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2020-05-13src: Remove unused '#include <stdint.h>'Elyes HAOUAS
unused includes of <stdin.h> found using following commande: diff <(git grep -l '#include <stdint.h>' -- src/) <(git grep -l 'int8_t\|uint8_t\|int16_t\|uint16_t\|int32_t\|uint32_t\|int64_t\| uint64_t\|intptr_t\|uintptr_t\|intmax_t\|uintmax_t\|s8\|u8\|s16\| u16\|s32\|u32\|s64\|u64\|INT8_MIN\|INT8_MAX\|UINT8_MAX\|INT16_MIN\ |INT16_MAX\|UINT16_MAX\|INT32_MIN\|INT32_MAX\|UINT32_MAX\|INT64_MIN\ |INT64_MAX\|UINT64_MAX\|INTMAX_MIN\|INTMAX_MAX\|UINTMAX_MAX' -- src/) |grep '<' |grep -v vendor |grep -vF '.h' Change-Id: Icb9b54c6abfb18d1e263665981968a4d7cccabeb Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41148 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-05-11treewide: Remove "this file is part of" linesPatrick Georgi
Stefan thinks they don't add value. Command used: sed -i -e '/file is part of /d' $(git grep "file is part of " |egrep ":( */\*.*\*/\$|#|;#|-- | *\* )" | cut -d: -f1 |grep -v crossgcc |grep -v gcov | grep -v /elf.h |grep -v nvramtool) The exceptions are for: - crossgcc (patch file) - gcov (imported from gcc) - elf.h (imported from GNU's libc) - nvramtool (more complicated header) The removed lines are: - fmt.Fprintln(f, "/* This file is part of the coreboot project. */") -# This file is part of a set of unofficial pre-commit hooks available -/* This file is part of coreboot */ -# This file is part of msrtool. -/* This file is part of msrtool. */ - * This file is part of ncurses, designed to be appended after curses.h.in -/* This file is part of pgtblgen. */ - * This file is part of the coreboot project. - /* This file is part of the coreboot project. */ -# This file is part of the coreboot project. -# This file is part of the coreboot project. -## This file is part of the coreboot project. --- This file is part of the coreboot project. -/* This file is part of the coreboot project */ -/* This file is part of the coreboot project. */ -;## This file is part of the coreboot project. -# This file is part of the coreboot project. It originated in the - * This file is part of the coreinfo project. -## This file is part of the coreinfo project. - * This file is part of the depthcharge project. -/* This file is part of the depthcharge project. */ -/* This file is part of the ectool project. */ - * This file is part of the GNU C Library. - * This file is part of the libpayload project. -## This file is part of the libpayload project. -/* This file is part of the Linux kernel. */ -## This file is part of the superiotool project. -/* This file is part of the superiotool project */ -/* This file is part of uio_usbdebug */ Change-Id: I82d872b3b337388c93d5f5bf704e9ee9e53ab3a9 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41194 Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-03-06src/arch/riscv: Convert to SPDX license headerPatrick Georgi
This also drops individual copyright notices, all mentioned authors in that part of the tree are listed in AUTHORS. Change-Id: I770c1afd9b68a40ec0e69818f24b5ef3ad4f1d35 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/39283 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
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>
2018-12-18arch/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>
2018-09-16riscv: 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>
2018-02-20arch/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: 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>
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>
2017-09-26riscv: 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>
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>
2016-11-20riscv: 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>
2016-11-14riscv: add a variable to control trap managementRonald G. Minnich
This variable can be set in a debugger (e.g. Spike) to finely control which traps go to coreboot and which go to the supervisor. Change-Id: I292264c15f002c41cf8d278354d8f4c0efbd0895 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/17404 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
2016-10-24RISCV: Clean up the common architectural codeRonald G. Minnich
This version of coreboot successfully starts a Harvey (Plan 9) kernel as a payload, entering main() with no supporting assembly code for startup. The Harvey port is not complete so it just panics but ... it gets started. We provide a standard payload function that takes a pointer argument and makes the jump from machine to supervisor mode; the days of kernels running in machine mode are over. We do some small tweaks to the virtual memory code. We temporarily disable two functions that won't work on some targets as register numbers changed between 1.7 and 1.9. Once lowrisc catches up we'll reenable them. We add the PAGETABLES to the memlayout.ld and use _pagetables in the virtual memory setup code. We now use the _stack and _estack from memlayout so we know where things are. As time goes on maybe we can kill all the magic numbers. Change-Id: I6caadfa9627fa35e31580492be01d4af908d31d9 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/17058 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com>
2016-08-23arch/riscv: Map the kernel space into RAM (2GiB+)Jonathan Neuschäfer
