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/* Test exception escalation in armv7-m
*/
#include "armv7m.h"
#include "testme.h"
static
unsigned testseq;
#define SEQ() __atomic_add_fetch(&testseq, 1, __ATOMIC_RELAXED)
#define CHECK_SEQ(N) testEqI(N, SEQ(), "SEQ " #N)
static
void hard(void)
{
int test = SEQ();
switch(test) {
case 8:
case 11:
case 17:
testPass("in HardFault");
break;
default:
testFail("Fail HardFault");
abort();
}
}
static
void svc(void)
{
int test = SEQ();
switch(test) {
case 2:
case 14:
testPass("in SVC");
break;
default:
testFail("Fail SVC");
abort();
}
}
static __attribute__((unused))
void pendsv(void)
{
int test = SEQ();
switch(test) {
case 5:
testPass("in PendSV");
break;
default:
testFail("Fail PendSV");
abort();
}
}
void main(void)
{
run_table.hard = hard;
run_table.pendsv = pendsv;
run_table.svc = svc;
testInit(12);
out32(SCB(0xd0c), 0x05fa0000 | (PRIGROUP<<8));
CPSIE(if);
SEQ();
testDiag("trigger SVC");
SVC(42);
testDiag("Back in main");
CHECK_SEQ(3);
testDiag("trigger PendSV");
SEQ();
out32((void*)0xe000ed04, 1<<28);
testDiag("Back in main");
CHECK_SEQ(6);
testDiag("trigger HardFault via SVC escalating to HF due to PRIMASK");
SEQ();
CPSID(i); /* mask prio lower than -1 [0,255] */
SVC(42);
testDiag("Back in main");
CHECK_SEQ(9);
CPSIE(i);
basepri(1);
out32(SCB(0xd1c), PRIO(7,0)<<24); /* PRIO SVC */
//out32(SCB(0xd1c), 1<<21); /* PRIO PendSV */
testDiag("trigger HardFault via SVC escalating to HF due to priority");
SEQ();
SVC(42);
testDiag("Back in main");
CHECK_SEQ(12);
out32(SCB(0xd1c), PRIO(0,0)<<24); /* PRIO SVC */
testDiag("trigger SVC");
SEQ();
SVC(42);
testDiag("Back in main");
CHECK_SEQ(15);
out32(SCB(0xd1c), PRIO(2,0)<<24); /* PRIO SVC */
basepri(2);
testDiag("trigger HardFault via SVC escalating to HF due to BASEPRI");
SEQ();
SVC(42);
testDiag("Back in main");
CHECK_SEQ(18);
testDiag("Done");
}
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