x1000: add TCSM section to linker script

This is intended for debugging OF kernel boot problems and has
to be enabled manually at compile time to make it usable.

Change-Id: Ie5ce9f0a7639be0acf5e3879cfc3a7b8b89caa5c

firmware/target/mips/ingenic_x1000/app.lds

@@ -23,6 +23,7 @@ MEMORY
 {
     IRAM : ORIGIN = X1000_IRAM_BASE, LENGTH = X1000_IRAM_SIZE
     DRAM : ORIGIN = X1000_DRAM_BASE, LENGTH = X1000_DRAM_SIZE
+    TCSM : ORIGIN = X1000_TCSM_BASE, LENGTH = X1000_TCSM_SIZE
 }
 
 SECTIONS
@@ -68,6 +69,14 @@ SECTIONS
     } > IRAM
     _iramcopy = LOADADDR(.iram);
 
+    .tcsm X1000_TCSM_BASE: AT (_bssbegin + SIZEOF(.iram))
+    {
+        _tcsmstart = .;
+        KEEP(*(.tcsm*));
+        _tcsmend = .;
+    } > TCSM
+    _tcsmcopy = LOADADDR(.tcsm);
+
     . = ALIGN(4);
     .stack (NOLOAD) :
     {

firmware/target/mips/ingenic_x1000/crt0.S

@@ -79,6 +79,19 @@ _iram_loop:
     bne     t1, t2, _iram_loop
     sw      t3, -4(t1)
 
+#if 0
+    /* Copy TCSM from BSS */
+    la      t0, _tcsmcopy
+    la      t1, _tcsmstart
+    la      t2, _tcsmend
+_tcsm_loop:
+    lw      t3, 0(t0)
+    addiu   t0, 4
+    sw      t3, 0(t1)
+    bne     t1, t2, _tcsm_loop
+    addiu   t1, 4
+#endif
+
     /* Clear the BSS segment (needed to zero-initialize C static values) */
     la      t0, _bssbegin
     la      t1, _bssend