1 files changed, 63 insertions, 0 deletions
diff --git a/grub-core/kern/riscv/cache.c b/grub-core/kern/riscv/cache.c
new file mode 100644
index 0000000..47777a0
--- /dev/null
+++ b/grub-core/kern/riscv/cache.c
@@ -0,0 +1,63 @@
+/*
+ *  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 */
+}