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RISC-V: Add auxiliary files

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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 2019-02-12 11:31:05 +01:00 • committed by Vincent Batts
parent 893ed83b2e
commit 8ce194d068
9 changed files with 319 additions and 0 deletions
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63
grub-core/kern/riscv/cache.c Normal file
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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2018 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/cache.h>
#include <grub/misc.h>
static grub_int64_t dlinesz;
static grub_int64_t ilinesz;
/* Prototypes for asm functions. */
void grub_arch_clean_dcache_range (grub_addr_t beg, grub_addr_t end,
grub_size_t line_size);
void grub_arch_invalidate_icache_range (grub_addr_t beg, grub_addr_t end,
grub_size_t line_size);
static void
probe_caches (void)
{
/* TODO */
dlinesz = 32;
ilinesz = 32;
}
void
grub_arch_sync_caches (void *address, grub_size_t len)
{
grub_size_t start, end, max_align;
if (dlinesz == 0)
probe_caches();
if (dlinesz == 0)
grub_fatal ("Unknown cache line size!");
max_align = dlinesz > ilinesz ? dlinesz : ilinesz;
start = ALIGN_DOWN ((grub_size_t) address, max_align);
end = ALIGN_UP ((grub_size_t) address + len, max_align);
grub_arch_clean_dcache_range (start, end, dlinesz);
grub_arch_invalidate_icache_range (start, end, ilinesz);
}
void
grub_arch_sync_dma_caches (volatile void *address __attribute__((unused)),
grub_size_t len __attribute__((unused)))
{
/* DMA incoherent devices not supported yet */
}