From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> Add DT binding documentation for L2 cache controller found on RZ/Five SoC. The Renesas RZ/Five microprocessor includes a RISC-V CPU Core (AX45MP Single) from Andes. The AX45MP core has an L2 cache controller, this patch describes the L2 cache block. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> --- RFC v3 -> v4 * Dropped l2 cache configuration parameters * s/larger/large * Added minItems/maxItems for andestech,pma-regions --- .../cache/andestech,ax45mp-cache.yaml | 93 +++++++++++++++++++ .../cache/andestech,ax45mp-cache.h | 38 ++++++++ 2 files changed, 131 insertions(+) create mode 100644 Documentation/devicetree/bindings/cache/andestech,ax45mp-cache.yaml create mode 100644 include/dt-bindings/cache/andestech,ax45mp-cache.h diff --git a/Documentation/devicetree/bindings/cache/andestech,ax45mp-cache.yaml b/Documentation/devicetree/bindings/cache/andestech,ax45mp-cache.yaml new file mode 100644 index 000000000000..bf255b177d0a --- /dev/null +++ b/Documentation/devicetree/bindings/cache/andestech,ax45mp-cache.yaml @@ -0,0 +1,93 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright (C) 2022 Renesas Electronics Corp. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/cache/andestech,ax45mp-cache.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Andestech AX45MP L2 Cache Controller + +maintainers: + - Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> + +description: + A level-2 cache (L2C) is used to improve the system performance by providing + a large amount of cache line entries and reasonable access delays. The L2C + is shared between cores, and a non-inclusive non-exclusive policy is used. + +select: + properties: + compatible: + contains: + enum: + - andestech,ax45mp-cache + + required: + - compatible + +properties: + compatible: + items: + - const: andestech,ax45mp-cache + - const: cache + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + cache-line-size: + const: 64 + + cache-level: + const: 2 + + cache-sets: + const: 1024 + + cache-size: + enum: [131072, 262144, 524288, 1048576, 2097152] + + cache-unified: true + + next-level-cache: true + + andestech,pma-regions: + $ref: /schemas/types.yaml#/definitions/uint32-matrix + minItems: 1 + maxItems: 16 + items: + minItems: 3 + maxItems: 3 + description: Optional array of memory regions to be set in the PMA. + +additionalProperties: false + +required: + - compatible + - cache-line-size + - cache-level + - cache-sets + - cache-size + - cache-unified + - interrupts + - reg + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/cache/andestech,ax45mp-cache.h> + + cache-controller@2010000 { + reg = <0x13400000 0x100000>; + compatible = "andestech,ax45mp-cache", "cache"; + interrupts = <508 IRQ_TYPE_LEVEL_HIGH>; + cache-line-size = <64>; + cache-level = <2>; + cache-sets = <1024>; + cache-size = <262144>; + cache-unified; + andestech,pma-regions = <0x58000000 0x08000000 + (AX45MP_PMACFG_ETYP_NAPOT | AX45MP_PMACFG_MTYP_MEM_NON_CACHE_BUF)>; + }; diff --git a/include/dt-bindings/cache/andestech,ax45mp-cache.h b/include/dt-bindings/cache/andestech,ax45mp-cache.h new file mode 100644 index 000000000000..aa1cad24075d --- /dev/null +++ b/include/dt-bindings/cache/andestech,ax45mp-cache.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* + * This header provides constants for Andes AX45MP PMA configuration + * + * Copyright (C) 2022 Renesas Electronics Corp. + */ + +#ifndef __DT_BINDINGS_ANDESTECH_AX45MP_CACHE_H +#define __DT_BINDINGS_ANDESTECH_AX45MP_CACHE_H + +/* OFF: PMA entry is disabled */ +#define AX45MP_PMACFG_ETYP_DISABLED 0 +/* Naturally aligned power of 2 region */ +#define AX45MP_PMACFG_ETYP_NAPOT 3 + +/* Device, Non-bufferable */ +#define AX45MP_PMACFG_MTYP_DEV_NON_BUF (0 << 2) +/* Device, bufferable */ +#define AX45MP_PMACFG_MTYP_DEV_BUF (1 << 2) +/* Memory, Non-cacheable, Non-bufferable */ +#define AX45MP_PMACFG_MTYP_MEM_NON_CACHE_NON_BUF (2 << 2) +/* Memory, Non-cacheable, Bufferable */ +#define AX45MP_PMACFG_MTYP_MEM_NON_CACHE_BUF (3 << 2) +/* Memory, Write-back, No-allocate */ +#define AX45MP_PMACFG_MTYP_MEM_WB_NA (8 << 2) +/* Memory, Write-back, Read-allocate */ +#define AX45MP_PMACFG_MTYP_MEM_WB_RA (9 << 2) +/* Memory, Write-back, Write-allocate */ +#define AX45MP_PMACFG_MTYP_MEM_WB_WA (10 << 2) +/* Memory, Write-back, Read and Write-allocate */ +#define AX45MP_PMACFG_MTYP_MEM_WB_R_WA (11 << 2) + +/* AMO instructions are supported */ +#define AX45MP_PMACFG_NAMO_AMO_SUPPORT (0 << 6) +/* AMO instructions are not supported */ +#define AX45MP_PMACFG_NAMO_AMO_NO_SUPPORT (1 << 6) + +#endif /* __DT_BINDINGS_ANDESTECH_AX45MP_CACHE_H */ -- 2.25.1
