FreeCalypso > hg > freecalypso-sw
annotate target-utils/libtiffs/init.c @ 471:c8b5a8e84ef7
os_tim_ir.c: os_CreateTimer(): minor fixes
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Thu, 26 Jun 2014 07:13:41 +0000 |
parents | 2900fe603f8a |
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rev | line source |
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100
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1 #include "types.h" |
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2 #include "struct.h" |
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3 #include "globals.h" |
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4 #include "macros.h" |
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5 |
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6 static const u8 ffs_sector_signature[6] = {'F', 'f', 's', '#', 0x10, 0x02}; |
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7 static const u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
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8 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
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9 0xFF, 0xFF, 0xFF, 0xFF}; |
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10 |
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11 static |
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12 find_indexblk() |
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13 { |
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14 u32 sector_addr; |
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15 u8 *sector_ptr; |
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16 int i; |
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17 |
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18 printf("Looking for MPFFS active index block\n"); |
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19 sector_addr = mpffs_base_addr; |
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20 for (i = 0; i < mpffs_nsectors; i++) { |
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21 sector_ptr = (u8 *) sector_addr; |
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22 if (!bcmp(sector_ptr, ffs_sector_signature, 6) && |
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23 sector_ptr[8] == 0xAB) { |
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24 printf("Found at %08X\n", sector_addr); |
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25 mpffs_active_index = (struct inode *) sector_ptr; |
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26 return(0); |
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27 } |
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28 sector_addr += mpffs_sector_size; |
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29 } |
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30 printf("Error: Not found in any of the %d candidate sectors\n", |
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31 mpffs_nsectors); |
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32 return(-1); |
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33 } |
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34 |
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35 static |
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36 find_rootino() |
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37 { |
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38 int ino; |
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39 struct inode *irec; |
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40 |
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41 printf("Looking for the root inode\n"); |
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42 for (ino = 1; ; ino++) { |
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43 if (ino >= mpffs_sector_size >> 4) { |
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44 printf("Error: Hit end of sector, no root inode found\n"); |
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45 return(-1); |
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46 } |
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47 irec = mpffs_active_index + ino; |
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48 if (!bcmp((u8 *) irec, blank_flash_line, 16)) { |
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49 printf("Error: Hit blank flash, no root inode found\n"); |
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50 return(-1); |
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51 } |
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52 if (irec->type == OBJTYPE_DIR && *inode_to_dataptr(irec) == '/') |
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53 break; |
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54 } |
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55 printf("Found at inode #%x\n", ino); |
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56 mpffs_root_ino = ino; |
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57 return(0); |
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58 } |
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59 |
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60 mpffs_init() |
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61 { |
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62 int stat; |
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63 |
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64 if (mpffs_init_done) |
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65 return(0); |
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66 stat = find_indexblk(); |
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67 if (stat < 0) |
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68 return(stat); |
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69 stat = find_rootino(); |
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70 if (stat < 0) |
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71 return(stat); |
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72 mpffs_init_done = 1; |
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73 return(0); |
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74 } |