Factor out register mapping code

Corresponding to flashrom svn r113 and coreboot v2 svn r2691.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/flashrom.c b/flashrom.c
index a05def7..8ada918 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -99,6 +99,23 @@ struct pci_dev *pci_card_find(uint16_t vendor, uint16_t device,
 	return NULL;
 }
 
+int map_flash_registers(struct flashchip *flash)
+{
+	volatile uint8_t *registers;
+	size_t size = flash->total_size * 1024;
+
+	registers = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
+		    fd_mem, (off_t) (0xFFFFFFFF - 0x400000 - size + 1));
+
+	if (registers == MAP_FAILED) {
+		perror("Can't mmap registers using " MEM_DEV);
+		exit(1);
+	}
+	flash->virtual_registers = registers;
+
+	return 0;
+}
+
 struct flashchip *probe_flash(struct flashchip *flash)
 {
 	volatile uint8_t *bios;