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Diffstat (limited to 'sys/powerpc/include/slb.h')
| -rw-r--r-- | sys/powerpc/include/slb.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sys/powerpc/include/slb.h b/sys/powerpc/include/slb.h new file mode 100644 index 0000000..a189987 --- /dev/null +++ b/sys/powerpc/include/slb.h @@ -0,0 +1,69 @@ +/*- + * Copyright (C) 2009 Nathan Whitehorn + * 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 THE AUTHOR ``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_SLB_H_ +#define _MACHINE_SLB_H_ + +/* + * Bit definitions for segment lookaside buffer entries. + * + * PowerPC Microprocessor Family: The Programming Environments for 64-bit + * Microprocessors, section 7.4.2.1 + * + * Note that these bitmasks are relative to the values for one of the two + * values for slbmte, slbmfee, and slbmfev, not the internal SLB + * representation. + */ + +#define SLBV_KS 0x0000000000000800UL /* Supervisor-state prot key */ +#define SLBV_KP 0x0000000000000400UL /* User-state prot key */ +#define SLBV_N 0x0000000000000200UL /* No-execute protection */ +#define SLBV_L 0x0000000000000100UL /* Large page selector */ +#define SLBV_CLASS 0x0000000000000080UL /* Class selector */ +#define SLBV_VSID_MASK 0xfffffffffffff000UL /* Virtual segment ID mask */ +#define SLBV_VSID_SHIFT 12 + +#define KERNEL_VSID_BIT 0x0000001000000000UL /* Bit set in all kernel VSIDs */ + +/* + * Shift large-page VSIDs one place left. At present, they are only used in the + * kernel direct map, and we already assume in the placement of KVA that the + * CPU cannot address more than 63 bits of memory. + */ +#define KERNEL_VSID(esid, large) (((uint64_t)(esid) << (large ? 1 : 0)) | KERNEL_VSID_BIT) + +#define SLBE_VALID 0x0000000008000000UL /* SLB entry valid */ +#define SLBE_INDEX_MASK 0x0000000000000fffUL /* SLB index mask*/ +#define SLBE_ESID_MASK 0xfffffffff0000000UL /* Effective segment ID mask */ +#define SLBE_ESID_SHIFT 28 + +struct slb { + uint64_t slbv; + uint64_t slbe; +}; + +#endif /* !_MACHINE_SLB_H_ */ |
