Rework linker scripts.

Having separate linker scripts for all the boards is a bad idea. Most
boards really only need to specify MEMORY and the appropriate
REGION_ALIASES() so that support/ld/common.inc can do its work. Not
having infrastructure for this leads to duplication -- viz. the Maple
Mini linker scripts are identical to the Maple's, and the
olimex_stm32_h103 linker directory is just a symlink to
Maple's. Clearly, the current structure is wrong.

To fix it, instead of having per-board subdirectories of support/ld/,
add per-MEMORY subdirectories of (new) support/ld/stm32/mem/. The
per-board .mk files under support/mk/board-includes/ now reference
these directly, and target-config.mk and the Makefile handle this
appropriately. We move some other stuff around in target-config.mk to
make this all more convenient, and even allow more overriding of the
libmaple defaults on a per-board basis. Custom board hacks will be
easier now.

Unfortunately, lots of duplication under support/ld/stm32/mem/ is
necessary, as the LENGTH attribute in a MEMORY region specification
doesn't support arithmetic expressions, and ld doesn't seem to have
any way to specify MEMORY at the command line (why?!). If we find a
better way than this, we should do it.

If a board (e.g. Maple Native) _does_ really need special
memory-related configuration, you can always put a per-board
subdirectory of support/ld/stm32/mem. We do this here to configure the
heap.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

