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/*
* arch/ppc/kernel/ppc_asm.h
*
* Definitions used by various bits of low-level assembly code on PowerPC.
*
* Copyright (C) 1995-1999 Gary Thomas, Paul Mackerras, Cort Dougan.
*
* 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.
*/
#include <linux/config.h>
#include "ppc_asm.tmpl"
#include "ppc_defs.h"
/*
* 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)
#define SAVE_FPR(n, base) stfd n,THREAD_FPR0+8*(n)(base)
#define SAVE_2FPRS(n, base) SAVE_FPR(n, base); SAVE_FPR(n+1, base)
#define SAVE_4FPRS(n, base) SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
#define SAVE_8FPRS(n, base) SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
#define SAVE_16FPRS(n, base) SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
#define SAVE_32FPRS(n, base) SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
#define REST_FPR(n, base) lfd n,THREAD_FPR0+8*(n)(base)
#define REST_2FPRS(n, base) REST_FPR(n, base); REST_FPR(n+1, base)
#define REST_4FPRS(n, base) REST_2FPRS(n, base); REST_2FPRS(n+2, base)
#define REST_8FPRS(n, base) REST_4FPRS(n, base); REST_4FPRS(n+4, base)
#define REST_16FPRS(n, base) REST_8FPRS(n, base); REST_8FPRS(n+8, base)
#define REST_32FPRS(n, base) REST_16FPRS(n, base); REST_16FPRS(n+16, base)
/*
* Once a version of gas that understands the AltiVec instructions
* is freely available, we can do this the normal way... - paulus
*/
#define LVX(r,a,b) .long (31<<26)+((r)<<21)+((a)<<16)+((b)<<11)+(103<<1)
#define STVX(r,a,b) .long (31<<26)+((r)<<21)+((a)<<16)+((b)<<11)+(231<<1)
#define MFVSCR(r) .long (4<<26)+((r)<<21)+(770<<1)
#define MTVSCR(r) .long (4<<26)+((r)<<11)+(802<<1)
#define SAVE_VR(n,b,base) li b,THREAD_VR0+(16*(n)); STVX(n,b,base)
#define SAVE_2VR(n,b,base) SAVE_VR(n,b,base); SAVE_VR(n+1,b,base)
#define SAVE_4VR(n,b,base) SAVE_2VR(n,b,base); SAVE_2VR(n+2,b,base)
#define SAVE_8VR(n,b,base) SAVE_4VR(n,b,base); SAVE_4VR(n+4,b,base)
#define SAVE_16VR(n,b,base) SAVE_8VR(n,b,base); SAVE_8VR(n+8,b,base)
#define SAVE_32VR(n,b,base) SAVE_16VR(n,b,base); SAVE_16VR(n+16,b,base)
#define REST_VR(n,b,base) li b,THREAD_VR0+(16*(n)); LVX(n,b,base)
#define REST_2VR(n,b,base) REST_VR(n,b,base); REST_VR(n+1,b,base)
#define REST_4VR(n,b,base) REST_2VR(n,b,base); REST_2VR(n+2,b,base)
#define REST_8VR(n,b,base) REST_4VR(n,b,base); REST_4VR(n+4,b,base)
#define REST_16VR(n,b,base) REST_8VR(n,b,base); REST_8VR(n+8,b,base)
#define REST_32VR(n,b,base) REST_16VR(n,b,base); REST_16VR(n+16,b,base)
#ifdef CONFIG_PPC601_SYNC_FIX
#define SYNC \
sync; \
isync
#else
#define SYNC
#endif
/*
* This instruction is not implemented on the PPC 603 or 601; however, on
* the 403GCX and 405GP tlbia IS defined and tlbie is not.
* All of these instructions exist in the 8xx, they have magical powers,
* and they must be used.
*/
#if !defined(CONFIG_4xx) && !defined(CONFIG_8xx)
#define tlbia \
li r4,1024; \
mtctr r4; \
lis r4,KERNELBASE@h; \
0: tlbie r4; \
addi r4,r4,0x1000; \
bdnz 0b
#endif
/*
* On APUS (Amiga PowerPC cpu upgrade board), we don't know the
* physical base address of RAM at compile time.
*/
#define tophys(rd,rs) \
0: addis rd,rs,-KERNELBASE@h; \
.section ".vtop_fixup","aw"; \
.align 1; \
.long 0b; \
.previous
#define tovirt(rd,rs) \
0: addis rd,rs,KERNELBASE@h; \
.section ".ptov_fixup","aw"; \
.align 1; \
.long 0b; \
.previous
/*
* On 64-bit cpus, we use the rfid instruction instead of rfi, but
* we then have to make sure we preserve the top 32 bits except for
* the 64-bit mode bit, which we clear.
*/
#ifdef CONFIG_PPC64BRIDGE
#define FIX_SRR1(ra, rb) \
mr rb,ra; \
mfmsr ra; \
clrldi ra,ra,1; /* turn off 64-bit mode */ \
rldimi ra,rb,0,32
#define RFI .long 0x4c000024 /* rfid instruction */
#define MTMSRD(r) .long (0x7c000164 + ((r) << 21)) /* mtmsrd */
#define CLR_TOP32(r) rlwinm (r),(r),0,0,31 /* clear top 32 bits */
#else
#define FIX_SRR1(ra, rb)
#define RFI rfi
#define MTMSRD(r) mtmsr r
#define CLR_TOP32(r)
#endif /* CONFIG_PPC64BRIDGE */
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