| 1 | /*␊ |
| 2 | * spd.c - serial presence detect memory information␊ |
| 3 | *␊ |
| 4 | * Originally restored from pcefi10.5␊ |
| 5 | * Dynamic mem detection original impl. by Rekursor␊ |
| 6 | * System profiler fix and other fixes by Mozodojo.␊ |
| 7 | */␊ |
| 8 | ␊ |
| 9 | //#include "libsaio.h" - included on the header.␊ |
| 10 | //#include "saio_internal.h" - included on bootstruct.h␊ |
| 11 | #include "bootstruct.h"␊ |
| 12 | #include "pci.h"␊ |
| 13 | #include "platform.h"␊ |
| 14 | #include "spd.h"␊ |
| 15 | #include "memvendors.h"␊ |
| 16 | ␊ |
| 17 | #ifndef DEBUG_SPD␊ |
| 18 | #define DEBUG_SPD 0␊ |
| 19 | #endif␊ |
| 20 | ␊ |
| 21 | #if DEBUG_SPD␊ |
| 22 | #define DBG(x...)␉printf(x)␊ |
| 23 | #else␊ |
| 24 | #define DBG(x...)␊ |
| 25 | #endif␊ |
| 26 | ␊ |
| 27 | static const char *spd_memory_types[] =␊ |
| 28 | {␊ |
| 29 | ␉"RAM", /* 00h Undefined */␊ |
| 30 | ␉"FPM", /* 01h FPM */␊ |
| 31 | ␉"EDO", /* 02h EDO */␊ |
| 32 | ␉"",␉␉␉␉/* 03h PIPELINE NIBBLE */␊ |
| 33 | ␉"SDRAM", /* 04h SDRAM */␊ |
| 34 | ␉"",␉␉␉␉/* 05h MULTIPLEXED ROM */␊ |
| 35 | ␉"DDR SGRAM",␉/* 06h SGRAM DDR */␊ |
| 36 | ␉"DDR SDRAM",␉/* 07h SDRAM DDR */␊ |
| 37 | ␉"DDR2 SDRAM", /* 08h SDRAM DDR 2 */␊ |
| 38 | ␉"",␉␉␉␉/* 09h Undefined */␊ |
| 39 | ␉"",␉␉␉␉/* 0Ah Undefined */␊ |
| 40 | ␉"DDR3 SDRAM" /* 0Bh SDRAM DDR 3 */␊ |
| 41 | };␊ |
| 42 | ␊ |
| 43 | #define UNKNOWN_MEM_TYPE 2␊ |
| 44 | static uint8_t spd_mem_to_smbios[] =␊ |
| 45 | {␊ |
| 46 | ␉UNKNOWN_MEM_TYPE, /* 00h Undefined */␊ |
| 47 | ␉UNKNOWN_MEM_TYPE, /* 01h FPM */␊ |
| 48 | ␉UNKNOWN_MEM_TYPE, /* 02h EDO */␊ |
| 49 | ␉UNKNOWN_MEM_TYPE,␉ /* 03h PIPELINE NIBBLE */␊ |
| 50 | ␉SMB_MEM_TYPE_SDRAM, /* 04h SDRAM */␊ |
| 51 | ␉SMB_MEM_TYPE_ROM,␉ /* 05h MULTIPLEXED ROM */␊ |
| 52 | ␉SMB_MEM_TYPE_SGRAM, /* 06h SGRAM DDR */␊ |
| 53 | ␉SMB_MEM_TYPE_DDR, /* 07h SDRAM DDR */␊ |
| 54 | ␉SMB_MEM_TYPE_DDR2, /* 08h SDRAM DDR 2 */␊ |
| 55 | ␉UNKNOWN_MEM_TYPE, ␉ /* 09h Undefined */␊ |
| 56 | ␉UNKNOWN_MEM_TYPE,␉ /* 0Ah Undefined */␊ |
| 57 | ␉SMB_MEM_TYPE_DDR3 /* 0Bh SDRAM DDR 3 */␊ |
| 58 | };␊ |
| 59 | #define SPD_TO_SMBIOS_SIZE (sizeof(spd_mem_to_smbios)/sizeof(uint8_t))␊ |
| 60 | ␊ |
| 61 | #define rdtsc(low,high) \␊ |
| 62 | __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))␊ |
| 63 | ␊ |
| 64 | #define SMBHSTSTS 0␊ |
| 65 | #define SMBHSTCNT 2␊ |
| 66 | #define SMBHSTCMD 3␊ |
| 67 | #define SMBHSTADD 4␊ |
| 68 | #define SMBHSTDAT 5␊ |
| 69 | #define SBMBLKDAT 7␊ |
| 70 | ␊ |
| 71 | /** Read one byte from the intel i2c, used for reading SPD on intel chipsets only. */␊ |
