[SeaBIOS] [Qemu-devel] [PATCH RFC V2 03/17] hw/apci: add _PRT method for extra root busses
Marcel Apfelbaum
marcel at redhat.com
Mon Feb 16 10:54:03 CET 2015
Signed-off-by: Marcel Apfelbaum <marcel at redhat.com>
---
hw/i386/acpi-build.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 77 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index fedcb2e..ee1a50a 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -643,6 +643,82 @@ static void build_append_pci_bus_devices(AcpiAml *parent_scope, PCIBus *bus,
aml_append(parent_scope, method);
}
+static AcpiAml build_prt(void)
+{
+ AcpiAml method, pkg, if_ctx, while_ctx;
+
+ method = acpi_method("_PRT", 0);
+
+ aml_append(&method, acpi_store(acpi_package(128), acpi_local0()));
+ aml_append(&method, acpi_store(acpi_int(0), acpi_local1()));
+ while_ctx = acpi_while(acpi_lless(acpi_local1(), acpi_int(128)));
+ {
+ aml_append(&while_ctx,
+ acpi_store(acpi_shiftright(acpi_local1(), 2),
+ acpi_local2()));
+ aml_append(&while_ctx, acpi_store(
+ acpi_and(acpi_add(acpi_local1(), acpi_local2()), acpi_int(3)), acpi_local3()));
+
+ if_ctx = acpi_if(acpi_equal(acpi_local3(), acpi_int(0)));
+ {
+ pkg = acpi_package(4);
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_name("LNKD"));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&if_ctx, acpi_store(pkg, acpi_local4()));
+ }
+ aml_append(&while_ctx, if_ctx);
+
+ if_ctx = acpi_if(acpi_equal(acpi_local3(), acpi_int(1)));
+ {
+ pkg = acpi_package(4);
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_name("LNKA"));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&if_ctx, acpi_store(pkg, acpi_local4()));
+ }
+ aml_append(&while_ctx, if_ctx);
+
+ if_ctx = acpi_if(acpi_equal(acpi_local3(), acpi_int(2)));
+ {
+ pkg = acpi_package(4);
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_name("LNKB"));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&if_ctx, acpi_store(pkg, acpi_local4()));
+ }
+ aml_append(&while_ctx, if_ctx);
+
+ if_ctx = acpi_if(acpi_equal(acpi_local3(), acpi_int(3)));
+ {
+ pkg = acpi_package(4);
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&pkg, acpi_name("LNKC"));
+ aml_append(&pkg, acpi_int(0));
+ aml_append(&if_ctx, acpi_store(pkg, acpi_local4()));
+ }
+ aml_append(&while_ctx, if_ctx);
+
+ aml_append(&while_ctx, acpi_store(
+ acpi_or(acpi_shiftleft(acpi_local2(), 16), acpi_int(0xFFFF)),
+ acpi_index(acpi_local4(), acpi_int(0))));
+ aml_append(&while_ctx, acpi_store(
+ acpi_and(acpi_local1(), acpi_int(3)),
+ acpi_index(acpi_local4(), acpi_int(1))));
+ aml_append(&while_ctx, acpi_store(
+ acpi_local4(), acpi_index(acpi_local0(), acpi_local1())));
+ aml_append(&while_ctx, acpi_increment(acpi_local1()));
+ }
+ aml_append(&method, while_ctx);
+ aml_append(&method, acpi_return(acpi_local0()));
+
+ return method;
+ }
+
static void
build_ssdt(AcpiAml *table_aml, GArray *linker,
AcpiCpuInfo *cpu, AcpiPmInfo *pm, AcpiMiscInfo *misc,
@@ -687,6 +763,7 @@ build_ssdt(AcpiAml *table_aml, GArray *linker,
aml_append(&dev, acpi_name_decl("_HID", acpi_string("PNP0A03")));
aml_append(&dev,
acpi_name_decl("_BBN", acpi_int((uint8_t)bus_info->bus)));
+ aml_append(&dev, build_prt());
aml_append(&scope, dev);
aml_append(&ssdt, scope);
}
--
2.1.0
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