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CloverBootloader/rEFIt_UEFI/Platform/spd.c
Sergey Isakov 7c0aa811ec initial commit Clover sources 5061 and modules from EDK2 latest with legacy codes from UDK2018 
Signed-off-by: Sergey Isakov <isakov-sl@bk.ru>
2019-09-03 12:58:42 +03:00

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/*
* spd.c - serial presence detect memory information
implementation for reading memory spd
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
*
* Originally restored from pcefi10.5 by netkas
* Dynamic mem detection original impl. by Rekursor
* System profiler fix and other fixes by Mozodojo.
* Slice 2011 remade for UEFI
* XMP detection - apianti
*/
//
#include "Platform.h"
#include "spd.h"
#include "memvendors.h"
#ifndef DEBUG_SPD
#ifndef DEBUG_ALL
#define DEBUG_SPD 0
#else
#define DEBUG_SPD DEBUG_ALL
#endif
#endif
#if DEBUG_SPD == 0
#define DBG(...)
#else
#define DBG(...) DebugLog(DEBUG_SPD, __VA_ARGS__)
#endif
//extern EFI_DATA_HUB_PROTOCOL *gDataHub;
extern MEM_STRUCTURE gRAM;
//extern DMI* gDMI;
//==>
extern UINT16 TotalCount;
//<==
BOOLEAN smbIntel;
UINT8 smbPage;
CHAR8 *spd_memory_types[] =
{
"RAM", /* 00h Undefined */
"FPM", /* 01h FPM */
"EDO", /* 02h EDO */
"", /* 03h PIPELINE NIBBLE */
"SDRAM", /* 04h SDRAM */
"", /* 05h MULTIPLEXED ROM */
"DDR SGRAM", /* 06h SGRAM DDR */
"DDR SDRAM", /* 07h SDRAM DDR */
"DDR2 SDRAM", /* 08h SDRAM DDR 2 */
"", /* 09h Undefined */
"", /* 0Ah Undefined */
"DDR3 SDRAM", /* 0Bh SDRAM DDR 3 */
"DDR4 SDRAM" /* 0Ch SDRAM DDR 4 */
};
#define UNKNOWN_MEM_TYPE 2
UINT8 spd_mem_to_smbios[] =
{
UNKNOWN_MEM_TYPE, /* 00h Undefined */
UNKNOWN_MEM_TYPE, /* 01h FPM */
UNKNOWN_MEM_TYPE, /* 02h EDO */
UNKNOWN_MEM_TYPE, /* 03h PIPELINE NIBBLE */
SMB_MEM_TYPE_SDRAM, /* 04h SDRAM */
SMB_MEM_TYPE_ROM, /* 05h MULTIPLEXED ROM */
SMB_MEM_TYPE_SGRAM, /* 06h SGRAM DDR */
SMB_MEM_TYPE_DDR, /* 07h SDRAM DDR */
SMB_MEM_TYPE_DDR2, /* 08h SDRAM DDR 2 */
UNKNOWN_MEM_TYPE, /* 09h Undefined */
UNKNOWN_MEM_TYPE, /* 0Ah Undefined */
SMB_MEM_TYPE_DDR3, /* 0Bh SDRAM DDR 3 */
SMB_MEM_TYPE_DDR4 /* 0Ch SDRAM DDR 4 */
};
#define SPD_TO_SMBIOS_SIZE (sizeof(spd_mem_to_smbios)/sizeof(UINT8))
//define rdtsc(low,high) UINT64=AsmReadTsc()
//define outb(port, val) IoWrite8(port, val)
//define val=inb(port) val=IoRead(port)
// Intel SMB reg offsets
#define SMBHSTSTS 0
#define SMBHSTCNT 2
#define SMBHSTCMD 3
#define SMBHSTADD 4
#define SMBHSTDAT 5
#define SMBHSTDAT1 6
#define SBMBLKDAT 7
// MCP and nForce SMB reg offsets
#define SMBHPRTCL_NV 0 /* protocol, PEC */
#define SMBHSTSTS_NV 1 /* status */
#define SMBHSTADD_NV 2 /* address */
#define SMBHSTCMD_NV 3 /* command */
#define SMBHSTDAT_NV 4 /* 32 data registers */
//
// XMP memory profile
#define SPD_XMP_SIG1 176
#define SPD_XMP_SIG1_VALUE 0x0C
#define SPD_XMP_SIG2 177