| 72 | unsigned char smb_read_byte_intel(uint32_t base, uint8_t adr, uint8_t cmd)␊ |
| 73 | {␊ |
| 74 | int l1, h1, l2, h2;␊ |
| 75 | unsigned long long t;␊ |
| 76 | ␉␊ |
| 77 | outb(base + SMBHSTSTS, 0x1f);␉␉␉␉␉// reset SMBus Controller␊ |
| 78 | outb(base + SMBHSTDAT, 0xff);␊ |
| 79 | ␉␊ |
| 80 | while( inb(base + SMBHSTSTS) & 0x01);␉␉␉// wait until ready␊ |
| 81 | ␉␊ |
| 82 | outb(base + SMBHSTCMD, cmd);␊ |
| 83 | outb(base + SMBHSTADD, (adr << 1) | 0x01 );␊ |
| 84 | outb(base + SMBHSTCNT, 0x48 );␊ |
| 85 | ␉␊ |
| 86 | rdtsc(l1, h1);␊ |
| 87 | ␉␊ |
| 88 | ␉while (!( inb(base + SMBHSTSTS) & 0x02))␉␉// wait til command finished␊ |
| 89 | ␉{␉␊ |
| 90 | ␉␉rdtsc(l2, h2);␊ |
| 91 | ␉␉t = ((h2 - h1) * 0xffffffff + (l2 - l1)) / (Platform.CPU.TSCFrequency / 100);␊ |
| 92 | ␉␉if (t > 5)␊ |
| 93 | ␉␉␉break;␉␉␉␉␉␉␉␉␉// break after 5ms␊ |
| 94 | }␊ |
| 95 | return inb(base + SMBHSTDAT);␊ |
| 96 | }␊ |
| 97 | ␊ |
| 98 | /* SPD i2c read optimization: prefetch only what we need, read non prefetcheable bytes on the fly */␊ |
| 99 | #define READ_SPD(spd, base, slot, x) spd[x] = smb_read_byte_intel(base, 0x50 + slot, x)␊ |
| 100 | ␊ |
| 101 | int spd_indexes[] = {␊ |
| 102 | ␉SPD_MEMORY_TYPE,␊ |
| 103 | ␉SPD_DDR3_MEMORY_BANK,␊ |
| 104 | ␉SPD_DDR3_MEMORY_CODE,␊ |
| 105 | ␉SPD_NUM_ROWS,␊ |
| 106 | ␉SPD_NUM_COLUMNS,␊ |
| 107 | ␉SPD_NUM_DIMM_BANKS,␊ |
| 108 | ␉SPD_NUM_BANKS_PER_SDRAM,␊ |
| 109 | ␉4,7,8,9,12,64, /* TODO: give names to these values */␊ |
| 110 | ␉95,96,97,98, 122,123,124,125 /* UIS */␊ |
| 111 | };␊ |
| 112 | #define SPD_INDEXES_SIZE (sizeof(spd_indexes) / sizeof(int))␊ |
| 113 | ␊ |
| 114 | /** Read from spd *used* values only*/␊ |
| 115 | static void init_spd(char * spd, uint32_t base, int slot)␊ |
| 116 | {␊ |
| 117 | ␉int i;␊ |
| 118 | ␉for (i=0; i< SPD_INDEXES_SIZE; i++) {␊ |
| 119 | ␉␉READ_SPD(spd, base, slot, spd_indexes[i]);␊ |
| 120 | ␉}␊ |
| 121 | }␊ |
| 122 | ␊ |
| 123 | /** Get Vendor Name from spd, 2 cases handled DDR3 and DDR2, ␊ |
| 124 | have different formats, always return a valid ptr.*/␊ |
| 125 | const char * getVendorName(RamSlotInfo_t* slot, uint32_t base, int slot_num)␊ |
| 126 | {␊ |
| 127 | uint8_t bank = 0;␊ |
| 128 | uint8_t code = 0;␊ |
| 129 | int i = 0;␊ |
| 130 | uint8_t * spd = (uint8_t *) slot->spd;␊ |
| 131 | ␊ |
| 132 | if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR3) { // DDR3␊ |
| 133 | bank = (spd[SPD_DDR3_MEMORY_BANK] & 0x07f); // constructors like Patriot use b7=1␊ |
| 134 | code = spd[SPD_DDR3_MEMORY_CODE];␊ |
| 135 | for (i=0; i < VEN_MAP_SIZE; i++)␊ |
