diff options
Diffstat (limited to 'drivers/firmware/broadcom/bcm47xx_nvram.c')
| -rw-r--r-- | drivers/firmware/broadcom/bcm47xx_nvram.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/firmware/broadcom/bcm47xx_nvram.c b/drivers/firmware/broadcom/bcm47xx_nvram.c index 835ece9c00f1..b04007adc79f 100644 --- a/drivers/firmware/broadcom/bcm47xx_nvram.c +++ b/drivers/firmware/broadcom/bcm47xx_nvram.c @@ -48,11 +48,13 @@ static u32 find_nvram_size(void __iomem *end) return 0; } -/* Probe for NVRAM header */ -static int nvram_find_and_copy(void __iomem *iobase, u32 lim) +/** + * bcm47xx_nvram_find_and_copy - find NVRAM on flash mapping & copy it + */ +static int bcm47xx_nvram_find_and_copy(void __iomem *flash_start, size_t res_size) { struct nvram_header __iomem *header; - u32 off; + size_t flash_size; u32 size; if (nvram_len) { @@ -61,25 +63,25 @@ static int nvram_find_and_copy(void __iomem *iobase, u32 lim) } /* TODO: when nvram is on nand flash check for bad blocks first. */ - off = FLASH_MIN; - while (off <= lim) { + flash_size = FLASH_MIN; + while (flash_size <= res_size) { /* Windowed flash access */ - size = find_nvram_size(iobase + off); + size = find_nvram_size(flash_start + flash_size); if (size) { - header = (struct nvram_header *)(iobase + off - size); + header = (struct nvram_header *)(flash_start + flash_size - size); goto found; } - off <<= 1; + flash_size <<= 1; } /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */ - header = (struct nvram_header *)(iobase + 4096); + header = (struct nvram_header *)(flash_start + 4096); if (header->magic == NVRAM_MAGIC) { size = NVRAM_SPACE; goto found; } - header = (struct nvram_header *)(iobase + 1024); + header = (struct nvram_header *)(flash_start + 1024); if (header->magic == NVRAM_MAGIC) { size = NVRAM_SPACE; goto found; @@ -124,7 +126,7 @@ int bcm47xx_nvram_init_from_mem(u32 base, u32 lim) if (!iobase) return -ENOMEM; - err = nvram_find_and_copy(iobase, lim); + err = bcm47xx_nvram_find_and_copy(iobase, lim); iounmap(iobase); |