From 50c7bdbe826b5b425748a11273d14e3aed2ce851 Mon Sep 17 00:00:00 2001
From: Michal Idziorek <m.i@gmx.at>
Date: Wed, 27 Aug 2014 03:20:16 +0200
Subject: many changes and adaptions and VESA mode !!

---
 kernel/console.c |   6 +++
 kernel/font.h    |   0
 kernel/kernel.c  |  26 +++++++++++--
 kernel/mem.c     |  14 +++++--
 kernel/vesa.c    | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 kernel/x86.h     |  11 +++---
 6 files changed, 157 insertions(+), 11 deletions(-)
 create mode 100644 kernel/font.h
 create mode 100644 kernel/vesa.c

(limited to 'kernel')

diff --git a/kernel/console.c b/kernel/console.c
index 42dc5d0..b1a9125 100644
--- a/kernel/console.c
+++ b/kernel/console.c
@@ -1,5 +1,7 @@
 #include "console.h"
 
+#define FOOLOS_CONSOLE
+
 static int posx=0;
 static int posy=0;
 
@@ -7,9 +9,11 @@ static int posy=0;
 
 void print_char_col(int x, int y, char c, char col)
 {
+#ifdef FOOLOS_CONSOLE
     char* video_mem=(char *)SCR_VIDEOMEM+(x+y*SCR_REAL_WIDTH)*2;
     video_mem[0]=c;
     video_mem[1]=col;
+#endif
 }
 
 void print_char(int x, int y, char c)
@@ -67,6 +71,7 @@ void scr_put_string_nl(char *str)
 
 void scr_nextline()
 {
+#ifdef FOOLOS_CONSOLE
     int i,x;
 
     posx=0;
@@ -95,6 +100,7 @@ void scr_nextline()
 
 	posy--;
     }
+#endif
 }
 
 void scr_put_char(char ch,char col)
diff --git a/kernel/font.h b/kernel/font.h
new file mode 100644
index 0000000..e69de29
diff --git a/kernel/kernel.c b/kernel/kernel.c
index 16028fd..f1ba6b7 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -42,7 +42,8 @@ void kernel_main()
     //timer_init();
 
     // we know that here the bootloader placed the mamory map!
-    mem_init(0x7c00+0x140);
+    mem_init(0x7c00+0x400,*((uint16_t *)(0x7c00+0x600)));
+    //mem_init(0x9000);
 
     // we know that here the bootloader placed the mamory map!
     vmem_init();
@@ -78,8 +79,11 @@ void kernel_main()
     // pci
     pci_init();
 
+    // vesa init
+    vesa_init(0x8300,0x8400);
+
     // floppy
-    floppy_init();
+    //floppy_init();
     scr_put_string_nl("");
 
 
@@ -87,11 +91,27 @@ void kernel_main()
     shell_init();
 
     // kernel main loop
+    uint8_t t=0;
+    
+//    while(1)
+ //   {
+    //}
+
+
     while(1)
     {
 
-	
+	int i;
+	int j;
+    for(i=0;i<1024;i++)
+
+    for(j=0;j<768;j++)
+    { 
+	PutPixel(i,j,t);
+    }
+	t+=125;
     }
+
  
 }
 
diff --git a/kernel/mem.c b/kernel/mem.c
index 28e05eb..68880be 100644
--- a/kernel/mem.c
+++ b/kernel/mem.c
@@ -205,20 +205,27 @@ void mem_test(int start, int end, int steps)
 }
 */
 
-void mem_init(uint16_t *memmap)
+void mem_init(uint16_t *memmap,uint16_t entries)
 {
 
+    scr_put_string("mem: the memory map contains ");
+    scr_put_hex(entries);
+    scr_put_string_nl(" entries.");
+
+    // hardcoded memory bitmap!!??!
     _mmngr_memory_map=0x9000;
     mem_free_blocks=0;
     pmmngr_init ();
 
     // count available memory
     uint32_t avail_mem=0;
+    int i;
 
     //print memory map and init regions!
-    while(1)
+    for(i=0;i<entries;i++)
     {
-	if(memmap[8]==0)break;
+
+//	if(memmap[8]==0)break;
 
 
 #ifdef MEM_PRINT_MEMORYMAP
@@ -247,6 +254,7 @@ void mem_init(uint16_t *memmap)
 	}
 
