uniphier: make all BL images completely position-independent
This platform supports multiple SoCs. The next SoC will still keep
quite similar architecture, but the memory base will be changed.
The ENABLE_PIE improves the maintainability and usability. You can reuse
a single set of BL images for other SoC/board without re-compiling TF-A
at all. This will also keep the code cleaner because it avoids #ifdef
around various base addresses.
By defining ENABLE_PIE, BL2_AT_EL3, BL31, and BL32 (TSP) are really
position-independent now. You can load them anywhere irrespective of
their link address.
Change-Id: I8d5e3124ee30012f5b3bfa278b0baff8efd2fff7
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/plat/socionext/uniphier/include/platform_def.h b/plat/socionext/uniphier/include/platform_def.h
index 30e0924..7c6341d 100644
--- a/plat/socionext/uniphier/include/platform_def.h
+++ b/plat/socionext/uniphier/include/platform_def.h
@@ -28,16 +28,36 @@
#define PLAT_MAX_OFF_STATE U(2)
#define PLAT_MAX_RET_STATE U(1)
-#define BL2_BASE ULL(0x80000000)
-#define BL2_LIMIT ULL(0x80080000)
+#define UNIPHIER_BL2_OFFSET UL(0x00000000)
+#define UNIPHIER_BL2_MAX_SIZE UL(0x00080000)
-/* 0x80080000-0x81000000: reserved for DSP */
+/* 0x00080000-0x01000000: reserved for DSP */
-#define BL31_BASE ULL(0x81000000)
-#define BL31_LIMIT ULL(0x81080000)
+#define UNIPHIER_BL31_OFFSET UL(0x01000000)
+#define UNIPHIER_BL31_MAX_SIZE UL(0x00080000)
+
+#define UNIPHIER_BL32_OFFSET UL(0x01080000)
+#define UNIPHIER_BL32_MAX_SIZE UL(0x00100000)
+
+/*
+ * The link addresses are determined by UNIPHIER_MEM_BASE + offset.
+ * When ENABLE_PIE is set, all the TF images can be loaded anywhere, so
+ * UNIPHIER_MEM_BASE is arbitrary.
+ *
+ * When ENABLE_PIE is unset, UNIPHIER_MEM_BASE should be chosen so that
+ * BL2_BASE matches to the physical address where BL2 is loaded, that is,
+ * UNIPHIER_MEM_BASE should be the base address of the DRAM region.
+ */
+#define UNIPHIER_MEM_BASE UL(0x00000000)
+
+#define BL2_BASE (UNIPHIER_MEM_BASE + UNIPHIER_BL2_OFFSET)
+#define BL2_LIMIT (BL2_BASE + UNIPHIER_BL2_MAX_SIZE)
+
+#define BL31_BASE (UNIPHIER_MEM_BASE + UNIPHIER_BL31_OFFSET)
+#define BL31_LIMIT (BL31_BASE + UNIPHIER_BL31_MAX_SIZE)
-#define BL32_BASE ULL(0x81080000)
-#define BL32_LIMIT ULL(0x81180000)
+#define BL32_BASE (UNIPHIER_MEM_BASE + UNIPHIER_BL32_OFFSET)
+#define BL32_LIMIT (BL32_BASE + UNIPHIER_BL32_MAX_SIZE)
#define PLAT_PHY_ADDR_SPACE_SIZE (1ULL << 32)
#define PLAT_VIRT_ADDR_SPACE_SIZE (1ULL << 32)