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2019-08-03riscv: add support for OpenSBIXiang Wang
Call OpenSBI in M-Mode and use it to set up SBI and to lockdown the platform. It will also jump to the specified payload when done. This behaviour is similar to BL31 on aarch31. The payload is 41KiB in size on qemu. Tested on qemu-riscv: Required to boot a kernel as OpenSBI's instruction emulation feature is required on that virtual machine. Tested on SiFive/unleashed: The earlycon is working. No console after regular serial driver should take over, which might be related to kernel config. Change-Id: I2a178595bd2aa2e1f114cbc69e8eadd46955b54d Signed-off-by: Xiang Wang <merle@hardenedlinux.org> Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32394 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
2019-07-28riscv: Remove unused headersPatrick Rudolph
Change-Id: I4cd03e043e1bc2795b98d6ec2f88efa5b50d872b Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/34141 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2019-07-12arch, include, soc: Use common stdint.hJacob Garber
There are only minimal differences between the architecture specific stdint.h implementations, so let's tidy them up and merge them together into a single file. In particular, - Use 'unsigned long' for uintptr_t. This was already the case for x86 and riscv, while arm and mips used 'unsigned int', and arm64 and ppc64 used 'unsigned long long'. This change allows using a single integer type for uintptr_t across all architectures, and brings it into consistency with the rest of the code base, which generally uses 'unsigned long' for memory addresses anyway. This change required fixing several assumptions about integer types in the arm code. - Use _Bool as the boolean type. This is a specialized boolean type that was introduced in C99, and is preferrable over hacking booleans using integers. romcc sadly does not support _Bool, so for that we stick with the old uint8_t. - Drop the least and fast integer types. They aren't used anywhere in the code base and are an unnecessary maintenance burden. Using the standard fixed width types is essentially always better anyway. - Drop the UINT64_C() macro. It also isn't used anywhere and doesn't provide anything that a (uint64_t) cast doesn't. - Implement the rest of the MIN and MAX numerical limits. - Use static assertions to check that the integer widths are correct. Change-Id: I6b52f37793151041b7bdee9ec3708bfad69617b2 Signed-off-by: Jacob Garber <jgarber1@ualberta.ca> Reviewed-on: https://review.coreboot.org/c/coreboot/+/34075 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2019-07-02arch/riscv: Make RISCV specific options depend on ARCH_RISCVArthur Heymans
Also don't define the default as this results in spurious lines in the .config. The only difference in the generated config.h is that for most board ARCH_RISCV_M goes from 1 to 0. This should not matter. Change-Id: I3e8c1cc5696d621e243696a3b5e34f62ab69a688 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31311 Reviewed-by: Patrick Rudolph <siro@das-labor.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-06-28arch/riscv/mcall: Drop debug codePatrick Rudolph
The printk has no effect as console_init() hasn't been called. Also drop unused variables and headers. Change-Id: I5bf5a8822c69bbcc3de1de460d19585b8330649f Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/33786 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-by: Philipp Hug <philipp@hug.cx>
2019-06-23riscv: workaround selfboot putting the coreboot table into prog_entry_argXiang Wang
On RISC-V the argument to a payload is always the hartid and a pointer to a FDT. selfboot sets the coreboot tables as an argument, work around this here. Change-Id: If6929897c7f12d8acb079eeebaef512ae506ca8b Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31477 Reviewed-by: ron minnich <rminnich@gmail.com> Reviewed-by: Patrick Rudolph <siro@das-labor.org> Reviewed-by: Philipp Hug <philipp@hug.cx> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-06-23riscv: use mret to invoke M-mode payload and disable interruptsXiang Wang
Fixes a logic error that sets MPIE, but didn't use mret to return to the payload. This left MIE set to an undefined value. Now all modes are handled the same way: - Trap vector base address point to the payload - Disable Interrupt - Return to payload using mret TEST=Run an M-mode payload Change-Id: Iaab595f916949c57104ec00f8b06ea047fe76bba Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/33462 Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-by: Patrick Rudolph <siro@das-labor.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-06-23riscv: Fix MENTRY_FRAME_SIZE to fit different machine lengthsXiang Wang
Change-Id: Iabe390963bcbeb9ec6016faa8312d101431942da Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31976 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Hug <philipp@hug.cx>
2019-06-04arch/riscv/Kconfig: Make correct default value for CONFIG_ARCH_RISCV_MSubrata Banik
Change-Id: Ib9329904060cab48d527de1b1ccdab5b6fe71b99 Signed-off-by: Subrata Banik <subrata.banik@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/33144 Reviewed-by: Martin Roth <martinroth@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-04-23src: Use include <console/console.h> when appropriateElyes HAOUAS
Change-Id: Iddba5b03fc554a6edc4b26458d834e47958a6b08 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32214 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-by: David Guckian
2019-04-23src: Add missing include 'console.h'Elyes HAOUAS