#define SPD_XMP_SIG2_VALUE 0x4A
#define SPD_XMP_PROFILES 178
#define SPD_XMP_VERSION 179
#define SPD_XMP_PROF1_DIVISOR 180
#define SPD_XMP_PROF1_DIVIDEND 181
#define SPD_XMP_PROF2_DIVISOR 182
#define SPD_XMP_PROF2_DIVIDEND 183
#define SPD_XMP_PROF1_RATIO 186
#define SPD_XMP_PROF2_RATIO 221
#define SPD_XMP20_SIG1 0x180
#define SPD_XMP20_SIG2 0x181
#define SPD_XMP20_PROFILES 0x182
#define SPD_XMP20_VERSION 0x183
/* 0x189 */
#define SPD_XMP20_PROF1_MINCYCLE 0x18C
#define SPD_XMP20_PROF1_FINEADJUST 0x1AF
/* 0x1B8 */
#define SPD_XMP20_PROF2_MINCYCLE 0x1BB
#define SPD_XMP20_PROF2_FINEADJUST 0x1DE
/* 0x1E7 */
UINT16 spd_indexes_ddr[] = {
/* 3 */ SPD_NUM_ROWS, /* ModuleSize */
/* 4 */ SPD_NUM_COLUMNS,
/* 5 */ SPD_NUM_DIMM_BANKS,
/* 17 */ SPD_NUM_BANKS_PER_SDRAM,
9, /* Frequency */
64, /* Manufacturer */
95,96,97,98, /* UIS */
0
};
UINT16 spd_indexes_ddr3[] = {
4,7,8, /* ModuleSize */
10,11,12, /* Frequency */
/* 0x75, 0x76 */ SPD_DDR3_MEMORY_BANK, SPD_DDR3_MEMORY_CODE, /* Manufacturer */
122,123,124,125, /* UIS */
/* XMP */
SPD_XMP_SIG1,
SPD_XMP_SIG2,
SPD_XMP_PROFILES,
SPD_XMP_VERSION,
SPD_XMP_PROF1_DIVISOR,
SPD_XMP_PROF1_DIVIDEND,
SPD_XMP_PROF2_DIVISOR,
SPD_XMP_PROF2_DIVIDEND,
SPD_XMP_PROF1_RATIO,
SPD_XMP_PROF2_RATIO,
0
};
UINT16 spd_indexes_ddr4[] = {
4,6,12,13, /* ModuleSize */
18,125, /* Frequency */
SPD_DDR4_MANUFACTURER_ID_BANK, SPD_DDR4_MANUFACTURER_ID_CODE, /* Manufacturer */
325,326,327,328, /* UIS */
/* XMP 2.0 */
SPD_XMP20_SIG1,
SPD_XMP20_SIG2,
SPD_XMP20_PROFILES,
SPD_XMP20_VERSION,
SPD_XMP20_PROF1_MINCYCLE,
SPD_XMP20_PROF1_FINEADJUST,
SPD_XMP20_PROF2_MINCYCLE,
SPD_XMP20_PROF2_FINEADJUST,
0
};
/** Read one byte from i2c, used for reading SPD */
UINT8 smb_read_byte(UINT32 base, UINT8 adr, UINT16 cmd)
{
// INTN l1, h1, l2, h2;
UINT64 t, t1, t2;
UINT8 page;
UINT8 c;
// UINT8 p;
if (smbIntel) {
IoWrite8(base + SMBHSTSTS, 0x1f); // reset SMBus Controller (set busy)
IoWrite8(base + SMBHSTDAT, 0xff);
t1 = AsmReadTsc(); //rdtsc(l1, h1);
while ( IoRead8(base + SMBHSTSTS) & 0x01) { // wait until host is not busy
t2 = AsmReadTsc(); //rdtsc(l2, h2);
t = DivU64x64Remainder((t2 - t1),
DivU64x32(gCPUStructure.TSCFrequency, 1000),
0);
if (t > 5) {
DBG("host is busy for too long for byte %2X:%d!\n", adr, cmd);
return 0xFF; // break
}
}
page = (cmd >> 8) & 1;
if (page != smbPage) {
// p = 0xFF;
IoWrite8(base + SMBHSTCMD, 0x00);
IoWrite8(base + SMBHSTADD, 0x6C + (page << 1)); // Set SPD Page Address
#if 0
IoWrite8(base + SMBHSTCNT, 0x48); // Start + Byte Data Write
// Don't use "Byte Data Write" because status goes from 0x41 (Busy) -> 0x44 (Error)
#else
IoWrite8(base + SMBHSTCNT, 0x40); // Start + Quick Write
// status goes from 0x41 (Busy) -> 0x42 (Completed)
#endif
smbPage = page;
t1 = AsmReadTsc();
while (!( (c=IoRead8(base + SMBHSTSTS)) & 0x02)) { // wait until command finished
