Scrolling and Shutdown

include/kernel/pwmgnt.h

@@ -31,11 +31,9 @@
 
 //----------------------------------------------------------------------------//
 
-void PoShutdownQemu(void);
-
-void PoShutdownVirtualbox(void);
-
-void PoShutdownBochs(void);
+noreturn void PoShutdownQemu(void);
+noreturn void PoShutdownVirtualbox(void);
+noreturn void PoShutdownBochs(void);
 
 //----------------------------------------------------------------------------//
 

kaleid/kernel/init/init.c

@@ -38,6 +38,8 @@ extern void BtInitBootInfo(multiboot_info_t *mbi, void *codeSeg);
 
 // io/vga.c
 extern error_t IoInitVGABuffer(void);
+extern void IoScrollDown(void);
+extern void IoScrollUp(void);
 
 // io/keyb.c
 extern void IoEnableKeyb(void);
@@ -56,6 +58,9 @@ extern void divideByZero(void);
 //
 noreturn void BtStartKern(multiboot_info_t *mbInfo, uint mbMagic, void *codeSeg)
 {
+    uchar ch;
+    error_t rc;
+
     KeDisableIRQs();
 
     // Initialize the BootInfo_t structure
@@ -76,24 +81,38 @@ noreturn void BtStartKern(multiboot_info_t *mbInfo, uint mbMagic, void *codeSeg)
 
     // Several inits
     MmInitHeap();
-    //PsInitSched();
+    PsInitSched();
 
     // Interrupts launching
     IdtSetup();
     KeEnableIRQs();
-    // Drivers enabling
+
+    // Start drivers
     IoEnableRtc();
     IoEnableKeyb();
 
     IoGetRtcTimeChar();
     IoPrintRtcTime();
-    IoDoStarWars();
 
-    KernLog("Goodbye at %s\n", IoGetRtcTimeChar());
+    int i=0;
+    while(i++<50)KernLog("%d\n", i);
 
-    //PoShutdownQemu();
-
-    // End this machine's suffering
+    // Main loop
+    while ((rc = bgetc(BStdIn, &ch)) == EOK) {
+        switch (ch) {
+        case 17: // DC1
+            IoScrollUp();
+            break;
+        case 18: // DC2
+            IoScrollDown();
+            break;
+        case 27: // ESC
             BFlushBuf(BStdOut);
-    KeCrashSystem();
+            PoShutdownQemu();
+            break;
+        }
+    }
+
+    KernLog("End of input reached\n");
+    PoShutdownQemu();
 }

kaleid/kernel/io/keyb.c

@@ -30,8 +30,8 @@ char ScanCodes[100] = { 0 };
 
 void KeybPrint(char code)
 {
-    if (code) {
     bputc(BStdIn, ScanCodes[(int)code]);
+    if (code && (isprint(ScanCodes[(int)code]) || ScanCodes[(int)code]=='\n')) {
         bputc(BStdOut, ScanCodes[(int)code]);
         //bprintf(BStdOut, "%x ", code);
         BStdOut->flusher(BStdOut);
@@ -40,6 +40,7 @@ void KeybPrint(char code)
 
 void ScanCodesInit(void)
 {
+    ScanCodes[0x01] = 27; // ESC
     ScanCodes[0x02] = '1';
     ScanCodes[0x03] = '2';
     ScanCodes[0x04] = '3';
@@ -94,6 +95,12 @@ void ScanCodesInit(void)
 
     ScanCodes[0x1C] = '\n';
     ScanCodes[0x39] = ' ';
+    
+    // Numpad
+    ScanCodes[0x48] = 17; // DC1, will serve as Arrow Up
+    ScanCodes[0x50] = 18; // DC2, will serve as Arrow Down
+    ScanCodes[0x4B] = 19; // DC3, will serve as Arrow Left
+    ScanCodes[0x4D] = 20; // DC4, will serve as Arrow Right
 }
 
 void KeybHandler(ISRFrame_t *regs)

kaleid/kernel/io/vga.c

@@ -26,11 +26,6 @@
 #include <kernel/boot.h>
 #include <kernel/cursor.h>
 
-//----------------------------------------------------------//
-//           Internal functions for VGA terminals           //
-//           These DO NOT check input correctness           //
-//----------------------------------------------------------//
-
 //
 // VGA-related macros
 //
@@ -38,6 +33,8 @@
 #define VGA_ComputeOffset(term, x, y)   ((y) * (term)->width + (x))
 #define VGA_ComputeEntry(ch, cl)        (((ushort)(ch)) | (ushort)(cl) << 8)
 
