From 6aa807d32170eb463ede46397cb43c1c4088cbe9 Mon Sep 17 00:00:00 2001
From: Rafaël Carré <rafael.carre@gmail.com>
Date: Thu, 4 Dec 2008 22:27:48 +0000
Subject: Sansa AMS: PCM driver (FS#9592)

Note that on low memory targets (Clip/m200v4 tested) you will encounter
random crashes. Applying FS#9332 seems to help a lot.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19342 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/as3525/app.lds | 53 +++++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 15 deletions(-)

(limited to 'firmware/target/arm/as3525/app.lds')

diff --git a/firmware/target/arm/as3525/app.lds b/firmware/target/arm/as3525/app.lds
index bf8e68f048..21cdac528b 100644
--- a/firmware/target/arm/as3525/app.lds
+++ b/firmware/target/arm/as3525/app.lds
@@ -6,6 +6,11 @@ OUTPUT_FORMAT(elf32-littlearm)
 OUTPUT_ARCH(arm)
 STARTUP(target/arm/crt0.o)
 
+#if MEMORYSIZE <= 2
+/* we put the codec buffer in IRAM */
+#define LOWMEM
+#endif
+
 #define PLUGINSIZE PLUGIN_BUFFER_SIZE
 #define CODECSIZE CODEC_SIZE
 
@@ -16,8 +21,15 @@ STARTUP(target/arm/crt0.o)
 #endif
 
 #include "cpu.h"
+
 #define IRAMSIZE 0x50000
+
+#ifdef LOWMEM
+#define DRAMSIZE (MEMORYSIZE * 0x100000) - STUBOFFSET - PLUGINSIZE
+#define CODECORIG (IRAMORIG + IRAMSIZE - CODEC_SIZE)
+#else
 #define DRAMSIZE (MEMORYSIZE * 0x100000) - STUBOFFSET - PLUGINSIZE - CODECSIZE
+#endif
 
 #define IRAMORIG 0x0
 #define DRAMORIG 0x30000000 + STUBOFFSET
@@ -26,11 +38,20 @@ STARTUP(target/arm/crt0.o)
 #define ENDAUDIOADDR  (DRAMORIG + DRAMSIZE)
 
 /* Where the codec buffer ends, and the plugin buffer starts */
+#ifdef LOWMEM
+#define ENDADDR (ENDAUDIOADDR)
+#else
 #define ENDADDR (ENDAUDIOADDR + CODECSIZE)
+#endif
 
 MEMORY
 {
+#ifdef LOWMEM
+    IRAM : ORIGIN = IRAMORIG, LENGTH = (IRAMSIZE - CODEC_SIZE)
+    CODEC_IRAM : ORIGIN = CODECORIG, LENGTH = CODEC_SIZE
+#else
     IRAM : ORIGIN = IRAMORIG, LENGTH = IRAMSIZE
+#endif
     DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
 }
 
@@ -69,8 +90,6 @@ SECTIONS
         *(.eh_frame)
     }
 
-    _initdata_end =.;
-
     .vectors IRAMORIG:
     {
         _vectors_start = .;
@@ -79,16 +98,7 @@ SECTIONS
 
     _vectorscopy = LOADADDR(.vectors);
 
-    .ibss (NOLOAD) :
-    {
-        _iedata = .;
-        *(.qharray)
-        *(.ibss)
-        . = ALIGN(0x4);
-        _iend = .;
-    } > IRAM
-
-    .iram _iend :
+    .iram :
     {
         _iramstart = .;
         *(.icode)
@@ -98,6 +108,15 @@ SECTIONS
         _iramend = .;
     } > IRAM AT> DRAM
 
+    .ibss (NOLOAD) :
+    {
+        _iedata = .;
+        *(.qharray)
+        *(.ibss)
+        . = ALIGN(0x4);
+        _iend = .;
+    } > IRAM
+
     _iramcopy = LOADADDR(.iram);
 
     .stack (NOLOAD) :
@@ -130,15 +149,19 @@ SECTIONS
         _audiobufend = .;
     } > DRAM
 
-    .codec ENDAUDIOADDR  (NOLOAD) :
+    .codec CODECORIG (NOLOAD) :
     {
         codecbuf = .;
         _codecbuf = .;
-    }
+#ifdef LOWMEM
+    } > CODEC_IRAM
+#else
+    } > DRAM
+#endif
 
     .plugin ENDADDR (NOLOAD) :
     {
         _pluginbuf = .;
         pluginbuf = .;
-    }
+    } > DRAM
 }
-- 
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