Change-Id: Ie21c390ab04adb5b05d5f9760d227d2a175ccb56 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32122 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
2019-03-20src: Use 'include <string.h>' when appropriateElyes HAOUAS
Drop 'include <string.h>' when it is not used and add it when it is missing. Also extra lines removed, or added just before local includes. Change-Id: Iccac4dbaa2dd4144fc347af36ecfc9747da3de20 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31966 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2019-03-08coreboot: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX)Julius Werner
This patch is a raw application of find src/ -type f | xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g' Change-Id: I6262d6d5c23cabe23c242b4f38d446b74fe16b88 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31774 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-03-04arch/io.h: Separate MMIO and PNP opsKyösti Mälkki
Change-Id: Ie32f1d43168c277be46cdbd7fbfa2445d9899689 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/31699 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-03-04device/mmio.h: Add include file for MMIO opsKyösti Mälkki
MMIO operations are arch-agnostic so the include path should not be arch/. Change-Id: I0fd70f5aeca02e98e96b980c3aca0819f5c44b98 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/31691 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-02-13riscv: Add initial support for 32bit boardsPhilipp Hug
* Adding separate targets for 32bit and 64bit qemu * Using the riscv64 toolchain for 32bit builds requires setting -m elf32lriscv * rv32/rv64 is currently configured with ARCH_RISCV_RV32/RV64 and not per stage. This should probably be changed later. TEST=Boots to "Payload not loaded." on 32bit qemu using the following commands: util/riscv/make-spike-elf.sh build/coreboot.rom build/coreboot.elf qemu-system-riscv32 -M virt -m 1024M -nographic -kernel build/coreboot.elf Change-Id: I35e59b459d1770df10b51fe9e77dcc474d7c75a0 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/c/31253 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: ron minnich <rminnich@gmail.com>
2019-02-09riscv: Use correct argument in a1 when invoking payloadPhilipp Hug
Fix a bug introduced by: 820dcfceb3901dbb00bb90c876e374126ca14e20 riscv: Simplify payload handling Put fdt into a1 correctly. Change-Id: I0dea7b88fde9d9a7365cb366917747d8110b9159 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/c/31287 Reviewed-by: ron minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-02-02riscv: Show hart id in trap handlerPhilipp Hug
Also show hart id in trap information for easier debugging. Change-Id: I20acf86e1af111600c158295ae03b2167838d127 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/c/31201 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: ron minnich <rminnich@gmail.com>
2019-02-02riscv: Simplify payload handlingXiang Wang
1. Simplify payload code and convert it to C 2. Save the FDT pointer to HLS (hart-local storage). 3. Don't use mscratch to pass FDT pointer as it is used for exception handling. Change-Id: I32bf2a99e07a65358a7f19b899259f0816eb45e8 Signed-off-by: Xiang Wang <wxjstz@126.com> Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/c/31179 Reviewed-by: ron minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-01-24riscv: ARCH_RISCV_RV{32,64} selects ARCH_RISCVRonald G. Minnich
ARCH_RISCV_RV{32,64} will now select ARCH_RISCV. Change-Id: Ia7a1a8f0bfab20e91b8429dd6dd3e9a4180a0a5b Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/c/31042 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Hug <philipp@hug.cx>
2019-01-17riscv: create Kconfig architecture features for new partsRonald G. Minnich
RISCV parts can be created with any one of four CPU modes enabled, with or without PMP, and with either 32 or 64 bit XLEN. In anticipation of parts to come, create the Kconfig variables for these architecture attributes. Change-Id: I32ee51b2a469c7684a2f1b477bdac040e972e253 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/c/30348 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-01-16buildsystem: Promote rules.h to default includeKyösti Mälkki
Does not fix 3rdparty/, *.S or *.ld or yet. Change-Id: I66b48013dd89540b35ab219d2b64bc13f5f19cda Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/17656 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2018-12-19arch/riscv: Don't set FPU state to "dirty"Jonathan Neuschäfer
Quoting from the RISC-V Privileged Architecture manual version 1.10, chapter 3.1.11: The FS and XS fields use the same status encoding as shown in Table 3.3, with the four possible status values being Off, Initial, Clean, and Dirty. Status FS Meaning XS Meaning 0 Off All off 1 Initial None dirty of clean, some on 2 Clean None dirty, some clean 3 Dirty Some dirty Change-Id: If0225044ed52215ce64ea979d120014e02d4ce37 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/c/28987 Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-12-19arch/riscv: Define and use SBI_ENOSYSJonathan Neuschäfer
Change-Id: Ia7f409ebc7e50383a7e445ef8806953347501dab Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/c/30175 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-12-18arch/riscv: Don't hardcode CSR numbers anymoreJonathan Neuschäfer
They are hopefully stable enough by now. TEST=Building with for emulation/spike-riscv with BUILD_TIMELESS, with and without this patch, results in the same coreboot.rom. Change-Id: Ie6747c7eeea6cd8fd2138c5ba535a08c5add9038 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/c/30164 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-12-07riscv: fix non-SMP supportPhilipp Hug