43 files changed, 198 insertions, 368 deletions

diff --git a/support/ld/VLDiscovery/flash.ld b/support/ld/VLDiscovery/flash.ld
deleted file mode 100644
index 44ff8a1..0000000
--- a/support/ld/VLDiscovery/flash.ld
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * VLDiscovery (STM32F100RBT6, medium density) linker script for Flash builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/*
- * Define the rest of the sections
- */
-_FLASH_BUILD = 1;
-
-INCLUDE common.inc
diff --git a/support/ld/VLDiscovery/jtag.ld b/support/ld/VLDiscovery/jtag.ld
deleted file mode 100644
index b952572..0000000
--- a/support/ld/VLDiscovery/jtag.ld
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * VLDiscovery (STM32F100RBT6, medium density) linker script for JTAG (bare
- * metal, no bootloader) builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/*
- * Define the rest of the sections
- */
-_FLASH_BUILD = 1;
-INCLUDE common.inc
diff --git a/support/ld/VLDiscovery/ram.ld b/support/ld/VLDiscovery/ram.ld
deleted file mode 100644
index d659cd6..0000000
--- a/support/ld/VLDiscovery/ram.ld
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * VLDiscovery (STM32F100RBT6, medium density) linker script for RAM builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 0K
-}
-
-REGION_ALIAS("REGION_TEXT", ram);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", ram);
-
-/*
- * Define the rest of the sections
- */
-INCLUDE common.inc
diff --git a/support/ld/flash.ld b/support/ld/flash.ld
new file mode 100644
index 0000000..9e250cd
--- /dev/null
+++ b/support/ld/flash.ld
@@ -0,0 +1,26 @@
+/*
+ * libmaple linker script for "Flash" builds.
+ *
+ * A Flash build puts .text (and .rodata) in Flash, and
+ * .data/.bss/heap (of course) in SRAM, but offsets the sections by
+ * enough space to store the Maple bootloader, which lives in low
+ * Flash and uses low memory.
+ */
+
+/*
+ * This pulls in the appropriate MEMORY declaration from the right
+ * subdirectory of stm32/mem/ (the environment must call ld with the
+ * right include directory flags to make this happen). Boards can also
+ * use this file to use any of libmaple's memory-related hooks (like
+ * where the heap should live).
+ */
+INCLUDE mem-flash.inc
+
+/* Provide memory region aliases for common.inc */
+REGION_ALIAS("REGION_TEXT", rom);
+REGION_ALIAS("REGION_DATA", ram);
+REGION_ALIAS("REGION_BSS", ram);
+REGION_ALIAS("REGION_RODATA", rom);
+
+/* Let common.inc handle the real work. */
+INCLUDE common.inc
diff --git a/support/ld/jtag.ld b/support/ld/jtag.ld
new file mode 100644
index 0000000..0612f95
--- /dev/null
+++ b/support/ld/jtag.ld
@@ -0,0 +1,31 @@
+/*
+ * libmaple linker script for "JTAG" builds.
+ *
+ * A "JTAG" build puts .text (and .rodata) in Flash, and
+ * .data/.bss/heap (of course) in SRAM, but links starting at the
+ * Flash and SRAM starting addresses (0x08000000 and 0x20000000
+ * respectively). This will wipe out a Maple bootloader if there's one
+ * on the board, so only use this if you know what you're doing.
+ *
+ * Of course, a "JTAG" build is perfectly usable for upload over SWD,
+ * the system memory bootloader, etc. The name is just a historical
+ * artifact.
+ */
+
+/*
+ * This pulls in the appropriate MEMORY declaration from the right
+ * subdirectory of stm32/mem/ (the environment must call ld with the
+ * right include directory flags to make this happen). Boards can also
+ * use this file to use any of libmaple's memory-related hooks (like
+ * where the heap should live).
+ */
+INCLUDE mem-jtag.inc
+
+/* Provide memory region aliases for common.inc */
+REGION_ALIAS("REGION_TEXT", rom);
+REGION_ALIAS("REGION_DATA", ram);
+REGION_ALIAS("REGION_BSS", ram);
+REGION_ALIAS("REGION_RODATA", rom);
+
+/* Let common.inc handle the real work. */
+INCLUDE common.inc
diff --git a/support/ld/maple/flash.ld b/support/ld/maple/flash.ld
deleted file mode 100644
index 190c187..0000000
--- a/support/ld/maple/flash.ld
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Maple (STM32F103RBT6, medium density) linker script for Flash builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 17K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 108K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/*
- * Define the rest of the sections
- */
-_FLASH_BUILD = 1;
-
-INCLUDE common.inc
diff --git a/support/ld/maple/jtag.ld b/support/ld/maple/jtag.ld
deleted file mode 100644
index c090988..0000000
--- a/support/ld/maple/jtag.ld
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Maple (STM32F103RBT6, medium density) linker script for JTAG (bare
- * metal, no bootloader) builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/*
- * Define the rest of the sections
- */
-_FLASH_BUILD = 1;
-INCLUDE common.inc
diff --git a/support/ld/maple/ram.ld b/support/ld/maple/ram.ld
deleted file mode 100644
index a5ef621..0000000
--- a/support/ld/maple/ram.ld
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Maple (STM32F103RBT6, medium density) linker script for RAM builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 17K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 0K
