int main() {
proc_interface_t hwti;
// Get HWTI base address from user PVR register
int hwti_base;
getpvr(1,hwti_base);
// Disable instruction and data cache
microblaze_invalidate_icache();
microblaze_disable_icache();
microblaze_invalidate_dcache();
microblaze_disable_dcache();
// Nano-kernel loop...
while(1) {
// Setup interface
// * Perform this upon each iteration, just in case the memory
// map for the MB-HWTI is corrupted.
initialize_interface(&hwti,(int*)(hwti_base));
#if 0 // Commented out as this is not necessary and it creates the opportunity for a race between reset and start commands
// Wait to be "reset"
// -- NOTE: Ignore reset as it has no meaning to the MB-HWTI
// and it seems causes a race, as the controlling processor
// sends a reset, immediately followed by a "go" command. Therefore
// the "reset" command can be missed.
wait_for_reset_command(&hwti);
#endif
// Wait to be "started"
wait_for_go_command(&hwti);
//xil_printf("Thread started (fcn @ 0x%08x), arg = 0x%08x!!!\r\n",*(hwti.fcn_reg), *(hwti.arg_reg));
// Setup r20 for thread, this can be used to enforce -fPIC (Position-independent code) for the MB
// (r20 is used as part of the GOT, to make things PC-relative)
mtgpr(r20, *(hwti.fcn_reg));
// Boostrap thread (wraps up thread execution with a thread exit)
// * Pull out thread argument, and thread start function
_bootstrap_thread(&hwti, *(hwti.fcn_reg), *(hwti.arg_reg));
}
return 0;
}
int main() {
proc_interface_t hwti;
// Get HWTI base address from user PVR register
int hwti_base;
unsigned char cpu_id; // only 8bits
getpvr(1,hwti_base);
// Disable instruction and data cache
microblaze_invalidate_icache();
microblaze_enable_icache();
microblaze_invalidate_dcache();
microblaze_disable_dcache();
//Determine if uB is first on bus
getpvr(0, cpu_id);
// Timer pointers
volatile unsigned long long * timer = (unsigned long long *) LOCAL_TIMER;
volatile unsigned int * timer_reset = (unsigned int *) (LOCAL_TIMER + RESET_REG);
// Reset timer
*timer_reset = CMD_RESET;
// Indicate to CoreTest.c running on host that this processor is running
volatile unsigned int * check = (unsigned int *) EXTRA_BRAM;
// assign cpus_per_bus offset
check = (unsigned int *)
((unsigned int) check + ( ((unsigned int) cpu_id) * 0x100));
// write OKAY_VALUE to common memory (extra_bram)
*check = OKAY_VALUE;
// Nano-kernel loop...
while(1) {
// Setup interface
// * Perform this upon each iteration, just in case the memory
// map for the MB-HWTI is corrupted.
initialize_interface(&hwti,(int*)(hwti_base));
#if 0 // Commented out as this is not necessary and it creates the opportunity for a race between reset and start commands
// Wait to be "reset"
// -- NOTE: Ignore reset as it has no meaning to the MB-HWTI
// and it seems causes a race, as the controlling processor
// sends a reset, immediately followed by a "go" command. Therefore
// the "reset" command can be missed.
wait_for_reset_command(&hwti);
#endif
// Wait to be "started"
wait_for_go_command(&hwti);
//xil_printf("Thread started (fcn @ 0x%08x), arg = 0x%08x!!!\r\n",*(hwti.fcn_reg), *(hwti.arg_reg));
// Setup r20 for thread, this can be used to enforce -fPIC (Position-independent code) for the MB
// (r20 is used as part of the GOT, to make things PC-relative)
mtgpr(r20, *(hwti.fcn_reg));
// Boostrap thread (wraps up thread execution with a thread exit)
// * Pull out thread argument, and thread start function
_bootstrap_thread(&hwti, *(hwti.fcn_reg), *(hwti.arg_reg));
}
return 0;
}
