* (C) Copyright 2000-2002
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
/*
#ifndef __PPC_ASM_TMPL__
#define __PPC_ASM_TMPL__
+#include <config.h>
+
/***************************************************************************
*
* These definitions simplify the ugly declarations necessary for GOT
*
*
- * Uses r14 to access the GOT
+ * Uses r12 to access the GOT
*/
#define START_GOT \
.text 2 ; \
0: .long .LCTOC1-1f ; \
.text ; \
-1: mflr r14 ; \
- lwz r0,0b-1b(r14) ; \
- add r14,r0,r14 ;
+1: mflr r12 ; \
+ lwz r0,0b-1b(r12) ; \
+ add r12,r0,r12 ;
#define GOT_ENTRY(NAME) .L_ ## NAME = . - .LCTOC1 ; .long NAME
-#define GOT(NAME) .L_ ## NAME (r14)
+#define GOT(NAME) .L_ ## NAME (r12)
/***************************************************************************
#define r31 31
-#if defined(CONFIG_8xx) || defined(CONFIG_MPC824X)
+#if defined(CONFIG_8xx)
/* Some special registers */
#define LCTRL2 157 /* Load/Store Support (37-41) */
#define ICTRL 158
-#endif /* CONFIG_8xx, CONFIG_MPC824X */
+#endif /* CONFIG_8xx */
#if defined(CONFIG_5xx)
/* Some special purpose registers */
-#define DER 149 /* Debug Enable Register */
-#define COUNTA 150 /* Breakpoint Counter */
-#define COUNTB 151 /* Breakpoint Counter */
-#define LCTRL1 156 /* Load/Store Support */
-#define LCTRL2 157 /* Load/Store Support */
+#define DER 149 /* Debug Enable Register */
+#define COUNTA 150 /* Breakpoint Counter */
+#define COUNTB 151 /* Breakpoint Counter */
+#define LCTRL1 156 /* Load/Store Support */
+#define LCTRL2 157 /* Load/Store Support */
#define ICTRL 158 /* I-Bus Support Control Register */
#define EID 81
#endif /* CONFIG_5xx */
#define PLPRCR 0x00000284
-#elif defined(CONFIG_8260)
+#elif defined(CONFIG_MPC8260)
#define HID2 1011
#define IM_IMMR (IM_REGBASE+0x01a8)
#define IM_SCCR (IM_REGBASE+0x0c80)
-#elif defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8220)
+#elif defined(CONFIG_MPC5xxx)
#define HID0_ICE_BITPOS 16
#define HID0_DCE_BITPOS 17
* We assume sprg3 has the physical address of the current
* task's thread_struct.
*/
-#define EXCEPTION_PROLOG \
+#define EXCEPTION_PROLOG(reg1, reg2) \
mtspr SPRG0,r20; \
mtspr SPRG1,r21; \
mfcr r20; \
stw r22,_CTR(r21); \
mfspr r20,XER; \
stw r20,_XER(r21); \
- mfspr r22,SRR0; \
- mfspr r23,SRR1; \
+ mfspr r20, DAR_DEAR; \
+ stw r20,_DAR(r21); \
+ mfspr r22,reg1; \
+ mfspr r23,reg2; \
stw r0,GPR0(r21); \
stw r1,GPR1(r21); \
stw r2,GPR2(r21); \
* r21, r22 (SRR0), and r23 (SRR1).
*/
-/*
- * Critical exception entry code. This is just like the other exception
- * code except that it uses SRR2 and SRR3 instead of SRR0 and SRR1.
- */
-#define CRITICAL_EXCEPTION_PROLOG \
- mtspr SPRG0,r20; \
- mtspr SPRG1,r21; \
- mfcr r20; \
- subi r21,r1,INT_FRAME_SIZE+STACK_UNDERHEAD; /* alloc exc. frame */\
- stw r20,_CCR(r21); /* save registers */ \
- stw r22,GPR22(r21); \
- stw r23,GPR23(r21); \
- mfspr r20,SPRG0; \
- stw r20,GPR20(r21); \
- mfspr r22,SPRG1; \
- stw r22,GPR21(r21); \
- mflr r20; \
- stw r20,_LINK(r21); \
- mfctr r22; \
- stw r22,_CTR(r21); \
- mfspr r20,XER; \
- stw r20,_XER(r21); \
- mfspr r22,990; /* SRR2 */ \
- mfspr r23,991; /* SRR3 */ \
- stw r0,GPR0(r21); \
- stw r1,GPR1(r21); \
- stw r2,GPR2(r21); \
- stw r1,0(r21); \
- mr r1,r21; /* set new kernel sp */ \
- SAVE_4GPRS(3, r21);
-/*
- * Note: code which follows this uses cr0.eq (set if from kernel),
- * r21, r22 (SRR2), and r23 (SRR3).
