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Add ACPI-based timer (pmtimer) functionality

This commit is contained in:
Jan Stoess 2007-08-09 16:51:21 +02:00
parent ed2cfd80fa
commit fa07d37e77
1 changed files with 17 additions and 1 deletions
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18
kernel/src/platform/generic/intctrl-apic.cc
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@ -187,20 +187,36 @@ void SECTION (".init") intctrl_t::init_arch()
TRACE_INIT("RSDT is at %p\n", rsdt);
TRACE_INIT("XSDT is at %p\n", xsdt);
acpi_fadt_t *fadt = NULL, *_fadt;
acpi_madt_t* madt = NULL, *_madt;
if (xsdt_phys != NULL)
{
xsdt = (acpi_xsdt_t*)acpi_remap(xsdt_phys);
fadt = (acpi_fadt_t*) xsdt->find("FACP", (addr_t) xsdt_phys);
madt = (acpi_madt_t*) xsdt->find("APIC", (addr_t) xsdt_phys);
}
if ((madt == NULL) && (rsdt_phys != NULL))
{
rsdt = (acpi_rsdt_t*)acpi_remap(rsdt_phys);
rsdt->list(rsdt_phys);
fadt = (acpi_fadt_t*) rsdt->find("FACP", (addr_t) rsdt_phys);
madt = (acpi_madt_t*) rsdt->find("APIC", (addr_t) rsdt_phys);
}
if (fadt)
{
_fadt = (acpi_fadt_t*)acpi_remap(fadt);
TRACE_INIT("FADT is at %p (remap %p), pmtimer IO port %x\n",
fadt, _fadt, _fadt->pmtimer_ioport());
pmtimer_available = true;
pmtimer_ioport = _fadt->pmtimer_ioport();
}
else
pmtimer_available = false;
if (madt == NULL)
return;