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Infrastructure for emulated CPUs: Bus arbitrator, Interrupt fielding processor

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This commit is contained in:
Joerg Hoppe
2019-08-16 19:04:12 +02:00
parent 155b02a089
commit 8ff33a0be1
16 changed files with 412 additions and 172 deletions
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14
10.01_base/2_src/arm/mailbox.cpp
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@@ -65,7 +65,7 @@ int mailbox_connect(void) {
void mailbox_print(void) {
printf("INFO: Content of mailbox to PRU:\n"
"arm2pru: req=0x%x, resp=0x%x\n", mailbox->arm2pru_req, mailbox->arm2pru_resp);
"arm2pru: req=0x%x\n", mailbox->arm2pru_req);
}
/* simulate simple register accesses:
@@ -101,17 +101,25 @@ void mailbox_test1() {
/* start cmd to PRU via mailbox. Wait until ready
* mailbox union members must have been filled.
*/
uint32_t xxx;
void mailbox_execute(uint8_t request) {
//uint32_t xxx;
bool mailbox_execute(uint8_t request) {
// write to arm2pru_req must be last memory operation
__sync_synchronize();
while (mailbox->arm2pru_req != ARM2PRU_NONE)
; // wait to complete
mailbox->arm2pru_req = request; // go!
// wait until ACKed
while (mailbox->arm2pru_req == request);
/*
do {
xxx = mailbox->arm2pru_req;
} while (xxx != ARM2PRU_NONE);
while (mailbox->arm2pru_req != ARM2PRU_NONE)
; // wait until processed
*/
// result false = error
return (mailbox->arm2pru_req == ARM2PRU_NONE) ;
}