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-rw-r--r--src/drivers/elog/elog.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/src/drivers/elog/elog.c b/src/drivers/elog/elog.c
index cff78867ce..de349281d6 100644
--- a/src/drivers/elog/elog.c
+++ b/src/drivers/elog/elog.c
@@ -72,14 +72,33 @@ static u16 event_count;
static int elog_initialized;
static struct spi_flash *elog_spi;
+
+static inline u32 get_rom_size(void)
+{
+ u32 rom_size;
+
+ /* Assume the used space of the ROM image starts from 0. The
+ * physical size of the device may not be completely used. */
+ rom_size = elog_spi->size;
+ if (rom_size > CONFIG_ROM_SIZE)
+ rom_size = CONFIG_ROM_SIZE;
+
+ return rom_size;
+}
+
/*
* Convert a memory mapped flash address into a flash offset
*/
static inline u32 elog_flash_address_to_offset(u8 *address)
{
+ u32 rom_size;
+
if (!elog_spi)
return 0;
- return (u32)address - ((u32)~0UL - elog_spi->size + 1);
+
+ rom_size = get_rom_size();
+
+ return (u32)address - ((u32)~0UL - rom_size + 1);
}
/*
@@ -87,9 +106,14 @@ static inline u32 elog_flash_address_to_offset(u8 *address)
*/
static inline u8* elog_flash_offset_to_address(u32 offset)
{
+ u32 rom_size;
+
if (!elog_spi)
return NULL;
- return (u8*)((u32)~0UL - elog_spi->size + 1 + offset);
+
+ rom_size = get_rom_size();
+
+ return (u8*)((u32)~0UL - rom_size + 1 + offset);
}
/*