Enable nocache sections using the linker. PP5022/4 must use SW_CORELOCK now with shared variables in DRAM (it seems swp(b) is at least partially broken on all PP or I'm doing something very wrong here :\). For core-shared data use SHAREDBSS/DATA_ATTR. NOCACHEBSS/DATA_ATTR is available whether or not single core is forced for static peripheral-DMA buffer allocation without use of the UNCACHED_ADDR macro in code and is likely useful on a non-PP target with a data cache (although not actually enabled in config.h and the .lds's in this commit).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16981 a1c6a512-1295-4272-9138-f99709370657

40 files changed, 322 insertions, 125 deletions

diff --git a/apps/codecs/spc.c b/apps/codecs/spc.c
index 0a608dfa4a..948a05edd8 100644
--- a/apps/codecs/spc.c
+++ b/apps/codecs/spc.c
@@ -231,7 +231,7 @@ static struct
     struct event emu_evt_reply;
     intptr_t retval;
     struct sample_queue_chunk wav_chunk[WAV_NUM_CHUNKS];
-} sample_queue NOCACHEBSS_ATTR;
+} sample_queue SHAREDBSS_ATTR;
 
 static inline void samples_release_wrbuf(void)
 {
diff --git a/apps/codecs/spc/spc_codec.h b/apps/codecs/spc/spc_codec.h
index a18aece645..f9127ef778 100644
--- a/apps/codecs/spc/spc_codec.h
+++ b/apps/codecs/spc/spc_codec.h
@@ -97,10 +97,10 @@
 #endif
 
 #if SPC_DUAL_CORE
-    #undef NOCACHEBSS_ATTR
-    #define NOCACHEBSS_ATTR __attribute__ ((section(".ibss")))
-    #undef NOCACHEDATA_ATTR
-    #define NOCACHEDATA_ATTR __attribute__((section(".idata")))
+    #undef SHAREDBSS_ATTR
+    #define SHAREDBSS_ATTR __attribute__ ((section(".ibss")))
+    #undef SHAREDDATA_ATTR
+    #define SHAREDDATA_ATTR __attribute__((section(".idata")))
 #endif
 #endif
 
diff --git a/apps/playback.c b/apps/playback.c
index b145823485..8fa94468fb 100644
--- a/apps/playback.c
+++ b/apps/playback.c
@@ -172,7 +172,7 @@ enum filling_state {
 #endif
 
 bool audio_is_initialized = false;
-static bool audio_thread_ready NOCACHEBSS_ATTR = false;
+static bool audio_thread_ready SHAREDBSS_ATTR = false;
 
 /* Variables are commented with the threads that use them: *
  * A=audio, C=codec, V=voice. A suffix of - indicates that *
@@ -180,9 +180,9 @@ static bool audio_thread_ready NOCACHEBSS_ATTR = false;
 /* TBD: Split out "audio" and "playback" (ie. calling) threads */
 
 /* Main state control */
-static volatile bool audio_codec_loaded NOCACHEBSS_ATTR = false; /* Codec loaded? (C/A-) */
-static volatile bool playing NOCACHEBSS_ATTR = false; /* Is audio playing? (A) */
-static volatile bool paused NOCACHEBSS_ATTR = false; /* Is audio paused? (A/C-) */
+static volatile bool audio_codec_loaded SHAREDBSS_ATTR = false; /* Codec loaded? (C/A-) */
+static volatile bool playing SHAREDBSS_ATTR = false; /* Is audio playing? (A) */
+static volatile bool paused SHAREDBSS_ATTR = false; /* Is audio paused? (A/C-) */
 
 /* Ring buffer where compressed audio and codecs are loaded */
 static unsigned char *filebuf = NULL;       /* Start of buffer (A/C-) */
@@ -261,8 +261,8 @@ static size_t buffer_margin  = 0; /* Buffer margin aka anti-skip buffer (A/C-) *
 static void set_filebuf_watermark(int seconds, size_t max);
 
 /* Audio thread */
-static struct event_queue       audio_queue NOCACHEBSS_ATTR;
-static struct queue_sender_list audio_queue_sender_list NOCACHEBSS_ATTR;
+static struct event_queue       audio_queue SHAREDBSS_ATTR;
+static struct queue_sender_list audio_queue_sender_list SHAREDBSS_ATTR;
 static long audio_stack[(DEFAULT_STACK_SIZE + 0x1000)/sizeof(long)];
 static const char audio_thread_name[] = "audio";
 
@@ -273,7 +273,7 @@ static void audio_reset_buffer(void);
 
 /* Codec thread */
 extern struct codec_api ci;
-static struct event_queue codec_queue NOCACHEBSS_ATTR;
+static struct event_queue codec_queue SHAREDBSS_ATTR;
 static struct queue_sender_list codec_queue_sender_list;
 static long codec_stack[(DEFAULT_STACK_SIZE + 0x2000)/sizeof(long)]
 IBSS_ATTR;
@@ -281,7 +281,7 @@ static const char codec_thread_name[] = "codec";
 struct thread_entry *codec_thread_p; /* For modifying thread priority later. */
 
 /* PCM buffer messaging */
-static struct event_queue pcmbuf_queue NOCACHEBSS_ATTR;
+static struct event_queue pcmbuf_queue SHAREDBSS_ATTR;
 
 /* Function to be called by pcm buffer callbacks.
  * Permissible Context(s): Audio interrupt
diff --git a/apps/plugins/mpegplayer/alloc.c b/apps/plugins/mpegplayer/alloc.c
index f6661d4632..7ad8644e59 100644
--- a/apps/plugins/mpegplayer/alloc.c
+++ b/apps/plugins/mpegplayer/alloc.c
@@ -30,10 +30,10 @@ static size_t bufsize;
 static unsigned char* mallocbuf;
 
 /* libmpeg2 allocator */
-static off_t mpeg2_mem_ptr NOCACHEBSS_ATTR;
-static size_t mpeg2_bufsize NOCACHEBSS_ATTR;
-static unsigned char *mpeg2_mallocbuf NOCACHEBSS_ATTR;
-static unsigned char *mpeg2_bufallocbuf NOCACHEBSS_ATTR;
+static off_t mpeg2_mem_ptr SHAREDBSS_ATTR;
+static size_t mpeg2_bufsize SHAREDBSS_ATTR;
+static unsigned char *mpeg2_mallocbuf SHAREDBSS_ATTR;
+static unsigned char *mpeg2_bufallocbuf SHAREDBSS_ATTR;
 
