Add eboot

bootloaders/eboot/eboot.c

@@ -0,0 +1,86 @@
+/* Copyright (c) 2015 Ivan Grokhotkov. All rights reserved. 
+ * This file is part of eboot bootloader.
+ *
+ * Redistribution and use is permitted according to the conditions of the
+ * 3-clause BSD license to be found in the LICENSE file.
+ */
+
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "eboot.h"
+extern void* flashchip;
+
+#define SWRST do { (*((volatile uint32_t*) 0x60000700)) |= 0x80000000; } while(0);
+
+
+int load_app_from_flash_raw(const uint32_t flash_addr)
+{
+    image_header_t image_header;
+    uint32_t pos = flash_addr + APP_START_OFFSET;
+
+    if (SPIRead(pos, &image_header, sizeof(image_header))) {
+        return 1;
+    }
+    pos += sizeof(image_header);
+    
+
+    for (uint32_t section_index = 0;
+        section_index < image_header.num_segments; 
+        ++section_index)
+    {
+        section_header_t section_header = {0};
+        if (SPIRead(pos, &section_header, sizeof(section_header))) {
+            return 2;
+        }
+        pos += sizeof(section_header);
+
+        const uint32_t address = section_header.address;
+
+        bool load = false;
+
+        if (address < 0x40000000) {
+            load = true;
+        }
+
+        if (address >= 0x40100000 && address < 0x40108000) {
+            load = true;
+        }
+
+        if (address >= 0x60000000) {
+            load = true;
+        }
+
+        if (!load) {
+            pos += section_header.size;
+            continue;
+        }
+
+        if (SPIRead(pos, (void*)address, section_header.size))
+            return 3;
+
+        pos += section_header.size;
+    }
+
+    register uint32_t sp asm("a1") = 0x3ffffff0;
+    register uint32_t pc asm("a3") = image_header.entry;
+    __asm__  __volatile__ ("jx a3");
+
+    return 0;
+}
+
+
+void main()
+{
+    int res = load_app_from_flash_raw(0);
+    if (res) {
+        ets_putc('\n');
+        ets_putc('#');
+        ets_putc('0' + res);
+        ets_putc('\n');
+        SWRST;
+    }
+
+    while(true){}
+}