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wdenkd62589d2002-08-20 21:10:12 +00001/*
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
wdenkd62589d2002-08-20 21:10:12 +00006 */
7
8/*
9 * This file contains all the macros and symbols which define
10 * a PowerPC assembly language environment.
11 */
12#ifndef __PPC_ASM_TMPL__
13#define __PPC_ASM_TMPL__
14
Scott Wood96d2bb92015-04-07 20:20:00 -050015#include <config.h>
16
wdenkd62589d2002-08-20 21:10:12 +000017/***************************************************************************
18 *
19 * These definitions simplify the ugly declarations necessary for GOT
20 * definitions.
21 *
22 * Stolen from prepboot/bootldr.h, (C) 1998 Gabriel Paubert, paubert@iram.es
23 *
Heiko Schocher161e4ae2010-06-17 07:01:40 +020024 * Uses r12 to access the GOT
wdenkd62589d2002-08-20 21:10:12 +000025 */
26
27#define START_GOT \
28 .section ".got2","aw"; \
29.LCTOC1 = .+32768
30
31#define END_GOT \
32 .text
33
34#define GET_GOT \
35 bl 1f ; \
36 .text 2 ; \
370: .long .LCTOC1-1f ; \
38 .text ; \
Joakim Tjernlund0f8aa152010-01-19 14:41:56 +0100391: mflr r12 ; \
40 lwz r0,0b-1b(r12) ; \
41 add r12,r0,r12 ;
wdenkd62589d2002-08-20 21:10:12 +000042
43#define GOT_ENTRY(NAME) .L_ ## NAME = . - .LCTOC1 ; .long NAME
44
Joakim Tjernlund0f8aa152010-01-19 14:41:56 +010045#define GOT(NAME) .L_ ## NAME (r12)
wdenkd62589d2002-08-20 21:10:12 +000046
47
48/***************************************************************************
49 * Register names
50 */
51#define r0 0
52#define r1 1
53#define r2 2
54#define r3 3
55#define r4 4
56#define r5 5
57#define r6 6
58#define r7 7
59#define r8 8
60#define r9 9
61#define r10 10
62#define r11 11
63#define r12 12
64#define r13 13
65#define r14 14
66#define r15 15
67#define r16 16
68#define r17 17
69#define r18 18
70#define r19 19
71#define r20 20
72#define r21 21
73#define r22 22
74#define r23 23
75#define r24 24
76#define r25 25
77#define r26 26
78#define r27 27
79#define r28 28
80#define r29 29
81#define r30 30
82#define r31 31
83
Christophe Leroy907208c2017-07-06 10:23:22 +020084#if defined(CONFIG_8xx)
85
86/* Some special registers */
87
88#define ICR 148 /* Interrupt Cause Register (37-44) */
89#define DER 149
90#define COUNTA 150 /* Breakpoint Counter (37-44) */
91#define COUNTB 151 /* Breakpoint Counter (37-44) */
92#define LCTRL1 156 /* Load/Store Support (37-40) */
93#define LCTRL2 157 /* Load/Store Support (37-41) */
94#define ICTRL 158
95
96#endif /* CONFIG_8xx */
97
98
99#if defined(CONFIG_8xx)
100
101/* Registers in the processor's internal memory map that we use.
102*/
103#define SYPCR 0x00000004
104#define BR0 0x00000100
105#define OR0 0x00000104
106#define BR1 0x00000108
107#define OR1 0x0000010c
108#define BR2 0x00000110
109#define OR2 0x00000114
110#define BR3 0x00000118
111#define OR3 0x0000011c
112#define BR4 0x00000120
113#define OR4 0x00000124
114
115#define MAR 0x00000164
116#define MCR 0x00000168
117#define MAMR 0x00000170
118#define MBMR 0x00000174
119#define MSTAT 0x00000178
120#define MPTPR 0x0000017a
121#define MDR 0x0000017c
122
123#define TBSCR 0x00000200
124#define TBREFF0 0x00000204
125
126#define PLPRCR 0x00000284
127
128#endif
129
wdenkd62589d2002-08-20 21:10:12 +0000130#define curptr r2
131
132#define SYNC \
133 sync; \
134 isync
135
136/*
137 * Macros for storing registers into and loading registers from
138 * exception frames.