 #if defined(DEBUG) || defined(SIMULATOR)
 const char * mpeg_get_reason_str(int reason)
diff --git a/apps/plugins/mpegplayer/audio_thread.c b/apps/plugins/mpegplayer/audio_thread.c
index 7d2f849a44..1fcd1424ff 100644
--- a/apps/plugins/mpegplayer/audio_thread.c
+++ b/apps/plugins/mpegplayer/audio_thread.c
@@ -44,8 +44,8 @@ static size_t audio_stack_size; /* Keep gcc happy and init */
 #ifndef SIMULATOR
 static uint32_t codec_stack_copy[AUDIO_STACKSIZE / sizeof(uint32_t)];
 #endif
-static struct event_queue audio_str_queue NOCACHEBSS_ATTR;
-static struct queue_sender_list audio_str_queue_send NOCACHEBSS_ATTR;
+static struct event_queue audio_str_queue SHAREDBSS_ATTR;
+static struct queue_sender_list audio_str_queue_send SHAREDBSS_ATTR;
 struct stream audio_str IBSS_ATTR;
 
 /* libmad related definitions */
diff --git a/apps/plugins/mpegplayer/disk_buf.c b/apps/plugins/mpegplayer/disk_buf.c
index 289918fc63..46a060221d 100644
--- a/apps/plugins/mpegplayer/disk_buf.c
+++ b/apps/plugins/mpegplayer/disk_buf.c
@@ -21,12 +21,12 @@
 #include "plugin.h"
 #include "mpegplayer.h"
 
-static struct mutex disk_buf_mtx NOCACHEBSS_ATTR;
-static struct event_queue disk_buf_queue NOCACHEBSS_ATTR;
-static struct queue_sender_list disk_buf_queue_send NOCACHEBSS_ATTR;
+static struct mutex disk_buf_mtx SHAREDBSS_ATTR;
+static struct event_queue disk_buf_queue SHAREDBSS_ATTR;
+static struct queue_sender_list disk_buf_queue_send SHAREDBSS_ATTR;
 static uint32_t disk_buf_stack[DEFAULT_STACK_SIZE*2/sizeof(uint32_t)];
 
-struct disk_buf disk_buf NOCACHEBSS_ATTR;
+struct disk_buf disk_buf SHAREDBSS_ATTR;
 static struct list_item nf_list;
 
 static inline void disk_buf_lock(void)
@@ -566,7 +566,7 @@ static int disk_buf_probe(off_t start, size_t length,
     {
         if (disk_buf.cache[page] != tag)
         {
-            static struct dbuf_range rng NOCACHEBSS_ATTR;
+            static struct dbuf_range rng IBSS_ATTR;
             DEBUGF("disk_buf: cache miss\n");
             rng.tag_start = tag;
             rng.tag_end = tag_end;
diff --git a/apps/plugins/mpegplayer/disk_buf.h b/apps/plugins/mpegplayer/disk_buf.h
index 79c3328535..04b4675768 100644
--- a/apps/plugins/mpegplayer/disk_buf.h
+++ b/apps/plugins/mpegplayer/disk_buf.h
@@ -84,7 +84,7 @@ struct disk_buf
     bool need_seek;   /* Need to seek because a read was not contiguous */
 };
 
-extern struct disk_buf disk_buf NOCACHEBSS_ATTR;
+extern struct disk_buf disk_buf SHAREDBSS_ATTR;
 
 static inline bool disk_buf_is_data_ready(struct stream_hdr *sh,
                                           ssize_t margin)
diff --git a/apps/plugins/mpegplayer/mpeg_parser.c b/apps/plugins/mpegplayer/mpeg_parser.c
index cd54e84452..617b7fe9f9 100644
--- a/apps/plugins/mpegplayer/mpeg_parser.c
+++ b/apps/plugins/mpegplayer/mpeg_parser.c
@@ -21,7 +21,7 @@
 #include "plugin.h"
 #include "mpegplayer.h"
 
-struct stream_parser str_parser NOCACHEBSS_ATTR;
+struct stream_parser str_parser SHAREDBSS_ATTR;
 
 static void parser_init_state(void)
 {
diff --git a/apps/plugins/mpegplayer/stream_mgr.c b/apps/plugins/mpegplayer/stream_mgr.c
index 778ed0df83..24e820b0af 100644
--- a/apps/plugins/mpegplayer/stream_mgr.c
+++ b/apps/plugins/mpegplayer/stream_mgr.c
@@ -27,11 +27,11 @@
 GREY_INFO_STRUCT_IRAM
 #endif
 
-static struct event_queue stream_mgr_queue NOCACHEBSS_ATTR;
-static struct queue_sender_list stream_mgr_queue_send NOCACHEBSS_ATTR;
+static struct event_queue stream_mgr_queue SHAREDBSS_ATTR;
+static struct queue_sender_list stream_mgr_queue_send SHAREDBSS_ATTR;
 static uint32_t stream_mgr_thread_stack[DEFAULT_STACK_SIZE*2/sizeof(uint32_t)];
 
-struct stream_mgr stream_mgr NOCACHEBSS_ATTR;
+struct stream_mgr stream_mgr SHAREDBSS_ATTR;
 
 /* Forward decs */
 static int stream_on_close(void);
diff --git a/apps/plugins/mpegplayer/stream_mgr.h b/apps/plugins/mpegplayer/stream_mgr.h
index 339af17182..f577e5c2ce 100644
--- a/apps/plugins/mpegplayer/stream_mgr.h
+++ b/apps/plugins/mpegplayer/stream_mgr.h
@@ -44,7 +44,7 @@ struct stream_mgr
     } parms;
 };
 
-extern struct stream_mgr stream_mgr NOCACHEBSS_ATTR;
+extern struct stream_mgr stream_mgr SHAREDBSS_ATTR;
 
 struct stream_window
 {
diff --git a/apps/plugins/mpegplayer/video_out_rockbox.c b/apps/plugins/mpegplayer/video_out_rockbox.c
index c8245cc1bf..547768887a 100644
--- a/apps/plugins/mpegplayer/video_out_rockbox.c
+++ b/apps/plugins/mpegplayer/video_out_rockbox.c
@@ -52,7 +52,7 @@ static struct vo_data vo;
 #endif
 
