2 * arch/arm/mm/cache-l2x0.c - L210/L220 cache controller support
4 * Copyright (C) 2007 ARM Limited
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #include <linux/init.h>
21 #include <asm/cacheflush.h>
23 #include <asm/hardware/cache-l2x0.h>
25 #define CACHE_LINE_SIZE 32
27 static void __iomem *l2x0_base;
29 static inline void sync_writel(unsigned long val, unsigned long reg,
30 unsigned long complete_mask)
32 writel(val, l2x0_base + reg);
33 /* wait for the operation to complete */
34 while (readl(l2x0_base + reg) & complete_mask)
38 static inline void cache_sync(void)
40 sync_writel(0, L2X0_CACHE_SYNC, 1);
43 static inline void l2x0_inv_all(void)
45 /* invalidate all ways */
46 sync_writel(0xff, L2X0_INV_WAY, 0xff);
50 static void l2x0_inv_range(unsigned long start, unsigned long end)
54 start &= ~(CACHE_LINE_SIZE - 1);
55 for (addr = start; addr < end; addr += CACHE_LINE_SIZE)
56 sync_writel(addr, L2X0_INV_LINE_PA, 1);
60 static void l2x0_clean_range(unsigned long start, unsigned long end)
64 start &= ~(CACHE_LINE_SIZE - 1);
65 for (addr = start; addr < end; addr += CACHE_LINE_SIZE)
66 sync_writel(addr, L2X0_CLEAN_LINE_PA, 1);
70 static void l2x0_flush_range(unsigned long start, unsigned long end)
74 start &= ~(CACHE_LINE_SIZE - 1);
75 for (addr = start; addr < end; addr += CACHE_LINE_SIZE)
76 sync_writel(addr, L2X0_CLEAN_INV_LINE_PA, 1);
80 void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask)
87 writel(0, l2x0_base + L2X0_CTRL);
89 aux = readl(l2x0_base + L2X0_AUX_CTRL);
92 writel(aux, l2x0_base + L2X0_AUX_CTRL);
97 writel(1, l2x0_base + L2X0_CTRL);
99 outer_cache.inv_range = l2x0_inv_range;
100 outer_cache.clean_range = l2x0_clean_range;
101 outer_cache.flush_range = l2x0_flush_range;
103 printk(KERN_INFO "L2X0 cache controller enabled\n");