| 136 | if (bank==vendorMap[i].bank && code==vendorMap[i].code)␊ |
| 137 | return vendorMap[i].name;␊ |
| 138 | }␊ |
| 139 | else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR2) {␊ |
| 140 | if(spd[64]==0x7f) {␊ |
| 141 | for (i=64; i<72 && spd[i]==0x7f;i++) {␊ |
| 142 | ␉␉␉ bank++;␊ |
| 143 | ␉␉␉ READ_SPD(spd, base, slot_num,i+1); // prefetch next spd byte to read for next loop␊ |
| 144 | ␉␉␉}␊ |
| 145 | ␉␉␉READ_SPD(spd, base, slot_num,i);␊ |
| 146 | code = spd[i];␊ |
| 147 | } else {␊ |
| 148 | code = spd[64]; ␊ |
| 149 | bank = 0;␊ |
| 150 | }␊ |
| 151 | for (i=0; i < VEN_MAP_SIZE; i++)␊ |
| 152 | if (bank==vendorMap[i].bank && code==vendorMap[i].code)␊ |
| 153 | return vendorMap[i].name;␊ |
| 154 | }␊ |
| 155 | /* OK there is no vendor id here lets try to match the partnum if it exists */␊ |
| 156 | if (strstr(slot->PartNo,"GU332") == slot->PartNo) // Unifosa fingerprint␊ |
| 157 | return "Unifosa";␊ |
| 158 | return "NoName";␊ |
| 159 | }␊ |
| 160 | ␊ |
| 161 | /** Get Default Memory Module Speed (no overclocking handled) */␊ |
| 162 | int getDDRspeedMhz(const char * spd)␊ |
| 163 | {␊ |
| 164 | if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR3) { ␊ |
| 165 | switch(spd[12]) {␊ |
| 166 | case 0x0f:␊ |
| 167 | return 1066;␊ |
| 168 | case 0x0c:␊ |
| 169 | return 1333;␊ |
| 170 | case 0x0a:␊ |
| 171 | return 1600;␊ |
| 172 | case 0x14:␊ |
| 173 | default:␊ |
| 174 | return 800;␊ |
| 175 | }␊ |
| 176 | } ␊ |
| 177 | else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR2) {␊ |
| 178 | switch(spd[9]) {␊ |
| 179 | case 0x50:␊ |
| 180 | return 400;␊ |
| 181 | case 0x3d:␊ |
| 182 | return 533;␊ |
| 183 | case 0x30:␊ |
| 184 | return 667;␊ |
| 185 | case 0x25:␊ |
| 186 | default:␊ |
| 187 | return 800;␊ |
| 188 | }␊ |
| 189 | }␊ |
| 190 | return 800; // default freq for unknown types␊ |
| 191 | }␊ |
| 192 | ␊ |
| 193 | #define SMST(a) ((uint8_t)((spd[a] & 0xf0) >> 4))␊ |
| 194 | #define SLST(a) ((uint8_t)(spd[a] & 0x0f))␊ |
| 195 | ␊ |
| 196 | /** Get DDR3 or DDR2 serial number, 0 most of the times, always return a valid ptr */␊ |
| 197 | const char *getDDRSerial(const char* spd)␊ |
| 198 | {␊ |
| 199 | static char asciiSerial[16];␊ |
| 200 | ␊ |
| 201 | if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR3) // DDR3␊ |
| 202 | {␊ |
| 203 | ␉sprintf(asciiSerial, "%X%X%X%X%X%X%X%X", SMST(122) /*& 0x7*/, SLST(122), SMST(123), SLST(123), SMST(124), SLST(124), SMST(125), SLST(125));␊ |
| 204 | }␊ |
| 205 | else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR2) // DDR2 or DDR␊ |
| 206 | { ␊ |