 #if NUM_CORES > 1
-static struct mutex vo_mtx NOCACHEBSS_ATTR;
+static struct mutex vo_mtx SHAREDBSS_ATTR;
 #endif
 
 static inline void video_lock_init(void)
diff --git a/apps/plugins/mpegplayer/video_thread.c b/apps/plugins/mpegplayer/video_thread.c
index d16eb771b0..6e7c9aea15 100644
--- a/apps/plugins/mpegplayer/video_thread.c
+++ b/apps/plugins/mpegplayer/video_thread.c
@@ -54,8 +54,8 @@ struct video_thread_data
    so maybe we can reduce it. */
 #define VIDEO_STACKSIZE (4*1024)
 static uint32_t video_stack[VIDEO_STACKSIZE / sizeof(uint32_t)] IBSS_ATTR;
-static struct event_queue video_str_queue NOCACHEBSS_ATTR;
-static struct queue_sender_list video_str_queue_send NOCACHEBSS_ATTR;
+static struct event_queue video_str_queue SHAREDBSS_ATTR;
+static struct queue_sender_list video_str_queue_send SHAREDBSS_ATTR;
 struct stream video_str IBSS_ATTR;
 
 static void draw_fps(struct video_thread_data *td)
diff --git a/apps/plugins/plugin.lds b/apps/plugins/plugin.lds
index 9659412730..8699ca1c25 100644
--- a/apps/plugins/plugin.lds
+++ b/apps/plugins/plugin.lds
@@ -16,6 +16,20 @@ OUTPUT_FORMAT(elf32-sh)
 #define STUBOFFSET 0
 #endif
 
+#if defined(CPU_PP)
+#ifdef CPU_PP502x
+#define NOCACHE_BASE 	0x10000000
+#else
+#define NOCACHE_BASE 	0x28000000
+#endif /* CPU_* */
+#define CACHEALIGN_SIZE 16
+#endif /* CPU_PP */
+
+#ifndef NOCACHE_BASE
+/* Default to no offset if target doesn't define this */
+#define NOCACHE_BASE 0x00000000
+#endif
+
 #if CONFIG_CPU==S3C2440
 #include "s3c2440.h"
 #define DRAMSIZE (MEMORYSIZE * 0x100000) - 0x100 - PLUGIN_BUFFER_SIZE - STUBOFFSET - CODEC_SIZE - LCD_BUFFER_SIZE - TTB_SIZE
@@ -119,10 +133,20 @@ SECTIONS
     .data :
     {
         *(.data*)
+    } > PLUGIN_RAM
+
+#if NOCACHE_BASE != 0
+    .ncdata . + NOCACHE_BASE :
+    {
+        . = ALIGN(CACHEALIGN_SIZE);
+        *(.ncdata*)
+        . = ALIGN(CACHEALIGN_SIZE);
+    } AT> PLUGIN_RAM
+#endif
+
 #if defined(IRAMSIZE)
-        iramcopy = .;
+    iramcopy = . - NOCACHE_BASE;
 #endif
-    } > PLUGIN_RAM
 
     /DISCARD/ :
     {
@@ -139,6 +163,7 @@ SECTIONS
         iramend = .;
     } > PLUGIN_IRAM
 
+
     .ibss (NOLOAD) :
     {
         iedata = .;
@@ -150,13 +175,27 @@ SECTIONS
 
     .bss (NOLOAD) :
     {
-    plugin_bss_start = .;
+    	plugin_bss_start = .;
         *(.bss*)
         *(COMMON)
         . = ALIGN(0x4);
+    } > PLUGIN_RAM
+    
+#if NOCACHE_BASE != 0
+    .ncbss . + NOCACHE_BASE (NOLOAD) :
+    {
+    	. = ALIGN(CACHEALIGN_SIZE);
+    	*(.ncbss*)
+        . = ALIGN(CACHEALIGN_SIZE);
+    } AT> PLUGIN_RAM
+#endif
+
+    /* Restore . */
+    .pluginend . - NOCACHE_BASE :
+    {
         _plugin_end_addr = .;
         plugin_end_addr = .;
-    } > PLUGIN_RAM
+    }
 
     /* Special trick to avoid a linker error when no other sections are
        left after garbage collection (plugin not for this platform) */
diff --git a/apps/voice_thread.c b/apps/voice_thread.c
index 0da441191f..c59089d672 100644
--- a/apps/voice_thread.c
+++ b/apps/voice_thread.c
@@ -57,10 +57,10 @@ static long voice_stack[0x7c0/sizeof(long)] IBSS_ATTR_VOICE_STACK;
 static const char voice_thread_name[] = "voice";
 
 /* Voice thread synchronization objects */
-static struct event_queue voice_queue NOCACHEBSS_ATTR;
-static struct mutex voice_mutex NOCACHEBSS_ATTR;
-static struct event voice_event NOCACHEBSS_ATTR;
-static struct queue_sender_list voice_queue_sender_list NOCACHEBSS_ATTR;
+static struct event_queue voice_queue SHAREDBSS_ATTR;
+static struct mutex voice_mutex SHAREDBSS_ATTR;
+static struct event voice_event SHAREDBSS_ATTR;
+static struct queue_sender_list voice_queue_sender_list SHAREDBSS_ATTR;
 
 /* Buffer for decoded samples */
 static spx_int16_t voice_output_buf[VOICE_FRAME_SIZE] CACHEALIGN_ATTR;
@@ -115,7 +115,7 @@ void mp3_play_data(const unsigned char* start, int size,
 {
     /* Shared struct to get data to the thread - once it replies, it has
      * safely cached it in its own private data */
-    static struct voice_info voice_clip NOCACHEBSS_ATTR;
+    static struct voice_info voice_clip SHAREDBSS_ATTR;
 
     if (get_more != NULL && start != NULL && (ssize_t)size > 0)
     {
diff --git a/firmware/drivers/ata.c b/firmware/drivers/ata.c
index 681160cf01..57164c4749 100644
--- a/firmware/drivers/ata.c
+++ b/firmware/drivers/ata.c
@@ -134,7 +134,7 @@ static void ata_lock_unlock(struct ata_lock *l)
 #define mutex_unlock    ata_lock_unlock
 #endif /* MAX_PHYS_SECTOR_SIZE */
 
-static struct mutex ata_mtx NOCACHEBSS_ATTR;
+static struct mutex ata_mtx SHAREDBSS_ATTR;
 int ata_device; /* device 0 (master) or 1 (slave) */
 
 int ata_spinup_time = 0;
diff --git a/firmware/drivers/fat.c b/firmware/drivers/fat.c
index a538b92695..002e100405 100644
--- a/firmware/drivers/fat.c
+++ b/firmware/drivers/fat.c
@@ -201,7 +201,7 @@ struct fat_cache_entry
 
 static char fat_cache_sectors[FAT_CACHE_SIZE][SECTOR_SIZE];
 static struct fat_cache_entry fat_cache[FAT_CACHE_SIZE];
-static struct mutex cache_mutex NOCACHEBSS_ATTR;
+static struct mutex cache_mutex SHAREDBSS_ATTR;
 
