diff options
Diffstat (limited to 'arch/mips/bcm47xx/nvram.c')
| -rw-r--r-- | arch/mips/bcm47xx/nvram.c | 44 |
1 files changed, 32 insertions, 12 deletions
diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c index 2bed73a684ae..e07976bbb739 100644 --- a/arch/mips/bcm47xx/nvram.c +++ b/arch/mips/bcm47xx/nvram.c @@ -23,13 +23,13 @@ static char nvram_buf[NVRAM_SPACE]; static const u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000}; -static u32 find_nvram_size(u32 end) +static u32 find_nvram_size(void __iomem *end) { - struct nvram_header *header; + struct nvram_header __iomem *header; int i; for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) { - header = (struct nvram_header *)KSEG1ADDR(end - nvram_sizes[i]); + header = (struct nvram_header *)(end - nvram_sizes[i]); if (header->magic == NVRAM_HEADER) return nvram_sizes[i]; } @@ -38,35 +38,39 @@ static u32 find_nvram_size(u32 end) } /* Probe for NVRAM header */ -static int nvram_find_and_copy(u32 base, u32 lim) +static int nvram_find_and_copy(void __iomem *iobase, u32 lim) { - struct nvram_header *header; + struct nvram_header __iomem *header; int i; u32 off; u32 *src, *dst; u32 size; + if (nvram_buf[0]) { + pr_warn("nvram already initialized\n"); + return -EEXIST; + } + /* TODO: when nvram is on nand flash check for bad blocks first. */ off = FLASH_MIN; while (off <= lim) { /* Windowed flash access */ - size = find_nvram_size(base + off); + size = find_nvram_size(iobase + off); if (size) { - header = (struct nvram_header *)KSEG1ADDR(base + off - - size); + header = (struct nvram_header *)(iobase + off - size); goto found; } off <<= 1; } /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */ - header = (struct nvram_header *) KSEG1ADDR(base + 4096); + header = (struct nvram_header *)(iobase + 4096); if (header->magic == NVRAM_HEADER) { size = NVRAM_SPACE; goto found; } - header = (struct nvram_header *) KSEG1ADDR(base + 1024); + header = (struct nvram_header *)(iobase + 1024); if (header->magic == NVRAM_HEADER) { size = NVRAM_SPACE; goto found; @@ -94,6 +98,22 @@ found: return 0; } +static int bcm47xx_nvram_init_from_mem(u32 base, u32 lim) +{ + void __iomem *iobase; + int err; + + iobase = ioremap_nocache(base, lim); + if (!iobase) + return -ENOMEM; + + err = nvram_find_and_copy(iobase, lim); + + iounmap(iobase); + + return err; +} + #ifdef CONFIG_BCM47XX_SSB static int nvram_init_ssb(void) { @@ -109,7 +129,7 @@ static int nvram_init_ssb(void) return -ENXIO; } - return nvram_find_and_copy(base, lim); + return bcm47xx_nvram_init_from_mem(base, lim); } #endif @@ -139,7 +159,7 @@ static int nvram_init_bcma(void) return -ENXIO; } - return nvram_find_and_copy(base, lim); + return bcm47xx_nvram_init_from_mem(base, lim); } #endif |