From 9b2a78fa52249ab481493550490aa5f37872dcf6 Mon Sep 17 00:00:00 2001
From: aqua <aqua@iserlohn-fortress.net>
Date: Sat, 10 Dec 2022 20:56:57 +0200
Subject: Rewrite drivers/uart and drivers/vga in cpp

---
 i686/sys/cpuid.h |  2 +-
 i686/sys/io.h    | 23 +++++++++++++++++++++++
 i686/sys/io.hpp  | 15 +++++++++++++++
 3 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 i686/sys/io.hpp

(limited to 'i686/sys')

diff --git a/i686/sys/cpuid.h b/i686/sys/cpuid.h
index 862601f..65b43c6 100644
--- a/i686/sys/cpuid.h
+++ b/i686/sys/cpuid.h
@@ -12,7 +12,7 @@ struct CPUVersion {
   unsigned int family_ex : 8;
   unsigned int __unused_2 : 4;
 } __attribute__((packed, aligned(__alignof__(unsigned int))));
-_Static_assert(sizeof(struct CPUVersion) == sizeof(unsigned int), "cpuid version struct size");
+// FIXME _Static_assert(sizeof(struct CPUVersion) == sizeof(unsigned int), "cpuid version struct size");
 
 unsigned int
 family(const struct CPUVersion v)
diff --git a/i686/sys/io.h b/i686/sys/io.h
index 74d4950..b6c24c5 100644
--- a/i686/sys/io.h
+++ b/i686/sys/io.h
@@ -1,5 +1,27 @@
 #pragma once
 
+// port listings
+enum UART {
+  COM1 = 0x3f8,
+  COM2 = 0x2f8,
+  COM3 = 0x3e8,
+  COM4 = 0x2e8,
+  COM5 = 0x5f8,
+  COM6 = 0x4f8,
+  COM7 = 0x5e8,
+  COM8 = 0x4e8,
+};
+enum UARTPortOffset {
+  Data = 0,             // read from receive buffer / write to transmit buffer | BaudDiv_l
+  InterruptControl = 1, // interrupt enable | BaudDiv_h
+  FifoControl = 2,      // interrupt ID and FIFO control
+  LineControl = 3,      // most significant bit is the DLAB
+  ModemControl = 4,
+  LineStatus = 5,
+  ModemStatus = 6,
+  Scratch = 7,
+};
+
 static inline void
 outb(unsigned char val, unsigned short port)
 {
@@ -77,3 +99,4 @@ insl(unsigned short port, void *__buf, unsigned long __n)
 {
   asm volatile("cld; rep; insl" : "+D"(__buf), "+c"(__n) : "d"(port));
 }
+
diff --git a/i686/sys/io.hpp b/i686/sys/io.hpp
new file mode 100644
index 0000000..bea9323
--- /dev/null
+++ b/i686/sys/io.hpp
@@ -0,0 +1,15 @@
+#pragma once
+
+template <typename T, unsigned short port> struct Port {
+  static void
+  out(T val, unsigned short offset = 0)
+  {
+    outb(val, port + offset);
+  }
+
+  static auto
+  in(unsigned short offset = 0)
+  {
+    return inb(port + offset);
+  }
+};
-- 
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