| #define SMBHSTCMD 3␊ |
| #define SMBHSTADD 4␊ |
| #define SMBHSTDAT 5␊ |
| #define SBMBLKDAT 7␊ |
| ␊ |
| /** Read one byte from the intel i2c, used for reading SPD on intel chipsets only. */␊ |
| unsigned char smb_read_byte_intel(uint32_t base, uint8_t adr, uint8_t cmd)␊ |
| {␊ |
| int l1, h1, l2, h2;␊ |
| unsigned long long t;␊ |
| ␉␊ |
| outb(base + SMBHSTSTS, 0x1f);␉␉␉␉␉// reset SMBus Controller␊ |
| outb(base + SMBHSTDAT, 0xff);␊ |
| ␉␊ |
| while( inb(base + SMBHSTSTS) & 0x01);␉␉␉// wait until ready␊ |
| ␉␊ |
| outb(base + SMBHSTCMD, cmd);␊ |
| outb(base + SMBHSTADD, (adr << 1) | 0x01 );␊ |
| outb(base + SMBHSTCNT, 0x48 );␊ |
| ␉␊ |
| rdtsc(l1, h1);␊ |
| ␉␊ |
| ␉while (!( inb(base + SMBHSTSTS) & 0x02))␉␉// wait til command finished␊ |
| ␉{␉␊ |
| ␉␉rdtsc(l2, h2);␊ |
| ␉␉t = ((h2 - h1) * 0xffffffff + (l2 - l1)) / (Platform.CPU.TSCFrequency / 40);␊ |
| ␉␉if (t > 10)␊ |
| ␉␉␉break;␉␉␉␉␉␉␉␉␉// break after 10ms␊ |
| }␊ |
| return inb(base + SMBHSTDAT);␊ |
| }␊ |
| ␊ |
| /** Get Vendor Name from spd, 2 cases handled DDR3 and DDR2, ␊ |
| have different formats, always return a valid ptr.*/␊ |
| const char * getVendorName(RamSlotInfo_t* slot)␊ |
|
| "N/A" : sPart;␊ |
| }␊ |
| ␊ |
| /** Read one byte from the intel i2c, used for reading SPD on intel chipsets only. */␊ |
| unsigned char smb_read_byte_intel(uint32_t base, uint8_t adr, uint8_t cmd)␊ |
| {␊ |
| int l1, h1, l2, h2;␊ |
| unsigned long long t;␊ |
| ␉␊ |
| outb(base + SMBHSTSTS, 0x1f);␉␉␉␉␉// reset SMBus Controller␊ |
| outb(base + SMBHSTDAT, 0xff);␊ |
| ␉␊ |
| while( inb(base + SMBHSTSTS) & 0x01);␉␉␉// wait until ready␊ |
| ␉␊ |
| outb(base + SMBHSTCMD, cmd);␊ |
| outb(base + SMBHSTADD, (adr << 1) | 0x01 );␊ |
| outb(base + SMBHSTCNT, 0x48 );␊ |
| ␉␊ |
| rdtsc(l1, h1);␊ |
| ␉␊ |
| ␉while (!( inb(base + SMBHSTSTS) & 0x02))␉␉// wait til command finished␊ |
| ␉{␉␊ |
| ␉␉rdtsc(l2, h2);␊ |
| ␉␉t = ((h2 - h1) * 0xffffffff + (l2 - l1)) / (Platform.CPU.TSCFrequency / 40);␊ |
| ␉␉if (t > 10)␊ |
| ␉␉␉break;␉␉␉␉␉␉␉␉␉// break after 10ms␊ |
| }␊ |
| return inb(base + SMBHSTDAT);␊ |
| }␊ |
| ␊ |
| int mapping []= {0,2,1,3,4,6,5,7,8,10,9,11};␊ |
| ␊ |
| /** Read from smbus the SPD content and interpret it for detecting memory attributes */␊ |