-}
-
-REGION_ALIAS("REGION_TEXT", ram);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", ram);
-
-/*
- * Define the rest of the sections
- */
-INCLUDE common.inc
diff --git a/support/ld/maple_RET6/flash.ld b/support/ld/maple_RET6/flash.ld
deleted file mode 100644
index 8b529f8..0000000
--- a/support/ld/maple_RET6/flash.ld
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * Maple RET6 Edition (STM32F103RET6, high density) linker script for
- * Flash builds.
- */
-
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 492K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-_FLASH_BUILD = 1;
-INCLUDE common.inc
diff --git a/support/ld/maple_RET6/jtag.ld b/support/ld/maple_RET6/jtag.ld
deleted file mode 100644
index 4ac9d76..0000000
--- a/support/ld/maple_RET6/jtag.ld
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * Maple RET6 Edition (STM32F103RET6, high density) linker script for
- * JTAG (bare metal, no bootloader) builds.
- */
-
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 512K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-_FLASH_BUILD = 1;
-INCLUDE common.inc
diff --git a/support/ld/maple_RET6/ram.ld b/support/ld/maple_RET6/ram.ld
deleted file mode 100644
index 65c3a2c..0000000
--- a/support/ld/maple_RET6/ram.ld
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Maple RET6 Edition (STM32F103RET6, high density) linker script for
- * RAM builds.
- */
-
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 0K
-}
-
-REGION_ALIAS("REGION_TEXT", ram);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", ram);
-
-INCLUDE common.inc
diff --git a/support/ld/maple_mini/flash.ld b/support/ld/maple_mini/flash.ld
deleted file mode 100644
index 52d01dc..0000000
--- a/support/ld/maple_mini/flash.ld
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Maple Mini (STM32F103CBT6, medium density) linker script for Flash builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 17K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 108K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/*
- * Define the rest of the sections
- */
-_FLASH_BUILD = 1;
-INCLUDE common.inc
diff --git a/support/ld/maple_mini/jtag.ld b/support/ld/maple_mini/jtag.ld
deleted file mode 100644
index 28e204f..0000000
--- a/support/ld/maple_mini/jtag.ld
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Maple Mini (STM32F103CBT6, medium density) linker script for JTAG
- * (bare metal, no bootloader) builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/*
- * Define the rest of the sections
- */
-_FLASH_BUILD = 1;
-INCLUDE common.inc
diff --git a/support/ld/maple_mini/ram.ld b/support/ld/maple_mini/ram.ld
deleted file mode 100644
index 5b0111b..0000000
--- a/support/ld/maple_mini/ram.ld
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Maple Mini (STM32F103CBT6, medium density) linker script for RAM builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 17K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 0K
-}
-
-REGION_ALIAS("REGION_TEXT", ram);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", ram);
-
-/*
- * Define the rest of the sections
- */
-INCLUDE common.inc
diff --git a/support/ld/maple_native/flash.ld b/support/ld/maple_native/flash.ld
deleted file mode 100644
index aac5325..0000000
--- a/support/ld/maple_native/flash.ld
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Maple Native (STM32F103ZET6, high density) linker script for Flash builds.
- */
-
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 492K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/* Specify heap boundary addresses on the external SRAM chip */
-_lm_heap_start = 0x60000000;
-_lm_heap_end = 0x60100000;
-
-_FLASH_BUILD = 1;
-INCLUDE common.inc
-
diff --git a/support/ld/maple_native/jtag.ld b/support/ld/maple_native/jtag.ld
deleted file mode 100644
index 412348e..0000000
--- a/support/ld/maple_native/jtag.ld
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Maple Native (STM32F103ZET6, high density) linker script for JTAG
- * (bare metal, no bootloader) builds.
- */
-
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 512K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/* Specify heap boundary addresses on the external SRAM chip */
-_lm_heap_start = 0x60000000;
-_lm_heap_end = 0x60100000;
-
-_FLASH_BUILD = 1;
-INCLUDE common.inc
diff --git a/support/ld/maple_native/ram.ld b/support/ld/maple_native/ram.ld
deleted file mode 100644
index eeec761..0000000
--- a/support/ld/maple_native/ram.ld
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Maple Native (STM32F103ZET6, high density) linker script for RAM builds.
- */
-
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
-  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 0K
-}
-
-REGION_ALIAS("REGION_TEXT", ram);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", ram);
-
-/* Specify heap boundary addresses on the external SRAM chip */
-_lm_heap_start = 0x60000000;
-_lm_heap_end = 0x60100000;
-
-INCLUDE common.inc