Change-Id: I273e9d20e02f0333f28e0fc2adcc7940578ea93e Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/16263 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-08-23arch/riscv: Implement the SBI againJonathan Neuschäfer
Not all SBI calls are implemented, but it's enough to see a couple dozen lines of Linux boot output. It should also be noted that the SBI is still in flux: https://groups.google.com/a/groups.riscv.org/forum/#!topic/sw-dev/6oNhlW0OFKM Change-Id: I80e4fe508336d6428ca7136bc388fbc3cda4f1e4 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/16119 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-08-23arch/riscv: Enable U-mode/S-mode counters (stime, etc.)Jonathan Neuschäfer
Change-Id: Ie62f60b2e237fa4921384e3894569ae29639f563 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/16262 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-08-23arch/riscv: Delegate exceptions to supervisor mode if appropriateJonathan Neuschäfer
Change-Id: I1c8127412af0f9acc5b5520dc324ac145e59a4bd Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/16160 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-08-23arch/riscv: Print the page table structure after constructionJonathan Neuschäfer
A new Kconfig option, DEBUG_PRINT_PAGE_TABLES, is added to control this behaviour. It is currently only available on RISC-V, but other architectures can use it, too, should the need arise. Change-Id: I52a863d8bc814ab3ed3a1f141d0a77edc6e4044d Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/16015 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-08-11arch/riscv: Fix the page table setup codeJonathan Neuschäfer
In particular: - Fix the condition of the loop that fills the mid-level page table - Adhere to the format of sptbr Change-Id: I575093445edfdf5a8f54b0f8622ff0e89f77ccec Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/16120 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-08-11arch/riscv: Update encoding.h and dependent filesJonathan Neuschäfer
I copied it from commit e10d2def7d of spike and made sure the copyright header is still there. Change-Id: Ie8b56cd2f4855b97d36a112a195866f4ff0feec5 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/15832 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2016-08-02arch/riscv: Add include/arch/barrier.hJonathan Neuschäfer
mb() is used in src/arch/riscv/ and src/mainboard/emulation/*-riscv/. It is currently provided by atomic.h, but I think it fits better into barrier.h. The "fence" instruction represents a full memory fence, as opposed to variants such as "fence r, rw" which represent a partial fence. An operating system might want to use precisely the right fence, but coreboot doesn't need this level of performance at the cost of simplicity. Change-Id: I8d33ef32ad31e8fda38f6a5183210e7bd6c65815 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/15830 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-07-28arch/riscv: Only initialize virtual memory if it's availableJonathan Neuschäfer
And do the detection just before the initialization. Change-Id: I9a52430262f799baa298dc4f4ea459880abe250e Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/15831 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2016-07-18arch/riscv: Remove enter_supervisorJonathan Neuschäfer
This function is unused since coreboot starts payloads in machine mode, and it uses the obsolete eret instruction. Change-Id: I98d7d0de5a3959821c21a0ba4319efb610fdefde Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/15729 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2015-10-31tree: drop last paragraph of GPL copyright headerPatrick Georgi
It encourages users from writing to the FSF without giving an address. Linux also prefers to drop that and their checkpatch.pl (that we imported) looks out for that. This is the result of util/scripts/no-fsf-addresses.sh with no further editing. Change-Id: Ie96faea295fe001911d77dbc51e9a6789558fbd6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/11888 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2015-09-16riscv-virtual-memory: move page tables into virtual address spaceThaminda Edirisooriya
If we use a linux payload/any payload that wants to manage virtual memory, and the payload is a supervisor (thus requiring virtual addressing before being started), we need to make sure that the page table is mapped into the virtual address space. Move the start address of the tables so the payload can manage virtual memory. Change-Id: I1d99e46f38a38a163fb1c7c517b1abca80cde0dc Signed-off-by: Thaminda Edirisooriya <thaminda@google.com> Reviewed-on: http://review.coreboot.org/11621 Tested-by: build bot (Jenkins)
2015-09-10riscv-virtual-memory: Add virtual memory setupThaminda Edirisooriya
Execution in supervisor level code in RISCV requires early setup of virtual memory. Add initialization calls in src/arch/riscv/virtual_memory.c to implement the required page table setup, and helper functions to use when jumping to the payload correctly in riscv. Change-Id: I46e080e0ee8dc13277d567dcd4bf0f61a4507b76 Signed-off-by: Thaminda Edirisooriya <thaminda@google.com> Reviewed-on: http://review.coreboot.org/11369 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
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