- */
-
/*
* Exception vectors.
*
* OFFSET values only; they must be relocated first before they can
* be used!
*/
-#define STD_EXCEPTION(n, label, hdlr) \
- . = n; \
-label: \
- EXCEPTION_PROLOG; \
- lwz r3,GOT(transfer_to_handler); \
- mtlr r3; \
- addi r3,r1,STACK_FRAME_OVERHEAD; \
- li r20,MSR_KERNEL; \
+#define COPY_EE(d, s) rlwimi d,s,0,16,16
+#define NOCOPY(d, s)
+
+#ifdef CONFIG_E500
+#define EXC_XFER_TEMPLATE(n, label, hdlr, msr, copyee) \
+ stw r22,_NIP(r21); \
+ stw r23,_MSR(r21); \
+ li r23,n; \
+ stw r23,TRAP(r21); \
+ li r20,msr; \
+ copyee(r20,r23); \
+ rlwimi r20,r23,0,25,25; \
+ mtmsr r20; \
+ bl 1f; \
+1: mflr r23; \
+ addis r23,r23,(hdlr - 1b)@ha; \
+ addi r23,r23,(hdlr - 1b)@l; \
+ b transfer_to_handler
+
+#define STD_EXCEPTION(n, label, hdlr) \
+.align 4; \
+label: \
+ EXCEPTION_PROLOG(SRR0, SRR1); \
+ addi r3,r1,STACK_FRAME_OVERHEAD; \
+ EXC_XFER_TEMPLATE(n, label, hdlr, MSR_KERNEL, NOCOPY) \
+
+#define CRIT_EXCEPTION(n, label, hdlr) \
+.align 4; \
+label: \
+ EXCEPTION_PROLOG(CSRR0, CSRR1); \
+ addi r3,r1,STACK_FRAME_OVERHEAD; \
+ EXC_XFER_TEMPLATE(n, label, hdlr, \
+ MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
+
+#define MCK_EXCEPTION(n, label, hdlr) \
+.align 4; \
+label: \
+ EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
+ addi r3,r1,STACK_FRAME_OVERHEAD; \
+ EXC_XFER_TEMPLATE(n, label, hdlr, \
+ MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
+
+#else /* !E500 */
+
+#define EXC_XFER_TEMPLATE(label, hdlr, msr, copyee) \
+ bl 1f; \
+1: mflr r20; \
+ lwz r20,(.L_ ## label)-1b+8(r20); \
+ mtlr r20; \
+ li r20,msr; \
+ copyee(r20,r23); \
rlwimi r20,r23,0,25,25; \
- blrl ; \
+ blrl; \
.L_ ## label : \
- .long hdlr - _start + EXC_OFF_SYS_RESET; \
- .long int_return - _start + EXC_OFF_SYS_RESET
-
-
-#define CRIT_EXCEPTION(n, label, hdlr) \
- . = n; \
-label: \
- CRITICAL_EXCEPTION_PROLOG; \
- lwz r3,GOT(transfer_to_handler); \
- mtlr r3; \
- addi r3,r1,STACK_FRAME_OVERHEAD; \
- li r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)); \
- rlwimi r20,r23,0,25,25; \
- blrl ; \
-.L_ ## label : \
- .long hdlr - _start + EXC_OFF_SYS_RESET; \
- .long crit_return - _start + EXC_OFF_SYS_RESET
-
+ .long hdlr - _start + _START_OFFSET; \
+ .long int_return - _start + _START_OFFSET; \
+ .long transfer_to_handler - _start + _START_OFFSET
+
+#define STD_EXCEPTION(n, label, hdlr) \
+ . = n; \
+label: \
+ EXCEPTION_PROLOG(SRR0, SRR1); \
+ addi r3,r1,STACK_FRAME_OVERHEAD; \
+ EXC_XFER_TEMPLATE(label, hdlr, MSR_KERNEL, NOCOPY) \
+
+#define CRIT_EXCEPTION(n, label, hdlr) \
+ . = n; \
+label: \
+ EXCEPTION_PROLOG(CSRR0, CSRR1); \
+ addi r3,r1,STACK_FRAME_OVERHEAD; \
+ EXC_XFER_TEMPLATE(label, hdlr, \
+ MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
+
+#define MCK_EXCEPTION(n, label, hdlr) \
+ . = n; \
+label: \
+ EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
+ addi r3,r1,STACK_FRAME_OVERHEAD; \
+ EXC_XFER_TEMPLATE(label, hdlr, \
+ MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
+
+#endif /* !E500 */
#endif /* __PPC_ASM_TMPL__ */
projects / J-u-boot.git / blobdiff