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authorMika Westerberg <mika.westerberg@iki.fi>2010-10-28 11:27:40 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-10-28 13:54:28 +0100
commitc8c90860cd3592fac83a349f84a20360a6498727 (patch)
tree3a97e1cb8451a9cdfff9f5ab574bf16581a9c7ef /arch
parent4e54d93d3c9846ba1c2644ad06463dafa690d1b7 (diff)
ARM: 6466/1: implement flush_icache_all for the rest of the CPUs
Commit 81d11955bf0 ("ARM: 6405/1: Handle __flush_icache_all for CONFIG_SMP_ON_UP") added a new function to struct cpu_cache_fns: flush_icache_all(). It also implemented this for v6 and v7 but not for v5 and backwards. Without the function pointer in place, we will be calling wrong cache functions. For example with ep93xx we get following: Unable to handle kernel paging request at virtual address ee070f38 pgd = c0004000 [ee070f38] *pgd=00000000 Internal error: Oops: 80000005 [#1] PREEMPT last sysfs file: Modules linked in: CPU: 0 Not tainted (2.6.36+ #1) PC is at 0xee070f38 LR is at __dma_alloc+0x11c/0x2d0 pc : [<ee070f38>] lr : [<c0032c8c>] psr: 60000013 sp : c581bde0 ip : 00000000 fp : c0472000 r10: c0472000 r9 : 000000d0 r8 : 00020000 r7 : 0001ffff r6 : 00000000 r5 : c0472400 r4 : c5980000 r3 : c03ab7e0 r2 : 00000000 r1 : c59a0000 r0 : c5980000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: c000717f Table: c0004000 DAC: 00000017 Process swapper (pid: 1, stack limit = 0xc581a270) [<c0032c8c>] (__dma_alloc+0x11c/0x2d0) [<c0032e5c>] (dma_alloc_writecombine+0x1c/0x24) [<c0204148>] (ep93xx_pcm_preallocate_dma_buffer+0x44/0x60) [<c02041c0>] (ep93xx_pcm_new+0x5c/0x88) [<c01ff188>] (snd_soc_instantiate_cards+0x8a8/0xbc0) [<c01ff59c>] (soc_probe+0xfc/0x134) [<c01adafc>] (platform_drv_probe+0x18/0x1c) [<c01acca4>] (driver_probe_device+0xb0/0x16c) [<c01ac284>] (bus_for_each_drv+0x48/0x84) [<c01ace90>] (device_attach+0x50/0x68) [<c01ac0f8>] (bus_probe_device+0x24/0x44) [<c01aad7c>] (device_add+0x2fc/0x44c) [<c01adfa8>] (platform_device_add+0x104/0x15c) [<c0015eb8>] (simone_init+0x60/0x94) [<c0021410>] (do_one_initcall+0xd0/0x1a4) __dma_alloc() calls (inlined) __dma_alloc_buffer() which ends up calling dmac_flush_range(). Now since the entries in the arm920_cache_fns are shifted by one, we jump into address 0xee070f38 which is actually next instruction after the arm920_cache_fns structure. So implement flush_icache_all() for the rest of the supported CPUs using a generic 'invalidate I cache' instruction. Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mm/cache-fa.S12
-rw-r--r--arch/arm/mm/cache-v3.S10
-rw-r--r--arch/arm/mm/cache-v4.S10
-rw-r--r--arch/arm/mm/cache-v4wb.S12
-rw-r--r--arch/arm/mm/cache-v4wt.S12
-rw-r--r--arch/arm/mm/proc-arm1020.S15
-rw-r--r--arch/arm/mm/proc-arm1020e.S15
-rw-r--r--arch/arm/mm/proc-arm1022.S15
-rw-r--r--arch/arm/mm/proc-arm1026.S15
-rw-r--r--arch/arm/mm/proc-arm920.S12
-rw-r--r--arch/arm/mm/proc-arm922.S12
-rw-r--r--arch/arm/mm/proc-arm925.S12
-rw-r--r--arch/arm/mm/proc-arm926.S12
-rw-r--r--arch/arm/mm/proc-arm940.S12
-rw-r--r--arch/arm/mm/proc-arm946.S12
-rw-r--r--arch/arm/mm/proc-feroceon.S13
-rw-r--r--arch/arm/mm/proc-xsc3.S12
-rw-r--r--arch/arm/mm/proc-xscale.S12
18 files changed, 225 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-fa.S b/arch/arm/mm/cache-fa.S
index 7148e53e6078..1fa6f71470de 100644
--- a/arch/arm/mm/cache-fa.S
+++ b/arch/arm/mm/cache-fa.S
@@ -38,6 +38,17 @@
#define CACHE_DLIMIT (CACHE_DSIZE * 2)
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(fa_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(fa_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Clean and invalidate all cache entries in a particular address
@@ -233,6 +244,7 @@ ENDPROC(fa_dma_unmap_area)
.type fa_cache_fns, #object
ENTRY(fa_cache_fns)
+ .long fa_flush_icache_all
.long fa_flush_kern_cache_all
.long fa_flush_user_cache_all
.long fa_flush_user_cache_range
diff --git a/arch/arm/mm/cache-v3.S b/arch/arm/mm/cache-v3.S
index c2ff3c599fee..2e2bc406a18d 100644
--- a/arch/arm/mm/cache-v3.S
