include/ppc_asm.tmpl - manifest_repos/bootloader - Git at Google

 /*
  * (C) Copyright 2000-2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 /*
  * This file contains all the macros and symbols which define
  * a PowerPC assembly language environment.
  */
 #ifndef	__PPC_ASM_TMPL__
 #define __PPC_ASM_TMPL__

 #include <config.h>

 /***************************************************************************
  *
  * These definitions simplify the ugly declarations necessary for GOT
  * definitions.
  *
  * Stolen from prepboot/bootldr.h, (C) 1998 Gabriel Paubert, paubert@iram.es
  *
  * Uses r12 to access the GOT
  */

 #define START_GOT			\
 	.section	".got2","aw";	\
 .LCTOC1 = .+32768

 #define END_GOT				\
 	.text

 #define GET_GOT				\
 	bl	1f		;	\
 	.text	2		;	\
 0:	.long	.LCTOC1-1f	;	\
 	.text			;	\
 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 (r12)


 /***************************************************************************
  * Register names
  */
 #define	r0	0
 #define	r1	1
 #define	r2	2
 #define	r3	3
 #define	r4	4
 #define	r5	5
 #define	r6	6
 #define	r7	7
 #define	r8	8
 #define	r9	9
 #define	r10	10
 #define	r11	11
 #define	r12	12
 #define	r13	13
 #define	r14	14
 #define	r15	15
 #define	r16	16
 #define	r17	17
 #define	r18	18
 #define	r19	19
 #define	r20	20
 #define	r21	21
 #define	r22	22
 #define	r23	23
 #define	r24	24
 #define	r25	25
 #define	r26	26
 #define	r27	27
 #define	r28	28
 #define	r29	29
 #define	r30	30
 #define	r31	31


 #if defined(CONFIG_8xx)

 /* Some special registers */

 #define ICR	148	/* Interrupt Cause Register (37-44) */
 #define DER	149
 #define COUNTA	150	/* Breakpoint Counter	    (37-44) */
 #define COUNTB	151	/* Breakpoint Counter	    (37-44) */
 #define LCTRL1	156	/* Load/Store Support	    (37-40) */
 #define LCTRL2	157	/* Load/Store Support	    (37-41) */
 #define ICTRL	158

 #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 ICTRL	158		/* I-Bus Support Control Register	*/
 #define EID	81
 #endif	/* CONFIG_5xx */

 #if defined(CONFIG_8xx)

 /* Registers in the processor's internal memory map that we use.
 */
 #define SYPCR	0x00000004
 #define BR0	0x00000100
 #define OR0	0x00000104
 #define BR1	0x00000108
 #define OR1	0x0000010c
 #define BR2	0x00000110
 #define OR2	0x00000114
 #define BR3	0x00000118
 #define OR3	0x0000011c
 #define BR4	0x00000120
 #define OR4	0x00000124

 #define MAR	0x00000164
 #define MCR	0x00000168
 #define MAMR	0x00000170
 #define MBMR	0x00000174
 #define MSTAT	0x00000178
 #define MPTPR	0x0000017a
 #define MDR	0x0000017c

 #define TBSCR	0x00000200
 #define TBREFF0	0x00000204

 #define PLPRCR	0x00000284

 #elif defined(CONFIG_MPC8260)

 #define HID2		1011

 #define HID0_IFEM	(1<<7)

 #define HID0_ICE_BITPOS	16
 #define HID0_DCE_BITPOS	17

 #define IM_REGBASE	0x10000
 #define IM_SYPCR	(IM_REGBASE+0x0004)
 #define IM_SWSR		(IM_REGBASE+0x000e)
 #define IM_BR0		(IM_REGBASE+0x0100)
 #define IM_OR0		(IM_REGBASE+0x0104)
 #define IM_BR1		(IM_REGBASE+0x0108)
 #define IM_OR1		(IM_REGBASE+0x010c)
 #define IM_BR2		(IM_REGBASE+0x0110)
 #define IM_OR2		(IM_REGBASE+0x0114)
 #define IM_MPTPR	(IM_REGBASE+0x0184)
 #define IM_PSDMR	(IM_REGBASE+0x0190)
 #define IM_PSRT		(IM_REGBASE+0x019c)
 #define IM_IMMR		(IM_REGBASE+0x01a8)
 #define IM_SCCR		(IM_REGBASE+0x0c80)

