[PATCH 16/21] ARM: dma-mapping: bring back dmac_{clean,inv}_range

Arnd Bergmann
2023-03-27T12:17:51Z

From: Arnd Bergmann <arnd@arndb.de>

These were remove ages ago in commit 702b94bff3c5 ("ARM: dma-mapping:
remove dmac_clean_range and dmac_inv_range") in an effort to sanitize
the dma-mapping API.

Now this logic is getting moved into the generic dma-mapping
implementation in order to give architectures less control over
it, which requires reverting that earlier work.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/arm/include/asm/cacheflush.h | 21 +++++++++++++++++++++
arch/arm/include/asm/glue-cache.h | 4 ++++
arch/arm/mm/cache-fa.S | 4 ++--
arch/arm/mm/cache-nop.S | 6 ++++++
arch/arm/mm/cache-v4.S | 5 +++++
arch/arm/mm/cache-v4wb.S | 4 ++--
arch/arm/mm/cache-v4wt.S | 14 +++++++++++++-
arch/arm/mm/cache-v6.S | 4 ++--
arch/arm/mm/cache-v7.S | 6 ++++--
arch/arm/mm/cache-v7m.S | 4 ++--
arch/arm/mm/proc-arm1020.S | 4 ++--
arch/arm/mm/proc-arm1020e.S | 4 ++--
arch/arm/mm/proc-arm1022.S | 4 ++--
arch/arm/mm/proc-arm1026.S | 4 ++--
arch/arm/mm/proc-arm920.S | 4 ++--
arch/arm/mm/proc-arm922.S | 4 ++--
arch/arm/mm/proc-arm925.S | 4 ++--
arch/arm/mm/proc-arm926.S | 4 ++--
arch/arm/mm/proc-arm940.S | 4 ++--
arch/arm/mm/proc-arm946.S | 4 ++--
arch/arm/mm/proc-feroceon.S | 8 ++++----
arch/arm/mm/proc-macros.S | 2 ++
arch/arm/mm/proc-mohawk.S | 4 ++--
arch/arm/mm/proc-xsc3.S | 4 ++--
arch/arm/mm/proc-xscale.S | 6 ++++--
25 files changed, 95 insertions(+), 41 deletions(-)

diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index a094f964c869..04462bfe9130 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -91,6 +91,21 @@
* DMA Cache Coherency
* ===================
*
+ * 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
+ *
+ * dma_clean_range(start, end)
+ *
+ * Clean (write back) the specified virtual address range.
+ * - start - virtual start address
+ * - end - virtual end address
+ *
* dma_flush_range(start, end)
*
* Clean and invalidate the specified virtual address range.
@@ -112,6 +127,8 @@ struct cpu_cache_fns {
void (*dma_map_area)(const void *, size_t, int);
void (*dma_unmap_area)(const void *, size_t, int);

+ void (*dma_clean_range)(const void *, const void *);
+ void (*dma_inv_range)(const void *, const void *);
void (*dma_flush_range)(const void *, const void *);
} __no_randomize_layout;

@@ -137,6 +154,8 @@ extern struct cpu_cache_fns cpu_cache;
* is visible to DMA, or data written by DMA to system memory is
* visible to the CPU.
*/
+#define dmac_clean_range cpu_cache.dma_clean_range
+#define dmac_inv_range cpu_cache.dma_inv_range
#define dmac_flush_range cpu_cache.dma_flush_range

#else
@@ -156,6 +175,8 @@ extern void __cpuc_flush_dcache_area(void *, size_t);
* is visible to DMA, or data written by DMA to system memory is
* visible to the CPU.
*/
+extern void dmac_clean_range(const void *, const void *);
+extern void dmac_inv_range(const void *, const void *);
extern void dmac_flush_range(const void *, const void *);

#endif
diff --git a/arch/arm/include/asm/glue-cache.h b/arch/arm/include/asm/glue-cache.h
index 724f8dac1e5b..d8c93b483adf 100644
--- a/arch/arm/include/asm/glue-cache.h
+++ b/arch/arm/include/asm/glue-cache.h
@@ -139,6 +139,8 @@ static inline int nop_coherent_user_range(unsigned long a,
unsigned long b) { return 0; }
static inline void nop_flush_kern_dcache_area(void *a, size_t s) { }

