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configs: am43xx: Migrate to CONFIG_SYS_MEM_TOP_HIDE from CFG_PRAM

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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@ti.com>
This commit is contained in:
Beleswar Padhi 2025-12-09 11:20:43 +05:30 committed by Tom Rini
parent 7da7ca7cf5
commit da54deb1ac
3 changed files with 2 additions and 5 deletions
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1
configs/am43xx_hs_evm_defconfig
View File

@ -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

1
configs/am43xx_hs_evm_qspi_defconfig
View File

@ -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"

5
include/configs/am43xx_evm.h
View File

@ -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 */