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

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/* -> /*- for license, minor formatting changes
2005-01-07 02:29:27 +00:00
/*-
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
Reduce KVA pressure on OEA64 systems running in bridge mode by mapping UMA segments at their physical addresses instead of into KVA. This emulates the direct mapping behavior of OEA32 in an ad-hoc way. To make this work properly required sharing the entire kernel PMAP with Open Firmware, so ofw_pmap is transformed into a stub on 64-bit CPUs. Also implement some more tweaks to get more mileage out of our limited amount of KVA, principally by extending KVA into segment 16 until the beginning of the first OFW mapping. Reported by: linimon
2010-02-20 16:23:29 +00:00
#define KERNEL3_SR 15
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
#define KERNEL_VSIDBITS 0xfffffUL
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_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
MFppc64: Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture.
2010-07-13 05:32:19 +00:00
#ifdef __powerpc64__
#define USER_ADDR 0xcffffffff0000000UL
#else
#define USER_ADDR ((uintptr_t)USER_SR << ADDR_SR_SHFT)
#endif
#define SEGMENT_LENGTH 0x10000000UL
#define SEGMENT_INVMASK 0x0fffffffUL
#define SEGMENT_MASK ~SEGMENT_INVMASK
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
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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