1 files changed, 0 insertions, 167 deletions
diff --git a/arch/tile/lib/cacheflush.c b/arch/tile/lib/cacheflush.c
deleted file mode 100644
index c1ebc1065fc1..000000000000
--- a/arch/tile/lib/cacheflush.c
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- *   This program 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, version 2.
- *
- *   This program 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, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-#include <linux/export.h>
-#include <asm/page.h>
-#include <asm/cacheflush.h>
-#include <arch/icache.h>
-#include <arch/spr_def.h>
-
-
-void __flush_icache_range(unsigned long start, unsigned long end)
-{
-	invalidate_icache((const void *)start, end - start, PAGE_SIZE);
-}
-
-
-/* Force a load instruction to issue. */
-static inline void force_load(char *p)
-{
-	*(volatile char *)p;
-}
-
-/*
- * Flush and invalidate a VA range that is homed remotely on a single
- * core (if "!hfh") or homed via hash-for-home (if "hfh"), waiting
- * until the memory controller holds the flushed values.
- */
-void __attribute__((optimize("omit-frame-pointer")))
-finv_buffer_remote(void *buffer, size_t size, int hfh)
-{
-	char *p, *base;
-	size_t step_size, load_count;
-
-	/*
-	 * On TILEPro the striping granularity is a fixed 8KB; on
-	 * TILE-Gx it is configurable, and we rely on the fact that
-	 * the hypervisor always configures maximum striping, so that
-	 * bits 9 and 10 of the PA are part of the stripe function, so
-	 * every 512 bytes we hit a striping boundary.
-	 *
-	 */
-#ifdef __tilegx__
-	const unsigned long STRIPE_WIDTH = 512;
-#else
-	const unsigned long STRIPE_WIDTH = 8192;
-#endif
-
-#ifdef __tilegx__
-	/*
-	 * On TILE-Gx, we must disable the dstream prefetcher before doing
-	 * a cache flush; otherwise, we could end up with data in the cache
-	 * that we don't want there.  Note that normally we'd do an mf
-	 * after the SPR write to disabling the prefetcher, but we do one
-	 * below, before any further loads, so there's no need to do it
-	 * here.
-	 */
-	uint_reg_t old_dstream_pf = __insn_mfspr(SPR_DSTREAM_PF);
-	__insn_mtspr(SPR_DSTREAM_PF, 0);
-#endif
-
-	/*
-	 * Flush and invalidate the buffer out of the local L1/L2
-	 * and request the home cache to flush and invalidate as well.
-	 */
-	__finv_buffer(buffer, size);
-
-	/*
-	 * Wait for the home cache to acknowledge that it has processed
-	 * all the flush-and-invalidate requests.  This does not mean
-	 * that the flushed data has reached the memory controller yet,
-	 * but it does mean the home cache is processing the flushes.
-	 */
-	__insn_mf();
-
-	/*
-	 * Issue a load to the last cache line, which can't complete
-	 * until all the previously-issued flushes to the same memory
-	 * controller have also completed.  If we weren't striping
-	 * memory, that one load would be sufficient, but since we may
-	 * be, we also need to back up to the last load issued to
-	 * another memory controller, which would be the point where
-	 * we crossed a "striping" boundary (the granularity of striping
-	 * across memory controllers).  Keep backing up and doing this
-	 * until we are before the beginning of the buffer, or have
-	 * hit all the controllers.
-	 *
-	 * If we are flushing a hash-for-home buffer, it's even worse.
-	 * Each line may be homed on a different tile, and each tile
-	 * may have up to four lines that are on different
-	 * controllers.  So as we walk backwards, we have to touch
-	 * enough cache lines to satisfy these constraints.  In
-	 * practice this ends up being close enough to "load from
-	 * every cache line on a full memory stripe on each
-	 * controller" that we simply do that, to simplify the logic.
-	 *
-	 * On TILE-Gx the hash-for-home function is much more complex,
-	 * with the upshot being we can't readily guarantee we have
-	 * hit both entries in the 128-entry AMT that were hit by any
-	 * load in the entire range, so we just re-load them all.
-	 * With larger buffers, we may want to consider using a hypervisor
-	 * trap to issue loads directly to each hash-for-home tile for
-	 * each controller (doing it from Linux would trash the TLB).
-	 */
-	if (hfh) {
-		step_size = L2_CACHE_BYTES;
-#ifdef __tilegx__
-		load_count = (size + L2_CACHE_BYTES - 1) / L2_CACHE_BYTES;
-#else
-		load_count = (STRIPE_WIDTH / L2_CACHE_BYTES) *
-			      (1 << CHIP_LOG_NUM_MSHIMS());
-#endif
-	} else {
-		step_size = STRIPE_WIDTH;
-		load_count = (1 << CHIP_LOG_NUM_MSHIMS());
-	}
-
-	/* Load the last byte of the buffer. */
-	p = (char *)buffer + size - 1;
-	force_load(p);
-
-	/* Bump down to the end of the previous stripe or cache line. */
-	p -= step_size;
-	p = (char *)((unsigned long)p | (step_size - 1));
-
-	/* Figure out how far back we need to go. */
-	base = p - (step_size * (load_count - 2));
-	if ((unsigned long)base < (unsigned long)buffer)
-		base = buffer;
-
-	/* Fire all the loads we need. */
-	for (; p >= base; p -= step_size)
-		force_load(p);
-
-	/*
-	 * Repeat, but with finv's instead of loads, to get rid of the
-	 * data we just loaded into our own cache and the old home L3.
-	 * The finv's are guaranteed not to actually flush the data in
-	 * the buffer back to their home, since we just read it, so the
-	 * lines are clean in cache; we will only invalidate those lines.
-	 */
-	p = (char *)buffer + size - 1;
-	__insn_finv(p);
-	p -= step_size;
-	p = (char *)((unsigned long)p | (step_size - 1));
-	for (; p >= base; p -= step_size)
-		__insn_finv(p);
-
-	/* Wait for these finv's (and thus the first finvs) to be done. */
-	__insn_mf();
-
-#ifdef __tilegx__
-	/* Reenable the prefetcher. */
-	__insn_mtspr(SPR_DSTREAM_PF, old_dstream_pf);
-#endif
-}
-EXPORT_SYMBOL_GPL(finv_buffer_remote);