Add IRAM tests

sw/sf2-test/main.c

@@ -18,7 +18,9 @@ extern void clear_bss(void);
 
 static enum t_test
   {
-   TEST_ECC_DE,
+   TEST_IRAM_DE,
+   TEST_IRAM_SE,
+   TEST_IRAM_SCRUB,
    TEST_WD,
    TEST_CPU1_RECOVER,
    TEST_CPU2_RECOVER,
@@ -153,16 +155,42 @@ main (void)
   v = SUPERVISOR->reset_cause;
   uart_put_hex_digit (v & 0x0f);
   uart_puts (", tst: ");
-  uart_put_hex_digit (next_test);
+  uart_put_hex_digit (next_test & 0x0f);
   uart_putc('\n');
 
   switch (next_test) {
-  case TEST_ECC_DE:
-    next_test = TEST_WD;
+  case TEST_IRAM_DE:
+    next_test = TEST_IRAM_SE;
     v = *(volatile unsigned *)0xfffc;
     unreachable();
     break;
 
+  case TEST_IRAM_SE:
+    /* Must have been corrected.  */
+    v = *(volatile unsigned *)0xfffc;
+    if (SUPERVISOR->iram_ecc_se != 0)
+      unreachable();
+    v = *(volatile unsigned *)0xfff8;
+    if (SUPERVISOR->iram_ecc_se != 1)
+      unreachable();
+    next_test = TEST_IRAM_SCRUB;
+    /* Fallthrough */
+
+  case TEST_IRAM_SCRUB:
+    if (SUPERVISOR->iram_scrub_se != 0
+        || SUPERVISOR->iram_scrub_de != 0)
+      unreachable();
+    uart_puts("Start IRAM scrubber");
+    SUPERVISOR->scrub_cfg = HYDRA_SUPERVISOR_REGS_SCRUB_CFG_IRAM_EN;
+    while (SUPERVISOR->iram_scrub_de == 0)
+      uart_putc('.');
+    uart_putc('\n');
+    if (SUPERVISOR->iram_scrub_se != 1
+        || SUPERVISOR->iram_scrub_de != 1)
+      unreachable();
+    next_test = TEST_WD;
+    /* Fallthrough */
+
   case TEST_WD:
     /* Test watchdog - infinite loop */
     next_test = TEST_CPU1_RECOVER;
@@ -214,6 +242,8 @@ main (void)
     /* Fallthrough */
 
   case TEST_DONE:
+  default:
+    next_test++;
     SUPERVISOR->wd_key = WD_KEY;
     SUPERVISOR->wd_period = 100000000;
     uart_puts ("Hello diot.\n");