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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
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@ -462,6 +462,22 @@ config TPL_USE_ARCH_MEMSET
Such implementation may be faster under some conditions Such implementation may be faster under some conditions
but may increase the binary size. 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 config ARM64_SUPPORT_AARCH32
bool "ARM64 system support AArch32 execution state" bool "ARM64 system support AArch32 execution state"
depends on ARM64 depends on ARM64

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

1
include/configs/xilinx_versal.h
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@ -65,7 +65,6 @@
#define ENV_MEM_LAYOUT_SETTINGS \ #define ENV_MEM_LAYOUT_SETTINGS \
"fdt_high=10000000\0" \ "fdt_high=10000000\0" \
"initrd_high=10000000\0" \
"fdt_addr_r=0x40000000\0" \ "fdt_addr_r=0x40000000\0" \
"pxefile_addr_r=0x10000000\0" \ "pxefile_addr_r=0x10000000\0" \
"kernel_addr_r=0x18000000\0" \ "kernel_addr_r=0x18000000\0" \