freebsd-dev/sys/ia64/acpica/madt.c
Marcel Moolenaar 26279767e4 Some code churn:
o   Eliminate IA64_PHYS_TO_RR6 and change all places where the macro is used
    by calling either bus_space_map() or pmap_mapdev().
o   Implement bus_space_map() in terms of pmap_mapdev() and implement
    bus_space_unmap() in terms of pmap_unmapdev().
o   Have ia64_pib hold the uncached virtual address of the processor interrupt
    block throughout the kernel's life and access the elements of the PIB
    through this structure pointer.

This is a non-functional change with the exception of using ia64_ld1() and
ia64_st8() to write to the PIB. We were still using assignments, for which
the compiler generates semaphore reads -- which cause undefined behaviour
for uncacheable memory. Note also that the memory barriers in ipi_send() are
critical for proper functioning.

With all the mapping of uncached memory done by pmap_mapdev(), we can keep
track of the translations and wire them in the CPU. This then eliminates
the need to reserve a whole region for uncached I/O and it eliminates
translation traps for device I/O accesses.
2010-02-14 16:56:24 +00:00

248 lines
6.7 KiB
C

/*-
* Copyright (c) 2001 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/actables.h>
#include <machine/md_var.h>
struct sapic *sapic_create(int, int, u_int64_t);
static void
print_entry(ACPI_SUBTABLE_HEADER *entry)
{
switch (entry->Type) {
case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: {
ACPI_MADT_INTERRUPT_OVERRIDE *iso =
(ACPI_MADT_INTERRUPT_OVERRIDE *)entry;
printf("\tInterrupt source override entry\n");
printf("\t\tBus=%u, Source=%u, Irq=0x%x\n", iso->Bus,
iso->SourceIrq, iso->GlobalIrq);
break;
}
case ACPI_MADT_TYPE_IO_APIC:
printf("\tI/O APIC entry\n");
break;
case ACPI_MADT_TYPE_IO_SAPIC: {
ACPI_MADT_IO_SAPIC *sapic = (ACPI_MADT_IO_SAPIC *)entry;
printf("\tI/O SAPIC entry\n");
printf("\t\tId=0x%x, InterruptBase=0x%x, Address=0x%lx\n",
sapic->Id, sapic->GlobalIrqBase, sapic->Address);
break;
}
case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
printf("\tLocal APIC NMI entry\n");
break;
case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: {
ACPI_MADT_LOCAL_APIC_OVERRIDE *lapic =
(ACPI_MADT_LOCAL_APIC_OVERRIDE *)entry;
printf("\tLocal APIC override entry\n");
printf("\t\tLocal APIC address=0x%jx\n", lapic->Address);
break;
}
case ACPI_MADT_TYPE_LOCAL_SAPIC: {
ACPI_MADT_LOCAL_SAPIC *sapic = (ACPI_MADT_LOCAL_SAPIC *)entry;
printf("\tLocal SAPIC entry\n");
printf("\t\tProcessorId=0x%x, Id=0x%x, Eid=0x%x",
sapic->ProcessorId, sapic->Id, sapic->Eid);
if (!(sapic->LapicFlags & ACPI_MADT_ENABLED))
printf(" (disabled)");
printf("\n");
break;
}
case ACPI_MADT_TYPE_NMI_SOURCE:
printf("\tNMI entry\n");
break;
case ACPI_MADT_TYPE_INTERRUPT_SOURCE: {
ACPI_MADT_INTERRUPT_SOURCE *pis =
(ACPI_MADT_INTERRUPT_SOURCE *)entry;
printf("\tPlatform interrupt entry\n");
printf("\t\tPolarity=%u, TriggerMode=%u, Id=0x%x, "
"Eid=0x%x, Vector=0x%x, Irq=%d\n",
pis->IntiFlags & ACPI_MADT_POLARITY_MASK,
(pis->IntiFlags & ACPI_MADT_TRIGGER_MASK) >> 2,
pis->Id, pis->Eid, pis->IoSapicVector, pis->GlobalIrq);
break;
