Re-factor 'to_flash_offset()' into 'spi_flash.h'

Re-factor to_flash_offset() into 'spi_flash.h' header. Motivated by
Clang complaining that the function 'to_flash_offset' is unused.

Change-Id: Ic75fd2fb4edc5e434c199ebd10c7384d197e0c63
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7519
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/drivers/intel/fsp/fastboot_cache.c

@@ -31,15 +31,6 @@
 #include <lib.h> // hexdump
 #include "fsp_util.h"
 
-#ifndef CONFIG_VIRTUAL_ROM_SIZE
-#error "CONFIG_VIRTUAL_ROM_SIZE must be set."
-#endif
-
-/* convert a pointer to flash area into the offset inside the flash */
-static inline u32 to_flash_offset(void *p) {
-	return ((u32)p + CONFIG_VIRTUAL_ROM_SIZE);
-}
-
 static struct mrc_data_container *next_mrc_block(
 	struct mrc_data_container *mrc_cache)
 {
@@ -205,7 +196,7 @@ void update_mrc_cache(void *unused)
 		       "Need to erase the MRC cache region of %d bytes at %p\n",
 		       cache_size, cache_base);
 
-		flash->erase(flash, to_flash_offset(cache_base), cache_size);
+		flash->erase(flash, to_flash_offset(flash, cache_base), cache_size);
 
 		/* we will start at the beginning again */
 		cache = cache_base;
@@ -213,7 +204,7 @@ void update_mrc_cache(void *unused)
 	/*  4. write mrc data with flash->write() */
 	printk(BIOS_DEBUG, "Write MRC cache update to flash at %p\n",
 	       cache);
-	flash->write(flash, to_flash_offset(cache),
+	flash->write(flash, to_flash_offset(flash, cache),
 		     current->mrc_data_size + sizeof(*current), current);
 }
 

src/include/spi_flash.h

@@ -76,4 +76,15 @@ static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
 	return flash->erase(flash, offset, len);
 }
 
+#if !defined(__PRE_RAM__)
+/* convert a pointer to flash area into the offset inside the flash */
+static inline u32 to_flash_offset(struct spi_flash *flash, void *p) {
+#if defined(CONFIG_VIRTUAL_ROM_SIZE)
+	return ((u32)p + CONFIG_VIRTUAL_ROM_SIZE);
+#else
+	return ((u32)p + flash->size);
+#endif /* defined(CONFIG_VIRTUAL_ROM_SIZE) */
+}
+#endif /* !defined(__PRE_RAM__) */
+
 #endif /* _SPI_FLASH_H_ */

src/northbridge/intel/haswell/mrccache.c

@@ -33,11 +33,6 @@
 #include <vendorcode/google/chromeos/fmap.h>
 #endif
 
-/* convert a pointer to flash area into the offset inside the flash */
-static inline u32 to_flash_offset(struct spi_flash *flash, void *p) {
-	return ((u32)p + flash->size);
-}
-
 static struct mrc_data_container *next_mrc_block(
 	struct mrc_data_container *mrc_cache)
 {
@@ -228,7 +223,7 @@ BOOT_STATE_INIT_ENTRIES(mrc_cache_update) = {
 	BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_ENTRY,
 	                      update_mrc_cache, NULL),
 };
-#endif
+#endif /* !defined(__PRE_RAM__) */
 
 struct mrc_data_container *find_current_mrc_cache(void)
 {

src/northbridge/intel/sandybridge/mrccache.c

@@ -33,11 +33,6 @@
 #include <vendorcode/google/chromeos/fmap.h>
 #endif
 
-/* convert a pointer to flash area into the offset inside the flash */
-static inline u32 to_flash_offset(struct spi_flash *flash, void *p) {
-	return ((u32)p + flash->size);
-}
-
 static struct mrc_data_container *next_mrc_block(
 	struct mrc_data_container *mrc_cache)
 {
@@ -227,7 +222,7 @@ BOOT_STATE_INIT_ENTRIES(mrc_cache_update) = {
 	BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_ENTRY,
 	                      update_mrc_cache, NULL),
 };
-#endif
+#endif /* !defined(__PRE_RAM__) */
 
 struct mrc_data_container *find_current_mrc_cache(void)
 {

src/soc/intel/common/nvm.c

@@ -46,12 +46,6 @@ static int nvm_init(void)
 	return 0;
 }
 
-/* Convert memory mapped pointer to flash offset. */
-static inline uint32_t to_flash_offset(void *p)
-{
-	return CONFIG_ROM_SIZE + (uintptr_t)p;
-}
-
 int nvm_is_erased(const void *start, size_t size)
 {
 	const uint8_t *cur = start;
@@ -70,7 +64,7 @@ int nvm_erase(void *start, size_t size)
 {
 	if (nvm_init() < 0)
 		return -1;
-	return flash->erase(flash, to_flash_offset(start), size);
+	return flash->erase(flash, to_flash_offset(flash, start), size);
 }
 
 /* Write data to NVM. Returns 0 on success < 0 on error.  */
@@ -78,5 +72,5 @@ int nvm_write(void *start, const void *data, size_t size)
 {
 	if (nvm_init() < 0)
 		return -1;
-	return flash->write(flash, to_flash_offset(start), size, data);
+	return flash->write(flash, to_flash_offset(flash, start), size, data);
 }

src/soc/intel/fsp_baytrail/nvm.c

@@ -47,15 +47,6 @@ static int nvm_init(void)
 	return 0;
 }
 
-/* Convert memory mapped pointer to flash offset. */
-static inline uint32_t to_flash_offset(void *p)
-{
-#ifndef CONFIG_ROM_SIZE
-#error CONFIG_ROM_SIZE must be set.
-#endif
-	return CONFIG_ROM_SIZE + (uintptr_t)p;
-}
-
 int nvm_is_erased(const void *start, size_t size)
 {
 	const uint8_t *cur = start;
@@ -74,7 +65,7 @@ int nvm_erase(void *start, size_t size)
 {
 	if (nvm_init() < 0)
 		return -1;
-	flash->erase(flash, to_flash_offset(start), size);
+	flash->erase(flash, to_flash_offset(flash, start), size);
 	return 0;
 }
 
@@ -83,6 +74,6 @@ int nvm_write(void *start, const void *data, size_t size)
 {
 	if (nvm_init() < 0)
 		return -1;
-	flash->write(flash, to_flash_offset(start), size, data);
+	flash->write(flash, to_flash_offset(flash, start), size, data);
 	return 0;
 }