 #if defined(HAVE_HOTSWAP) && !defined(HAVE_MMC) /* A better condition ?? */
 void fat_lock(void)
diff --git a/firmware/export/config.h b/firmware/export/config.h
index cd98fc9dca..a93152b5e7 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -457,25 +457,30 @@
                              and not a special semaphore instruction */
 #define CORELOCK_SWAP   2 /* A swap (exchange) instruction */
 
-/* Dual core support - not yet working on the 1G/2G and 3G iPod */
 #if defined(CPU_PP)
 #define IDLE_STACK_SIZE  0x80
 #define IDLE_STACK_WORDS 0x20
 
+/* Attributes to place data in uncached DRAM */
+/* These are useful beyond dual-core and ultimately beyond PP since they may
+ * be used for DMA buffers and such without cache maintenence calls. */
+#define NOCACHEBSS_ATTR     __attribute__((section(".ncbss"),nocommon))
+#define NOCACHEDATA_ATTR    __attribute__((section(".ncdata"),nocommon))
+
 #if !defined(FORCE_SINGLE_CORE)
 
 #define NUM_CORES 2
 #define CURRENT_CORE current_core()
-/* Use IRAM for variables shared across cores - large memory buffers should
- * use UNCACHED_ADDR(a) and be appropriately aligned and padded */
-#define NOCACHEBSS_ATTR IBSS_ATTR
-#define NOCACHEDATA_ATTR IDATA_ATTR
+/* Attributes for core-shared data in DRAM where IRAM is better used for other
+ * purposes. */
+#define SHAREDBSS_ATTR     NOCACHEBSS_ATTR
+#define SHAREDDATA_ATTR    NOCACHEDATA_ATTR
 
 #define IF_COP(...)         __VA_ARGS__
 #define IF_COP_VOID(...)    __VA_ARGS__
 #define IF_COP_CORE(core)   core
 
-#if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5002
+#ifdef CPU_PP
 #define CONFIG_CORELOCK SW_CORELOCK /* SWP(B) is broken */
 #else
 #define CONFIG_CORELOCK CORELOCK_SWAP
@@ -500,9 +505,10 @@
 #ifndef NUM_CORES
 /* Default to single core */
 #define NUM_CORES 1
-#define CURRENT_CORE CPU
-#define NOCACHEBSS_ATTR
-#define NOCACHEDATA_ATTR
+#define CURRENT_CORE    CPU
+/* Attributes for core-shared data in DRAM - no caching considerations */
+#define SHAREDBSS_ATTR
+#define SHAREDDATA_ATTR
 #define CONFIG_CORELOCK CORELOCK_NONE
 
 #define IF_COP(...)
diff --git a/firmware/kernel.c b/firmware/kernel.c
index 1882855985..8ee553e121 100644
--- a/firmware/kernel.c
+++ b/firmware/kernel.c
@@ -49,7 +49,7 @@
 #endif
 
 #if !defined(CPU_PP) || !defined(BOOTLOADER) 
-volatile long current_tick NOCACHEDATA_ATTR = 0;
+volatile long current_tick SHAREDDATA_ATTR = 0;
 #endif
 
 void (*tick_funcs[MAX_NUM_TICK_TASKS])(void);
@@ -62,7 +62,7 @@ static struct
     int count;
     struct event_queue *queues[MAX_NUM_QUEUES];
     IF_COP( struct corelock cl; )
-} all_queues NOCACHEBSS_ATTR;
+} all_queues SHAREDBSS_ATTR;
 
 /****************************************************************************
  * Standard kernel stuff
diff --git a/firmware/pcm.c b/firmware/pcm.c
index 9f354f1e40..a4e107ad4d 100644
--- a/firmware/pcm.c
+++ b/firmware/pcm.c
@@ -67,13 +67,13 @@
 
 /* the registered callback function to ask for more mp3 data */
 volatile pcm_more_callback_type pcm_callback_for_more
-    NOCACHEBSS_ATTR = NULL;
+    SHAREDBSS_ATTR = NULL;
 /* PCM playback state */
-volatile bool pcm_playing NOCACHEBSS_ATTR = false;
+volatile bool pcm_playing SHAREDBSS_ATTR = false;
 /* PCM paused state. paused implies playing */
-volatile bool pcm_paused NOCACHEBSS_ATTR = false;
+volatile bool pcm_paused SHAREDBSS_ATTR = false;
 /* samplerate of currently playing audio - undefined if stopped */
-unsigned long pcm_curr_sampr NOCACHEBSS_ATTR = 0;
+unsigned long pcm_curr_sampr SHAREDBSS_ATTR = 0;
 
 /**
  * Do peak calculation using distance squared from axis and save a lot
@@ -312,12 +312,12 @@ void pcm_mute(bool mute)
 /** Low level pcm recording apis **/
 
 /* Next start for recording peaks */
-const volatile void *pcm_rec_peak_addr NOCACHEBSS_ATTR = NULL;
+const volatile void *pcm_rec_peak_addr SHAREDBSS_ATTR = NULL;
 /* the registered callback function for when more data is available */
 volatile pcm_more_callback_type2
-    pcm_callback_more_ready NOCACHEBSS_ATTR = NULL;
+    pcm_callback_more_ready SHAREDBSS_ATTR = NULL;
 /* DMA transfer in is currently active */
-volatile bool pcm_recording NOCACHEBSS_ATTR = false;
+volatile bool pcm_recording SHAREDBSS_ATTR = false;
 
 /**
  * Return recording peaks - From the end of the last peak up to
diff --git a/firmware/pcm_record.c b/firmware/pcm_record.c
index 49da257c08..6e65e678a3 100644
--- a/firmware/pcm_record.c
+++ b/firmware/pcm_record.c
@@ -212,8 +212,8 @@ enum
 
 /***************************************************************************/
 
-static struct event_queue       pcmrec_queue NOCACHEBSS_ATTR;
-static struct queue_sender_list pcmrec_queue_send NOCACHEBSS_ATTR;
+static struct event_queue       pcmrec_queue SHAREDBSS_ATTR;
+static struct queue_sender_list pcmrec_queue_send SHAREDBSS_ATTR;
 static long                pcmrec_stack[3*DEFAULT_STACK_SIZE/sizeof(long)];
 static const char          pcmrec_thread_name[] = "pcmrec";
 static struct thread_entry *pcmrec_thread_p;
diff --git a/firmware/system.c b/firmware/system.c
index 65478e724b..15eb77eada 100644
--- a/firmware/system.c
+++ b/firmware/system.c
@@ -29,14 +29,14 @@
 #include "string.h"
 