diff --git a/support/ld/olimex_stm32_h103 b/support/ld/olimex_stm32_h103
deleted file mode 120000
index 2d8bbed..0000000
--- a/support/ld/olimex_stm32_h103
+++ /dev/null
@@ -1 +0,0 @@
-maple
\ No newline at end of file
diff --git a/support/ld/ram.ld b/support/ld/ram.ld
new file mode 100644
index 0000000..34b468e
--- /dev/null
+++ b/support/ld/ram.ld
@@ -0,0 +1,25 @@
+/*
+ * libmaple linker script for RAM builds.
+ *
+ * A Flash build puts .text, .rodata, and .data/.bss/heap (of course)
+ * in SRAM, but offsets the sections by enough space to store the
+ * Maple bootloader, which uses low memory.
+ */
+
+/*
+ * This pulls in the appropriate MEMORY declaration from the right
+ * subdirectory of stm32/mem/ (the environment must call ld with the
+ * right include directory flags to make this happen). Boards can also
+ * use this file to use any of libmaple's memory-related hooks (like
+ * where the heap should live).
+ */
+INCLUDE mem-ram.inc
+
+/* Provide memory region aliases for common.inc */
+REGION_ALIAS("REGION_TEXT", ram);
+REGION_ALIAS("REGION_DATA", ram);
+REGION_ALIAS("REGION_BSS", ram);
+REGION_ALIAS("REGION_RODATA", ram);
+
+/* Let common.inc handle the real work. */
+INCLUDE common.inc
diff --git a/support/ld/st_stm3220g_eval/jtag.ld b/support/ld/st_stm3220g_eval/jtag.ld
deleted file mode 100644
index 4193f5b..0000000
--- a/support/ld/st_stm3220g_eval/jtag.ld
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * STM3220G-EVAL (STM32F207IGH6) linker script for JTAG (bare metal,
- * no bootloader) builds.
- */
-
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 128K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 1024K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-INCLUDE common.inc
diff --git a/support/ld/stm32/mem/maple_native/maple_native_heap.inc b/support/ld/stm32/mem/maple_native/maple_native_heap.inc
new file mode 100644
index 0000000..34b5a2d
--- /dev/null
+++ b/support/ld/stm32/mem/maple_native/maple_native_heap.inc
@@ -0,0 +1,3 @@
+/* Specify heap boundary addresses on the external SRAM chip */
+_lm_heap_start = 0x60000000;
+_lm_heap_end = 0x60100000;
diff --git a/support/ld/stm32/mem/maple_native/mem-flash.inc b/support/ld/stm32/mem/maple_native/mem-flash.inc
new file mode 100644
index 0000000..bae4f39
--- /dev/null
+++ b/support/ld/stm32/mem/maple_native/mem-flash.inc
@@ -0,0 +1,7 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
+  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 492K
+}
+
+INCLUDE maple_native_heap.inc
diff --git a/support/ld/stm32/mem/maple_native/mem-jtag.inc b/support/ld/stm32/mem/maple_native/mem-jtag.inc
new file mode 100644
index 0000000..508ed44
--- /dev/null
+++ b/support/ld/stm32/mem/maple_native/mem-jtag.inc
@@ -0,0 +1,7 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 512K
+}
+
+INCLUDE maple_native_heap.inc
diff --git a/support/ld/stm32/mem/maple_native/mem-ram.inc b/support/ld/stm32/mem/maple_native/mem-ram.inc
new file mode 100644
index 0000000..6ae11ef
--- /dev/null
+++ b/support/ld/stm32/mem/maple_native/mem-ram.inc
@@ -0,0 +1,7 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
+  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 0K
+}
+
+INCLUDE maple_native_heap.inc
diff --git a/support/ld/stm32/mem/sram_112k_flash_1024k/mem-jtag.inc b/support/ld/stm32/mem/sram_112k_flash_1024k/mem-jtag.inc
new file mode 100644
index 0000000..e0d2da1
--- /dev/null
+++ b/support/ld/stm32/mem/sram_112k_flash_1024k/mem-jtag.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 112K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 1024K
+}
diff --git a/support/ld/stm32/mem/sram_112k_flash_1024k/mem-ram.inc b/support/ld/stm32/mem/sram_112k_flash_1024k/mem-ram.inc
new file mode 100644
index 0000000..d21f17c
--- /dev/null
+++ b/support/ld/stm32/mem/sram_112k_flash_1024k/mem-ram.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 112K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 0K
+}
diff --git a/support/ld/stm32/mem/sram_20k_flash_128k/mem-flash.inc b/support/ld/stm32/mem/sram_20k_flash_128k/mem-flash.inc
new file mode 100644
index 0000000..a9091ca
--- /dev/null
+++ b/support/ld/stm32/mem/sram_20k_flash_128k/mem-flash.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 17K
+  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 108K
+}
diff --git a/support/ld/stm32/mem/sram_20k_flash_128k/mem-jtag.inc b/support/ld/stm32/mem/sram_20k_flash_128k/mem-jtag.inc
new file mode 100644
index 0000000..20fbec0
--- /dev/null
+++ b/support/ld/stm32/mem/sram_20k_flash_128k/mem-jtag.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
+}
diff --git a/support/ld/stm32/mem/sram_20k_flash_128k/mem-ram.inc b/support/ld/stm32/mem/sram_20k_flash_128k/mem-ram.inc
new file mode 100644
index 0000000..f02453b
--- /dev/null
+++ b/support/ld/stm32/mem/sram_20k_flash_128k/mem-ram.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 17K
+  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 0K
+}
diff --git a/support/ld/stm32/mem/sram_64k_flash_512k/mem-flash.inc b/support/ld/stm32/mem/sram_64k_flash_512k/mem-flash.inc
