patch-2.4.19 linux-2.4.19/arch/ppc64/kernel/ppc_asm.h

• Lines: 118
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ppc64/kernel/ppc_asm.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ppc64/kernel/ppc_asm.h linux-2.4.19/arch/ppc64/kernel/ppc_asm.h
@@ -0,0 +1,117 @@
+/*
+ * arch/ppc64/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 <asm/ppc_asm.tmpl>
+#include "ppc_defs.h"
+
+/*
+ * Macros for storing registers into and loading registers from
+ * exception frames.
+ */
+#define SAVE_GPR(n, base)	std	n,GPR0+8*(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)	ld	n,GPR0+8*(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)
+
+#define CHECKANYINT(ra,rb)			\
+	mfspr	rb,SPRG3;		/* Get Paca address */\
+	ld	ra,PACALPPACA+LPPACAANYINT(rb); /* Get pending interrupt flags */\
+	cmpldi	0,ra,0;
+
+/* Macros to adjust thread priority for Iseries hardware multithreading */
+#define HMT_LOW		or 1,1,1
+#define HMT_MEDIUM	or 2,2,2
+#define HMT_HIGH	or 3,3,3
+
+/* Insert the high 32 bits of the MSR into what will be the new
+   MSR (via SRR1 and rfid)  This preserves the MSR.SF and MSR.ISF
+   bits. */
+
+#define FIX_SRR1(ra, rb)	\
+	mr	rb,ra;		\
+	mfmsr	ra;		\
+	rldimi	ra,rb,0,32
+
+#define CLR_TOP32(r)	rlwinm	(r),(r),0,0,31	/* clear top 32 bits */
+
+/* 
+ * LOADADDR( rn, name )
+ *   loads the address of 'name' into 'rn'
+ *
+ * LOADBASE( rn, name )
+ *   loads the address (less the low 16 bits) of 'name' into 'rn'
+ *   suitable for base+disp addressing
+ */
+#define LOADADDR(rn,name) \
+	lis	rn,name##@highest;	\
+	ori	rn,rn,name##@higher;	\
+	rldicr	rn,rn,32,31;		\
+	oris	rn,rn,name##@h;		\
+	ori	rn,rn,name##@l
+
+#define LOADBASE(rn,name) \
+	lis	rn,name@highest;	\
+	ori	rn,rn,name@higher;	\
+	rldicr	rn,rn,32,31;		\
+	oris	rn,rn,name@ha
+
+
+#define SET_REG_TO_CONST(reg, value)	         	\
+	lis     reg,(((value)>>48)&0xFFFF);             \
+	ori     reg,reg,(((value)>>32)&0xFFFF);         \
+	rldicr  reg,reg,32,31;                          \
+	oris    reg,reg,(((value)>>16)&0xFFFF);         \
+	ori     reg,reg,((value)&0xFFFF);
+
+#define SET_REG_TO_LABEL(reg, label)	         	\
+	lis     reg,(label)@highest;                    \
+	ori     reg,reg,(label)@higher;                 \
+	rldicr  reg,reg,32,31;                          \
+	oris    reg,reg,(label)@h;                      \
+	ori     reg,reg,(label)@l;
+
+
+/* PPPBBB - DRENG  If KERNELBASE is always 0xC0...,
+ * Then we can easily do this with one asm insn. -Peter
+ */
+#define tophys(rd,rs)                           \
+        lis     rd,((KERNELBASE>>48)&0xFFFF);   \
+        rldicr  rd,rd,32,31;                    \
+        sub     rd,rs,rd
+
+#define tovirt(rd,rs)                           \
+        lis     rd,((KERNELBASE>>48)&0xFFFF);   \
+        rldicr  rd,rd,32,31;                    \
+        add     rd,rs,rd
+