feat(stm32mp1): enable BL2_IN_XIP_MEM to remove relocation sections

Because the BL2 is not relocated, the usage of BL2_IN_XIP_MEM
can be used. It reduces the binary size by removing all relocation
sections. XIP will not be used when STM32MP_USE_STM32IMAGE is
defined. Introduce new definitions for SEPARATE_CODE_AND_RODATA.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Change-Id: Ifd76f14e5bc98990bf84e0bfd4ee0b4e49a9a293
diff --git a/plat/st/stm32mp1/stm32mp1_fip_def.h b/plat/st/stm32mp1/stm32mp1_fip_def.h
index d8561dc..41972e4 100644
--- a/plat/st/stm32mp1/stm32mp1_fip_def.h
+++ b/plat/st/stm32mp1/stm32mp1_fip_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2021-2022, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -10,9 +10,10 @@
 #define STM32MP_DDR_S_SIZE		U(0x01E00000)	/* 30 MB */
 #define STM32MP_DDR_SHMEM_SIZE		U(0x00200000)	/* 2 MB */
 
-#define STM32MP_BL2_SIZE		U(0x0001B000)	/* 108 KB for BL2 */
-#define STM32MP_BL2_DTB_SIZE		U(0x00006000)	/* 24 KB for DTB */
-#define STM32MP_BL32_SIZE		U(0x00019000)	/* 100 KB for BL32 */
+#define STM32MP_BL2_RO_SIZE		U(0x00011000)	/* 68 KB */
+#define STM32MP_BL2_SIZE		U(0x00016000)	/* 88 KB for BL2 */
+#define STM32MP_BL2_DTB_SIZE		U(0x00007000)	/* 28 KB for DTB */
+#define STM32MP_BL32_SIZE		U(0x0001B000)	/* 108 KB for BL32 */
 #define STM32MP_BL32_DTB_SIZE		U(0x00005000)	/* 20 KB for DTB */
 #define STM32MP_FW_CONFIG_MAX_SIZE	PAGE_SIZE	/* 4 KB for FCONF DTB */
 #define STM32MP_HW_CONFIG_MAX_SIZE	U(0x40000)	/* 256 KB for HW config DTB */
@@ -21,6 +22,15 @@
 					 STM32MP_SEC_SYSRAM_SIZE - \
 					 STM32MP_BL2_SIZE)
 
+#define STM32MP_BL2_RO_BASE		STM32MP_BL2_BASE
+
+#define STM32MP_BL2_RW_BASE		(STM32MP_BL2_RO_BASE + \
+					 STM32MP_BL2_RO_SIZE)
+
+#define STM32MP_BL2_RW_SIZE		(STM32MP_SEC_SYSRAM_BASE + \
+					 STM32MP_SEC_SYSRAM_SIZE - \
+					 STM32MP_BL2_RW_BASE)
+
 #define STM32MP_BL2_DTB_BASE		(STM32MP_BL2_BASE - \
 					 STM32MP_BL2_DTB_SIZE)