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arm64: versal: Set initrd_high to as high as possible

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This patch is setting up the initrd_high to as high as possible by leaving
max stack size for u-boot so that bigger rootfs can also be loaded by
u-boot for booting kernel.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu 2019-08-05 23:28:30 +05:30 • committed by Michal Simek
parent 26e054c943
commit 085201c246
3 changed files with 22 additions and 1 deletions
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16
arch/arm/Kconfig
View file

@ -462,6 +462,22 @@ config TPL_USE_ARCH_MEMSET
Such implementation may be faster under some conditions
but may increase the binary size.
config SET_STACK_SIZE
bool "Enable an option to set max stack size that can be used"
default y if ARCH_VERSAL
help
This will enable an option to set max stack size that can be
used by u-boot.
config STACK_SIZE
hex "Define max stack size that can be used by u-boot"
depends on SET_STACK_SIZE
default 0x4000000 if ARCH_VERSAL
help
Defines Max stack size that can be used by u-boot so that the
initrd_high will be calculated as base stack pointer minus this
stack size.
config ARM64_SUPPORT_AARCH32
bool "ARM64 system support AArch32 execution state"
depends on ARM64

6
board/xilinx/versal/board.c
View file

@ -12,6 +12,7 @@
#include <dm/device.h>
#include <dm/uclass.h>
#include <versalpl.h>
#include <linux/sizes.h>
DECLARE_GLOBAL_DATA_PTR;
@ -88,6 +89,7 @@ int board_late_init(void)
const char *mode;
char *new_targets;
char *env_targets;
ulong initrd_hi;
if (!(gd->flags & GD_FLG_ENV_DEFAULT)) {
debug("Saved variables - Skipping\n");
@ -183,6 +185,10 @@ int board_late_init(void)
env_set("boot_targets", new_targets);
initrd_hi = gd->start_addr_sp - CONFIG_STACK_SIZE;
initrd_hi = round_down(initrd_hi, SZ_16M);
env_set_addr("initrd_high", (void *)initrd_hi);
return 0;
}

1
include/configs/xilinx_versal.h
View file

@ -65,7 +65,6 @@
#define ENV_MEM_LAYOUT_SETTINGS \
"fdt_high=10000000\0" \
"initrd_high=10000000\0" \
"fdt_addr_r=0x40000000\0" \
"pxefile_addr_r=0x10000000\0" \
"kernel_addr_r=0x18000000\0" \