From a3625630f54437e38883d275f36f732cbc9346a5 Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 25 Mar 2022 14:50:22 +0000
Subject: [PATCH] loop-test on hyperram read/write which needs carriage-return
 to activate

---
 coldboot/coldboot.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/coldboot/coldboot.c b/coldboot/coldboot.c
index 8b746d2..16de7a8 100644
--- a/coldboot/coldboot.c
+++ b/coldboot/coldboot.c
@@ -45,7 +45,7 @@ void memcpy(void *dest, void *src, size_t n) {
 void uart_writeuint32(uint32_t val) {
 	const char lut[] = { '0', '1', '2', '3', '4', '5', '6', '7',
                          '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
-	uint8_t *val_arr = &val;
+	uint8_t *val_arr = (uint8_t*)(&val);
 	size_t i;
 
 	for (i = 0; i < 4; i++) {
@@ -62,18 +62,26 @@ int main(void) {
 	const int kNumIterations = 14;
 	int res, failcnt = 0;
 	uint32_t tmp;
-	volatile uint32_t *ram = DRAM_BASE;
+	volatile uint32_t *ram = (uint32_t*)DRAM_BASE;
 	console_init();
 	//puts("Firmware launched...\n");
 
 	puts("fw..");
 #if 1
-	volatile uint32_t *hyperram = 0xa0000000;
-    // quick write/read
-    writel(0xDEAF0000, (unsigned long)&(hyperram[0]));
-    tmp = readl((unsigned long)&(hyperram[0]));
-	puts("read ");
-	uart_writeuint32(tmp);
+	volatile uint32_t *hyperram = (uint32_t*)0xa0000000;
+    while (1) {
+        unsigned char c = getchar();
+        putchar(c);
+        if (c == 13) { // if CR send LF
+
+            // quick write/read
+            writel(0xDEAF0000, (unsigned long)&(hyperram[0]));
+            tmp = readl((unsigned long)&(hyperram[0]));
+            puts("read ");
+            uart_writeuint32(tmp);
+            putchar(10);
+        }
+    }
 
     return 0;
 #endif
@@ -164,7 +172,7 @@ int main(void) {
         for (size_t i = 0; i < kNumIterations; i++) {
             if (readl((unsigned long)&(ram[i])) != (0xDEAF0000 | i*4)) {
                 puts("fail : *(0x");
-                uart_writeuint32(&ram[i]);
+                uart_writeuint32((unsigned long)(&ram[i]));
                 puts(") = ");
                 uart_writeuint32(ram[i]);
                 puts("\n");
-- 
2.30.2