| 207 | ␉sprintf(asciiSerial, "%X%X%X%X%X%X%X%X", SMST(95) /*& 0x7*/, SLST(95), SMST(96), SLST(96), SMST(97), SLST(97), SMST(98), SLST(98));␊ |
| 208 | }␊ |
| 209 | ␊ |
| 210 | return strdup(asciiSerial);␊ |
| 211 | }␊ |
| 212 | ␊ |
| 213 | /** Get DDR3 or DDR2 Part Number, always return a valid ptr */␊ |
| 214 | const char * getDDRPartNum(char* spd, uint32_t base, int slot)␊ |
| 215 | {␊ |
| 216 | ␉static char asciiPartNo[32];␊ |
| 217 | ␉int i, start=0, index = 0;␊ |
| 218 | ␊ |
| 219 | if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR3) {␊ |
| 220 | ␉␉start = 128;␊ |
| 221 | ␉}␊ |
| 222 | else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR2) {␊ |
| 223 | ␉␉start = 73;␊ |
| 224 | ␉}␊ |
| 225 | ␉␊ |
| 226 | // Check that the spd part name is zero terminated and that it is ascii:␊ |
| 227 | bzero(asciiPartNo, sizeof(asciiPartNo));␊ |
| 228 | ␉char c;␊ |
| 229 | ␉for (i=start; i < start + sizeof(asciiPartNo); i++) {␊ |
| 230 | ␉␉READ_SPD(spd, base, slot, i); // only read once the corresponding model part (ddr3 or ddr2)␊ |
| 231 | ␉␉c = spd[i];␊ |
| 232 | ␉␉if (isalpha(c) || isdigit(c) || ispunct(c)) // It seems that System Profiler likes only letters and digits...␊ |
| 233 | ␉␉␉asciiPartNo[index++] = c;␊ |
| 234 | ␉␉if (isspace(c)) //Azi: this is the way that works properly for me!! The other gives me extra characters.␊ |
| 235 | ␉␉␉break;␊ |
| 236 | ␉}␊ |
| 237 | ␉␊ |
| 238 | ␉return strdup(asciiPartNo);␊ |
| 239 | return NULL;␊ |
| 240 | }␊ |
| 241 | ␊ |
| 242 | int mapping []= {0,2,1,3,4,6,5,7,8,10,9,11};␊ |
| 243 | ␊ |
| 244 | ␊ |
| 245 | /** Read from smbus the SPD content and interpret it for detecting memory attributes */␊ |
| 246 | static void read_smb_intel(pci_dt_t *smbus_dev)␊ |
| 247 | { ␊ |
| 248 | int i, speed;␊ |
| 249 | uint8_t spd_size, spd_type;␊ |
| 250 | uint32_t base;␊ |
| 251 | bool dump = false;␊ |
| 252 | RamSlotInfo_t* slot;␊ |
| 253 | ␊ |
| 254 | base = pci_config_read16(smbus_dev->dev.addr, 0x20) & 0xFFFE;␊ |
| 255 | DBG("Scanning smbus_dev <%04x, %04x> ...\n",smbus_dev->vendor_id, smbus_dev->device_id);␊ |
| 256 | ␊ |
| 257 | getBoolForKey("DumpSPD", &dump, &bootInfo->bootConfig);␊ |
| 258 | bool fullBanks = // needed at least for laptops␊ |
| 259 | Platform.DMI.MemoryModules == Platform.DMI.MaxMemorySlots;␊ |
| 260 | // Search MAX_RAM_SLOTS slots␊ |
| 261 | ␉char spdbuf[256];␊ |
| 262 | ␊ |
| 263 | for (i = 0; i < MAX_RAM_SLOTS; i++){␊ |
| 264 | slot = &Platform.RAM.DIMM[i];␊ |
| 265 | spd_size = smb_read_byte_intel(base, 0x50 + i, 0);␊ |
| 266 | // Check spd is present␊ |
