arm64: Discover UART device from ACPI.

Change-Id: I4e97b05dcfcaf6abddff81fbbf676c38fe337775 Reviewed-on: https://review.haiku-os.org/c/haiku/+/5271 Tested-by: Commit checker robot <[email protected]> Reviewed-by: Adrien Destugues <[email protected]>
2022-07-24 07:56:07 +00:00
parent 08fdc76a61
commit 17f0f4b68f
6 changed files with 115 additions and 5 deletions
@@ -10,6 +10,7 @@
 #define ACPI_RSDT_SIGNATURE		"RSDT"
 #define ACPI_XSDT_SIGNATURE		"XSDT"
 #define ACPI_MADT_SIGNATURE		"APIC"
+#define ACPI_SPCR_SIGNATURE		"SPCR"

 #define ACPI_LOCAL_APIC_ENABLED	0x01

@@ -202,5 +203,41 @@ typedef struct acpi_local_x2_apic_nmi {
 	uint8	reserved3;				/* reserved (must be set to zero) */
 } _PACKED acpi_local_x2_apic_nmi;

+typedef struct acpi_gas {
+	uint8 address_space_id;
+	uint8 bit_width;
+	uint8 bit_offset;
+	uint8 access_size;
+	uint64 address;
+} _PACKED acpi_gas;
+
+typedef struct acpi_spcr {
+	acpi_descriptor_header header;
+	uint32 interface_type;
+	acpi_gas base_address;
+	uint8 interrupt_type;
+	uint8 irq;
+	uint32 gisv;
+	uint8 baud;
+	uint8 parity;
+	uint8 stop_bits;
+	uint8 flow_control;
+	uint8 terminal_type;
+	uint8 language;
+	uint16 pci_device_id;
+	uint16 pci_vendor_id;
+	uint8 pci_bus_num;
+	uint8 pci_vendor_num;
+	uint8 pci_function_num;
+	uint32 pci_flags;
+	uint8 pci_segment;
+	uint32 clock;
+} _PACKED acpi_spcr;
+
+enum {
+	ACPI_SPCR_INTERFACE_TYPE_16550 = 0,
+	ACPI_SPCR_INTERFACE_TYPE_PL011 = 3,
+};
+

 #endif	/* _KERNEL_ACPI_H */
@@ -0,0 +1,15 @@
+/*
+ * Copyright 2021 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef KERNEL_BOOT_PLATFORM_EFI_ARCH_ACPI_H
+#define KERNEL_BOOT_PLATFORM_EFI_ARCH_ACPI_H
+
+
+#include <SupportDefs.h>
+
+
+void arch_handle_acpi(void);
+
+
+#endif /* KERNEL_BOOT_PLATFORM_EFI_ARCH_ACPI_H */