Use CONFIG_CPU_MAX which defaults to 1 instead of CONFIG_RISCV_HART_NUM. The default value of CONFIG_RISCV_HART_NUM was 0 and cause a jump to address 0. Add a die() call to fail gracefully. Change-Id: I4e3aa09b787ae0f26a4aae375f4e5fcd745a0a1e Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/c/29993 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Xiang Wang <wxjstz@126.com> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-11-19src: Add required space after "switch"Elyes HAOUAS
Change-Id: I85cf93e30606bc7838852bd300a369e79370629a Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/29623 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2018-11-05riscv: add support for supervisor binary interface (SBI)Xiang Wang
SBI is runtime service for OS. For an introduction, please refer to https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.md Change-Id: Ib6c1f21d2f085f02208305dc4e3a0f970d400c27 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28096 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-11-05riscv: add support to block smp in each stageXiang Wang
Each stage performs some basic initialization (stack, HLS etc) and then call smp_pause to enter the single-threaded state. The main work of each stage is executed in a single-threaded state, and the multi-threaded state is restored by call smp_resume while booting the next stage. Change-Id: I8d508c3d0f65a022010e74f8edad7ad2cfdc7dee Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/29024 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-11-05riscv: add support smp_pause / smp_resumeXiang Wang
See https://doc.coreboot.org/arch/riscv/ we know that we need to execute smp_pause at the start of each stage and smp_resume at the end of each stage. Change-Id: I6f8159637bfb15f54f0abeb335de2ba6e9cf82fb Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/29023 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-10-30src: Add missing include <stdint.h>Elyes HAOUAS
Change-Id: I6a9d71e69ed9230b92f0f330875515a5df29fc06 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/29312 Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-10-30riscv: simplify timer interrupt handlingPhilipp Hug
Just disable the timer interrupt and notify supervisor. To receive another timer interrupt just set timecmp and enable machine mode timer interrupt again. TEST=Run linux on sifive unleashed Change-Id: I5d693f872bd492c9d0017b514882a4cebd5ccadd Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/29340 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-10-30src/arch/riscv/misaligned.c: Fix an off-by-one error when loading the opcodePhilipp Hug
Pointer to opcode increases by unit uint16_t not byte. Change-Id: I2986ca5402ad86d80e0eb955478bfbdc5d50e1f5 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/29339 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-10-11selfboot: remove bounce buffersRonald G. Minnich
Bounce buffers used to be used in those cases where the payload might overlap coreboot. Bounce buffers are a problem for rampayloads as they need malloc. They are also an artifact of our x86 past before we had relocatable ramstage; only x86, out of the 5 architectures we support, needs them; currently they only seem to matter on the following chipsets: src/northbridge/amd/amdfam10/Kconfig src/northbridge/amd/lx/Kconfig src/northbridge/via/vx900/Kconfig src/soc/intel/fsp_baytrail/Kconfig src/soc/intel/fsp_broadwell_de/Kconfig The first three are obsolete or at least could be changed to avoid the need to have bounce buffers. The last two should change to no longer need them. In any event they can be fixed or pegged to a release which supports them. For these five chipsets we change CONFIG_RAMBASE from 0x100000 (the value needed in 1999 for the 32-bit Linux kernel, the original ramstage) to 0xe00000 (14 Mib) which will put the non-relocatable x86 ramstage out of the way of any reasonable payload until we can get rid of it for good. 14 MiB was chosen after some discussion, but it does fit well: o Fits in the 16 MiB cacheable range coreboot sets up by default o Most small payloads are well under 14 MiB (even kernels!) o Most large payloads get loaded at 16 MiB (especially kernels!) With this change in place coreboot correctly still loads a bzImage payload. Werner reports that the 0xe00000 setting works on his broadwell systems. Change-Id: I602feb32f35e8af1d0dc4ea9f25464872c9b824c Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/28647 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2018-10-11riscv: add physical memory protection (PMP) supportXiang Wang
These codes are written by me based on the privileged instruction set. I tested it by qemu/riscv-probe. Change-Id: I2e9e0c94e6518f63ade7680a3ce68bacfae219d4 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28569 Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-10-08Move compiler.h to commonlibNico Huber
Its spreading copies got out of sync. And as it is not a standard header but used in commonlib code, it belongs into commonlib. While we are at it, always include it via GCC's `-include` switch. Some Windows and BSD quirk handling went into the util copies. We always guard from redefinitions now to prevent further issues. Change-Id: I850414e6db1d799dce71ff2dc044e6a000ad2552 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/28927 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2018-10-06arch/riscv: Update comment about mstatus initializationJonathan Neuschäfer
