Merge branch 'for-rmk' of git://gitorious.org/linux-gemini/mainline into devel

Conflicts:
	arch/arm/mm/Kconfig

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

6 files changed, 666 insertions, 2 deletions

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index a6230f7a24c..20979564e7e 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -186,6 +186,24 @@ config CPU_ARM926T
           Say Y if you want support for the ARM926T processor.
           Otherwise, say N.
 
+# FA526
+config CPU_FA526
+        bool
+        select CPU_32v4
+        select CPU_ABRT_EV4
+        select CPU_PABRT_NOIFAR
+        select CPU_CACHE_VIVT
+        select CPU_CP15_MMU
+        select CPU_CACHE_FA
+        select CPU_COPY_FA if MMU
+        select CPU_TLB_FA if MMU
+        help
+          The FA526 is a version of the ARMv4 compatible processor with
+          Branch Target Buffer, Unified TLB and cache line size 16.
+
+          Say Y if you want support for the FA526 processor.
+          Otherwise, say N.
+
 # ARM940T
 config CPU_ARM940T
         bool "Support ARM940T processor" if ARCH_INTEGRATOR
@@ -495,6 +513,9 @@ config CPU_CACHE_VIVT
 config CPU_CACHE_VIPT
         bool
 
+config CPU_CACHE_FA
+        bool
+
 if MMU
 # The copy-page model
 config CPU_COPY_V3
@@ -509,6 +530,9 @@ config CPU_COPY_V4WB
 config CPU_COPY_FEROCEON
         bool
 
+config CPU_COPY_FA
+        bool
+
 config CPU_COPY_V6
         bool
 
@@ -539,6 +563,13 @@ config CPU_TLB_FEROCEON
         help
           Feroceon TLB (v4wbi with non-outer-cachable page table walks).
 
+config CPU_TLB_FA
+        bool
+        help
+          Faraday ARM FA526 architecture, unified TLB with writeback cache
+          and invalidate instruction cache entry. Branch target buffer is
+          also supported.
+
 config CPU_TLB_V6
         bool
 
@@ -649,7 +680,7 @@ config CPU_DCACHE_SIZE
 
 config CPU_DCACHE_WRITETHROUGH
         bool "Force write through D-cache"
-        depends on (CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020) && !CPU_DCACHE_DISABLE
+        depends on (CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_FA526) && !CPU_DCACHE_DISABLE
         default y if CPU_ARM925T
         help
           Say Y here to use the data cache in writethrough mode. Unless you
@@ -664,7 +695,7 @@ config CPU_CACHE_ROUND_ROBIN
 
 config CPU_BPREDICT_DISABLE
         bool "Disable branch prediction"
-        depends on CPU_ARM1020 || CPU_V6 || CPU_MOHAWK || CPU_XSC3 || CPU_V7
+        depends on CPU_ARM1020 || CPU_V6 || CPU_MOHAWK || CPU_XSC3 || CPU_V7 || CPU_FA526
         help
           Say Y here to disable branch prediction.  If unsure, say N.
 
diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index c264683538b..63e3f6dd0e2 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_CPU_CACHE_V4WT)	+= cache-v4wt.o
 obj-$(CONFIG_CPU_CACHE_V4WB)    += cache-v4wb.o
 obj-$(CONFIG_CPU_CACHE_V6)      += cache-v6.o
 obj-$(CONFIG_CPU_CACHE_V7)      += cache-v7.o
+obj-$(CONFIG_CPU_CACHE_FA)      += cache-fa.o
 
 obj-$(CONFIG_CPU_COPY_V3)       += copypage-v3.o
 obj-$(CONFIG_CPU_COPY_V4WT)     += copypage-v4wt.o
@@ -42,6 +43,7 @@ obj-$(CONFIG_CPU_COPY_V6)	+= copypage-v6.o context.o
 obj-$(CONFIG_CPU_SA1100)        += copypage-v4mc.o
 obj-$(CONFIG_CPU_XSCALE)        += copypage-xscale.o
 obj-$(CONFIG_CPU_XSC3)          += copypage-xsc3.o
+obj-$(CONFIG_CPU_COPY_FA)       += copypage-fa.o
 
