[PATCH v2] configs: am571x_hs_evm_defconfig: Reserve EMIF memory used by PPA

[Beleswar Padhi]

The AM571x SoC has 1 GB DDR space. As part of normal re-location process
U-Boot copies itself to the top of DDR bank. However, on HS devices, the
top 37 MB is used by PPA and is firewalled. This results in an exception
and the boot fails.

Introduce a new defconfig for AM571x HS platforms and set
CONFIG_SYS_MEM_TOP_HIDE to reserve the top 38 MB memory (aligned to 2MB
as per page size for ARM32) for the same.

Signed-off-by: Beleswar Padhi <b-padhi at ti.com>
---
Fix boot for TI AM571x HS EVM board
v2: Changelog:
1. Drop [PATCH v1 2/2] in v2 series. There is no need to add reserved
memory node in DT as it is done by U-Boot as part of FDT fixups
https://github.com/u-boot/u-boot/blob/master/arch/arm/mach-omap2/fdt-common.c#L72-L107
2. Add entry in MAINTAINERS for new config.
3. Update commit message to use memory size in MB than raw hex bytes

Link to v1:
https://lore.kernel.org/all/20251128064353.1295063-1-b-padhi@ti.com/

Test logs:
https://gist.github.com/3V3RYONE/e86b3f4551986b0400d0e0f66d6ecc66

 MAINTAINERS                     | 1 +
 configs/am571x_hs_evm_defconfig | 3 +++
 2 files changed, 4 insertions(+)
 create mode 100644 configs/am571x_hs_evm_defconfig

diff --git a/MAINTAINERS b/MAINTAINERS
index b43dae882b3..e5d564cd760 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1780,6 +1780,7 @@ F:	configs/am335x_hs_evm_spi_defconfig
 F:	configs/am335x_hs_evm_uart_defconfig
 F:	configs/am43xx_hs_evm_defconfig
 F:	configs/am43xx_hs_evm_qspi_defconfig
+F:	configs/am571x_hs_evm_defconfig
 F:	configs/am57xx_hs_evm_defconfig
 F:	configs/am57xx_hs_evm_usb_defconfig
 F:	configs/dra7xx_hs_evm_defconfig
diff --git a/configs/am571x_hs_evm_defconfig b/configs/am571x_hs_evm_defconfig
new file mode 100644
index 00000000000..7e44ee5221a
--- /dev/null
+++ b/configs/am571x_hs_evm_defconfig
@@ -0,0 +1,3 @@
+#include <configs/am57xx_hs_evm_defconfig>
+
+CONFIG_SYS_MEM_TOP_HIDE=0x2600000
-- 
2.34.1