Cell: Initial pass at unified data cache

1 files changed, 100 insertions, 0 deletions

diff --git a/src/gallium/drivers/cell/spu/spu_dcache.c b/src/gallium/drivers/cell/spu/spu_dcache.c
new file mode 100644
index 0000000000..9e30e17880
--- /dev/null
+++ b/src/gallium/drivers/cell/spu/spu_dcache.c
@@ -0,0 +1,100 @@
+/*
+ * (C) Copyright IBM Corporation 2008
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * AUTHORS, COPYRIGHT HOLDERS, AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "spu_main.h"
+#include "spu_dcache.h"
+
+#define CACHE_NAME            data
+#define CACHED_TYPE           qword
+#define CACHE_TYPE            CACHE_TYPE_RO
+#define CACHE_SET_TAGID(set)  TAG_VERTEX_BUFFER
+#define CACHE_LOG2NNWAY       2
+#define CACHE_LOG2NSETS       6
+#include <cache-api.h>
+
+/* Yes folks, this is ugly.
+ */
+#undef CACHE_NWAY
+#undef CACHE_NSETS
+#define CACHE_NAME            data
+#define CACHE_NWAY            4
+#define CACHE_NSETS           (1U << 6)
+
+
+/**
+ * Fetch between arbitrary number of bytes from an unaligned address
+ */
+void
+spu_dcache_fetch_unaligned(qword *dst, unsigned ea, unsigned size)
+{
+   const int shift = ea & 0x0f;
+   const unsigned aligned_start_ea = ea & ~0x0f;
+   const unsigned aligned_end_ea = (ea + size) & ~0x0f;
+   const unsigned num_entries = ((aligned_end_ea - aligned_start_ea) / 16) + 1;
+   unsigned i;
+
+
+   if (shift == 0) {
+      /* Data is already aligned.  Fetch directly into the destination buffer.
+       */
+      for (i = 0; i < num_entries; i++) {
+         dst[i] = cache_rd(data, (ea & ~0x0f) + (i * 16));
+      }
+   } else {
+      qword tmp[2] ALIGN16_ATTRIB;
+
+
+      tmp[0] = cache_rd(data, (ea & ~0x0f));
+      for (i = 0; i < (num_entries & ~1); i++) {
+         const unsigned curr = i & 1;
+         const unsigned next = curr ^ 1;
+
+         tmp[next] = cache_rd(data, (ea & ~0x0f) + (next * 16));
+
+         dst[i] = si_or((qword) spu_slqwbyte(tmp[curr], shift),
+                        (qword) spu_rlmaskqwbyte(tmp[next], shift - 16));
+      }
+
+      if (i < num_entries) {
+         dst[i] = si_or((qword) spu_slqwbyte(tmp[(i & 1)], shift),
+                        si_il(0));
+      }
+   }
+}
+
+
+void
+spu_dcache_mark_dirty(unsigned ea, unsigned size)
+{
+   unsigned i;
+
+   (void) ea;
+   (void) size;
+
+   /* Invalidate the whole cache for now.
+    */
+   for (i = 0; i < (CACHE_NWAY * CACHE_NSETS); i++) {
+      CACHELINE_CLEARVALID(i);
+   }
+}