gem5/arch/alpha/vtophys.cc
Nathan Binkert 224acc2abc get rid of pmap.h and make things variables and inline
functions instead of preprocessor macros.

arch/alpha/vtophys.cc:
    use new constants, functions and structs to clean up the
    vtophys code.
arch/alpha/vtophys.hh:
    Clean up a little bit and make the protypes match new changes.
base/remote_gdb.cc:
dev/ide_disk.cc:
kern/tru64/tru64_events.cc:
    use new constants from isa_traits.hh instead of ones from
    old pmap.h

--HG--
extra : convert_revision : 5dce34e3b0c84ba72cefca34e5999b99898edcef
2004-10-23 10:41:35 -04:00

264 lines
7.4 KiB
C++

/*
* Copyright (c) 2002-2004 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* 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;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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 <string>
#include "arch/alpha/vtophys.hh"
#include "base/trace.hh"
#include "cpu/exec_context.hh"
#include "mem/functional_mem/physical_memory.hh"
using namespace std;
AlphaISA::PageTableEntry
kernel_pte_lookup(PhysicalMemory *pmem, Addr ptbr, AlphaISA::VAddr vaddr)
{
Addr level1_pte = ptbr + vaddr.level1();
AlphaISA::PageTableEntry level1 = pmem->phys_read_qword(level1_pte);
if (!level1.valid()) {
DPRINTF(VtoPhys, "level 1 PTE not valid, va = %#\n", vaddr);
return 0;
}
Addr level2_pte = level1.paddr() + vaddr.level2();
AlphaISA::PageTableEntry level2 = pmem->phys_read_qword(level2_pte);
if (!level2.valid()) {
DPRINTF(VtoPhys, "level 2 PTE not valid, va = %#x\n", vaddr);
return 0;
}
Addr level3_pte = level2.paddr() + vaddr.level3();
AlphaISA::PageTableEntry level3 = pmem->phys_read_qword(level3_pte);
if (!level3.valid()) {
DPRINTF(VtoPhys, "level 3 PTE not valid, va = %#x\n", vaddr);
return 0;
}
return level3;
}
Addr
vtophys(PhysicalMemory *xc, Addr vaddr)
{
Addr paddr = 0;
if (AlphaISA::IsUSeg(vaddr))
DPRINTF(VtoPhys, "vtophys: invalid vaddr %#x", vaddr);
else if (AlphaISA::IsK0Seg(vaddr))
paddr = AlphaISA::K0Seg2Phys(vaddr);
else
panic("vtophys: ptbr is not set on virtual lookup");
DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
return paddr;
}
Addr
vtophys(ExecContext *xc, Addr addr)
{
AlphaISA::VAddr vaddr = addr;
Addr ptbr = xc->regs.ipr[AlphaISA::IPR_PALtemp20];
Addr paddr = 0;
//@todo Andrew couldn't remember why he commented some of this code
//so I put it back in. Perhaps something to do with gdb debugging?
if (PC_PAL(vaddr) && (vaddr < PAL_MAX)) {
paddr = vaddr & ~ULL(1);
} else {
if (AlphaISA::IsK0Seg(vaddr)) {
paddr = AlphaISA::K0Seg2Phys(vaddr);
} else if (!ptbr) {
paddr = vaddr;
} else {
AlphaISA::PageTableEntry pte =
kernel_pte_lookup(xc->physmem, ptbr, vaddr);
if (pte.valid())
paddr = pte.paddr() | vaddr.offset();
}
}
DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
return paddr;
}
uint8_t *
ptomem(ExecContext *xc, Addr paddr, size_t len)
{
return xc->physmem->dma_addr(paddr, len);
}
uint8_t *
vtomem(ExecContext *xc, Addr vaddr, size_t len)
{
Addr paddr = vtophys(xc, vaddr);
return xc->physmem->dma_addr(paddr, len);
}
void
CopyOut(ExecContext *xc, void *dest, Addr src, size_t cplen)
{
Addr paddr;
char *dmaaddr;
char *dst = (char *)dest;
int len;
paddr = vtophys(xc, src);
len = min((int)(AlphaISA::PageBytes - (paddr & AlphaISA::PageOffset)),
(int)cplen);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, len);
assert(dmaaddr);
memcpy(dst, dmaaddr, len);
if (len == cplen)
return;
cplen -= len;
dst += len;
src += len;
while (cplen > AlphaISA::PageBytes) {
paddr = vtophys(xc, src);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, AlphaISA::PageBytes);
assert(dmaaddr);
memcpy(dst, dmaaddr, AlphaISA::PageBytes);
cplen -= AlphaISA::PageBytes;
dst += AlphaISA::PageBytes;
src += AlphaISA::PageBytes;
}
if (cplen > 0) {
paddr = vtophys(xc, src);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, cplen);
assert(dmaaddr);
memcpy(dst, dmaaddr, cplen);
}
}
void
CopyIn(ExecContext *xc, Addr dest, void *source, size_t cplen)
{
Addr paddr;
char *dmaaddr;
char *src = (char *)source;
int len;
paddr = vtophys(xc, dest);
len = min((int)(AlphaISA::PageBytes - (paddr & AlphaISA::PageOffset)),
(int)cplen);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, len);
assert(dmaaddr);
memcpy(dmaaddr, src, len);
if (len == cplen)
return;
cplen -= len;
src += len;
dest += len;
while (cplen > AlphaISA::PageBytes) {
paddr = vtophys(xc, dest);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, AlphaISA::PageBytes);
assert(dmaaddr);
memcpy(dmaaddr, src, AlphaISA::PageBytes);
cplen -= AlphaISA::PageBytes;
src += AlphaISA::PageBytes;
dest += AlphaISA::PageBytes;
}
if (cplen > 0) {
paddr = vtophys(xc, dest);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, cplen);
assert(dmaaddr);
memcpy(dmaaddr, src, cplen);
}
}
void
CopyString(ExecContext *xc, char *dst, Addr vaddr, size_t maxlen)
{
Addr paddr;
char *dmaaddr;
int len;
paddr = vtophys(xc, vaddr);
len = min((int)(AlphaISA::PageBytes - (paddr & AlphaISA::PageOffset)),
(int)maxlen);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, len);
assert(dmaaddr);
char *term = (char *)memchr(dmaaddr, 0, len);
if (term)
len = term - dmaaddr + 1;
memcpy(dst, dmaaddr, len);
if (term || len == maxlen)
return;
maxlen -= len;
dst += len;
vaddr += len;
while (maxlen > AlphaISA::PageBytes) {
paddr = vtophys(xc, vaddr);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, AlphaISA::PageBytes);
assert(dmaaddr);
char *term = (char *)memchr(dmaaddr, 0, AlphaISA::PageBytes);
len = term ? (term - dmaaddr + 1) : AlphaISA::PageBytes;
memcpy(dst, dmaaddr, len);
if (term)
return;
maxlen -= AlphaISA::PageBytes;
dst += AlphaISA::PageBytes;
vaddr += AlphaISA::PageBytes;
}
if (maxlen > 0) {
paddr = vtophys(xc, vaddr);
dmaaddr = (char *)xc->physmem->dma_addr(paddr, maxlen);
assert(dmaaddr);
char *term = (char *)memchr(dmaaddr, 0, maxlen);
len = term ? (term - dmaaddr + 1) : maxlen;
memcpy(dst, dmaaddr, len);
maxlen -= len;
}
if (maxlen == 0)
dst[maxlen] = '\0';
}