+++ b/arch/arm/mm/cache-v3.S
@@ -13,6 +13,15 @@
#include "proc-macros.S"
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v3_flush_icache_all)
+ mov pc, lr
+ENDPROC(v3_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Invalidate all cache entries in a particular address
@@ -122,6 +131,7 @@ ENDPROC(v3_dma_map_area)
.type v3_cache_fns, #object
ENTRY(v3_cache_fns)
+ .long v3_flush_icache_all
.long v3_flush_kern_cache_all
.long v3_flush_user_cache_all
.long v3_flush_user_cache_range
diff --git a/arch/arm/mm/cache-v4.S b/arch/arm/mm/cache-v4.S
index 4810f7e3e813..a8fefb523f19 100644
--- a/arch/arm/mm/cache-v4.S
+++ b/arch/arm/mm/cache-v4.S
@@ -13,6 +13,15 @@
#include "proc-macros.S"
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v4_flush_icache_all)
+ mov pc, lr
+ENDPROC(v4_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Invalidate all cache entries in a particular address
@@ -134,6 +143,7 @@ ENDPROC(v4_dma_map_area)
.type v4_cache_fns, #object
ENTRY(v4_cache_fns)
+ .long v4_flush_icache_all
.long v4_flush_kern_cache_all
.long v4_flush_user_cache_all
.long v4_flush_user_cache_range
diff --git a/arch/arm/mm/cache-v4wb.S b/arch/arm/mm/cache-v4wb.S
index df8368afa102..d3644db467b7 100644
--- a/arch/arm/mm/cache-v4wb.S
+++ b/arch/arm/mm/cache-v4wb.S
@@ -51,6 +51,17 @@ flush_base:
.text
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v4wb_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(v4wb_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Clean and invalidate all cache entries in a particular address
@@ -244,6 +255,7 @@ ENDPROC(v4wb_dma_unmap_area)
.type v4wb_cache_fns, #object
ENTRY(v4wb_cache_fns)
+ .long v4wb_flush_icache_all
.long v4wb_flush_kern_cache_all
.long v4wb_flush_user_cache_all
.long v4wb_flush_user_cache_range
diff --git a/arch/arm/mm/cache-v4wt.S b/arch/arm/mm/cache-v4wt.S
index 45c70312f43b..49c2b66cf3dd 100644
--- a/arch/arm/mm/cache-v4wt.S
+++ b/arch/arm/mm/cache-v4wt.S
@@ -41,6 +41,17 @@
#define CACHE_DLIMIT 16384
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v4wt_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(v4wt_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Invalidate all cache entries in a particular address
@@ -188,6 +199,7 @@ ENDPROC(v4wt_dma_map_area)
.type v4wt_cache_fns, #object
ENTRY(v4wt_cache_fns)
+ .long v4wt_flush_icache_all
.long v4wt_flush_kern_cache_all
.long v4wt_flush_user_cache_all
.long v4wt_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm1020.S b/arch/arm/mm/proc-arm1020.S
index a6f5f8475b96..bcf748d9f4e2 100644
--- a/arch/arm/mm/proc-arm1020.S
+++ b/arch/arm/mm/proc-arm1020.S
@@ -119,6 +119,20 @@ ENTRY(cpu_arm1020_do_idle)
/* ================================= CACHE ================================ */
.align 5
+
+/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1020_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+#endif
+ mov pc, lr
+ENDPROC(arm1020_flush_icache_all)
+
/*
* flush_user_cache_all()
*
@@ -351,6 +365,7 @@ ENTRY(arm1020_dma_unmap_area)
ENDPROC(arm1020_dma_unmap_area)
ENTRY(arm1020_cache_fns)
+ .long arm1020_flush_icache_all
.long arm1020_flush_kern_cache_all
.long arm1020_flush_user_cache_all
.long arm1020_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm1020e.S b/arch/arm/mm/proc-arm1020e.S
index afc06b9c3133..ab7ec26657ea 100644
--- a/arch/arm/mm/proc-arm1020e.S
+++ b/arch/arm/mm/proc-arm1020e.S
@@ -119,6 +119,20 @@ ENTRY(cpu_arm1020e_do_idle)
/* ================================= CACHE ================================ */
.align 5
+
+/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1020e_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+#endif
+ mov pc, lr
+ENDPROC(arm1020e_flush_icache_all)
+
/*
* flush_user_cache_all()
*
@@ -337,6 +351,7 @@ ENTRY(arm1020e_dma_unmap_area)
ENDPROC(arm1020e_dma_unmap_area)
ENTRY(arm1020e_cache_fns)
+ .long arm1020e_flush_icache_all
.long arm1020e_flush_kern_cache_all
.long arm1020e_flush_user_cache_all
.long arm1020e_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm1022.S b/arch/arm/mm/proc-arm1022.S
