Add support for VESA console

kernel/include/console.hpp

@@ -12,6 +12,8 @@
 #include "stl/enable_if.hpp"
 #include "stl/string.hpp"
 
+void init_console();
+
 void set_column(long column);
 long get_column();
 

kernel/include/text_console.hpp

@@ -0,0 +1,22 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#ifndef TEXT_CONSOLE_H
+#define TEXT_CONSOLE_H
+
+#include "stl/types.hpp"
+
+struct text_console {
+    void init();
+    size_t lines();
+    size_t columns();
+    void clear();
+    void scroll_up();
+    void print_char(size_t line, size_t column, char c);
+};
+
+#endif

kernel/include/vesa_console.hpp

@@ -0,0 +1,23 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#ifndef VESA_CONSOLE_H
+#define VESA_CONSOLE_H
+
+#include "stl/types.hpp"
+
+struct vesa_console {
+    void init();
+    size_t lines();
+    size_t columns();
+    void clear();
+    void scroll_up();
+    void print_char(size_t line, size_t column, char c);
+};
+
+#endif
+

kernel/src/console.cpp

@@ -7,45 +7,64 @@
 
 #include <stdarg.h>
 
-#include "console.hpp"
-
 #include "stl/types.hpp"
 #include "stl/string.hpp"
 
+#include "console.hpp"
+#include "vesa.hpp"
+
+#include "text_console.hpp"
+#include "vesa_console.hpp"
+
 namespace {
 
+text_console t_console;
+vesa_console v_console;
+bool text = true;
+
+size_t lines(){
+    if(text){
+        return t_console.lines();
+    } else {
+        return v_console.lines();
+    }
+}
+
+size_t columns(){
+    if(text){
+        return t_console.columns();
+    } else {
+        return v_console.columns();
+    }
+}
+
+void clear(){
+    if(text){
+        t_console.clear();
+    } else {
+        v_console.clear();
+    }
+}
+
+void scroll_up(){
+    if(text){
+        t_console.scroll_up();
+    } else {
+        v_console.scroll_up();
+    }
+}
+
+void print_char(size_t line, size_t column, char c){
+    if(text){
+        t_console.print_char(line, column, c);
+    } else {
+        v_console.print_char(line, column, c);
+    }
+}
+
 long current_line = 0;
 long current_column = 0;
 
-enum vga_color {
-    BLACK = 0,
-    BLUE = 1,
-    GREEN = 2,
-    CYAN = 3,
-    RED = 4,
-    MAGENTA = 5,
-    BROWN = 6,
-    LIGHT_GREY = 7,
-    DARK_GREY = 8,
-    LIGHT_BLUE = 9,
-    LIGHT_GREEN = 10,
-    LIGHT_CYAN = 11,
-    LIGHT_RED = 12,
-    LIGHT_MAGENTA = 13,
-    LIGHT_BROWN = 14,
-    WHITE = 15,
-};
-
-uint8_t make_color(vga_color fg, vga_color bg){
-    return fg | bg << 4;
-}
-
-uint16_t make_vga_entry(char c, uint8_t color){
-    uint16_t c16 = c;
-    uint16_t color16 = color;
-    return c16 | color16 << 8;
-}
-
 template<typename N>
 uint64_t digits(N number){
     if(number < 10){
@@ -96,6 +115,16 @@ void print_signed(D number){
 
 } //end of anonymous namespace
 
+void init_console(){
+    text = !vesa::vesa_enabled;
+
+    if(text){
+        t_console.init();
+    } else {
+        v_console.init();
+    }
+}
+
 void set_column(long column){
     current_column = column;
 }
@@ -147,19 +176,10 @@ void k_print(int64_t number){
 void next_line(){
     ++current_line;
 
-    if(current_line == 25){
-        auto vga_buffer_fast = reinterpret_cast<uint64_t*>(0x0B8000);
-        auto destination = vga_buffer_fast;
-        auto source = &vga_buffer_fast[20];
+    if(current_line == lines()){
+        scroll_up();
 
-        std::copy_n(destination, source, 24 * 20);
-
-        auto vga_buffer = reinterpret_cast<uint16_t*>(0x0B8000);
-        for(uint64_t i = 0; i < 80; ++i){
-            vga_buffer[24 * 80 + i] = make_vga_entry(' ', make_color(WHITE, BLACK));
-        }
-
-        current_line = 24;
+        --current_line;
     }
 
     current_column = 0;
@@ -175,13 +195,11 @@ void k_print(char key){
     } else if(key == '\t'){
         k_print("  ");
     } else {
-        uint16_t* vga_buffer = reinterpret_cast<uint16_t*>(0x0B8000);
-
-        vga_buffer[current_line * 80 + current_column] = make_vga_entry(key, make_color(WHITE, BLACK));
+        print_char(current_line, current_column, key);
 
         ++current_column;
 
-        if(current_column == 80){
+        if(current_column == columns()){
             next_line();
         }
     }
@@ -206,14 +224,7 @@ void k_print(const char* str, uint64_t end){
 }
 
 void wipeout(){
-    current_line = 0;
-    current_column = 0;
-
-    for(int line = 0; line < 25; ++line){
-        for(uint64_t column = 0; column < 80; ++column){
-            k_print(' ');
-        }
-    }
+    clear();
 
     current_line = 0;
     current_column = 0;

kernel/src/kernel.cpp

@@ -16,6 +16,7 @@
 #include "arch.hpp"
 #include "e820.hpp"
 #include "vesa.hpp"
+#include "console.hpp"
 
 extern "C" {
 
@@ -40,21 +41,10 @@ void  kernel_main(){
     disks::detect_disks();
     vesa::init();
 
