Merge pull request #162 from sifive/heap-improvements

Improvements to dynamic memory allocation

7 files changed, 80 insertions, 28 deletions

diff --git a/bsp/coreip-e31-arty/mee.lds b/bsp/coreip-e31-arty/mee.lds
index c081d9f..7b28478 100644
--- a/bsp/coreip-e31-arty/mee.lds
+++ b/bsp/coreip-e31-arty/mee.lds
@@ -20,7 +20,8 @@ PHDRS
 
 SECTIONS
 {
-	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x800;
+	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
+	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
 
 
 	.init 		:
@@ -200,18 +201,26 @@ SECTIONS
 	PROVIDE( _end = . );
 	PROVIDE( end = . );
 	PROVIDE( mee_segment_bss_target_end = . );
-	PROVIDE( mee_segment_heap_target_start = . );
 
 
-	.stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
+	.stack :
 	{
-		PROVIDE( mee_segment_heap_target_end = . );
-		PROVIDE( _heap_end = . );
+		PROVIDE(mee_segment_stack_begin = .);
 		. = __stack_size;
 		PROVIDE( _sp = . );
 		PROVIDE(mee_segment_stack_end = .);
 	} >ram AT>ram :ram
 
 
+	.heap :
+	{
+		PROVIDE( mee_segment_heap_target_start = . );
+		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
+		PROVIDE( mee_segment_heap_target_end = . );
+		PROVIDE( _heap_end = . );
+	} >ram AT>ram :ram
+
+
 }
 
diff --git a/bsp/coreip-e31/mee.lds b/bsp/coreip-e31/mee.lds
index 538291d..08c0ccf 100644
--- a/bsp/coreip-e31/mee.lds
+++ b/bsp/coreip-e31/mee.lds
@@ -20,6 +20,7 @@ PHDRS
 SECTIONS
 {
 	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
+	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
 
 
 	.init 		:
@@ -199,18 +200,25 @@ SECTIONS
 	PROVIDE( _end = . );
 	PROVIDE( end = . );
 	PROVIDE( mee_segment_bss_target_end = . );
-	PROVIDE( mee_segment_heap_target_start = . );
 
 
 	.stack :
 	{
-		. = ALIGN(8);
-		. += __stack_size;
+		PROVIDE(mee_segment_stack_begin = .);
+		. = __stack_size;
 		PROVIDE( _sp = . );
-		PROVIDE( _heap_end = . );
 		PROVIDE(mee_segment_stack_end = .);
 	} >ram AT>ram :ram
 
 
+	.heap :
+	{
+		PROVIDE( mee_segment_heap_target_start = . );
+		. = __heap_size;
+		PROVIDE( mee_segment_heap_target_end = . );
+		PROVIDE( _heap_end = . );
+	} >ram AT>ram :ram
+
+
 }
 
diff --git a/bsp/coreip-s51-arty/mee.lds b/bsp/coreip-s51-arty/mee.lds
index c081d9f..7b28478 100644
--- a/bsp/coreip-s51-arty/mee.lds
+++ b/bsp/coreip-s51-arty/mee.lds
@@ -20,7 +20,8 @@ PHDRS
 
 SECTIONS
 {
-	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x800;
+	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
+	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
 
 
 	.init 		:
@@ -200,18 +201,26 @@ SECTIONS
 	PROVIDE( _end = . );
 	PROVIDE( end = . );
 	PROVIDE( mee_segment_bss_target_end = . );
-	PROVIDE( mee_segment_heap_target_start = . );
 
 
-	.stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
+	.stack :
 	{
-		PROVIDE( mee_segment_heap_target_end = . );
-		PROVIDE( _heap_end = . );
+		PROVIDE(mee_segment_stack_begin = .);
 		. = __stack_size;
 		PROVIDE( _sp = . );
 		PROVIDE(mee_segment_stack_end = .);
 	} >ram AT>ram :ram
 
 
+	.heap :
+	{
+		PROVIDE( mee_segment_heap_target_start = . );
+		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
+		PROVIDE( mee_segment_heap_target_end = . );
+		PROVIDE( _heap_end = . );
+	} >ram AT>ram :ram
+
+
 }
 
diff --git a/bsp/coreip-s51/mee.lds b/bsp/coreip-s51/mee.lds
index 3e454a7..2c2ba1c 100644
--- a/bsp/coreip-s51/mee.lds
+++ b/bsp/coreip-s51/mee.lds
@@ -20,6 +20,7 @@ PHDRS
 SECTIONS
 {
 	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
+	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
 