}
case ACPI_MADT_TYPE_LOCAL_APIC:
printf("\tLocal APIC entry\n");
break;
default:
printf("\tUnknown type %d entry\n", entry->Type);
break;
}
}
void
ia64_probe_sapics(void)
{
ACPI_PHYSICAL_ADDRESS rsdp_ptr;
ACPI_SUBTABLE_HEADER *entry;
ACPI_TABLE_MADT *table;
ACPI_TABLE_RSDP *rsdp;
ACPI_TABLE_XSDT *xsdt;
char *end, *p;
int t, tables;
if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
return;
rsdp = (ACPI_TABLE_RSDP *)IA64_PHYS_TO_RR7(rsdp_ptr);
xsdt = (ACPI_TABLE_XSDT *)IA64_PHYS_TO_RR7(rsdp->XsdtPhysicalAddress);
tables = (UINT64 *)((char *)xsdt + xsdt->Header.Length) -
xsdt->TableOffsetEntry;
for (t = 0; t < tables; t++) {
table = (ACPI_TABLE_MADT *)
IA64_PHYS_TO_RR7(xsdt->TableOffsetEntry[t]);
if (bootverbose)
printf("Table '%c%c%c%c' at %p\n",
table->Header.Signature[0],
table->Header.Signature[1],
table->Header.Signature[2],
table->Header.Signature[3], table);
if (strncmp(table->Header.Signature, ACPI_SIG_MADT,
ACPI_NAME_SIZE) != 0 ||
ACPI_FAILURE(AcpiTbChecksum((void *)table,
table->Header.Length)))
continue;
/* Save the address of the processor interrupt block. */
if (bootverbose)
printf("\tLocal APIC address=0x%x\n", table->Address);
ia64_lapic_addr = table->Address;
end = (char *)table + table->Header.Length;
p = (char *)(table + 1);
while (p < end) {
entry = (ACPI_SUBTABLE_HEADER *)p;
if (bootverbose)
print_entry(entry);
switch (entry->Type) {
case ACPI_MADT_TYPE_IO_SAPIC: {
ACPI_MADT_IO_SAPIC *sapic =
(ACPI_MADT_IO_SAPIC *)entry;
sapic_create(sapic->Id, sapic->GlobalIrqBase,
sapic->Address);
break;
}
case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: {
ACPI_MADT_LOCAL_APIC_OVERRIDE *lapic =
(ACPI_MADT_LOCAL_APIC_OVERRIDE *)entry;
ia64_lapic_addr = lapic->Address;
break;
}
#ifdef SMP
case ACPI_MADT_TYPE_LOCAL_SAPIC: {
ACPI_MADT_LOCAL_SAPIC *sapic =
(ACPI_MADT_LOCAL_SAPIC *)entry;
if (sapic->LapicFlags & ACPI_MADT_ENABLED)
cpu_mp_add(sapic->ProcessorId,
sapic->Id, sapic->Eid);
break;
}
#endif
default:
break;
}
p += entry->Length;
}
}
}
/*
* Count the number of local SAPIC entries in the APIC table. Every enabled
* entry corresponds to a processor.
*/
int
ia64_count_cpus(void)
{
ACPI_PHYSICAL_ADDRESS rsdp_ptr;
ACPI_MADT_LOCAL_SAPIC *entry;
ACPI_TABLE_MADT *table;
ACPI_TABLE_RSDP *rsdp;
ACPI_TABLE_XSDT *xsdt;
char *end, *p;
int cpus, t, tables;
if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
return (0);
rsdp = (ACPI_TABLE_RSDP *)IA64_PHYS_TO_RR7(rsdp_ptr);
xsdt = (ACPI_TABLE_XSDT *)IA64_PHYS_TO_RR7(rsdp->XsdtPhysicalAddress);
tables = (UINT64 *)((char *)xsdt + xsdt->Header.Length) -
xsdt->TableOffsetEntry;
cpus = 0;
for (t = 0; t < tables; t++) {
table = (ACPI_TABLE_MADT *)
IA64_PHYS_TO_RR7(xsdt->TableOffsetEntry[t]);
if (strncmp(table->Header.Signature, ACPI_SIG_MADT,
ACPI_NAME_SIZE) != 0 ||
ACPI_FAILURE(AcpiTbChecksum((void *)table,
table->Header.Length)))
continue;
end = (char *)table + table->Header.Length;
p = (char *)(table + 1);
while (p < end) {
entry = (ACPI_MADT_LOCAL_SAPIC *)p;
if (entry->Header.Type == ACPI_MADT_TYPE_LOCAL_SAPIC &&
(entry->LapicFlags & ACPI_MADT_ENABLED))
cpus++;
p += entry->Header.Length;
}
}
return (cpus);
}