app_hifive1: improved debug (app RAM moved ahead to help debugging RAM

code + optional naked version of write_page()

Author: danielinux

test-app/RISCV.ld

@@ -5,7 +5,7 @@ ENTRY( _reset )
 MEMORY
 {
   FLASH(rxai!w) : ORIGIN = 0x20020100, LENGTH = 256K - 0x100
-  RAM(wxa!ri) : ORIGIN = 0x80000000, LENGTH = 16K
+  RAM(wxa!ri) : ORIGIN = 0x80001000, LENGTH = 12K
 }
 
 SECTIONS

test-app/hifive1_write_page.c

@@ -1,11 +1,31 @@
 #include <stdint.h>
 #include "hal.h"
+#include "target.h"
+#include "wolfboot/wolfboot.h"
+
 #define PAGESIZE (0x1000) /* Flash sector: 4K */
 extern uint8_t flash_page[];
 
+
+#ifdef APP_DEBUG_WRITE_PAGE
+__attribute__((used,naked,section(".ramcode.user"))) 
+void write_page(uint32_t dst)
+{
+    asm volatile ("addi sp, sp, -4");
+    asm volatile ("sw ra, 0(sp)");
+    if (dst == 0x60000)
+        wolfBoot_erase_partition(0x01);
+    hal_flash_write(dst, flash_page, PAGESIZE);
+    asm volatile ("lw a4, 0(sp)");
+    asm volatile ("addi sp, sp, 4");
+    asm volatile ("jr a4");
+}
+#endif
+
 __attribute__((used,section(".ramcode.user"))) 
 void write_page(uint32_t dst)
 {
-    hal_flash_erase(dst, PAGESIZE);
+    if (dst == 0x60000)
+        wolfBoot_erase_partition(0x01);
     hal_flash_write(dst, flash_page, PAGESIZE);
 }