[PATCH] xilinx: mbv: Update defconfigs as per memory map

[Michal Simek]

From: Padmarao Begari <padmarao.begari at amd.com>

U-Boot SPL should be executed from LMB BRAM, where its text
and data sections are located, while the heap and stack are
allocated in DDR memory.

Because on the MB-V platform, after power-up, reset, or FPGA
load, execution begins from LMB BRAM at address 0x0. Therefore,
the SPL binary must be placed in BRAM to support this boot flow.
Without it, the system can only be booted via JTAG.

A 64KB LMB BRAM region is allocated for U-Boot SPL, starting at
address 0x0. This region contains the SPL's text, data, and device
tree blob (DTB) sections. The .bss section is placed separately at
address 0xF000.

	_________________0xFFFF
	|BSS            |
	|_______________|0xF000
	|DTB            |
	|_______________|
	|Data           |
	|_______________|
	|Text           |
	|_______________|0x0000

A 2MB region of DDR memory is allocated for U-Boot SPL, with the
heap starting at address 0x80000000 and the stack at 0x80200000.

	_________________0xBFFFFFFF
	|Full U-Boot    |
	|_______________|0x80400000
	|Load FIT Image |
	|_______________|0x80200000
	|Stack          |
	|_______________|
	|Heap           |
	|_______________|0x80000000

Since LMB BRAM is a limited resource with a practical size
constraint of 64KB - it cannot accommodate all runtime data.
Therefore, the heap and stack are placed at the beginning of
DDR memory to ensure sufficient space for SPL execution.

Signed-off-by: Padmarao Begari <padmarao.begari at amd.com>
Signed-off-by: Michal Simek <michal.simek at amd.com>
---

 configs/xilinx_mbv32_defconfig | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/configs/xilinx_mbv32_defconfig b/configs/xilinx_mbv32_defconfig
index 9e3c44352a15..42dc5fb282ad 100644
--- a/configs/xilinx_mbv32_defconfig
+++ b/configs/xilinx_mbv32_defconfig
@@ -6,11 +6,12 @@ CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x81200000
 CONFIG_ENV_SIZE=0x20000
 CONFIG_DEFAULT_DEVICE_TREE="xilinx-mbv32"
 CONFIG_SPL_STACK=0x80200000
-CONFIG_SPL_BSS_START_ADDR=0x84000000
-CONFIG_SPL_BSS_MAX_SIZE=0x80000
+CONFIG_SPL_TEXT_BASE=0x0
+CONFIG_SPL_BSS_START_ADDR=0xf000
+CONFIG_SPL_BSS_MAX_SIZE=0x1000
 CONFIG_SYS_BOOTM_LEN=0x800000
 CONFIG_SYS_LOAD_ADDR=0x80200000
-CONFIG_SPL_SIZE_LIMIT=0x40000
+CONFIG_SPL_SIZE_LIMIT=0x10000
 CONFIG_SPL=y
 CONFIG_SYS_CLK_FREQ=100000000
 CONFIG_BOOT_SCRIPT_OFFSET=0x0
@@ -25,10 +26,13 @@ CONFIG_DISPLAY_CPUINFO=y
 CONFIG_DISPLAY_BOARDINFO=y
 # CONFIG_BOARD_INIT is not set
 # CONFIG_BOARD_LATE_INIT is not set
-CONFIG_SPL_MAX_SIZE=0x40000
+CONFIG_SPL_MAX_SIZE=0xf000
 # CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
 CONFIG_SPL_HAVE_INIT_STACK=y
 CONFIG_SPL_SYS_MALLOC=y
+CONFIG_SPL_HAS_CUSTOM_MALLOC_START=y
+CONFIG_SPL_CUSTOM_SYS_MALLOC_ADDR=0x80000000
+CONFIG_SPL_SYS_MALLOC_SIZE=0x200000
 # CONFIG_CMD_MII is not set
 CONFIG_CMD_SNTP=y
 CONFIG_CMD_TIMER=y
-- 
2.43.0

base-commit: 6cf68b9fba56781b3a7b1c2976aec4d2c71bebc1
branch: debian-sent3