[feat] add flash ld script and jump to flash

example/boot2/main.c

@@ -245,18 +245,12 @@ int main(void)
         }
     }
     if (boot_pin_high > boot_pin_low) {
-        printf("enter boot mode\r\n");
         while (1) {
             uart_state_machine(UART_ID_0);
         }
     } else {
-        printf("enter flash mode\r\n");
         flash_enter_quad_xip(6);
-        printf("xip success\r\n");
-        for (uint32_t i = 0; i < 32; i += 4) {
-            printf("0x%08lX: 0x%08lX\r\n", 0x10000200 + i, *(volatile uint32_t *)(0x10000200 + i));
-        }
-        jump_to_address(0x10100000);
+        jump_to_address(0x10010000 | 1);
     }
 
     return 0;

flash.ld

@@ -0,0 +1,63 @@
+ENTRY(isr_reset)
+
+MEMORY
+{
+    FLASH (rx)       :ORIGIN = 0x10010000, LENGTH = 4M - 64K
+    RAM (xrw)        :ORIGIN = 0x20000000, LENGTH = 256K
+}
+
+_stack_top = 0x20040000 + 4 * 1024;
+_stack_top_core1 = 0x20041000 + 4 * 1024;
+
+PHDRS
+{
+    fw_header PT_LOAD FLAGS(5); /* R + X */
+    text PT_LOAD FLAGS(5);      /* R + X */
+    rodata PT_LOAD FLAGS(6);    /* R + W */
+    data PT_LOAD FLAGS(6);      /* R + W */
+    bss PT_LOAD FLAGS(6);       /* R + W */
+}
+
+SECTIONS
+{
+    .fw_header :
+    {
+        . = ALIGN(4);
+        KEEP(*(.fw_header))
+        KEEP(*(.text.isr_reset))
+        . = ALIGN(4);
+    } >FLASH :fw_header
+
+    .text :
+    {
+        . = ALIGN(4);
+        *(*.text*)
+        . = ALIGN(4);
+    } >FLASH :text
+
+    .rodata :
+    {
+        . = ALIGN(4);
+        *(*.rodata*)
+        . = ALIGN(4);
+    } >FLASH :rodata
+
+    .data :
+    {
+        . = ALIGN(4);
+        _data_load = LOADADDR(.data);
+        _data_run = .;
+        *(*.data*)
+        . = ALIGN(4);
+        _data_run_end = .;
+    } >RAM AT>FLASH :data
+
+    .bss (NOLOAD) :
+    {
+        . = ALIGN(4);
+        _bss_run = .;
+        *(*.bss*)
+        . = ALIGN(4);
+        _bss_run_end = .;
+    } >RAM :bss
+}

project.build

@@ -12,7 +12,7 @@ CFLAGS += -fdata-sections
 CFLAGS += -Wpointer-arith
 
 ifneq ($(findstring -T, $(LDFLAGS)), -T)
-LDFLAGS += -T$(SDK_BASE_DIR)/ram.ld
+LDFLAGS += -T$(SDK_BASE_DIR)/flash.ld
 endif
 LDFLAGS += -mcpu=cortex-m0plus
 LDFLAGS += -mthumb