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Add a macro which verifies that a 64-bit value is a valid effective

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address as defined by the cpu's Implemented Effective Address bits.
This commit is contained in:
scw 2002-07-11 21:21:58 +00:00
parent c56faa76d8
commit 14013f679d
1 changed files with 17 additions and 2 deletions
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19
sys/arch/sh5/include/cpu.h
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@ -1,4 +1,4 @@
/* $NetBSD: cpu.h,v 1.2 2002/07/11 14:10:39 scw Exp $ */
/* $NetBSD: cpu.h,v 1.3 2002/07/11 21:21:58 scw Exp $ */
/*
* Copyright 2002 Wasabi Systems, Inc.
@ -104,11 +104,26 @@
#define SH5_KSEG0_SIZE 0x20000000
#define SH5_KSEG1_SIZE 0x20000000
/*
* Default to NEFF == 32 if port-specific code doesn't define it
*/
#ifndef SH5_NEFF_BITS
#define SH5_NEFF_BITS 32
#endif
/*
* This hairy macro evaluates true if (register_t)`eff' is a valid
* effective address for the CPU's Implemented Effective Address space.
*/
#if SH5_NEFF_BITS < 64
#define SH5_EFF_IS_VALID(eff) (((((eff) & (1ULL << 63)) ? \
((eff) ^ 0xffffffff00000000ULL) : (eff)) & \
~((1ULL << SH5_NEFF_BITS) - 1)) == 0)
#else
#define SH5_EFF_IS_VALID(eff) 1 /* Everything's valid in this case */
#endif
#ifndef SH5_ASID_BITS
#define SH5_ASID_BITS 8
#endif