index 8915e0ba3fe5..831c5e54e22f 100644
--- a/arch/arm/mm/proc-arm1022.S
+++ b/arch/arm/mm/proc-arm1022.S
@@ -108,6 +108,20 @@ ENTRY(cpu_arm1022_do_idle)
/* ================================= CACHE ================================ */
.align 5
+
+/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1022_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+#endif
+ mov pc, lr
+ENDPROC(arm1022_flush_icache_all)
+
/*
* flush_user_cache_all()
*
@@ -326,6 +340,7 @@ ENTRY(arm1022_dma_unmap_area)
ENDPROC(arm1022_dma_unmap_area)
ENTRY(arm1022_cache_fns)
+ .long arm1022_flush_icache_all
.long arm1022_flush_kern_cache_all
.long arm1022_flush_user_cache_all
.long arm1022_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm1026.S b/arch/arm/mm/proc-arm1026.S
index ff446c5d476f..e3f7e9a166bf 100644
--- a/arch/arm/mm/proc-arm1026.S
+++ b/arch/arm/mm/proc-arm1026.S
@@ -108,6 +108,20 @@ ENTRY(cpu_arm1026_do_idle)
/* ================================= CACHE ================================ */
.align 5
+
+/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1026_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+#endif
+ mov pc, lr
+ENDPROC(arm1026_flush_icache_all)
+
/*
* flush_user_cache_all()
*
@@ -320,6 +334,7 @@ ENTRY(arm1026_dma_unmap_area)
ENDPROC(arm1026_dma_unmap_area)
ENTRY(arm1026_cache_fns)
+ .long arm1026_flush_icache_all
.long arm1026_flush_kern_cache_all
.long arm1026_flush_user_cache_all
.long arm1026_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
index fecf570939f3..6109f278a904 100644
--- a/arch/arm/mm/proc-arm920.S
+++ b/arch/arm/mm/proc-arm920.S
@@ -110,6 +110,17 @@ ENTRY(cpu_arm920_do_idle)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm920_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(arm920_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Invalidate all cache entries in a particular address
@@ -305,6 +316,7 @@ ENTRY(arm920_dma_unmap_area)
ENDPROC(arm920_dma_unmap_area)
ENTRY(arm920_cache_fns)
+ .long arm920_flush_icache_all
.long arm920_flush_kern_cache_all
.long arm920_flush_user_cache_all
.long arm920_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S
index e3cbf87c9480..bb2f0f46a5e6 100644
--- a/arch/arm/mm/proc-arm922.S
+++ b/arch/arm/mm/proc-arm922.S
@@ -112,6 +112,17 @@ ENTRY(cpu_arm922_do_idle)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm922_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(arm922_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Clean and invalidate all cache entries in a particular
@@ -307,6 +318,7 @@ ENTRY(arm922_dma_unmap_area)
ENDPROC(arm922_dma_unmap_area)
ENTRY(arm922_cache_fns)
+ .long arm922_flush_icache_all
.long arm922_flush_kern_cache_all
.long arm922_flush_user_cache_all
.long arm922_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S
index 572424c867b5..c13e01accfe2 100644
--- a/arch/arm/mm/proc-arm925.S
+++ b/arch/arm/mm/proc-arm925.S
@@ -145,6 +145,17 @@ ENTRY(cpu_arm925_do_idle)
mov pc, lr
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm925_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(arm925_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Clean and invalidate all cache entries in a particular
@@ -362,6 +373,7 @@ ENTRY(arm925_dma_unmap_area)
ENDPROC(arm925_dma_unmap_area)
ENTRY(arm925_cache_fns)
+ .long arm925_flush_icache_all
.long arm925_flush_kern_cache_all
.long arm925_flush_user_cache_all
.long arm925_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
index 63d168b4ebe6..42eb4315740b 100644
--- a/arch/arm/mm/proc-arm926.S
+++ b/arch/arm/mm/proc-arm926.S
@@ -111,6 +111,17 @@ ENTRY(cpu_arm926_do_idle)
mov pc, lr
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm926_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(arm926_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Clean and invalidate all cache entries in a particular
@@ -325,6 +336,7 @@ ENTRY(arm926_dma_unmap_area)
ENDPROC(arm926_dma_unmap_area)
ENTRY(arm926_cache_fns)