+static inline void nop_dma_clean_range(const void *a, const void *b) { }
+static inline void nop_dma_inv_range(const void *a, const void *b) { }
static inline void nop_dma_flush_range(const void *a, const void *b) { }

static inline void nop_dma_map_area(const void *s, size_t l, int f) { }
@@ -155,6 +157,8 @@ static inline void nop_dma_unmap_area(const void *s, size_t l, int f) { }
#define __cpuc_coherent_user_range __glue(_CACHE,_coherent_user_range)
#define __cpuc_flush_dcache_area __glue(_CACHE,_flush_kern_dcache_area)

+#define dmac_clean_range __glue(_CACHE,_dma_clean_range)
+#define dmac_inv_range __glue(_CACHE,_dma_inv_range)
#define dmac_flush_range __glue(_CACHE,_dma_flush_range)
#endif

diff --git a/arch/arm/mm/cache-fa.S b/arch/arm/mm/cache-fa.S
index 3a464d1649b4..abc3d58948dd 100644
--- a/arch/arm/mm/cache-fa.S
+++ b/arch/arm/mm/cache-fa.S
@@ -166,7 +166,7 @@ ENTRY(fa_flush_kern_dcache_area)
* - start - virtual start address
* - end - virtual end address
*/
-fa_dma_inv_range:
+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
@@ -189,7 +189,7 @@ fa_dma_inv_range:
* - start - virtual start address
* - end - virtual end address
*/
-fa_dma_clean_range:
+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
diff --git a/arch/arm/mm/cache-nop.S b/arch/arm/mm/cache-nop.S
index 72d939ef8798..a058544d6c2b 100644
--- a/arch/arm/mm/cache-nop.S
+++ b/arch/arm/mm/cache-nop.S
@@ -32,6 +32,12 @@ ENDPROC(nop_coherent_user_range)
.globl nop_flush_kern_dcache_area
.equ nop_flush_kern_dcache_area, nop_flush_icache_all

+ .globl nop_dma_clean_range
+ .equ nop_dma_clean_range, nop_flush_icache_all
+
+ .globl nop_dma_inv_range
+ .equ nop_dma_inv_range, nop_flush_icache_all
+
.globl nop_dma_flush_range
.equ nop_dma_flush_range, nop_flush_icache_all

diff --git a/arch/arm/mm/cache-v4.S b/arch/arm/mm/cache-v4.S
index e2b104876340..b747e591109c 100644
--- a/arch/arm/mm/cache-v4.S
+++ b/arch/arm/mm/cache-v4.S
@@ -103,17 +103,22 @@ ENTRY(v4_flush_kern_dcache_area)

/*
* dma_flush_range(start, end)
+ * dma_inv_range(start, end)
*
* Clean and invalidate the specified virtual address range.
+ * As only write-through caches are supported here, this is the
+ * same as invalidate, while the clean operation does nothing.
*
* - start - virtual start address
* - end - virtual end address
*/
+ENTRY(v4_dma_inv_range)
ENTRY(v4_dma_flush_range)
#ifdef CONFIG_CPU_CP15
mov r0, #0
mcr p15, 0, r0, c7, c7, 0 @ flush ID cache
#endif
+ENTRY(v4_dma_clean_range)
ret lr

