arm64: versal: Fix LTO for mini_ospi/mini_qspi

With LTO enabled, mini U-Boot was hanging during reloc_fdt().
The initial stack pointer was placed too low, and the FDT memcpy
destination was carved only 4KB above it. This left insufficient
margin, causing the FDT copy to overwrite the live early stack
and corrupt execution before relocation.

To fix this, increase the malloc heap from 8KB to 12KB and raise the
initial stack pointer by 4KB. Together these adjustments increase
the separation between the early stack and the FDT region during
the pre-relocation phase, eliminating the overlap and fixing the
hang on mini builds (QSPI/OSPI).

Signed-off-by: Pranav Tilak <pranav.vinaytilak@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>

diff --git a/configs/xilinx_versal_mini_ospi_defconfig b/configs/xilinx_versal_mini_ospi_defconfig
index 11811f3..eb101d0 100644 (file)
--- a/configs/xilinx_versal_mini_ospi_defconfig
+++ b/configs/xilinx_versal_mini_ospi_defconfig
@@ -3,11 +3,11 @@ CONFIG_SYS_CONFIG_NAME="xilinx_versal_mini"
 CONFIG_COUNTER_FREQUENCY=100000000
 CONFIG_ARCH_VERSAL=y
 CONFIG_TEXT_BASE=0xFFFC0000
-CONFIG_SYS_MALLOC_LEN=0x2000
+CONFIG_SYS_MALLOC_LEN=0x3000
 CONFIG_SYS_MALLOC_F_LEN=0x500
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
-CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xFFFE1000
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xFFFE2000
 CONFIG_SF_DEFAULT_SPEED=30000000
 CONFIG_ENV_SIZE=0x80
 # CONFIG_DM_GPIO is not set

diff --git a/configs/xilinx_versal_mini_qspi_defconfig b/configs/xilinx_versal_mini_qspi_defconfig
index 47737ce..20fab69 100644 (file)
--- a/configs/xilinx_versal_mini_qspi_defconfig
+++ b/configs/xilinx_versal_mini_qspi_defconfig
@@ -3,10 +3,10 @@ CONFIG_SYS_CONFIG_NAME="xilinx_versal_mini"
 CONFIG_COUNTER_FREQUENCY=100000000
 CONFIG_ARCH_VERSAL=y
 CONFIG_TEXT_BASE=0xFFFC0000
-CONFIG_SYS_MALLOC_LEN=0x2000
+CONFIG_SYS_MALLOC_LEN=0x3000
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
-CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xFFFE0000
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xFFFE2000
 CONFIG_SF_DEFAULT_SPEED=30000000
 CONFIG_ENV_SIZE=0x80
 CONFIG_DEFAULT_DEVICE_TREE="versal-mini-qspi-single"