kernel/arm64: Add kernel support for Samsung UART

Tested on M1 MacBook Air.

Change-Id: Idda9b2a168642b55a9e30336be1c4f4936670035
Reviewed-on: https://review.haiku-os.org/c/haiku/+/10487
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: waddlesplash <[email protected]>

headers/private/kernel/arch/arm64/arch_uart_samsung.h

@@ -38,4 +38,7 @@ private:
 };
 
 
+ArchUARTSamsung *arch_get_uart_samsung(addr_t base, int64 clock);
+
+
 #endif

src/system/kernel/arch/arm64/Jamfile

@@ -39,6 +39,7 @@ KernelMergeObject kernel_arch_arm64.o :
 #	arch_uart_8250_omap.cpp
 	arch_uart_pl011.cpp
 	arch_uart_linflex.cpp
+	arch_uart_samsung.cpp
 
 	:
 	$(TARGET_KERNEL_PIC_CCFLAGS) -Wno-unused

src/system/kernel/arch/arm64/arch_debug_console.cpp

@@ -8,6 +8,7 @@
 // #include <arch/arm/arch_uart_8250_omap.h>
 #include <arch/arm/arch_uart_pl011.h>
 #include <arch/arm64/arch_uart_linflex.h>
+#include <arch/arm64/arch_uart_samsung.h>
 #include <boot/kernel_args.h>
 #include <kernel.h>
 #include <vm/vm.h>
@@ -114,6 +115,10 @@ arch_debug_console_init(kernel_args *args)
 		sizeof(args->arch_args.uart.kind)) == 0) {
 		sArchDebugUART = arch_get_uart_8250(args->arch_args.uart.regs.start,
 			args->arch_args.uart.clock);
+	} else if (strncmp(args->arch_args.uart.kind, UART_KIND_SAMSUNG,
+		sizeof(args->arch_args.uart.kind)) == 0) {
+		sArchDebugUART = arch_get_uart_samsung(args->arch_args.uart.regs.start,
+			args->arch_args.uart.clock);
 	}
 
 	// Oh well.

src/system/kernel/arch/arm64/arch_uart_samsung.cpp

@@ -8,6 +8,7 @@
 
 #include <arch/generic/debug_uart.h>
 #include <arch/arm64/arch_uart_samsung.h>
+#include <new>
 
 
 #define ULCON    0x00 // Line control
@@ -131,3 +132,12 @@ void
 ArchUARTSamsung::FlushRx()
 {
 }
+
+
+ArchUARTSamsung*
+arch_get_uart_samsung(addr_t base, int64 clock)
+{
+	static char buffer[sizeof(ArchUARTSamsung)];
+	ArchUARTSamsung* uart = new(buffer) ArchUARTSamsung(base, clock);
+	return uart;
+}