diff options
Diffstat (limited to 'sys/amd64/isa/atpic.c')
| -rw-r--r-- | sys/amd64/isa/atpic.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sys/amd64/isa/atpic.c b/sys/amd64/isa/atpic.c index 09593b5..23979ea 100644 --- a/sys/amd64/isa/atpic.c +++ b/sys/amd64/isa/atpic.c @@ -62,15 +62,23 @@ __FBSDID("$FreeBSD$"); #define MASTER 0 #define SLAVE 1 +/* + * Determine the base master and slave modes not including auto EOI support. + * All machines that FreeBSD supports use 8086 mode. + */ +#define BASE_MASTER_MODE ICW4_8086 +#define BASE_SLAVE_MODE ICW4_8086 + +/* Enable automatic EOI if requested. */ #ifdef AUTO_EOI_1 -#define MASTER_MODE (ICW4_8086 | ICW4_AEOI) +#define MASTER_MODE (BASE_MASTER_MODE | ICW4_AEOI) #else -#define MASTER_MODE ICW4_8086 +#define MASTER_MODE BASE_MASTER_MODE #endif #ifdef AUTO_EOI_2 -#define SLAVE_MODE (ICW4_8086 | ICW4_AEOI) +#define SLAVE_MODE (BASE_SLAVE_MODE | ICW4_AEOI) #else -#define SLAVE_MODE ICW4_8086 +#define SLAVE_MODE BASE_SLAVE_MODE #endif static void atpic_init(void *dummy); |