 obj-$(CONFIG_CPU_TLB_V3)        += tlb-v3.o
 obj-$(CONFIG_CPU_TLB_V4WT)      += tlb-v4.o
@@ -50,6 +52,7 @@ obj-$(CONFIG_CPU_TLB_V4WBI)	+= tlb-v4wbi.o
 obj-$(CONFIG_CPU_TLB_FEROCEON)  += tlb-v4wbi.o  # reuse v4wbi TLB functions
 obj-$(CONFIG_CPU_TLB_V6)        += tlb-v6.o
 obj-$(CONFIG_CPU_TLB_V7)        += tlb-v7.o
+obj-$(CONFIG_CPU_TLB_FA)        += tlb-fa.o
 
 obj-$(CONFIG_CPU_ARM610)        += proc-arm6_7.o
 obj-$(CONFIG_CPU_ARM710)        += proc-arm6_7.o
@@ -63,6 +66,7 @@ obj-$(CONFIG_CPU_ARM925T)	+= proc-arm925.o
 obj-$(CONFIG_CPU_ARM926T)       += proc-arm926.o
 obj-$(CONFIG_CPU_ARM940T)       += proc-arm940.o
 obj-$(CONFIG_CPU_ARM946E)       += proc-arm946.o
+obj-$(CONFIG_CPU_FA526)         += proc-fa526.o
 obj-$(CONFIG_CPU_ARM1020)       += proc-arm1020.o
 obj-$(CONFIG_CPU_ARM1020E)      += proc-arm1020e.o
 obj-$(CONFIG_CPU_ARM1022)       += proc-arm1022.o
diff --git a/arch/arm/mm/cache-fa.S b/arch/arm/mm/cache-fa.S
new file mode 100644
index 00000000000..b63a8f7b95c
--- /dev/null
+++ b/arch/arm/mm/cache-fa.S
@@ -0,0 +1,220 @@
+/*
+ *  linux/arch/arm/mm/cache-fa.S
+ *
+ *  Copyright (C) 2005 Faraday Corp.
+ *  Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * Based on cache-v4wb.S:
+ *  Copyright (C) 1997-2002 Russell king
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Processors: FA520 FA526 FA626       
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/memory.h>
+#include <asm/page.h>
+
+#include "proc-macros.S"
+
+/*
+ * The size of one data cache line.
+ */
+#define CACHE_DLINESIZE 16
+
+/*
+ * The total size of the data cache.
+ */
+#ifdef CONFIG_ARCH_GEMINI
+#define CACHE_DSIZE     8192
+#else
+#define CACHE_DSIZE     16384 
+#endif 
+
+/* FIXME: put optimal value here. Current one is just estimation */
+#define CACHE_DLIMIT    (CACHE_DSIZE * 2)
+
+/*
+ *      flush_user_cache_all()
+ *
+ *      Clean and invalidate all cache entries in a particular address
+ *      space.
+ */
+ENTRY(fa_flush_user_cache_all)
+        /* FALLTHROUGH */
+/*
+ *      flush_kern_cache_all()
+ *
+ *      Clean and invalidate the entire cache.
+ */
+ENTRY(fa_flush_kern_cache_all)
+        mov     ip, #0
+        mov     r2, #VM_EXEC
+__flush_whole_cache:
+        mcr     p15, 0, ip, c7, c14, 0          @ clean/invalidate D cache
+        tst     r2, #VM_EXEC
+        mcrne   p15, 0, ip, c7, c5, 0           @ invalidate I cache
+        mcrne   p15, 0, ip, c7, c5, 6           @ invalidate BTB
+        mcrne   p15, 0, ip, c7, c10, 4          @ drain write buffer
+        mcrne   p15, 0, ip, c7, c5, 4           @ prefetch flush
+        mov     pc, lr
+
+/*
+ *      flush_user_cache_range(start, end, flags)
+ *
+ *      Invalidate a range of cache entries in the specified
+ *      address space.
+ *
+ *      - start - start address (inclusive, page aligned)
+ *      - end   - end address (exclusive, page aligned)
+ *      - flags - vma_area_struct flags describing address space
+ */
+ENTRY(fa_flush_user_cache_range)
+        mov     ip, #0
+        sub     r3, r1, r0                      @ calculate total size
+        cmp     r3, #CACHE_DLIMIT               @ total size >= limit?
+        bhs     __flush_whole_cache             @ flush whole D cache
+
+1:      tst     r2, #VM_EXEC
+        mcrne   p15, 0, r0, c7, c5, 1           @ invalidate I line
+        mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D entry
+        add     r0, r0, #CACHE_DLINESIZE
+        cmp     r0, r1
+        blo     1b
+        tst     r2, #VM_EXEC
+        mcrne   p15, 0, ip, c7, c5, 6           @ invalidate BTB