t2 = AsmReadTsc();
t = DivU64x64Remainder((t2 - t1), DivU64x32(gCPUStructure.TSCFrequency, 1000), 0);
/*
if (c != p) {
DBG("%02d %02X spd page change status %2X\n", t, cmd, c);
p = c;
}
*/
if (c & 4) {
DBG("spd page change error for byte %2X:%d!\n", adr, cmd);
break;
}
if (t > 5) {
DBG("spd page change taking too long for byte %2X:%d!\n", adr, cmd);
break; // break after 5ms
}
}
return smb_read_byte(base, adr, cmd);
}
// p = 0xFF;
IoWrite8(base + SMBHSTCMD, (UINT8)(cmd & 0xFF)); // SMBus uses 8 bit commands
IoWrite8(base + SMBHSTADD, (adr << 1) | 0x01 ); // read from spd
IoWrite8(base + SMBHSTCNT, 0x48 ); // Start + Byte Data Read
// status goes from 0x41 (Busy) -> 0x42 (Completed) or 0x44 (Error)
t1 = AsmReadTsc();
while (!( (c=IoRead8(base + SMBHSTSTS)) & 0x02)) { // wait until command finished
t2 = AsmReadTsc();
t = DivU64x64Remainder((t2 - t1), DivU64x32(gCPUStructure.TSCFrequency, 1000), 0);
/*
if (c != p) {
DBG("%02d %02X spd read status %2X\n", t, cmd, c);
p = c;
}
*/
if (c & 4) {
// This alway happens when trying to read the memory type (cmd 2) of an empty slot
// DBG("spd byte read error for byte %2X:%d!\n", adr, cmd);
break;
}
if (t > 5) {
// if (cmd != 2)
DBG("spd byte read taking too long for byte %2X:%d!\n", adr, cmd);
break; // break after 5ms
}
}
return IoRead8(base + SMBHSTDAT);
}
else {
IoWrite8(base + SMBHSTSTS_NV, 0x1f); // reset SMBus Controller
IoWrite8(base + SMBHSTDAT_NV, 0xff);
t1 = AsmReadTsc(); //rdtsc(l1, h1);
while ( IoRead8(base + SMBHSTSTS_NV) & 0x01) { // wait until read
t2 = AsmReadTsc(); //rdtsc(l2, h2);
t = DivU64x64Remainder((t2 - t1),
DivU64x32(gCPUStructure.TSCFrequency, 1000),
0);
if (t > 5)
return 0xFF; // break
}
IoWrite8(base + SMBHSTSTS_NV, 0x00); // clear status register
IoWrite16(base + SMBHSTCMD_NV, cmd);
IoWrite8(base + SMBHSTADD_NV, (adr << 1) | 0x01 );
IoWrite8(base + SMBHPRTCL_NV, 0x07 );
t1 = AsmReadTsc();
while (!( IoRead8(base + SMBHSTSTS_NV) & 0x9F)) { // wait till command finished
t2 = AsmReadTsc();
t = DivU64x64Remainder((t2 - t1),
DivU64x32(gCPUStructure.TSCFrequency, 1000),
0);
if (t > 5)
break; // break after 5ms
}
return IoRead8(base + SMBHSTDAT_NV);
}
}
/* SPD i2c read optimization: prefetch only what we need, read non prefetcheable bytes on the fly */
#define READ_SPD(spd, base, slot, x) spd[x] = smb_read_byte(base, 0x50 + slot, x)
/** Read from spd *used* values only*/
VOID init_spd(UINT16* spd_indexes, UINT8* spd, UINT32 base, UINT8 slot)
{
UINT16 i;
for (i=0; spd_indexes[i]; i++) {
READ_SPD(spd, base, slot, spd_indexes[i]);
}
#if 0
DBG("Reading entire spd data\n");
for (i = 0; i < 512; i++) {
UINT8 b = smb_read_byte(base, 0x50 + slot, i);
DBG("%02X", b);
}
DBG(".\n");
#endif
}
// Get Vendor Name from spd, 3 cases handled DDR3, DDR4 and DDR2,
// have different formats, always return a valid ptr.
