Merge pull request #209 from sifive/arty-19.2

Make rtl target to use ram from dtim, flash from testram

14 files changed, 164 insertions, 591 deletions

diff --git a/bsp/coreip-e31-arty/metal.dhrystone.lds b/bsp/coreip-e31-arty/metal.dhrystone.lds
deleted file mode 100644
index edf8749..0000000
--- a/bsp/coreip-e31-arty/metal.dhrystone.lds
+++ /dev/null
@@ -1,221 +0,0 @@
-OUTPUT_ARCH("riscv")
-
-ENTRY(_enter)
-
-MEMORY
-{
-	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
-	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	flash (rxai!w) : ORIGIN = 0x40400000, LENGTH = 0x1fc00000
-}
-
-PHDRS
-{
-	flash PT_LOAD;
-	ram_init PT_LOAD;
-	itim_init PT_LOAD;
-	ram PT_NULL;
-	itim PT_NULL;
-}
-
-SECTIONS
-{
-	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
-	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
-
-
-	.init 		:
-	{
-		KEEP (*(.text.metal.init.enter))
-		KEEP (*(SORT_NONE(.init)))
-	} >flash AT>flash :flash
-
-
-	.text 		:
-	{
-		*(.text.unlikely .text.unlikely.*)
-		*(.text.startup .text.startup.*)
-		*(.text .text.*)
-		*(.gnu.linkonce.t.*)
-	} >flash AT>flash :flash
-
-
-	.fini 		:
-	{
-		KEEP (*(SORT_NONE(.fini)))
-	} >flash AT>flash :flash
-
-
-	PROVIDE (__etext = .);
-	PROVIDE (_etext = .);
-	PROVIDE (etext = .);
-
-
-	. = ALIGN(4);
-
-
-	.preinit_array 		:
-	{
-		PROVIDE_HIDDEN (__preinit_array_start = .);
-		KEEP (*(.preinit_array))
-		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >flash AT>flash :flash
-
-
-	.init_array 		:
-	{
-		PROVIDE_HIDDEN (__init_array_start = .);
-		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
-		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
-		PROVIDE_HIDDEN (__init_array_end = .);
-	} >flash AT>flash :flash
-
-
-	.finit_array 		:
-	{
-		PROVIDE_HIDDEN (__finit_array_start = .);
-		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
-		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
-		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >flash AT>flash :flash
-
-
-	.ctors 		:
-	{
-		/* gcc uses crtbegin.o to find the start of
-		   the constructors, so we make sure it is
-		   first.  Because this is a wildcard, it
-		   doesn't matter if the user does not
-		   actually link against crtbegin.o; the
-		   linker won't look for a file to match a
-		   wildcard.  The wildcard also means that it
-		   doesn't matter which directory crtbegin.o
-		   is in.  */
-		KEEP (*crtbegin.o(.ctors))
-		KEEP (*crtbegin?.o(.ctors))
-		/* We don't want to include the .ctor section from
-		   the crtend.o file until after the sorted ctors.
-		   The .ctor section from the crtend file contains the
-		   end of ctors marker and it must be last */
-		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
-		KEEP (*(SORT(.ctors.*)))
-		KEEP (*(.ctors))
-	} >flash AT>flash :flash
-
-
-	.dtors 		:
-	{
-		KEEP (*crtbegin.o(.dtors))
-		KEEP (*crtbegin?.o(.dtors))
-		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
-		KEEP (*(SORT(.dtors.*)))
-		KEEP (*(.dtors))
-	} >flash AT>flash :flash
-
-
-	.litimalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( metal_segment_itim_source_start = . );
-	} >flash AT>flash :flash
-
-
-	.ditimalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>flash :itim_init
-
-
-	.itim 		:
-	{
-		*(.itim .itim.*)
-	} >itim AT>flash :itim_init
-
-
-	. = ALIGN(8);
-	PROVIDE( metal_segment_itim_target_end = . );
-
-
-	.lalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( _data_lma = . );
-		PROVIDE( metal_segment_data_source_start = . );
-	} >flash AT>flash :flash
-
-
-	.dalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>flash :ram_init
-
-
-	.data 		:
-	{
-                *(.rdata)
-                *(.rodata .rodata.*)
-                *(.gnu.linkonce.r.*)
-		*(.data .data.*)
-		*(.gnu.linkonce.d.*)
-		. = ALIGN(8);
-		PROVIDE( __global_pointer$ = . + 0x800 );
-		*(.sdata .sdata.*)
-		*(.gnu.linkonce.s.*)
-		. = ALIGN(8);
-		*(.srodata.cst16)
-		*(.srodata.cst8)
-		*(.srodata.cst4)
-		*(.srodata.cst2)
-		*(.srodata .srodata.*)
-	} >ram AT>flash :ram_init
-
-
-	. = ALIGN(4);
-	PROVIDE( _edata = . );
-	PROVIDE( edata = . );