+        mcrne   p15, 0, ip, c7, c10, 4          @ data write barrier
+        mcrne   p15, 0, ip, c7, c5, 4           @ prefetch flush
+        mov     pc, lr
+
+/*
+ *      coherent_kern_range(start, end)
+ *
+ *      Ensure coherency between the Icache and the Dcache in the
+ *      region described by start.  If you have non-snooping
+ *      Harvard caches, you need to implement this function.
+ *
+ *      - start  - virtual start address
+ *      - end    - virtual end address
+ */
+ENTRY(fa_coherent_kern_range)
+        /* fall through */
+
+/*
+ *      coherent_user_range(start, end)
+ *
+ *      Ensure coherency between the Icache and the Dcache in the
+ *      region described by start.  If you have non-snooping
+ *      Harvard caches, you need to implement this function.
+ *
+ *      - start  - virtual start address
+ *      - end    - virtual end address
+ */
+ENTRY(fa_coherent_user_range)
+        bic     r0, r0, #CACHE_DLINESIZE - 1
+1:      mcr     p15, 0, r0, c7, c14, 1          @ clean and invalidate D entry
+        mcr     p15, 0, r0, c7, c5, 1           @ invalidate I entry
+        add     r0, r0, #CACHE_DLINESIZE
+        cmp     r0, r1
+        blo     1b
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c5, 6           @ invalidate BTB
+        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer
+        mcr     p15, 0, r0, c7, c5, 4           @ prefetch flush
+        mov     pc, lr
+
+/*
+ *      flush_kern_dcache_page(kaddr)
+ *
+ *      Ensure that the data held in the page kaddr is written back
+ *      to the page in question.
+ *
+ *      - kaddr   - kernel address (guaranteed to be page aligned)
+ */
+ENTRY(fa_flush_kern_dcache_page)
+        add     r1, r0, #PAGE_SZ
+1:      mcr     p15, 0, r0, c7, c14, 1          @ clean & invalidate D line
+        add     r0, r0, #CACHE_DLINESIZE
+        cmp     r0, r1
+        blo     1b
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c5, 0           @ invalidate I cache
+        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer
+        mov     pc, lr
+
+/*
+ *      dma_inv_range(start, end)
+ *
+ *      Invalidate (discard) the specified virtual address range.
+ *      May not write back any entries.  If 'start' or 'end'
+ *      are not cache line aligned, those lines must be written
+ *      back.
+ *
+ *      - start  - virtual start address
+ *      - end    - virtual end address
+ */
+ENTRY(fa_dma_inv_range)
+        tst     r0, #CACHE_DLINESIZE - 1
+        bic     r0, r0, #CACHE_DLINESIZE - 1
+        mcrne   p15, 0, r0, c7, c14, 1          @ clean & invalidate D entry
+        tst     r1, #CACHE_DLINESIZE - 1
+        bic     r1, r1, #CACHE_DLINESIZE - 1
+        mcrne   p15, 0, r1, c7, c14, 1          @ clean & invalidate D entry
+1:      mcr     p15, 0, r0, c7, c6, 1           @ invalidate D entry
+        add     r0, r0, #CACHE_DLINESIZE
+        cmp     r0, r1
+        blo     1b
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer
+        mov     pc, lr
+
+/*
+ *      dma_clean_range(start, end)
+ *
+ *      Clean (write back) the specified virtual address range.
+ *
+ *      - start  - virtual start address
+ *      - end    - virtual end address
+ */
+ENTRY(fa_dma_clean_range)
+        bic     r0, r0, #CACHE_DLINESIZE - 1
+1:      mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
+        add     r0, r0, #CACHE_DLINESIZE
+        cmp     r0, r1
+        blo     1b
+        mov     r0, #0  
+        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer
+        mov     pc, lr
+
+/*
+ *      dma_flush_range(start,end)
