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[Qemu-devel] [PATCH v4 for-2.3 11/25] hw/apci: add _PRT method for extra
From: |
Marcel Apfelbaum |
Subject: |
[Qemu-devel] [PATCH v4 for-2.3 11/25] hw/apci: add _PRT method for extra PCI root busses |
Date: |
Sun, 8 Mar 2015 13:16:13 +0200 |
Signed-off-by: Marcel Apfelbaum <address@hidden>
---
hw/i386/acpi-build.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index e5709e8..e7a1a36 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -664,6 +664,70 @@ static void build_append_pci_bus_devices(Aml
*parent_scope, PCIBus *bus,
aml_append(parent_scope, method);
}
+static Aml *build_link(Aml *lnk, Aml *lnk_pkg, const char *link_name, int idx)
+{
+ Aml *if_ctx, *pkg;
+
+ if_ctx = aml_if(aml_equal(lnk, aml_int(idx)));
+ pkg = aml_package(4);
+ aml_append(pkg, aml_int(0));
+ aml_append(pkg, aml_int(0));
+ aml_append(pkg, aml_name(link_name, ""));
+ aml_append(pkg, aml_int(0));
+ aml_append(if_ctx, aml_store(pkg, lnk_pkg));
+
+ return if_ctx;
+}
+
+static Aml *build_prt(void)
+{
+ Aml *method, *while_ctx, *pin, *slot, *lnk, *pkg, *res;
+
+ method = aml_method("_PRT", 0);
+ res = aml_local(0);
+ pin = aml_local(1);
+ slot = aml_local(2);
+ lnk = aml_local(3);
+ pkg = aml_local(4);
+
+ 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)));
+ {
+ /* slot = pin >> 2 */
+ aml_append(while_ctx,
+ aml_store(aml_shiftright(pin, aml_int(2)), slot));
+ /* lnk = (slot + pin) & 3 */
+ aml_append(while_ctx,
+ aml_store(aml_and(aml_add(pin, slot), aml_int(3)), lnk));
+
+ /* pkg[2] = "LNK[A|B|C|D]", selection based on lnk % 3 */
+ aml_append(while_ctx, build_link(lnk, pkg, "LNKD", 0));
+ aml_append(while_ctx, build_link(lnk, pkg, "LNKA", 1));
+ aml_append(while_ctx, build_link(lnk, pkg, "LNKB", 2));
+ aml_append(while_ctx, build_link(lnk, pkg, "LNKC", 3));
+
+ /* pkg[0] = 0x[slot]FFFF */
+ aml_append(while_ctx,
+ aml_store(aml_or(aml_shiftleft(slot, aml_int(16)),
aml_int(0xFFFF)),
+ aml_index(pkg, aml_int(0))));
+ /* pkg[1] = pin & 3 */
+ aml_append(while_ctx,
+ aml_store(aml_and(pin, aml_int(3)), aml_index(pkg, aml_int(1))));
+ /* res[pin] = pkg */
+ aml_append(while_ctx, aml_store(pkg, 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,
@@ -708,6 +772,7 @@ build_ssdt(GArray *table_data, GArray *linker,
aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A03")));
aml_append(dev,
aml_name_decl("_BBN", aml_int((uint8_t)bus_info->bus)));
+ aml_append(dev, build_prt());
aml_append(scope, dev);
aml_append(ssdt, scope);
}
--
2.1.0
- Re: [Qemu-devel] [PATCH v4 for-2.3 05/25] acpi: add aml_index() term, (continued)
[Qemu-devel] [PATCH v4 for-2.3 12/25] hw/acpi: add _CRS method for extra root busses, Marcel Apfelbaum, 2015/03/08
[Qemu-devel] [PATCH v4 for-2.3 13/25] hw/acpi: remove from root bus 0 the crs resources used by other busses., Marcel Apfelbaum, 2015/03/08