From fd9f87ddd469ef987fa309435601d93acbf24038 Mon Sep 17 00:00:00 2001
From: Adrien Bourmault <neox@os-k.eu>
Date: Sat, 23 Mar 2019 23:52:18 +0100
Subject: [PATCH] VGA initialization

---
 kaleid/include/kernel/base.h |  2 +-
 kaleid/kernel/init/init.c    | 41 +++++++++---------------------------
 kaleid/kernel/io/vga.c       | 12 +++++++----
 3 files changed, 19 insertions(+), 36 deletions(-)

diff --git a/kaleid/include/kernel/base.h b/kaleid/include/kernel/base.h
index a053f8f..e6efe12 100644
--- a/kaleid/include/kernel/base.h
+++ b/kaleid/include/kernel/base.h
@@ -107,7 +107,7 @@ struct BootInfo_t
         uint modulesCount;      //mods_count
         void *modulesAddr;      //mods_addr
         char *grubName;         //boot_loader_name
-        void *mbHeaderAddr;
+        void *kernelAddr;
     } btldr;
 
     // Informations about drives
diff --git a/kaleid/kernel/init/init.c b/kaleid/kernel/init/init.c
index 5a313de..0dac2bf 100644
--- a/kaleid/kernel/init/init.c
+++ b/kaleid/kernel/init/init.c
@@ -32,9 +32,7 @@
 //
 void InitBootInfo(multiboot_info_t *mbi)
 {
-    extern uint MB_header;
-    char *okStr = "available";
-    char *noStr = "unavailable";
+    extern void MB_header(void);
 
     // We need the multiboot structure
     KalAlwaysAssert(mbi);
@@ -44,7 +42,7 @@ void InitBootInfo(multiboot_info_t *mbi)
 
     if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_BOOT_LOADER_NAME) {
         GetBootInfo(btldr).grubName         = (char*)(ullong)(mbi->boot_loader_name);
-        GetBootInfo(btldr).mbHeaderAddr     = (void*)(ullong)&MB_header;
+        GetBootInfo(btldr).kernelAddr       = (void*)&MB_header;
         GetBootInfo(btldr).valid            = 1;
     }
     if (GetBootInfo(btldr).grubFlags & MULTIBOOT_INFO_MODS) {
@@ -103,28 +101,6 @@ void InitBootInfo(multiboot_info_t *mbi)
         GetBootInfo(firmware).apmTable      = mbi->apm_table;
         GetBootInfo(firmware).apmValid      = 1;
     }
-
-    //Now we check (debug)
-    /*DebugLog("[InitBootInfo] Flags :      %b\n\n",
-             GetBootInfo(btldr).grubFlags);*/
-    DebugLog("[InitBootInfo] Boot loader  %s\n",
-             GetBootInfo(btldr).valid ? okStr : noStr);
-    DebugLog("[InitBootInfo] Boot drive   %s\n",
-             GetBootInfo(drives).drvValid ? okStr : noStr);
-    DebugLog("[InitBootInfo] Disk buffer  %s\n",
-             GetBootInfo(drives).bufferValid ? okStr : noStr);
-    DebugLog("[InitBootInfo] Basic mem    %s\n",
-             GetBootInfo(memory).memValid ? okStr : noStr);
-    DebugLog("[InitBootInfo] Memory map   %s\n",
-             GetBootInfo(memory).mapValid ? okStr : noStr);
-    DebugLog("[InitBootInfo] Video infos  %s\n",
-             GetBootInfo(video).vbeValid ? okStr : noStr);
-    DebugLog("[InitBootInfo] Framebuffer  %s\n",
-             GetBootInfo(video).fbuValid ? okStr : noStr);
-    DebugLog("[InitBootInfo] ROM table    %s\n",
-             GetBootInfo(firmware).romValid ? okStr : noStr);
-    DebugLog("[InitBootInfo] APM table    %s\n\n",
-             GetBootInfo(firmware).apmValid ? okStr : noStr);
 }
 
 
@@ -136,6 +112,9 @@ noreturn void StartKern(multiboot_info_t *mbInfo, int mbMagic)
     // We're not ready to deal with interrupts
     DisableIRQs();
 
+    //Initialize the BootInfo_t structure
+    InitBootInfo(mbInfo);
+
     // Kernel terminals
     InitTerms();
 
@@ -143,10 +122,10 @@ noreturn void StartKern(multiboot_info_t *mbInfo, int mbMagic)
     KernLog("%c%c%c OS/K\n\n", 219, 219, 219);
 
     KalAlwaysAssert(mbMagic == MULTIBOOT_BOOTLOADER_MAGIC);
-    KernLog("[Init] We have magic : %x\n\n", mbMagic);
-
-    //Initialize the BootInfo_t structure
-    InitBootInfo(mbInfo);
+    KernLog("[Init] Kernel successfully loaded at %p with %x magic\n\n",
+            GetBootInfo(btldr).kernelAddr,
+            mbMagic
+            );
 
     //Memory mapping
     error_t mapBad = InitMemoryMap();
@@ -154,6 +133,6 @@ noreturn void StartKern(multiboot_info_t *mbInfo, int mbMagic)
         StartPanic("[Init] The memory map failed to initialize. Error : %d", mapBad);
 
     // We're out
-    KernLog("\n[Init] Evil never dies !");
+    KernLog("\n[Init] Evil never dies !\n");
     CrashSystem(); //yay
 }
diff --git a/kaleid/kernel/io/vga.c b/kaleid/kernel/io/vga.c
index 600eae0..b24f876 100644
--- a/kaleid/kernel/io/vga.c
+++ b/kaleid/kernel/io/vga.c
@@ -76,9 +76,9 @@ Terminal_t VGA_Terminal = {
     .name       = "VGA Output Terminal",
     .type       = "VGA",
 
-    .data       = (void *)0xB8000,
-    .width      = 80,
-    .height     = 25,
+    .data       = (void *)0,
+    .width      = 0,
+    .height     = 0,
     .currentX   = 0,
     .currentY   = 0,
 
@@ -90,7 +90,6 @@ Terminal_t VGA_Terminal = {
     .putchar    = VGA_PutOnTermUnlocked,
 };
 
-
 //
 // Initialize VGA output
 //
@@ -98,6 +97,11 @@ void VGA_Init(void)
 {
     KalAssert(VGA_Terminal.initDone != INITOK);
 
+    //Use the infos provided in the BootInfo_t structure
+    VGA_Terminal.data   = GetBootInfo(video).framebufferAddr;
+    VGA_Terminal.width  = GetBootInfo(video).framebufferWidth;
+    VGA_Terminal.height = GetBootInfo(video).framebufferHeight;
+
     VGA_Terminal.initDone = INITOK;
 }