summaryrefslogtreecommitdiffstats
path: root/m29f400bt.c
diff options
context:
space:
mode:
authorCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>2009-05-16 21:22:56 +0000
committerCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>2009-05-16 21:22:56 +0000
commit5820f42ef209cfa0d4070fa9be96c9c91123a93f (patch)
treea505b6f813fc4f7601f77e7195e479dfddc73571 /m29f400bt.c
parent4059598a068f7694f2238a3811d85cbfa520a8d5 (diff)
downloadast2050-flashrom-5820f42ef209cfa0d4070fa9be96c9c91123a93f.zip
ast2050-flashrom-5820f42ef209cfa0d4070fa9be96c9c91123a93f.tar.gz
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>
Diffstat (limited to 'm29f400bt.c')
-rw-r--r--m29f400bt.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/m29f400bt.c b/m29f400bt.c
index cb55d76..7d63d58 100644
--- a/m29f400bt.c
+++ b/m29f400bt.c
@@ -20,7 +20,7 @@
#include "flash.h"
-void protect_m29f400bt(volatile uint8_t *bios)
+void protect_m29f400bt(chipaddr bios)
{
chip_writeb(0xAA, bios + 0xAAA);
chip_writeb(0x55, bios + 0x555);
@@ -29,8 +29,8 @@ void protect_m29f400bt(volatile uint8_t *bios)
usleep(200);
}
-void write_page_m29f400bt(volatile uint8_t *bios, uint8_t *src,
- volatile uint8_t *dst, int page_size)
+void write_page_m29f400bt(chipaddr bios, uint8_t *src,
+ chipaddr dst, int page_size)
{
int i;
@@ -41,12 +41,12 @@ void write_page_m29f400bt(volatile uint8_t *bios, uint8_t *src,
/* transfer data from source to destination */
chip_writeb(*src, dst);
- //*(volatile char *) (bios) = 0xF0;
+ //chip_writeb(0xF0, bios);
//usleep(5);
toggle_ready_jedec(dst);
printf
- ("Value in the flash at address %p = %#x, want %#x\n",
- (uint8_t *) (dst - bios), chip_readb(dst), *src);
+ ("Value in the flash at address 0x%lx = %#x, want %#x\n",
+ (dst - bios), chip_readb(dst), *src);
dst++;
src++;
}
@@ -54,7 +54,7 @@ void write_page_m29f400bt(volatile uint8_t *bios, uint8_t *src,
int probe_m29f400bt(struct flashchip *flash)
{
- volatile uint8_t *bios = flash->virtual_memory;
+ chipaddr bios = flash->virtual_memory;
uint8_t id1, id2;
chip_writeb(0xAA, bios + 0xAAA);
@@ -85,7 +85,7 @@ int probe_m29f400bt(struct flashchip *flash)
int erase_m29f400bt(struct flashchip *flash)
{
- volatile uint8_t *bios = flash->virtual_memory;
+ chipaddr bios = flash->virtual_memory;
chip_writeb(0xAA, bios + 0xAAA);
chip_writeb(0x55, bios + 0x555);
@@ -101,7 +101,7 @@ int erase_m29f400bt(struct flashchip *flash)
return 0;
}
-int block_erase_m29f400bt(volatile uint8_t *bios, volatile uint8_t *dst)
+int block_erase_m29f400bt(chipaddr bios, chipaddr dst)
{
chip_writeb(0xAA, bios + 0xAAA);
@@ -110,7 +110,7 @@ int block_erase_m29f400bt(volatile uint8_t *bios, volatile uint8_t *dst)
chip_writeb(0xAA, bios + 0xAAA);
chip_writeb(0x55, bios + 0x555);
- //*(volatile uint8_t *) (bios + 0xAAA) = 0x10;
+ //chip_writeb(0x10, bios + 0xAAA);
chip_writeb(0x30, dst);
myusec_delay(10);
@@ -124,7 +124,7 @@ int write_m29f400bt(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;
//erase_m29f400bt (flash);
printf("Programming page:\n ");
@@ -176,7 +176,7 @@ int write_m29f400bt(struct flashchip *flash, uint8_t *buf)
int write_coreboot_m29f400bt(struct flashchip *flash, uint8_t *buf)
{
- volatile uint8_t *bios = flash->virtual_memory;
+ chipaddr bios = flash->virtual_memory;
printf("Programming page:\n ");
/*********************************
OpenPOWER on IntegriCloud