| 1 | /*␊ |
| 2 | * DRAM Controller Module␊ |
| 3 | * Scans the dram controller and notifies OS X of the memory modules.␊ |
| 4 | *␉This was converted from boot2 code to a boot2 module.␊ |
| 5 | *␊ |
| 6 | */␊ |
| 7 | ␊ |
| 8 | #include "libsaio.h"␊ |
| 9 | #include "pci.h"␊ |
| 10 | #include "platform.h"␊ |
| 11 | #include "dram_controllers.h"␊ |
| 12 | #include "spd.h"␊ |
| 13 | #include "mem.h"␊ |
| 14 | #include "modules.h"␊ |
| 15 | ␊ |
| 16 | pci_dt_t *dram_controller_dev;␊ |
| 17 | ␊ |
| 18 | ␊ |
| 19 | void Memory_hook(void* arg1, void* arg2, void* arg3, void* arg4);␊ |
| 20 | void Memory_PCIDevice_hook(void* arg1, void* arg2, void* arg3, void* arg4);␊ |
| 21 | ␊ |
| 22 | ␊ |
| 23 | void Memory_start()␊ |
| 24 | {␊ |
| 25 | ␉register_hook_callback("PCIDevice", &Memory_PCIDevice_hook);␊ |
| 26 | ␉register_hook_callback("ScanMemory", &Memory_hook);␊ |
| 27 | ␉␊ |
| 28 | }␊ |
| 29 | ␊ |
| 30 | void Memory_PCIDevice_hook(void* arg1, void* arg2, void* arg3, void* arg4)␊ |
| 31 | {␊ |
| 32 | ␉pci_dt_t* current = arg1;␊ |
| 33 | ␉if(current->class_id == PCI_CLASS_BRIDGE_HOST)␊ |
| 34 | ␉{␊ |
| 35 | ␉␉dram_controller_dev = current;␊ |
| 36 | ␉}␊ |
| 37 | }␊ |
| 38 | ␊ |
| 39 | void Memory_hook(void* arg1, void* arg2, void* arg3, void* arg4)␊ |
| 40 | {␊ |
| 41 | ␉if (dram_controller_dev!=NULL) {␊ |
| 42 | ␉␉scan_dram_controller(dram_controller_dev); // Rek: pci dev ram controller direct and fully informative scan ...␊ |
| 43 | ␉}␊ |
| 44 | ␉scan_memory(&Platform); // unfortunately still necesary for some comp where spd cant read correct speed␊ |
| 45 | ␉scan_spd(&Platform);␊ |
| 46 | }␊ |
| 47 | ␊ |
| 48 | ␊ |
| 49 | ␊ |
| 50 | /* Nedded to devide 64bit numbers correctly. TODO: look into why the module needs this␊ |
| 51 | * And why it isn't needed when compiled into boot2␊ |
| 52 | */␊ |
| 53 | ␊ |
| 54 | uint64_t __udivdi3(uint64_t numerator, uint64_t denominator)␊ |
| 55 | {␊ |
| 56 | ␉uint64_t quotient = 0, qbit = 1;␊ |
| 57 | ␉␊ |
| 58 | ␉if (denominator)␊ |
| 59 | ␉{␊ |
| 60 | ␉␉while ((int64_t) denominator >= 0)␊ |
| 61 | ␉␉{␊ |
| 62 | ␉␉␉denominator <<= 1;␊ |
| 63 | ␉␉␉qbit <<= 1;␊ |
| 64 | ␉␉}␊ |
| 65 | ␉␉␊ |
| 66 | ␉␉while (denominator)␊ |
| 67 | ␉␉{␊ |
| 68 | ␉␉␉if (denominator <= numerator)␊ |
| 69 | ␉␉␉{␊ |
| 70 | ␉␉␉␉numerator -= denominator;␊ |
| 71 | ␉␉␉␉quotient += qbit;␊ |
| 72 | ␉␉␉}␊ |
| 73 | ␉␉␉denominator >>= 1;␊ |
| 74 | ␉␉␉qbit >>= 1;␊ |
| 75 | ␉␉}␊ |
| 76 | ␉␉␊ |
| 77 | ␉␉return quotient;␊ |
| 78 | ␉}␊ |
| 79 | ␉else {␊ |
| 80 | ␉␉stop("Divide by 0");␊ |
| 81 | ␉␉return 0;␊ |
| 82 | ␉}␊ |
| 83 | ␉␊ |
| 84 | }␊ |
| 85 | |
