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freebsd-nq/sys/powerpc/include/sr.h

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Complete rework of the PowerPC pmap and a number of other bits in the early boot sequence. The new pmap.c is based on NetBSD's newer pmap.c (for the mpc6xx processors) which is 70% faster than the older code that the original pmap.c was based on. It has also been based on the framework established by jake's initial sparc64 pmap.c. There is no change to how far the kernel gets (it makes it to the mountroot prompt in psim) but the new pmap code is a lot cleaner. Obtained from: NetBSD (pmap code)
2002-02-14 01:39:11 +00:00
/*
* Copyright (C) 2002 Benno Rice.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_SR_H_
style(9)
2002-02-18 06:24:55 +00:00
#define _MACHINE_SR_H_
Complete rework of the PowerPC pmap and a number of other bits in the early boot sequence. The new pmap.c is based on NetBSD's newer pmap.c (for the mpc6xx processors) which is 70% faster than the older code that the original pmap.c was based on. It has also been based on the framework established by jake's initial sparc64 pmap.c. There is no change to how far the kernel gets (it makes it to the mountroot prompt in psim) but the new pmap code is a lot cleaner. Obtained from: NetBSD (pmap code)
2002-02-14 01:39:11 +00:00
/*
* Bit definitions for segment registers.
*
* PowerPC Microprocessor Family: The Programming Environments for 32-bit
* Microprocessors, section 2.3.5
*/
#define SR_TYPE 0x80000000 /* Type selector */
#define SR_KS 0x40000000 /* Supervisor-state protection key */
#define SR_KP 0x20000000 /* User-state protection key */
style(9)
2002-02-18 06:24:55 +00:00
#define SR_N 0x10000000 /* No-execute protection */
Complete rework of the PowerPC pmap and a number of other bits in the early boot sequence. The new pmap.c is based on NetBSD's newer pmap.c (for the mpc6xx processors) which is 70% faster than the older code that the original pmap.c was based on. It has also been based on the framework established by jake's initial sparc64 pmap.c. There is no change to how far the kernel gets (it makes it to the mountroot prompt in psim) but the new pmap code is a lot cleaner. Obtained from: NetBSD (pmap code)
2002-02-14 01:39:11 +00:00
#define SR_VSID_MASK 0x00ffffff /* Virtual Segment ID mask */
Cleaned up param.h: - culled long-dead #define's - segment register defs moved to sr.h - NPMAPS moved to pmap.h - KERNBASE moved to vmparam.h - removed include of <machine/cpu.h> and fixed src files that relied on this. Modifying segment register code no longer causes gcc rebuilds :-)
2004-02-11 07:27:34 +00:00
/* Kernel segment register usage */
Increase kernel VA from 256Mb to 512Mb by shifting the segment used for user copyinout down to 12, and keeping segments 13/14 for kernel VA. It would be nice to have more available, but segments lower than this are reserved for either memory or 1:1 mapped device i/o, and seg 15 is OpenFirmware ROM. Also, the effort to keep OpenFirmware available for callbacks limits the use of VA-mapped segments. Fortunately UMA_MD_SMALL_ALLOC takes away a lot of VM pressure. Obtained from: NetBSD
2004-03-02 06:49:21 +00:00
#define USER_SR 12
#define KERNEL_SR 13
#define KERNEL2_SR 14
Cleaned up param.h: - culled long-dead #define's - segment register defs moved to sr.h - NPMAPS moved to pmap.h - KERNBASE moved to vmparam.h - removed include of <machine/cpu.h> and fixed src files that relied on this. Modifying segment register code no longer causes gcc rebuilds :-)
2004-02-11 07:27:34 +00:00
#define KERNEL_VSIDBITS 0xfffff
#define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR)
Increase kernel VA from 256Mb to 512Mb by shifting the segment used for user copyinout down to 12, and keeping segments 13/14 for kernel VA. It would be nice to have more available, but segments lower than this are reserved for either memory or 1:1 mapped device i/o, and seg 15 is OpenFirmware ROM. Also, the effort to keep OpenFirmware available for callbacks limits the use of VA-mapped segments. Fortunately UMA_MD_SMALL_ALLOC takes away a lot of VM pressure. Obtained from: NetBSD
2004-03-02 06:49:21 +00:00
#define KERNEL2_SEGMENT (0xfffff0 + KERNEL2_SR)
Cleaned up param.h: - culled long-dead #define's - segment register defs moved to sr.h - NPMAPS moved to pmap.h - KERNBASE moved to vmparam.h - removed include of <machine/cpu.h> and fixed src files that relied on this. Modifying segment register code no longer causes gcc rebuilds :-)
2004-02-11 07:27:34 +00:00
#define EMPTY_SEGMENT 0xfffff0
#define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT))
#define SEGMENT_LENGTH 0x10000000
#define SEGMENT_MASK 0xf0000000
Complete rework of the PowerPC pmap and a number of other bits in the early boot sequence. The new pmap.c is based on NetBSD's newer pmap.c (for the mpc6xx processors) which is 70% faster than the older code that the original pmap.c was based on. It has also been based on the framework established by jake's initial sparc64 pmap.c. There is no change to how far the kernel gets (it makes it to the mountroot prompt in psim) but the new pmap code is a lot cleaner. Obtained from: NetBSD (pmap code)
2002-02-14 01:39:11 +00:00
#endif /* !_MACHINE_SR_H_ */
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