/usr/src/linux-headers-5.15.0-181/arch/m68k/include/asm
Edit: /usr/src/linux-headers-5.15.0-181/arch/m68k/include/asm/m53xxacr.h (3683B)
/* SPDX-License-Identifier: GPL-2.0 */
/****************************************************************************/
/*
* m53xxacr.h -- ColdFire version 3 core cache support
*
* (C) Copyright 2010, Greg Ungerer
*/
/****************************************************************************/
#ifndef m53xxacr_h
#define m53xxacr_h
/****************************************************************************/
/*
* All varients of the ColdFire using version 3 cores have a similar
* cache setup. They have a unified instruction and data cache, with
* configurable write-through or copy-back operation.
*/
/*
* Define the Cache Control register flags.
*/
#define CACR_EC 0x80000000 /* Enable cache */
#define CACR_ESB 0x20000000 /* Enable store buffer */
#define CACR_DPI 0x10000000 /* Disable invalidation by CPUSHL */
#define CACR_HLCK 0x08000000 /* Half cache lock mode */
#define CACR_CINVA 0x01000000 /* Invalidate cache */
#define CACR_DNFB 0x00000400 /* Inhibited fill buffer */
#define CACR_DCM_WT 0x00000000 /* Cacheable write-through */
#define CACR_DCM_CB 0x00000100 /* Cacheable copy-back */
#define CACR_DCM_PRE 0x00000200 /* Cache inhibited, precise */
#define CACR_DCM_IMPRE 0x00000300 /* Cache inhibited, imprecise */
#define CACR_WPROTECT 0x00000020 /* Write protect*/
#define CACR_EUSP 0x00000010 /* Eanble separate user a7 */
/*
* Define the Access Control register flags.
*/
#define ACR_BASE_POS 24 /* Address Base (upper 8 bits) */
#define ACR_MASK_POS 16 /* Address Mask (next 8 bits) */
#define ACR_ENABLE 0x00008000 /* Enable this ACR */
#define ACR_USER 0x00000000 /* Allow only user accesses */
#define ACR_SUPER 0x00002000 /* Allow supervisor access only */
#define ACR_ANY 0x00004000 /* Allow any access type */
#define ACR_CM_WT 0x00000000 /* Cacheable, write-through */
#define ACR_CM_CB 0x00000020 /* Cacheable, copy-back */
#define ACR_CM_PRE 0x00000040 /* Cache inhibited, precise */
#define ACR_CM_IMPRE 0x00000060 /* Cache inhibited, imprecise */
#define ACR_WPROTECT 0x00000004 /* Write protect region */
/*
* Define the cache type and arrangement (needed for pushes).
*/
#if defined(CONFIG_M5307)
#define CACHE_SIZE 0x2000 /* 8k of unified cache */
#define ICACHE_SIZE CACHE_SIZE
#define DCACHE_SIZE CACHE_SIZE
#elif defined(CONFIG_M53xx)
#define CACHE_SIZE 0x4000 /* 16k of unified cache */
#define ICACHE_SIZE CACHE_SIZE
#define DCACHE_SIZE CACHE_SIZE
#endif
#define CACHE_LINE_SIZE 16 /* 16 byte line size */
#define CACHE_WAYS 4 /* 4 ways - set associative */
/*
* Set the cache controller settings we will use. This default in the
* CACR is cache inhibited, we use the ACR register to set cacheing
* enabled on the regions we want (eg RAM).
*/
#if defined(CONFIG_CACHE_COPYBACK)
#define CACHE_TYPE ACR_CM_CB
#define CACHE_PUSH
#else
#define CACHE_TYPE ACR_CM_WT
#endif
#ifdef CONFIG_COLDFIRE_SW_A7
#define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE)
#else
#define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE + CACR_EUSP)
#endif
/*
* Unified cache means we will never need to flush for coherency of
* instruction fetch. We will need to flush to maintain memory/DMA
* coherency though in all cases. And for copyback caches we will need
* to push cached data as well.
*/
#define CACHE_INIT (CACHE_MODE + CACR_CINVA - CACR_EC)
#define CACHE_INVALIDATE (CACHE_MODE + CACR_CINVA)
#define CACHE_INVALIDATED (CACHE_MODE + CACR_CINVA)
#define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \
(0x000f0000) + \
(ACR_ENABLE + ACR_ANY + CACHE_TYPE))
#define ACR1_MODE 0
/****************************************************************************/
#endif /* m53xxsim_h */