| 267 | if (spd_size && (spd_size != 0xff) ) {␊ |
| 268 | ␊ |
| 269 | ␉␉␉slot->spd = spdbuf;␊ |
| 270 | slot->InUse = true;␊ |
| 271 | ␊ |
| 272 | bzero(slot->spd, spd_size);␊ |
| 273 | ␊ |
| 274 | // Copy spd data into buffer␊ |
| 275 | ␊ |
| 276 | ␉␉␉//for (x = 0; x < spd_size; x++) slot->spd[x] = smb_read_byte_intel(base, 0x50 + i, x);␊ |
| 277 | init_spd(slot->spd, base, i);␊ |
| 278 | ␉␉␉␊ |
| 279 | switch (slot->spd[SPD_MEMORY_TYPE]) {␊ |
| 280 | case SPD_MEMORY_TYPE_SDRAM_DDR2:␊ |
| 281 | ␊ |
| 282 | slot->ModuleSize = ((1 << (slot->spd[SPD_NUM_ROWS] & 0x0f) + (slot->spd[SPD_NUM_COLUMNS] & 0x0f) - 17) * ␊ |
| 283 | ((slot->spd[SPD_NUM_DIMM_BANKS] & 0x7) + 1) * slot->spd[SPD_NUM_BANKS_PER_SDRAM]);␊ |
| 284 | break;␊ |
| 285 | ␊ |
| 286 | case SPD_MEMORY_TYPE_SDRAM_DDR3:␊ |
| 287 | ␊ |
| 288 | slot->ModuleSize = ((slot->spd[4] & 0x0f) + 28 ) + ((slot->spd[8] & 0x7) + 3 );␊ |
| 289 | slot->ModuleSize -= (slot->spd[7] & 0x7) + 25;␊ |
| 290 | slot->ModuleSize = ((1 << slot->ModuleSize) * (((slot->spd[7] >> 3) & 0x1f) + 1));␊ |
| 291 | ␊ |
| 292 | break;␊ |
| 293 | }␊ |
| 294 | ␊ |
| 295 | spd_type = (slot->spd[SPD_MEMORY_TYPE] < ((char) 12) ? slot->spd[SPD_MEMORY_TYPE] : 0);␊ |
| 296 | slot->Type = spd_mem_to_smbios[spd_type];␊ |
| 297 | slot->PartNo = getDDRPartNum(slot->spd, base, i);␊ |
| 298 | slot->Vendor = getVendorName(slot, base, i);␊ |
| 299 | slot->SerialNo = getDDRSerial(slot->spd);␊ |
| 300 | ␊ |
| 301 | // determine spd speed␊ |
| 302 | speed = getDDRspeedMhz(slot->spd);␊ |
| 303 | if (slot->Frequency<speed) slot->Frequency = speed;␊ |
| 304 | ␉␉␉␊ |
| 305 | ␉␉␉// pci memory controller if available, is more reliable␊ |
| 306 | ␉␉␉if (Platform.RAM.Frequency > 0) {␊ |
| 307 | ␉␉␉␉uint32_t freq = (uint32_t)Platform.RAM.Frequency / 500000;␊ |
| 308 | ␉␉␉␉// now round off special cases␊ |
| 309 | ␉␉␉␉uint32_t fmod100 = freq %100;␊ |
| 310 | ␉␉␉␉switch(fmod100) {␊ |
| 311 | ␉␉␉␉␉case 1:␉freq--;␉break;␊ |
| 312 | ␉␉␉␉␉case 32:␉freq++;␉break;␊ |
| 313 | ␉␉␉␉␉case 65:␉freq++; break;␊ |
| 314 | ␉␉␉␉␉case 98:␉freq+=2;break;␊ |
| 315 | ␉␉␉␉␉case 99:␉freq++; break;␊ |
| 316 | ␉␉␉␉}␊ |
| 317 | ␉␉␉␉slot->Frequency = freq;␊ |
| 318 | ␉␉␉}␊ |
| 319 | ␉␉␉␊ |
| 320 | ␉␉␉verbose("Slot: %d Type %d %dMB (%s) %dMHz Vendor=%s\n PartNo=%s SerialNo=%s\n", ␊ |
| 321 | i, ␊ |
| 322 | (int)slot->Type,␊ |
| 323 | slot->ModuleSize, ␊ |
| 324 | spd_memory_types[spd_type],␊ |
| 325 | slot->Frequency,␊ |
| 326 | slot->Vendor,␊ |
| 327 | slot->PartNo,␊ |
| 328 | slot->SerialNo);␊ |
| 329 | ␉␉␉if(DEBUG_SPD) {␊ |
| 330 | dumpPhysAddr("spd content: ",slot->spd, spd_size);␊ |
