target/linux/brcm2708/patches-4.14/950-0001-arm-partially-revert-702b94bff3c50542a6e4ab9a4f4cef0.patch

   1 From a45a0eb188581a6c1f57b7adc4f66f5754927ad3 Mon Sep 17 00:00:00 2001
   2 From: Dan Pasanen <dan.pasanen@gmail.com>
   3 Date: Thu, 21 Sep 2017 09:55:42 -0500
   4 Subject: [PATCH 001/454] arm: partially revert
   5  702b94bff3c50542a6e4ab9a4f4cef093262fe65
   6
   7 * Re-expose some dmi APIs for use in VCSM
   8 ---
   9  arch/arm/include/asm/cacheflush.h | 21 +++++++++++++++++++++
  10  arch/arm/include/asm/glue-cache.h |  2 ++
  11  arch/arm/mm/proc-macros.S         |  2 ++
  12  arch/arm/mm/proc-syms.c           |  3 +++
  13  4 files changed, 28 insertions(+)
  14
  15 --- a/arch/arm/include/asm/cacheflush.h
  16 +++ b/arch/arm/include/asm/cacheflush.h
  17 @@ -94,6 +94,21 @@
  18   *     DMA Cache Coherency
  19   *     ===================
  20   *
  21 + *     dma_inv_range(start, end)
  22 + *
  23 + *             Invalidate (discard) the specified virtual address range.
  24 + *             May not write back any entries.  If 'start' or 'end'
  25 + *             are not cache line aligned, those lines must be written
  26 + *             back.
  27 + *             - start  - virtual start address
  28 + *             - end    - virtual end address
  29 + *
  30 + *     dma_clean_range(start, end)
  31 + *
  32 + *             Clean (write back) the specified virtual address range.
  33 + *             - start  - virtual start address
  34 + *             - end    - virtual end address
  35 + *
  36   *     dma_flush_range(start, end)
  37   *
  38   *             Clean and invalidate the specified virtual address range.
  39 @@ -115,6 +130,8 @@ struct cpu_cache_fns {
  40         void (*dma_map_area)(const void *, size_t, int);
  41         void (*dma_unmap_area)(const void *, size_t, int);
  42
  43 +       void (*dma_inv_range)(const void *, const void *);
  44 +       void (*dma_clean_range)(const void *, const void *);
  45         void (*dma_flush_range)(const void *, const void *);
  46  } __no_randomize_layout;
  47
  48 @@ -140,6 +157,8 @@ extern struct cpu_cache_fns cpu_cache;
  49   * is visible to DMA, or data written by DMA to system memory is
  50   * visible to the CPU.
  51   */
  52 +#define dmac_inv_range                 cpu_cache.dma_inv_range
  53 +#define dmac_clean_range               cpu_cache.dma_clean_range
  54  #define dmac_flush_range               cpu_cache.dma_flush_range
  55
  56  #else
  57 @@ -159,6 +178,8 @@ extern void __cpuc_flush_dcache_area(voi
  58   * is visible to DMA, or data written by DMA to system memory is
  59   * visible to the CPU.
  60   */
  61 +extern void dmac_inv_range(const void *, const void *);
  62 +extern void dmac_clean_range(const void *, const void *);
  63  extern void dmac_flush_range(const void *, const void *);
  64
  65  #endif
  66 --- a/arch/arm/include/asm/glue-cache.h
  67 +++ b/arch/arm/include/asm/glue-cache.h
  68 @@ -154,6 +154,8 @@ static inline void nop_dma_unmap_area(co
  69  #define __cpuc_coherent_user_range     __glue(_CACHE,_coherent_user_range)
  70  #define __cpuc_flush_dcache_area       __glue(_CACHE,_flush_kern_dcache_area)
  71
  72 +#define dmac_inv_range                 __glue(_CACHE,_dma_inv_range)
  73 +#define dmac_clean_range               __glue(_CACHE,_dma_clean_range)
  74  #define dmac_flush_range               __glue(_CACHE,_dma_flush_range)
  75  #endif
  76
  77 --- a/arch/arm/mm/proc-macros.S
  78 +++ b/arch/arm/mm/proc-macros.S
  79 @@ -335,6 +335,8 @@ ENTRY(\name\()_cache_fns)
  80         .long   \name\()_flush_kern_dcache_area
  81         .long   \name\()_dma_map_area
  82         .long   \name\()_dma_unmap_area
  83 +       .long   \name\()_dma_inv_range
  84 +       .long   \name\()_dma_clean_range
  85         .long   \name\()_dma_flush_range
  86         .size   \name\()_cache_fns, . - \name\()_cache_fns
  87  .endm
  88 --- a/arch/arm/mm/proc-syms.c
  89 +++ b/arch/arm/mm/proc-syms.c
  90 @@ -30,6 +30,9 @@ EXPORT_SYMBOL(__cpuc_flush_user_all);
  91  EXPORT_SYMBOL(__cpuc_flush_user_range);
  92  EXPORT_SYMBOL(__cpuc_coherent_kern_range);
  93  EXPORT_SYMBOL(__cpuc_flush_dcache_area);
  94 +EXPORT_SYMBOL(dmac_inv_range);
  95 +EXPORT_SYMBOL(dmac_clean_range);
  96 +EXPORT_SYMBOL(dmac_flush_range);
  97  #else
  98  EXPORT_SYMBOL(cpu_cache);
  99  #endif