+ *      - start   - virtual start address of region
+ *      - end     - virtual end address of region
+ */
+ENTRY(fa_dma_flush_range)
+        bic     r0, r0, #CACHE_DLINESIZE - 1
+1:      mcr     p15, 0, r0, c7, c14, 1          @ clean & invalidate D entry
+        add     r0, r0, #CACHE_DLINESIZE
+        cmp     r0, r1
+        blo     1b
+        mov     r0, #0  
+        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer
+        mov     pc, lr
+
+        __INITDATA
+
+        .type   fa_cache_fns, #object
+ENTRY(fa_cache_fns)
+        .long   fa_flush_kern_cache_all
+        .long   fa_flush_user_cache_all
+        .long   fa_flush_user_cache_range
+        .long   fa_coherent_kern_range
+        .long   fa_coherent_user_range
+        .long   fa_flush_kern_dcache_page
+        .long   fa_dma_inv_range
+        .long   fa_dma_clean_range
+        .long   fa_dma_flush_range
+        .size   fa_cache_fns, . - fa_cache_fns
diff --git a/arch/arm/mm/copypage-fa.c b/arch/arm/mm/copypage-fa.c
new file mode 100644
index 00000000000..b2a6008b011
--- /dev/null
+++ b/arch/arm/mm/copypage-fa.c
@@ -0,0 +1,86 @@
+/*
+ *  linux/arch/arm/lib/copypage-fa.S
+ *
+ *  Copyright (C) 2005 Faraday Corp.
+ *  Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * Based on copypage-v4wb.S:
+ *  Copyright (C) 1995-1999 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/highmem.h>
+
+/*
+ * Faraday optimised copy_user_page
+ */
+static void __naked
+fa_copy_user_page(void *kto, const void *kfrom)
+{
+        asm("\
+        stmfd   sp!, {r4, lr}                   @ 2\n\
+        mov     r2, %0                          @ 1\n\
+1:      ldmia   r1!, {r3, r4, ip, lr}           @ 4\n\
+        stmia   r0, {r3, r4, ip, lr}            @ 4\n\
+        mcr     p15, 0, r0, c7, c14, 1          @ 1   clean and invalidate D line\n\
+        add     r0, r0, #16                     @ 1\n\
+        ldmia   r1!, {r3, r4, ip, lr}           @ 4\n\
+        stmia   r0, {r3, r4, ip, lr}            @ 4\n\
+        mcr     p15, 0, r0, c7, c14, 1          @ 1   clean and invalidate D line\n\
+        add     r0, r0, #16                     @ 1\n\
+        subs    r2, r2, #1                      @ 1\n\
+        bne     1b                              @ 1\n\
+        mcr     p15, 0, r2, c7, c10, 4          @ 1   drain WB\n\
+        ldmfd   sp!, {r4, pc}                   @ 3"
+        :
+        : "I" (PAGE_SIZE / 32));
+}
+
+void fa_copy_user_highpage(struct page *to, struct page *from,
+        unsigned long vaddr)
+{
+        void *kto, *kfrom;
+
+        kto = kmap_atomic(to, KM_USER0);
+        kfrom = kmap_atomic(from, KM_USER1);
+        fa_copy_user_page(kto, kfrom);
+        kunmap_atomic(kfrom, KM_USER1);
+        kunmap_atomic(kto, KM_USER0);
+}
+
+/*
+ * Faraday optimised clear_user_page
+ *
+ * Same story as above.
+ */
+void fa_clear_user_highpage(struct page *page, unsigned long vaddr)
+{
+        void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+        asm volatile("\
+        mov     r1, %2                          @ 1\n\
+        mov     r2, #0                          @ 1\n\
+        mov     r3, #0                          @ 1\n\
+        mov     ip, #0                          @ 1\n\
+        mov     lr, #0                          @ 1\n\
+1:      stmia   %0, {r2, r3, ip, lr}            @ 4\n\
+        mcr     p15, 0, %0, c7, c14, 1          @ 1   clean and invalidate D line\n\
+        add     %0, %0, #16                     @ 1\n\
+        stmia   %0, {r2, r3, ip, lr}            @ 4\n\
+        mcr     p15, 0, %0, c7, c14, 1          @ 1   clean and invalidate D line\n\