coreboot does not set up virtual memory anymore. Change-Id: I231af07b2988e8362d1cdd606ce889fb31136ff1 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/28831 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-10-04arch/riscv: Adjust compiler flags for scan-buildJonathan Neuschäfer
Clang doesn't understand -march=riscv64imac and -mcmodel=medany, so don't use them when running the clang static analyzer. On the other hand, __riscv and __riscv_xlen need to be defined in order to select some macros in src/arch/riscv/include/arch/encoding.h. __riscv_flen selects the floating-point paths in src/arch/riscv/misaligned.c. -mabi is moved with -march for consistency. A complete list of preprocessor definitions on RISC-V can be found at https://github.com/riscv/riscv-toolchain-conventions#cc-preprocessor-definitions With this commit, scan-build produces a useful result on RISC-V. Change-Id: Ia2eb8c3c2f7eb5ddd47db24b8e5fcd6eaf6c5589 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/28713 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2018-09-26arch/riscv: Advance the PC after handling misaligned load/storeJonathan Neuschäfer
After emulating an instruction in the misaligned load/store handler, we need to increment the program counter by the size of instruction. Otherwise the same instruction is executed (and emulated) again and again. While were at it: Also return early in the unlikely case that the faulting instruction is not 16 or 32 bits long, and be more explicit about the return values of fetch_*bit_instruction. Tested by Philipp Hug, using the linuxcheck payload. Fixes: cda59b56ba ("riscv: update misaligned memory access exception handling") Change-Id: Ie2dc0083835809971143cd6ab89fe4f7acd2a845 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/28617 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-09-21arch/riscv/include/arch: Don't use device_tElyes HAOUAS
Use of device_t is deprecated. Change-Id: If52de0d87b02419090b29a7cf1952905d3f975f6 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/28691 Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-09-16riscv: don't write to mstatus.XSXiang Wang
XS is a read-only field of mstatus. Unable to be write. So remove this code. Change-Id: I3ad6b0029900124ac7cce062e668a0ea5a8b2c0e Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28357 Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-09-15arch/riscv: Configure delegation only if S-mode is supportedJonathan Neuschäfer
On the FU540 the bootblock runs on a core without lesser privilege modes, so the medeleg/mideleg CSRs are not implemented on that core, leading to a CPU exception when these CSRs are accessed. Configure medeleg/mideleg only if the misa register indicates that S-mode is implemented on the executing RISC-V core. Change-Id: Idad97e42bac2ff438dd233a5d125f93594505d63 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/25791 Reviewed-by: Xiang Wang <wxjstz@126.com> Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Johanna Schander <coreboot@mimoja.de> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-09-14arch/riscv: Only execute on hart 0 for nowPhilipp Hug
Only execute coreboot on hart 0 until synchronisation between hart's is ready. Change-Id: I2181e79572fbb9cc7bee39a3c2298c0dae6c1658 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/28605 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-09-14arch/riscv: provide a monotonic timerPhilipp Hug
The RISC-V Privileged Architecture specification defines the Machine Time Registers (mtime and mtimecmp) in section 3.1.15. Makes it possible to use the generic udelay. The timer is enabled using RISCV_USE_ARCH_TIMER for the lowrisc, sifive and ucb soc. Change-Id: I5139601226e6f89da69e302a10f2fb56b4b24f38 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/27434 Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-09-14arch/riscv: add missing endian.h header to io.hPhilipp Hug
Make it uniform as other architectures also include it in io.h Change-Id: I62c2d909c703f01cdaabdaaba344f82b6746f094 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/28601 Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-09-14complier.h: add __always_inline and use it in code baseAaron Durbin
Add a __always_inline macro that wraps __attribute__((always_inline)) and replace current users with the macro, excluding files under src/vendorcode. Change-Id: Ic57e474c1d2ca7cc0405ac677869f78a28d3e529 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/28587 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@google.com>
2018-09-10riscv: update misaligned memory access exception handlingXiang Wang
Support for more situations: floating point, compressed instructions, etc. Add support for redirect exception to S-Mode. Change-Id: I9983d56245eab1d458a84cb1432aeb805df7a49f Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27972 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-09-10riscv: update mtime initializationXiang Wang
Add a interface, which is implemented by SoC. Change-Id: I5524732f6eb3841e43afd176644119b03b5e5e27 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28372 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-09-05riscv: add entry assembly file for RAMSTAGEXiang Wang
RAMSTAGE will revoke CAR/scratchpad, so stack and exception handling needs to be moved to ddr memory. So add a assembly file to do this. Change-Id: I58aa6ff911f385180bad6e026d3c3eace846e37d Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28384 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2018-09-05riscv: add support to check machine length at runtimeXiang Wang