new file mode 100644
index 0000000..ddb8876
--- /dev/null
+++ b/support/ld/stm32/mem/sram_64k_flash_512k/mem-flash.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
+  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 492K
+}
diff --git a/support/ld/stm32/mem/sram_64k_flash_512k/mem-jtag.inc b/support/ld/stm32/mem/sram_64k_flash_512k/mem-jtag.inc
new file mode 100644
index 0000000..d3ed992
--- /dev/null
+++ b/support/ld/stm32/mem/sram_64k_flash_512k/mem-jtag.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 512K
+}
diff --git a/support/ld/stm32/mem/sram_64k_flash_512k/mem-ram.inc b/support/ld/stm32/mem/sram_64k_flash_512k/mem-ram.inc
new file mode 100644
index 0000000..360beaf
--- /dev/null
+++ b/support/ld/stm32/mem/sram_64k_flash_512k/mem-ram.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000C00, LENGTH = 61K
+  rom (rx)  : ORIGIN = 0x08005000, LENGTH = 0K
+}
diff --git a/support/ld/stm32/mem/sram_8k_flash_128k/mem-flash.inc b/support/ld/stm32/mem/sram_8k_flash_128k/mem-flash.inc
new file mode 100644
index 0000000..19372b7
--- /dev/null
+++ b/support/ld/stm32/mem/sram_8k_flash_128k/mem-flash.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
+}
diff --git a/support/ld/stm32/mem/sram_8k_flash_128k/mem-jtag.inc b/support/ld/stm32/mem/sram_8k_flash_128k/mem-jtag.inc
new file mode 100644
index 0000000..19372b7
--- /dev/null
+++ b/support/ld/stm32/mem/sram_8k_flash_128k/mem-jtag.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
+}
diff --git a/support/ld/stm32/mem/sram_8k_flash_128k/mem-ram.inc b/support/ld/stm32/mem/sram_8k_flash_128k/mem-ram.inc
new file mode 100644
index 0000000..4063ab4
--- /dev/null
+++ b/support/ld/stm32/mem/sram_8k_flash_128k/mem-ram.inc
@@ -0,0 +1,5 @@
+MEMORY
+{
+  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
+  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 0K
+}
diff --git a/support/make/board-includes/VLDiscovery.mk b/support/make/board-includes/VLDiscovery.mk
index 441f078..76cd85a 100644
--- a/support/make/board-includes/VLDiscovery.mk
+++ b/support/make/board-includes/VLDiscovery.mk
@@ -4,3 +4,4 @@ ERROR_LED_PORT := GPIOC
 ERROR_LED_PIN  := 9
 MCU_SERIES := stm32f1
 MCU_F1_LINE := value
+LD_MEM_DIR := sram_8k_flash_128k
diff --git a/support/make/board-includes/maple.mk b/support/make/board-includes/maple.mk
index 4de4bab..a2943ce 100644
--- a/support/make/board-includes/maple.mk
+++ b/support/make/board-includes/maple.mk
@@ -4,3 +4,7 @@ ERROR_LED_PORT := GPIOA
 ERROR_LED_PIN  := 5
 MCU_SERIES := stm32f1
 MCU_F1_LINE := performance
+# This crap is due to ld-script limitations. If you know of a better
+# way to go about this (like some magic ld switches to specify MEMORY
+# at the command line), please tell us!
+LD_MEM_DIR := sram_20k_flash_128k
diff --git a/support/make/board-includes/maple_RET6.mk b/support/make/board-includes/maple_RET6.mk
index 104ae08..138722f 100644
--- a/support/make/board-includes/maple_RET6.mk
+++ b/support/make/board-includes/maple_RET6.mk
@@ -4,3 +4,4 @@ ERROR_LED_PORT := GPIOA
 ERROR_LED_PIN := 5
 MCU_SERIES := stm32f1
 MCU_F1_LINE := performance
+LD_MEM_DIR := sram_64k_flash_512k
diff --git a/support/make/board-includes/maple_mini.mk b/support/make/board-includes/maple_mini.mk
index 70ef506..b022537 100644
--- a/support/make/board-includes/maple_mini.mk
+++ b/support/make/board-includes/maple_mini.mk
@@ -4,3 +4,4 @@ ERROR_LED_PORT := GPIOB
 ERROR_LED_PIN  := 1
 MCU_SERIES := stm32f1
 MCU_F1_LINE := performance
+LD_MEM_DIR := sram_20k_flash_128k
diff --git a/support/make/board-includes/maple_native.mk b/support/make/board-includes/maple_native.mk
index 86746a6..87e58e3 100644
--- a/support/make/board-includes/maple_native.mk
+++ b/support/make/board-includes/maple_native.mk
@@ -4,3 +4,4 @@ ERROR_LED_PORT := GPIOC
 ERROR_LED_PIN  := 15
 MCU_SERIES := stm32f1
 MCU_F1_LINE := performance
+LD_MEM_DIR := maple_native 	# The SRAM chip makes this board special
diff --git a/support/make/board-includes/olimex_stm32_h103.mk b/support/make/board-includes/olimex_stm32_h103.mk
index 31f2c04..a3304a1 100644
--- a/support/make/board-includes/olimex_stm32_h103.mk
+++ b/support/make/board-includes/olimex_stm32_h103.mk
@@ -4,3 +4,4 @@ ERROR_LED_PORT := GPIOC
 ERROR_LED_PIN := 12
 MCU_SERIES := stm32f1
 MCU_F1_LINE := performance
+LD_MEM_DIR := sram_20k_flash_128k
diff --git a/support/make/board-includes/st_stm3220g_eval.mk b/support/make/board-includes/st_stm3220g_eval.mk
index f8073ea..8aaefc9 100644
--- a/support/make/board-includes/st_stm3220g_eval.mk
+++ b/support/make/board-includes/st_stm3220g_eval.mk
@@ -2,3 +2,4 @@ MCU := STM32F207IG
 ERROR_LED_PORT := GPIOG
 ERROR_LED_PIN := 6
 MCU_SERIES := stm32f2
+LD_MEM_DIR := sram_112k_flash_1024k
diff --git a/support/make/target-config.mk b/support/make/target-config.mk
index a04ca38..ea5dfd9 100644
--- a/support/make/target-config.mk
+++ b/support/make/target-config.mk
@@ -1,39 +1,42 @@
 # TARGET_FLAGS are to be passed while compiling, assembling, linking.
-
 TARGET_FLAGS :=
+# TARGET_LDFLAGS go to the linker
+TARGET_LDFLAGS :=
 