 #ifndef SIMULATOR
-long cpu_frequency NOCACHEBSS_ATTR = CPU_FREQ;
+long cpu_frequency SHAREDBSS_ATTR = CPU_FREQ;
 #endif
 
 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
-static int boost_counter NOCACHEBSS_ATTR = 0;
-static bool cpu_idle NOCACHEBSS_ATTR = false;
+static int boost_counter SHAREDBSS_ATTR = 0;
+static bool cpu_idle SHAREDBSS_ATTR = false;
 #if NUM_CORES > 1
-struct spinlock boostctrl_spin NOCACHEBSS_ATTR;
+struct spinlock boostctrl_spin SHAREDBSS_ATTR;
 void cpu_boost_init(void)
 {
     spinlock_init(&boostctrl_spin);
diff --git a/firmware/target/arm/i2c-pp.c b/firmware/target/arm/i2c-pp.c
index 450effc32d..40eb80cfe1 100644
--- a/firmware/target/arm/i2c-pp.c
+++ b/firmware/target/arm/i2c-pp.c
@@ -33,7 +33,7 @@
 #include "as3514.h"
 
 /* Local functions definitions */
-static struct mutex i2c_mtx NOCACHEBSS_ATTR;
+static struct mutex i2c_mtx SHAREDBSS_ATTR;
 
 #define POLL_TIMEOUT (HZ)
 
diff --git a/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c b/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c
index f80412023d..564eb2e642 100644
--- a/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c
+++ b/firmware/target/arm/ipod/1g2g/adc-ipod-1g2g.c
@@ -22,7 +22,7 @@
 #include "hwcompat.h"
 #include "kernel.h"
 
-static struct mutex adc_mtx NOCACHEBSS_ATTR;
+static struct mutex adc_mtx SHAREDBSS_ATTR;
 
 /* used in the 2nd gen ADC interrupt */
 static unsigned int_data;
diff --git a/firmware/target/arm/ipod/app.lds b/firmware/target/arm/ipod/app.lds
index 765a5f0389..54af494d72 100644
--- a/firmware/target/arm/ipod/app.lds
+++ b/firmware/target/arm/ipod/app.lds
@@ -21,6 +21,14 @@ INPUT(target/arm/crt0-pp.o)
 #define IRAMORIG 0x40000000
 #define IRAMSIZE 0xc000
 
+#ifdef CPU_PP502x
+#define NOCACHE_BASE 	0x10000000
+#else
+#define NOCACHE_BASE 	0x28000000
+#endif
+
+#define CACHEALIGN_SIZE 16
+
 /* End of the audio buffer, where the codec buffer starts */
 #define ENDAUDIOADDR  (DRAMORIG + DRAMSIZE)
 
@@ -70,6 +78,18 @@ SECTIONS
         _dataend  = .;
     } > DRAM
 
+#if NOCACHE_BASE != 0
+    /* .ncdata section is placed at uncached physical alias address and is
+     * loaded at the proper cached virtual address - no copying is
+     * performed in the init code */
+    .ncdata . + NOCACHE_BASE :
+    {
+        . = ALIGN(CACHEALIGN_SIZE);
+        *(.ncdata*)
+        . = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+    
     /DISCARD/ :
     {
         *(.eh_frame)
@@ -103,7 +123,7 @@ SECTIONS
         _iend = .;
     } > IRAM
 
-    .idle_stacks :
+    .idle_stacks (NOLOAD) :
     {
        *(.idle_stacks)
 #if NUM_CORES > 1
@@ -116,7 +136,7 @@ SECTIONS
        cop_idlestackend = .;
     } > IRAM
 
-    .stack :
+    .stack (NOLOAD) :
     {
        *(.stack)
        stackbegin = .;
@@ -124,37 +144,53 @@ SECTIONS
        stackend = .;
     } > IRAM
 
-    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.iram) + SIZEOF(.vectors):
+    /* .bss and .ncbss are treated as a single section to use one init loop to
+     * zero it - note "_edata" and "_end" */
+    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.ncdata) +\
+         SIZEOF(.iram) + SIZEOF(.vectors) (NOLOAD) :
     {
        _edata = .;
         *(.bss*)
         *(COMMON)
         . = ALIGN(0x4);
-       _end = .;
     } > DRAM
 
-    .audiobuf ALIGN(4) :
+#if NOCACHE_BASE != 0
+    .ncbss . + NOCACHE_BASE (NOLOAD):
+    {
+    	. = ALIGN(CACHEALIGN_SIZE);
+        *(.ncbss*)
+    	. = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+
+    /* This will be aligned by preceding alignments */
+    .endaddr . - NOCACHE_BASE (NOLOAD) :
+    {
+        _end = .;
+    } > DRAM
+
+    .audiobuf (NOLOAD) :
     {
         _audiobuffer = .;
         audiobuffer = .;
     } > DRAM
-
-    .audiobufend ENDAUDIOADDR:
+    
+    .audiobufend ENDAUDIOADDR (NOLOAD) :
     {
         audiobufend = .;
         _audiobufend = .;
     } > DRAM
 
-    .codec ENDAUDIOADDR:
+    .codec ENDAUDIOADDR (NOLOAD) :
     {
         codecbuf = .;
         _codecbuf = .;
     }
 
-    .plugin ENDADDR:
+    .plugin ENDADDR (NOLOAD) :
     {
         _pluginbuf = .;
         pluginbuf = .;
     }
 }
-
diff --git a/firmware/target/arm/ipod/boot.lds b/firmware/target/arm/ipod/boot.lds
index 2f2f4f91a1..1f9c65d31c 100644
--- a/firmware/target/arm/ipod/boot.lds
+++ b/firmware/target/arm/ipod/boot.lds
@@ -43,6 +43,7 @@ SECTIONS
     *(.irodata)
     *(.idata)
     *(.data*)
+    *(.ncdata*);
     _dataend = . ;
    }
 
@@ -64,6 +65,7 @@ SECTIONS
      _edata = .;
      *(.bss*);
      *(.ibss);
+     *(.ncbss*);
      _end = .;
    }
 }
diff --git a/firmware/target/arm/iriver/app.lds b/firmware/target/arm/iriver/app.lds
index 765a5f0389..54af494d72 100644
--- a/firmware/target/arm/iriver/app.lds
+++ b/firmware/target/arm/iriver/app.lds
@@ -21,6 +21,14 @@ INPUT(target/arm/crt0-pp.o)
 #define IRAMORIG 0x40000000
 #define IRAMSIZE 0xc000
 
