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d4a7df2e65
setting an absolute MSR when during on the MMU. This prevents delay(), in particular, from intermittently malfunctioning.
121 lines
3.1 KiB
C
121 lines
3.1 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 <stand.h>
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#include <stdint.h>
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#define _KERNEL
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#include <machine/cpufunc.h>
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#include <machine/psl.h>
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#include <machine/pte.h>
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#include <machine/slb.h>
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#include <machine/param.h>
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#include "bootstrap.h"
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#include "lv1call.h"
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#include "ps3.h"
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register_t pteg_count, pteg_mask;
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uint64_t as_id;
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uint64_t virtual_avail;
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int
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ps3mmu_map(uint64_t va, uint64_t pa)
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{
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struct lpte pt;
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int shift;
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uint64_t vsid, ptegidx;
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if (pa < 0x8000000) { /* Phys mem? */
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pt.pte_hi = LPTE_BIG;
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pt.pte_lo = LPTE_M;
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shift = 24;
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vsid = 0;
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} else {
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pt.pte_hi = 0;
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pt.pte_lo = LPTE_I | LPTE_G | LPTE_M | LPTE_NOEXEC;
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shift = ADDR_PIDX_SHFT;
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vsid = 1;
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}
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pt.pte_hi |= (vsid << LPTE_VSID_SHIFT) |
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(((uint64_t)(va & ADDR_PIDX) >> ADDR_API_SHFT64) & LPTE_API);
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pt.pte_lo |= pa;
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ptegidx = vsid ^ (((uint64_t)va & ADDR_PIDX) >> shift);
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pt.pte_hi |= LPTE_LOCKED | LPTE_VALID;
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ptegidx &= pteg_mask;
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return (lv1_insert_pte(ptegidx, &pt, LPTE_LOCKED));
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}
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void *
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ps3mmu_mapdev(uint64_t pa, size_t length)
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{
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uint64_t spa;
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void *mapstart;
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int err;
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mapstart = (void *)(uintptr_t)virtual_avail;
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for (spa = pa; spa < pa + length; spa += PAGE_SIZE) {
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err = ps3mmu_map(virtual_avail, spa);
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virtual_avail += PAGE_SIZE;
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if (err != 0)
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return (NULL);
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}
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return (mapstart);
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}
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int
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ps3mmu_init(int maxmem)
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{
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uint64_t ptsize;
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int i;
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i = lv1_setup_address_space(&as_id, &ptsize);
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pteg_count = ptsize / sizeof(struct lpteg);
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pteg_mask = pteg_count - 1;
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for (i = 0; i < maxmem; i += 16*1024*1024)
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ps3mmu_map(i,i);
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virtual_avail = 0x10000000;
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__asm __volatile ("slbia; slbmte %0, %1; slbmte %2,%3" ::
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"r"((0 << SLBV_VSID_SHIFT) | SLBV_L), "r"(0 | SLBE_VALID),
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"r"(1 << SLBV_VSID_SHIFT),
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"r"((1 << SLBE_ESID_SHIFT) | SLBE_VALID | 1));
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mtmsr(PSL_IR | PSL_DR | PSL_RI | PSL_ME);
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return (0);
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}
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