ENGR00118579 Enable MMUrel_imx_2.6.31_09.12.00_RC1

To enable MMU, it is porting from redboot.
Enable MMU and enable I/D cache.

Signed-off-by:Fred Fan <r01011@freescale.com>

1 files changed, 135 insertions, 0 deletions

diff --git a/include/asm-arm/arch-mx35/mmu.h b/include/asm-arm/arch-mx35/mmu.h
new file mode 100644
index 0000000..a701c72
--- /dev/null
+++ b/include/asm-arm/arch-mx35/mmu.h
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __ARM_ARCH_MMU_H
+#define __ARM_ARCH_MMU_H
+
+/*
+ * Translation Table Base Bit Masks
+ */
+#define ARM_TRANSLATION_TABLE_MASK               0xFFFFC000
+
+/*
+ * Domain Access Control Bit Masks
+ */
+#define ARM_ACCESS_TYPE_NO_ACCESS(domain_num)    (0x0 << (domain_num)*2)
+#define ARM_ACCESS_TYPE_CLIENT(domain_num)       (0x1 << (domain_num)*2)
+#define ARM_ACCESS_TYPE_MANAGER(domain_num)      (0x3 << (domain_num)*2)
+
+struct ARM_MMU_FIRST_LEVEL_FAULT {
+	unsigned int id:2;
+	unsigned int sbz:30;
+};
+
+#define ARM_MMU_FIRST_LEVEL_FAULT_ID 0x0
+
+struct ARM_MMU_FIRST_LEVEL_PAGE_TABLE {
+	unsigned int id:2;
+	unsigned int imp:2;
+	unsigned int domain:4;
+	unsigned int sbz:1;
+	unsigned int base_address:23;
+};
+
+#define ARM_MMU_FIRST_LEVEL_PAGE_TABLE_ID 0x1
+
+struct ARM_MMU_FIRST_LEVEL_SECTION {
+	unsigned int id:2;
+	unsigned int b:1;
+	unsigned int c:1;
+	unsigned int imp:1;
+	unsigned int domain:4;
+	unsigned int sbz0:1;
+	unsigned int ap:2;
+	unsigned int sbz1:8;
+	unsigned int base_address:12;
+};
+
+#define ARM_MMU_FIRST_LEVEL_SECTION_ID 0x2
+
+struct ARM_MMU_FIRST_LEVEL_RESERVED {
+	unsigned int id:2;
+	unsigned int sbz:30;
+};
+
+#define ARM_MMU_FIRST_LEVEL_RESERVED_ID 0x3
+
+#define ARM_MMU_FIRST_LEVEL_DESCRIPTOR_ADDRESS(ttb_base, table_index) \
+	(unsigned long *)((unsigned long)(ttb_base) + ((table_index) << 2))
+
+#define ARM_FIRST_LEVEL_PAGE_TABLE_SIZE 0x4000
+
+#define ARM_MMU_SECTION(ttb_base, actual_base, virtual_base,		\
+			cacheable, bufferable, perm)			\
+	{								\
+	register union ARM_MMU_FIRST_LEVEL_DESCRIPTOR desc;		\
+	desc.word = 0;							\
+	desc.section.id = ARM_MMU_FIRST_LEVEL_SECTION_ID;		\
+	desc.section.domain = 0;					\
+	desc.section.c = (cacheable);					\
+	desc.section.b = (bufferable);					\
+	desc.section.ap = (perm);					\
+	desc.section.base_address = (actual_base);			\
+	*ARM_MMU_FIRST_LEVEL_DESCRIPTOR_ADDRESS(ttb_base, (virtual_base)) \
+				= desc.word;				\
+	}
+
+#define X_ARM_MMU_SECTION(abase, vbase, size, cache, buff, access)	\
+	{								\
+		int i; int j = abase; int k = vbase;			\
+		for (i = size; i > 0 ; i--, j++, k++)			\
+			ARM_MMU_SECTION(ttb_base, j, k, cache, buff, access); \
+	}
+
+union ARM_MMU_FIRST_LEVEL_DESCRIPTOR {
+	unsigned long word;
+	struct ARM_MMU_FIRST_LEVEL_FAULT fault;
+	struct ARM_MMU_FIRST_LEVEL_PAGE_TABLE page_table;
+	struct ARM_MMU_FIRST_LEVEL_SECTION section;
+	struct ARM_MMU_FIRST_LEVEL_RESERVED reserved;
+};
+
+#define ARM_UNCACHEABLE		0
+#define ARM_CACHEABLE		1
+#define ARM_UNBUFFERABLE	0
+#define ARM_BUFFERABLE		1
+
+#define ARM_ACCESS_PERM_NONE_NONE	0
+#define ARM_ACCESS_PERM_RO_NONE		0
+#define ARM_ACCESS_PERM_RO_RO		0
+#define ARM_ACCESS_PERM_RW_NONE		1
+#define ARM_ACCESS_PERM_RW_RO		2
+#define ARM_ACCESS_PERM_RW_RW		3
+
+/*
+ * Initialization for the Domain Access Control Register
+ */
+#define ARM_ACCESS_DACR_DEFAULT      (	\
+	ARM_ACCESS_TYPE_MANAGER(0)    |	\
+	ARM_ACCESS_TYPE_NO_ACCESS(1)  |	\
+	ARM_ACCESS_TYPE_NO_ACCESS(2)  |	\
+	ARM_ACCESS_TYPE_NO_ACCESS(3)  | \
+	ARM_ACCESS_TYPE_NO_ACCESS(4)  | \
+	ARM_ACCESS_TYPE_NO_ACCESS(5)  | \
+	ARM_ACCESS_TYPE_NO_ACCESS(6)  | \
+	ARM_ACCESS_TYPE_NO_ACCESS(7)  | \
+	ARM_ACCESS_TYPE_NO_ACCESS(8)  | \
+	ARM_ACCESS_TYPE_NO_ACCESS(9)  | \
+	ARM_ACCESS_TYPE_NO_ACCESS(10) | \
+	ARM_ACCESS_TYPE_NO_ACCESS(11) | \
+	ARM_ACCESS_TYPE_NO_ACCESS(12) | \
+	ARM_ACCESS_TYPE_NO_ACCESS(13) |	\
+	ARM_ACCESS_TYPE_NO_ACCESS(14) |	\
+	ARM_ACCESS_TYPE_NO_ACCESS(15))
+
+#endif