| 331 | getc();␊ |
| 332 | }␊ |
| 333 | }␊ |
| 334 | ␊ |
| 335 | // laptops sometimes show slot 0 and 2 with slot 1 empty when only 2 slots are presents so:␊ |
| 336 | Platform.DMI.DIMM[i]= ␊ |
| 337 | i>0 && Platform.RAM.DIMM[1].InUse==false && fullBanks && Platform.DMI.MaxMemorySlots==2 ? ␊ |
| 338 | mapping[i] : i; // for laptops case, mapping setup would need to be more generic than this␊ |
| 339 | ␊ |
| 340 | ␉␉slot->spd = NULL;␊ |
| 341 | ␊ |
| 342 | } // for␊ |
| 343 | }␊ |
| 344 | ␊ |
| 345 | static struct smbus_controllers_t smbus_controllers[] = {␊ |
| 346 | ␊ |
| 347 | ␉{0x8086, 0x269B, "ESB2", read_smb_intel },␊ |
| 348 | ␉{0x8086, 0x25A4, "6300ESB", read_smb_intel },␊ |
| 349 | ␉{0x8086, 0x24C3, "ICH4", read_smb_intel },␊ |
| 350 | ␉{0x8086, 0x24D3, "ICH5", read_smb_intel },␊ |
| 351 | ␉{0x8086, 0x266A, "ICH6", read_smb_intel },␊ |
| 352 | ␉{0x8086, 0x27DA, "ICH7", read_smb_intel },␊ |
| 353 | ␉{0x8086, 0x283E, "ICH8", read_smb_intel },␊ |
| 354 | ␉{0x8086, 0x2930, "ICH9", read_smb_intel },␉␊ |
| 355 | ␉{0x8086, 0x3A30, "ICH10R", read_smb_intel },␊ |
| 356 | ␉{0x8086, 0x3A60, "ICH10B", read_smb_intel },␊ |
| 357 | ␉{0x8086, 0x3B30, "P55", read_smb_intel },␊ |
| 358 | ␉{0x8086, 0x5032, "EP80579", read_smb_intel }␊ |
| 359 | ␊ |
| 360 | };␊ |
| 361 | ␊ |
| 362 | // initial call : pci_dt = root_pci_dev;␊ |
| 363 | // find_and_read_smbus_controller(root_pci_dev);␊ |
| 364 | bool find_and_read_smbus_controller(pci_dt_t* pci_dt)␊ |
| 365 | {␊ |
| 366 | pci_dt_t␉*current = pci_dt;␊ |
| 367 | int i;␊ |
| 368 | ␊ |
| 369 | while (current) {␊ |
| 370 | #if 0␊ |
| 371 | printf("%02x:%02x.%x [%04x] [%04x:%04x] :: %s\n", ␊ |
| 372 | current->dev.bits.bus, current->dev.bits.dev, current->dev.bits.func, ␊ |
| 373 | current->class_id, current->vendor_id, current->device_id, ␊ |
| 374 | get_pci_dev_path(current));␊ |
| 375 | #endif␊ |
| 376 | ␉for ( i = 0; i < sizeof(smbus_controllers) / sizeof(smbus_controllers[0]); i++ )␊ |
| 377 | {␊ |
| 378 | if (current->vendor_id == smbus_controllers[i].vendor &&␊ |
| 379 | current->device_id == smbus_controllers[i].device)␊ |
| 380 | {␊ |
| 381 | smbus_controllers[i].read_smb(current); // read smb␊ |
| 382 | return true;␊ |
| 383 | } ␊ |
| 384 | }␊ |
| 385 | find_and_read_smbus_controller(current->children);␊ |
| 386 | current = current->next;␊ |
| 387 | }␊ |
| 388 | return false; // not found␊ |
| 389 | }␊ |
| 390 | ␊ |
| 391 | void scan_spd(PlatformInfo_t *p)␊ |
| 392 | {␊ |
| 393 | find_and_read_smbus_controller(root_pci_dev);␊ |
| 394 | }␊ |
| 395 | |
