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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
15/***************************************************************************
16 *
17 * These definitions simplify the ugly declarations necessary for GOT
18 * definitions.
19 *
20 * Stolen from prepboot/bootldr.h, (C) 1998 Gabriel Paubert, paubert@iram.es
21 *
Heiko Schocher161e4ae2010-06-17 07:01:40 +020022 * Uses r12 to access the GOT
wdenkd62589d2002-08-20 21:10:12 +000023 */
24
25#define START_GOT \
26 .section ".got2","aw"; \
27.LCTOC1 = .+32768
28
29#define END_GOT \
30 .text
31
32#define GET_GOT \
33 bl 1f ; \
34 .text 2 ; \
350: .long .LCTOC1-1f ; \
36 .text ; \
Joakim Tjernlund0f8aa152010-01-19 14:41:56 +0100371: mflr r12 ; \
38 lwz r0,0b-1b(r12) ; \
39 add r12,r0,r12 ;
wdenkd62589d2002-08-20 21:10:12 +000040
41#define GOT_ENTRY(NAME) .L_ ## NAME = . - .LCTOC1 ; .long NAME
42
Joakim Tjernlund0f8aa152010-01-19 14:41:56 +010043#define GOT(NAME) .L_ ## NAME (r12)
wdenkd62589d2002-08-20 21:10:12 +000044
45
46/***************************************************************************
47 * Register names
48 */
49#define r0 0
50#define r1 1
51#define r2 2
52#define r3 3
53#define r4 4
54#define r5 5
55#define r6 6
56#define r7 7
57#define r8 8
58#define r9 9
59#define r10 10
60#define r11 11
61#define r12 12
62#define r13 13
63#define r14 14
64#define r15 15
65#define r16 16
66#define r17 17
67#define r18 18
68#define r19 19
69#define r20 20
70#define r21 21
71#define r22 22
72#define r23 23
73#define r24 24
74#define r25 25
75#define r26 26
76#define r27 27
77#define r28 28
78#define r29 29
79#define r30 30
80#define r31 31
81
82
Masahiro Yamadad622ac32014-12-15 23:26:31 +090083#if defined(CONFIG_8xx)
wdenkd62589d2002-08-20 21:10:12 +000084
85/* Some special registers */
86
87#define ICR 148 /* Interrupt Cause Register (37-44) */
88#define DER 149
89#define COUNTA 150 /* Breakpoint Counter (37-44) */
90#define COUNTB 151 /* Breakpoint Counter (37-44) */
91#define LCTRL1 156 /* Load/Store Support (37-40) */
92#define LCTRL2 157 /* Load/Store Support (37-41) */
93#define ICTRL 158
94
Masahiro Yamadad622ac32014-12-15 23:26:31 +090095#endif /* CONFIG_8xx */
wdenkd62589d2002-08-20 21:10:12 +000096
wdenk0db5bca2003-03-31 17:27:09 +000097
98#if defined(CONFIG_5xx)
99/* Some special purpose registers */
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200100#define DER 149 /* Debug Enable Register */
101#define COUNTA 150 /* Breakpoint Counter */
102#define COUNTB 151 /* Breakpoint Counter */
103#define LCTRL1 156 /* Load/Store Support */
104#define LCTRL2 157 /* Load/Store Support */
wdenk0db5bca2003-03-31 17:27:09 +0000105#define ICTRL 158 /* I-Bus Support Control Register */
106#define EID 81
107#endif /* CONFIG_5xx */
108
wdenkd62589d2002-08-20 21:10:12 +0000109#if defined(CONFIG_8xx)
110
111/* Registers in the processor's internal memory map that we use.
112*/
113#define SYPCR 0x00000004
114#define BR0 0x00000100
115#define OR0 0x00000104
116#define BR1 0x00000108
117#define OR1 0x0000010c
118#define BR2 0x00000110
119#define OR2 0x00000114
120#define BR3 0x00000118
121#define OR3 0x0000011c
122#define BR4 0x00000120
123#define OR4 0x00000124
124
125#define MAR 0x00000164
126#define MCR 0x00000168
127#define MAMR 0x00000170
128#define MBMR 0x00000174
129#define MSTAT 0x00000178
130#define MPTPR 0x0000017a
131#define MDR 0x0000017c
132
133#define TBSCR 0x00000200
134#define TBREFF0 0x00000204
135
136#define PLPRCR 0x00000284
137
Masahiro Yamada58dac322014-03-05 17:40:10 +0900138#elif defined(CONFIG_MPC8260)
wdenkd62589d2002-08-20 21:10:12 +0000139
140#define HID2 1011
141
142#define HID0_IFEM (1<<7)
143
144#define HID0_ICE_BITPOS 16
145#define HID0_DCE_BITPOS 17
146
147#define IM_REGBASE 0x10000
148#define IM_SYPCR (IM_REGBASE+0x0004)
149#define IM_SWSR (IM_REGBASE+0x000e)
150#define IM_BR0 (IM_REGBASE+0x0100)
151#define IM_OR0 (IM_REGBASE+0x0104)
152#define IM_BR1 (IM_REGBASE+0x0108)
153#define IM_OR1 (IM_REGBASE+0x010c)
154#define IM_BR2 (IM_REGBASE+0x0110)
155#define IM_OR2 (IM_REGBASE+0x0114)
156#define IM_MPTPR (IM_REGBASE+0x0184)
157#define IM_PSDMR (IM_REGBASE+0x0190)
158#define IM_PSRT (IM_REGBASE+0x019c)
159#define IM_IMMR (IM_REGBASE+0x01a8)
160#define IM_SCCR (IM_REGBASE+0x0c80)
161
Wolfgang Denkd6ed3222013-05-11 03:00:50 +0000162#elif defined(CONFIG_MPC5xxx)
wdenk945af8d2003-07-16 21:53:01 +0000163
164#define HID0_ICE_BITPOS 16
165#define HID0_DCE_BITPOS 17
166
wdenkd62589d2002-08-20 21:10:12 +0000167#endif
168
169#define curptr r2
170
171#define SYNC \
172 sync; \
173 isync
174
175/*
176 * Macros for storing registers into and loading registers from
177 * exception frames.