Highest two bits of misa can be used to check machine length. Add code to support this. Change-Id: I3bab301d38ea8aabf2c70437e179287814298b25 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27770 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-09-04riscv: add spin lock supportXiang Wang
Add spin lock support for riscv. Change-Id: I7e93fb8b35c4452f0fe3f7f4bcc6f7aa4e042451 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27356 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-09-04riscv: Add DEFINE_MPRV_READ_MXR to read execution-only pageXiang Wang
Must to set MXR, when needs to read the page which is execution-only. So make this change. Change-Id: I19519782fe791982a8fbd48ef33b5a92a3c48bfc Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28394 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-09-02riscv: separately define stack locations at different stagesXiang Wang
BOOTBLOCK/ROMSTAGE run in CAR/scratchpad. When RAMSTAGE begins execution will enable cache, then CAR will disappear. So the Stack will be separated. Change-Id: I37a0c1928052cabf61ba5c25b440363b75726782 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28383 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
2018-08-30riscv: update the definition of intptr_t/uintptr_tXiang Wang
These RISC-V ABIs defined by GCC : ilp32 ilp32d ilp32f lp64 lp64d lp64f. Through this we know that the length of the long's bit is equal to pointer. So update this code. This's more flexible. Change-Id: I16e1a2c12c6034df75dc360b65acb1b6affec49b Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27768 Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-08-07arch: Retire cache_sync_instructions() from <arch/cache.h> (except arm)Julius Werner
cache_sync_instructions() has been superseded by arch_program_segment_loaded() and friends for a while. There are no uses in common code anymore, so let's remove it from <arch/cache.h> for all architectures. arm64 still has an implementation and one reference, but they are not really needed since arch_program_segment_loaded() does the same thing already. Remove them. Leave it in arm(32) since there are several references (including in SoC code) that I don't feel like tracking down and testing right now. Change-Id: I6b776ad49782d981d6f1ef0a0e013812cf408524 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/27879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2018-08-01riscv: remove redundancy in MakefileXiang Wang
src/arch/riscv/stages.c is an entry of romstage/ramstage, and does not needs to be bootblock. src/arch/riscv/id.S src/arch/riscv/id.ld is used to generate some compile/board/time information, which is repeated with src/lib/version.c Change-Id: Ic736b378e24df387584c5f86a2b04078fc55723d Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27557 Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-07-31riscv: fix issues (timestrap & PRIu64)Xiang Wang
When I tried to compile the RISC-V code (202e7d4f3c), I found some errors: `PRIu64` is undefined src/arch/riscv/timestamp.c does not exist Currently RISC-V does not have the implementation and use of timestamp, so I temporarily delete the code related to timestamp in the Makefile. And define PRIu64. Change-Id: I7f1a0793113bce7c1411e39f102cf20dbadda5d6 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27543 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-07-30riscv: delete src/arch/riscv/prologue.incXiang Wang
This code was copied from x86. It is not needed for RISC-V. Change-Id: If6c3bfdc4090e45d171e68a28d27c38dabe91687 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27544 Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-07-18arch/riscv: Fix makefile to only set flags for riscvMartin Roth
This was updating flags for ALL architectures, not just riscv. That was bad, and gave us errors, although they weren't fatal for some reason: i386-elf-gcc: error: missing argument to '-mcmodel=' i386-elf-gcc: error: missing argument to '-march=' i386-elf-gcc: error: missing argument to '-mabi=' This issue started from commit 5fed693a (riscv: add support for modifying compiler options) Add comments to the other 'endif' statements since they're now surrounded by a global ifeq Change-Id: Ifa12ad98b04a5ac36148609ccdf46ca427fc5a27 Signed-off-by: Martin Roth <martin@coreboot.org> Reviewed-on: https://review.coreboot.org/27535 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2018-07-18riscv: add CAR interface Xiang Wang
Add an interface to support cache as ram. Initialize stack pointer for each hart. Change-Id: Ic3920e01dd1a7f047a53de57250589000a111409 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27430 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-07-17riscv: add support for modifying compiler optionsXiang Wang
Each HART of a SoC like fu540 supports a different ISA. In order for the coreboot's code can run on each core, need to modify the compile options. So add this code. Change-Id: Ie33edc175e612846d4a74f3cbf7520d4145cb68b Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27442 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-07-12riscv: add include/arch/smp/ directoryXiang Wang
Replicate directory layout from x86 for SMP. Change-Id: I27aee55f24d96ba9e7d8f2e6653f6c9c5e85c66a Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27355 Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-07-11riscv: add support to check ISA extensionXiang Wang
Add support to check ISA extension for RISC-V. Change-Id: I5982fb32ed1dd435059edc6aa0373bffa899e160 Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27410 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-07-06riscv: use __riscv_atomic to check support A extensionXiang Wang
