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fix up vtophys a bit

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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
This commit is contained in:
Nathan Binkert
2004-02-13 15:36:21 -05:00
parent 5e82f8d84c
commit 8232c9743d
2 changed files with 19 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
arch/alpha/vtophys.cc
View File

@@ -96,18 +96,19 @@ vtophys(ExecContext *xc, Addr vaddr)
{
Addr ptbr = xc->regs.ipr[AlphaISA::IPR_PALtemp20];
Addr paddr = 0;
if (vaddr < ALPHA_K0SEG_BASE) {
DPRINTF(VtoPhys, "vtophys: invalid vaddr %#x", vaddr);
} else if (vaddr < ALPHA_K1SEG_BASE) {
paddr = ALPHA_K0SEG_TO_PHYS(vaddr);
if (PC_PAL(vaddr)) {
paddr = vaddr & ~ULL(1);
} else if (!ptbr) {
paddr = vaddr;
} else {
if (!ptbr)
panic("vtophys: ptbr is not set on virtual lookup");
Addr pte = kernel_pte_lookup(xc->physmem, ptbr, vaddr);
uint64_t entry = xc->physmem->phys_read_qword(pte);
if (pte && entry_valid(entry))
paddr = PMAP_PTE_PA(entry) | (vaddr & PGOFSET);
if (vaddr >= ALPHA_K0SEG_BASE && vaddr <= ALPHA_K0SEG_END) {
paddr = ALPHA_K0SEG_TO_PHYS(vaddr);
} else {
Addr pte = kernel_pte_lookup(xc->physmem, ptbr, vaddr);
uint64_t entry = xc->physmem->phys_read_qword(pte);
if (pte && entry_valid(entry))
paddr = PMAP_PTE_PA(entry) | (vaddr & PGOFSET);
}
}
DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
@@ -115,6 +116,12 @@ vtophys(ExecContext *xc, Addr vaddr)
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)
{

1
arch/alpha/vtophys.hh
View File

@@ -42,6 +42,7 @@ Addr kernel_pte_lookup(PhysicalMemory *pmem, Addr ptbr, Addr vaddr);
Addr vtophys(PhysicalMemory *xc, Addr vaddr);
Addr vtophys(ExecContext *xc, Addr vaddr);
uint8_t *vtomem(ExecContext *xc, Addr vaddr, size_t len);
uint8_t *ptomem(ExecContext *xc, Addr paddr, size_t len);
void CopyData(ExecContext *xc, void *dst, Addr vaddr, size_t len);
void CopyString(ExecContext *xc, char *dst, Addr vaddr, size_t maxlen);