I found that in some cases, initialized global variables don't work with user libraries, so a little change to the linker that I use, taken from the demo file, seems to solve the problem . I think that make more sense to put the global variables in sram and initial values in the main_ram, similar to the bios linker.
On slow configurations (ex iCEBreaker / SERV CPU / 12MHz SPI Flash freq) memspeed test was
too slow (>200s to do the random test for 1MB), so reduce test size to 4KB.
This will be less accurate but will still provide representative results which
is the aim of this test.
Integration from #1024 was working on some boards (ex Arty) but breaking others (ex iCEBreaker);
simplify things for now:
- Avoid duplication in spiflash_freq_init.
- Avoid passing useless SPIFLASH_LEGACY flag to software (software can detect it from csr.h).
- Only keep integration support for "legacy" PHY, others are not generic enough and can be passed with phy parameter.
litex_sim: SoC without RAM/SDRAM.
litex_sim --integrated-main-ram-size=0x1000: SoC with RAM of size 0x1000.
litex_sim --with-sdram: SoC with SDRAM.
litex_sim --integrated-main-ram-size=0x1000 --with-sdram: SoC with RAM (priority to RAM over SDRAM).
Inside the litex add_spi_flash function
we are detecting the devices that can't be used with
more efficient DDR version of litespi phy core
and we are choosing whether to instantiate the legacy or DDR core
When building with GCC 11:
../libbase/crt0.o: in function `_start':
litex/soc/cores/cpu/microwatt/crt0.S:54:(.text+0x38): relocation truncated to fit: R_PPC64_GOT16_DS against symbol `_fdata' defined in .data section in bios.elf
litex/soc/cores/cpu/microwatt/crt0.S:55:(.text+0x3c): relocation truncated to fit: R_PPC64_GOT16_DS against symbol `_edata' defined in .data section in bios.elf
litex/soc/cores/cpu/microwatt/crt0.S:56:(.text+0x40): relocation truncated to fit: R_PPC64_GOT16_DS against symbol `_fdata_rom' defined in *ABS* section in bios.elf
litex/soc/cores/cpu/microwatt/crt0.S:68:(.text+0x68): relocation truncated to fit: R_PPC64_GOT16_DS against symbol `_fbss' defined in .bss section in bios.elf
litex/soc/cores/cpu/microwatt/crt0.S:69:(.text+0x6c): relocation truncated to fit: R_PPC64_GOT16_DS against symbol `_ebss' defined in .bss section in bios.elf
litex/soc/cores/cpu/microwatt/crt0.S:80:(.text+0x90): relocation truncated to fit: R_PPC64_GOT16_DS against symbol `_fstack' defined in .bss section in bios.elf
boot.o: in function `copy_file_from_sdcard_to_ram':
litex/soc/software/bios/boot.c:622:(.text+0x18): relocation truncated to fit: R_PPC64_TOC16_DS against `.toc'
litex/soc/software/bios/boot.c:627:(.text+0x5c): relocation truncated to fit: R_PPC64_TOC16_DS against `.toc'+8
litex/soc/software/bios/boot.c:633:(.text+0x8c): relocation truncated to fit: R_PPC64_TOC16_DS against `.toc'+10
litex/soc/software/bios/boot.c:639:(.text+0xdc): relocation truncated to fit: R_PPC64_TOC16_DS against `.toc'+18
litex/soc/software/bios/boot.c:650:(.text+0x128): additional relocation overflows omitted from the output
This is because we pass -mcmodel=small. As the PowerPC ELF ABI
describes, the small code model restricts the relocations to 16-bit
offsets[1]. If we omit the option we get the default, which is the
medium model allowing 32-bit offsets.
http://openpowerfoundation.org/wp-content/uploads/resources/leabi/content/dbdoclet.50655240_19143.html
Signed-off-by: Joel Stanley <joel@jms.id.au>
New version of binutils contain stricter checks for sections that are
not included in the linker script, resulting in this error:
ld: error: no memory region specified for loadable section `.note.gnu.build-id'
Disable this feature as there is no use for it on bare metal systems.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Florent Kermarrec
George Hilliard
Camilo Andres Vera Ruiz
Nathaniel R. Lewis
wuhanstudio
Tim Ansell
Pawel Sagan
Piotr Binkowski
Tim Callahan
Joel Stanley