target/linux/brcm47xx/patches-3.18/030-01-MIPS-BCM47XX-Get-rid-of-calls-to-KSEG1ADDR.patch

   1 From 8d602dd0f984e8488ab891344ebdb6e1f3128c4a Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
   3 Date: Wed, 3 Sep 2014 22:51:06 +0200
   4 Subject: [PATCH 154/158] MIPS: BCM47XX: Get rid of calls to KSEG1ADDR
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 We should be using ioremap_nocache helper which handles remaps in a
  10 smarter way.
  11
  12 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  13 Cc: linux-mips@linux-mips.org
  14 Cc: Hauke Mehrtens <hauke@hauke-m.de>
  15 Patchwork: http://patchwork.linux-mips.org/patch/7611/
  16 Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
  17 ---
  18  arch/mips/bcm47xx/nvram.c | 44 ++++++++++++++++++++++++++++++++------------
  19  1 file changed, 32 insertions(+), 12 deletions(-)
  20
  21 diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c
  22 index 2bed73a..e07976b 100644
  23 --- a/arch/mips/bcm47xx/nvram.c
  24 +++ b/arch/mips/bcm47xx/nvram.c
  25 @@ -23,13 +23,13 @@
  26  static char nvram_buf[NVRAM_SPACE];
  27  static const u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000};
  28
  29 -static u32 find_nvram_size(u32 end)
  30 +static u32 find_nvram_size(void __iomem *end)
  31  {
  32 -       struct nvram_header *header;
  33 +       struct nvram_header __iomem *header;
  34         int i;
  35
  36         for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) {
  37 -               header = (struct nvram_header *)KSEG1ADDR(end - nvram_sizes[i]);
  38 +               header = (struct nvram_header *)(end - nvram_sizes[i]);
  39                 if (header->magic == NVRAM_HEADER)
  40                         return nvram_sizes[i];
  41         }
  42 @@ -38,35 +38,39 @@ static u32 find_nvram_size(u32 end)
  43  }
  44
  45  /* Probe for NVRAM header */
  46 -static int nvram_find_and_copy(u32 base, u32 lim)
  47 +static int nvram_find_and_copy(void __iomem *iobase, u32 lim)
  48  {
  49 -       struct nvram_header *header;
  50 +       struct nvram_header __iomem *header;
  51         int i;
  52         u32 off;
  53         u32 *src, *dst;
  54         u32 size;
  55
  56 +       if (nvram_buf[0]) {
  57 +               pr_warn("nvram already initialized\n");
  58 +               return -EEXIST;
  59 +       }
  60 +
  61         /* TODO: when nvram is on nand flash check for bad blocks first. */
  62         off = FLASH_MIN;
  63         while (off <= lim) {
  64                 /* Windowed flash access */
  65 -               size = find_nvram_size(base + off);
  66 +               size = find_nvram_size(iobase + off);
  67                 if (size) {
  68 -                       header = (struct nvram_header *)KSEG1ADDR(base + off -
  69 -                                                                 size);
  70 +                       header = (struct nvram_header *)(iobase + off - size);
  71                         goto found;
  72                 }
  73                 off <<= 1;
  74         }
  75
  76         /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */
  77 -       header = (struct nvram_header *) KSEG1ADDR(base + 4096);
  78 +       header = (struct nvram_header *)(iobase + 4096);
  79         if (header->magic == NVRAM_HEADER) {
  80                 size = NVRAM_SPACE;
  81                 goto found;
  82         }
  83
  84 -       header = (struct nvram_header *) KSEG1ADDR(base + 1024);
  85 +       header = (struct nvram_header *)(iobase + 1024);
  86         if (header->magic == NVRAM_HEADER) {
  87                 size = NVRAM_SPACE;
  88                 goto found;
  89 @@ -94,6 +98,22 @@ found:
  90         return 0;
  91  }
  92
  93 +static int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
  94 +{
  95 +       void __iomem *iobase;
  96 +       int err;
  97 +
  98 +       iobase = ioremap_nocache(base, lim);
  99 +       if (!iobase)
 100 +               return -ENOMEM;
 101 +
 102 +       err = nvram_find_and_copy(iobase, lim);
 103 +
 104 +       iounmap(iobase);
 105 +
 106 +       return err;
 107 +}
 108 +
 109  #ifdef CONFIG_BCM47XX_SSB
 110  static int nvram_init_ssb(void)
 111  {
 112 @@ -109,7 +129,7 @@ static int nvram_init_ssb(void)
 113                 return -ENXIO;
 114         }
 115
 116 -       return nvram_find_and_copy(base, lim);
 117 +       return bcm47xx_nvram_init_from_mem(base, lim);
 118  }
 119  #endif
 120
 121 @@ -139,7 +159,7 @@ static int nvram_init_bcma(void)
 122                 return -ENXIO;
 123         }
 124
 125 -       return nvram_find_and_copy(base, lim);
 126 +       return bcm47xx_nvram_init_from_mem(base, lim);
 127  }
 128  #endif
 129
 130 --
 131 1.8.4.5
 132