arch/alpha/vtophys.cc: fix up vtophys to deal with translations if there is no ptbr, and to deal with PAL addresses add ptomem which is just a wrapper for dma_addr arch/alpha/vtophys.hh: add ptomem which is a wrapper for dma_addr with the same usage as vtomem --HG-- extra : convert_revision : 1ae22073d400e87b708a4a7ef501124227fc6c39
230 lines
6.4 KiB
C++
230 lines
6.4 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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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 are
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* met: 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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* 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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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string>
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#include "targetarch/pmap.h"
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#include "cpu/exec_context.hh"
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#include "mem/functional_mem/physical_memory.hh"
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#include "base/trace.hh"
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#include "targetarch/vtophys.hh"
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using namespace std;
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inline Addr
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level3_index(Addr vaddr)
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{ return (vaddr >> ALPHA_PGSHIFT) & PTEMASK; }
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inline Addr
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level2_index(Addr vaddr)
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{ return (vaddr >> (ALPHA_PGSHIFT + NPTEPG_SHIFT)) & PTEMASK; }
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inline Addr
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level1_index(Addr vaddr)
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{ return (vaddr >> (ALPHA_PGSHIFT + 2 * NPTEPG_SHIFT)) & PTEMASK; }
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Addr
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kernel_pte_lookup(PhysicalMemory *pmem, Addr ptbr, Addr vaddr)
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{
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uint64_t level1_map = ptbr;
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Addr level1_pte = level1_map + (level1_index(vaddr) << PTESHIFT);
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uint64_t level1 = pmem->phys_read_qword(level1_pte);
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if (!entry_valid(level1)) {
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DPRINTF(VtoPhys, "level 1 PTE not valid, va = %#\n", vaddr);
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return 0;
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}
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uint64_t level2_map = PMAP_PTE_PA(level1);
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Addr level2_pte = level2_map + (level2_index(vaddr) << PTESHIFT);
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uint64_t level2 = pmem->phys_read_qword(level2_pte);
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if (!entry_valid(level2)) {
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DPRINTF(VtoPhys, "level 2 PTE not valid, va = %#x\n", vaddr);
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return 0;
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}
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uint64_t level3_map = PMAP_PTE_PA(level2);
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Addr level3_pte = level3_map + (level3_index(vaddr) << PTESHIFT);
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return level3_pte;
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}
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Addr
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vtophys(PhysicalMemory *xc, Addr vaddr)
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{
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Addr paddr = 0;
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if (vaddr < ALPHA_K0SEG_BASE)
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DPRINTF(VtoPhys, "vtophys: invalid vaddr %#x", vaddr);
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else if (vaddr < ALPHA_K1SEG_BASE)
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paddr = ALPHA_K0SEG_TO_PHYS(vaddr);
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else
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panic("vtophys: ptbr is not set on virtual lookup");
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DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
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return paddr;
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}
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Addr
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vtophys(ExecContext *xc, Addr vaddr)
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{
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Addr ptbr = xc->regs.ipr[AlphaISA::IPR_PALtemp20];
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Addr paddr = 0;
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if (PC_PAL(vaddr)) {
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paddr = vaddr & ~ULL(1);
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} else if (!ptbr) {
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paddr = vaddr;
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} else {
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if (vaddr >= ALPHA_K0SEG_BASE && vaddr <= ALPHA_K0SEG_END) {
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paddr = ALPHA_K0SEG_TO_PHYS(vaddr);
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} else {
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Addr pte = kernel_pte_lookup(xc->physmem, ptbr, vaddr);
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uint64_t entry = xc->physmem->phys_read_qword(pte);
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if (pte && entry_valid(entry))
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paddr = PMAP_PTE_PA(entry) | (vaddr & PGOFSET);
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}
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}
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DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
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return paddr;
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}
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uint8_t *
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ptomem(ExecContext *xc, Addr paddr, size_t len)
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{
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return xc->physmem->dma_addr(paddr, len);
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}
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uint8_t *
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vtomem(ExecContext *xc, Addr vaddr, size_t len)
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{
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Addr paddr = vtophys(xc, vaddr);
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return xc->physmem->dma_addr(paddr, len);
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}
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void
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CopyData(ExecContext *xc, void *dest, Addr vaddr, size_t cplen)
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{
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Addr paddr;
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char *dmaaddr;
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char *dst = (char *)dest;
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int len;
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paddr = vtophys(xc, vaddr);
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len = min((int)(ALPHA_PGBYTES - (paddr & PGOFSET)), (int)cplen);
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dmaaddr = (char *)xc->physmem->dma_addr(paddr, len);
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assert(dmaaddr);
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memcpy(dst, dmaaddr, len);
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if (len == cplen)
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return;
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cplen -= len;
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dst += len;
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vaddr += len;
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while (cplen > ALPHA_PGBYTES) {
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paddr = vtophys(xc, vaddr);
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dmaaddr = (char *)xc->physmem->dma_addr(paddr, ALPHA_PGBYTES);
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assert(dmaaddr);
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memcpy(dst, dmaaddr, ALPHA_PGBYTES);
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cplen -= ALPHA_PGBYTES;
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dst += ALPHA_PGBYTES;
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vaddr += ALPHA_PGBYTES;
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}
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if (cplen > 0) {
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paddr = vtophys(xc, vaddr);
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dmaaddr = (char *)xc->physmem->dma_addr(paddr, cplen);
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assert(dmaaddr);
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memcpy(dst, dmaaddr, cplen);
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}
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}
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void
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CopyString(ExecContext *xc, char *dst, Addr vaddr, size_t maxlen)
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{
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Addr paddr;
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char *dmaaddr;
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int len;
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paddr = vtophys(xc, vaddr);
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len = min((int)(ALPHA_PGBYTES - (paddr & PGOFSET)), (int)maxlen);
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dmaaddr = (char *)xc->physmem->dma_addr(paddr, len);
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assert(dmaaddr);
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char *term = (char *)memchr(dmaaddr, 0, len);
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if (term)
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len = term - dmaaddr + 1;
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memcpy(dst, dmaaddr, len);
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if (term || len == maxlen)
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return;
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maxlen -= len;
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dst += len;
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vaddr += len;
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while (maxlen > ALPHA_PGBYTES) {
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paddr = vtophys(xc, vaddr);
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dmaaddr = (char *)xc->physmem->dma_addr(paddr, ALPHA_PGBYTES);
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assert(dmaaddr);
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char *term = (char *)memchr(dmaaddr, 0, ALPHA_PGBYTES);
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len = term ? (term - dmaaddr + 1) : ALPHA_PGBYTES;
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memcpy(dst, dmaaddr, len);
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if (term)
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return;
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maxlen -= ALPHA_PGBYTES;
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dst += ALPHA_PGBYTES;
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vaddr += ALPHA_PGBYTES;
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}
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if (maxlen > 0) {
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paddr = vtophys(xc, vaddr);
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dmaaddr = (char *)xc->physmem->dma_addr(paddr, maxlen);
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assert(dmaaddr);
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char *term = (char *)memchr(dmaaddr, 0, maxlen);
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len = term ? (term - dmaaddr + 1) : maxlen;
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memcpy(dst, dmaaddr, len);
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maxlen -= len;
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}
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if (maxlen == 0)
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dst[maxlen] = '\0';
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}
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