+ .long arm926_flush_icache_all
.long arm926_flush_kern_cache_all
.long arm926_flush_user_cache_all
.long arm926_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm940.S b/arch/arm/mm/proc-arm940.S
index f6a62822418e..7b11cdb9935f 100644
--- a/arch/arm/mm/proc-arm940.S
+++ b/arch/arm/mm/proc-arm940.S
@@ -68,6 +68,17 @@ ENTRY(cpu_arm940_do_idle)
mov pc, lr
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm940_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(arm940_flush_icache_all)
+
+/*
* flush_user_cache_all()
*/
ENTRY(arm940_flush_user_cache_all)
@@ -254,6 +265,7 @@ ENTRY(arm940_dma_unmap_area)
ENDPROC(arm940_dma_unmap_area)
ENTRY(arm940_cache_fns)
+ .long arm940_flush_icache_all
.long arm940_flush_kern_cache_all
.long arm940_flush_user_cache_all
.long arm940_flush_user_cache_range
diff --git a/arch/arm/mm/proc-arm946.S b/arch/arm/mm/proc-arm946.S
index ea2e7f2eb95b..1a5bbf080342 100644
--- a/arch/arm/mm/proc-arm946.S
+++ b/arch/arm/mm/proc-arm946.S
@@ -75,6 +75,17 @@ ENTRY(cpu_arm946_do_idle)
mov pc, lr
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm946_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(arm946_flush_icache_all)
+
+/*
* flush_user_cache_all()
*/
ENTRY(arm946_flush_user_cache_all)
@@ -296,6 +307,7 @@ ENTRY(arm946_dma_unmap_area)
ENDPROC(arm946_dma_unmap_area)
ENTRY(arm946_cache_fns)
+ .long arm946_flush_icache_all
.long arm946_flush_kern_cache_all
.long arm946_flush_user_cache_all
.long arm946_flush_user_cache_range
diff --git a/arch/arm/mm/proc-feroceon.S b/arch/arm/mm/proc-feroceon.S
index 578da69200cf..b4597edbff97 100644
--- a/arch/arm/mm/proc-feroceon.S
+++ b/arch/arm/mm/proc-feroceon.S
@@ -124,6 +124,17 @@ ENTRY(cpu_feroceon_do_idle)
mov pc, lr
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(feroceon_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(feroceon_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Clean and invalidate all cache entries in a particular
@@ -401,6 +412,7 @@ ENTRY(feroceon_dma_unmap_area)
ENDPROC(feroceon_dma_unmap_area)
ENTRY(feroceon_cache_fns)
+ .long feroceon_flush_icache_all
.long feroceon_flush_kern_cache_all
.long feroceon_flush_user_cache_all
.long feroceon_flush_user_cache_range
@@ -412,6 +424,7 @@ ENTRY(feroceon_cache_fns)
.long feroceon_dma_flush_range
ENTRY(feroceon_range_cache_fns)
+ .long feroceon_flush_icache_all
.long feroceon_flush_kern_cache_all
.long feroceon_flush_user_cache_all
.long feroceon_flush_user_cache_range
diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
index cad07e403044..ec26355cb7c2 100644
--- a/arch/arm/mm/proc-xsc3.S
+++ b/arch/arm/mm/proc-xsc3.S
@@ -141,6 +141,17 @@ ENTRY(cpu_xsc3_do_idle)
/* ================================= CACHE ================================ */
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(xsc3_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(xsc3_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Invalidate all cache entries in a particular address
@@ -325,6 +336,7 @@ ENTRY(xsc3_dma_unmap_area)
ENDPROC(xsc3_dma_unmap_area)
ENTRY(xsc3_cache_fns)
+ .long xsc3_flush_icache_all
.long xsc3_flush_kern_cache_all
.long xsc3_flush_user_cache_all
.long xsc3_flush_user_cache_range
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index cb245edb2c2b..523408c0bb38 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -181,6 +181,17 @@ ENTRY(cpu_xscale_do_idle)
/* ================================= CACHE ================================ */
/*
+ * flush_icache_all()
+ *
+ * Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(xscale_flush_icache_all)
+ mov r0, #0
+ mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache
+ mov pc, lr
+ENDPROC(xscale_flush_icache_all)
+
+/*
* flush_user_cache_all()
*
* Invalidate all cache entries in a particular address
@@ -397,6 +408,7 @@ ENTRY(xscale_dma_unmap_area)
ENDPROC(xscale_dma_unmap_area)
ENTRY(xscale_cache_fns)
+ .long xscale_flush_icache_all
.long xscale_flush_kern_cache_all
.long xscale_flush_user_cache_all
.long xscale_flush_user_cache_range