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2018-10-03riscv: Move do_reset() to a common placeBin Meng
We don't have a reset method on any RISC-V board yet. Instead of adding the same 'unsupported' message for each CPU variant it might make more sense to add a generic do_reset function for all CPU variants to lib/, similar to the one for ARM (arch/arm/lib/reset.c). Suggested-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: Add QEMU virt board supportBin Meng
This adds QEMU RISC-V 'virt' board target support, with the hope of helping people easily test U-Boot on RISC-V. The QEMU virt machine models a generic RISC-V virtual machine with support for the VirtIO standard networking and block storage devices. It has CLINT, PLIC, 16550A UART devices in addition to VirtIO and it also uses device-tree to pass configuration information to guest software. It implements RISC-V privileged architecture spec v1.10. Both 32-bit and 64-bit builds are supported. Support is pretty much preliminary, only booting to U-Boot shell with the UART driver on a single core. Booting Linux is not supported yet. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: ae350: Clean up mixed tabs and spaces in the dtsBin Meng
There are quite a lot of mixed tabs and spaces in the ae350.dts. Clean them up. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: Make start.S available for all targetsBin Meng
Currently start.S is inside arch/riscv/cpu/ax25/, but it can be common for all RISC-V targets. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: bootm: Pass mhartid CSR value to kernelBin Meng
So far this is hardcoded to zero, and we should read the value from mhartid CSR and pass it to Linux kernel. Suggested-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Rick Chen <rick@andestech.com>
2018-10-03riscv: Remove CSR read/write defines in encoding.hBin Meng
There is no reason to keep two versions of CSR read/write defines in encoding.h. We already have one set of defines in csr.h, which is from Linux kernel, and let's drop the one in encoding.h. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Rick Chen <rick@andestech.com>
2018-10-03riscv: Add a helper routine to print CPU informationBin Meng
This adds a helper routine to print CPU information. Currently it prints all the instruction set extensions that the processor core supports. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: Explicitly pass -march and -mabi to the compilerBin Meng
At present the compiler flag against which architecture and abi variant the riscv image is built for is not explicitly indicated which means the default compiler configuration is used. But this does not work if we want to build a different target (eg: 32-bit riscv images using a toolchain configured for 64-bit riscv). Fix this by explicitly passing -march and -mabi to the compiler. Since generically we don't use floating point in U-Boot, specify the RV[32|64]IMA ISA and software floating ABI. This also fix some alignment coding style issues. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: Fix coding style issues in the linker scriptBin Meng
There are several coding style issues in the linker script. Fix them. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: Move the linker script to the CPU root directoryBin Meng
The linker script can be shared by all RISC-V targets. Move it to a common place. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: Remove mach typeBin Meng
Since the mach_id is not used by RISC-V, remove it. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: bootm: Correct the 1st kernel argument to hart idBin Meng
The first argument of Linux kernel is the risc-v core hart id, from which the kernel is booted from. It is not the mach_id, which seems to be copied from arm. While we are here, this also changes the Linux kernel entry parameters' type to support both 32-bit and 64-bit. Note the hart id is hardcoded to zero for now, and we should change to fill in it with the value read from mhartid CSR of the hart which this routine is currently running on. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Rick Chen <rick@andestech.com>
2018-10-03riscv: Remove setup.hBin Meng
This was copied from ARM, and does not apply to RISC-V. While we are here, bootm.h is eventually removed as its content is only the inclusion of setup.h. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2018-10-03riscv: kconfig: Normalize architecture name spellingBin Meng
It's RISC-V that is the official name, not RISCV. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Reviewed-by: Rick Chen <rick@andestech.com>
2018-09-25config.mk: Remove duplicated -fno-strict-aliasingBin Meng
Now that we already disable the "strict-aliasing" globally, remove the duplicates in the nds32/riscv/x86 arch-specific Makefiles. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Rick Chen <rick@andestech.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-09-10arch: types.h: factor out fixed width typedefs to int-ll64.hMasahiro Yamada
