Texas Instruments TMS320TCI648x - Manual (Page 79)

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2.3.14 Bootload Capability
2.3.14.1 Configuration and Operation
SRIO Functional Description
SRIO_REGS->SP_RT_CTL = 0xFFFFFF00; // long
SRIO_REGS->SP_GEN_CTL = 0x40000000; // agent, master, undiscovered
SRIO_REGS->SP0_CTL = 0x00600000; // enable i/o
SRIO_REGS->SP1_CTL = 0x00600000; // enable i/o
SRIO_REGS->SP2_CTL = 0x00600000; // enable i/o
SRIO_REGS->SP3_CTL = 0x00600000; // enable i/o
SRIO_REGS->ERR_DET = 0x00000000 ; // clear
SRIO_REGS->ERR_EN = 0x00000000 ; // disable
SRIO_REGS->H_ADDR_CAPT = 0x00000000 ; // clear
SRIO_REGS->ADDR_CAPT = 0x00000000 ; // clear
SRIO_REGS->ID_CAPT = 0x00000000 ; // clear
SRIO_REGS->CTRL_CAPT = 0x00000000 ; // clear
SRIO_REGS->SP_IP_PW_IN_CAPT0 = 0x00000000 ; // clear
SRIO_REGS->SP_IP_PW_IN_CAPT1 = 0x00000000 ; // clear
SRIO_REGS->SP_IP_PW_IN_CAPT2 = 0x00000000 ; // clear
SRIO_REGS->SP_IP_PW_IN_CAPT3 = 0x00000000 ; // clear
//INIT_WAIT wait for lane initialization
Read register to check portx(1-4) OK bit
// polling SRIO_MAC's port_ok bit
rdata = SRIO_REGS->P0_ERR_STAT ;
while ((rdata & 0x00000002) != 0x00000002)
{
rdata = SRIO_REGS->P0_ERR_STAT ;
}
if (srio4p1x_mode){
rdata = SRIO_REGS->P1_ERR_STAT;
while ((rdata & 0x00000002) != 0x00000002)
{
rdata = SRIO_REGS->P1_ERR_STAT;
}
rdata = SRIO_REGS->P2_ERR_STAT;
while ((rdata & 0x00000002) != 0x00000002)
{
rdata = SRIO_REGS->P2_ERR_STAT;
}
rdata = SRIO_REGS->P3_ERR_STAT;
while ((rdata & 0x00000002) != 0x00000002)
{
rdata = SRIO_REGS->P3_ERR_STAT;
}
}
Assert the PEREN bit to enable logical layer data flow
SRIO_REGS->PCR = 0x00000004; // peren
Figure 41 illustrates the system components involved in bootload operation. It is assumed that an external
device will initiate the bootload data transfer and master the DMA interface. Upon reset, the following
sequence of events must occur:
1. DSP is placed in SRIO boot mode by HW mode pins.
2. Host takes DSP out of reset (POR or RST). The peripheral’s state machines and registers are reset.
3. Internal boot-strap ROM configures device registers, including SERDES, and DMA. DSP executes
internal ROM code to initialize SRIO.
•
Choice of 4 pin selectable configurations
•
Optionally, I2C boot can be used to configure SRIO
SPRUE13A – September 2006 Serial RapidIO (SRIO) 79
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