Mercurial > lcfOS
view cos/kernel/kernel.c @ 22:69bc6d477b38
Added python run function
author | windel |
---|---|
date | Wed, 30 Nov 2011 22:41:51 +0100 |
parents | b1fed2171e1a |
children | 5dd47d6eebac |
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#include "kernel.h" static int shiftstate = 0; static volatile uint8_t charAvail = 0; static volatile char kbdchar = ' '; static char keymap[128] = { '?','?','1','2', '3', '4', '5','6', '7', '8','9', '0', '-','=', 0xe, '?', 'q','w','e','r', 't', 'y', 'u','i', 'o', 'p','[', ']', '\n','?', 'a', 's', 'd','f','g','h', 'j', 'k', 'l',';', '\'', '?','?', '?', 'z','x', 'c', 'v', 'b','n','m',',', '.', '/', '?','?', '?', ' ','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?' }; static char keymapUPPER[128] = { '?','?','!','@', '#', '$', '%','^', '&', '*','(', ')', '_','+', '?', '?', 'Q','W','E','R', 'T', 'Y', 'U','I', 'O', 'P','{', '}', '|','?', 'A', 'S', 'D','F','G','H', 'J', 'K', 'L',':', '"', '?','?', '?', 'Z','X', 'C', 'V', 'B','N','M','<', '>', '?', '?','?', '?', ' ','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?' }; // IO port helpers: void outb(uint16_t port, uint8_t value) { asm volatile ("outb %1, %0" : : "dN" (port), "a" (value)); } uint8_t inb(uint16_t port) { uint8_t ret; asm volatile ("inb %1, %0" : "=a" (ret) : "dN" (port)); return ret; } uint16_t inw(uint16_t port) { uint16_t ret; asm volatile ("inw %1, %0" : "=a" (ret) : "dN" (port)); return ret; } static uint64_t ticks = 0; void timerDriverUpdate() { ticks++; } uint64_t getTimeMS() { return 55*ticks; } int strncmp(const char* s1, const char* s2, int size) { int i; for (i=0; i<size; i++) { if (s1[i] != s2[i]) return 0; } return 1; } void keyboardDriverUpdate(unsigned char scancode) { switch(scancode) { case 0x2a: shiftstate = 1; break; case 0xaa: shiftstate = 0; break; default: if (scancode < 128) { if (charAvail == 0) { if (shiftstate == 0) { kbdchar = keymap[scancode]; } else { kbdchar = keymapUPPER[scancode]; } charAvail = 1; } } else { // Key release //printf("Unhandled scancode: 0x%x\n", scancode); } break; } } char getChar() { while (charAvail == 0); char c = kbdchar; charAvail = 0; return c; } void getline(char *buffer, int len) { char c; int i = 0; while (i < len-1) { c = getChar(); if (c == '\n') { // Enter break; } if (c == 0x0e) { if (i>0) { printf(" "); i--; } continue; } buffer[i] = c; printf("%c", c); i++; } buffer[i] = 0; } /* malloc and free divide the chunks of memory present at the heap of the kernel into smaller parts. The heap is located at: 0x */ static void* kernel_heap = (void*) 0x400000; // 4 MB - 6 MB is heap /* Allocates 'size' bytes and returns the pointer if succesfull. Kernelpanic in case of failure.. */ void* kmalloc(uint64_t size) { printf("Malloc %d bytes\n", size); return kernel_heap; } void kfree(void* ptr) { printf("Free address %x\n", ptr); } void startPython() { // TODO: connect to Py_Main PyRun_SimpleString("print('hello world')"); } void testMalloc() { char *a, *b; a = kmalloc(100); printf("Got a at %x\n", a); a[0] = 'A'; b = kmalloc(22); printf("Got b at %x\n", b); b[0] = 'B'; kfree(a); } void kmain() { init_screen(); setupIDT(); printf("Welcome! .. "); printf("Testing malloc"); testMalloc(); printf("Entering mainloop!\n"); while (1==1) { char buffer[70]; printf(">>>"); getline(buffer, 70); // TODO: interpret this line with python :) printf("\n"); printf("Got line: '%s'\n", buffer); if (buffer[0] == 'x') { printf("System time in ms: %d\n", getTimeMS()); } if ( strncmp(buffer, "help", 4)) { printf("Help\n Try one of these commands:\n"); printf(" x: print system time in ms\n"); } } }