+        add     %0, %0, #16                     @ 1\n\
+        subs    r1, r1, #1                      @ 1\n\
+        bne     1b                              @ 1\n\
+        mcr     p15, 0, r1, c7, c10, 4          @ 1   drain WB"
+        : "=r" (ptr)
+        : "0" (kaddr), "I" (PAGE_SIZE / 32)
+        : "r1", "r2", "r3", "ip", "lr");
+        kunmap_atomic(kaddr, KM_USER0);
+}
+
+struct cpu_user_fns fa_user_fns __initdata = {
+        .cpu_clear_user_highpage = fa_clear_user_highpage,
+        .cpu_copy_user_highpage = fa_copy_user_highpage,
+};
diff --git a/arch/arm/mm/proc-fa526.S b/arch/arm/mm/proc-fa526.S
new file mode 100644
index 00000000000..08b8a955d5d
--- /dev/null
+++ b/arch/arm/mm/proc-fa526.S
@@ -0,0 +1,248 @@
+/*
+ *  linux/arch/arm/mm/proc-fa526.S: MMU functions for FA526
+ *
+ *  Written by : Luke Lee
+ *  Copyright (C) 2005 Faraday Corp.
+ *  Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ *
+ * These are the low level assembler for performing cache and TLB
+ * functions on the fa526.
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/assembler.h>
+#include <asm/hwcap.h>
+#include <asm/pgtable-hwdef.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+
+#include "proc-macros.S"
+
+#define CACHE_DLINESIZE 16
+
+        .text
+/*
+ * cpu_fa526_proc_init()
+ */
+ENTRY(cpu_fa526_proc_init)
+        mov     pc, lr
+
+/*
+ * cpu_fa526_proc_fin()
+ */
+ENTRY(cpu_fa526_proc_fin)
+        stmfd   sp!, {lr}
+        mov     ip, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
+        msr     cpsr_c, ip
+        bl      fa_flush_kern_cache_all
+        mrc     p15, 0, r0, c1, c0, 0           @ ctrl register
+        bic     r0, r0, #0x1000                 @ ...i............
+        bic     r0, r0, #0x000e                 @ ............wca.
+        mcr     p15, 0, r0, c1, c0, 0           @ disable caches
+        nop
+        nop
+        ldmfd   sp!, {pc}
+
+/*
+ * cpu_fa526_reset(loc)
+ *
+ * Perform a soft reset of the system.  Put the CPU into the
+ * same state as it would be if it had been reset, and branch
+ * to what would be the reset vector.
+ *
+ * loc: location to jump to for soft reset
+ */
+        .align  4
+ENTRY(cpu_fa526_reset)
+/* TODO: Use CP8 if possible... */
+        mov     ip, #0
+        mcr     p15, 0, ip, c7, c7, 0           @ invalidate I,D caches
+        mcr     p15, 0, ip, c7, c10, 4          @ drain WB
+#ifdef CONFIG_MMU
+        mcr     p15, 0, ip, c8, c7, 0           @ invalidate I & D TLBs
+#endif
+        mrc     p15, 0, ip, c1, c0, 0           @ ctrl register
+        bic     ip, ip, #0x000f                 @ ............wcam
+        bic     ip, ip, #0x1100                 @ ...i...s........
+        bic     ip, ip, #0x0800                 @ BTB off
+        mcr     p15, 0, ip, c1, c0, 0           @ ctrl register
+        nop
+        nop
+        mov     pc, r0
+
+/*
+ * cpu_fa526_do_idle()
+ */
+        .align  4
+ENTRY(cpu_fa526_do_idle)
+        mcr     p15, 0, r0, c7, c0, 4           @ Wait for interrupt
+        mov     pc, lr
+
+
+ENTRY(cpu_fa526_dcache_clean_area)
+1:      mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
+        add     r0, r0, #CACHE_DLINESIZE
+        subs    r1, r1, #CACHE_DLINESIZE
+        bhi     1b
+        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+        mov     pc, lr
+
+/* =============================== PageTable ============================== */
+
+/*
+ * cpu_fa526_switch_mm(pgd)
+ *
+ * Set the translation base pointer to be as described by pgd.
+ *
+ * pgd: new page tables
+ */
