590f9303e5
Remove unused inclusion of vm/vm_pager.h and vm/vnode_pager.h. Sponsored by: EMC / Isilon storage division Tested by: pho Reviewed by: alc
311 lines
8.3 KiB
C
311 lines
8.3 KiB
C
/*-
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* Copyright (C) 2010 Nathan Whitehorn
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* All rights reserved.
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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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/ktr.h>
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#include <sys/lock.h>
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#include <sys/msgbuf.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/vmmeter.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_page.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_pageout.h>
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#include <vm/uma.h>
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#include <powerpc/aim/mmu_oea64.h>
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#include "mmu_if.h"
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#include "moea64_if.h"
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#include "ps3-hvcall.h"
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#define VSID_HASH_MASK 0x0000007fffffffffUL
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#define PTESYNC() __asm __volatile("ptesync")
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extern int ps3fb_remap(void);
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static uint64_t mps3_vas_id;
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/*
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* Kernel MMU interface
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*/
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static void mps3_bootstrap(mmu_t mmup, vm_offset_t kernelstart,
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vm_offset_t kernelend);
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static void mps3_cpu_bootstrap(mmu_t mmup, int ap);
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static void mps3_pte_synch(mmu_t, uintptr_t pt, struct lpte *pvo_pt);
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static void mps3_pte_clear(mmu_t, uintptr_t pt, struct lpte *pvo_pt,
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uint64_t vpn, uint64_t ptebit);
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static void mps3_pte_unset(mmu_t, uintptr_t pt, struct lpte *pvo_pt,
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uint64_t vpn);
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static void mps3_pte_change(mmu_t, uintptr_t pt, struct lpte *pvo_pt,
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uint64_t vpn);
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static int mps3_pte_insert(mmu_t, u_int ptegidx, struct lpte *pvo_pt);
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static uintptr_t mps3_pvo_to_pte(mmu_t, const struct pvo_entry *pvo);
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static mmu_method_t mps3_methods[] = {
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MMUMETHOD(mmu_bootstrap, mps3_bootstrap),
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MMUMETHOD(mmu_cpu_bootstrap, mps3_cpu_bootstrap),
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MMUMETHOD(moea64_pte_synch, mps3_pte_synch),
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MMUMETHOD(moea64_pte_clear, mps3_pte_clear),
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MMUMETHOD(moea64_pte_unset, mps3_pte_unset),
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MMUMETHOD(moea64_pte_change, mps3_pte_change),
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MMUMETHOD(moea64_pte_insert, mps3_pte_insert),
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MMUMETHOD(moea64_pvo_to_pte, mps3_pvo_to_pte),
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{ 0, 0 }
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};
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MMU_DEF_INHERIT(ps3_mmu, "mmu_ps3", mps3_methods, 0, oea64_mmu);
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static void
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mps3_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
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{
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uint64_t final_pteg_count;
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moea64_early_bootstrap(mmup, kernelstart, kernelend);
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lv1_construct_virtual_address_space(
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20 /* log_2(moea64_pteg_count) */, 2 /* n page sizes */,
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(24UL << 56) | (16UL << 48) /* page sizes 16 MB + 64 KB */,
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&mps3_vas_id, &final_pteg_count
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);
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moea64_pteg_count = final_pteg_count / sizeof(struct lpteg);
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moea64_mid_bootstrap(mmup, kernelstart, kernelend);
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moea64_late_bootstrap(mmup, kernelstart, kernelend);
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}
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static void
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mps3_cpu_bootstrap(mmu_t mmup, int ap)
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{
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struct slb *slb = PCPU_GET(slb);
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register_t seg0;
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int i;
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mtmsr(mfmsr() & ~PSL_DR & ~PSL_IR);
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/*
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* Destroy the loader's address space if we are coming up for
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* the first time, and redo the FB mapping so we can continue
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* having a console.
