arc: significant cache rework [1] Align cache management functions to those in Linux kernel. I.e.: a) Use the same functions for all cache ops (D$ Inv/Flush) b) Split cache ops in 3 sub-functions: "before", "lineloop" and "after". That way we may re-use "before" and "after" functions for region and full cache ops. [2] Implement full-functional L2 (SLC) management. Before SLC was simply disabled early on boot. It's also possible to enable or disable L2 cache from config utility. [3] Disable/enable corresponding caches early on boot. So if U-Boot is configured to use caches they will be used at all times (this is useful in partucular for speed-up of relocation). Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: implement slave cores kick-start for Linux kernel With new SMP-enabled CPUs with ARC HS38 cores and corresponding support in Linux kernel it's required to add basic SMP support in U-Boot. Currently we assume the one and only core starts execution after power-on. So most of things in U-Boot is handled in UP mode. But when U-Boot is used for loading and starting Linux kernel right before jumping to kernel's entry point U-Boot: [1] Sets all slave cores to jump to the same address [kernel's entry point] [2] Really starts all slav cores In ARC's implemetation of SMP in Linux kernel all cores are supposed to run the same start-up code. But only core with ID 0 (master core) processes further while others are looping waiting for master core to complete some initialization. That means it's safe to un-pause slave cores and let them execute kernel - they will wait for master anyway. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Vineet Gupta <vgupta@synopsys.com>
Move default y configs out of arch/board Kconfig Some archs/boards specify their own default by pre-defining the config which causes the Kconfig system to mix up the order of the configs in the defconfigs... This will cause merge pain if allowed to proliferate. Remove the configs that behave this way from the archs. A few configs still remain, but that is because they only exist as defaults and do not have a proper Kconfig entry. Those appear to be: SPIFLASH DISPLAY_BOARDINFO Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> [trini: rastaban, am43xx_evm_usbhost_boot, am43xx_evm_ethboot updates, drop DM_USB from MSI_Primo81 as USB_MUSB_SUNXI isn't converted yet to DM] Signed-off-by: Tom Rini <trini@konsulko.com>
arc: remove dummy target TARGET_DUMMY was introduced to resolve the same problem as commit "arch: Make board selection choices optional" http://git.denx.de/?p=u-boot.git;a=commit;h=a26cd04920dc069fd6e91abb785426cf6c29f45f Latter implementation is much cleaner and appropriate. And anyways TARGET_DUMMY is no longer required. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
arc: use more universal prefix for default CROSS_COMPILE As doc/README.ARC says, pre-build ARC toolchains are available at the Synopsys GitHub page. The bin files are prefixed with arc(eb)-buildroot-linux- for earlier releases, but with arc(eb)-snps-linux- for the latest releases. The symbolic links prefixed with arc(eb)-linux- are also available for all the release, so those prefixes can be used as the default CROSS_COMPILE regardless of the toolchains version/variants. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
arch: Make board selection choices optional By making the board selections optional, every defconfig will include the board selection when running savedefconfig so if a new board is added to the top of the list of choices the former top's defconfig will still be correct. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Cc: Tom Rini <trini@konsulko.com>
generic-board: select SYS_GENERIC_BOARD for some architectures We have done with the generic board conversion for all the boards of ARC, Blackfin, M68000, MicroBlaze, MIPS, NIOS2, Sandbox, X86. Let's select SYS_GENERIC_BOARD for those architectures, so we can tell which architecture has finished the conversion at a glance. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: fix separate compilation of start.o While testing "arc: make sure _start is in the beginning of .text section" I haven't done proper clean-up of built binaries and so missed another tiny bit that lead to the following error: --->8--- LD u-boot arc-linux-ld.bfd: cannot find arch/arc/lib/start.o Makefile:1107: recipe for target 'u-boot' failed make: *** [u-boot] Error 1 --->8--- Fix is trivial: put "start.o" in "extra-y". Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: make sure _start is in the beginning of .text section This is important to have entry point in the beginning of .text section because it allows simple loading and execution of U-Boot. For example pre-bootloader loads U-Boot in memory starting from offset 0x81000000 and then just jumps to the same address. Otherwise pre-bootloader would need to find-out where entry-point is. In its turn if it deals with binary image of U-Boot there's no way for pre-bootloader to get required value. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: add support for SLC (System Level Cache, AKA L2-cache) ARCv2 cores may have built-in SLC (System Level Cache, AKA L2-cache). This change adds functions required for controlling SLC: * slc_enable/disable * slc_flush/invalidate For now we just disable SLC to escape DMA coherency issues until either: * SLC flush/invalidate is supported in DMA APIin U-Boot * hardware DMA coherency is implemented (that might be board specific so probably we'll need to have a separate Kconfig option for controlling SLC explicitly) Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
serial-arc: switch to DM Now when all infrastructure in ARC is ready for it let's switch ARC UART to driver model. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Simon Glass <sjg@chromium.org>
arc: minor fixes in Kconfig [1] Fix misspeling in ARC_CACHE_LINE_SHIFT dependency, now cache-line lenth selection is correctly enabled if either I$ or D$ are enabled. [2] Add dummy entry to target list to make sure target type is always mentioned in defconfig. Otherwise defconfig for the first target in the list will not have target name and later on with addition of the new target on top of the list in Kconfig will lead to corrupted configuration expanded from defconfig. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: get rid of CONFIG_SYS_GENERIC_GLOBAL_DATA As discussed on mailing list we're drifting away from CONFIG_SYS_GENERIC_GLOBAL_DATA in favour to use of board_init_f_mem() for global data. So do this for ARC architecture. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: clean-up init procedure Intention behind this work was elimination of as much assembly-written code as it is possible. In case of ARC we already have relocation fix-up implemented in C so why don't we use C for U-Boot copying, .bss zeroing etc. It turned out x86 uses pretty similar approach so we re-used parts of code in "board_f.c" initially implemented for x86. Now assembly usage during init is limited to stack- and frame-pointer setup before and after relocation. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Simon Glass <sjg@chromium.org>
arc: move low-level interrupt and exception handlers in a separate file This separation makes maintenance of code easier because those low-level interrupt- or exception handling routines are pretty static and usually require not much care while start-up code is a subject of modifications and enhancements. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: merge common start-up code between ARC and ARCv2 Even though ARCompact and ARCv2 are not binary compatible most of assembly instructions are used in both. With this change we'll get rid of duplicate code. Still IVTs are implemented differently so we're keeping them in separate files. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
arc: cache - build invalidate_icache_all() and invalidate_dcache_all() always Make both invalidate_icache_all() and invalidate_dcache_all() available even if U-Boot is configured with CONFIG_SYS_DCACHE_OFF and/or CONFIG_SYS_ICACHE_OFF. This is useful because configuration of U-Boot may not match actual hardware features. Real board may have cache(s) but for some reason we may want to run U-Boot with cache(s) disabled (for example if some peripherals work improperly with existing drivers if data cache is enabled). So board may start with cache(s) enabled (that's the case for ARC cores with built-in caches) but early in U-Boot we disable cache(s) and make sure all contents of data cache gets flushed in RAM. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>