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1 /*****************************************************************
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2 * main.c
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3 * by Zhiyi Huang, hzy@cs.otago.ac.nz
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4 * University of Otago
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5 *
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6 ********************************************************************/
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7
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8
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9 #include "types.h"
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10 #include "defs.h"
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11 #include "param.h"
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12 #include "memlayout.h"
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13 #include "mmu.h"
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14 #include "proc.h"
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15 #include "arm.h"
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16 #include "mailbox.h"
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17
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18 extern char end[]; // first address after kernel loaded from ELF file
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19 extern pde_t *kpgdir;
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20 extern volatile uint *mailbuffer;
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21 extern unsigned int pm_size;
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22
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23 void OkLoop()
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24 {
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25 setgpiofunc(18, 1); // gpio 18 for Ok Led, set as an output
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26 while(1){
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27 setgpioval(18, 0);
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28 delay(2000000);
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29 setgpioval(18, 1);
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30 delay(2000000);
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31 }
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32 }
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33
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34 void NotOkLoop()
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35 {
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36 setgpiofunc(18, 1); // gpio 18 for Ok Led, set as an output
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37 while(1){
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38 setgpioval(18, 0);
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39 delay(500000);
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40 setgpioval(18, 1);
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41 delay(500000);
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42 }
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43 }
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44
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45 unsigned int getpmsize()
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46 {
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47 create_request(mailbuffer, MPI_TAG_GET_ARM_MEMORY, 8, 0, 0);
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48 writemailbox((uint *)mailbuffer, 8);
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49 readmailbox(8);
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50 if(mailbuffer[1] != 0x80000000) cprintf("Error readmailbox: %x\n", MPI_TAG_GET_ARM_MEMORY);
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51 return mailbuffer[MB_HEADER_LENGTH + TAG_HEADER_LENGTH+1];
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52 }
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53
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54 void machinit(void)
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55 {
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56 memset(cpus, 0, sizeof(struct cpu)*NCPU);
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57 }
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58
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59
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60 void enableirqminiuart(void);
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61
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62 uint mb_data[10];
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63
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64 int cmain()
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65 {
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66 mmuinit0();
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67 machinit();
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68
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69 #if defined (RPI1) || defined (RPI2)
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70 uartinit();
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71 #elif defined (FVP)
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72 uartinit_fvp();
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73 #endif
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74
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75 dsb_barrier();
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76
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77 consoleinit();
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78 cprintf("\nHello World from xv6\n");
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79
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80 kinit1(end, P2V((8*1024*1024)+PHYSTART));
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81 // collect some free space (8 MB) for imminent use
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82 // the physical space below 0x8000 is reserved for PGDIR and kernel stack
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83 kpgdir=p2v(K_PDX_BASE);
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84
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85 mailboxinit();
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86
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87 pm_size = getpmsize();
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88 cprintf("ARM memory is %x\n", pm_size);
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89
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90 mmuinit1();
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91 gpuinit();
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92 pinit();
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93 tvinit();
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94 cprintf("it is ok after tvinit\n");
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95 binit();
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96 cprintf("it is ok after binit\n");
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97 fileinit();
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98 cprintf("it is ok after fileinit\n");
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99 iinit();
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100 cprintf("it is ok after iinit\n");
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101 ideinit();
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102 cprintf("it is ok after ideinit\n");
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103 kinit2(P2V((8*1024*1024)+PHYSTART), P2V(pm_size));
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104 cprintf("it is ok after kinit2\n");
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105 userinit();
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106 cprintf("it is ok after userinit\n");
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107 timer3init();
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108 cprintf("it is ok after timer3init\n");
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109 scheduler();
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110 NotOkLoop();
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111 return 0;
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112 }
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