 #elif defined(CONFIG_MPC5xxx)

 #define HID0_ICE_BITPOS	16
 #define HID0_DCE_BITPOS	17

 #endif

 #define curptr r2

 #define SYNC \
 	sync; \
 	isync

 /*
  * Macros for storing registers into and loading registers from
  * exception frames.
  */
 #define SAVE_GPR(n, base)	stw	n,GPR0+4*(n)(base)
 #define SAVE_2GPRS(n, base)	SAVE_GPR(n, base); SAVE_GPR(n+1, base)
 #define SAVE_4GPRS(n, base)	SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
 #define SAVE_8GPRS(n, base)	SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
 #define SAVE_10GPRS(n, base)	SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
 #define REST_GPR(n, base)	lwz	n,GPR0+4*(n)(base)
 #define REST_2GPRS(n, base)	REST_GPR(n, base); REST_GPR(n+1, base)
 #define REST_4GPRS(n, base)	REST_2GPRS(n, base); REST_2GPRS(n+2, base)
 #define REST_8GPRS(n, base)	REST_4GPRS(n, base); REST_4GPRS(n+4, base)
 #define REST_10GPRS(n, base)	REST_8GPRS(n, base); REST_2GPRS(n+8, base)

 /*
  * GCC sometimes accesses words at negative offsets from the stack
  * pointer, although the SysV ABI says it shouldn't.  To cope with
  * this, we leave this much untouched space on the stack on exception
  * entry.
  */
 #define STACK_UNDERHEAD	64

 /*
  * Exception entry code.  This code runs with address translation
  * turned off, i.e. using physical addresses.
  * We assume sprg3 has the physical address of the current
  * task's thread_struct.
  */
 #define EXCEPTION_PROLOG(reg1, reg2)	\
 	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	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);	\
 	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 (SRR0), and r23 (SRR1).
  */

 /*
  * Exception vectors.
  *
  * The data words for `hdlr' and `int_return' are initialized with
  * OFFSET values only; they must be relocated first before they can
  * be used!
  */
 #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)				\
 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)				\
 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)				\
 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;						\
 .L_ ## label :						\
 	.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__ */
	/*
	* (C) Copyright 2000-2002
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	/*
	* This file contains all the macros and symbols which define
	* a PowerPC assembly language environment.
	*/
	#ifndef __PPC_ASM_TMPL__
	#define __PPC_ASM_TMPL__

	#include <config.h>

	/***************************************************************************
	*
	* These definitions simplify the ugly declarations necessary for GOT
	* definitions.
	*
	* Stolen from prepboot/bootldr.h, (C) 1998 Gabriel Paubert, paubert@iram.es
	*
	* Uses r12 to access the GOT
	*/

	#define START_GOT \
	.section ".got2","aw"; \
	.LCTOC1 = .+32768

	#define END_GOT \
	.text

	#define GET_GOT \
	bl 1f ; \
	.text 2 ; \
	0: .long .LCTOC1-1f ; \
	.text ; \
	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 (r12)


	/***************************************************************************
	* Register names
	*/
	#define r0 0
	#define r1 1
	#define r2 2
	#define r3 3
	#define r4 4
	#define r5 5
	#define r6 6
	#define r7 7
	#define r8 8
	#define r9 9
	#define r10 10
	#define r11 11
	#define r12 12
	#define r13 13
	#define r14 14
	#define r15 15
	#define r16 16
	#define r17 17
	#define r18 18
	#define r19 19
	#define r20 20
	#define r21 21
	#define r22 22
	#define r23 23
	#define r24 24
	#define r25 25
	#define r26 26
	#define r27 27
	#define r28 28
	#define r29 29
	#define r30 30
	#define r31 31


	#if defined(CONFIG_8xx)