GCC pre-defined some macros for detecting ISA extensions. We should use these macros to detect ISA features. Change-Id: I5782cdd1bf64b0161c58d789f46389dccfe44475 Signed-off-by: XiangWang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/27300 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2018-04-27RISC-V boards: Remove PAGETABLES section from memlayout.ldJonathan Neuschäfer
RISC-V doesn't set up page tables anymore, since commit b26759d703 ("arch/riscv: Don't set up virtual memory"). Change-Id: Id1e759b63fb0bc88ab256994d3849d16814affa0 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/25701 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-04-26arch/riscv: Store mprv bit in size_tJonathan Neuschäfer
CSRs are XLEN bits wide (i.e. the same width as general purpose registers), so size_t seems a little more correct than int. This change doesn't affect functionality because MSTATUS_MPRV already fits in 31 bits. Change-Id: I003c1b88b4493681dc9b6178ac785be330203ef5 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/25625 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-04-11arch/riscv: Remove I/O space access functions (outb, etc.)Jonathan Neuschäfer
RISC-V does not have the kind of I/O space that x86 has. Other architectures tend to leave out these definitions as well. Change-Id: I7328dae1f1fa4ef8772750244a0b11a3fa5aa88f Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/25566 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2018-02-20arch/riscv: Delegate the page fault exceptionsJonathan Neuschäfer
These exceptions were new in the Privileged Architecture spec 1.10. We need to delegate them to S-mode. Change-Id: Iec15afe9656107b9aeea1677c5b8dc7d654fa746 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/23774 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-02-20arch/riscv: Update encoding.h and adjust related codeJonathan Neuschäfer
Update encoding.h to the version shipped with spike commit 0185d36 ("Merge pull request #165 from riscv/small_progbuf"), and copy the license header from the LICENSE file. Change-Id: I517042e5865986e88a589dc8623745f8d584d6b8 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/23773 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-02-20arch/riscv: Pass the bootrom-provided FDT to the payloadJonathan Neuschäfer
The RISC-V boot protocol foresees that at every stage boundary (bootrom to boot loader, boot loader -> OS), register a0 contains the Hart ID and a1 contains the physical address of the Flattened Device Tree that the stage shall use. As a first step, pass the bootrom-provided FDT to the payload, unmodified. Change-Id: I468bc64a47153d564087235f1c7e2d10e3d7a658 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/23797 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-02-20arch/riscv: Don't set up virtual memoryJonathan Neuschäfer
Due to changes in the RISC-V Privileged Architecture specification, Linux can now be started in physical memory and it will setup its own page tables. Thus we can delete most of virtual_memory.c. Change-Id: I4e69d15f8ee540d2f98c342bc4ec0c00fb48def0 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/23772 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-02-20arch/riscv: Make RVC support configurableJonathan Neuschäfer
In order to support RISC-V processors with and without the RVC extension, configure the architecture variant (-march=...) explicitly. NOTE: Spike does support RVC, but currently doesn't select ARCH_RISCV_COMPRESSED, because coreboot's trap handler doesn't support RVC. Change-Id: Id4f69fa6b33604a5aa60fd6f6da8bd966494112f Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/23733 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-02-20arch/riscv: Align trap_entry to 4 bytes, as required by specJonathan Neuschäfer
The RISC-V Privileged Architecture spec 1.10 requires that the address part of mtvec is four-byte aligned. The lower two bits encode a "mode" flag and should be zero for now. Add the necessary alignment directive before trap_entry. Change-Id: I83ea23e2c8f984775985ae7d61f80ad75286baaa Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/23173 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-12-02arch/riscv: Remove supervisor_trap_entryJonathan Neuschäfer
coreboot only maintains a single trap entry, because it only runs in machine mode. Change-Id: I7324d9c8897d5c4e9d4784e7bc2a055890eab698 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/22595 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-12-02riscv: Remove config string supportJonathan Neuschäfer
The code dealing with the old config string isn't needed anymore, because the config string has been deprecated in favor of OpenFirmware-derived devicetrees. Change-Id: I71398fb4861dbaf7eefc6e6f222bb7159798fafa Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/22594 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-12-02arch/riscv: Remove the current SBI implementationJonathan Neuschäfer
This Supervisor Binary Interface, which is based on a page of code that's provided to operating systems by the M-mode software, has been superseded by a different (currently not really documented) SBI, which is based on directly executing ECALLs instructions. Thus some of our code becomes obsolete. Just rip it out until we implement the new SBI. Change-Id: Iec9c20b750f39a2b8f1553e25865bbf150605a6d Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/22593 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-12-02arch/riscv: Return from trap_handler instead of jumping outJonathan Neuschäfer