178 */
179#define SAVE_GPR(n, base) stw n,GPR0+4*(n)(base)
180#define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base)
181#define SAVE_4GPRS(n, base) SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
182#define SAVE_8GPRS(n, base) SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
183#define SAVE_10GPRS(n, base) SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
184#define REST_GPR(n, base) lwz n,GPR0+4*(n)(base)
185#define REST_2GPRS(n, base) REST_GPR(n, base); REST_GPR(n+1, base)
186#define REST_4GPRS(n, base) REST_2GPRS(n, base); REST_2GPRS(n+2, base)
187#define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base)
188#define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base)
189
190/*
191 * GCC sometimes accesses words at negative offsets from the stack
192 * pointer, although the SysV ABI says it shouldn't. To cope with
193 * this, we leave this much untouched space on the stack on exception
194 * entry.
195 */
196#define STACK_UNDERHEAD 64
197
198/*
199 * Exception entry code. This code runs with address translation
200 * turned off, i.e. using physical addresses.
201 * We assume sprg3 has the physical address of the current
202 * task's thread_struct.
203 */
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200204#define EXCEPTION_PROLOG(reg1, reg2) \
wdenkd62589d2002-08-20 21:10:12 +0000205 mtspr SPRG0,r20; \
206 mtspr SPRG1,r21; \
207 mfcr r20; \
208 subi r21,r1,INT_FRAME_SIZE+STACK_UNDERHEAD; /* alloc exc. frame */\
209 stw r20,_CCR(r21); /* save registers */ \
210 stw r22,GPR22(r21); \
211 stw r23,GPR23(r21); \
212 mfspr r20,SPRG0; \
213 stw r20,GPR20(r21); \
214 mfspr r22,SPRG1; \
215 stw r22,GPR21(r21); \
216 mflr r20; \
217 stw r20,_LINK(r21); \
218 mfctr r22; \
219 stw r22,_CTR(r21); \
220 mfspr r20,XER; \
221 stw r20,_XER(r21); \
Rafal Jaworowskicc3023b2007-07-19 17:12:28 +0200222 mfspr r20, DAR_DEAR; \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200223 stw r20,_DAR(r21); \
224 mfspr r22,reg1; \
225 mfspr r23,reg2; \
wdenkd62589d2002-08-20 21:10:12 +0000226 stw r0,GPR0(r21); \
227 stw r1,GPR1(r21); \
228 stw r2,GPR2(r21); \
229 stw r1,0(r21); \
230 mr r1,r21; /* set new kernel sp */ \
231 SAVE_4GPRS(3, r21);
232/*
233 * Note: code which follows this uses cr0.eq (set if from kernel),
234 * r21, r22 (SRR0), and r23 (SRR1).
235 */
236
237/*
wdenkd62589d2002-08-20 21:10:12 +0000238 * Exception vectors.
239 *
240 * The data words for `hdlr' and `int_return' are initialized with
241 * OFFSET values only; they must be relocated first before they can
242 * be used!
243 */
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100244#define COPY_EE(d, s) rlwimi d,s,0,16,16
245#define NOCOPY(d, s)
246#define EXC_XFER_TEMPLATE(label, hdlr, msr, copyee) \
247 bl 1f; \
2481: mflr r20; \
249 lwz r20,(.L_ ## label)-1b+8(r20); \
250 mtlr r20; \
251 li r20,msr; \
252 copyee(r20,r23); \
wdenkd62589d2002-08-20 21:10:12 +0000253 rlwimi r20,r23,0,25,25; \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200254 blrl; \
wdenkd62589d2002-08-20 21:10:12 +0000255.L_ ## label : \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200256 .long hdlr - _start + _START_OFFSET; \
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100257 .long int_return - _start + _START_OFFSET; \
258 .long transfer_to_handler - _start + _START_OFFSET
259
260#define STD_EXCEPTION(n, label, hdlr) \
261 . = n; \
262label: \
263 EXCEPTION_PROLOG(SRR0, SRR1); \
264 addi r3,r1,STACK_FRAME_OVERHEAD; \
265 EXC_XFER_TEMPLATE(label, hdlr, MSR_KERNEL, NOCOPY) \
wdenkd62589d2002-08-20 21:10:12 +0000266
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200267#define CRIT_EXCEPTION(n, label, hdlr) \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200268 . = n; \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200269label: \
Rafal Jaworowski02032e82007-06-22 14:58:04 +0200270 EXCEPTION_PROLOG(CSRR0, CSRR1); \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200271 addi r3,r1,STACK_FRAME_OVERHEAD; \
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100272 EXC_XFER_TEMPLATE(label, hdlr, \
273 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
wdenkd62589d2002-08-20 21:10:12 +0000274
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200275#define MCK_EXCEPTION(n, label, hdlr) \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200276 . = n; \
Grzegorz Bernackiefa35cf2007-06-15 11:19:28 +0200277label: \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200278 EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
Wolfgang Denk83b4cfa2007-06-20 18:14:24 +0200279 addi r3,r1,STACK_FRAME_OVERHEAD; \
Joakim Tjernlundfc4e1882010-01-19 14:41:55 +0100280 EXC_XFER_TEMPLATE(label, hdlr, \
281 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
wdenkd62589d2002-08-20 21:10:12 +0000282
283#endif /* __PPC_ASM_TMPL__ */