49/* Misc */
50#define XTHAL_SAS_ALL 0xFFFF /* include all default NCP contents */
51#define XTHAL_SAS3(optie,ccuse,abi) ( ((optie) & XTHAL_SAS_ANYOT) \
52 | ((ccuse) & XTHAL_SAS_ANYCC) \
53 | ((abi) & XTHAL_SAS_ANYABI) )
54
55
56 /*
57 * Macro to store all non-coprocessor (extra) custom TIE and optional state
58 * (not including zero-overhead loop registers).
59 * Required parameters:
60 * ptr Save area pointer address register (clobbered)
61 * (register must contain a 4 byte aligned address).
62 * at1..at4 Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
63 * registers are clobbered, the remaining are unused).
64 * Optional parameters:
65 * continue If macro invoked as part of a larger store sequence, set to 1
66 * if this is not the first in the sequence. Defaults to 0.
67 * ofs Offset from start of larger sequence (from value of first ptr
68 * in sequence) at which to store. Defaults to next available space
69 * (or 0 if <continue> is 0).
70 * select Select what category(ies) of registers to store, as a bitmask
71 * (see XTHAL_SAS_xxx constants). Defaults to all registers.
72 * alloc Select what category(ies) of registers to allocate; if any
73 * category is selected here that is not in <select>, space for
74 * the corresponding registers is skipped without doing any store.
75 */
76 .macro xchal_ncp_store ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
77 xchal_sa_start \continue, \ofs
78 // Optional global registers used by default by the compiler:
79 .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
80 xchal_sa_align \ptr, 0, 1020, 4, 4
81 rur.THREADPTR \at1 // threadptr option
82 s32i \at1, \ptr, .Lxchal_ofs_+0
83 .set .Lxchal_ofs_, .Lxchal_ofs_ + 4
84 .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
85 xchal_sa_align \ptr, 0, 1020, 4, 4
86 .set .Lxchal_ofs_, .Lxchal_ofs_ + 4
87 .endif
88 // Optional caller-saved registers used by default by the compiler:
89 .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
90 xchal_sa_align \ptr, 0, 1016, 4, 4
91 rsr.ACCLO \at1 // MAC16 option
92 s32i \at1, \ptr, .Lxchal_ofs_+0
93 rsr.ACCHI \at1 // MAC16 option
94 s32i \at1, \ptr, .Lxchal_ofs_+4
95 .set .Lxchal_ofs_, .Lxchal_ofs_ + 8
96 .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
97 xchal_sa_align \ptr, 0, 1016, 4, 4
98 .set .Lxchal_ofs_, .Lxchal_ofs_ + 8
99 .endif
100 // Optional caller-saved registers not used by default by the compiler:
101 .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
102 xchal_sa_align \ptr, 0, 1000, 4, 4
103 rsr.BR \at1 // boolean option
104 s32i \at1, \ptr, .Lxchal_ofs_+0
105 rsr.SCOMPARE1 \at1 // conditional store option
106 s32i \at1, \ptr, .Lxchal_ofs_+4
107 rsr.M0 \at1 // MAC16 option
108 s32i \at1, \ptr, .Lxchal_ofs_+8
109 rsr.M1 \at1 // MAC16 option
110 s32i \at1, \ptr, .Lxchal_ofs_+12
111 rsr.M2 \at1 // MAC16 option
112 s32i \at1, \ptr, .Lxchal_ofs_+16
113 rsr.M3 \at1 // MAC16 option
114 s32i \at1, \ptr, .Lxchal_ofs_+20
115 .set .Lxchal_ofs_, .Lxchal_ofs_ + 24
116 .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
117 xchal_sa_align \ptr, 0, 1000, 4, 4
118 .set .Lxchal_ofs_, .Lxchal_ofs_ + 24
119 .endif
120 .endm // xchal_ncp_store
121
122 /*
123 * Macro to load all non-coprocessor (extra) custom TIE and optional state
124 * (not including zero-overhead loop registers).
125 * Required parameters:
126 * ptr Save area pointer address register (clobbered)
127 * (register must contain a 4 byte aligned address).
128 * at1..at4 Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
129 * registers are clobbered, the remaining are unused).
130 * Optional parameters:
131 * continue If macro invoked as part of a larger load sequence, set to 1
132 * if this is not the first in the sequence. Defaults to 0.
133 * ofs Offset from start of larger sequence (from value of first ptr
134 * in sequence) at which to load. Defaults to next available space
135 * (or 0 if <continue> is 0).
136 * select Select what category(ies) of registers to load, as a bitmask
137 * (see XTHAL_SAS_xxx constants). Defaults to all registers.
138 * alloc Select what category(ies) of registers to allocate; if any
139 * category is selected here that is not in <select>, space for
140 * the corresponding registers is skipped without doing any load.
141 */
142 .macro xchal_ncp_load ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
143 xchal_sa_start \continue, \ofs
144 // Optional global registers used by default by the compiler:
145 .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
146 xchal_sa_align \ptr, 0, 1020, 4, 4
147 l32i \at1, \ptr, .Lxchal_ofs_+0
148 wur.THREADPTR \at1 // threadptr option
149 .set .Lxchal_ofs_, .Lxchal_ofs_ + 4
150 .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
151 xchal_sa_align \ptr, 0, 1020, 4, 4
152 .set .Lxchal_ofs_, .Lxchal_ofs_ + 4
153 .endif
154 // Optional caller-saved registers used by default by the compiler:
155 .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
156 xchal_sa_align \ptr, 0, 1016, 4, 4
157 l32i \at1, \ptr, .Lxchal_ofs_+0
158 wsr.ACCLO \at1 // MAC16 option
159 l32i \at1, \ptr, .Lxchal_ofs_+4
160 wsr.ACCHI \at1 // MAC16 option
161 .set .Lxchal_ofs_, .Lxchal_ofs_ + 8
162 .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
163 xchal_sa_align \ptr, 0, 1016, 4, 4
164 .set .Lxchal_ofs_, .Lxchal_ofs_ + 8
165 .endif
166 // Optional caller-saved registers not used by default by the compiler:
167 .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
168 xchal_sa_align \ptr, 0, 1000, 4, 4
169 l32i \at1, \ptr, .Lxchal_ofs_+0
170 wsr.BR \at1 // boolean option
171 l32i \at1, \ptr, .Lxchal_ofs_+4
172 wsr.SCOMPARE1 \at1 // conditional store option
173 l32i \at1, \ptr, .Lxchal_ofs_+8
174 wsr.M0 \at1 // MAC16 option
175 l32i \at1, \ptr, .Lxchal_ofs_+12
176 wsr.M1 \at1 // MAC16 option
177 l32i \at1, \ptr, .Lxchal_ofs_+16
178 wsr.M2 \at1 // MAC16 option
179 l32i \at1, \ptr, .Lxchal_ofs_+20
180 wsr.M3 \at1 // MAC16 option
181 .set .Lxchal_ofs_, .Lxchal_ofs_ + 24
182 .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
183 xchal_sa_align \ptr, 0, 1000, 4, 4
184 .set .Lxchal_ofs_, .Lxchal_ofs_ + 24
185 .endif
186 .endm // xchal_ncp_load
187
188
189#define XCHAL_NCP_NUM_ATMPS 1
190
191#define XCHAL_SA_NUM_ATMPS 1
192
193#endif /*_XTENSA_CORE_TIE_ASM_H*/
194