Change-Id: I8dbed5dbe377d3a02e58a3bc16a1ee112b28bea9 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21764 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-12-02arch/riscv: Unify trap returnJonathan Neuschäfer
Change-Id: I9de0c92b3f925e8f4db00d7281222a07db68b2ae Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21763 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-11-23Constify struct cpu_device_id instancesJonathan Neuschäfer
There is currently no case where a struct cpu_device_id instance needs to be modified. Thus, declare all instances as const. Change-Id: I5ec7460b56d75d255b3451d76a46df76a51d6365 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/22526 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2017-11-07arch/riscv: Use a separate trap stackJonathan Neuschäfer
This is the lazy solution, as explained in the comment, but it works for now. Change-Id: I46e18b6d633280d6409e42462500fbe7c6823b4d Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21689 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-11-07arch/riscv: gettimer: Don't use the config stringJonathan Neuschäfer
Accessing the config string doesn't work anymore on current versions of spike. Thus return dummy pointers until we have a better solution. Change-Id: I684fc51dc0916f2235e57e36b913d363e1cb02b1 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21687 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-11-07arch/riscv: Drop mret workaroundJonathan Neuschäfer
Our toolchain can compile mret now, and once the encoding changes, we'll have to adjust the code anyway. Change-Id: Ic37a849f65195006fa15d74f651a8aa9a9da5b5c Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21762 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-11-07arch/riscv: mprv_read_*: Mark result as earlyclobberJonathan Neuschäfer
This fixes a case of mstatus corruption, where GCC generated code that used the same register for the mprv bit and the result. GCC inline assembly register modifiers are documented here: https://gcc.gnu.org/onlinedocs/gcc/Modifiers.html Change-Id: I2c563d171892c2e22ac96b34663aa3965553ceb3 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21688 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-11-07arch/riscv: Fix return type of mprv_read_u64Jonathan Neuschäfer
Change-Id: I3dc12feefe5f0762e27d2ad0234371e91313c847 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21929 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-09-27arch/riscv: hls_init: Initialize time{,cmp} with dummy pointersJonathan Neuschäfer
In current versions of spike, the config string is not available anymore, because RISC-V is moving toward OpenFirmware-derived device trees (either in FDT or text format). Using query_config_string leads to a crash in these versions of spike. With this commit and If0bea4bf52d ("riscv: Update register address"), coreboot reaches the romstage again, on spike. Change-Id: Ib1e6565145f0b2252deb1f4658221a4f816e2af4 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21657 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-09-27arch/riscv: Document mprv_{read,write}_* functionsJonathan Neuschäfer
Change-Id: Iaf0cb241f0eb4de241f0983c0b32dbcc28f96480 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21342 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-09-27arch/riscv: trap handler: Print load/store access width in bitsJonathan Neuschäfer
This is easier to read than the raw shift amount that's extracted from load/store instructions. Change-Id: Ia16ab9fbaf55345b654ea65e65267ed900eb29e1 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/21654 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-09-26riscv: Update register addresswxjstz
I triggered a bug, when I try to debug riscv code by spike. This bug is caused by an instruction exception[csrwi 0x320,7]. This is operate for mcounteren. This address is error. 0x306 is right. scounteren is not need to be set, because S-mode code controls it. Change-Id: If0bea4bf52d8ad2fb2598724d6feb59dc1b3084a Signed-off-by: wxjstz<wxjstz@126.com> Reviewed-on: https://review.coreboot.org/20043 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2017-07-25src/arch: Fix checkpatch warning: no spaces at the start of a lineMartin Roth
Change-Id: Id9846ceb714dceaea12ea33ce2aa2b8e5bb6f4df Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/20728 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2017-07-07arch/*: Update Kconfig symbol usageMartin Roth
- Update all symbols to use IS_ENABLED() - Update non-romcc usage to use 'if' instead of '#if' where it makes sense. Change-Id: I5a84414d2d1631e35ac91efb67a0d4c1f673bf85 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/20005 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2017-06-07src: change coreboot to lowercaseMartin Roth
The word 'coreboot' should always be written in lowercase, even at the start of a sentence. Change-Id: I7945ddb988262e7483da4e623cedf972380e65a2 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/20029 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2017-05-30arch: Unify basic cache clearing APIJulius Werner
Caching is a very architecture-specific thing, but most architectures have a cache in general. Therefore it can be useful to have a generic architecture-independent API to perform simple cache management tasks from common code. We have already standardized on the dcache_clean/invalidate naming scheme that originally comes from ARM in libpayload, so let's just do the same for coreboot. Unlike libpayload, there are other things than just DMA coherency we may want to achieve with those functions, so actually implement them for real even on architectures with cache-snooping DMA like x86. (In the future, we may find applications like this in libpayload as well and should probably rethink the API there... maybe move the current functionality to a separate dma_map/unmap API instead. But that's beyond scope of this patch.) Change-Id: I2c1723a287f76cd4118ef38a445339840601aeea Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/19788 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