+        .align  4
+ENTRY(cpu_fa526_switch_mm)
+#ifdef CONFIG_MMU
+        mov     ip, #0
+#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
+        mcr     p15, 0, ip, c7, c6, 0           @ invalidate D cache
+#else
+        mcr     p15, 0, ip, c7, c14, 0          @ clean and invalidate whole D cache
+#endif
+        mcr     p15, 0, ip, c7, c5, 0           @ invalidate I cache
+        mcr     p15, 0, ip, c7, c5, 6           @ invalidate BTB since mm changed
+        mcr     p15, 0, ip, c7, c10, 4          @ data write barrier
+        mcr     p15, 0, ip, c7, c5, 4           @ prefetch flush
+        mcr     p15, 0, r0, c2, c0, 0           @ load page table pointer
+        mcr     p15, 0, ip, c8, c7, 0           @ invalidate UTLB
+#endif
+        mov     pc, lr
+
+/*
+ * cpu_fa526_set_pte_ext(ptep, pte, ext)
+ *
+ * Set a PTE and flush it out
+ */
+        .align  4
+ENTRY(cpu_fa526_set_pte_ext)
+#ifdef CONFIG_MMU
+        armv3_set_pte_ext
+        mov     r0, r0
+        mcr     p15, 0, r0, c7, c10, 1          @ clean D entry
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c10, 4          @ drain WB
+#endif
+        mov     pc, lr
+
+        __INIT
+
+        .type   __fa526_setup, #function
+__fa526_setup:
+        /* On return of this routine, r0 must carry correct flags for CFG register */
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c7              @ invalidate I,D caches on v4
+        mcr     p15, 0, r0, c7, c10, 4          @ drain write buffer on v4
+#ifdef CONFIG_MMU
+        mcr     p15, 0, r0, c8, c7              @ invalidate I,D TLBs on v4
+#endif
+        mcr     p15, 0, r0, c7, c5, 5           @ invalidate IScratchpad RAM
+
+        mov     r0, #1
+        mcr     p15, 0, r0, c1, c1, 0           @ turn-on ECR
+
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c5, 6           @ invalidate BTB All
+        mcr     p15, 0, r0, c7, c10, 4          @ data write barrier
+        mcr     p15, 0, r0, c7, c5, 4           @ prefetch flush
+
+        mov     r0, #0x1f                       @ Domains 0, 1 = manager, 2 = client
+        mcr     p15, 0, r0, c3, c0              @ load domain access register
+
+        mrc     p15, 0, r0, c1, c0              @ get control register v4
+        ldr     r5, fa526_cr1_clear
+        bic     r0, r0, r5
+        ldr     r5, fa526_cr1_set
+        orr     r0, r0, r5
+        mov     pc, lr
+        .size   __fa526_setup, . - __fa526_setup
+
+        /*
+         * .RVI ZFRS BLDP WCAM
+         * ..11 1001 .111 1101
+         *
+         */
+        .type   fa526_cr1_clear, #object
+        .type   fa526_cr1_set, #object
+fa526_cr1_clear:
+        .word   0x3f3f
+fa526_cr1_set:
+        .word   0x397D
+
+        __INITDATA
+
+/*
+ * Purpose : Function pointers used to access above functions - all calls
+ *           come through these
+ */
+        .type   fa526_processor_functions, #object
+fa526_processor_functions:
+        .word   v4_early_abort
+        .word   pabort_noifar
+        .word   cpu_fa526_proc_init
+        .word   cpu_fa526_proc_fin
+        .word   cpu_fa526_reset
+        .word   cpu_fa526_do_idle
+        .word   cpu_fa526_dcache_clean_area
+        .word   cpu_fa526_switch_mm
+        .word   cpu_fa526_set_pte_ext
+        .size   fa526_processor_functions, . - fa526_processor_functions
+
+        .section ".rodata"
+
+        .type   cpu_arch_name, #object
+cpu_arch_name:
+        .asciz  "armv4"
+        .size   cpu_arch_name, . - cpu_arch_name
+
+        .type   cpu_elf_name, #object
+cpu_elf_name:
+        .asciz  "v4"
