diff options
| -rw-r--r-- | arch/mips/bcm47xx/nvram.c | 60 | ||||
| -rw-r--r-- | include/linux/bcm47xx_nvram.h | 15 |
2 files changed, 60 insertions, 15 deletions
diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c index 95d028c..2ed762e 100644 --- a/arch/mips/bcm47xx/nvram.c +++ b/arch/mips/bcm47xx/nvram.c @@ -94,17 +94,22 @@ static int nvram_find_and_copy(void __iomem *iobase, u32 lim) return -ENXIO; found: - if (header->len > size) - pr_err("The nvram size accoridng to the header seems to be bigger than the partition on flash\n"); - if (header->len > NVRAM_SPACE) - pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", - header->len, NVRAM_SPACE - 1); - src = (u32 *)header; dst = (u32 *)nvram_buf; for (i = 0; i < sizeof(struct nvram_header); i += 4) *dst++ = __raw_readl(src++); - for (; i < header->len && i < NVRAM_SPACE && i < size; i += 4) + header = (struct nvram_header *)nvram_buf; + if (header->len > size) { + pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n"); + header->len = size; + } + if (header->len >= NVRAM_SPACE) { + pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", + header->len, NVRAM_SPACE - 1); + header->len = NVRAM_SPACE - 1; + } + /* proceed reading data after header */ + for (; i < header->len; i += 4) *dst++ = readl(src++); nvram_buf[NVRAM_SPACE - 1] = '\0'; @@ -139,6 +144,7 @@ static int nvram_init(void) #ifdef CONFIG_MTD struct mtd_info *mtd; struct nvram_header header; + struct nvram_header *pheader; size_t bytes_read; int err; @@ -147,20 +153,21 @@ static int nvram_init(void) return -ENODEV; err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header); - if (!err && header.magic == NVRAM_MAGIC) { - u8 *dst = (uint8_t *)nvram_buf; - size_t len = header.len; - - if (len >= NVRAM_SPACE) { - len = NVRAM_SPACE - 1; + if (!err && header.magic == NVRAM_MAGIC && + header.len > sizeof(header)) { + if (header.len >= NVRAM_SPACE) { pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", - header.len, len); + header.len, NVRAM_SPACE); + header.len = NVRAM_SPACE - 1; } - err = mtd_read(mtd, 0, len, &bytes_read, dst); + err = mtd_read(mtd, 0, header.len, &bytes_read, + (u8 *)nvram_buf); if (err) return err; + pheader = (struct nvram_header *)nvram_buf; + pheader->len = header.len; return 0; } #endif @@ -219,3 +226,26 @@ int bcm47xx_nvram_gpio_pin(const char *name) return -ENOENT; } EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin); + +char *bcm47xx_nvram_get_contents(size_t *nvram_size) +{ + int err; + char *nvram; + struct nvram_header *header; + + if (!nvram_buf[0]) { + err = nvram_init(); + if (err) + return NULL; + } + + header = (struct nvram_header *)nvram_buf; + *nvram_size = header->len - sizeof(struct nvram_header); + nvram = vmalloc(*nvram_size); + if (!nvram) + return NULL; + memcpy(nvram, &nvram_buf[sizeof(struct nvram_header)], *nvram_size); + + return nvram; +} +EXPORT_SYMBOL(bcm47xx_nvram_get_contents); diff --git a/include/linux/bcm47xx_nvram.h b/include/linux/bcm47xx_nvram.h index b12b07e..c73927c 100644 --- a/include/linux/bcm47xx_nvram.h +++ b/include/linux/bcm47xx_nvram.h @@ -10,11 +10,17 @@ #include <linux/types.h> #include <linux/kernel.h> +#include <linux/vmalloc.h> #ifdef CONFIG_BCM47XX int bcm47xx_nvram_init_from_mem(u32 base, u32 lim); int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len); int bcm47xx_nvram_gpio_pin(const char *name); +char *bcm47xx_nvram_get_contents(size_t *val_len); +static inline void bcm47xx_nvram_release_contents(char *nvram) +{ + vfree(nvram); +}; #else static inline int bcm47xx_nvram_init_from_mem(u32 base, u32 lim) { @@ -29,6 +35,15 @@ static inline int bcm47xx_nvram_gpio_pin(const char *name) { return -ENOTSUPP; }; + +static inline char *bcm47xx_nvram_get_contents(size_t *val_len) +{ + return NULL; +}; + +static inline void bcm47xx_nvram_release_contents(char *nvram) +{ +}; #endif #endif /* __BCM47XX_NVRAM_H */ |
