Ingenic Jz4740: enable IRAM (only core, without ibss)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21331 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 15 insertions, 34 deletions

diff --git a/firmware/export/config.h b/firmware/export/config.h
index 696c923bb6..e53e19ac1d 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -639,13 +639,14 @@ Lyre prototype 1*/
     (CONFIG_CPU == AS3525 && MEMORYSIZE > 2) || /* AS3525 +2MB: core, plugins, codecs */ \
     (CONFIG_CPU == AS3525 && MEMORYSIZE <= 2 && !defined(PLUGIN) && !defined(CODEC)) || /* AS3525 2MB:core only */ \
     (CONFIG_CPU == PNX0101) || \
-    (CONFIG_CPU == S5L8700)) /* Samsung S5L8700: core, plugins, codecs */
+    (CONFIG_CPU == S5L8700)) /* Samsung S5L8700: core, plugins, codecs */ || \
+    (CONFIG_CPU == JZ4732 && !defined(PLUGIN) && !defined(CODEC)) /* Jz4740: core only */
 #define ICODE_ATTR      __attribute__ ((section(".icode")))
 #define ICONST_ATTR     __attribute__ ((section(".irodata")))
 #define IDATA_ATTR      __attribute__ ((section(".idata")))
 #define IBSS_ATTR       __attribute__ ((section(".ibss")))
 #define USE_IRAM
-#if CONFIG_CPU != SH7034 && (CONFIG_CPU != AS3525 || MEMORYSIZE > 2)
+#if CONFIG_CPU != SH7034 && (CONFIG_CPU != AS3525 || MEMORYSIZE > 2) && CONFIG_CPU != JZ4732
 #define PLUGIN_USE_IRAM
 #endif
 #if defined(CPU_ARM)
diff --git a/firmware/target/mips/ingenic_jz47xx/app.lds b/firmware/target/mips/ingenic_jz47xx/app.lds
index 61bfd2e613..e8c9ebf65b 100644
--- a/firmware/target/mips/ingenic_jz47xx/app.lds
+++ b/firmware/target/mips/ingenic_jz47xx/app.lds
@@ -16,7 +16,7 @@ STARTUP(target/mips/ingenic_jz47xx/crt0.o)
 
 #define DRAMORIG      0x80004000
 #define IRAMORIG      0x80000000
-#define IRAMSIZE      (16K-0x220)
+#define IRAMSIZE      16K
 
 /* End of the audio buffer, where the codec buffer starts */
 #define ENDAUDIOADDR  (DRAMORIG + DRAMSIZE)
@@ -41,14 +41,14 @@ SECTIONS
         *(.init.text);
         *(.text*);
     } > DRAM
-    
+
     . = ALIGN(4);
 
     .rodata :
     {
         *(.rodata*);
     } > DRAM
-    
+
     . = ALIGN(4);
 
     .data :
@@ -57,9 +57,9 @@ SECTIONS
         *(.sdata*);
         *(.rel.dyn);
     } > DRAM
-       
+
     . = ALIGN(4);
-    
+ 
     /* Set the load address of .iram at the same address as .bss
      * so RAM won't be wasted as .iram in the end will get copied
      * to IRAM. */
@@ -74,7 +74,7 @@ SECTIONS
         . = 0x200;
         *(.vectors.4);
         *(.vectors);
-        
+
         *(.icode);
         *(.irodata);
         *(.idata);
@@ -83,9 +83,9 @@ SECTIONS
         _iramend = .;
     } > IRAM
     _iramcopy = LOADADDR(.iram);
-    
+
     . = ALIGN(4);
-    
+
     .stack (NOLOAD):
     {
          *(.stack);
@@ -93,28 +93,20 @@ SECTIONS
          . += 0x2000;
          stackend = .;
     } > IRAM
-    
-    . = ALIGN(4);
 
     .bss (NOLOAD):
     {
          _edata = .;
          *(.sbss*);
          *(.bss*);
+         *(.ibss*); /* Don't put this in IRAM as there's not enough space */
          *(COMMON);
          *(.scommon*);
          _end = .;
     } > DRAM
-    
+
     . = ALIGN(4);
-    
-    .ibss (NOLOAD) :
-    {
-        _iedata = .;
-        *(.ibss*);
-        _iend = .;
-    } > IRAM
-    
+
     .audiobuf ALIGN(4) :
     {
         audiobuffer = .;
@@ -134,7 +126,7 @@ SECTIONS
     {
         pluginbuf = .;
     }
-    
+
     /DISCARD/ :
     {
         *(.eh_frame);
diff --git a/firmware/target/mips/ingenic_jz47xx/crt0.S b/firmware/target/mips/ingenic_jz47xx/crt0.S
index 783773cf0c..111244b173 100644
--- a/firmware/target/mips/ingenic_jz47xx/crt0.S
+++ b/firmware/target/mips/ingenic_jz47xx/crt0.S
@@ -147,18 +147,6 @@ _bss_loop:
     sw     zero, 0(t0)
     bne    t0, t1, _bss_loop
     addiu  t0, 4
-    
-    /*
-      ----------------------------------------------------
-       Clear IBSS section
-      ----------------------------------------------------
-    */
-    la     t0, _iedata
-    la     t1, _iend
-_ibss_loop:
-    sw     zero, 0(t0)
-    bne    t0, t1, _ibss_loop
-    addiu  t0, 4
 
     /*
       ----------------------------------------------------