2017-02-20riscv: Suppress invalid coverity errorsMartin Roth
Coverity is detecting 'sp' as a variable which has not been initialized. This is obviously not correct, so this patch *TRIES* to mark it as false I'm not positive that this will work because the annotation needs to go on the line above the error, but this error is inside of a # define. Does the whole #define count as one line? Can it go on the line above the #define in the .h file? Does it have to precede every line where the #define is used? The documentation doesn't make this clear. Should suppress coverity issues: 1368525 & 1368527 uninit_use: Using uninitialized value sp. Change-Id: Ibae5e206c4ff47991ea8a11b6b59972b24b71796 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/18247 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2017-01-16riscv: Move mcall numbers to mcall.h, adjust their namesJonathan Neuschäfer
The new name and location make more sense: - The instruction used to call into machine mode isn't called "ecall" anymore; it's mcall now. - Having SBI_ in the name is slightly wrong, too: these numbers are not part of the Supervisor Binary Interface, they are just used to forward SBI calls (they could be renumbered arbitrarily without breaking an OS that's run under coreboot). Also remove mcall_dev_{req,resp} and the corresponding mcall numbers, which are no longer used. Change-Id: I76a8cb04e4ace51964b1cb4f67d49cfee9850da7 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/18146 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2017-01-16riscv: get SBI calls to workRonald G. Minnich
SBI calls, as it turned out, were never right. They did not set the stack correctly on traps. They were not correctly setting the MIP instead of the SIP (although this was not really well documented). On Harvey, we were trying to avoid using them, and due to a bug in SPIKE, our avoidance worked. Once SPIKE was fixed, our avoidance broke. This set of changes is tested and working with Harvey which, for the first time, is making SBI calls. It's not pretty and we're going to want to rework trap_util.S in coming days. Change-Id: Ibef530adcc58d33e2c44ff758e0b7d2acbdc5e99 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/18097 Tested-by: build bot (Jenkins)
2016-12-20riscv: enable counters via m[us]counterenRonald G. Minnich
The user and supervisor counters could not be safely enabled before as the register numbers were not finalized. Now that everyone agrees, we can enable them. Until we are sure the toolchains are caught up, we use the hardcode name with the register names in comments. As soon as toolchains settle down we'll do one more pass and convert to the symbolic names. Tested on lowrisc bitstream and SPIKE simulator. Change-Id: I21fe5cac44fafe4b7806e004c179aa27541be4b6 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/17920 Tested-by: build bot (Jenkins) Reviewed-by: Alex Bradbury <asb@lowrisc.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Andrew Waterman <aswaterman@gmail.com>
2016-12-18riscv: Add support for timer interruptsRonald G. Minnich
RISCV requires that timer interrupts be handled in machine mode and delegated as necessary. Also you can only reset the timer interrupt by writing to mtimecmp. Further, you must write a number > mtime, not just != mtime. This rather clumsy situation requires that we write some value into the future into mtimecmp lest we never be able to leave machine mode as the interrupt either is not cleared or instantly reoccurs. This current code is tested and works for harvey (Plan 9) timer interrupts. Change-Id: I8538d5fd8d80d9347773c638f5cbf0da18dc1cae Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/17807 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2016-12-06riscv: Stub out sbi_(un)mask_interruptJonathan Neuschäfer
Linux needs these SBI calls, but so far it seems to work when they don't do anything. Change-Id: I2cd0bb3ab91e89805fed84ec87e4a48ce70c3a46 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/17593 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-12-06arch/riscv/mcall.c: Return the correct memory base and sizeJonathan Neuschäfer
Change-Id: Ibf471787ccb4f5393b0af737a9f7fc47b853a41a Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/17594 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-11-20riscv: map first 4GiB of physical address spaceRonald G. Minnich
o The first 4G of physical address space is now mapped at 0. o The first 4G of physical address space is now mapped at 1 << 38. o The first 2G of DRAM (2 - 4 GiB of physical address space) is now mapped at the top of memory save for the last 4K i.e. at 0xffffffff80000000, with SBI page at the very top. Of these, we hope to remove the *most* of the last one once the gcc toolchain can handle linking programs that can run at "top 33 bits of address not all ones (but bit 63 set)". The 4K mapping of the top of the 64 bit address space will always remain, however, for SBI calls. Change-Id: I77b151720001bddad5563b0f8e1279abcea056fa Reviewed-on: https://review.coreboot.org/17403 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
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