All architectures have the same definition for s8/16/32/64 and u8/16/32/64. Factor out the duplicated code into <asm-generic/int-ll64.h>. BTW, Linux unified the kernel space definition into int-ll64.h a few years ago as you see in Linux commit 0c79a8e29b5f ("asm/types.h: Remove include/asm-generic/int-l64.h"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-08-20riscv: Include bss subsections in linker scriptAlexander Graf
When we build with -fdata-sections we may end up with bss subsections. Our linker script explicitly lists only a single consecutive bss section though. Adapt the statement to also include subsections. Signed-off-by: Alexander Graf <agraf@suse.de>
2018-07-25efi_loader: Rename sections to allow for implicit dataAlexander Graf
Some times gcc may generate data that is then used within code that may be part of an efi runtime section. That data could be jump tables, constants or strings. In order to make sure we catch these, we need to ensure that gcc emits them into a section that we can relocate together with all the other efi runtime bits. This only works if the -ffunction-sections and -fdata-sections flags are passed and the efi runtime functions are in a section that starts with ".text". Up to now we had all efi runtime bits in sections that did not interfere with the normal section naming scheme, but this forces us to do so. Hence we need to move the efi_loader text/data/rodata sections before the global *(.text*) catch-all section. With this patch in place, we should hopefully have an easier time to extend the efi runtime functionality in the future. Signed-off-by: Alexander Graf <agraf@suse.de> [agraf: Fix x86_64 breakage]
2018-07-19riscv: Remove unused _relocate argumentsIvan Gorinov
EFI image handle and system table are not used in _relocate(). Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com>
2018-05-29riscv: dts: Support cfi flashRick Chen
Add nor node for cfi-flash driver and smc node for smc(aftsmc020) controller. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Cc: Greentime Hu <green.hu@gmail.com>
2018-05-29riscv: dts: Sync DT with Linux KernelRick Chen
Use same dts to boot U-Boot and RISC-V Linux Kernel v4.16-rc2 in ax25-ae350 platform. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Cc: Greentime Hu <green.hu@gmail.com>
2018-05-29riscv: cpu: nx25: Rename as ax25Rick Chen
Andes has rearranged the product combinations. nx25 and ax25 both are RISC-V architecture cpu core. But ax25 has MMU unit inside, and nx25 is not. Cpu nx25 and platform ae250 are arranged in pairs. Cpu ax25 and platform ae350 are arranged in pairs. This patch will rename nx25 as ax25 ae250 as ae350 nx25-ae250 as ax25-ae350 including filename, variable, string and definition. Then u-boot can boot linux kernel in ae350 platform reasonably. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Cc: Greentime Hu <green.hu@gmail.com>
2018-05-29SPDX: Convert single license tags to Linux Kernel styleRick Chen
Fix license tags problem after apply patchs about riscv: Enable efi_loader support. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Cc: Greentime Hu <green.hu@gmail.com>
2018-05-29efi_loader: Enable RISC-V supportRick Chen
We have almost all pieces needed to support RISC-V UEFI binaries in place already. The only missing piece are ELF relocations for runtime code and data. This patch adds respective support in the linker script and the runtime relocation code. It also allows users to enable the EFI_LOADER configuration switch on RISC-V platforms. Signed-off-by: Alexander Graf <agraf@suse.de>
2018-05-29riscv: Add board_quiesce_devices stubAlexander Graf
This patch adds an empty stub for board_quiesce_devices() which allows boards to quiesce their devices before we boot into an OS in a platform agnostic way. Signed-off-by: Alexander Graf <agraf@suse.de>
2018-05-29riscv: Add EFI application infrastructureAlexander Graf
The hello world binary and a few selftests require to build EFI target binaries, not just the EFI host environment. This patch adds all required files to generate an EFI binary for RISC-V. Signed-off-by: Alexander Graf <agraf@suse.de>
2018-05-29riscv: Enable function sectionsAlexander Graf
The linker can remove sections that are never addressed, so it makes a lot of sense to declare every function as an individual section. This reduces the output U-Boot code size by ~30kb for me. Signed-off-by: Alexander Graf <agraf@suse.de>
2018-05-29riscv: Add setjmp/longjmp codeAlexander Graf
To support efi_loader we need to have platform support for setjmp/longjmp. Add it here. Signed-off-by: Alexander Graf <agraf@suse.de>
2018-05-15riscv: Define PLATFORM__CLEAR_BIT for generic_clear_bit()Bryan O'Donoghue
riscv bitops.h provides a __clear_bit() but does not define PLATFORM__CLEAR_BIT as a result generic_clear_bit() is used instead of the architecturally provided __clear_bit(). This patch defines PLATFORM__CLEAR_BIT which means that __clear_bit() in riscv bitops.h will be called whenever generic_clear_bit() is called - as opposed to the default cross-platform generic_clear_bit(). Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Cc: Rick Chen <rick@andestech.com> Cc: Greentime Hu <green.hu@gmail.com>
