Specifications

INTELLIGENT PLATFORM MANAGEMENT INTERFACE
PP 41x/03x 7-13
7.6 Programming Examples
7.6.1 Using the SMIC Interface
The PP 41x/03x board utilizes the Server Management Interface Controller (SMIC) as its interface
with the I/O ports at the standard addresses (i.e. 0CA9h, 0CAAh and 0CABh). The IPMI
specification has a complete description of the SMIC interface. The following C program fragment
reads and writes IPMI messages using the SMIC interface:
/* Addresses of SMIC registers */
#define SMIC_DATA 0x0CA9 /* Data Register */
#define SMIC_CONTROL 0x0CAA /* Control & Status Register */
#define SMIC_FLAGS 0x0CAB /* Flag Register */
/* SMS Transfer Stream Control Codes */
#define CC_SMS_GET_STATUS 0x40
#define CC_SMS_WR_START 0x41
#define CC_SMS_WR_NEXT 0x42
#define CC_SMS_WR_END 0x43
#define CC_SMS_RD_START 0x44
#define CC_SMS_RD_NEXT 0x45
#define CC_SMS_RD_END 0x46
/* SMS Transfer Stream Status Codes */
#define SC_SMS_RDY 0xC0
#define SC_SMS_WR_START 0xC1
#define SC_SMS_WR_NEXT 0xC2
#define SC_SMS_WR_END 0xC3
#define SC_SMS_RD_START 0xC4
#define SC_SMS_RD_NEXT 0xC5
#define SC_SMS_RD_END 0xC6
/* Masks for SMIC Flags Registers Bits */
#define FLAG_RX_DATA_RDY 0x80
#define FLAG_TX_DATA_RDY 0x40
#define FLAG_SMI 0x10
#define FLAG_EVT_ATN 0x08
#define FLAG_SMS_ATN 0x04
#define FLAG_BUSY 0x01
#define FLAGS_BUSY 0x01
#define FLAGS_TX_DATA_READY 0x40
#define FLAGS_RX_DATA_READY 0x80
/* macros */
#define bReadSmicFlags (inb (SMIC_FLAGS))
#define bReadSmicStatus (inb (SMIC_CONTROL))
#define bReadSmicData (inb (SMIC_DATA))
#define vWriteSmicControl(data) outb(SMIC_CONTROL, data)
#define vWriteSmicData(data) outb(SMIC_DATA, data)
#define vWriteSmicFlags(data) outb(SMIC_FLAGS, data)