/*
diff --git a/arch/arm/mm/cache-v4wb.S b/arch/arm/mm/cache-v4wb.S
index 905ac2fa2b1e..55f609eae38d 100644
--- a/arch/arm/mm/cache-v4wb.S
+++ b/arch/arm/mm/cache-v4wb.S
@@ -183,7 +183,7 @@ ENTRY(v4wb_coherent_user_range)
* - start - virtual start address
* - end - virtual end address
*/
-v4wb_dma_inv_range:
+ENTRY(v4wb_dma_inv_range)
tst r0, #CACHE_DLINESIZE - 1
bic r0, r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -204,7 +204,7 @@ v4wb_dma_inv_range:
* - start - virtual start address
* - end - virtual end address
*/
-v4wb_dma_clean_range:
+ENTRY(v4wb_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
diff --git a/arch/arm/mm/cache-v4wt.S b/arch/arm/mm/cache-v4wt.S
index 652218752f88..1a88627ec09b 100644
--- a/arch/arm/mm/cache-v4wt.S
+++ b/arch/arm/mm/cache-v4wt.S
@@ -152,7 +152,7 @@ ENTRY(v4wt_flush_kern_dcache_area)
* - start - virtual start address
* - end - virtual end address
*/
-v4wt_dma_inv_range:
+ENTRY(v4wt_dma_inv_range)
bic r0, r0, #CACHE_DLINESIZE - 1
1: mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
add r0, r0, #CACHE_DLINESIZE
@@ -171,6 +171,18 @@ v4wt_dma_inv_range:
.globl v4wt_dma_flush_range
.equ v4wt_dma_flush_range, v4wt_dma_inv_range

+/*
+ * dma_clean_range(start, end)
+ *
+ * Clean the specified virtual address range.
+ * Empty implementation for writethrough caches.
+ *
+ * - start - virtual start address
+ * - end - virtual end address
+ */
+ .globl v4wt_dma_clean_range
+ .equ v4wt_dma_clean_range, v4wt_dma_unmap_area
+
/*
* dma_map_area(start, size, dir)
* - start - kernel virtual start address
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S
index 250c83bf7158..abae7ff5defc 100644
--- a/arch/arm/mm/cache-v6.S
+++ b/arch/arm/mm/cache-v6.S
@@ -200,7 +200,7 @@ ENTRY(v6_flush_kern_dcache_area)
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v6_dma_inv_range:
+ENTRY(v6_dma_inv_range)
#ifdef CONFIG_DMA_CACHE_RWFO
ldrb r2, [r0] @ read for ownership
strb r2, [r0] @ write for ownership
@@ -245,7 +245,7 @@ v6_dma_inv_range:
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v6_dma_clean_range:
+ENTRY(v6_dma_clean_range)
bic r0, r0, #D_CACHE_LINE_SIZE - 1
1:
#ifdef CONFIG_DMA_CACHE_RWFO
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S
index 127afe2096ba..b16a0d2a7cce 100644
--- a/arch/arm/mm/cache-v7.S
+++ b/arch/arm/mm/cache-v7.S
@@ -361,7 +361,7 @@ ENDPROC(v7_flush_kern_dcache_area)
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v7_dma_inv_range:
+ENTRY(v7_dma_inv_range)
dcache_line_size r2, r3
sub r3, r2, #1
tst r0, r3
@@ -391,7 +391,7 @@ ENDPROC(v7_dma_inv_range)
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v7_dma_clean_range:
+ENTRY(v7_dma_clean_range)
dcache_line_size r2, r3
sub r3, r2, #1
bic r0, r0, r3
@@ -477,6 +477,8 @@ ENDPROC(v7_dma_unmap_area)

globl_equ b15_dma_map_area, v7_dma_map_area
globl_equ b15_dma_unmap_area, v7_dma_unmap_area
+ globl_equ b15_dma_clean_range, v7_dma_clean_range
+ globl_equ b15_dma_inv_range, v7_dma_inv_range
globl_equ b15_dma_flush_range, v7_dma_flush_range