CHAR8* getVendorName(RAM_SLOT_INFO* slot, UINT8 *spd, UINT32 base, UINT8 slot_num)
{
UINT8 bank = 0;
UINT8 code = 0;
UINT8 parity;
UINT8 testbit;
INTN i = 0;
//UINT8 * spd = (UINT8 *) slot->spd;
if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR4) { // DDR4
bank = spd[SPD_DDR4_MANUFACTURER_ID_BANK];
code = spd[SPD_DDR4_MANUFACTURER_ID_CODE];
parity = bank;
testbit = bank;
for (i=6; i >= 0; i--) { parity ^= (testbit <<= 1); }
if ( (parity & 0x80) == 0 ) {
DBG("Bad parity bank=0x%2X code=0x%2X\n", bank, code);
}
bank &= 0x7f;
for (i=0; i < VEN_MAP_SIZE; i++) {
if (bank==vendorMap[i].bank && code==vendorMap[i].code) {
return vendorMap[i].name;
}
}
DBG("Unknown vendor bank=0x%2X code=0x%2X\n", bank, code);
} else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR3) { // DDR3
bank = spd[SPD_DDR3_MEMORY_BANK]; // constructors like Patriot use b7=1
code = spd[SPD_DDR3_MEMORY_CODE];
parity = bank;
testbit = bank;
for (i=6; i >= 0; i--) { parity ^= (testbit <<= 1); }
if ( (parity & 0x80) == 0 ) {
DBG("Bad parity bank=0x%2X code=0x%2X\n", bank, code);
}
bank &= 0x7f;
for (i=0; i < VEN_MAP_SIZE; i++) {
if (bank==vendorMap[i].bank && code==vendorMap[i].code) {
return vendorMap[i].name;
}
}
} else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR2 ||
spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR) {
if(spd[64]==0x7f) {
for (i=64; i<72 && spd[i]==0x7f;i++) {
bank++;
READ_SPD(spd, base, slot_num, (UINT8)(i+1)); // prefetch next spd byte to read for next loop
}
READ_SPD(spd, base, slot_num, (UINT8)i);
code = spd[i];
} else {
code = spd[64];
bank = 0;
}
for (i=0; i < VEN_MAP_SIZE; i++) {
if (bank==vendorMap[i].bank && code==vendorMap[i].code) {
return vendorMap[i].name;
}
}
}
/* OK there is no vendor id here lets try to match the partnum if it exists */
if (AsciiStrStr(slot->PartNo,"GU332") == slot->PartNo) { // Unifosa fingerprint
return "Unifosa";
}
return "NoName";
}
/** Get Default Memory Module Speed (no overclocking handled) */
UINT16 getDDRspeedMhz(UINT8 * spd)
{
UINT16 frequency = 0; // default freq for unknown types //shit! DDR1 = 533
UINT16 xmpFrequency1 = 0, xmpFrequency2 = 0;
UINT8 xmpVersion = 0;
UINT8 xmpProfiles = 0;
if (spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR4) {
UINT16 mincycle = spd[18];
INT8 fineadjust = spd[125];
frequency = (UINT16)(2000000 / (mincycle * 125 + fineadjust));
// Check if module supports XMP
if ((spd[SPD_XMP20_SIG1] == SPD_XMP_SIG1_VALUE) &&
(spd[SPD_XMP20_SIG2] == SPD_XMP_SIG2_VALUE)) {
xmpVersion = spd[SPD_XMP20_VERSION];
xmpProfiles = spd[SPD_XMP20_PROFILES] & 3;
if ((xmpProfiles & 1) == 1) {
// Check the first profile
mincycle = spd[SPD_XMP20_PROF1_MINCYCLE];
fineadjust = spd[SPD_XMP20_PROF1_FINEADJUST];
xmpFrequency1 = (UINT16)(2000000 / (mincycle * 125 + fineadjust));
DBG("XMP Profile1: %d*125 %d ns\n", mincycle, fineadjust);
}
if ((xmpProfiles & 2) == 2) {
// Check the second profile
mincycle = spd[SPD_XMP20_PROF2_MINCYCLE];
fineadjust = spd[SPD_XMP20_PROF2_FINEADJUST];
xmpFrequency2 = (UINT16)(2000000 / (mincycle * 125 + fineadjust));
DBG("XMP Profile2: %d*125 %d ns\n", mincycle, fineadjust);
}
}
} else if (spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR3) {
// This should be multiples of MTB converted to MHz- apianti
UINT16 divisor = spd[10];
UINT16 dividend = spd[11];
UINT16 ratio = spd[12];
frequency = (((dividend != 0) && (divisor != 0) && (ratio != 0)) ?
((2000 * dividend) / (divisor * ratio)) : 0);
// Check if module supports XMP
if ((spd[SPD_XMP_SIG1] == SPD_XMP_SIG1_VALUE) &&
(spd[SPD_XMP_SIG2] == SPD_XMP_SIG2_VALUE)) {
xmpVersion = spd[SPD_XMP_VERSION];
xmpProfiles = spd[SPD_XMP_PROFILES] & 3;
if ((xmpProfiles & 1) == 1) {
// Check the first profile
divisor = spd[SPD_XMP_PROF1_DIVISOR];
dividend = spd[SPD_XMP_PROF1_DIVIDEND];
ratio = spd[SPD_XMP_PROF1_RATIO];
xmpFrequency1 = (((dividend != 0) && (divisor != 0) && (ratio != 0)) ?