2018-05-15riscv: Define PLATFORM__SET_BIT for generic_set_bit()Bryan O'Donoghue
riscv bitops.h provides a __set_bit() but does not define PLATFORM__SET_BIT as a result generic_set_bit() is used instead of the architecturally provided __set_bit(). This patch defines PLATFORM__SET_BIT which means that __set_bit() in x86 bitops.h will be called whenever generic_set_bit() is called - as opposed to the default cross-platform generic_set_bit(). Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Cc: Rick Chen <rick@andestech.com> Cc: Greentime Hu <green.hu@gmail.com>
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-04-27Remove unnecessary instances of DECLARE_GLOBAL_DATA_PTRTom Rini
We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-03-30riscv: ae250: Support DT provided by the board at runtimeRick Chen
Enable CONFIG_OF_BOAD to support delivery dtb to u-boot at run time instead of embedded. There are two methods to delivery dtb. 1 Pass from loader: When u-boot boot from RAM, gdb or loader can pass dtb via a2 to u-boot dynamically. Of course gdb or loader shall be in charge of dtb delivery. 2 Configure CONFIG_SYS_FDT_BASE: It can be configured as RAM or ROM base statically, no mater u-boot boot from RAM or ROM. If it was configured as ROM base, dtb can be burned into ROM(spi flash) by spi driver. Meanwhile remove CONFIG_SKIP_LOWLEVEL_INIT which is useless in nx25-ae250 configuration. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Cc: Greentime Hu <green.hu@gmail.com>
2018-03-30riscv: dts: AE250 support sd High-Speed modeRick Chen
Enable High-Speed mode with cap-sd-highspeed in dts. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-03-30riscv: bootm: Remove ATAGSRick Chen
ATAGS is not supported and will be replaced by DT in riscv-linux. So can be removed now. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-03-30riscv: bootm: Support to boot riscv-linuxRick Chen
riscv-linux should use BBL (Berkeley bootloader) for loading the Linux kernel. U-Boot can play as FSBL(first stage bootloader) to boot BBL and riscv-linux. In BBL's init_first_hart(), it will pass dtb with a1. So implement bootm to pass arguments to BBL correctly. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-03-30riscv: checkpatch: Fix static const char * array declarationsRick Chen
It is reported by checkpatch.pl WARNING: static const char * array should probably be static const char * const Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-03-30riscv: checkpatch: Fix missing a blank line after declarationsRick Chen
It is reported by checkpatch.pl WARNING: Missing a blank line after declarations. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-03-30riscv: checkpatch: Fix alignment should match open parenthesisRick Chen
It is reported by checkpatch.pl. CHECK: Alignment should match open parenthesis Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-03-30riscv: checkpatch: Fix use of volatileRick Chen
It is reported by checkpatch.pl WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-03-30riscv: checkpatch: Fix Macro argument reuseRick Chen
It is CHECK reported by checkpatch.pl CHECK: Macro argument reuse 'PTE' - possible side-effects? Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com>
2018-01-12riscv: Add Kconfig to support RISC-VRick Chen
Add Kconfig and makefile for RISC-V Also modify MAINTAINERS for it. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Signed-off-by: Greentime Hu <green.hu@gmail.com> Cc: Padmarao Begari <Padmarao.Begari@microsemi.com>
2018-01-12riscv: nx25: include: Add header files to support RISC-VRick Chen
Add header files for RISC-V. Cache, ptregs, data type and other definitions are included. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Signed-off-by: Greentime Hu <green.hu@gmail.com>
2018-01-12riscv: nx25: dts: Add AE250 dts to support RISC-VRick Chen
AE250 is the Soc using NX25 cpu core base on RISC-V arch. Details please see the doc/README.ae250. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Signed-off-by: Greentime Hu <green.hu@gmail.com>
2018-01-12riscv: nx25: lib: Add relative lib funcs to support RISC-VRick Chen
Add makefile, interrupts.c and boot.c,... functions to support RISC-V arch. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Signed-off-by: Greentime Hu <green.hu@gmail.com> Cc: Padmarao Begari <Padmarao.Begari@microsemi.com>
2018-01-12riscv: cpu: Add nx25 to support RISC-VRick Chen
Add Andes nx25 cpu core (called AndesStar V5) to support RISC-V arch Verifications: 1. startup and relocation ok. 2. boot from rom or ram both ok. 2. timer driver ok. 3. uart driver ok 4. mmc driver ok 5. spi driver ok. 6. 32/64 bit both ok. Detail verification message please see doc/README.ae250. Signed-off-by: Rick Chen <rick@andestech.com> Signed-off-by: Rick Chen <rickchen36@gmail.com> Signed-off-by: Greentime Hu <green.hu@gmail.com> Cc: Padmarao Begari <Padmarao.Begari@microsemi.com>
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