kernel/uart: Clean up uarts, make calling convention consistent

Change-Id: I36ef92ef13edb0b006344db74e9d1b3ae52e0127
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4327
Reviewed-by: X512 <[email protected]>
Reviewed-by: Jessica Hamilton <[email protected]>
Tested-by: Commit checker robot <[email protected]>

headers/private/kernel/arch/arm/arch_uart_8250_omap.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2012-2021 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		François Revol, [email protected]
+ *		Alexander von Gluck IV, [email protected]
+ */
+#ifndef _KERNEL_ARCH_DEBUG_UART_8250_OMAP_H
+#define _KERNEL_ARCH_DEBUG_UART_8250_OMAP_H
+
+
+#include <sys/types.h>
+
+#include <SupportDefs.h>
+#include <arch/generic/debug_uart_8250.h>
+
+#include "debug_uart.h"
+
+
+class ArchUART8250Omap : public DebugUART8250 {
+public:
+							ArchUART8250Omap(addr_t base, int64 clock);
+							~ArchUART8250Omap();
+	void					InitEarly();
+
+	// ARM MMIO: on ARM the UART regs are aligned on 32bit
+	virtual void			Out8(int reg, uint8 value);
+	virtual uint8			In8(int reg);
+};
+
+
+DebugUART8250* arch_get_uart_8250_omap(addr_t base, int64 clock);
+
+
+#endif /* _KERNEL_ARCH_DEBUG_UART_8250_OMAP_H */

headers/private/kernel/arch/generic/debug_uart_8250.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 Haiku, Inc. All rights reserved.
+ * Copyright 2012-2021 Haiku, Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -33,8 +33,7 @@ public:
 };
 
 
-extern DebugUART8250 *arch_get_uart_8250(addr_t base, int64 clock);
-extern DebugUART8250 *arch_get_uart_8250_omap(addr_t base, int64 clock);
+DebugUART8250* arch_get_uart_8250(addr_t base, int64 clock);
 
 
 #endif /* _KERNEL_ARCH_DEBUG_UART_8250_H */

headers/private/kernel/arch/riscv64/arch_uart_sifive.h

@@ -1,8 +1,7 @@
 /*
- * Copyright 2021, Haiku, Inc.
+ * Copyright 2021, Haiku, Inc. All rights reserved
  * Distributed under the terms of the MIT License.
  */
-
 #ifndef _ARCH_UART_SIFIVE_H_
 #define _ARCH_UART_SIFIVE_H_
 
@@ -97,4 +96,7 @@ ArchUARTSifive::Regs()
 }
 
 
+ArchUARTSifive* arch_get_uart_sifive(addr_t base, int64 clock);
+
+
 #endif	// _ARCH_UART_SIFIVE_H_