/*      $NetBSD: pmap_kernel.c,v 1.14 2023/12/15 09:42:33 rin Exp $     */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 THE FOUNDATION OR CONTRIBUTORS
* 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.
*/

#include <sys/cdefs.h>

__KERNEL_RCSID(1, "$NetBSD: pmap_kernel.c,v 1.14 2023/12/15 09:42:33 rin Exp $");

#ifdef _KERNEL_OPT
#include "opt_altivec.h"
#include "opt_ddb.h"
#include "opt_pmap.h"
#endif

#include <sys/param.h>
#include <uvm/uvm.h>
#include <uvm/uvm_extern.h>
#include <uvm/uvm_page.h>

#ifdef ALTIVEC
int pmap_use_altivec;
#endif
volatile struct pteg *pmap_pteg_table;
unsigned int pmap_pteg_cnt;
unsigned int pmap_pteg_mask;

struct pmap kernel_pmap_;
struct pmap *const kernel_pmap_ptr = &kernel_pmap_;

u_int
powerpc_mmap_flags(paddr_t pa)
{
       u_int flags = PMAP_NOCACHE;

       if (pa & POWERPC_MMAP_FLAG_PREFETCHABLE)
               flags |= PMAP_MD_PREFETCHABLE;
       if (pa & POWERPC_MMAP_FLAG_CACHEABLE)
               flags &= ~PMAP_NOCACHE;
       return flags;
}

struct vm_page *
pmap_alloc_poolpage(int flags)
{

       if (__predict_false(!uvm.page_init_done)) {
               struct vm_page *pg;
               paddr_t pa __diagused;

               pg = uvm_pagealloc(NULL, 0, NULL, flags);
               KASSERT(pg != NULL);
               pa = VM_PAGE_TO_PHYS(pg);
               KASSERT(pa < PMAP_DIRECT_MAPPED_LEN);
               return pg;
       }

       return uvm_pagealloc_strat(NULL, 0, NULL, flags, UVM_PGA_STRAT_ONLY,
           VM_FREELIST_DIRECT_MAPPED);
}

#ifdef PMAP_NEEDS_FIXUP
#include <powerpc/instr.h>

const struct pmap_ops *pmapops;

#define __stub  __section(".stub") __noprofile

int     pmap_pte_spill(struct pmap *, vaddr_t, bool)            __stub;
void    pmap_real_memory(paddr_t *, psize_t *)                  __stub;
void    pmap_init(void)                                         __stub;
void    pmap_virtual_space(vaddr_t *, vaddr_t *)                __stub;
pmap_t  pmap_create(void)                                       __stub;
void    pmap_reference(pmap_t)                                  __stub;
void    pmap_destroy(pmap_t)                                    __stub;
void    pmap_copy(pmap_t, pmap_t, vaddr_t, vsize_t, vaddr_t)    __stub;
void    pmap_update(pmap_t)                                     __stub;
int     pmap_enter(pmap_t, vaddr_t, paddr_t, vm_prot_t, u_int)  __stub;
void    pmap_remove(pmap_t, vaddr_t, vaddr_t)                   __stub;
void    pmap_kenter_pa(vaddr_t, paddr_t, vm_prot_t, u_int)      __stub;
void    pmap_kremove(vaddr_t, vsize_t)                          __stub;
bool    pmap_extract(pmap_t, vaddr_t, paddr_t *)                __stub;

void    pmap_protect(pmap_t, vaddr_t, vaddr_t, vm_prot_t)       __stub;
void    pmap_unwire(pmap_t, vaddr_t)                            __stub;
void    pmap_page_protect(struct vm_page *, vm_prot_t)          __stub;
bool    pmap_query_bit(struct vm_page *, int)                   __stub;
bool    pmap_clear_bit(struct vm_page *, int)                   __stub;

void    pmap_activate(struct lwp *)                             __stub;
void    pmap_deactivate(struct lwp *)                           __stub;

void    pmap_pinit(pmap_t)                                      __stub;
void    pmap_procwr(struct proc *, vaddr_t, size_t)             __stub;

#if defined(DEBUG) || defined(PMAPCHECK) || defined(DDB)
void    pmap_pte_print(volatile struct pte *)                   __stub;
void    pmap_pteg_check(void)                                   __stub;
void    pmap_print_mmuregs(void)                                __stub;
void    pmap_print_pte(pmap_t, vaddr_t)                         __stub;
void    pmap_pteg_dist(void)                                    __stub;
#endif
#if defined(DEBUG) || defined(PMAPCHECK)
void    pmap_pvo_verify(void)                                   __stub;
#endif
vaddr_t pmap_steal_memory(vsize_t, vaddr_t *, vaddr_t *)        __stub;
void    pmap_bootstrap(paddr_t, paddr_t)                        __stub;
void    pmap_bootstrap1(paddr_t, paddr_t)                       __stub;
void    pmap_bootstrap2(void)                                   __stub;

