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| author | T Karthik Reddy <t.karthik.reddy@xilinx.com> | 2021-05-11 23:39:16 -0600 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2021-05-19 09:44:50 +0200 |
| commit | 2a6e6c81f454d44c940203051f72991eece5bf51 (patch) | |
| tree | 80d3b8df92f5c9ec94dd31d910340fffd301a87b | |
| parent | a502a87bc0e96a6b867cb9ed906c5a1d64444769 (diff) | |
xilinx: versal: Enable CONFIG_POSITION_INDEPENDENT
U-Boot expects to be linked to a specific hard-coded address and to
be loaded to and run from that address. CONFIG_POSITION_INDEPENDENT
config lifts that restriction & allowing the code to be loaded to
and executed from almost any address.
As we enabled CONFIG_POSITION_INDEPENDENT, CONFIG_INIT_SP_RELATIVE
is enabled by default, where it will set the early stack pointer at
runtime by adding an offset value to &_bss_start. The offset value
is taken from SYS_INIT_SP_BSS_OFFSET.
SYS_INIT_SP_BSS_OFFSET offset should be large enough so that the
early malloc region, global data (gd), and early stack should fit.
With commit d8fabcc424bd ("arm64: versal: Increase SYS_MALLOC_F_LEN")
SYS_MALLOC_F_LEN is increased from 32KB to 1MB, so we need to
accommodate this space with SYS_INIT_SP_BSS_OFFSET. Hence increasing
SYS_INIT_SP_BSS_OFFSET to 1.5MB.
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Acked-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
| -rw-r--r-- | configs/xilinx_versal_virt_defconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig index 707693713a..f4e9a80728 100644 --- a/configs/xilinx_versal_virt_defconfig +++ b/configs/xilinx_versal_virt_defconfig @@ -1,5 +1,6 @@ CONFIG_ARM=y CONFIG_POSITION_INDEPENDENT=y +CONFIG_SYS_INIT_SP_BSS_OFFSET=1572864 CONFIG_ARCH_VERSAL=y CONFIG_SYS_TEXT_BASE=0x8000000 CONFIG_SYS_MALLOC_F_LEN=0x100000 |