-# Board-specific configuration values. Punt these to board-specific
-# include files.
+# Configuration derived from $(MEMORY_TARGET)
 
-include $(BOARD_INCLUDE_DIR)/$(BOARD).mk
+LD_SCRIPT_PATH := $(LDDIR)/$(MEMORY_TARGET).ld
 
-TARGET_FLAGS += -DBOARD_$(BOARD) -DMCU_$(MCU) \
-                -DERROR_LED_PORT=$(ERROR_LED_PORT) \
-                -DERROR_LED_PIN=$(ERROR_LED_PIN)
+ifeq ($(MEMORY_TARGET), ram)
+VECT_BASE_ADDR := VECT_TAB_RAM
+endif
+ifeq ($(MEMORY_TARGET), flash)
+VECT_BASE_ADDR := VECT_TAB_FLASH
+endif
+ifeq ($(MEMORY_TARGET), jtag)
+VECT_BASE_ADDR := VECT_TAB_BASE
+endif
+
+# Pull in the board configuration file here, so it can override the
+# above.
+
+include $(BOARD_INCLUDE_DIR)/$(BOARD).mk
 
-# STM32 series-specific configuration values.
+# Configuration derived from $(BOARD).mk
 
 LD_SERIES_PATH := $(LDDIR)/stm32/series/$(MCU_SERIES)
+LD_MEM_PATH := $(LDDIR)/stm32/mem/$(LD_MEM_DIR)
 ifeq ($(MCU_SERIES), stm32f1)
 # Due to the Balkanization on F1, we need to specify the line when
 # making linker decisions.
 LD_SERIES_PATH := $(LD_SERIES_PATH)/$(MCU_F1_LINE)
 endif
-LIBMAPLE_MODULE_SERIES := $(LIBMAPLE_PATH)/$(MCU_SERIES)
-
-# Memory target-specific configuration values
 
-ifeq ($(MEMORY_TARGET), ram)
-   LDSCRIPT := $(BOARD)/ram.ld
-   VECT_BASE_ADDR := VECT_TAB_RAM
-endif
-ifeq ($(MEMORY_TARGET), flash)
-   LDSCRIPT := $(BOARD)/flash.ld
-   VECT_BASE_ADDR := VECT_TAB_FLASH
-endif
-ifeq ($(MEMORY_TARGET), jtag)
-   LDSCRIPT := $(BOARD)/jtag.ld
-   VECT_BASE_ADDR := VECT_TAB_BASE
-endif
+TARGET_LDFLAGS += -T$(LD_SCRIPT_PATH) -L $(LD_SERIES_PATH) \
+	          -L $(LD_MEM_PATH) -L$(LDDIR)
+TARGET_FLAGS += -DBOARD_$(BOARD) -DMCU_$(MCU) \
+                -DERROR_LED_PORT=$(ERROR_LED_PORT) \
+                -DERROR_LED_PIN=$(ERROR_LED_PIN) \
+                -D$(VECT_BASE_ADDR)
 
-TARGET_FLAGS += -D$(VECT_BASE_ADDR)
+LIBMAPLE_MODULE_SERIES := $(LIBMAPLE_PATH)/$(MCU_SERIES)