-	PROVIDE( metal_segment_data_target_end = . );
-	PROVIDE( _fbss = . );
-	PROVIDE( __bss_start = . );
-	PROVIDE( metal_segment_bss_target_start = . );
-
-
-	.bss 		:
-	{
-		*(.sbss*)
-		*(.gnu.linkonce.sb.*)
-		*(.bss .bss.*)
-		*(.gnu.linkonce.b.*)
-		*(COMMON)
-		. = ALIGN(4);
-	} >ram AT>ram :ram
-
-
-	. = ALIGN(8);
-	PROVIDE( _end = . );
-	PROVIDE( end = . );
-	PROVIDE( metal_segment_bss_target_end = . );
-
-
-	.stack :
-	{
-		PROVIDE(metal_segment_stack_begin = .);
-		. = __stack_size;
-		PROVIDE( _sp = . );
-		PROVIDE(metal_segment_stack_end = .);
-	} >ram AT>ram :ram
-
-
-	.heap :
-	{
-		PROVIDE( metal_segment_heap_target_start = . );
-		. = __heap_size;
-		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
-		PROVIDE( metal_segment_heap_target_end = . );
-		PROVIDE( _heap_end = . );
-	} >ram AT>ram :ram
-
-
-}
-
diff --git a/bsp/coreip-e31-arty/metal.flash.lds b/bsp/coreip-e31-arty/metal.flash.lds
deleted file mode 100644
index ae57468..0000000
--- a/bsp/coreip-e31-arty/metal.flash.lds
+++ /dev/null
@@ -1,226 +0,0 @@
-OUTPUT_ARCH("riscv")
-
-ENTRY(_enter)
-
-MEMORY
-{
-	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
-	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	flash (rxai!w) : ORIGIN = 0x40400000, LENGTH = 0x1fc00000
-}
-
-PHDRS
-{
-	flash PT_LOAD;
-	ram_init PT_LOAD;
-	itim_init PT_LOAD;
-	ram PT_NULL;
-	itim PT_NULL;
-}
-
-SECTIONS
-{
-	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
-	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
-
-
-	.init 		:
-	{
-		KEEP (*(.text.metal.init.enter))
-		KEEP (*(SORT_NONE(.init)))
-	} >flash AT>flash :flash
-
-
-	.text 		:
-	{
-		*(.text.unlikely .text.unlikely.*)
-		*(.text.startup .text.startup.*)
-		*(.text .text.*)
-		*(.gnu.linkonce.t.*)
-	} >flash AT>flash :flash
-
-
-	.fini 		:
-	{
-		KEEP (*(SORT_NONE(.fini)))
-	} >flash AT>flash :flash
-
-
-	PROVIDE (__etext = .);
-	PROVIDE (_etext = .);
-	PROVIDE (etext = .);
-
-
-	.rodata 		:
-	{
-		*(.rdata)
-		*(.rodata .rodata.*)
-		*(.gnu.linkonce.r.*)
-	} >flash AT>flash :flash
-
-
-	. = ALIGN(4);
-
-
-	.preinit_array 		:
-	{
-		PROVIDE_HIDDEN (__preinit_array_start = .);
-		KEEP (*(.preinit_array))
-		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >flash AT>flash :flash
-
-
-	.init_array 		:
-	{
-		PROVIDE_HIDDEN (__init_array_start = .);
-		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
-		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
-		PROVIDE_HIDDEN (__init_array_end = .);
-	} >flash AT>flash :flash
-
-
-	.finit_array 		:
-	{
-		PROVIDE_HIDDEN (__finit_array_start = .);
-		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
-		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
-		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >flash AT>flash :flash
-
-
-	.ctors 		:
-	{
-		/* gcc uses crtbegin.o to find the start of
-		   the constructors, so we make sure it is
-		   first.  Because this is a wildcard, it
-		   doesn't matter if the user does not
-		   actually link against crtbegin.o; the
-		   linker won't look for a file to match a
-		   wildcard.  The wildcard also means that it
-		   doesn't matter which directory crtbegin.o
-		   is in.  */
-		KEEP (*crtbegin.o(.ctors))
-		KEEP (*crtbegin?.o(.ctors))
-		/* We don't want to include the .ctor section from
-		   the crtend.o file until after the sorted ctors.
-		   The .ctor section from the crtend file contains the
-		   end of ctors marker and it must be last */
-		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
-		KEEP (*(SORT(.ctors.*)))
-		KEEP (*(.ctors))
-	} >flash AT>flash :flash
-
-
-	.dtors 		:
-	{
-		KEEP (*crtbegin.o(.dtors))
-		KEEP (*crtbegin?.o(.dtors))
-		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
-		KEEP (*(SORT(.dtors.*)))
-		KEEP (*(.dtors))
-	} >flash AT>flash :flash
-
-
-	.litimalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( metal_segment_itim_source_start = . );
-	} >flash AT>flash :flash
-
-
-	.ditimalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>flash :itim_init
-
-
-	.itim 		:
-	{
-		*(.itim .itim.*)
-	} >itim AT>flash :itim_init
-
-
-	. = ALIGN(8);
-	PROVIDE( metal_segment_itim_target_end = . );
