sdmmc: update test program to read first two sectors of sd card

exosphere/sdmmc_test/source/utils.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+#include <stdarg.h>
+#include "utils.h"
+#include "di.h"
+#include "se.h"
+#include "fuse.h"
+#include "pmc.h"
+#include "timers.h"
+#include "panic.h"
+#include "car.h"
+
+#include <inttypes.h>
+
+void wait(uint32_t microseconds) {
+    uint32_t old_time = TIMERUS_CNTR_1US_0;
+    while (TIMERUS_CNTR_1US_0 - old_time <= microseconds) {
+        /* Spin-lock. */
+    }
+}
+
+__attribute__ ((noreturn)) void generic_panic(void) {
+    panic(0xFF000006);
+}
+
+__attribute__((noinline)) bool overlaps(uint64_t as, uint64_t ae, uint64_t bs, uint64_t be)
+{
+    if(as <= bs && bs <= ae)
+        return true;
+    if(bs <= as && as <= be)
+        return true;
+    return false;
+}