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| author | Jake Mannens <jake72360@gmail.com> | 2018-07-11 05:38:01 +1000 |
|---|---|---|
| committer | Jake Mannens <jake72360@gmail.com> | 2018-07-11 05:38:01 +1000 |
| commit | 59cac783f5ba12a47308b05b87d5cfa769473a49 (patch) | |
| tree | 35e14bb57fa7fdbaf1573f409c3289e1ddb9c0c1 /kernel/asm.s | |
| parent | 99d16e98e04c73e108160d7d70244bafdb33b6fc (diff) | |
Modified the tick_handler interrupt routine in timer.s so that it no
longer calls reschedule() directly. It now calls sched_tick() so that
the scheduler can make it's own decisions relating to handling the timer
interrupt.
The reschedule() function now *actually* implements a basic round-robin
scheduling algorithm that iterates through the list of tasks. This is
still a temporary algorithm but at least it now includes *all* runnable
processes instead of switching back and forth between process 1 and 2.
Diffstat (limited to 'kernel/asm.s')
| -rw-r--r-- | kernel/asm.s | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/asm.s b/kernel/asm.s index 0bf9067..6d35334 100644 --- a/kernel/asm.s +++ b/kernel/asm.s @@ -3,6 +3,7 @@ global switch_to global set_tss extern cstate extern ctask +extern ctaskn extern gdt extern save_state @@ -27,9 +28,11 @@ switch_to: ltr ax ; copy the saved state into the previous TSS call save_state - ; update ctask + ; update ctask and ctaskn mov ebx, [ebp+12] mov [ctask], ebx + mov ebx, [ebp+8] + mov [ctaskn], ebx ; calculate the task segment index and jump to it mov ebx, [ebp+8] add ebx, 5 |