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283
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1 module kernel;
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292
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2
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283
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3 import memory;
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4 import process;
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292
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5 import arch;
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355
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6 import io;
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402
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7 import debug;
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283
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8
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381
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9
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283
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10 // Main entry point of the kernel:
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293
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11 function void start()
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283
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12 {
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381
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13 io.println("Welcome to lcfos!");
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353
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14 arch.init();
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407
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15 memory.init();
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393
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16 process.init();
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407
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17 load_init_process();
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408
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18 io.println("Kernel loading finished, now switching to next process");
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19 process.execute_next();
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283
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20 }
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21
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367
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22 // Called in total stress:
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293
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23 function void panic()
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283
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24 {
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407
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25 io.println("Kernel panic!");
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308
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26 arch.halt();
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283
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27 }
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28
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408
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29 type struct {
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30 int magic;
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31 int num_images;
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32 } ramdisk_header_t;
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33
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34 // Load init process (first image) from ram image:
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407
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35 function void load_init_process()
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36 {
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408
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37 // Load image:
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38 var byte* image_addr;
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39 image_addr = arch.get_image_address();
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40 io.print2("ramdisk address: ", cast<int>(image_addr));
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407
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41
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408
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42 var ramdisk_header_t* ramdisk_header;
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43 ramdisk_header = image_addr;
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44 var byte* image_ptr;
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45 image_ptr = image_addr;
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46 if (0x1337 == ramdisk_header->magic)
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47 {
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48 image_ptr += 8;
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49 io.print2("Number of images: ", ramdisk_header->num_images);
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50 if (ramdisk_header->num_images > 0)
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51 {
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52 io.println("Loading init");
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53 var int init_size;
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54 init_size = *(cast<int*>(image_ptr));
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55 io.print2("Init size:", init_size);
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56 image_ptr += 4;
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57
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58 // Allocate physical memory:
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59 var byte* prog_mem;
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60 prog_mem = memory.alloc(init_size);
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61 io.print2("Image_ptr:", cast<int>(image_ptr));
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62 memory.memcpy(prog_mem, image_ptr, init_size);
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63
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64 var process.process_t* init_proc;
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65 init_proc = process.create();
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66 // process.enqueue(init_proc);
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67 }
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68 }
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407
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69 }
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70
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