+#ifdef CPU_PP502x
+#define NOCACHE_BASE 	0x10000000
+#else
+#define NOCACHE_BASE 	0x28000000
+#endif
+
+#define CACHEALIGN_SIZE 16
+
 /* End of the audio buffer, where the codec buffer starts */
 #define ENDAUDIOADDR  (DRAMORIG + DRAMSIZE)
 
@@ -70,6 +78,18 @@ SECTIONS
         _dataend  = .;
     } > DRAM
 
+#if NOCACHE_BASE != 0
+    /* .ncdata section is placed at uncached physical alias address and is
+     * loaded at the proper cached virtual address - no copying is
+     * performed in the init code */
+    .ncdata . + NOCACHE_BASE :
+    {
+        . = ALIGN(CACHEALIGN_SIZE);
+        *(.ncdata*)
+        . = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+    
     /DISCARD/ :
     {
         *(.eh_frame)
@@ -103,7 +123,7 @@ SECTIONS
         _iend = .;
     } > IRAM
 
-    .idle_stacks :
+    .idle_stacks (NOLOAD) :
     {
        *(.idle_stacks)
 #if NUM_CORES > 1
@@ -116,7 +136,7 @@ SECTIONS
        cop_idlestackend = .;
     } > IRAM
 
-    .stack :
+    .stack (NOLOAD) :
     {
        *(.stack)
        stackbegin = .;
@@ -124,37 +144,53 @@ SECTIONS
        stackend = .;
     } > IRAM
 
-    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.iram) + SIZEOF(.vectors):
+    /* .bss and .ncbss are treated as a single section to use one init loop to
+     * zero it - note "_edata" and "_end" */
+    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.ncdata) +\
+         SIZEOF(.iram) + SIZEOF(.vectors) (NOLOAD) :
     {
        _edata = .;
         *(.bss*)
         *(COMMON)
         . = ALIGN(0x4);
-       _end = .;
     } > DRAM
 
-    .audiobuf ALIGN(4) :
+#if NOCACHE_BASE != 0
+    .ncbss . + NOCACHE_BASE (NOLOAD):
+    {
+    	. = ALIGN(CACHEALIGN_SIZE);
+        *(.ncbss*)
+    	. = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+
+    /* This will be aligned by preceding alignments */
+    .endaddr . - NOCACHE_BASE (NOLOAD) :
+    {
+        _end = .;
+    } > DRAM
+
+    .audiobuf (NOLOAD) :
     {
         _audiobuffer = .;
         audiobuffer = .;
     } > DRAM
-
-    .audiobufend ENDAUDIOADDR:
+    
+    .audiobufend ENDAUDIOADDR (NOLOAD) :
     {
         audiobufend = .;
         _audiobufend = .;
     } > DRAM
 
-    .codec ENDAUDIOADDR:
+    .codec ENDAUDIOADDR (NOLOAD) :
     {
         codecbuf = .;
         _codecbuf = .;
     }
 
-    .plugin ENDADDR:
+    .plugin ENDADDR (NOLOAD) :
     {
         _pluginbuf = .;
         pluginbuf = .;
     }
 }
-
diff --git a/firmware/target/arm/iriver/boot.lds b/firmware/target/arm/iriver/boot.lds
index 5fbe999333..971ec6627b 100644
--- a/firmware/target/arm/iriver/boot.lds
+++ b/firmware/target/arm/iriver/boot.lds
@@ -27,6 +27,7 @@ SECTIONS
     *(.irodata)
     *(.idata)
     *(.data*)
+    *(.ncdata*);
     _dataend = . ;
    }
 
@@ -48,6 +49,7 @@ SECTIONS
      _edata = .;
      *(.bss*);
      *(.ibss);
+     *(.ncbss*);
      _end = .;
    }
 }
diff --git a/firmware/target/arm/iriver/h10/lcd-h10_20gb.c b/firmware/target/arm/iriver/h10/lcd-h10_20gb.c
index 1c4116d2e7..1ee43c390f 100644
--- a/firmware/target/arm/iriver/h10/lcd-h10_20gb.c
+++ b/firmware/target/arm/iriver/h10/lcd-h10_20gb.c
@@ -34,7 +34,7 @@ static unsigned short disp_control_rev;
 /* Contrast setting << 8 */
 static int lcd_contrast;
 
-static unsigned lcd_yuv_options NOCACHEBSS_ATTR = 0;
+static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
 
 /* Forward declarations */
 static void lcd_display_off(void);
diff --git a/firmware/target/arm/olympus/app.lds b/firmware/target/arm/olympus/app.lds
index 765a5f0389..54af494d72 100644
--- a/firmware/target/arm/olympus/app.lds
+++ b/firmware/target/arm/olympus/app.lds
@@ -21,6 +21,14 @@ INPUT(target/arm/crt0-pp.o)
 #define IRAMORIG 0x40000000
 #define IRAMSIZE 0xc000
 
+#ifdef CPU_PP502x
+#define NOCACHE_BASE 	0x10000000
+#else
+#define NOCACHE_BASE 	0x28000000
+#endif
+
+#define CACHEALIGN_SIZE 16
+
 /* End of the audio buffer, where the codec buffer starts */
 #define ENDAUDIOADDR  (DRAMORIG + DRAMSIZE)
 
@@ -70,6 +78,18 @@ SECTIONS
         _dataend  = .;
     } > DRAM
 
+#if NOCACHE_BASE != 0
+    /* .ncdata section is placed at uncached physical alias address and is
+     * loaded at the proper cached virtual address - no copying is
+     * performed in the init code */
+    .ncdata . + NOCACHE_BASE :
+    {
+        . = ALIGN(CACHEALIGN_SIZE);
+        *(.ncdata*)
+        . = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+    
     /DISCARD/ :
     {
         *(.eh_frame)
@@ -103,7 +123,7 @@ SECTIONS
         _iend = .;
     } > IRAM
 
-    .idle_stacks :
+    .idle_stacks (NOLOAD) :
     {
        *(.idle_stacks)
 #if NUM_CORES > 1
@@ -116,7 +136,7 @@ SECTIONS
        cop_idlestackend = .;
     } > IRAM
 
-    .stack :
+    .stack (NOLOAD) :
     {
        *(.stack)
        stackbegin = .;
@@ -124,37 +144,53 @@ SECTIONS
        stackend = .;
     } > IRAM
 
-    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.iram) + SIZEOF(.vectors):
+    /* .bss and .ncbss are treated as a single section to use one init loop to
+     * zero it - note "_edata" and "_end" */
+    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.ncdata) +\
+         SIZEOF(.iram) + SIZEOF(.vectors) (NOLOAD) :
     {
        _edata = .;
         *(.bss*)
         *(COMMON)
         . = ALIGN(0x4);
-       _end = .;
     } > DRAM
 