((2000 * dividend) / (divisor * ratio)) : 0);
DBG("XMP Profile1: %d*%d/%dns\n", ratio, divisor, dividend);
}
if ((xmpProfiles & 2) == 2) {
// Check the second profile
divisor = spd[SPD_XMP_PROF2_DIVISOR];
dividend = spd[SPD_XMP_PROF2_DIVIDEND];
ratio = spd[SPD_XMP_PROF2_RATIO];
xmpFrequency2 = (((dividend != 0) && (divisor != 0) && (ratio != 0)) ?
((2000 * dividend) / (divisor * ratio)) : 0);
DBG("XMP Profile2: %d*%d/%dns\n", ratio, divisor, dividend);
}
}
} else if ((spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR2) ||
(spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR)) {
switch(spd[9]) {
case 0x50:
return 400;
case 0x3d:
return 533;
case 0x30:
return 667;
case 0x25:
default:
return 800;
case 0x1E:
return 1066;
}
}
if (xmpProfiles) {
DBG("Found module with XMP version %d.%d\n", (xmpVersion >> 4) & 0xF, xmpVersion & 0xF);
switch (gSettings.XMPDetection) {
case 0:
// Detect the better XMP profile
if (xmpFrequency1 >= xmpFrequency2) {
if (xmpFrequency1 >= frequency) {
DBG("Using XMP Profile1 instead of standard frequency %dMHz\n", frequency);
frequency = xmpFrequency1;
}
} else if (xmpFrequency2 >= frequency) {
DBG("Using XMP Profile2 instead of standard frequency %dMHz\n", frequency);
frequency = xmpFrequency2;
}
break;
case 1:
// Use first profile if present
if ((xmpProfiles & 1) == 1) {
frequency = xmpFrequency1;
DBG("Using XMP Profile1 instead of standard frequency %dMHz\n", frequency);
} else {
DBG("Not using XMP Profile1 because it is not present\n");
}
break;
case 2:
// Use second profile
if ((xmpProfiles & 2) == 2) {
frequency = xmpFrequency2;
DBG("Using XMP Profile2 instead of standard frequency %dMHz\n", frequency);
} else {
DBG("Not using XMP Profile2 because it is not present\n");
}
break;
default:
break;
}
} else {
// Print out XMP not detected
switch (gSettings.XMPDetection) {
case 0:
DBG("Not using XMP because it is not present\n");
break;
case 1:
case 2:
DBG("Not using XMP Profile%d because it is not present\n", gSettings.XMPDetection);
break;
default:
break;
}
}
return frequency;
}
#define SMST(a) ((UINT8)((spd[a] & 0xf0) >> 4))
#define SLST(a) ((UINT8)(spd[a] & 0x0f))
/** Get DDR3 or DDR2 serial number, 0 most of the times, always return a valid ptr */
CHAR8* getDDRSerial(UINT8* spd)
{
CHAR8* asciiSerial; //[16];
asciiSerial = AllocatePool(17);
if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR4) { // DDR4
AsciiSPrint(asciiSerial, 17, "%2X%2X%2X%2X%2X%2X%2X%2X", SMST(325) /*& 0x7*/, SLST(325), SMST(326), SLST(326), SMST(327), SLST(327), SMST(328), SLST(328));
} else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR3) { // DDR3
AsciiSPrint(asciiSerial, 17, "%2X%2X%2X%2X%2X%2X%2X%2X", SMST(122) /*& 0x7*/, SLST(122), SMST(123), SLST(123), SMST(124), SLST(124), SMST(125), SLST(125));
} else if (spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR2 ||
spd[SPD_MEMORY_TYPE]==SPD_MEMORY_TYPE_SDRAM_DDR) { // DDR2 or DDR
AsciiSPrint(asciiSerial, 17, "%2X%2X%2X%2X%2X%2X%2X%2X", SMST(95) /*& 0x7*/, SLST(95), SMST(96), SLST(96), SMST(97), SLST(97), SMST(98), SLST(98));
} else {
AsciiStrCpyS(asciiSerial, 17, "0000000000000000");
}
return asciiSerial;
}
/** Get DDR2 or DDR3 or DDR4 Part Number, always return a valid ptr */
CHAR8* getDDRPartNum(UINT8* spd, UINT32 base, UINT8 slot)
{
UINT16 i, start=0, index = 0;
CHAR8 c;
CHAR8* asciiPartNo = AllocatePool(32); //[32];
if (spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR4) {
start = 329;
} else if (spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR3) {
start = 128;
} else if (spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR2 ||
spd[SPD_MEMORY_TYPE] == SPD_MEMORY_TYPE_SDRAM_DDR) {
start = 73;
}
// Check that the spd part name is zero terminated and that it is ascii:
ZeroMem(asciiPartNo, 32); //sizeof(asciiPartNo));
for (i = start; i < start + 20; i++) {
READ_SPD(spd, base, slot, (UINT16)i); // only read once the corresponding model part (ddr3 or ddr2)
c = spd[i];
if (IS_ALFA(c) || IS_DIGIT(c) || IS_PUNCT(c)) // It seems that System Profiler likes only letters and digits...