+        .size   cpu_elf_name, . - cpu_elf_name
+
+        .type   cpu_fa526_name, #object
+cpu_fa526_name:
+        .asciz  "FA526"
+        .size   cpu_fa526_name, . - cpu_fa526_name
+
+        .align
+
+        .section ".proc.info.init", #alloc, #execinstr
+
+        .type   __fa526_proc_info,#object
+__fa526_proc_info:
+        .long   0x66015261
+        .long   0xff01fff1
+        .long   PMD_TYPE_SECT | \
+                PMD_SECT_BUFFERABLE | \
+                PMD_SECT_CACHEABLE | \
+                PMD_BIT4 | \
+                PMD_SECT_AP_WRITE | \
+                PMD_SECT_AP_READ
+        .long   PMD_TYPE_SECT | \
+                PMD_BIT4 | \
+                PMD_SECT_AP_WRITE | \
+                PMD_SECT_AP_READ
+        b       __fa526_setup
+        .long   cpu_arch_name
+        .long   cpu_elf_name
+        .long   HWCAP_SWP | HWCAP_HALF
+        .long   cpu_fa526_name
+        .long   fa526_processor_functions
+        .long   fa_tlb_fns
+        .long   fa_user_fns
+        .long   fa_cache_fns
+        .size   __fa526_proc_info, . - __fa526_proc_info
diff --git a/arch/arm/mm/tlb-fa.S b/arch/arm/mm/tlb-fa.S
new file mode 100644
index 00000000000..9694f1f6f48
--- /dev/null
+++ b/arch/arm/mm/tlb-fa.S
@@ -0,0 +1,75 @@
+/*
+ *  linux/arch/arm/mm/tlb-fa.S
+ *
+ *  Copyright (C) 2005 Faraday Corp.
+ *  Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * Based on tlb-v4wbi.S:
+ *  Copyright (C) 1997-2002 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  ARM architecture version 4, Faraday variation.
+ *  This assume an unified TLBs, with a write buffer, and branch target buffer (BTB)
+ *
+ *  Processors: FA520 FA526 FA626
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/asm-offsets.h>
+#include <asm/tlbflush.h>
+#include "proc-macros.S"
+
+
+/*
+ *      flush_user_tlb_range(start, end, mm)
+ *
+ *      Invalidate a range of TLB entries in the specified address space.
+ *
+ *      - start - range start address
+ *      - end   - range end address
+ *      - mm    - mm_struct describing address space
+ */
+        .align  4
+ENTRY(fa_flush_user_tlb_range)
+        vma_vm_mm ip, r2
+        act_mm  r3                              @ get current->active_mm
+        eors    r3, ip, r3                      @ == mm ?
+        movne   pc, lr                          @ no, we dont do anything
+        mov     r3, #0
+        mcr     p15, 0, r3, c7, c10, 4          @ drain WB
+        bic     r0, r0, #0x0ff
+        bic     r0, r0, #0xf00
+1:      mcr     p15, 0, r0, c8, c7, 1           @ invalidate UTLB entry
+        add     r0, r0, #PAGE_SZ
+        cmp     r0, r1
+        blo     1b
+        mcr     p15, 0, r3, c7, c5, 6           @ invalidate BTB
+        mcr     p15, 0, r3, c7, c10, 4          @ data write barrier
+        mov     pc, lr
+
+
+ENTRY(fa_flush_kern_tlb_range)
+        mov     r3, #0
+        mcr     p15, 0, r3, c7, c10, 4          @ drain WB
+        bic     r0, r0, #0x0ff
+        bic     r0, r0, #0xf00
+1:      mcr     p15, 0, r0, c8, c7, 1           @ invalidate UTLB entry
+        add     r0, r0, #PAGE_SZ
+        cmp     r0, r1
+        blo     1b
+        mcr     p15, 0, r3, c7, c5, 6           @ invalidate BTB
+        mcr     p15, 0, r3, c7, c10, 4          @ data write barrier
+        mcr     p15, 0, r3, c7, c5, 4           @ prefetch flush
+        mov     pc, lr
+
+        __INITDATA
+
+        .type   fa_tlb_fns, #object
+ENTRY(fa_tlb_fns)
+        .long   fa_flush_user_tlb_range
+        .long   fa_flush_kern_tlb_range
+        .long   fa_tlb_flags
+        .size   fa_tlb_fns, . - fa_tlb_fns