139 */
140#define SAVE_GPR(n, base) stw n,GPR0+4*(n)(base)
141#define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base)
142#define SAVE_4GPRS(n, base) SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
143#define SAVE_8GPRS(n, base) SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
144#define SAVE_10GPRS(n, base) SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
145#define REST_GPR(n, base) lwz n,GPR0+4*(n)(base)
146#define REST_2GPRS(n, base) REST_GPR(n, base); REST_GPR(n+1, base)
147#define REST_4GPRS(n, base) REST_2GPRS(n, base); REST_2GPRS(n+2, base)
148#define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base)
149#define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base)
150
151/*
152 * GCC sometimes accesses words at negative offsets from the stack
153 * pointer, although the SysV ABI says it shouldn't. To cope with
154 * this, we leave this much untouched space on the stack on exception
155 * entry.
156 */
157#define STACK_UNDERHEAD 64
158
159/*
160 * Exception entry code. This code runs with address translation
161 * turned off, i.e. using physical addresses.
162 * We assume sprg3 has the physical address of the current
163 * task's thread_struct.
164 */
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200165#define EXCEPTION_PROLOG(reg1, reg2) \
wdenkd62589d2002-08-20 21:10:12 +0000166 mtspr SPRG0,r20; \
167 mtspr SPRG1,r21; \
168 mfcr r20; \
169 subi r21,r1,INT_FRAME_SIZE+STACK_UNDERHEAD; /* alloc exc. frame */\
170 stw r20,_CCR(r21); /* save registers */ \
171 stw r22,GPR22(r21); \
172 stw r23,GPR23(r21); \
173 mfspr r20,SPRG0; \
174 stw r20,GPR20(r21); \
175 mfspr r22,SPRG1; \
176 stw r22,GPR21(r21); \
177 mflr r20; \
178 stw r20,_LINK(r21); \
179 mfctr r22; \
180 stw r22,_CTR(r21); \
181 mfspr r20,XER; \
182 stw r20,_XER(r21); \
Rafal Jaworowskicc3023b2007-07-19 17:12:28 +0200183 mfspr r20, DAR_DEAR; \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200184 stw r20,_DAR(r21); \
185 mfspr r22,reg1; \
186 mfspr r23,reg2; \
wdenkd62589d2002-08-20 21:10:12 +0000187 stw r0,GPR0(r21); \
188 stw r1,GPR1(r21); \
189 stw r2,GPR2(r21); \
190 stw r1,0(r21); \
191 mr r1,r21; /* set new kernel sp */ \
192 SAVE_4GPRS(3, r21);
193/*
194 * Note: code which follows this uses cr0.eq (set if from kernel),
195 * r21, r22 (SRR0), and r23 (SRR1).
196 */
197
198/*
wdenkd62589d2002-08-20 21:10:12 +0000199 * Exception vectors.
200 *
201 * The data words for `hdlr' and `int_return' are initialized with
202 * OFFSET values only; they must be relocated first before they can
203 * be used!
