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[Qemu-devel] [PATCH V6 for-2.3 16/26] hw/apci: add _PRT method for extra
From: |
Marcel Apfelbaum |
Subject: |
[Qemu-devel] [PATCH V6 for-2.3 16/26] hw/apci: add _PRT method for extra PCI root busses |
Date: |
Thu, 19 Mar 2015 20:52:51 +0200 |
Signed-off-by: Marcel Apfelbaum <address@hidden>
---
hw/i386/acpi-build.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index ecd5684..4964d6b 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -654,6 +654,86 @@ static void build_append_pci_bus_devices(Aml
*parent_scope, PCIBus *bus,
aml_append(parent_scope, method);
}
+/*
+ * initialize_route - Initialize the interrupt routing rule
+ * through a specific LINK:
+ * if (lnk_idx == idx)
+ * route using link 'link_name'
+ */
+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_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;
+}
+
+/*
+ * build_prt - Define interrupt rounting rules
+ *
+ * Returns an array of 128 routes, one for each device,
+ * based on device location.
+ * The main goal is to equaly distribute the interrupts
+ * over the 4 existing ACPI links (works only for i440fx).
+ * The hash function is (slot + pin) & 3 -> "LNK[D|A|B|C]".
+ *
+ */
+static Aml *build_prt(void)
+{
+ Aml *method, *while_ctx, *pin, *res;
+
+ method = aml_method("_PRT", 0);
+ res = aml_local(0);
+ pin = aml_local(1);
+ aml_append(method, aml_store(aml_package(128), res));
+ aml_append(method, aml_store(aml_int(0), pin));
+
+ /* while (pin < 128) */
+ while_ctx = aml_while(aml_lless(pin, aml_int(128)));
+ {
+ Aml *slot = aml_local(2);
+ Aml *lnk_idx = aml_local(3);
+ Aml *route = aml_local(4);
+
+ /* slot = pin >> 2 */
+ aml_append(while_ctx,
+ aml_store(aml_shiftright(pin, aml_int(2)), slot));
+ /* lnk_idx = (slot + pin) & 3 */
+ aml_append(while_ctx,
+ aml_store(aml_and(aml_add(pin, slot), aml_int(3)),
lnk_idx));
+
+ /* 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));
+ aml_append(while_ctx, initialize_route(route, "LNKB", lnk_idx, 2));
+ aml_append(while_ctx, initialize_route(route, "LNKC", lnk_idx, 3));
+
+ /* route[0] = 0x[slot]FFFF */
+ aml_append(while_ctx,
+ aml_store(aml_or(aml_shiftleft(slot, aml_int(16)),
aml_int(0xFFFF)),
+ aml_index(route, aml_int(0))));
+ /* route[1] = pin & 3 */
+ aml_append(while_ctx,
+ aml_store(aml_and(pin, aml_int(3)), aml_index(route, aml_int(1))));
+ /* res[pin] = route */
+ aml_append(while_ctx, aml_store(route, aml_index(res, pin)));
+ /* pin++ */
+ aml_append(while_ctx, aml_increment(pin));
+ }
+ aml_append(method, while_ctx);
+ /* return res*/
+ aml_append(method, aml_return(res));
+
+ return method;
+}
+
static void
build_ssdt(GArray *table_data, GArray *linker,
AcpiCpuInfo *cpu, AcpiPmInfo *pm, AcpiMiscInfo *misc,
@@ -692,6 +772,7 @@ build_ssdt(GArray *table_data, GArray *linker,
aml_name_decl("_UID", aml_string("PC%.02X", bus_num)));
aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A03")));
aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
+ aml_append(dev, build_prt());
aml_append(scope, dev);
aml_append(ssdt, scope);
}
--
2.1.0
- [Qemu-devel] [PATCH V6 for-2.3 04/26] acpi: add aml_index() term, (continued)
- [Qemu-devel] [PATCH V6 for-2.3 04/26] acpi: add aml_index() term, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 03/26] acpi: add aml_lless() term, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 05/26] acpi: add aml_shiftleft() term, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 07/26] acpi: add aml_increment() term, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 09/26] hw/pci: move pci bus related code to separate files, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 08/26] acpi: add aml_while() term, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 13/26] hw/pci-host: introduce TYPE_PCI_HOST_BRIDGE_SNOOPED interface, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 14/26] hw/pci-host/piix: implement TYPE_PCI_HOST_BRIDGE_SNOOPED interface, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 10/26] hw/pci: made pci_bus_is_root a PCIBusClass method, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 11/26] hw/pci: made pci_bus_num a PCIBusClass method, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 16/26] hw/apci: add _PRT method for extra PCI root busses,
Marcel Apfelbaum <=
- [Qemu-devel] [PATCH V6 for-2.3 15/26] hw/acpi: add support for i440fx 'snooping' root busses, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 12/26] hw/pci: introduce TYPE_PCI_MAIN_HOST_BRIDGE interface, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 17/26] hw/acpi: add _CRS method for extra root busses, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 19/26] hw/pci: removed 'rootbus nr is 0' assumption from qmp_pci_query, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 21/26] hw/pci: inform bios if the system has extra pci root buses, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 18/26] hw/acpi: remove from root bus 0 the crs resources used by other busses., Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 25/26] apci: fix PXB behaviour if used with unsupported BIOS, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 22/26] hw/pxb: add map_irq func, Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 20/26] hw/pci: introduce PCI Expander Bridge (PXB), Marcel Apfelbaum, 2015/03/19
- [Qemu-devel] [PATCH V6 for-2.3 24/26] hw/pxb: add numa_node parameter, Marcel Apfelbaum, 2015/03/19