FreeBSD/Linux Kernel Cross Reference
sys/powerpc/include/slb.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * 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
    
    /*
     * Make a predictable 1:1 map from ESIDs to VSIDs for the kernel. Hash table
     * coverage is increased by swizzling the ESID and multiplying by a prime
     * number (0x13bb).
     */
    #define KERNEL_VSID_BIT 0x0000001000000000UL /* Bit set in all kernel VSIDs */
    #define KERNEL_VSID(esid) ((((((uint64_t)esid << 8) | ((uint64_t)esid >> 28)) \
                                    * 0x13bbUL) & (KERNEL_VSID_BIT - 1)) | \
                                    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
    
    /*
     * SLB page sizes encoding, as present in property ibm,segment-page-sizes
     * of CPU device tree node.
     *
     * See LoPAPR: CPU Node Properties, section C.6.1.4.
     */
    #define SLB_PGSZ_4K_4K  0
    
    /* Virtual real-mode VSID in LPARs */
    #define VSID_VRMA       0x1ffffff
    
    /*
     * User segment for copyin/out
     */
    #define USER_SLB_SLOT 0
    #define USER_SLB_SLBE (((USER_ADDR >> ADDR_SR_SHFT) << SLBE_ESID_SHIFT) | \
                            SLBE_VALID | USER_SLB_SLOT)
    
    struct slb {
            uint64_t        slbv;
            uint64_t        slbe;
    };
    
    struct pmap;
    void    handle_kernel_slb_spill(int, register_t, register_t);
    int     handle_user_slb_spill(struct pmap *pm, vm_offset_t addr);
    
    #endif /* !_MACHINE_SLB_H_ */

Cache object: 98cb1e35338f028ae0f4b175ac1bd19d