1 /* 2 * (C) Copyright 2010 3 * Texas Instruments, <www.ti.com> 4 * Aneesh V <aneesh@ti.com> 5 * 6 * See file CREDITS for list of people who contributed to this 7 * project. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of 12 * the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 22 * MA 02111-1307 USA 23 */ 24 #include <linux/types.h> 25 #include <asm/io.h> 26 #include <asm/armv7.h> 27 #include <asm/pl310.h> 28 #include <config.h> 29 #include <common.h> 30 31 struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE; 32 33 static void pl310_cache_sync(void) 34 { 35 writel(0, &pl310->pl310_cache_sync); 36 } 37 38 static void pl310_background_op_all_ways(u32 *op_reg) 39 { 40 u32 assoc_16, associativity, way_mask; 41 42 assoc_16 = readl(&pl310->pl310_aux_ctrl) & 43 PL310_AUX_CTRL_ASSOCIATIVITY_MASK; 44 if (assoc_16) 45 associativity = 16; 46 else 47 associativity = 8; 48 49 way_mask = (1 << associativity) - 1; 50 /* Invalidate all ways */ 51 writel(way_mask, op_reg); 52 /* Wait for all ways to be invalidated */ 53 while (readl(op_reg) && way_mask) 54 ; 55 pl310_cache_sync(); 56 } 57 58 void v7_outer_cache_inval_all(void) 59 { 60 pl310_background_op_all_ways(&pl310->pl310_inv_way); 61 } 62 63 void v7_outer_cache_flush_all(void) 64 { 65 pl310_background_op_all_ways(&pl310->pl310_clean_inv_way); 66 } 67 68 /* Flush(clean invalidate) memory from start to stop-1 */ 69 void v7_outer_cache_flush_range(u32 start, u32 stop) 70 { 71 /* PL310 currently supports only 32 bytes cache line */ 72 u32 pa, line_size = 32; 73 74 /* 75 * Align to the beginning of cache-line - this ensures that 76 * the first 5 bits are 0 as required by PL310 TRM 77 */ 78 start &= ~(line_size - 1); 79 80 for (pa = start; pa < stop; pa = pa + line_size) 81 writel(pa, &pl310->pl310_clean_inv_line_pa); 82 83 pl310_cache_sync(); 84 } 85 86 /* invalidate memory from start to stop-1 */ 87 void v7_outer_cache_inval_range(u32 start, u32 stop) 88 { 89 /* PL310 currently supports only 32 bytes cache line */ 90 u32 pa, line_size = 32; 91 92 /* 93 * If start address is not aligned to cache-line do not 94 * invalidate the first cache-line 95 */ 96 if (start & (line_size - 1)) { 97 printf("ERROR: %s - start address is not aligned - 0x%08x\n", 98 __func__, start); 99 /* move to next cache line */ 100 start = (start + line_size - 1) & ~(line_size - 1); 101 } 102 103 /* 104 * If stop address is not aligned to cache-line do not 105 * invalidate the last cache-line 106 */ 107 if (stop & (line_size - 1)) { 108 printf("ERROR: %s - stop address is not aligned - 0x%08x\n", 109 __func__, stop); 110 /* align to the beginning of this cache line */ 111 stop &= ~(line_size - 1); 112 } 113 114 for (pa = start; pa < stop; pa = pa + line_size) 115 writel(pa, &pl310->pl310_inv_line_pa); 116 117 pl310_cache_sync(); 118 } 119