176 lines
4.8 KiB
C
176 lines
4.8 KiB
C
/* $NetBSD: pmap.h,v 1.1 2014/09/19 17:36:26 matt Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RISCV_PMAP_H_
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#define _RISCV_PMAP_H_
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#ifdef _KERNEL_OPT
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#include "opt_modular.h"
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#endif
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#if !defined(_MODULE)
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#include <sys/types.h>
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#include <sys/pool.h>
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#include <sys/evcnt.h>
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#include <uvm/pmap/vmpagemd.h>
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#include <riscv/pte.h>
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#define PMAP_SEGTABSIZE (__SHIFTOUT(PTE_PPN0, PTE_PPN0) + 1)
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#define PMAP_PDETABSIZE (__SHIFTOUT(PTE_PPN0, PTE_PPN0) + 1)
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#define NBSEG (NBPG*NPTEPG)
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#ifdef _LP64
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#define NBXSEG (NBSEG*NSEGPG)
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#define XSEGSHIFT (SEGSHIFT + PGSHIFT - 3)
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#define XSEGOFSET (PTE_PPN1|SEGOFSET)
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#define SEGSHIFT (PGSHIFT + PGSHIFT - 3)
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#else
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#define SEGSHIFT (PGSHIFT + PGSHIFT - 2)
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#endif
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#define SEGOFSET (PTE_PPN0|PAGE_MASK)
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#define KERNEL_PID 0
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#define PMAP_HWPAGEWALKER 1
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#define PMAP_TLB_NUM_PIDS 256
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#define PMAP_TLB_MAX 1
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#ifdef _LP64
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#define PMAP_INVALID_PDETAB_ADDRESS ((pmap_pdetab_t *)(VM_MIN_KERNEL_ADDRESS - PAGE_SIZE))
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#define PMAP_INVALID_SEGTAB_ADDRESS ((pmap_segtab_t *)(VM_MIN_KERNEL_ADDRESS - PAGE_SIZE))
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#else
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#define PMAP_INVALID_PDETAB_ADDRESS ((pmap_pdetab_t *)0xdeadbeef)
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#define PMAP_INVALID_SEGTAB_ADDRESS ((pmap_segtab_t *)0xdeadbeef)
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#endif
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#define PMAP_TLB_FLUSH_ASID_ON_RESET false
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#define pmap_phys_address(x) (x)
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#define PMAP_NEED_PROCWR
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static inline void
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pmap_procwr(struct proc *p, vaddr_t va, vsize_t len)
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{
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__asm __volatile("fence\trw,rw; fence.i");
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}
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#include <uvm/pmap/tlb.h>
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#include <uvm/pmap/pmap_tlb.h>
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#define PMAP_GROWKERNEL
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#define PMAP_STEAL_MEMORY
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#ifdef _KERNEL
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#define __HAVE_PMAP_MD
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struct pmap_md {
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paddr_t md_ptbr;
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};
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struct vm_page *
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pmap_md_alloc_poolpage(int flags);
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vaddr_t pmap_md_map_poolpage(paddr_t, vsize_t);
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void pmap_md_unmap_poolpage(vaddr_t, vsize_t);
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bool pmap_md_direct_mapped_vaddr_p(vaddr_t);
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bool pmap_md_io_vaddr_p(vaddr_t);
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paddr_t pmap_md_direct_mapped_vaddr_to_paddr(vaddr_t);
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vaddr_t pmap_md_direct_map_paddr(paddr_t);
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void pmap_md_init(void);
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bool pmap_md_tlb_check_entry(void *, vaddr_t, tlb_asid_t, pt_entry_t);
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//void pmap_md_page_syncicache(struct vm_page *, const kcpuset_t *);
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void pmap_md_pdetab_activate(struct pmap *);
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void pmap_md_pdetab_init(struct pmap *);
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#ifdef __PMAP_PRIVATE
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static inline void
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pmap_md_page_syncicache(struct vm_page *pg, const kcpuset_t *kc)
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{
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__asm __volatile("fence\trw,rw; fence.i");
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}
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/*
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* Virtual Cache Alias helper routines. Not a problem for RISCV CPUs.
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*/
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static inline bool
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pmap_md_vca_add(struct vm_page *pg, vaddr_t va, pt_entry_t *nptep)
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{
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return false;
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}
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static inline void
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pmap_md_vca_remove(struct vm_page *pg, vaddr_t va)
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{
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}
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static inline void
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pmap_md_vca_clean(struct vm_page *pg, vaddr_t va, int op)
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{
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}
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static inline size_t
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pmap_md_tlb_asid_max(void)
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{
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return PMAP_TLB_NUM_PIDS - 1;
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}
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#endif /* __PMAP_PRIVATE */
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#endif /* _KERNEL */
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#define POOL_VTOPHYS(va) ((paddr_t)((vaddr_t)(va)-VM_MAX_KERNEL_ADDRESS))
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#define POOL_PHYSTOV(pa) ((vaddr_t)(paddr_t)(pa)+VM_MAX_KERNEL_ADDRESS)
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#include <uvm/pmap/pmap.h>
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#endif /* !_MODULE */
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#if defined(MODULAR) || defined(_MODULE)
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/*
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* Define a compatible vm_page_md so that struct vm_page is the same size
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* whether we are using modules or not.
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*/
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#ifndef __HAVE_VM_PAGE_MD
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#define __HAVE_VM_PAGE_MD
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struct vm_page_md {
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uintptr_t mdpg_dummy[3];
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};
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#endif /* !__HVE_VM_PAGE_MD */
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__CTASSERT(sizeof(struct vm_page_md) == sizeof(uintptr_t)*3);
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#endif /* MODULAR || _MODULE */
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#endif /* !_RISCV_PMAP_H_ */
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