asciiPartNo[index++] = c;
else if (c < 0x20)
break;
}
return asciiPartNo;
}
//INTN mapping []= {0,2,1,3,4,6,5,7,8,10,9,11};
#define PCI_COMMAND_OFFSET 0x04
/** Read from smbus the SPD content and interpret it for detecting memory attributes */
STATIC VOID read_smb(EFI_PCI_IO_PROTOCOL *PciIo, UINT16 vid, UINT16 did)
{
// EFI_STATUS Status;
UINT16 speed;
UINT8 i;// spd_size, spd_type;
UINT32 base, mmio, hostc;
UINT16 Command;
//RAM_SLOT_INFO* slot;
//BOOLEAN fullBanks;
UINT8* spdbuf;
// UINT16 vid, did;
UINT8 TotalSlotsCount;
smbPage = 0; // valid pages are 0 and 1; assume the first page (page 0) is already selected
// vid = gPci->Hdr.VendorId;
// did = gPci->Hdr.DeviceId;
/*Status = */PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint16,
PCI_COMMAND_OFFSET,
1,
&Command
);
Command |= 1;
/*Status = */PciIo->Pci.Write (
PciIo,
EfiPciIoWidthUint16,
PCI_COMMAND_OFFSET,
1,
&Command
);
DBG("SMBus CmdReg: 0x%x\n", Command);
/*Status = */PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0x10,
1,
&mmio
);
if (vid == 0x8086) {
/*Status = */PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0x20,
1,
&base
);
base &= 0xFFFE;
smbIntel = TRUE;
}
else {
/*Status = */PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0x24, // iobase offset 0x24 on MCP
1,
&base
);
base &= 0xFFFC;
smbIntel = FALSE;
}
/*Status = */PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0x40,
1,
&hostc
);
MsgLog("Scanning SMBus [%04x:%04x], mmio: 0x%x, ioport: 0x%x, hostc: 0x%x\n",
vid, did, mmio, base, hostc);
// needed at least for laptops
//fullBanks = (gDMI->MemoryModules == gDMI->CntMemorySlots);
spdbuf = AllocateZeroPool(MAX_SPD_SIZE);
// Search MAX_RAM_SLOTS slots
//==>
/* TotalSlotsCount = (UINT8) TotalCount;
if (!TotalSlotsCount) {
TotalSlotsCount = MAX_RAM_SLOTS;
} */
TotalSlotsCount = 8; //MAX_RAM_SLOTS; -- spd can read only 8 slots
DBG("Slots to scan [%d]...\n", TotalSlotsCount);
for (i = 0; i < TotalSlotsCount; i++){
//<==
ZeroMem(spdbuf, MAX_SPD_SIZE);
READ_SPD(spdbuf, base, i, SPD_MEMORY_TYPE);
if (spdbuf[SPD_MEMORY_TYPE] == 0xFF) {
//DBG("SPD[%d]: Empty\n", i);
continue;
}
else if (spdbuf[SPD_MEMORY_TYPE] == 0) {
// First 0x40 bytes of DDR4 spd second page is 0. Maybe we need to change page, so do that and retry.
