change the params order of copy

intermezzo.S

@@ -9,10 +9,10 @@ _start:
 
     // First, we'll need to move ourselves _out_ of the target area.
     // We'll copy down into the start of the IRAM.
-    ldr r0, =post_relocation
-    ldr r1, =START_OF_IRAM
+    ldr r0, =START_OF_IRAM
+    ldr r1, =post_relocation
     ldr r2, =intermezzo_end
-    sub r2, r2, r0
+    sub r2, r2, r1
     bl  copy
 
     // Jump to the start of RAM, which should now contain the post-relocation code.
@@ -24,8 +24,8 @@ _start:
 post_relocation:
 
     // Next, we'll copy our payload down to the appropriate relocaiton address.
-    ldr r0, =LOAD_BLOCK_START
-    ldr r1, =RELOCATION_TARGET
+    ldr r0, =RELOCATION_TARGET
+    ldr r1, =LOAD_BLOCK_START
     ldr r2, =LOAD_BLOCK_LENGTH
     bl  copy
 
@@ -36,16 +36,16 @@ post_relocation:
 
 //
 // Simple block copy.
-//   r0 = source address
-//   r1 = destination address
+//   r0 = destination address
+//   r1 = source address
 //   r2 = length in bytes
-// Destroys r3.
+// Destroys r0-r3.
 //
 copy:
 
     // Copy the word...
-    ldr r3, [r0], #4
-    str r3, [r1], #4
+    ldr r3, [r1], #4
+    str r3, [r0], #4
 
     // And continue while we have words left to copy.
     subs r2, r2, #4