define_cache_functions b15
diff --git a/arch/arm/mm/cache-v7m.S b/arch/arm/mm/cache-v7m.S
index eb60b5e5e2ad..4fc6e0028e40 100644
--- a/arch/arm/mm/cache-v7m.S
+++ b/arch/arm/mm/cache-v7m.S
@@ -364,7 +364,7 @@ ENDPROC(v7m_flush_kern_dcache_area)
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v7m_dma_inv_range:
+ENTRY(v7m_dma_inv_range)
dcache_line_size r2, r3
sub r3, r2, #1
tst r0, r3
@@ -390,7 +390,7 @@ ENDPROC(v7m_dma_inv_range)
* - start - virtual start address of region
* - end - virtual end address of region
*/
-v7m_dma_clean_range:
+ENTRY(v7m_dma_clean_range)
dcache_line_size r2, r3
sub r3, r2, #1
bic r0, r0, r3
diff --git a/arch/arm/mm/proc-arm1020.S b/arch/arm/mm/proc-arm1020.S
index 6837cf7a4812..0089e366f4e8 100644
--- a/arch/arm/mm/proc-arm1020.S
+++ b/arch/arm/mm/proc-arm1020.S
@@ -263,7 +263,7 @@ ENTRY(arm1020_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm1020_dma_inv_range:
+ENTRY(arm1020_dma_inv_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
tst r0, #CACHE_DLINESIZE - 1
@@ -293,7 +293,7 @@ arm1020_dma_inv_range:
*
* (same as v4wb)
*/
-arm1020_dma_clean_range:
+ENTRY(arm1020_dma_clean_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
bic r0, r0, #CACHE_DLINESIZE - 1
diff --git a/arch/arm/mm/proc-arm1020e.S b/arch/arm/mm/proc-arm1020e.S
index df49b10250b8..c662e55a76fa 100644
--- a/arch/arm/mm/proc-arm1020e.S
+++ b/arch/arm/mm/proc-arm1020e.S
@@ -256,7 +256,7 @@ ENTRY(arm1020e_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm1020e_dma_inv_range:
+ENTRY(arm1020e_dma_inv_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
tst r0, #CACHE_DLINESIZE - 1
@@ -282,7 +282,7 @@ arm1020e_dma_inv_range:
*
* (same as v4wb)
*/
-arm1020e_dma_clean_range:
+ENTRY(arm1020e_dma_clean_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
bic r0, r0, #CACHE_DLINESIZE - 1
diff --git a/arch/arm/mm/proc-arm1022.S b/arch/arm/mm/proc-arm1022.S
index e89ce467f672..e77328906bc5 100644
--- a/arch/arm/mm/proc-arm1022.S
+++ b/arch/arm/mm/proc-arm1022.S
@@ -256,7 +256,7 @@ ENTRY(arm1022_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm1022_dma_inv_range:
+ENTRY(arm1022_dma_inv_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
tst r0, #CACHE_DLINESIZE - 1
@@ -282,7 +282,7 @@ arm1022_dma_inv_range:
*
* (same as v4wb)
*/
-arm1022_dma_clean_range:
+ENTRY(arm1022_dma_clean_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
bic r0, r0, #CACHE_DLINESIZE - 1
diff --git a/arch/arm/mm/proc-arm1026.S b/arch/arm/mm/proc-arm1026.S
index 7fdd1a205e8e..a23f9fa28d07 100644
--- a/arch/arm/mm/proc-arm1026.S
+++ b/arch/arm/mm/proc-arm1026.S
@@ -250,7 +250,7 @@ ENTRY(arm1026_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm1026_dma_inv_range:
+ENTRY(arm1026_dma_inv_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
tst r0, #CACHE_DLINESIZE - 1
@@ -276,7 +276,7 @@ arm1026_dma_inv_range:
*
* (same as v4wb)
*/
-arm1026_dma_clean_range:
+ENTRY(arm1026_dma_clean_range)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_DISABLE
bic r0, r0, #CACHE_DLINESIZE - 1
diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
index a234cd8ba5e6..4c918ab106f3 100644
--- a/arch/arm/mm/proc-arm920.S
+++ b/arch/arm/mm/proc-arm920.S
@@ -232,7 +232,7 @@ ENTRY(arm920_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm920_dma_inv_range:
+ENTRY(arm920_dma_inv_range)
tst r0, #CACHE_DLINESIZE - 1
bic r0, r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -255,7 +255,7 @@ arm920_dma_inv_range:
*
* (same as v4wb)
*/
-arm920_dma_clean_range:
+ENTRY(arm920_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
diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S