DBG("SPD[%d]: Got invalid type %d @0x%x. Will set page and retry.\n", i, spdbuf[SPD_MEMORY_TYPE], 0x50 + i);
smbPage = 0xFF; // force page to be set
READ_SPD(spdbuf, base, i, SPD_MEMORY_TYPE);
}
// Copy spd data into buffer
DBG("SPD[%d]: Type %d @0x%x\n", i, spdbuf[SPD_MEMORY_TYPE], 0x50 + i);
switch (spdbuf[SPD_MEMORY_TYPE]) {
case SPD_MEMORY_TYPE_SDRAM_DDR:
init_spd(spd_indexes_ddr, spdbuf, base, i);
gRAM.SPD[i].Type = MemoryTypeDdr;
gRAM.SPD[i].ModuleSize = (((1 << ((spdbuf[SPD_NUM_ROWS] & 0x0f)
+ (spdbuf[SPD_NUM_COLUMNS] & 0x0f) - 17)) *
((spdbuf[SPD_NUM_DIMM_BANKS] & 0x7) + 1) *
spdbuf[SPD_NUM_BANKS_PER_SDRAM])/3)*2;
break;
case SPD_MEMORY_TYPE_SDRAM_DDR2:
init_spd(spd_indexes_ddr, spdbuf, base, i);
gRAM.SPD[i].Type = MemoryTypeDdr2;
gRAM.SPD[i].ModuleSize = ((1 << ((spdbuf[SPD_NUM_ROWS] & 0x0f)
+ (spdbuf[SPD_NUM_COLUMNS] & 0x0f) - 17)) *
((spdbuf[SPD_NUM_DIMM_BANKS] & 0x7) + 1) *
spdbuf[SPD_NUM_BANKS_PER_SDRAM]);
break;
case SPD_MEMORY_TYPE_SDRAM_DDR3:
init_spd(spd_indexes_ddr3, spdbuf, base, i);
gRAM.SPD[i].Type = MemoryTypeDdr3;
gRAM.SPD[i].ModuleSize = ((spdbuf[4] & 0x0f) + 28 ) + ((spdbuf[8] & 0x7) + 3 );
gRAM.SPD[i].ModuleSize -= (spdbuf[7] & 0x7) + 25;
gRAM.SPD[i].ModuleSize = ((1 << gRAM.SPD[i].ModuleSize) * (((spdbuf[7] >> 3) & 0x1f) + 1));
break;
case SPD_MEMORY_TYPE_SDRAM_DDR4:
init_spd(spd_indexes_ddr4, spdbuf, base, i);
gRAM.SPD[i].Type = MemoryTypeDdr4;
gRAM.SPD[i].ModuleSize
= (1 << ((spdbuf[4] & 0x0f) + 8 /* Mb */ - 3 /* MB */)) // SDRAM Capacity
* (1 << ((spdbuf[13] & 0x07) + 3)) // Primary Bus Width
/ (1 << ((spdbuf[12] & 0x07) + 2)) // SDRAM Width
* (((spdbuf[12] >> 3) & 0x07) + 1) // Logical Ranks per DIMM
* (((spdbuf[6] & 0x03) == 2) ? (((spdbuf[6] >> 4) & 0x07) + 1) : 1);
/*
Total = SDRAM Capacity / 8 * Primary Bus Width / SDRAM Width * Logical Ranks per DIMM
where:
: SDRAM Capacity = SPD byte 4 bits 3~0
: Primary Bus Width = SPD byte 13 bits 2~0
: SDRAM Width = SPD byte 12 bits 2~0
: Logical Ranks per DIMM =
for SDP, DDP, QDP: = SPD byte 12 bits 5~3
for 3DS: = SPD byte 12 bits 5~3
times SPD byte 6 bits 6~4 (Die Count)
SDRAM Capacity
0 0000 = 256 Mb
1 0001 = 512 Mb
2 0010 = 1 Gb
3 0011 = 2 Gb
4 0100 = 4 Gb
5 0101 = 8 Gb
6 0110 = 16 Gb
7 0111 = 32 Gb
Primary Bus Width
000 = 8 bits
001 = 16 bits
010 = 32 bits
011 = 64 bits
SDRAM Device Width
000 = 4 bits
001 = 8 bits
010 = 16 bits
011 = 32 bits
Logical Ranks per DIMM for SDP, DDP, QDP
000 = 1 Package Rank
001 = 2 Package Ranks
010 = 3 Package Ranks
011 = 4 Package Ranks
Die Count for 3DS
000 = Single die 001 = 2 die
010 = 3 die
011 = 4 die
100 = 5 die
101 = 6 die
110 = 7 die
111 = 8 die
*/
break;
default:
gRAM.SPD[i].ModuleSize = 0;
break;
}
if (gRAM.SPD[i].ModuleSize == 0) continue;
//spd_type = (slot->spd[SPD_MEMORY_TYPE] < ((UINT8) 12) ? slot->spd[SPD_MEMORY_TYPE] : 0);
//gRAM Type = spd_mem_to_smbios[spd_type];
gRAM.SPD[i].PartNo = getDDRPartNum(spdbuf, base, i);
gRAM.SPD[i].Vendor = getVendorName(&(gRAM.SPD[i]), spdbuf, base, i);
gRAM.SPD[i].SerialNo = getDDRSerial(spdbuf);
//XXX - when we can FreePool allocated for these buffers?
