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pc: acpi: piix4: move PCI0._PRT() into SSDT 

PCI routing table for expander buses is build with help
of build_prt() using AML API. And it's almost the same
as PRT for PCI0 bus except of power-management device.
So make existing build_prt() build PRT table for PCI0
bus as well.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2015-12-28 18:02:42 +01:00 committed by Michael S. Tsirkin
parent 06989b8861
commit 196e213783
2 changed files with 47 additions and 68 deletions
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55
hw/i386/acpi-build.c
View File

@ -623,6 +623,23 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
qobject_decref(bsel);
}
/**
* build_prt_entry:
* @link_name: link name for PCI route entry
*
* build AML package containing a PCI route entry for @link_name
*/
static Aml *build_prt_entry(const char *link_name)
{
Aml *a_zero = aml_int(0);
Aml *pkg = aml_package(4);
aml_append(pkg, a_zero);
aml_append(pkg, a_zero);
aml_append(pkg, aml_name("%s", link_name));
aml_append(pkg, a_zero);
return pkg;
}
/*
* initialize_route - Initialize the interrupt routing rule
* through a specific LINK:
@ -633,12 +650,8 @@ static Aml *initialize_route(Aml *route, const char *link_name,
Aml *lnk_idx, int idx)
{
Aml *if_ctx = aml_if(aml_equal(lnk_idx, aml_int(idx)));
Aml *pkg = aml_package(4);
Aml *pkg = build_prt_entry(link_name);
aml_append(pkg, aml_int(0));
aml_append(pkg, aml_int(0));
aml_append(pkg, aml_name("%s", link_name));
aml_append(pkg, aml_int(0));
aml_append(if_ctx, aml_store(pkg, route));
return if_ctx;
@ -654,7 +667,7 @@ static Aml *initialize_route(Aml *route, const char *link_name,
* The hash function is (slot + pin) & 3 -> "LNK[D|A|B|C]".
*
*/
static Aml *build_prt(void)
static Aml *build_prt(bool is_pci0_prt)
{
Aml *method, *while_ctx, *pin, *res;
@ -681,7 +694,29 @@ static Aml *build_prt(void)
/* route[2] = "LNK[D|A|B|C]", selection based on pin % 3 */
aml_append(while_ctx, initialize_route(route, "LNKD", lnk_idx, 0));
aml_append(while_ctx, initialize_route(route, "LNKA", lnk_idx, 1));
if (is_pci0_prt) {
Aml *if_device_1, *if_pin_4, *else_pin_4;
/* device 1 is the power-management device, needs SCI */
if_device_1 = aml_if(aml_equal(lnk_idx, aml_int(1)));
{
if_pin_4 = aml_if(aml_equal(pin, aml_int(4)));
{
aml_append(if_pin_4,
aml_store(build_prt_entry("LNKS"), route));
}
aml_append(if_device_1, if_pin_4);
else_pin_4 = aml_else();
{
aml_append(else_pin_4,
aml_store(build_prt_entry("LNKA"), route));
}
aml_append(if_device_1, else_pin_4);
}
aml_append(while_ctx, if_device_1);
} else {
aml_append(while_ctx, initialize_route(route, "LNKA", lnk_idx, 1));
}
aml_append(while_ctx, initialize_route(route, "LNKB", lnk_idx, 2));
aml_append(while_ctx, initialize_route(route, "LNKC", lnk_idx, 3));
@ -1474,6 +1509,10 @@ static void build_piix4_pci0_int(Aml *table)
Aml *method;
uint32_t irqs;
Aml *sb_scope = aml_scope("_SB");
Aml *pci0_scope = aml_scope("PCI0");
aml_append(pci0_scope, build_prt(true));
aml_append(sb_scope, pci0_scope);
field = aml_field("PCI0.ISA.P40C", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
aml_append(field, aml_named_field("PRQ0", 8));
@ -1698,7 +1737,7 @@ build_ssdt(GArray *table_data, GArray *linker,
aml_append(dev, aml_name_decl("_PXM", aml_int(numa_node)));
}
aml_append(dev, build_prt());
aml_append(dev, build_prt(false));
crs = build_crs(PCI_HOST_BRIDGE(BUS(bus)->parent),
io_ranges, mem_ranges);
aml_append(dev, aml_name_decl("_CRS", crs));

60
hw/i386/acpi-dsdt.dsl
View File

@ -78,64 +78,4 @@ DefinitionBlock (
/* Hotplug notification method supplied by SSDT */
External(\_SB.PCI0.PCNT, MethodObj)
}
/****************************************************************
* PCI IRQs
****************************************************************/
Scope(\_SB) {
Scope(PCI0) {
Method (_PRT, 0) {
Store(Package(128) {}, Local0)
Store(Zero, Local1)
While(LLess(Local1, 128)) {
// slot = pin >> 2
Store(ShiftRight(Local1, 2), Local2)
// lnk = (slot + pin) & 3
Store(And(Add(Local1, Local2), 3), Local3)
If (LEqual(Local3, 0)) {
Store(Package(4) { Zero, Zero, LNKD, Zero }, Local4)
}
If (LEqual(Local3, 1)) {
// device 1 is the power-management device, needs SCI
If (LEqual(Local1, 4)) {
Store(Package(4) { Zero, Zero, LNKS, Zero }, Local4)
} Else {
Store(Package(4) { Zero, Zero, LNKA, Zero }, Local4)
}
}
If (LEqual(Local3, 2)) {
Store(Package(4) { Zero, Zero, LNKB, Zero }, Local4)
}
If (LEqual(Local3, 3)) {
Store(Package(4) { Zero, Zero, LNKC, Zero }, Local4)
}
// Complete the interrupt routing entry:
// Package(4) { 0x[slot]FFFF, [pin], [link], 0) }
Store(Or(ShiftLeft(Local2, 16), 0xFFFF), Index(Local4, 0))
Store(And(Local1, 3), Index(Local4, 1))
Store(Local4, Index(Local0, Local1))
Increment(Local1)
}
Return(Local0)
}
}
External(PRQ0, FieldUnitObj)
External(PRQ1, FieldUnitObj)
External(PRQ2, FieldUnitObj)
External(PRQ3, FieldUnitObj)
External(LNKA, DeviceObj)
External(LNKB, DeviceObj)
External(LNKC, DeviceObj)
External(LNKD, DeviceObj)
External(LNKS, DeviceObj)
}
}