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, 79 insertions, 0 deletions

diff --git a/include/asm-arm/mmu.h b/include/asm-arm/mmu.h
new file mode 100644
index 0000000..668dfc9
--- /dev/null
+++ b/include/asm-arm/mmu.h
@@ -0,0 +1,79 @@
+/*
+ * 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 __ASM_MMU_H
+#define __ASM_MMU_H
+
+
+#define MMU_L1_TYPE         0x03  /* Descriptor type */
+#define MMU_L1_TYPE_Fault   0x00  /* Invalid */
+#define MMU_L1_TYPE_Page    0x11  /* Individual page mapping */
+#define MMU_L1_TYPE_Section 0x12  /* Mapping for 1M segment */
+
+#define MMU_L2_TYPE         0x03  /* Descriptor type */
+#define MMU_L2_TYPE_Fault   0x00  /* Invalid data */
+#define MMU_L2_TYPE_Large   0x01  /* Large page (64K) */
+#define MMU_L2_TYPE_Small   0x02  /* Small page (4K) */
+
+#define MMU_Bufferable      0x04  /* Data can use write-buffer */
+#define MMU_Cacheable       0x08  /* Data can use cache */
+
+#define MMU_AP_Limited     0x000  /* Limited access */
+#define MMU_AP_Supervisor  0x400  /* Supervisor RW, User none */
+#define MMU_AP_UserRead    0x800  /* Supervisor RW, User read only */
+#define MMU_AP_Any         0xC00  /* Supervisor RW, User RW */
+
+#define MMU_AP_ap0_Any     0x030
+#define MMU_AP_ap1_Any     0x0C0
+#define MMU_AP_ap2_Any     0x300
+#define MMU_AP_ap3_Any     0xC00
+#define MMU_AP_All (MMU_AP_ap0_Any|MMU_AP_ap1_Any|MMU_AP_ap2_Any|MMU_AP_ap3_Any)
+
+#define MMU_DOMAIN(x)      ((x)<<5)
+
+#define MMU_PAGE_SIZE      0x1000
+#define MMU_SECTION_SIZE   0x100000
+
+#define MMU_CP               p15      /* Co-processor ID */
+#define MMU_Control          c1       /* Control register */
+#define MMU_Base             c2       /* Page tables base */
+#define MMU_DomainAccess     c3       /* Domain access control */
+#define MMU_FaultStatus      c5       /* Fault status register */
+#define MMU_FaultAddress     c6       /* Fault Address */
+#define MMU_InvalidateCache  c7       /* Invalidate cache data */
+#define MMU_TLB              c8       /* Translation Lookaside Buffer */
+
+/* These seem to be 710 specific */
+#define MMU_FlushTLB         c5
+#define MMU_FlushIDC         c7
+
+#define MMU_Control_M  0x001    /* Enable MMU */
+#define MMU_Control_A  0x002    /* Enable address alignment faults */
+#define MMU_Control_C  0x004    /* Enable cache */
+#define MMU_Control_W  0x008    /* Enable write-buffer */
+#define MMU_Control_P  0x010    /* Compatability: 32 bit code */
+#define MMU_Control_D  0x020    /* Compatability: 32 bit data */
+#define MMU_Control_L  0x040    /* Compatability: */
+#define MMU_Control_B  0x080    /* Enable Big-Endian */
+#define MMU_Control_S  0x100    /* Enable system protection */
+#define MMU_Control_R  0x200    /* Enable ROM protection */
+#define MMU_Control_I  0x1000   /* Enable Instruction cache */
+#define MMU_Control_X  0x2000   /* Set interrupt vectors at 0xFFFF0000 */
+#define MMU_Control_Init (MMU_Control_P|MMU_Control_D|MMU_Control_L)
+
+/* Extras for some newer versions eg. ARM920 with architecture version 4. */
+#define MMU_Control_F  0x400    /* IMPLEMENTATION DEFINED */
+#define MMU_Control_Z  0x800    /* Enable branch predicion */
+#define MMU_Control_RR 0x4000   /* Select non-random cache replacement */
+
+#endif