int
pmap_pte_spill(struct pmap *pm, vaddr_t va, bool exec)
{
       return (*pmapops->pmapop_pte_spill)(pm, va, exec);
}

void
pmap_real_memory(paddr_t *start, psize_t *size)
{
       (*pmapops->pmapop_real_memory)(start, size);
}

void
pmap_init(void)
{
       (*pmapops->pmapop_init)();
}

void
pmap_virtual_space(vaddr_t *startp, vaddr_t *endp)
{
       (*pmapops->pmapop_virtual_space)(startp, endp);
}

pmap_t
pmap_create(void)
{
       return (*pmapops->pmapop_create)();
}

void
pmap_reference(pmap_t pm)
{
       (*pmapops->pmapop_reference)(pm);
}

void
pmap_destroy(pmap_t pm)
{
       (*pmapops->pmapop_destroy)(pm);
}

void
pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vaddr_t dst_va, vsize_t len,
       vaddr_t src_va)
{
       (*pmapops->pmapop_copy)(dst_pmap, src_pmap, dst_va, len, src_va);
}

void
pmap_update(pmap_t pm)
{
       (*pmapops->pmapop_update)(pm);
}

int
pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags)
{
       return (*pmapops->pmapop_enter)(pm, va, pa, prot, flags);
}

void
pmap_remove(pmap_t pm, vaddr_t start, vaddr_t end)
{
       (*pmapops->pmapop_remove)(pm, start, end);
}

void
pmap_kenter_pa(vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags)
{
       (*pmapops->pmapop_kenter_pa)(va, pa, prot, flags);
}

void
pmap_kremove(vaddr_t start, vsize_t end)
{
       (*pmapops->pmapop_kremove)(start, end);
}

bool
pmap_extract(pmap_t pm, vaddr_t va, paddr_t *pap)
{
       return (*pmapops->pmapop_extract)(pm, va, pap);
}

void
pmap_protect(pmap_t pm, vaddr_t start, vaddr_t end, vm_prot_t prot)
{
       (*pmapops->pmapop_protect)(pm, start, end, prot);
}

void
pmap_unwire(pmap_t pm, vaddr_t va)
{
       (*pmapops->pmapop_unwire)(pm, va);
}

void
pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
{
       (*pmapops->pmapop_page_protect)(pg, prot);
}

void
pmap_pv_protect(paddr_t pa, vm_prot_t prot)
{
       (*pmapops->pmapop_pv_protect)(pa, prot);
}

bool
pmap_query_bit(struct vm_page *pg, int ptebit)
{
       return (*pmapops->pmapop_query_bit)(pg, ptebit);
}

bool
pmap_clear_bit(struct vm_page *pg, int ptebit)
{
       return (*pmapops->pmapop_clear_bit)(pg, ptebit);
}

void
pmap_activate(struct lwp *l)
{
       (*pmapops->pmapop_activate)(l);
}

void
pmap_deactivate(struct lwp *l)
{
       (*pmapops->pmapop_deactivate)(l);
}

void
pmap_pinit(pmap_t pm)
{
       (*pmapops->pmapop_pinit)(pm);
}

void
pmap_procwr(struct proc *p, vaddr_t va, size_t len)
{
       (*pmapops->pmapop_procwr)(p, va, len);
}

#if defined(DEBUG) || defined(PMAPCHECK) || defined(DDB)
void
pmap_pte_print(volatile struct pte *ptep)
{
       (*pmapops->pmapop_pte_print)(ptep);
}

void
pmap_pteg_check(void)
{
       (*pmapops->pmapop_pteg_check)();
}

void
pmap_print_mmuregs(void)
{
       (*pmapops->pmapop_print_mmuregs)();
}

void
pmap_print_pte(pmap_t pm, vaddr_t va)
{
       (*pmapops->pmapop_print_pte)(pm, va);
}

void
pmap_pteg_dist(void)
{
       (*pmapops->pmapop_pteg_dist)();
}
#endif

#if defined(DEBUG) || defined(PMAPCHECK)
void
pmap_pvo_verify(void)
{
       (*pmapops->pmapop_pvo_verify)();
}
#endif

vaddr_t
pmap_steal_memory(vsize_t vsize, vaddr_t *vstartp, vaddr_t *vendp)
{
       return (*pmapops->pmapop_steal_memory)(vsize, vstartp, vendp);
}

void
pmap_bootstrap(paddr_t startkernel, paddr_t endkernel)
{
       (*pmapops->pmapop_bootstrap)(startkernel, endkernel);
}

void
pmap_bootstrap1(paddr_t startkernel, paddr_t endkernel)
{
       (*pmapops->pmapop_bootstrap1)(startkernel, endkernel);
}

void
pmap_bootstrap2(void)
{
       (*pmapops->pmapop_bootstrap2)();
}
#endif

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