diff options
Diffstat (limited to 'asm/pit.s')
| -rw-r--r-- | asm/pit.s | 41 |
1 files changed, 7 insertions, 34 deletions
@@ -1,16 +1,16 @@ -.global pit_init -.global pit_interrupt_handler -.global pit_get_ticks +.global asm_pit_init +.global asm_pit_tick +.global asm_pit_get_ticks ticks: .int 0 -pit_get_ticks: +asm_pit_get_ticks: mov (ticks),%eax ret -pit_interrupt_handler: +asm_pit_tick: push %eax // persist @@ -18,38 +18,11 @@ pit_interrupt_handler: mov $ticks, %eax incl (%eax) - // ACK IRQ - //mov $0x20,%al - //out %al,$0x20 - pop %eax // load original - /////// - - /* - pusha //Push all standard registers - push %ds //Push data segment - push %es //etc... - push %fs - push %gs - - mov %esp, %eax // remember current %esp - movl $stack_top, %esp // switch to our small scheduler stack - - push %eax // set original %esp as param and... - call task_switch_next // call scheduler - mov %eax, %esp // use %esp we got from scheduler - - pop %gs - pop %fs - pop %es - pop %ds - popa - - iret // pops the return instruction pointer, return code segment selector, and EFLAGS image from the stack -*/ ret -pit_init: + +asm_pit_init: // configure ticking 25 times a second // 1193180 / 25 = 47727.2 |