-    .audiobuf ALIGN(4) :
+#if NOCACHE_BASE != 0
+    .ncbss . + NOCACHE_BASE (NOLOAD):
+    {
+    	. = ALIGN(CACHEALIGN_SIZE);
+        *(.ncbss*)
+    	. = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+
+    /* This will be aligned by preceding alignments */
+    .endaddr . - NOCACHE_BASE (NOLOAD) :
+    {
+        _end = .;
+    } > DRAM
+
+    .audiobuf (NOLOAD) :
     {
         _audiobuffer = .;
         audiobuffer = .;
     } > DRAM
-
-    .audiobufend ENDAUDIOADDR:
+    
+    .audiobufend ENDAUDIOADDR (NOLOAD) :
     {
         audiobufend = .;
         _audiobufend = .;
     } > DRAM
 
-    .codec ENDAUDIOADDR:
+    .codec ENDAUDIOADDR (NOLOAD) :
     {
         codecbuf = .;
         _codecbuf = .;
     }
 
-    .plugin ENDADDR:
+    .plugin ENDADDR (NOLOAD) :
     {
         _pluginbuf = .;
         pluginbuf = .;
     }
 }
-
diff --git a/firmware/target/arm/olympus/boot.lds b/firmware/target/arm/olympus/boot.lds
index 5fbe999333..2c0245072c 100644
--- a/firmware/target/arm/olympus/boot.lds
+++ b/firmware/target/arm/olympus/boot.lds
@@ -27,6 +27,7 @@ SECTIONS
     *(.irodata)
     *(.idata)
     *(.data*)
+    *(.ncdata*)
     _dataend = . ;
    }
 
@@ -48,6 +49,7 @@ SECTIONS
      _edata = .;
      *(.bss*);
      *(.ibss);
+     *(.ncbss*);
      _end = .;
    }
 }
diff --git a/firmware/target/arm/pcm-pp.c b/firmware/target/arm/pcm-pp.c
index 433e6e1e4f..64c6d0cdc8 100644
--- a/firmware/target/arm/pcm-pp.c
+++ b/firmware/target/arm/pcm-pp.c
@@ -72,7 +72,7 @@ void fiq_handler(void)
 /****************************************************************************
  ** Playback DMA transfer
  **/
-struct dma_data dma_play_data NOCACHEBSS_ATTR =
+struct dma_data dma_play_data SHAREDBSS_ATTR =
 {
     /* Initialize to a locked, stopped state */
     .p = NULL,
@@ -84,7 +84,7 @@ struct dma_data dma_play_data NOCACHEBSS_ATTR =
     .state = 0
 };
 
-static unsigned long pcm_freq NOCACHEDATA_ATTR = HW_SAMPR_DEFAULT; /* 44.1 is default */
+static unsigned long pcm_freq SHAREDDATA_ATTR = HW_SAMPR_DEFAULT; /* 44.1 is default */
 #ifdef HAVE_WM8751
 /* Samplerate control for audio codec */
 static int sr_ctrl = MROBE100_44100HZ;
@@ -356,7 +356,7 @@ const void * pcm_play_dma_get_peak_buffer(int *count)
  **/
 #ifdef HAVE_RECORDING
 /* PCM recording interrupt routine lockout */
-static struct dma_data dma_rec_data NOCACHEBSS_ATTR =
+static struct dma_data dma_rec_data SHAREDBSS_ATTR =
 {
     /* Initialize to a locked, stopped state */
     .p = NULL,
diff --git a/firmware/target/arm/sandisk/app.lds b/firmware/target/arm/sandisk/app.lds
index 765a5f0389..54af494d72 100644
--- a/firmware/target/arm/sandisk/app.lds
+++ b/firmware/target/arm/sandisk/app.lds
@@ -21,6 +21,14 @@ INPUT(target/arm/crt0-pp.o)
 #define IRAMORIG 0x40000000
 #define IRAMSIZE 0xc000
 
+#ifdef CPU_PP502x
+#define NOCACHE_BASE 	0x10000000
+#else
+#define NOCACHE_BASE 	0x28000000
+#endif
+
+#define CACHEALIGN_SIZE 16
+
 /* End of the audio buffer, where the codec buffer starts */
 #define ENDAUDIOADDR  (DRAMORIG + DRAMSIZE)
 
@@ -70,6 +78,18 @@ SECTIONS
         _dataend  = .;
     } > DRAM
 
+#if NOCACHE_BASE != 0
+    /* .ncdata section is placed at uncached physical alias address and is
+     * loaded at the proper cached virtual address - no copying is
+     * performed in the init code */
+    .ncdata . + NOCACHE_BASE :
+    {
+        . = ALIGN(CACHEALIGN_SIZE);
+        *(.ncdata*)
+        . = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+    
     /DISCARD/ :
     {
         *(.eh_frame)
@@ -103,7 +123,7 @@ SECTIONS
         _iend = .;
     } > IRAM
 
-    .idle_stacks :
+    .idle_stacks (NOLOAD) :
     {
        *(.idle_stacks)
 #if NUM_CORES > 1
@@ -116,7 +136,7 @@ SECTIONS
        cop_idlestackend = .;
     } > IRAM
 
-    .stack :
+    .stack (NOLOAD) :
     {
        *(.stack)
        stackbegin = .;
@@ -124,37 +144,53 @@ SECTIONS
        stackend = .;
     } > IRAM
 
-    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.iram) + SIZEOF(.vectors):
+    /* .bss and .ncbss are treated as a single section to use one init loop to
+     * zero it - note "_edata" and "_end" */
+    .bss ADDR(.data) + SIZEOF(.data) + SIZEOF(.ncdata) +\
+         SIZEOF(.iram) + SIZEOF(.vectors) (NOLOAD) :
     {
        _edata = .;
         *(.bss*)
         *(COMMON)
         . = ALIGN(0x4);
-       _end = .;
     } > DRAM
 
-    .audiobuf ALIGN(4) :
+#if NOCACHE_BASE != 0
+    .ncbss . + NOCACHE_BASE (NOLOAD):
+    {
+    	. = ALIGN(CACHEALIGN_SIZE);
+        *(.ncbss*)
+    	. = ALIGN(CACHEALIGN_SIZE);
+    } AT> DRAM
+#endif
+
+    /* This will be aligned by preceding alignments */
+    .endaddr . - NOCACHE_BASE (NOLOAD) :
+    {
+        _end = .;
+    } > DRAM
+
+    .audiobuf (NOLOAD) :
     {
         _audiobuffer = .;
         audiobuffer = .;
     } > DRAM
-
-    .audiobufend ENDAUDIOADDR:
+    
+    .audiobufend ENDAUDIOADDR (NOLOAD) :
     {
         audiobufend = .;
         _audiobufend = .;
     } > DRAM
 
