1 /* 2 * Copyright (c) 2023 Carlo Caione <ccaione@baylibre.com> 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 #ifndef ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_H_ 7 #define ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_H_ 8 9 #include <zephyr/sys/util_macro.h> 10 11 /* 12 * Generic memory attributes. 13 * 14 * Generic memory attributes that should be common to all architectures. 15 */ 16 #define DT_MEM_ATTR_MASK GENMASK(15, 0) 17 #define DT_MEM_ATTR_GET(x) ((x) & DT_MEM_ATTR_MASK) 18 #define DT_MEM_ATTR_SHIFT (0) 19 20 #define DT_MEM_CACHEABLE BIT(0) /* cacheable */ 21 #define DT_MEM_NON_VOLATILE BIT(1) /* non-volatile */ 22 #define DT_MEM_OOO BIT(2) /* out-of-order */ 23 #define DT_MEM_DMA BIT(3) /* DMA-able */ 24 #define DT_MEM_UNKNOWN BIT(15) /* must be last */ 25 /* to be continued */ 26 27 /* 28 * Software specific memory attributes. 29 * 30 * Software can define their own memory attributes if needed using the 31 * provided mask. 32 */ 33 #define DT_MEM_SW_ATTR_MASK GENMASK(19, 16) 34 #define DT_MEM_SW_ATTR_GET(x) ((x) & DT_MEM_SW_ATTR_MASK) 35 #define DT_MEM_SW_ATTR_SHIFT (16) 36 #define DT_MEM_SW_ATTR_UNKNOWN BIT(19) 37 38 /* 39 * Architecture specific memory attributes. 40 * 41 * Architectures can define their own memory attributes if needed using the 42 * provided mask. 43 * 44 * See for example `include/zephyr/dt-bindings/memory-attr/memory-attr-arm.h` 45 */ 46 #define DT_MEM_ARCH_ATTR_MASK GENMASK(31, 20) 47 #define DT_MEM_ARCH_ATTR_GET(x) ((x) & DT_MEM_ARCH_ATTR_MASK) 48 #define DT_MEM_ARCH_ATTR_SHIFT (20) 49 #define DT_MEM_ARCH_ATTR_UNKNOWN BIT(31) 50 51 #endif /* ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_H_ */ 52