 	memmap+=12;
+	
     }
 
     scr_put_string("mem: Total Available Mem: ");
diff --git a/kernel/vesa.c b/kernel/vesa.c
new file mode 100644
index 0000000..93a42f3
--- /dev/null
+++ b/kernel/vesa.c
@@ -0,0 +1,111 @@
+//http://wiki.osdev.org/GUI
+#include "kernel.h"
+
+typedef struct vbeinfo_struct{
+   char VbeSignature[4];             // == "VESA"
+   uint16_t VbeVersion;                 // == 0x0300 for VBE 3.0
+   uint16_t OemStringPtr[2];            // isa vbeFarPtr
+   uint8_t Capabilities[4];
+   uint16_t VideoModePtr[2];         // isa vbeFarPtr
+   uint16_t TotalMemory;             // as # of 64KB blocks
+}vbeinfo;
+
+typedef struct ModeInfoBlock {
+  uint16_t attributes;
+  uint8_t winA,winB;
+  uint16_t granularity;
+  uint16_t winsize;
+  uint16_t segmentA, segmentB;
+  uint16_t realFctPtr[2];
+//  VBE_FAR(realFctPtr);
+  uint16_t pitch; // bytes per scanline
+ 
+  uint16_t Xres, Yres;
+  uint8_t Wchar, Ychar, planes, bpp, banks;
+  uint8_t memory_model, bank_size, image_pages;
+  uint8_t reserved0;
+ 
+  uint8_t red_mask, red_position;
+  uint8_t green_mask, green_position;
+  uint8_t blue_mask, blue_position;
+  uint8_t rsv_mask, rsv_position;
+  uint8_t directcolor_attributes;
+ 
+  uint32_t physbase;  // your LFB (Linear Framebuffer) address ;)
+  uint32_t reserved1;
+  uint16_t reserved2;
+}vbemodeinfo;
+
+static vbemodeinfo *VbeModeInfoBlock;
+
+void vesa_init(vbeinfo *info,vbemodeinfo *mode)
+{
+    int i=0;
+
+//    while(info[i].VbeSignature[0]=='V')
+ //   {
+	scr_put_string("vesa: init vbe version: ");
+	scr_put_hex(info[i].VbeVersion);
+	scr_put_string(" / videomode ptr:  ");
+	scr_put_hex(info[i].VideoModePtr[0]);
+	scr_put_hex(info[i].VideoModePtr[1]);
+	scr_put_string_nl("");
+
+//	i++;
+ //   }
+ //
+    int *modeptr=info[i].VideoModePtr[0]; // 0x8322; // do not hardcode !!! take from vbeinfo!
+
+    while(*modeptr!=0xffff&&*modeptr!=0)
+    {
+
+	scr_put_string("vesa: mode supported:  ");
+	scr_put_hex(*modeptr);
+	scr_put_string_nl("");
+
+	modeptr++;
+    }
+
+    scr_put_string("vesa: selected mode res: ");
+    scr_put_hex(mode->Xres);
+    scr_put_string(" x ");
+    scr_put_hex(mode->Yres);
+    scr_put_string_nl("");
+    scr_put_string("vesa: selected mode banks: ");
+    scr_put_hex(mode->banks);
+    scr_put_string_nl("");
+    scr_put_string("vesa: attribs: ");
+    scr_put_hex(mode->attributes);
+    scr_put_string_nl("");
+    scr_put_string("vesa: physbase: ");
+    scr_put_hex32(mode->physbase);
+    scr_put_string_nl("");
+    scr_put_string("vesa: bpp: ");
+    scr_put_hex(mode->bpp);
+    scr_put_string_nl("");
+/*
+uint8_t *videomem=mode->physbase;
+for(i=0;i<0xffffff;i++)
+{
+    videomem[i]=i;
+}
+*/
+    
+    VbeModeInfoBlock=mode;
+
+
+}
+
+void PutPixel(int x,int y, int color){
+
+    //do not write memory outside the screen buffer, check parameters against the VBE mode info
+    if (x<0 || x>VbeModeInfoBlock->Xres|| y<0 || y>VbeModeInfoBlock->Yres) return;
+//
+    if (x) x = (x*(VbeModeInfoBlock->bpp>>3)); // get bytes (divide by 8)
+    if (y) y = (y*VbeModeInfoBlock->pitch);
+    uint8_t *cTemp=VbeModeInfoBlock->physbase;
+    cTemp[x+y] =  (uint8_t)(color & 0xff);
+    cTemp[x+y+1] = (uint8_t)((color>>8) & 0xff);
+    cTemp[x+y+2] = (uint8_t)((color>>16) & 0xff);
+ }
+
diff --git a/kernel/x86.h b/kernel/x86.h
index 1e80405..2b7572c 100644
--- a/kernel/x86.h
+++ b/kernel/x86.h
@@ -3,12 +3,13 @@
 
 #include "kernel.h"
 
-#define X86_IRQ_BEGIN asm("cli\npusha");
-#define X86_IRQ_END   asm("mov $0x20, %al\nout %al, $0x20\npopa\nsti\nleave\niret");
 
-//#define X86_IRQ_BEGIN asm("pusha");
-//#define X86_IRQ_END   asm("mov $0x20, %al\nout %al, $0x20\npopa\nleave\niret");
-//
+// todo: cli/sti??
+// http://wiki.osdev.org/Interrupt_Service_Routines
+// Black Magic: Strongly Discouraged!
+#define X86_IRQ_BEGIN asm("\npusha");
+#define X86_IRQ_END   asm("mov $0x20, %al\nout %al, $0x20\npopa\nleave\niret");
+
 void x86_outb(int port, uint8_t data);
 uint8_t x86_inb(int port);
 void x86_outw(int port, uint16_t data);
-- 
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