2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
9 * This file contains all the macros and symbols which define
10 * a PowerPC assembly language environment.
12 #ifndef __PPC_ASM_TMPL__
13 #define __PPC_ASM_TMPL__
17 /***************************************************************************
19 * These definitions simplify the ugly declarations necessary for GOT
22 * Stolen from prepboot/bootldr.h, (C) 1998 Gabriel Paubert, paubert@iram.es
24 * Uses r12 to access the GOT
28 .section ".got2","aw"; \
37 0: .long .LCTOC1-1f ; \
43 #define GOT_ENTRY(NAME) .L_ ## NAME = . - .LCTOC1 ; .long NAME
45 #define GOT(NAME) .L_ ## NAME (r12)
48 /***************************************************************************
85 #if defined(CONFIG_8xx)
87 /* Some special registers */
89 #define ICR 148 /* Interrupt Cause Register (37-44) */
91 #define COUNTA 150 /* Breakpoint Counter (37-44) */
92 #define COUNTB 151 /* Breakpoint Counter (37-44) */
93 #define LCTRL1 156 /* Load/Store Support (37-40) */
94 #define LCTRL2 157 /* Load/Store Support (37-41) */
97 #endif /* CONFIG_8xx */
100 #if defined(CONFIG_5xx)
101 /* Some special purpose registers */
102 #define DER 149 /* Debug Enable Register */
103 #define COUNTA 150 /* Breakpoint Counter */
104 #define COUNTB 151 /* Breakpoint Counter */
105 #define LCTRL1 156 /* Load/Store Support */
106 #define LCTRL2 157 /* Load/Store Support */
107 #define ICTRL 158 /* I-Bus Support Control Register */
109 #endif /* CONFIG_5xx */
111 #if defined(CONFIG_8xx)
113 /* Registers in the processor's internal memory map that we use.
115 #define SYPCR 0x00000004
116 #define BR0 0x00000100
117 #define OR0 0x00000104
118 #define BR1 0x00000108
119 #define OR1 0x0000010c
120 #define BR2 0x00000110
121 #define OR2 0x00000114
122 #define BR3 0x00000118
123 #define OR3 0x0000011c
124 #define BR4 0x00000120
125 #define OR4 0x00000124
127 #define MAR 0x00000164
128 #define MCR 0x00000168
129 #define MAMR 0x00000170
130 #define MBMR 0x00000174
131 #define MSTAT 0x00000178
132 #define MPTPR 0x0000017a
133 #define MDR 0x0000017c
135 #define TBSCR 0x00000200
136 #define TBREFF0 0x00000204
138 #define PLPRCR 0x00000284
140 #elif defined(CONFIG_MPC8260)
144 #define HID0_IFEM (1<<7)
146 #define HID0_ICE_BITPOS 16
147 #define HID0_DCE_BITPOS 17
149 #define IM_REGBASE 0x10000
150 #define IM_SYPCR (IM_REGBASE+0x0004)
151 #define IM_SWSR (IM_REGBASE+0x000e)
152 #define IM_BR0 (IM_REGBASE+0x0100)
153 #define IM_OR0 (IM_REGBASE+0x0104)
154 #define IM_BR1 (IM_REGBASE+0x0108)
155 #define IM_OR1 (IM_REGBASE+0x010c)
156 #define IM_BR2 (IM_REGBASE+0x0110)
157 #define IM_OR2 (IM_REGBASE+0x0114)
158 #define IM_MPTPR (IM_REGBASE+0x0184)
159 #define IM_PSDMR (IM_REGBASE+0x0190)
160 #define IM_PSRT (IM_REGBASE+0x019c)
161 #define IM_IMMR (IM_REGBASE+0x01a8)
162 #define IM_SCCR (IM_REGBASE+0x0c80)
164 #elif defined(CONFIG_MPC5xxx)
166 #define HID0_ICE_BITPOS 16
167 #define HID0_DCE_BITPOS 17
178 * Macros for storing registers into and loading registers from
181 #define SAVE_GPR(n, base) stw n,GPR0+4*(n)(base)
182 #define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base)
183 #define SAVE_4GPRS(n, base) SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
184 #define SAVE_8GPRS(n, base) SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
185 #define SAVE_10GPRS(n, base) SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
186 #define REST_GPR(n, base) lwz n,GPR0+4*(n)(base)
187 #define REST_2GPRS(n, base) REST_GPR(n, base); REST_GPR(n+1, base)
188 #define REST_4GPRS(n, base) REST_2GPRS(n, base); REST_2GPRS(n+2, base)
189 #define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base)
190 #define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base)
193 * GCC sometimes accesses words at negative offsets from the stack
194 * pointer, although the SysV ABI says it shouldn't. To cope with
195 * this, we leave this much untouched space on the stack on exception
198 #define STACK_UNDERHEAD 64
201 * Exception entry code. This code runs with address translation
202 * turned off, i.e. using physical addresses.
