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-rw-r--r--arch/m68k/include/asm/m54xxacr.h137
1 files changed, 137 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/m54xxacr.h b/arch/m68k/include/asm/m54xxacr.h
new file mode 100644
index 000000000..466df7b03
--- /dev/null
+++ b/arch/m68k/include/asm/m54xxacr.h
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Bit definitions for the MCF54xx ACR and CACR registers.
+ */
+
+#ifndef m54xxacr_h
+#define m54xxacr_h
+
+/*
+ * Define the Cache register flags.
+ */
+#define CACR_DEC 0x80000000 /* Enable data cache */
+#define CACR_DWP 0x40000000 /* Data write protection */
+#define CACR_DESB 0x20000000 /* Enable data store buffer */
+#define CACR_DDPI 0x10000000 /* Disable invalidation by CPUSHL */
+#define CACR_DHCLK 0x08000000 /* Half data cache lock mode */
+#define CACR_DDCM_WT 0x00000000 /* Write through cache*/
+#define CACR_DDCM_CP 0x02000000 /* Copyback cache */
+#define CACR_DDCM_P 0x04000000 /* No cache, precise */
+#define CACR_DDCM_IMP 0x06000000 /* No cache, imprecise */
+#define CACR_DCINVA 0x01000000 /* Invalidate data cache */
+#define CACR_BEC 0x00080000 /* Enable branch cache */
+#define CACR_BCINVA 0x00040000 /* Invalidate branch cache */
+#define CACR_IEC 0x00008000 /* Enable instruction cache */
+#define CACR_DNFB 0x00002000 /* Inhibited fill buffer */
+#define CACR_IDPI 0x00001000 /* Disable CPUSHL */
+#define CACR_IHLCK 0x00000800 /* Instruction cache half lock */
+#define CACR_IDCM 0x00000400 /* Instruction cache inhibit */
+#define CACR_ICINVA 0x00000100 /* Invalidate instr cache */
+#define CACR_EUSP 0x00000020 /* Enable separate user a7 */
+
+#define ACR_BASE_POS 24 /* Address Base */
+#define ACR_MASK_POS 16 /* Address Mask */
+#define ACR_ENABLE 0x00008000 /* Enable address */
+#define ACR_USER 0x00000000 /* User mode access only */
+#define ACR_SUPER 0x00002000 /* Supervisor mode only */
+#define ACR_ANY 0x00004000 /* Match any access mode */
+#define ACR_CM_WT 0x00000000 /* Write through mode */
+#define ACR_CM_CP 0x00000020 /* Copyback mode */
+#define ACR_CM_OFF_PRE 0x00000040 /* No cache, precise */
+#define ACR_CM_OFF_IMP 0x00000060 /* No cache, imprecise */
+#define ACR_CM 0x00000060 /* Cache mode mask */
+#define ACR_SP 0x00000008 /* Supervisor protect */
+#define ACR_WPROTECT 0x00000004 /* Write protect */
+
+#define ACR_BA(x) ((x) & 0xff000000)
+#define ACR_ADMSK(x) ((((x) - 1) & 0xff000000) >> 8)
+
+#if defined(CONFIG_M5407)
+
+#define ICACHE_SIZE 0x4000 /* instruction - 16k */
+#define DCACHE_SIZE 0x2000 /* data - 8k */
+
+#elif defined(CONFIG_M54xx)
+
+#define ICACHE_SIZE 0x8000 /* instruction - 32k */
+#define DCACHE_SIZE 0x8000 /* data - 32k */
+
+#elif defined(CONFIG_M5441x)
+
+#define ICACHE_SIZE 0x2000 /* instruction - 8k */
+#define DCACHE_SIZE 0x2000 /* data - 8k */
+#endif
+
+#define CACHE_LINE_SIZE 0x0010 /* 16 bytes */
+#define CACHE_WAYS 4 /* 4 ways */
+
+#define ICACHE_SET_MASK ((ICACHE_SIZE / 64 - 1) << CACHE_WAYS)
+#define DCACHE_SET_MASK ((DCACHE_SIZE / 64 - 1) << CACHE_WAYS)
+#define ICACHE_MAX_ADDR ICACHE_SET_MASK
+#define DCACHE_MAX_ADDR DCACHE_SET_MASK
+
+/*
+ * Version 4 cores have a true harvard style separate instruction
+ * and data cache. Enable data and instruction caches, also enable write
+ * buffers and branch accelerator.
+ */
+/* attention : enabling CACR_DESB requires a "nop" to flush the store buffer */
+/* use '+' instead of '|' for assembler's sake */
+
+ /* Enable data cache */
+ /* Enable data store buffer */
+ /* outside ACRs : No cache, precise */
+ /* Enable instruction+branch caches */
+#if defined(CONFIG_M5407)
+#define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC)
+#else
+#define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC+CACR_EUSP)
+#endif
+#define CACHE_INIT (CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
+
+#if defined(CONFIG_MMU)
+/*
+ * If running with the MMU enabled then we need to map the internal
+ * register region as non-cacheable. And then we map all our RAM as
+ * cacheable and supervisor access only.
+ */
+#define ACR0_MODE (ACR_BA(IOMEMBASE)+ACR_ADMSK(IOMEMSIZE)+ \
+ ACR_ENABLE+ACR_SUPER+ACR_CM_OFF_PRE+ACR_SP)
+#if defined(CONFIG_CACHE_COPYBACK)
+#define ACR1_MODE (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
+ ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_CP)
+#else
+#define ACR1_MODE (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
+ ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_WT)
+#endif
+#define ACR2_MODE 0
+#define ACR3_MODE (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
+ ACR_ENABLE+ACR_SUPER+ACR_SP)
+
+#else
+
+/*
+ * For the non-MMU enabled case we map all of RAM as cacheable.
+ */
+#if defined(CONFIG_CACHE_COPYBACK)
+#define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_CP)
+#else
+#define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT)
+#endif
+#define INSN_CACHE_MODE (ACR_ENABLE+ACR_ANY)
+
+#define CACHE_INVALIDATE (CACHE_MODE+CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
+#define CACHE_INVALIDATEI (CACHE_MODE+CACR_BCINVA+CACR_ICINVA)
+#define CACHE_INVALIDATED (CACHE_MODE+CACR_DCINVA)
+#define ACR0_MODE (0x000f0000+DATA_CACHE_MODE)
+#define ACR1_MODE 0
+#define ACR2_MODE (0x000f0000+INSN_CACHE_MODE)
+#define ACR3_MODE 0
+
+#if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_CP)
+/* Copyback cache mode must push dirty cache lines first */
+#define CACHE_PUSH
+#endif
+
+#endif /* CONFIG_MMU */
+#endif /* m54xxacr_h */