index 53c029dcfd83..6ac7bb7d94a4 100644
--- a/arch/arm/mm/proc-arm922.S
+++ b/arch/arm/mm/proc-arm922.S
@@ -234,7 +234,7 @@ ENTRY(arm922_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm922_dma_inv_range:
+ENTRY(arm922_dma_inv_range)
tst r0, #CACHE_DLINESIZE - 1
bic r0, r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -257,7 +257,7 @@ arm922_dma_inv_range:
*
* (same as v4wb)
*/
-arm922_dma_clean_range:
+ENTRY(arm922_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
diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S
index 0bfad62ea858..860f0074ff81 100644
--- a/arch/arm/mm/proc-arm925.S
+++ b/arch/arm/mm/proc-arm925.S
@@ -280,7 +280,7 @@ ENTRY(arm925_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm925_dma_inv_range:
+ENTRY(arm925_dma_inv_range)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
tst r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -305,7 +305,7 @@ arm925_dma_inv_range:
*
* (same as v4wb)
*/
-arm925_dma_clean_range:
+ENTRY(arm925_dma_clean_range)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
bic r0, r0, #CACHE_DLINESIZE - 1
1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
index 0487a2c3439b..519f62e023c5 100644
--- a/arch/arm/mm/proc-arm926.S
+++ b/arch/arm/mm/proc-arm926.S
@@ -243,7 +243,7 @@ ENTRY(arm926_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-arm926_dma_inv_range:
+ENTRY(arm926_dma_inv_range)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
tst r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -268,7 +268,7 @@ arm926_dma_inv_range:
*
* (same as v4wb)
*/
-arm926_dma_clean_range:
+ENTRY(arm926_dma_clean_range)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
bic r0, r0, #CACHE_DLINESIZE - 1
1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
diff --git a/arch/arm/mm/proc-arm940.S b/arch/arm/mm/proc-arm940.S
index cf9bfcc825ca..14dda5c5ee4a 100644
--- a/arch/arm/mm/proc-arm940.S
+++ b/arch/arm/mm/proc-arm940.S
@@ -177,7 +177,7 @@ ENTRY(arm940_flush_kern_dcache_area)
* - start - virtual start address
* - end - virtual end address
*/
-arm940_dma_inv_range:
+ENTRY(arm940_dma_inv_range)
mov ip, #0
mov r1, #(CACHE_DSEGMENTS - 1) << 4 @ 4 segments
1: orr r3, r1, #(CACHE_DENTRIES - 1) << 26 @ 64 entries
@@ -198,7 +198,7 @@ arm940_dma_inv_range:
* - start - virtual start address
* - end - virtual end address
*/
-arm940_dma_clean_range:
+ENTRY(arm940_dma_clean_range)
ENTRY(cpu_arm940_dcache_clean_area)
mov ip, #0
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
diff --git a/arch/arm/mm/proc-arm946.S b/arch/arm/mm/proc-arm946.S
index 6fb3898ad1cd..91f62a7d334b 100644
--- a/arch/arm/mm/proc-arm946.S
+++ b/arch/arm/mm/proc-arm946.S
@@ -222,7 +222,7 @@ ENTRY(arm946_flush_kern_dcache_area)
* - end - virtual end address
* (same as arm926)
*/
-arm946_dma_inv_range:
+ENTRY(arm946_dma_inv_range)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
tst r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -247,7 +247,7 @@ arm946_dma_inv_range:
*
* (same as arm926)
*/
-arm946_dma_clean_range:
+ENTRY(arm946_dma_clean_range)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
bic r0, r0, #CACHE_DLINESIZE - 1
1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
diff --git a/arch/arm/mm/proc-feroceon.S b/arch/arm/mm/proc-feroceon.S
index 61ce82aca6f0..86122bad6d9b 100644
--- a/arch/arm/mm/proc-feroceon.S
+++ b/arch/arm/mm/proc-feroceon.S
@@ -271,7 +271,7 @@ ENTRY(feroceon_range_flush_kern_dcache_area)
* (same as v4wb)
*/
.align 5
-feroceon_dma_inv_range:
+ENTRY(feroceon_dma_inv_range)
tst r0, #CACHE_DLINESIZE - 1
bic r0, r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -285,7 +285,7 @@ feroceon_dma_inv_range:
ret lr