-
-
-	.lalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( _data_lma = . );
-		PROVIDE( metal_segment_data_source_start = . );
-	} >flash AT>flash :flash
-
-
-	.dalign 		:
-	{
-		. = ALIGN(4);
-		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>flash :ram_init
-
-
-	.data 		:
-	{
-		*(.data .data.*)
-		*(.gnu.linkonce.d.*)
-		. = ALIGN(8);
-		PROVIDE( __global_pointer$ = . + 0x800 );
-		*(.sdata .sdata.*)
-		*(.gnu.linkonce.s.*)
-		. = ALIGN(8);
-		*(.srodata.cst16)
-		*(.srodata.cst8)
-		*(.srodata.cst4)
-		*(.srodata.cst2)
-		*(.srodata .srodata.*)
-	} >ram AT>flash :ram_init
-
-
-	. = ALIGN(4);
-	PROVIDE( _edata = . );
-	PROVIDE( edata = . );
-	PROVIDE( metal_segment_data_target_end = . );
-	PROVIDE( _fbss = . );
-	PROVIDE( __bss_start = . );
-	PROVIDE( metal_segment_bss_target_start = . );
-
-
-	.bss 		:
-	{
-		*(.sbss*)
-		*(.gnu.linkonce.sb.*)
-		*(.bss .bss.*)
-		*(.gnu.linkonce.b.*)
-		*(COMMON)
-		. = ALIGN(4);
-	} >ram AT>ram :ram
-
-
-	. = ALIGN(8);
-	PROVIDE( _end = . );
-	PROVIDE( end = . );
-	PROVIDE( metal_segment_bss_target_end = . );
-
-
-	.stack :
-	{
-		PROVIDE(metal_segment_stack_begin = .);
-		. = __stack_size;
-		PROVIDE( _sp = . );
-		PROVIDE(metal_segment_stack_end = .);
-	} >ram AT>ram :ram
-
-
-	.heap :
-	{
-		PROVIDE( metal_segment_heap_target_start = . );
-		. = __heap_size;
-		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
-		PROVIDE( metal_segment_heap_target_end = . );
-		PROVIDE( _heap_end = . );
-	} >ram AT>ram :ram
-
-
-}
-
diff --git a/bsp/coreip-e31-rtl/metal.default.lds b/bsp/coreip-e31-rtl/metal.default.lds
index 26744c6..0b495c2 100644
--- a/bsp/coreip-e31-rtl/metal.default.lds
+++ b/bsp/coreip-e31-rtl/metal.default.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x8000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x8000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.text 		:
@@ -38,13 +39,13 @@ SECTIONS
 		*(.text .text.*)
 		*(.itim .itim.*)
 		*(.gnu.linkonce.t.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -57,7 +58,7 @@ SECTIONS
 		*(.rdata)
 		*(.rodata .rodata.*)
 		*(.gnu.linkonce.r.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	. = ALIGN(4);
@@ -68,7 +69,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -77,7 +78,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -86,7 +87,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -109,7 +110,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -119,27 +120,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -151,14 +152,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -175,7 +176,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -217,6 +218,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-e31-rtl/metal.ramrodata.lds b/bsp/coreip-e31-rtl/metal.ramrodata.lds
index 1373c32..1851d65 100644
--- a/bsp/coreip-e31-rtl/metal.ramrodata.lds
+++ b/bsp/coreip-e31-rtl/metal.ramrodata.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x8000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x8000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 
@@ -36,7 +37,7 @@ SECTIONS
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -54,7 +55,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -63,7 +64,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -72,7 +73,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -95,7 +96,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -105,27 +106,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -137,7 +138,7 @@ SECTIONS
 		*(.text .text.*)
 		*(.gnu.linkonce.t.*)
 		*(.itim .itim.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.lalign 		:
@@ -145,14 +146,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -172,7 +173,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -214,6 +215,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-e31-rtl/metal.scratchpad.lds b/bsp/coreip-e31-rtl/metal.scratchpad.lds
index 26744c6..f07f9ed 100644
--- a/bsp/coreip-e31-rtl/metal.scratchpad.lds
+++ b/bsp/coreip-e31-rtl/metal.scratchpad.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x8000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x8000000
 }
 
