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examples: eliminate CONFIG_STANDALONE_LOAD_ADDR

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CONFIG_STANDALONE_LOAD_ADDR has been used for examples/standalone
but not for examples/api.

The suitability of an address to load an ELF binary and run it does
not only depend on the architecture but also on the memory layout of
the board which is not reflected in the default value of
CONFIG_STANDALONE_LOAD_ADDR.

Commit 32b7e39db4 ("Convert CONFIG_STANDALONE_LOAD_ADDR to Kconfig")
set the default on RISC-V to 0x0 though most boards used 0x80200000
before the patch.

On most boards we can assume 8 MiB of memory available above $loadaddr.
So we can safely use $loadaddr + 4 MiB as load address for the standalone
example and eliminate CONFIG_STANDALONE_LOAD_ADDR altogether.

Fixes: 32b7e39db4 ("Convert CONFIG_STANDALONE_LOAD_ADDR to Kconfig")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2025-01-27 08:18:46 +01:00 • committed by Tom Rini
parent 1df9cbd70f
commit 72bbb645b3
3 changed files with 5 additions and 22 deletions
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20
api/Kconfig
View file

@ -19,24 +19,4 @@ config EXAMPLES
U-Boot provides an API for standalone applications. Examples are
provided in directory examples/.
config STANDALONE_LOAD_ADDR
depends on EXAMPLES
hex "Address in memory to link standalone applications to"
default 0xffffffff80200000 if MIPS && 64BIT
default 0x8c000000 if SH
default 0x82000000 if ARC
default 0x80f00000 if MICROBLAZE
default 0x80300000 if ARCH_OMAP2PLUS || FSL_LSCH2 || FSL_LSCH3
default 0x80200000 if MIPS && 32BIT
default 0x0c100000 if ARM
default 0x02000000 if NIOS2
default 0x00040000 if PPC || X86
default 0x00020000 if M68K
default 0x0 if RISCV
default SYS_LOAD_ADDR
help
This option defines a board specific value for the address where
standalone program gets loaded, thus overwriting the architecture
dependent default settings.
endmenu

1
config.mk
View file

@ -76,4 +76,3 @@ export PLATFORM_CPPFLAGS
export RELFLAGS
export LDFLAGS_FINAL
export LDFLAGS_STANDALONE
export CONFIG_STANDALONE_LOAD_ADDR

6
examples/standalone/Makefile
View file

@ -7,6 +7,10 @@ extra-y := hello_world
extra-$(CONFIG_SPI_FLASH_ATMEL) += atmel_df_pow2
extra-$(CONFIG_PPC) += sched
# Environment variable loadaddr is set from CONFIG_SYS_LOAD_ADDR.
# Run the examples 4 MiB above this address.
LOAD_ADDR:=${shell printf 0x%X $$(( $(CONFIG_SYS_LOAD_ADDR) + 0x400000 ))}
#
# Some versions of make do not handle trailing white spaces properly;
# leading to build failures. The problem was found with GNU Make 3.80.
@ -46,7 +50,7 @@ endif
# source file.
ccflags-y += $(call cc-option,-fno-toplevel-reorder)
LDFLAGS_STANDALONE += -Ttext $(CONFIG_STANDALONE_LOAD_ADDR)
LDFLAGS_STANDALONE += -Ttext $(LOAD_ADDR)
#########################################################################