-    .codec ENDAUDIOADDR:
+    .codec ENDAUDIOADDR (NOLOAD) :
     {
         codecbuf = .;
         _codecbuf = .;
     }
 
-    .plugin ENDADDR:
+    .plugin ENDADDR (NOLOAD) :
     {
         _pluginbuf = .;
         pluginbuf = .;
     }
 }
-
diff --git a/firmware/target/arm/sandisk/ata-c200_e200.c b/firmware/target/arm/sandisk/ata-c200_e200.c
index 747cb17ca1..e4a5388978 100644
--- a/firmware/target/arm/sandisk/ata-c200_e200.c
+++ b/firmware/target/arm/sandisk/ata-c200_e200.c
@@ -165,7 +165,7 @@ static struct sd_card_status sd_status[NUM_VOLUMES] =
 /* Shoot for around 75% usage */
 static long sd_stack [(DEFAULT_STACK_SIZE*2 + 0x1c0)/sizeof(long)];
 static const char         sd_thread_name[] = "ata/sd";
-static struct mutex       sd_mtx NOCACHEBSS_ATTR;
+static struct mutex       sd_mtx SHAREDBSS_ATTR;
 static struct event_queue sd_queue;
 
 /* Posted when card plugged status has changed */
diff --git a/firmware/target/arm/sandisk/boot.lds b/firmware/target/arm/sandisk/boot.lds
index a087a7250d..1c1066895f 100644
--- a/firmware/target/arm/sandisk/boot.lds
+++ b/firmware/target/arm/sandisk/boot.lds
@@ -30,6 +30,7 @@ SECTIONS
     *(.irodata)
     *(.idata)
     *(.data*)
+    *(.ncdata*)
     _dataend = . ;
    }
 
@@ -51,6 +52,7 @@ SECTIONS
      _edata = .;
      *(.bss*);
      *(.ibss);
+     *(.ncbss*);
      _end = .;
    }
 }
diff --git a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
index a629739d50..a2110f7e66 100644
--- a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
+++ b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
@@ -23,7 +23,7 @@
 #include "system.h"
 
 /* Display status */
-static unsigned lcd_yuv_options NOCACHEBSS_ATTR = 0;
+static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
 
 /* LCD command set for Samsung S6B33B2 */
 
diff --git a/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c b/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
index f2689eabbf..15263b5533 100644
--- a/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
+++ b/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c
@@ -28,8 +28,8 @@
 
 /* Power and display status */
 static bool power_on   = false; /* Is the power turned on?   */
-static bool display_on NOCACHEBSS_ATTR = false; /* Is the display turned on? */
-static unsigned lcd_yuv_options NOCACHEBSS_ATTR = 0;
+static bool display_on SHAREDBSS_ATTR = false; /* Is the display turned on? */
+static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
 
 /* Reverse Flag */
 #define R_DISP_CONTROL_NORMAL 0x0004
diff --git a/firmware/target/arm/system-target.h b/firmware/target/arm/system-target.h
index 8dcbf0f9da..2a72b524f7 100644
--- a/firmware/target/arm/system-target.h
+++ b/firmware/target/arm/system-target.h
@@ -108,7 +108,7 @@ static inline unsigned int processor_id(void)
 /* Certain data needs to be out of the way of cache line interference
  * such as data for COP use or for use with UNCACHED_ADDR */
 #define PROC_NEEDS_CACHEALIGN
-#define CACHEALIGN_BITS (5) /* 2^5 = 32 bytes */
+#define CACHEALIGN_BITS (4) /* 2^4 = 16 bytes */
 
 /** cache functions **/
 #ifndef BOOTLOADER
diff --git a/firmware/target/arm/tcc780x/ata-nand-tcc780x.c b/firmware/target/arm/tcc780x/ata-nand-tcc780x.c
index f6d1df96ce..b47444f3a8 100644
--- a/firmware/target/arm/tcc780x/ata-nand-tcc780x.c
+++ b/firmware/target/arm/tcc780x/ata-nand-tcc780x.c
@@ -42,7 +42,7 @@ static bool initialized = false;
 static long next_yield = 0;
 #define MIN_YIELD_PERIOD 2000
 
-static struct mutex ata_mtx NOCACHEBSS_ATTR;
+static struct mutex ata_mtx SHAREDBSS_ATTR;
 
 #define SECTOR_SIZE 512
 
diff --git a/firmware/thread.c b/firmware/thread.c
index e6ab0e4a71..040818f31c 100644
--- a/firmware/thread.c
+++ b/firmware/thread.c
@@ -235,7 +235,7 @@ extern uintptr_t cpu_idlestackbegin[];
 extern uintptr_t cpu_idlestackend[];
 extern uintptr_t cop_idlestackbegin[];
 extern uintptr_t cop_idlestackend[];
-static uintptr_t * const idle_stacks[NUM_CORES] NOCACHEDATA_ATTR =
+static uintptr_t * const idle_stacks[NUM_CORES] =
 {
     [CPU] = cpu_idlestackbegin,
     [COP] = cop_idlestackbegin
@@ -251,7 +251,7 @@ struct core_semaphores
     volatile uint8_t unused;       /* 03h */
 };
 
-static struct core_semaphores core_semaphores[NUM_CORES] NOCACHEBSS_ATTR;
+static struct core_semaphores core_semaphores[NUM_CORES] IBSS_ATTR;
 #endif /* CONFIG_CPU == PP5002 */
 
 #endif /* NUM_CORES */
diff --git a/firmware/timer.c b/firmware/timer.c
index 23df271220..c803048744 100644
--- a/firmware/timer.c
+++ b/firmware/timer.c
@@ -25,12 +25,12 @@
 #include "logf.h"
 
 static int timer_prio = -1;
-void NOCACHEBSS_ATTR (*pfn_timer)(void) = NULL;      /* timer callback */
-void NOCACHEBSS_ATTR (*pfn_unregister)(void) = NULL; /* unregister callback */
+void SHAREDBSS_ATTR (*pfn_timer)(void) = NULL;      /* timer callback */
+void SHAREDBSS_ATTR (*pfn_unregister)(void) = NULL; /* unregister callback */
 #ifdef CPU_COLDFIRE
 static int base_prescale;
 #elif defined CPU_PP || CONFIG_CPU == PNX0101
-static long NOCACHEBSS_ATTR cycles_new = 0;
+static long SHAREDBSS_ATTR cycles_new = 0;
 #endif
 
 /* interrupt handler */