204 */
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100205#define COPY_EE(d, s) rlwimi d,s,0,16,16
206#define NOCOPY(d, s)
Scott Wood96d2bb92015-04-07 20:20:00 -0500207
208#ifdef CONFIG_E500
209#define EXC_XFER_TEMPLATE(n, label, hdlr, msr, copyee) \
210 stw r22,_NIP(r21); \
211 stw r23,_MSR(r21); \
212 li r23,n; \
213 stw r23,TRAP(r21); \
214 li r20,msr; \
215 copyee(r20,r23); \
216 rlwimi r20,r23,0,25,25; \
217 mtmsr r20; \
218 bl 1f; \
2191: mflr r23; \
220 addis r23,r23,(hdlr - 1b)@ha; \
221 addi r23,r23,(hdlr - 1b)@l; \
222 b transfer_to_handler
223
224#define STD_EXCEPTION(n, label, hdlr) \
mario.six@gdsys.cc50689462016-04-05 15:05:37 +0200225.align 4; \
Scott Wood96d2bb92015-04-07 20:20:00 -0500226label: \
227 EXCEPTION_PROLOG(SRR0, SRR1); \
228 addi r3,r1,STACK_FRAME_OVERHEAD; \
229 EXC_XFER_TEMPLATE(n, label, hdlr, MSR_KERNEL, NOCOPY) \
230
231#define CRIT_EXCEPTION(n, label, hdlr) \
mario.six@gdsys.cc50689462016-04-05 15:05:37 +0200232.align 4; \
Scott Wood96d2bb92015-04-07 20:20:00 -0500233label: \
234 EXCEPTION_PROLOG(CSRR0, CSRR1); \
235 addi r3,r1,STACK_FRAME_OVERHEAD; \
236 EXC_XFER_TEMPLATE(n, label, hdlr, \
237 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
238
239#define MCK_EXCEPTION(n, label, hdlr) \
mario.six@gdsys.cc50689462016-04-05 15:05:37 +0200240.align 4; \
Scott Wood96d2bb92015-04-07 20:20:00 -0500241label: \
242 EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
243 addi r3,r1,STACK_FRAME_OVERHEAD; \
244 EXC_XFER_TEMPLATE(n, label, hdlr, \
245 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
246
247#else /* !E500 */
248
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100249#define EXC_XFER_TEMPLATE(label, hdlr, msr, copyee) \
250 bl 1f; \
2511: mflr r20; \
252 lwz r20,(.L_ ## label)-1b+8(r20); \
253 mtlr r20; \
254 li r20,msr; \
255 copyee(r20,r23); \
wdenkd62589d2002-08-20 21:10:12 +0000256 rlwimi r20,r23,0,25,25; \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200257 blrl; \
wdenkd62589d2002-08-20 21:10:12 +0000258.L_ ## label : \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200259 .long hdlr - _start + _START_OFFSET; \
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100260 .long int_return - _start + _START_OFFSET; \
261 .long transfer_to_handler - _start + _START_OFFSET
262
263#define STD_EXCEPTION(n, label, hdlr) \
264 . = n; \
265label: \
266 EXCEPTION_PROLOG(SRR0, SRR1); \
267 addi r3,r1,STACK_FRAME_OVERHEAD; \
268 EXC_XFER_TEMPLATE(label, hdlr, MSR_KERNEL, NOCOPY) \
wdenkd62589d2002-08-20 21:10:12 +0000269
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200270#define CRIT_EXCEPTION(n, label, hdlr) \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200271 . = n; \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200272label: \
Rafal Jaworowski02032e82007-06-22 14:58:04 +0200273 EXCEPTION_PROLOG(CSRR0, CSRR1); \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200274 addi r3,r1,STACK_FRAME_OVERHEAD; \
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100275 EXC_XFER_TEMPLATE(label, hdlr, \
276 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
wdenkd62589d2002-08-20 21:10:12 +0000277
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200278#define MCK_EXCEPTION(n, label, hdlr) \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200279 . = n; \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200280label: \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200281 EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200282 addi r3,r1,STACK_FRAME_OVERHEAD; \
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100283 EXC_XFER_TEMPLATE(label, hdlr, \
284 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
wdenkd62589d2002-08-20 21:10:12 +0000285
Scott Wood96d2bb92015-04-07 20:20:00 -0500286#endif /* !E500 */
wdenkd62589d2002-08-20 21:10:12 +0000287#endif /* __PPC_ASM_TMPL__ */