change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/arch/arc/mm/cache.c
..
..
@@ -1,12 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * ARC Cache Management
3
4
  *
4
5
  * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
5
6
  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
6
- *
7
- * This program is free software; you can redistribute it and/or modify
8
- * it under the terms of the GNU General Public License version 2 as
9
- * published by the Free Software Foundation.
10
7
  */
11
8
 
12
9
 #include <linux/module.h>
..
..
@@ -113,10 +110,24 @@
113
110
 	}
114
111
 
115
112
 	READ_BCR(ARC_REG_CLUSTER_BCR, cbcr);
116
-	if (cbcr.c)
113
+	if (cbcr.c) {
117
114
 		ioc_exists = 1;
118
-	else
115
+
116
+		/*
117
+		 * As for today we don't support both IOC and ZONE_HIGHMEM enabled
118
+		 * simultaneously. This happens because as of today IOC aperture covers
119
+		 * only ZONE_NORMAL (low mem) and any dma transactions outside this
120
+		 * region won't be HW coherent.
121
+		 * If we want to use both IOC and ZONE_HIGHMEM we can use
122
+		 * bounce_buffer to handle dma transactions to HIGHMEM.
123
+		 * Also it is possible to modify dma_direct cache ops or increase IOC
124
+		 * aperture size if we are planning to use HIGHMEM without PAE.
125
+		 */
126
+		if (IS_ENABLED(CONFIG_HIGHMEM) || is_pae40_enabled())
127
+			ioc_enable = 0;
128
+	} else {
119
129
 		ioc_enable = 0;
130
+	}
120
131
 
121
132
 	/* HS 2.0 didn't have AUX_VOL */
122
133
 	if (cpuinfo_arc700[cpu].core.family > 0x51) {
..
..
@@ -1158,19 +1169,6 @@
1158
1169
 	if (!ioc_enable)
1159
1170
 		return;
1160
1171
 
1161
-	/*
1162
-	 * As for today we don't support both IOC and ZONE_HIGHMEM enabled
1163
-	 * simultaneously. This happens because as of today IOC aperture covers
1164
-	 * only ZONE_NORMAL (low mem) and any dma transactions outside this
1165
-	 * region won't be HW coherent.
1166
-	 * If we want to use both IOC and ZONE_HIGHMEM we can use
1167
-	 * bounce_buffer to handle dma transactions to HIGHMEM.
1168
-	 * Also it is possible to modify dma_direct cache ops or increase IOC
1169
-	 * aperture size if we are planning to use HIGHMEM without PAE.
1170
-	 */
1171
-	if (IS_ENABLED(CONFIG_HIGHMEM))
1172
-		panic("IOC and HIGHMEM can't be used simultaneously");
1173
-
1174
1172
 	/* Flush + invalidate + disable L1 dcache */
1175
1173
 	__dc_disable();
1176
1174
 
..
..
@@ -1294,7 +1292,7 @@
1294
1292
 	/*
1295
1293
 	 * In case of IOC (say IOC+SLC case), pointers above could still be set
1296
1294
 	 * but end up not being relevant as the first function in chain is not
1297
-	 * called at all for @dma_direct_ops
1295
+	 * called at all for devices using coherent DMA.
1298
1296
 	 *     arch_sync_dma_for_cpu() -> dma_cache_*() -> __dma_cache_*()
1299
1297
 	 */
1300
1298
 }