diff options
Diffstat (limited to 'src/kernel/arch/i386/driver/ps2.c')
| -rw-r--r-- | src/kernel/arch/i386/driver/ps2.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/src/kernel/arch/i386/driver/ps2.c b/src/kernel/arch/i386/driver/ps2.c index 697bd34..5121b9e 100644 --- a/src/kernel/arch/i386/driver/ps2.c +++ b/src/kernel/arch/i386/driver/ps2.c @@ -7,17 +7,16 @@ static volatile uint8_t backlog[BACKLOG_CAPACITY] = {}; static volatile size_t backlog_size = 0; +bool ps2_ready(void) { + return backlog_size > 0; +} + void ps2_recv(uint8_t s) { if (backlog_size >= BACKLOG_CAPACITY) return; backlog[backlog_size++] = s; } size_t ps2_read(uint8_t *buf, size_t len) { - irq_interrupt_flag(true); - while (backlog_size == 0) - asm("hlt" ::: "memory"); - irq_interrupt_flag(false); - if (backlog_size <= len) len = backlog_size; backlog_size -= len; /* guaranteed to never be < 0 */ |