configs: am62: move stack and heap to HSM RAM

On high security devices, ROM enables firewalls to protect the OCSRAM
region access during bootup. Only after TIFS has started (and had
time to disable the OCSRAM firewall region) will we have write access to
the region.

This means we will need to move the stack & heap from OCSRAM to HSM RAM
and reduce the size of BSS and the SPL to allow it to fit properly.

To protect us from overflowing our ~256k of HSM SRAM, add limits and
check during the wakeup SPL build.

Signed-off-by: Kamlesh Gurudasani <kamlesh@ti.com>

configs/am62x_evm_r5_defconfig

@@ -8,7 +8,7 @@ CONFIG_NR_DRAM_BANKS=2
 CONFIG_SOC_K3_AM625=y
 CONFIG_TARGET_AM625_R5_EVM=y
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
-CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x7000ffff
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x43c3a7f0
 CONFIG_ENV_SIZE=0x20000
 CONFIG_DM_GPIO=y
 CONFIG_SPL_DM_SPI=y
@@ -19,7 +19,9 @@ CONFIG_SPL_MMC=y
 CONFIG_SPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL_STACK_R_ADDR=0x82000000
-CONFIG_SPL_SIZE_LIMIT=0x40000
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x7000
+CONFIG_SPL_SIZE_LIMIT=0x3A7F0
+CONFIG_SPL_SIZE_LIMIT_PROVIDE_STACK=0x3500
 CONFIG_SPL_FS_FAT=y
 CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
@@ -28,10 +30,14 @@ CONFIG_SPL_LOAD_FIT=y
 CONFIG_SPL_LOAD_FIT_ADDRESS=0x80080000
 CONFIG_SPL_FIT_IMAGE_POST_PROCESS=y
 # CONFIG_DISPLAY_CPUINFO is not set
-CONFIG_SPL_MAX_SIZE=0x58000
+CONFIG_SPL_SIZE_LIMIT_SUBTRACT_GD=y
+CONFIG_SPL_SIZE_LIMIT_SUBTRACT_MALLOC=y
+CONFIG_SPL_MAX_SIZE=0x3B000
+CONFIG_SPL_PAD_TO=0x0
 CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
-CONFIG_SPL_BSS_START_ADDR=0x43c37800
-CONFIG_SPL_BSS_MAX_SIZE=0x5000
+CONFIG_SPL_BSS_START_ADDR=0x43c3b000
+CONFIG_SPL_BSS_MAX_SIZE=0x3000
+CONFIG_SPL_SYS_REPORT_STACK_F_USAGE=y
 CONFIG_SPL_SYS_MALLOC_SIMPLE=y
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_SEPARATE_BSS=y