[PATCH] configs: am43xx: Migrate to CONFIG_SYS_MEM_TOP_HIDE from CFG_PRAM

[Beleswar Padhi]

The TI AM43xx HS boards have been using CFG_PRAM to hide the top 64MB
firewalled DRAM memory from U-Boot. However, CFG_PRAM only prevents
U-Boot from relocating into that memory, but it is still open for access
for any other usage.

Therefore, migrate into using CONFIG_SYS_MEM_TOP_HIDE which reduces the
ram size itself ensuring that memory is not visible to U-Boot at all
(either for reloc, or general usage).

Signed-off-by: Beleswar Padhi <b-padhi at ti.com>
---
Note: Build tested only.
Cc: Judith Mendez <jm at ti.com>

 configs/am43xx_hs_evm_defconfig      | 1 +
 configs/am43xx_hs_evm_qspi_defconfig | 1 +
 include/configs/am43xx_evm.h         | 5 -----
 3 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/configs/am43xx_hs_evm_defconfig b/configs/am43xx_hs_evm_defconfig
index c95fc0886bf..8bb13848a6a 100644
--- a/configs/am43xx_hs_evm_defconfig
+++ b/configs/am43xx_hs_evm_defconfig
@@ -15,6 +15,7 @@ CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE=0x01c00000
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL_TEXT_BASE=0x403018e0
 CONFIG_SPL=y
+CONFIG_SYS_MEM_TOP_HIDE=0x4000000
 CONFIG_SPL_LOAD_FIT=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_OF_BOARD_SETUP=y
diff --git a/configs/am43xx_hs_evm_qspi_defconfig b/configs/am43xx_hs_evm_qspi_defconfig
index cc444ac2817..9b4bc178ed0 100644
--- a/configs/am43xx_hs_evm_qspi_defconfig
+++ b/configs/am43xx_hs_evm_qspi_defconfig
@@ -14,6 +14,7 @@ CONFIG_TI_SECURE_EMIF_REGION_START=0xbdb00000
 CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE=0x02000000
 CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE=0x01c00000
 CONFIG_ENV_OFFSET_REDUND=0x120000
+CONFIG_SYS_MEM_TOP_HIDE=0x4000000
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_QSPI_BOOT=y
 CONFIG_BOOTCOMMAND="run findfdt; run finduuid; run distro_bootcmd"
diff --git a/include/configs/am43xx_evm.h b/include/configs/am43xx_evm.h
index 036995cbb48..99d3ecb3fff 100644
--- a/include/configs/am43xx_evm.h
+++ b/include/configs/am43xx_evm.h
@@ -148,9 +148,4 @@
 #define NANDBOOT
 #endif /* CONFIG_MTD_RAW_NAND */
 
-#if defined(CONFIG_TI_SECURE_DEVICE)
-/* Avoid relocating onto firewalled area at end of DRAM */
-#define CFG_PRAM (64 * 1024)
-#endif /* CONFIG_TI_SECURE_DEVICE */
-
 #endif	/* __CONFIG_AM43XX_EVM_H */
-- 
2.34.1