	/* Some special registers */

	#define ICR 148 /* Interrupt Cause Register (37-44) */
	#define DER 149
	#define COUNTA 150 /* Breakpoint Counter (37-44) */
	#define COUNTB 151 /* Breakpoint Counter (37-44) */
	#define LCTRL1 156 /* Load/Store Support (37-40) */
	#define LCTRL2 157 /* Load/Store Support (37-41) */
	#define ICTRL 158

	#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 ICTRL 158 /* I-Bus Support Control Register */
	#define EID 81
	#endif /* CONFIG_5xx */

	#if defined(CONFIG_8xx)

	/* Registers in the processor's internal memory map that we use.
	*/
	#define SYPCR 0x00000004
	#define BR0 0x00000100
	#define OR0 0x00000104
	#define BR1 0x00000108
	#define OR1 0x0000010c
	#define BR2 0x00000110
	#define OR2 0x00000114
	#define BR3 0x00000118
	#define OR3 0x0000011c
	#define BR4 0x00000120
	#define OR4 0x00000124

	#define MAR 0x00000164
	#define MCR 0x00000168
	#define MAMR 0x00000170
	#define MBMR 0x00000174
	#define MSTAT 0x00000178
	#define MPTPR 0x0000017a
	#define MDR 0x0000017c

	#define TBSCR 0x00000200
	#define TBREFF0 0x00000204

	#define PLPRCR 0x00000284

	#elif defined(CONFIG_MPC8260)

	#define HID2 1011

	#define HID0_IFEM (1<<7)

	#define HID0_ICE_BITPOS 16
	#define HID0_DCE_BITPOS 17

	#define IM_REGBASE 0x10000
	#define IM_SYPCR (IM_REGBASE+0x0004)
	#define IM_SWSR (IM_REGBASE+0x000e)
	#define IM_BR0 (IM_REGBASE+0x0100)
	#define IM_OR0 (IM_REGBASE+0x0104)
	#define IM_BR1 (IM_REGBASE+0x0108)
	#define IM_OR1 (IM_REGBASE+0x010c)
	#define IM_BR2 (IM_REGBASE+0x0110)
	#define IM_OR2 (IM_REGBASE+0x0114)
	#define IM_MPTPR (IM_REGBASE+0x0184)
	#define IM_PSDMR (IM_REGBASE+0x0190)
	#define IM_PSRT (IM_REGBASE+0x019c)
	#define IM_IMMR (IM_REGBASE+0x01a8)
	#define IM_SCCR (IM_REGBASE+0x0c80)

	#elif defined(CONFIG_MPC5xxx)

	#define HID0_ICE_BITPOS 16
	#define HID0_DCE_BITPOS 17

	#endif

	#define curptr r2

	#define SYNC \
	sync; \
	isync

	/*
	* Macros for storing registers into and loading registers from
	* exception frames.
	*/
	#define SAVE_GPR(n, base) stw n,GPR0+4*(n)(base)
	#define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base)
	#define SAVE_4GPRS(n, base) SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
	#define SAVE_8GPRS(n, base) SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
	#define SAVE_10GPRS(n, base) SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
	#define REST_GPR(n, base) lwz n,GPR0+4*(n)(base)
	#define REST_2GPRS(n, base) REST_GPR(n, base); REST_GPR(n+1, base)
	#define REST_4GPRS(n, base) REST_2GPRS(n, base); REST_2GPRS(n+2, base)
	#define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base)
	#define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base)

	/*
	* GCC sometimes accesses words at negative offsets from the stack
	* pointer, although the SysV ABI says it shouldn't. To cope with
	* this, we leave this much untouched space on the stack on exception
	* entry.
	*/
	#define STACK_UNDERHEAD 64

	/*
	* Exception entry code. This code runs with address translation
	* turned off, i.e. using physical addresses.
	* We assume sprg3 has the physical address of the current
	* task's thread_struct.
	*/
	#define EXCEPTION_PROLOG(reg1, reg2) \
	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 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); \
	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 (SRR0), and r23 (SRR1).
	*/

	/*
	* Exception vectors.
	*
	* The data words for `hdlr' and `int_return' are initialized with
	* OFFSET values only; they must be relocated first before they can
	* be used!
	*/
	#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) \
	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) \
	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) \
	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; \
	.L_ ## label : \
	.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__ */