1 files changed, 72 insertions, 0 deletions
diff --git a/arch/arm/cpu/mmu_32.h b/arch/arm/cpu/mmu_32.h
new file mode 100644
index 0000000000..607d9e8608
--- /dev/null
+++ b/arch/arm/cpu/mmu_32.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __ARM_MMU_H
+#define __ARM_MMU_H
+
+#include <asm/pgtable.h>
+#include <linux/sizes.h>
+#include <asm/system_info.h>
+
+#include "mmu-common.h"
+
+#define PGDIR_SHIFT	20
+#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
+
+#define pgd_index(addr)		((addr) >> PGDIR_SHIFT)
+
+#ifdef CONFIG_MMU
+void __mmu_cache_on(void);
+void __mmu_cache_off(void);
+void __mmu_cache_flush(void);
+#else
+static inline void __mmu_cache_on(void) {}
+static inline void __mmu_cache_off(void) {}
+static inline void __mmu_cache_flush(void) {}
+#endif
+
+static inline unsigned long get_ttbr(void)
+{
+	unsigned long ttb;
+
+	asm volatile ("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb));
+
+	return ttb;
+}
+
+static inline void set_ttbr(void *ttb)
+{
+	asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb) /*:*/);
+}
+
+#define DOMAIN_CLIENT	1
+#define DOMAIN_MANAGER	3
+
+static inline unsigned long get_domain(void)
+{
+	unsigned long dacr;
+
+	asm volatile ("mrc p15, 0, %0, c3, c0, 0" : "=r"(dacr));
+
+	return dacr;
+}
+
+static inline void set_domain(unsigned val)
+{
+	/* Set the Domain Access Control Register */
+	asm volatile ("mcr  p15,0,%0,c3,c0,0" : : "r"(val) /*:*/);
+}
+
+#define PMD_SECT_DEF_UNCACHED (PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT)
+#define PMD_SECT_DEF_CACHED (PMD_SECT_WB | PMD_SECT_DEF_UNCACHED)
+
+static inline unsigned long attrs_uncached_mem(void)
+{
+	unsigned int flags = PMD_SECT_DEF_UNCACHED;
+
+	if (cpu_architecture() >= CPU_ARCH_ARMv7)
+		flags |= PMD_SECT_XN;
+
+	return flags;
+}
+
+#endif /* __ARM_MMU_H */