Introduce a type "chipaddr" to abstract the offsets within flash regions

Use chipaddr instead of volatile uint8_t * because when we access chips
in external flashers, they are not accessed via pointers at all.

Benefits: This allows us to differentiate between volatile machine
memory accesses and flash chip accesses. It also enforces usage
of chip_{read,write}[bwl] to access flash chips, so nobody will
unintentionally use pointers to access chips anymore. Some unneeded
casts are removed as well. Grepping for chip operations and machine
memory operations doesn't yield any false positives anymore.

Compile tested on 32 bit and 64 bit Linux.

Corresponding to flashrom svn r519.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

1 files changed, 7 insertions, 7 deletions

diff --git a/82802ab.c b/82802ab.c
index 0d071d4..b2e8a49 100644
--- a/82802ab.c
+++ b/82802ab.c
@@ -45,7 +45,7 @@ void print_82802ab_status(uint8_t status)
 
 int probe_82802ab(struct flashchip *flash)
 {
-	volatile uint8_t *bios = flash->virtual_memory;
+	chipaddr bios = flash->virtual_memory;
 	uint8_t id1, id2;
 
 #if 0
@@ -79,7 +79,7 @@ int probe_82802ab(struct flashchip *flash)
 	return 1;
 }
 
-uint8_t wait_82802ab(volatile uint8_t *bios)
+uint8_t wait_82802ab(chipaddr bios)
 {
 	uint8_t status;
 	uint8_t id1, id2;
@@ -109,8 +109,8 @@ uint8_t wait_82802ab(volatile uint8_t *bios)
 
 int erase_82802ab_block(struct flashchip *flash, int offset)
 {
-	volatile uint8_t *bios = flash->virtual_memory + offset;
-	volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
+	chipaddr bios = flash->virtual_memory + offset;
+	chipaddr wrprotect = flash->virtual_registers + offset + 2;
 	int j;
 	uint8_t status;
 
@@ -155,8 +155,8 @@ int erase_82802ab(struct flashchip *flash)
 	return 0;
 }
 
-void write_page_82802ab(volatile uint8_t *bios, uint8_t *src,
-			volatile uint8_t *dst, int page_size)
+void write_page_82802ab(chipaddr bios, uint8_t *src,
+			chipaddr dst, int page_size)
 {
 	int i;
 
@@ -173,7 +173,7 @@ int write_82802ab(struct flashchip *flash, uint8_t *buf)
 	int i;
 	int total_size = flash->total_size * 1024;
 	int page_size = flash->page_size;
-	volatile uint8_t *bios = flash->virtual_memory;
+	chipaddr bios = flash->virtual_memory;
 
 	printf("Programming page: \n");
 	for (i = 0; i < total_size / page_size; i++) {