 PHDRS
diff --git a/bsp/coreip-e34-rtl/metal.default.lds b/bsp/coreip-e34-rtl/metal.default.lds
index 26744c6..0b495c2 100644
--- a/bsp/coreip-e34-rtl/metal.default.lds
+++ b/bsp/coreip-e34-rtl/metal.default.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x8000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x8000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.text 		:
@@ -38,13 +39,13 @@ SECTIONS
 		*(.text .text.*)
 		*(.itim .itim.*)
 		*(.gnu.linkonce.t.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -57,7 +58,7 @@ SECTIONS
 		*(.rdata)
 		*(.rodata .rodata.*)
 		*(.gnu.linkonce.r.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	. = ALIGN(4);
@@ -68,7 +69,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -77,7 +78,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -86,7 +87,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -109,7 +110,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -119,27 +120,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -151,14 +152,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -175,7 +176,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -217,6 +218,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-e34-rtl/metal.ramrodata.lds b/bsp/coreip-e34-rtl/metal.ramrodata.lds
index 1373c32..1851d65 100644
--- a/bsp/coreip-e34-rtl/metal.ramrodata.lds
+++ b/bsp/coreip-e34-rtl/metal.ramrodata.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x8000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x8000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 
@@ -36,7 +37,7 @@ SECTIONS
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -54,7 +55,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -63,7 +64,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -72,7 +73,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -95,7 +96,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -105,27 +106,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -137,7 +138,7 @@ SECTIONS
 		*(.text .text.*)
 		*(.gnu.linkonce.t.*)
 		*(.itim .itim.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.lalign 		:
@@ -145,14 +146,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -172,7 +173,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -214,6 +215,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-e34-rtl/metal.scratchpad.lds b/bsp/coreip-e34-rtl/metal.scratchpad.lds
index 26744c6..f07f9ed 100644
--- a/bsp/coreip-e34-rtl/metal.scratchpad.lds
+++ b/bsp/coreip-e34-rtl/metal.scratchpad.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x8000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x8000000
 }
 
