RISC-V: Add auxiliary files
To support a new architecture we need to provide a few helper functions for memory, cache, timer, etc support. This patch adds the remainders of those. Some bits are still disabled, as I couldn't guarantee that we're always running on models / in modes where the respective hardware is available. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Alexander Graf
Daniel Kiper
parent
e0d32cca1d
commit
861212333e
9 changed files with 319 additions and 0 deletions
63
grub-core/kern/riscv/cache.c
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63
grub-core/kern/riscv/cache.c
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/cache.h>
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#include <grub/misc.h>
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static grub_int64_t dlinesz;
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static grub_int64_t ilinesz;
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/* Prototypes for asm functions. */
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void grub_arch_clean_dcache_range (grub_addr_t beg, grub_addr_t end,
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grub_size_t line_size);
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void grub_arch_invalidate_icache_range (grub_addr_t beg, grub_addr_t end,
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grub_size_t line_size);
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static void
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probe_caches (void)
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{
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/* TODO */
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dlinesz = 32;
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ilinesz = 32;
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}
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void
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grub_arch_sync_caches (void *address, grub_size_t len)
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{
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grub_size_t start, end, max_align;
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if (dlinesz == 0)
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probe_caches();
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if (dlinesz == 0)
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grub_fatal ("Unknown cache line size!");
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max_align = dlinesz > ilinesz ? dlinesz : ilinesz;
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start = ALIGN_DOWN ((grub_size_t) address, max_align);
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end = ALIGN_UP ((grub_size_t) address + len, max_align);
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grub_arch_clean_dcache_range (start, end, dlinesz);
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grub_arch_invalidate_icache_range (start, end, ilinesz);
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}
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void
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grub_arch_sync_dma_caches (volatile void *address __attribute__((unused)),
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grub_size_t len __attribute__((unused)))
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{
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/* DMA incoherent devices not supported yet */
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}
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44
grub-core/kern/riscv/cache_flush.S
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44
grub-core/kern/riscv/cache_flush.S
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@ -0,0 +1,44 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/symbol.h>
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.file "cache_flush.S"
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.text
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/*
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* Simple cache maintenance functions
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*/
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/*
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* a0 - *beg (inclusive)
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* a1 - *end (exclusive)
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* a2 - line size
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*/
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FUNCTION(grub_arch_clean_dcache_range)
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/* TODO */
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ret
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/*
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* a0 - *beg (inclusive)
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* a1 - *end (exclusive)
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* a2 - line size
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*/
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FUNCTION(grub_arch_invalidate_icache_range)
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fence.i
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ret
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76
grub-core/kern/riscv/efi/init.c
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76
grub-core/kern/riscv/efi/init.c
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@ -0,0 +1,76 @@
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/* init.c - initialize a riscv-based EFI system */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/env.h>
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#include <grub/kernel.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/time.h>
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#include <grub/efi/efi.h>
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#include <grub/loader.h>
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static grub_uint64_t timer_frequency_in_khz;
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static grub_uint64_t
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grub_efi_get_time_ms (void)
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{
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grub_uint64_t tmr;
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#if __riscv_xlen == 64
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asm volatile ("rdcycle %0" : "=r" (tmr));
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#else
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grub_uint32_t lo, hi, tmp;
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asm volatile (
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"1:\n"
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"rdcycleh %0\n"
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"rdcycle %1\n"
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"rdcycleh %2\n"
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"bne %0, %2, 1b"
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: "=&r" (hi), "=&r" (lo), "=&r" (tmp));
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tmr = ((grub_uint64_t)hi << 32) | lo;
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#endif
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return tmr / timer_frequency_in_khz;
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}
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void
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grub_machine_init (void)
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{
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grub_uint64_t time_before, time_after;
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grub_efi_init ();
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/* Calculate timer frequency */
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timer_frequency_in_khz = 1;
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time_before = grub_efi_get_time_ms();
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grub_efi_stall(1000);
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time_after = grub_efi_get_time_ms();
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timer_frequency_in_khz = time_after - time_before;
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grub_install_get_time_ms (grub_efi_get_time_ms);
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}
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void
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grub_machine_fini (int flags)
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{
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if (!(flags & GRUB_LOADER_FLAG_NORETURN))
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return;
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grub_efi_fini ();
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}
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6
include/grub/riscv32/efi/memory.h
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6
include/grub/riscv32/efi/memory.h
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#ifndef GRUB_MEMORY_CPU_HEADER
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#include <grub/efi/memory.h>
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#define GRUB_EFI_MAX_USABLE_ADDRESS 0xffffffffUL
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#endif /* ! GRUB_MEMORY_CPU_HEADER */
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28
include/grub/riscv32/time.h
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28
include/grub/riscv32/time.h
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef KERNEL_CPU_TIME_HEADER
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#define KERNEL_CPU_TIME_HEADER 1
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static __inline void
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grub_cpu_idle (void)
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{
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/* TODO */
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}
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#endif /* ! KERNEL_CPU_TIME_HEADER */
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34
include/grub/riscv32/types.h
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34
include/grub/riscv32/types.h
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_TYPES_CPU_HEADER
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#define GRUB_TYPES_CPU_HEADER 1
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/* The size of void *. */
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#define GRUB_TARGET_SIZEOF_VOID_P 4
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/* The size of long. */
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#define GRUB_TARGET_SIZEOF_LONG 4
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/* currently only support little-endian. */
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#undef GRUB_TARGET_WORDS_BIGENDIAN
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/* Unaligned accesses can be very slow, so avoid them */
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#undef GRUB_HAVE_UNALIGNED_ACCESS
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#endif /* ! GRUB_TYPES_CPU_HEADER */
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6
include/grub/riscv64/efi/memory.h
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6
include/grub/riscv64/efi/memory.h
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#ifndef GRUB_MEMORY_CPU_HEADER
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#include <grub/efi/memory.h>
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#define GRUB_EFI_MAX_USABLE_ADDRESS 0xffffffffffffULL
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#endif /* ! GRUB_MEMORY_CPU_HEADER */
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28
include/grub/riscv64/time.h
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28
include/grub/riscv64/time.h
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef KERNEL_CPU_TIME_HEADER
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#define KERNEL_CPU_TIME_HEADER 1
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static __inline void
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grub_cpu_idle (void)
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{
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/* TODO */
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}
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#endif /* ! KERNEL_CPU_TIME_HEADER */
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34
include/grub/riscv64/types.h
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34
include/grub/riscv64/types.h
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2018 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_TYPES_CPU_HEADER
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#define GRUB_TYPES_CPU_HEADER 1
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/* The size of void *. */
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#define GRUB_TARGET_SIZEOF_VOID_P 8
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/* The size of long. */
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#define GRUB_TARGET_SIZEOF_LONG 8
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/* currently only support little-endian. */
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#undef GRUB_TARGET_WORDS_BIGENDIAN
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/* Unaligned accesses can be very slow, so avoid them */
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#undef GRUB_HAVE_UNALIGNED_ACCESS
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#endif /* ! GRUB_TYPES_CPU_HEADER */
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