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*/
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if (!ap)
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lv1_destruct_virtual_address_space(0);
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lv1_select_virtual_address_space(mps3_vas_id);
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if (!ap)
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ps3fb_remap();
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/*
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* Install kernel SLB entries
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*/
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__asm __volatile ("slbia");
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__asm __volatile ("slbmfee %0,%1; slbie %0;" : "=r"(seg0) : "r"(0));
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for (i = 0; i < 64; i++) {
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if (!(slb[i].slbe & SLBE_VALID))
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continue;
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__asm __volatile ("slbmte %0, %1" ::
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"r"(slb[i].slbv), "r"(slb[i].slbe));
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}
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}
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static void
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mps3_pte_synch(mmu_t mmu, uintptr_t slot, struct lpte *pvo_pt)
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{
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uint64_t halfbucket[4], rcbits;
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PTESYNC();
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lv1_read_htab_entries(mps3_vas_id, slot & ~0x3UL, &halfbucket[0],
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&halfbucket[1], &halfbucket[2], &halfbucket[3], &rcbits);
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/*
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* rcbits contains the low 12 bits of each PTEs 2nd part,
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* spaced at 16-bit intervals
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*/
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KASSERT((halfbucket[slot & 0x3] & LPTE_AVPN_MASK) ==
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(pvo_pt->pte_hi & LPTE_AVPN_MASK),
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("PTE upper word %#lx != %#lx\n",
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halfbucket[slot & 0x3], pvo_pt->pte_hi));
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pvo_pt->pte_lo |= (rcbits >> ((3 - (slot & 0x3))*16)) &
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(LPTE_CHG | LPTE_REF);
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}
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static void
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mps3_pte_clear(mmu_t mmu, uintptr_t slot, struct lpte *pvo_pt, uint64_t vpn,
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u_int64_t ptebit)
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{
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lv1_write_htab_entry(mps3_vas_id, slot, pvo_pt->pte_hi,
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pvo_pt->pte_lo & ~ptebit);
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}
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static void
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mps3_pte_unset(mmu_t mmu, uintptr_t slot, struct lpte *pvo_pt, uint64_t vpn)
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{
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mps3_pte_synch(mmu, slot, pvo_pt);
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pvo_pt->pte_hi &= ~LPTE_VALID;
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lv1_write_htab_entry(mps3_vas_id, slot, 0, 0);
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moea64_pte_valid--;
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}
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static void
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mps3_pte_change(mmu_t mmu, uintptr_t slot, struct lpte *pvo_pt, uint64_t vpn)
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{
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mps3_pte_synch(mmu, slot, pvo_pt);
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lv1_write_htab_entry(mps3_vas_id, slot, pvo_pt->pte_hi,
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pvo_pt->pte_lo);
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}
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static int
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mps3_pte_insert(mmu_t mmu, u_int ptegidx, struct lpte *pvo_pt)
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{
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int result;
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struct lpte evicted;
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struct pvo_entry *pvo;
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uint64_t index;
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pvo_pt->pte_hi |= LPTE_VALID;
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pvo_pt->pte_hi &= ~LPTE_HID;
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evicted.pte_hi = 0;
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PTESYNC();
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result = lv1_insert_htab_entry(mps3_vas_id, ptegidx << 3,
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pvo_pt->pte_hi, pvo_pt->pte_lo, LPTE_LOCKED | LPTE_WIRED, 0,
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&index, &evicted.pte_hi, &evicted.pte_lo);
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if (result != 0) {
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/* No freeable slots in either PTEG? We're hosed. */
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panic("mps3_pte_insert: overflow (%d)", result);
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return (-1);
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}
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/*
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* See where we ended up.
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*/
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if (index >> 3 != ptegidx)
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pvo_pt->pte_hi |= LPTE_HID;
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moea64_pte_valid++;
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if (!evicted.pte_hi)
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return (index & 0x7);
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/*
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* Synchronize the sacrifice PTE with its PVO, then mark both
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* invalid. The PVO will be reused when/if the VM system comes
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* here after a fault.
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*/
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ptegidx = index >> 3; /* Where the sacrifice PTE was found */
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if (evicted.pte_hi & LPTE_HID)
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ptegidx ^= moea64_pteg_mask; /* PTEs indexed by primary */
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KASSERT((evicted.pte_hi & (LPTE_WIRED | LPTE_LOCKED)) == 0,
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("Evicted a wired PTE"));
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result = 0;
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LIST_FOREACH(pvo, &moea64_pvo_table[ptegidx], pvo_olink) {
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if (!PVO_PTEGIDX_ISSET(pvo))
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continue;
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if (pvo->pvo_pte.lpte.pte_hi == (evicted.pte_hi | LPTE_VALID)) {
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KASSERT(pvo->pvo_pte.lpte.pte_hi & LPTE_VALID,
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("Invalid PVO for valid PTE!"));
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pvo->pvo_pte.lpte.pte_hi &= ~LPTE_VALID;
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pvo->pvo_pte.lpte.pte_lo |=
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evicted.pte_lo & (LPTE_REF | LPTE_CHG);
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PVO_PTEGIDX_CLR(pvo);
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moea64_pte_valid--;
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moea64_pte_overflow++;
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result = 1;
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break;
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}
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}
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KASSERT(result == 1, ("PVO for sacrifice PTE not found"));
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return (index & 0x7);
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}
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static __inline u_int
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va_to_pteg(uint64_t vsid, vm_offset_t addr, int large)
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{
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uint64_t hash;
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int shift;
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shift = large ? moea64_large_page_shift : ADDR_PIDX_SHFT;
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hash = (vsid & VSID_HASH_MASK) ^ (((uint64_t)addr & ADDR_PIDX) >>
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shift);
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return (hash & moea64_pteg_mask);
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}
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uintptr_t
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mps3_pvo_to_pte(mmu_t mmu, const struct pvo_entry *pvo)
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{
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uint64_t vsid;
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u_int ptegidx;
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/* If the PTEG index is not set, then there is no page table entry */
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if (!PVO_PTEGIDX_ISSET(pvo))
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return (-1);
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vsid = PVO_VSID(pvo);
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ptegidx = va_to_pteg(vsid, PVO_VADDR(pvo), pvo->pvo_vaddr & PVO_LARGE);
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/*
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* We can find the actual pte entry without searching by grabbing
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* the PTEG index from 3 unused bits in pvo_vaddr and by
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* noticing the HID bit.
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*/
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if (pvo->pvo_pte.lpte.pte_hi & LPTE_HID)
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ptegidx ^= moea64_pteg_mask;
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return ((ptegidx << 3) | PVO_PTEGIDX_GET(pvo));
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}
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