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| author | Bibo Mao <maobibo@loongson.cn> | 2024-09-07 15:30:37 +0800 |
|---|---|---|
| committer | Song Gao <gaosong@loongson.cn> | 2024-09-12 20:57:54 +0800 |
| commit | 45d1fe46e5a6fe2b22b034e2b2bc0d941acd4b9e (patch) | |
| tree | 938378d5ef7df6dd92ea17e51d6c45a982907f01 /hw | |
| parent | d9bd1ccbf1d84d872aed684c65fec33814b8ac1b (diff) | |
| download | qemu-45d1fe46e5a6fe2b22b034e2b2bc0d941acd4b9e.zip qemu-45d1fe46e5a6fe2b22b034e2b2bc0d941acd4b9e.tar.gz qemu-45d1fe46e5a6fe2b22b034e2b2bc0d941acd4b9e.tar.bz2 | |
hw/loongarch: Add acpi SPCR table support
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>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20240907073037.243353-1-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/loongarch/acpi-build.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c index 04107c8..50709bd 100644 --- a/hw/loongarch/acpi-build.c +++ b/hw/loongarch/acpi-build.c @@ -242,6 +242,44 @@ 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). */ @@ -484,6 +522,8 @@ 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) { |