 PHDRS
diff --git a/bsp/coreip-s51-rtl/metal.default.lds b/bsp/coreip-s51-rtl/metal.default.lds
index bc7b16a..efa595f 100644
--- a/bsp/coreip-s51-rtl/metal.default.lds
+++ b/bsp/coreip-s51-rtl/metal.default.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x4000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x4000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.text 		:
@@ -38,13 +39,13 @@ SECTIONS
 		*(.text .text.*)
 		*(.itim .itim.*)
 		*(.gnu.linkonce.t.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -57,7 +58,7 @@ SECTIONS
 		*(.rdata)
 		*(.rodata .rodata.*)
 		*(.gnu.linkonce.r.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	. = ALIGN(4);
@@ -68,7 +69,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -77,7 +78,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -86,7 +87,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -109,7 +110,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -119,27 +120,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -151,14 +152,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -175,7 +176,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -217,6 +218,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-s51-rtl/metal.ramrodata.lds b/bsp/coreip-s51-rtl/metal.ramrodata.lds
index 5afbc7b..de23402 100644
--- a/bsp/coreip-s51-rtl/metal.ramrodata.lds
+++ b/bsp/coreip-s51-rtl/metal.ramrodata.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x4000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x4000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 
@@ -36,7 +37,7 @@ SECTIONS
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -54,7 +55,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -63,7 +64,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -72,7 +73,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -95,7 +96,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -105,27 +106,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -137,7 +138,7 @@ SECTIONS
 		*(.text .text.*)
 		*(.gnu.linkonce.t.*)
 		*(.itim .itim.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.lalign 		:
@@ -145,14 +146,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -172,7 +173,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -214,6 +215,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-s51-rtl/metal.scratchpad.lds b/bsp/coreip-s51-rtl/metal.scratchpad.lds
index bc7b16a..8ead4a8 100644
--- a/bsp/coreip-s51-rtl/metal.scratchpad.lds
+++ b/bsp/coreip-s51-rtl/metal.scratchpad.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x4000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x4000000
 }
 
