Make the memory layout more flexible
Currently the platform code gets to define the base address of each
boot loader image. However, the linker scripts couteract this
flexibility by enforcing a fixed overall layout of the different
images. For example, they require that the BL3-1 image sits below
the BL2 image. Choosing BL3-1 and BL2 base addresses in such a way
that it violates this constraint makes the build fail at link-time.
This patch requires the platform code to now define a limit address
for each image. The linker scripts check that the image fits within
these bounds so they don't rely anymore on the position of a given
image in regard to the others.
Fixes ARM-software/tf-issues#163
Change-Id: I8c108646825da19a6a8dfb091b613e1dd4ae133c
diff --git a/plat/fvp/platform.h b/plat/fvp/platform.h
index ff87cf8..7fdbf81 100644
--- a/plat/fvp/platform.h
+++ b/plat/fvp/platform.h
@@ -237,21 +237,29 @@
/*******************************************************************************
* BL1 specific defines.
- * BL1 RW data is relocated from ROM to RAM at runtime so we need 2 base
+ * BL1 RW data is relocated from ROM to RAM at runtime so we need 2 sets of
* addresses.
******************************************************************************/
#define BL1_RO_BASE TZROM_BASE
+#define BL1_RO_LIMIT (TZROM_BASE + TZROM_SIZE)
#define BL1_RW_BASE TZRAM_BASE
+#define BL1_RW_LIMIT BL31_BASE
/*******************************************************************************
* BL2 specific defines.
******************************************************************************/
#define BL2_BASE (TZRAM_BASE + TZRAM_SIZE - 0xc000)
+#define BL2_LIMIT (TZRAM_BASE + TZRAM_SIZE)
/*******************************************************************************
* BL31 specific defines.
******************************************************************************/
#define BL31_BASE (TZRAM_BASE + 0x6000)
+#if TSP_RAM_LOCATION_ID == TSP_IN_TZRAM
+#define BL31_LIMIT BL32_BASE
+#elif TSP_RAM_LOCATION_ID == TSP_IN_TZDRAM
+#define BL31_LIMIT BL2_BASE
+#endif
/*******************************************************************************
* BL32 specific defines.