# define RADEON_BUS_READ_BURST (1 << 30)
#define RADEON_BUS_CNTL1 0x0034
# define RADEON_BUS_WAIT_ON_LOCK_EN (1 << 4)
+#define RV370_BUS_CNTL 0x004c
+# define RV370_BUS_BIOS_DIS_ROM (1 << 2)
/* rv370/rv380, rv410, r423/r430/r480, r5xx */
#define RADEON_MSI_REARM_EN 0x0160
# define RV370_MSI_REARM_EN (1 << 0)