From 66eedf1200c4af0eccd450fbfb51a2b667d32275 Mon Sep 17 00:00:00 2001
From: Achilleas Anagnostopoulos <achilleas.imap.mbox@gmail.com>
Date: Thu, 30 Mar 2017 08:37:03 +0100
Subject: [PATCH] Initialize a minimal terminal attached to a text console
 device

---
 kernel/hal/hal.go | 21 +++++++++++++++++++++
 kernel/kmain.go   |  5 +++++
 2 files changed, 26 insertions(+)

diff --git a/kernel/hal/hal.go b/kernel/hal/hal.go
index e69de29..61bdc9e 100644
--- a/kernel/hal/hal.go
+++ b/kernel/hal/hal.go
@@ -0,0 +1,21 @@
+package hal
+
+import (
+	"github.com/achilleasa/gopher-os/kernel/driver/tty"
+	"github.com/achilleasa/gopher-os/kernel/driver/video/console"
+	"github.com/achilleasa/gopher-os/kernel/hal/multiboot"
+)
+
+var (
+	egaConsole     = &console.Ega{}
+	ActiveTerminal = &tty.Vt{}
+)
+
+// InitTerminal provides a basic terminal to allow the kernel to emit some output
+// till everything is properly setup
+func InitTerminal() {
+	fbInfo := multiboot.GetFramebufferInfo()
+
+	egaConsole.Init(uint16(fbInfo.Width), uint16(fbInfo.Height), uintptr(fbInfo.PhysAddr))
+	ActiveTerminal.AttachTo(egaConsole)
+}
diff --git a/kernel/kmain.go b/kernel/kmain.go
index f0ebda4..3f1127b 100644
--- a/kernel/kmain.go
+++ b/kernel/kmain.go
@@ -3,6 +3,7 @@ package kernel
 import (
 	_ "unsafe" // required for go:linkname
 
+	"github.com/achilleasa/gopher-os/kernel/hal"
 	"github.com/achilleasa/gopher-os/kernel/hal/multiboot"
 )
 
@@ -19,4 +20,8 @@ import (
 //go:noinline
 func Kmain(multibootInfoPtr uint32) {
 	multiboot.SetInfoPtr(uintptr(multibootInfoPtr))
+
+	// Initialize and clear the terminal
+	hal.InitTerminal()
+	hal.ActiveTerminal.Clear()
 }