From 8e3411139b27a3421e9ac75c13f14f99f6dd3137 Mon Sep 17 00:00:00 2001 From: Miguel Date: Sun, 2 Sep 2018 00:08:42 +0200 Subject: syscalls --- asm/pit.s | 41 +++++++---------------------------------- 1 file changed, 7 insertions(+), 34 deletions(-) (limited to 'asm/pit.s') diff --git a/asm/pit.s b/asm/pit.s index 34b69ec..8e16d0b 100644 --- a/asm/pit.s +++ b/asm/pit.s @@ -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 -- cgit v1.2.3