.align 5
-feroceon_range_dma_inv_range:
+ENTRY(feroceon_range_dma_inv_range)
mrs r2, cpsr
tst r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -311,7 +311,7 @@ feroceon_range_dma_inv_range:
* (same as v4wb)
*/
.align 5
-feroceon_dma_clean_range:
+ENTRY(feroceon_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
@@ -321,7 +321,7 @@ feroceon_dma_clean_range:
ret lr

.align 5
-feroceon_range_dma_clean_range:
+ENTRY(feroceon_range_dma_clean_range)
mrs r2, cpsr
cmp r1, r0
subne r1, r1, #1 @ top address is inclusive
diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
index e43f6d716b4b..c1328955fd2a 100644
--- a/arch/arm/mm/proc-macros.S
+++ b/arch/arm/mm/proc-macros.S
@@ -334,6 +334,8 @@ ENTRY(\name\()_cache_fns)
.long \name\()_flush_kern_dcache_area
.long \name\()_dma_map_area
.long \name\()_dma_unmap_area
+ .long \name\()_dma_clean_range
+ .long \name\()_dma_inv_range
.long \name\()_dma_flush_range
.size \name\()_cache_fns, . - \name\()_cache_fns
.endm
diff --git a/arch/arm/mm/proc-mohawk.S b/arch/arm/mm/proc-mohawk.S
index 1645ccaffe96..db3a2f00372a 100644
--- a/arch/arm/mm/proc-mohawk.S
+++ b/arch/arm/mm/proc-mohawk.S
@@ -216,7 +216,7 @@ ENTRY(mohawk_flush_kern_dcache_area)
*
* (same as v4wb)
*/
-mohawk_dma_inv_range:
+ENTRY(mohawk_dma_inv_range)
tst r0, #CACHE_DLINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
tst r1, #CACHE_DLINESIZE - 1
@@ -239,7 +239,7 @@ mohawk_dma_inv_range:
*
* (same as v4wb)
*/
-mohawk_dma_clean_range:
+ENTRY(mohawk_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
diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
index a17afe7e195a..6db611a945f3 100644
--- a/arch/arm/mm/proc-xsc3.S
+++ b/arch/arm/mm/proc-xsc3.S
@@ -263,7 +263,7 @@ ENTRY(xsc3_flush_kern_dcache_area)
* - start - virtual start address
* - end - virtual end address
*/
-xsc3_dma_inv_range:
+ENTRY(xsc3_dma_inv_range)
tst r0, #CACHELINESIZE - 1
bic r0, r0, #CACHELINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean L1 D line
@@ -284,7 +284,7 @@ xsc3_dma_inv_range:
* - start - virtual start address
* - end - virtual end address
*/
-xsc3_dma_clean_range:
+ENTRY(xsc3_dma_clean_range)
bic r0, r0, #CACHELINESIZE - 1
1: mcr p15, 0, r0, c7, c10, 1 @ clean L1 D line
add r0, r0, #CACHELINESIZE
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index d82590aa71c0..291dec830714 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -323,7 +323,7 @@ ENTRY(xscale_flush_kern_dcache_area)
* - start - virtual start address
* - end - virtual end address
*/
-xscale_dma_inv_range:
+ENTRY(xscale_dma_inv_range)
tst r0, #CACHELINESIZE - 1
bic r0, r0, #CACHELINESIZE - 1
mcrne p15, 0, r0, c7, c10, 1 @ clean D entry
@@ -344,7 +344,7 @@ xscale_dma_inv_range:
* - start - virtual start address
* - end - virtual end address
*/
-xscale_dma_clean_range:
+ENTRY(xscale_dma_clean_range)
bic r0, r0, #CACHELINESIZE - 1
1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
add r0, r0, #CACHELINESIZE
@@ -445,6 +445,8 @@ ENDPROC(xscale_dma_unmap_area)
a0_alias coherent_kern_range
a0_alias coherent_user_range
a0_alias flush_kern_dcache_area
+ a0_alias dma_clean_range
+ a0_alias dma_inv_range
a0_alias dma_flush_range
a0_alias dma_unmap_area

--
2.39.2