Masahiro Yamada | bb2ff9d | 2014-10-03 19:21:06 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012-2014 Panasonic Corporation |
Masahiro Yamada | c0a68cc | 2015-03-23 00:07:31 +0900 | [diff] [blame] | 3 | * Copyright (C) 2015 Socionext Inc. |
| 4 | * Author: Masahiro Yamada <yamada.masahiro@socionext.com> |
Masahiro Yamada | bb2ff9d | 2014-10-03 19:21:06 +0900 | [diff] [blame] | 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0+ |
| 7 | */ |
| 8 | |
| 9 | #include <common.h> |
| 10 | #include <asm/io.h> |
| 11 | #include <asm/armv7.h> |
Masahiro Yamada | 95387e2 | 2015-02-27 02:26:44 +0900 | [diff] [blame] | 12 | #include <mach/ssc-regs.h> |
Masahiro Yamada | bb2ff9d | 2014-10-03 19:21:06 +0900 | [diff] [blame] | 13 | |
| 14 | #ifdef CONFIG_UNIPHIER_L2CACHE_ON |
| 15 | static void uniphier_cache_maint_all(u32 operation) |
| 16 | { |
| 17 | /* try until the command is successfully set */ |
| 18 | do { |
| 19 | writel(SSCOQM_S_ALL | SSCOQM_CE | operation, SSCOQM); |
| 20 | } while (readl(SSCOPPQSEF) & (SSCOPPQSEF_FE | SSCOPPQSEF_OE)); |
| 21 | |
| 22 | /* wait until the operation is completed */ |
| 23 | while (readl(SSCOLPQS) != SSCOLPQS_EF) |
| 24 | ; |
| 25 | |
| 26 | /* clear the complete notification flag */ |
| 27 | writel(SSCOLPQS_EF, SSCOLPQS); |
| 28 | |
| 29 | writel(SSCOPE_CM_SYNC, SSCOPE); /* drain internal buffers */ |
| 30 | readl(SSCOPE); /* need a read back to confirm */ |
| 31 | } |
| 32 | |
| 33 | void v7_outer_cache_flush_all(void) |
| 34 | { |
| 35 | uniphier_cache_maint_all(SSCOQM_CM_WB_INV); |
| 36 | } |
| 37 | |
| 38 | void v7_outer_cache_inval_all(void) |
| 39 | { |
| 40 | uniphier_cache_maint_all(SSCOQM_CM_INV); |
| 41 | } |
| 42 | |
| 43 | static void __uniphier_cache_maint_range(u32 start, u32 size, u32 operation) |
| 44 | { |
| 45 | /* try until the command is successfully set */ |
| 46 | do { |
| 47 | writel(SSCOQM_S_ADDRESS | SSCOQM_CE | operation, SSCOQM); |
| 48 | writel(start, SSCOQAD); |
| 49 | writel(size, SSCOQSZ); |
| 50 | |
| 51 | } while (readl(SSCOPPQSEF) & (SSCOPPQSEF_FE | SSCOPPQSEF_OE)); |
| 52 | |
| 53 | /* wait until the operation is completed */ |
| 54 | while (readl(SSCOLPQS) != SSCOLPQS_EF) |
| 55 | ; |
| 56 | |
| 57 | /* clear the complete notification flag */ |
| 58 | writel(SSCOLPQS_EF, SSCOLPQS); |
| 59 | } |
| 60 | |
| 61 | static void uniphier_cache_maint_range(u32 start, u32 end, u32 operation) |
| 62 | { |
| 63 | u32 size; |
| 64 | |
| 65 | /* |
| 66 | * If start address is not aligned to cache-line, |
| 67 | * do cache operation for the first cache-line |
| 68 | */ |
| 69 | start = start & ~(SSC_LINE_SIZE - 1); |
| 70 | |
| 71 | if (start == 0 && end >= (u32)(-SSC_LINE_SIZE)) { |
| 72 | /* this means cache operation for all range */ |
| 73 | uniphier_cache_maint_all(operation); |
| 74 | return; |
| 75 | } |
| 76 | |
| 77 | /* |
| 78 | * If end address is not aligned to cache-line, |
| 79 | * do cache operation for the last cache-line |
| 80 | */ |
| 81 | size = (end - start + SSC_LINE_SIZE - 1) & ~(SSC_LINE_SIZE - 1); |
| 82 | |
| 83 | while (size) { |
| 84 | u32 chunk_size = size > SSC_RANGE_OP_MAX_SIZE ? |
| 85 | SSC_RANGE_OP_MAX_SIZE : size; |
| 86 | __uniphier_cache_maint_range(start, chunk_size, operation); |
| 87 | |
| 88 | start += chunk_size; |
| 89 | size -= chunk_size; |
| 90 | } |
| 91 | |
| 92 | writel(SSCOPE_CM_SYNC, SSCOPE); /* drain internal buffers */ |
| 93 | readl(SSCOPE); /* need a read back to confirm */ |
| 94 | } |
| 95 | |
| 96 | void v7_outer_cache_flush_range(u32 start, u32 end) |
| 97 | { |
| 98 | uniphier_cache_maint_range(start, end, SSCOQM_CM_WB_INV); |
| 99 | } |
| 100 | |
| 101 | void v7_outer_cache_inval_range(u32 start, u32 end) |
| 102 | { |
| 103 | uniphier_cache_maint_range(start, end, SSCOQM_CM_INV); |
| 104 | } |
| 105 | |
| 106 | void v7_outer_cache_enable(void) |
| 107 | { |
| 108 | u32 tmp; |
| 109 | tmp = readl(SSCC); |
| 110 | tmp |= SSCC_ON; |
| 111 | writel(tmp, SSCC); |
| 112 | } |
| 113 | #endif |
| 114 | |
| 115 | void v7_outer_cache_disable(void) |
| 116 | { |
| 117 | u32 tmp; |
| 118 | tmp = readl(SSCC); |
| 119 | tmp &= ~SSCC_ON; |
| 120 | writel(tmp, SSCC); |
| 121 | } |
| 122 | |
Masahiro Yamada | bb2ff9d | 2014-10-03 19:21:06 +0900 | [diff] [blame] | 123 | void enable_caches(void) |
| 124 | { |
Masahiro Yamada | bb2ff9d | 2014-10-03 19:21:06 +0900 | [diff] [blame] | 125 | dcache_enable(); |
Masahiro Yamada | bb2ff9d | 2014-10-03 19:21:06 +0900 | [diff] [blame] | 126 | } |