 
 	.init 		:
@@ -199,18 +200,25 @@ SECTIONS
 	PROVIDE( _end = . );
 	PROVIDE( end = . );
 	PROVIDE( mee_segment_bss_target_end = . );
-	PROVIDE( mee_segment_heap_target_start = . );
 
 
 	.stack :
 	{
-		. = ALIGN(8);
-		. += __stack_size;
+		PROVIDE(mee_segment_stack_begin = .);
+		. = __stack_size;
 		PROVIDE( _sp = . );
-		PROVIDE( _heap_end = . );
 		PROVIDE(mee_segment_stack_end = .);
 	} >ram AT>ram :ram
 
 
+	.heap :
+	{
+		PROVIDE( mee_segment_heap_target_start = . );
+		. = __heap_size;
+		PROVIDE( mee_segment_heap_target_end = . );
+		PROVIDE( _heap_end = . );
+	} >ram AT>ram :ram
+
+
 }
 
diff --git a/bsp/freedom-e310-arty/mee.lds b/bsp/freedom-e310-arty/mee.lds
index 8cd1a87..d5f73d5 100644
--- a/bsp/freedom-e310-arty/mee.lds
+++ b/bsp/freedom-e310-arty/mee.lds
@@ -20,7 +20,8 @@ PHDRS
 
 SECTIONS
 {
-	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x800;
+	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
+	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
 
 
 	.init 		:
@@ -200,18 +201,26 @@ SECTIONS
 	PROVIDE( _end = . );
 	PROVIDE( end = . );
 	PROVIDE( mee_segment_bss_target_end = . );
-	PROVIDE( mee_segment_heap_target_start = . );
 
 
-	.stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
+	.stack :
 	{
-		PROVIDE( mee_segment_heap_target_end = . );
-		PROVIDE( _heap_end = . );
+		PROVIDE(mee_segment_stack_begin = .);
 		. = __stack_size;
 		PROVIDE( _sp = . );
 		PROVIDE(mee_segment_stack_end = .);
 	} >ram AT>ram :ram
 
 
+	.heap :
+	{
+		PROVIDE( mee_segment_heap_target_start = . );
+		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
+		PROVIDE( mee_segment_heap_target_end = . );
+		PROVIDE( _heap_end = . );
+	} >ram AT>ram :ram
+
+
 }
 
diff --git a/bsp/sifive-hifive1/mee.lds b/bsp/sifive-hifive1/mee.lds
index 0e0a302..1c894ee 100644
--- a/bsp/sifive-hifive1/mee.lds
+++ b/bsp/sifive-hifive1/mee.lds
@@ -19,7 +19,8 @@ PHDRS
 
 SECTIONS
 {
-	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x800;
+	__stack_size = DEFINED(__stack_size) ? __stack_size : 0x400;
+	__heap_size = DEFINED(__heap_size) ? __heap_size : 0x400;
 
 
 	.init 		:
@@ -199,18 +200,26 @@ SECTIONS
 	PROVIDE( _end = . );
 	PROVIDE( end = . );
 	PROVIDE( mee_segment_bss_target_end = . );
-	PROVIDE( mee_segment_heap_target_start = . );
 
 
-	.stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
+	.stack :
 	{
-		PROVIDE( mee_segment_heap_target_end = . );
-		PROVIDE( _heap_end = . );
+		PROVIDE(mee_segment_stack_begin = .);
 		. = __stack_size;
 		PROVIDE( _sp = . );
 		PROVIDE(mee_segment_stack_end = .);
 	} >ram AT>ram :ram
 
 
+	.heap :
+	{
+		PROVIDE( mee_segment_heap_target_start = . );
+		. = __heap_size;
+		. = __heap_size == 0 ? 0 : ORIGIN(ram) + LENGTH(ram);
+		PROVIDE( mee_segment_heap_target_end = . );
+		PROVIDE( _heap_end = . );
+	} >ram AT>ram :ram
+
+
 }
 
diff --git a/freedom-mee b/freedom-mee
-Subproject 6f75473c8c1bc53b0a5b973cdd87c2aafdcdb28
+Subproject 0d7c5e977cd9a9445dd949e1a5bb1474b046bd1