DM320: Regorganize LCD and TTB memory layout

Do not introduce any change for M:Robe 500 as it uses the two LCD frames
in non-obvious way.

Sansa Connect and Creative ZVM use only single front framebuffer.
Place TTB at DRAM end to minimize memory loss due to alignment.
Reserve as little as possible memory for the LCD frames.
On Sansa Connect this change extends audio buffer by 858 KiB.

Change-Id: I21bdeec4cfba86d71803a39acd651a87e73767e6

1 files changed, 4 insertions, 0 deletions

diff --git a/firmware/export/dm320.h b/firmware/export/dm320.h
index 01f206bfc9..bd6ca15407 100644
--- a/firmware/export/dm320.h
+++ b/firmware/export/dm320.h
@@ -30,13 +30,17 @@
 #if !defined(__ASSEMBLER__) && !defined(__LD__)
 /* These variables are created during linking (app/boot.lds) */
 extern unsigned long _lcdbuf;
+#ifdef MROBE_500
 extern unsigned long _lcdbuf2;
+#endif
 extern unsigned long _ttbstart;
 #endif
 
 #define TTB_BASE_ADDR    (_ttbstart) /* End of memory */
 #define FRAME            ((short *) (&_lcdbuf))  /* Right after TTB */
+#ifdef MROBE_500
 #define FRAME2            ((short *) (&_lcdbuf2))  /* Right after FRAME */
+#endif
 
 #define PHY_IO_BASE      0x00030000
 #define DM320_REG(addr)  (*(volatile unsigned short *)(PHY_IO_BASE + (addr)))