203 * We assume sprg3 has the physical address of the current
204 * task's thread_struct.
206 #define EXCEPTION_PROLOG(reg1, reg2) \
210 subi r21,r1,INT_FRAME_SIZE+STACK_UNDERHEAD; /* alloc exc. frame */\
211 stw r20,_CCR(r21); /* save registers */ \
212 stw r22,GPR22(r21); \
213 stw r23,GPR23(r21); \
215 stw r20,GPR20(r21); \
217 stw r22,GPR21(r21); \
219 stw r20,_LINK(r21); \
224 mfspr r20, DAR_DEAR; \
232 mr r1,r21; /* set new kernel sp */ \
235 * Note: code which follows this uses cr0.eq (set if from kernel),
236 * r21, r22 (SRR0), and r23 (SRR1).
242 * The data words for `hdlr' and `int_return' are initialized with
243 * OFFSET values only; they must be relocated first before they can
246 #define COPY_EE(d, s) rlwimi d,s,0,16,16
250 #define EXC_XFER_TEMPLATE(n, label, hdlr, msr, copyee) \
257 rlwimi r20,r23,0,25,25; \
261 addis r23,r23,(hdlr - 1b)@ha; \
262 addi r23,r23,(hdlr - 1b)@l; \
263 b transfer_to_handler
265 #define STD_EXCEPTION(n, label, hdlr) \
267 EXCEPTION_PROLOG(SRR0, SRR1); \
268 addi r3,r1,STACK_FRAME_OVERHEAD; \
269 EXC_XFER_TEMPLATE(n, label, hdlr, MSR_KERNEL, NOCOPY) \
271 #define CRIT_EXCEPTION(n, label, hdlr) \
273 EXCEPTION_PROLOG(CSRR0, CSRR1); \
274 addi r3,r1,STACK_FRAME_OVERHEAD; \
275 EXC_XFER_TEMPLATE(n, label, hdlr, \
276 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
278 #define MCK_EXCEPTION(n, label, hdlr) \
280 EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
281 addi r3,r1,STACK_FRAME_OVERHEAD; \
282 EXC_XFER_TEMPLATE(n, label, hdlr, \
283 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
287 #define EXC_XFER_TEMPLATE(label, hdlr, msr, copyee) \
290 lwz r20,(.L_ ## label)-1b+8(r20); \
294 rlwimi r20,r23,0,25,25; \
297 .long hdlr - _start + _START_OFFSET; \
298 .long int_return - _start + _START_OFFSET; \
299 .long transfer_to_handler - _start + _START_OFFSET
301 #define STD_EXCEPTION(n, label, hdlr) \
304 EXCEPTION_PROLOG(SRR0, SRR1); \
305 addi r3,r1,STACK_FRAME_OVERHEAD; \
306 EXC_XFER_TEMPLATE(label, hdlr, MSR_KERNEL, NOCOPY) \
308 #define CRIT_EXCEPTION(n, label, hdlr) \
311 EXCEPTION_PROLOG(CSRR0, CSRR1); \
312 addi r3,r1,STACK_FRAME_OVERHEAD; \
313 EXC_XFER_TEMPLATE(label, hdlr, \
314 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
316 #define MCK_EXCEPTION(n, label, hdlr) \
319 EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
320 addi r3,r1,STACK_FRAME_OVERHEAD; \
321 EXC_XFER_TEMPLATE(label, hdlr, \
322 MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
325 #endif /* __PPC_ASM_TMPL__ */