 PHDRS
diff --git a/bsp/coreip-s54-rtl/metal.default.lds b/bsp/coreip-s54-rtl/metal.default.lds
index bc7b16a..efa595f 100644
--- a/bsp/coreip-s54-rtl/metal.default.lds
+++ b/bsp/coreip-s54-rtl/metal.default.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x4000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x4000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.text 		:
@@ -38,13 +39,13 @@ SECTIONS
 		*(.text .text.*)
 		*(.itim .itim.*)
 		*(.gnu.linkonce.t.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -57,7 +58,7 @@ SECTIONS
 		*(.rdata)
 		*(.rodata .rodata.*)
 		*(.gnu.linkonce.r.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	. = ALIGN(4);
@@ -68,7 +69,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -77,7 +78,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -86,7 +87,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -109,7 +110,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -119,27 +120,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -151,14 +152,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -175,7 +176,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -217,6 +218,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-s54-rtl/metal.ramrodata.lds b/bsp/coreip-s54-rtl/metal.ramrodata.lds
index 5afbc7b..de23402 100644
--- a/bsp/coreip-s54-rtl/metal.ramrodata.lds
+++ b/bsp/coreip-s54-rtl/metal.ramrodata.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x4000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x4000000
 }
 
 PHDRS
@@ -13,8 +14,8 @@ PHDRS
 	flash PT_LOAD;
 	ram_init PT_LOAD;
 	itim_init PT_LOAD;
-	ram PT_LOAD;
-	itim PT_LOAD;
+	ram PT_NULL;
+	itim PT_NULL;
 }
 
 SECTIONS
@@ -28,7 +29,7 @@ SECTIONS
 		KEEP (*(.text.metal.init.enter))
 		KEEP (*(SORT_NONE(.init)))
 		KEEP (*(.text.libgloss.start))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 
@@ -36,7 +37,7 @@ SECTIONS
 	.fini 		:
 	{
 		KEEP (*(SORT_NONE(.fini)))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	PROVIDE (__etext = .);
@@ -54,7 +55,7 @@ SECTIONS
 		PROVIDE_HIDDEN (__preinit_array_start = .);
 		KEEP (*(.preinit_array))
 		PROVIDE_HIDDEN (__preinit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.init_array 		:
@@ -63,7 +64,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
 		KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
 		PROVIDE_HIDDEN (__init_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.finit_array 		:
@@ -72,7 +73,7 @@ SECTIONS
 		KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
 		KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
 		PROVIDE_HIDDEN (__finit_array_end = .);
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ctors 		:
@@ -95,7 +96,7 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
 		KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dtors 		:
@@ -105,27 +106,27 @@ SECTIONS
 		KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
 		KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.litimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.ditimalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_itim_target_start = . );
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	.itim 		:
 	{
 		*(.itim .itim.*)
-	} >itim AT>ram :itim_init
+	} >itim AT>flash :itim_init
 
 
 	. = ALIGN(8);
@@ -137,7 +138,7 @@ SECTIONS
 		*(.text .text.*)
 		*(.gnu.linkonce.t.*)
 		*(.itim .itim.*)
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.lalign 		:
@@ -145,14 +146,14 @@ SECTIONS
 		. = ALIGN(4);
 		PROVIDE( _data_lma = . );
 		PROVIDE( metal_segment_data_source_start = . );
-	} >ram AT>ram :ram
+	} >flash AT>flash :flash
 
 
 	.dalign 		:
 	{
 		. = ALIGN(4);
 		PROVIDE( metal_segment_data_target_start = . );
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	.data 		:
@@ -172,7 +173,7 @@ SECTIONS
 		*(.srodata.cst4)
 		*(.srodata.cst2)
 		*(.srodata .srodata.*)
-	} >ram AT>ram :ram_init
+	} >ram AT>flash :ram_init
 
 
 	. = ALIGN(4);
@@ -214,6 +215,7 @@ SECTIONS
 	{
 		PROVIDE( metal_segment_heap_target_start = . );
 		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
 		PROVIDE( metal_segment_heap_target_end = . );
 		PROVIDE( _heap_end = . );
 	} >ram AT>ram :ram
diff --git a/bsp/coreip-s54-rtl/metal.scratchpad.lds b/bsp/coreip-s54-rtl/metal.scratchpad.lds
index bc7b16a..8ead4a8 100644
--- a/bsp/coreip-s54-rtl/metal.scratchpad.lds
+++ b/bsp/coreip-s54-rtl/metal.scratchpad.lds
@@ -4,8 +4,9 @@ ENTRY(_enter)
 
 MEMORY
 {
+	ram (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 0x10000
 	itim (wx!rai) : ORIGIN = 0x8000000, LENGTH = 0x4000
-	ram (wxa!ri) : ORIGIN = 0x20000000, LENGTH = 0x4000000
+	flash (rxai!w) : ORIGIN = 0x20000000, LENGTH = 0x4000000
 }
 
 PHDRS