+static uint bscroll = 0;
+
 //
 // VGA Buffer Flusher
 //
@@ -49,7 +46,7 @@ error_t bvgaflusher(Buffer_t *buf)
     uchar *currentLine = buf->wp - buf->lineLen - buf->lastLF;
     uchar *bufStart = (uchar *)lmax((size_t)buf->buf,
                             (size_t)currentLine
-                            - (buf->nLines - 2) * buf->lineLen);
+                            - (buf->nLines - 2 + bscroll) * buf->lineLen);
     
     uchar *ptr = bufStart;
 
@@ -80,6 +77,23 @@ error_t bvgaflusher(Buffer_t *buf)
     return EOK;
 }
 
+void IoScrollDown(void)
+{
+    if (bscroll > 0)
+        bscroll--;
+    bvgaflusher(BStdOut);
+}
+
+
+void IoScrollUp(void)
+{
+    // Keep the 8 below the 10 given to BOpenTermBufEx
+    if (bscroll < BtVideoInfo.framebufferHeight * 8)
+        bscroll++;
+    bvgaflusher(BStdOut);
+}
+
+
 //
 // Initialize VGA buffer
 //
@@ -94,7 +108,7 @@ error_t IoInitVGABuffer(void)
               bvgabufsrc, BS_WRONLY,
               BtVideoInfo.framebufferWidth,
               BtVideoInfo.framebufferHeight,
-              1, bvgaflusher);
+              10, bvgaflusher);
 
     BEnableAutoScroll(BStdOut);
 

kaleid/kernel/po/shtdwn.c

@@ -26,29 +26,35 @@
 #include <kernel/iomisc.h>
 #include <kernel/time.h>
 
-void PoShutdownQemu(void)
+noreturn void PoShutdownQemu(void)
 {
     KernLog("Shutdown QEMU at %s...\n", IoGetRtcTimeChar());
 
     IoRtcWait(1000);
 
     IoWriteWordOnPort(0x604, 0x2000);
+    
+    __builtin_unreachable();
 };
 
-void PoShutdownVirtualbox(void)
+noreturn void PoShutdownVirtualbox(void)
 {
     KernLog("Shutdown VirtualBox at %s...\n", IoGetRtcTimeChar());
 
     IoRtcWait(1000);
 
     IoWriteWordOnPort(0x4004, 0x3400);
+    
+    __builtin_unreachable();
 };
 
-void PoShutdownBochs(void)
+noreturn void PoShutdownBochs(void)
 {
     KernLog("Shutdown Bochs at %s...\n", IoGetRtcTimeChar());
 
     IoRtcWait(1000);
 
     IoWriteWordOnPort(0xB004, 0x2000);
+    
+    __builtin_unreachable();
 };

kaleid/libbuf/bgetc.c

@@ -25,12 +25,17 @@
 #include <extras/buf.h>
 #include <extras/locks.h>
 
+#ifdef _KALEID_KERNEL
+#include <kernel/time.h>
+#endif
+
 error_t BGetFromBuf(Buffer_t *buf, uchar *ch)
 {
     error_t rc;
     assert(buf && buf->initDone == INITOK);
 
     if (!buf) return EINVAL;
+    if (buf->flags & BF_TERM) return EBADF;
     if (buf->state != BS_RDWR && buf->state != BS_RDONLY) {
         return EBADF;
     }
@@ -41,12 +46,45 @@ error_t BGetFromBuf(Buffer_t *buf, uchar *ch)
     return rc;
 }
 
+// XXX for now, at most 4096 characters can be inputed in BStdIn
+
 error_t bgetc(Buffer_t *buf, uchar *ch)
 {
     error_t rc = EOK;
 
     if (buf->flags & (BF_EOF|BF_ERR)) return EENDF;
     
+    assert(!(buf->rp > buf->wp)); // Shouldn't be possible right now
+    
+    if (buf->rp == buf->buf + buf->size) {
+        buf->flags |= BF_EOF;
+        return EENDF;
+    }
+
+    // Are there things to read at all?
+    if (buf->rp < buf->wp) {
+        *ch = *buf->rp++;
         return EOK;
     }
     
+    // We need to fill the buffer
+    else {
+        // We need a BFiller_t
+        // For now we wait until something is in there
+        // (so that BStdIn works; don't make anything else)
+        while (buf->rp >= buf->wp) {
+#ifdef _KALEID_KERNEL
+            IoRtcWait(1);
+#endif
+        }
+        
+        *ch = *buf->rp++;
+    }
+    
+    if (rc != EOK) {
+        // buf->flags |= BF_ERR;
+    }
+    
+    return rc;
+}
+