| Message ID | 20240907073037.243353-1-maobibo@loongson.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/loongarch: Add acpi SPCR table support | expand |
在 2024/9/7 下午3:30, Bibo Mao 写道: > Serial port console redirection table can be used for default serial > port selection, like chosen stdout-path selection with FDT method. > > With acpi SPCR table added, early debug console can be parsed from > SPCR table with simple kernel parameter earlycon rather than > earlycon=uart,mmio,0x1fe001e0 > > Signed-off-by: Bibo Mao <maobibo@loongson.cn> > --- > hw/loongarch/acpi-build.c | 40 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 40 insertions(+) Reviewed-by: Song Gao <gaosong@loongson.cn> Thanks Song Gao > diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c > index 2638f87434..3912c8d307 100644 > --- a/hw/loongarch/acpi-build.c > +++ b/hw/loongarch/acpi-build.c > @@ -241,6 +241,44 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine) > acpi_table_end(linker, &table); > } > > +/* > + * Serial Port Console Redirection Table (SPCR) > + * https://learn.microsoft.com/en-us/windows-hardware/drivers/serports/serial-port-console-redirection-table > + */ > +static void > +spcr_setup(GArray *table_data, BIOSLinker *linker, MachineState *machine) > +{ > + LoongArchVirtMachineState *lvms; > + AcpiSpcrData serial = { > + .interface_type = 0, /* 16550 compatible */ > + .base_addr.id = AML_AS_SYSTEM_MEMORY, > + .base_addr.width = 32, > + .base_addr.offset = 0, > + .base_addr.size = 1, > + .base_addr.addr = VIRT_UART_BASE, > + .interrupt_type = 0, /* Interrupt not supported */ > + .pc_interrupt = 0, > + .interrupt = VIRT_UART_IRQ, > + .baud_rate = 7, /* 115200 */ > + .parity = 0, > + .stop_bits = 1, > + .flow_control = 0, > + .terminal_type = 3, /* ANSI */ > + .language = 0, /* Language */ > + .pci_device_id = 0xffff, /* not a PCI device*/ > + .pci_vendor_id = 0xffff, /* not a PCI device*/ > + .pci_bus = 0, > + .pci_device = 0, > + .pci_function = 0, > + .pci_flags = 0, > + .pci_segment = 0, > + }; > + > + lvms = LOONGARCH_VIRT_MACHINE(machine); > + build_spcr(table_data, linker, &serial, 2, lvms->oem_id, > + lvms->oem_table_id); > +} > + > typedef > struct AcpiBuildState { > /* Copy of table in RAM (for patching). */ > @@ -477,6 +515,8 @@ static void acpi_build(AcpiBuildTables *tables, MachineState *machine) > > acpi_add_table(table_offsets, tables_blob); > build_srat(tables_blob, tables->linker, machine); > + acpi_add_table(table_offsets, tables_blob); > + spcr_setup(tables_blob, tables->linker, machine); > > if (machine->numa_state->num_nodes) { > if (machine->numa_state->have_numa_distance) { > > base-commit: 7b87a25f49a301d3377f3e71e0b4a62540c6f6e4
diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c index 2638f87434..3912c8d307 100644 --- a/hw/loongarch/acpi-build.c +++ b/hw/loongarch/acpi-build.c @@ -241,6 +241,44 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine) acpi_table_end(linker, &table); } +/* + * Serial Port Console Redirection Table (SPCR) + * https://learn.microsoft.com/en-us/windows-hardware/drivers/serports/serial-port-console-redirection-table + */ +static void +spcr_setup(GArray *table_data, BIOSLinker *linker, MachineState *machine) +{ + LoongArchVirtMachineState *lvms; + AcpiSpcrData serial = { + .interface_type = 0, /* 16550 compatible */ + .base_addr.id = AML_AS_SYSTEM_MEMORY, + .base_addr.width = 32, + .base_addr.offset = 0, + .base_addr.size = 1, + .base_addr.addr = VIRT_UART_BASE, + .interrupt_type = 0, /* Interrupt not supported */ + .pc_interrupt = 0, + .interrupt = VIRT_UART_IRQ, + .baud_rate = 7, /* 115200 */ + .parity = 0, + .stop_bits = 1, + .flow_control = 0, + .terminal_type = 3, /* ANSI */ + .language = 0, /* Language */ + .pci_device_id = 0xffff, /* not a PCI device*/ + .pci_vendor_id = 0xffff, /* not a PCI device*/ + .pci_bus = 0, + .pci_device = 0, + .pci_function = 0, + .pci_flags = 0, + .pci_segment = 0, + }; + + lvms = LOONGARCH_VIRT_MACHINE(machine); + build_spcr(table_data, linker, &serial, 2, lvms->oem_id, + lvms->oem_table_id); +} + typedef struct AcpiBuildState { /* Copy of table in RAM (for patching). */ @@ -477,6 +515,8 @@ static void acpi_build(AcpiBuildTables *tables, MachineState *machine) acpi_add_table(table_offsets, tables_blob); build_srat(tables_blob, tables->linker, machine); + acpi_add_table(table_offsets, tables_blob); + spcr_setup(tables_blob, tables->linker, machine); if (machine->numa_state->num_nodes) { if (machine->numa_state->have_numa_distance) {
Serial port console redirection table can be used for default serial port selection, like chosen stdout-path selection with FDT method. With acpi SPCR table added, early debug console can be parsed from SPCR table with simple kernel parameter earlycon rather than earlycon=uart,mmio,0x1fe001e0 Signed-off-by: Bibo Mao <maobibo@loongson.cn> --- hw/loongarch/acpi-build.c | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) base-commit: 7b87a25f49a301d3377f3e71e0b4a62540c6f6e4