factor out register mapping code (trivial)

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


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2691 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 17 insertions, 0 deletions

diff --git a/util/flashrom/flashrom.c b/util/flashrom/flashrom.c
index a05def76b3..8ada918a68 100644
--- a/util/flashrom/flashrom.c
+++ b/util/flashrom/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;