-    //Call global cosntructors
+    //Call global constructors
     _init();
 
-    vesa::draw_hline(10, 10, 1004, 0, 255, 0);
-    vesa::draw_hline(10, 40, 1004, 0, 255, 0);
-    vesa::draw_hline(10, 758, 1004, 0, 255, 0);
-
-    vesa::draw_vline(10, 10, 748, 0, 255, 0);
-    vesa::draw_vline(1014, 10, 748, 0, 255, 0);
-
-    vesa::draw_char(500, 500, 'h', 0, 255, 0);
-    vesa::draw_char(508, 500, 'e', 0, 255, 0);
-    vesa::draw_char(516, 500, 'l', 0, 255, 0);
-    vesa::draw_char(524, 500, 'l', 0, 255, 0);
-    vesa::draw_char(532, 500, 'o', 0, 255, 0);
+    init_console();
 
     //Launch the shell
     init_shell();

kernel/src/shell.cpp

@@ -876,7 +876,7 @@ void shutdown_command(const std::vector<std::string>&){
 } //end of anonymous namespace
 
 void init_shell(){
-//    wipeout();
+    wipeout();
 
     k_print("thor> ");
 

kernel/src/text_console.cpp

@@ -0,0 +1,81 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#include "text_console.hpp"
+#include "stl/algorithms.hpp"
+
+namespace {
+
+enum vga_color {
+    BLACK = 0,
+    BLUE = 1,
+    GREEN = 2,
+    CYAN = 3,
+    RED = 4,
+    MAGENTA = 5,
+    BROWN = 6,
+    LIGHT_GREY = 7,
+    DARK_GREY = 8,
+    LIGHT_BLUE = 9,
+    LIGHT_GREEN = 10,
+    LIGHT_CYAN = 11,
+    LIGHT_RED = 12,
+    LIGHT_MAGENTA = 13,
+    LIGHT_BROWN = 14,
+    WHITE = 15,
+};
+
+uint8_t make_color(vga_color fg, vga_color bg){
+    return fg | bg << 4;
+}
+
+uint16_t make_vga_entry(char c, uint8_t color){
+    uint16_t c16 = c;
+    uint16_t color16 = color;
+    return c16 | color16 << 8;
+}
+
+} //end of anonymous namespace
+
+void text_console::init(){
+    //Nothing special to init
+}
+
+size_t text_console::lines(){
+    return 25;
+}
+
+size_t text_console::columns(){
+    return 80;
+}
+
+void text_console::clear(){
+    for(int line = 0; line < 25; ++line){
+        for(uint64_t column = 0; column < 80; ++column){
+            print_char(line, column, ' ');
+        }
+    }
+}
+
+void text_console::scroll_up(){
+    auto vga_buffer_fast = reinterpret_cast<uint64_t*>(0x0B8000);
+    auto destination = vga_buffer_fast;
+    auto source = &vga_buffer_fast[20];
+
+    std::copy_n(destination, source, 24 * 20);
+
+    auto vga_buffer = reinterpret_cast<uint16_t*>(0x0B8000);
+    for(uint64_t i = 0; i < 80; ++i){
+        vga_buffer[24 * 80 + i] = make_vga_entry(' ', make_color(WHITE, BLACK));
+    }
+}
+
+void text_console::print_char(size_t line, size_t column, char c){
+    uint16_t* vga_buffer = reinterpret_cast<uint16_t*>(0x0B8000);
+
+    vga_buffer[line * 80 + column] = make_vga_entry(c, make_color(WHITE, BLACK));
+}

kernel/src/vesa.cpp

@@ -120,6 +120,8 @@ void vesa::draw_char(size_t x, size_t y, char c, uint32_t color){
         for(size_t j = 0; j < 8; ++j){
             if(font_char[i] & (1 << (8 - j))){
                 screen[where+j] = color;
+            } else {
+                screen[where+j] = 0;
             }
         }
 

kernel/src/vesa_console.cpp

@@ -0,0 +1,57 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#include "vesa_console.hpp"
+#include "vesa.hpp"
+
+namespace {
+
+constexpr const size_t MARGIN = 10;
+constexpr const size_t PADDING = 5;
+constexpr const size_t LEFT = MARGIN + PADDING;
+constexpr const size_t TOP = 50;
+
+size_t _lines;
+size_t _columns;
+uint32_t _color;
+
+} //end of anonymous namespace
+
+void vesa_console::init(){
+    auto& block = vesa::mode_info_block;
+
+    _columns = (block.width - (MARGIN + PADDING) * 2) / 8;
+    _lines = (block.height - TOP - MARGIN - PADDING) / 16;
+    _color = vesa::make_color(0, 255, 0);
+
+    vesa::draw_hline(10, 10, 1004, _color);
+    vesa::draw_hline(10, 40, 1004, _color);
+    vesa::draw_hline(10, 758, 1004, _color);
+
+    vesa::draw_vline(10, 10, 748, _color);
+    vesa::draw_vline(1014, 10, 748, _color);
+}
+
+size_t vesa_console::lines(){
+    return _lines;
+}
+
+size_t vesa_console::columns(){
+    return _columns;
+}
+
+void vesa_console::clear(){
+
+}
+
+void vesa_console::scroll_up(){
+
+}
+
+void vesa_console::print_char(size_t line, size_t column, char c){
+    vesa::draw_char(LEFT + 8 * column, TOP + 16 * line, c, _color);
+}