Setup cmake project

2022-12-07 16:40:43 +01:00
parent db2816a092
commit f304e7f239
138 changed files with 28939 additions and 0 deletions
--- a/src/device/graphics/VESA.cc
+++ b/src/device/graphics/VESA.cc
@ -0,0 +1,131 @@
+/*****************************************************************************
+ *                                                                           *
+ *                                 V E S A                                   *
+ *                                                                           *
+ *---------------------------------------------------------------------------*
+ * Beschreibung:    VESA-Treiber ueber 16-Bit BIOS.                          *
+ *                                                                           *
+ * Autor:           Michael Schoettner, HHU, 18.3.2017                       *
+ *****************************************************************************/
+
+#include "VESA.h"
+#include "device/bios/BIOS.h"
+
+// Informationen ueber einen VESA-Grafikmodus
+// (siehe http://wiki.osdev.org/VESA_Video_Modes)
+struct VbeModeInfoBlock {
+    unsigned short attributes;
+    unsigned char winA, winB;
+    unsigned short granularity;
+    unsigned short winsize;
+    unsigned short segmentA, segmentB;
+    unsigned short realFctPtr[2];
+    unsigned short pitch;  // Bytes pro Scanline
+
+    unsigned short Xres, Yres;
+    unsigned char Wchar, Ychar, planes, bpp, banks;
+    unsigned char memory_model, bank_size, image_pages;
+    unsigned char reserved0;
+
+    unsigned char red_mask, red_position;
+    unsigned char green_mask, green_position;
+    unsigned char blue_mask, blue_position;
+    unsigned char rsv_mask, rsv_position;
+    unsigned char directcolor_attributes;
+
+    unsigned int physbase;  // Adresse des Linear-Framebuffers
+    unsigned int OffScreenMemOffset;
+    unsigned short OffScreenMemSize;
+} __attribute__((packed));
+
+// Informationen ueber die Grafikkarte
+// (siehe http://wiki.osdev.org/VESA_Video_Modes)
+struct VbeInfoBlock {
+    char VbeSignature[4];            // == "VESA"
+    unsigned short VbeVersion;       // == 0x0300 for VBE 3.0
+    unsigned short OemStringPtr[2];  // isa vbeFarPtr
+    unsigned char Capabilities[4];
+    unsigned short VideoModePtr[2];  // isa vbeFarPtr
+    unsigned short TotalMemory;      // as # of 64KB blocks
+} __attribute__((packed));
+
+/*****************************************************************************
+ * Methode:         VESA::initTextMode                                       *
+ *---------------------------------------------------------------------------*
+ * Beschreibung:    Schalter in den Text-Modus 80x25 Zeichen.                *
+ *****************************************************************************/
+void VESA::initTextMode() {
+    BC_params->AX = 0x4f02;      // SVFA BIOS, init mode
+    BC_params->BX = 0x4003;      // 80x25
+    BIOS::Int(0x10);
+}
+
+/*****************************************************************************
+ * Methode:         VESA::initGraphicMode                                    *
+ *---------------------------------------------------------------------------*
+ * Parameter:       Nummer des Grafikmodus (siehe VESA.h)                    *
+ *                                                                           *
+ * Beschreibung:    Bestimmten Grafikmodus einschalten. Dies wird durch      *
+ *                  einen Aufruf des BIOS gemacht.                           *
+ *****************************************************************************/
+bool VESA::initGraphicMode(unsigned short mode) {
+
+    // Alle Grafikmodi abfragen
+    BC_params->AX = 0x4F00;
+    BC_params->ES = RETURN_MEM >> 4;
+    BC_params->DI = RETURN_MEM & 0xF;
+    BIOS::Int(0x10);
+
+    VbeInfoBlock* ib = reinterpret_cast<VbeInfoBlock*>(RETURN_MEM);
+
+    // Signaturen pruefen
+    if (BC_params->AX != 0x004F) {
+        log.error() << "VESA wird nicht unterstuetzt." << endl;
+        return false;
+    }
+    if (ib->VbeSignature[0] != 'V' || ib->VbeSignature[1] != 'E' ||
+        ib->VbeSignature[2] != 'S' || ib->VbeSignature[3] != 'A') {
+        log.error() << "VESA wird nicht unterstuetzt." << endl;
+        return false;
+    }
+
+    //    kout << "TotalVideoMemory:  " << ((ib->TotalMemory*65536) / (1024*1024)) << " MB" << endl;
+
+    // Gewuenschten Grafikmodus aus Antwort suchen
+    unsigned short* modePtr = reinterpret_cast<unsigned short*>((ib->VideoModePtr[1] << 4) + ib->VideoModePtr[0]);
+    for (int i = 0; modePtr[i] != 0xFFFF; ++i) {
+        // Gewuenschter Grafikmodus gefunden?
+        if (modePtr[i] == mode) {
+            VbeModeInfoBlock* minf = reinterpret_cast<VbeModeInfoBlock*>(RETURN_MEM);
+
+            // Weitere Infos ueber diesen Grafikmodus abfragen
+            BC_params->AX = 0x4F01;
+            BC_params->CX = mode;
+            BC_params->ES = RETURN_MEM >> 4;
+            BC_params->DI = RETURN_MEM & 0xF;
+            BIOS::Int(0x10);
+
+            // Text-Modi 0-3 haben keinen LFB
+            if (mode > 3 && (minf->attributes & 0x90) == 0) {
+                log.error() << "Grafikmodus bietet keinen linearen Framebuffer." << endl;
+                return false;
+            }
+
+            mode_nr = mode;
+            xres = minf->Xres;
+            yres = minf->Yres;
+            bpp = static_cast<int>(minf->bpp);
+            lfb = minf->physbase;
+
+            hfb = reinterpret_cast<unsigned int>(new char[xres * yres * bpp / 8]);
+
+            // Grafikmodus einschalten
+            BC_params->AX = 0x4f02;  // SVFA BIOS, init mode
+            BC_params->BX = mode;
+            BIOS::Int(0x10);
+            return true;
+        }
+    }
+    log.error() << "Grafikmodus nicht gefunden." << endl;
+    return false;
+}