// determine spd speed
speed = getDDRspeedMhz(spdbuf);
DBG("DDR speed %dMHz\n", speed);
if (gRAM.SPD[i].Frequency<speed) gRAM.SPD[i].Frequency = speed;
#if 0
// pci memory controller if available, is more reliable
if (gRAM.Frequency > 0) {
UINT32 freq = (UINT32)DivU64x32(gRAM.Frequency, 500000);
// now round off special cases
UINT32 fmod100 = freq %100;
switch(fmod100) {
case 1: freq--; break;
case 32: freq++; break;
case 65: freq++; break;
case 98: freq+=2;break;
case 99: freq++; break;
}
gRAM.SPD[i].Frequency = freq;
DBG("RAM speed %dMHz\n", freq);
}
#endif
MsgLog("Slot: %d Type %d %dMB %dMHz Vendor=%a PartNo=%a SerialNo=%a\n",
i,
(int)gRAM.SPD[i].Type,
gRAM.SPD[i].ModuleSize,
gRAM.SPD[i].Frequency,
gRAM.SPD[i].Vendor,
gRAM.SPD[i].PartNo,
gRAM.SPD[i].SerialNo);
gRAM.SPD[i].InUse = TRUE;
++(gRAM.SPDInUse);
//}
// laptops sometimes show slot 0 and 2 with slot 1 empty when only 2 slots are presents so:
//gDMI->DIMM[i]= (UINT32)((i>0 && gRAM->DIMM[1].InUse==FALSE && !fullBanks && TotalCount == 2)?mapping[i] : i); // for laptops case, mapping setup would need to be more generic than this
//slot->spd = NULL;
} // for
if (smbPage != 0) {
READ_SPD(spdbuf, base, 0, 0); // force first page when we're done
}
}
VOID ScanSPD()
{
EFI_STATUS Status;
EFI_HANDLE *HandleBuffer = NULL;
// EFI_GUID **ProtocolGuidArray;
EFI_PCI_IO_PROTOCOL *PciIo = NULL;
UINTN HandleCount;
// UINTN ArrayCount;
UINTN Index;
// UINTN ProtocolIndex;
PCI_TYPE00 gPci;
DbgHeader("ScanSPD");
// Scan PCI handles
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiPciIoProtocolGuid,
NULL,
&HandleCount,
&HandleBuffer
);
if (!EFI_ERROR (Status)) {
for (Index = 0; Index < HandleCount; ++Index) {
Status = gBS->HandleProtocol(HandleBuffer[Index], &gEfiPciIoProtocolGuid, (VOID **)&PciIo);
if (!EFI_ERROR (Status)) {
// Read PCI BUS
//PciIo->GetLocation (PciIo, &Segment, &Bus, &Device, &Function);
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0,
sizeof (gPci) / sizeof (UINT32),
&gPci
);
//SmBus controller has class = 0x0c0500
if ((gPci.Hdr.ClassCode[2] == 0x0c) && (gPci.Hdr.ClassCode[1] == 5)
&& (gPci.Hdr.ClassCode[0] == 0) && (gPci.Hdr.VendorId == 0x8086 || gPci.Hdr.VendorId == 0x10DE)) {
DBG ("SMBus device : %04x %04x class=%02x%02x%02x status=%r\n",
gPci.Hdr.VendorId,
gPci.Hdr.DeviceId,
gPci.Hdr.ClassCode[2],
gPci.Hdr.ClassCode[1],
gPci.Hdr.ClassCode[0],
Status
);
read_smb(PciIo, gPci.Hdr.VendorId, gPci.Hdr.DeviceId);
}
}
}
}
// Scan PCI BUS For SmBus controller
/* Status = gBS->LocateHandleBuffer(AllHandles,NULL,NULL,&HandleCount,&HandleBuffer);
if (!EFI_ERROR(Status)) {
for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {
Status = gBS->ProtocolsPerHandle(HandleBuffer[HandleIndex],&ProtocolGuidArray,&ArrayCount);
if (!EFI_ERROR(Status)) {
for (ProtocolIndex = 0; ProtocolIndex < ArrayCount; ProtocolIndex++) {
if (CompareGuid(&gEfiPciIoProtocolGuid, ProtocolGuidArray[ProtocolIndex])) {
Status = gBS->OpenProtocol(HandleBuffer[HandleIndex],&gEfiPciIoProtocolGuid,(VOID **)&PciIo,gImageHandle,NULL,EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (!EFI_ERROR(Status)) {
// Read PCI BUS
Status = PciIo->Pci.Read (
PciIo,
EfiPciIoWidthUint32,
0,
sizeof (gPci) / sizeof (UINT32),
&gPci
);
//SmBus controller has class = 0x0c0500
if ((gPci.Hdr.ClassCode[2] == 0x0c) && (gPci.Hdr.ClassCode[1] == 5)
&& (gPci.Hdr.ClassCode[0] == 0) && (gPci.Hdr.VendorId == 0x8086 || gPci.Hdr.VendorId == 0x10DE)) {
read_smb(PciIo);
}
}
}
}
}
}
}
*/
}
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