Add the acpi table to the loongson rtc hardware so that the virtual machine kernel can use the loongson RTC-related drivers.
Signed-off-by: Xianglai Li <[email protected]> --- Cc: Song Gao <[email protected]> Cc: Bibo Mao <[email protected]> Cc: Jiaxun Yang <[email protected]> Cc: Huacai Chen <[email protected]> hw/loongarch/virt-acpi-build.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/hw/loongarch/virt-acpi-build.c b/hw/loongarch/virt-acpi-build.c index 3e34bedcd6..42820001d7 100644 --- a/hw/loongarch/virt-acpi-build.c +++ b/hw/loongarch/virt-acpi-build.c @@ -460,6 +460,30 @@ static void acpi_dsdt_add_tpm(Aml *scope, LoongArchVirtMachineState *vms) } #endif +static void acpi_dsdt_add_rtc(Aml *scope) +{ + Aml *dev = aml_device("RTC"); + + aml_append(dev, aml_name_decl("_HID", aml_string("LOON0001"))); + aml_append(dev, aml_name_decl("_UID", aml_int(0))); + + Aml *crs = aml_resource_template(); + aml_append(crs, + aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED, + AML_NON_CACHEABLE, AML_READ_WRITE, + 0, VIRT_RTC_REG_BASE, + VIRT_RTC_REG_BASE + VIRT_RTC_LEN - 1, + 0, VIRT_RTC_LEN)); + /* + * The virtual machine model does not support suspend and wake-up, + * and rtc is no longer the wake-up source. Therefore, the current + * rtc table no longer provides the rtc alarm interrupt number to + * avoid the software initializing alarm. + */ + aml_append(dev, aml_name_decl("_CRS", crs)); + aml_append(scope, dev); +} + /* build DSDT */ static void build_dsdt(GArray *table_data, BIOSLinker *linker, MachineState *machine) @@ -475,6 +499,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, MachineState *machine) for (i = 0; i < VIRT_UART_COUNT; i++) { build_uart_device_aml(dsdt, i); } + acpi_dsdt_add_rtc(dsdt); build_pci_device_aml(dsdt, lvms); build_la_ged_aml(dsdt, machine); build_flash_aml(dsdt, lvms); -- 2.39.1
