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smp: move the ticking from C to Assembly

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This commit is contained in:
Edgaru089 2021-11-08 12:56:33 +08:00
parent c4eeb5e481
commit a8ed090450
2 changed files with 25 additions and 8 deletions
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8
smp/kthread_switch.c
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@ -27,14 +27,6 @@ static void printTree(tree_Node *root, int level, __tree_ConnectType type) {
SYSV_ABI uintptr_t __smp_Switch() {
// the calling function smp_IntSwitch already CLI-ed for us
// TODO ticker and switch should be 2 functions!
if (!__smp_PauseTicker) {
__smp_Now++;
if (__smp_Now % 8)
return 0;
} else
__smp_PauseTicker = false;
//io_Printf("__smp_Switch: Tick: %d, switching\n", __smp_Now);
__smp_Thread *t = __smp_Current[0];

25
smp/kthread_switch_asm.S
View File

@ -1,6 +1,8 @@
format elf64
extrn __smp_Switch
extrn __smp_PauseTicker
extrn __smp_Now
public __smp_IntSwitch_LastState
public __smp_IntSwitch
public __smp_Switch_Idle
@ -33,6 +35,29 @@ __smp_IntSwitch:
cli
mov [__smp_IntSwitch_LastState], rax
; if (!__smp_PauseTicker) {
; __smp_Now++;
; if (__smp_Now % 8)
; return 0;
; } else
; __smp_PauseTicker = false;
mov al, [__smp_PauseTicker]
test al, al
jnz .noticker
mov rax, [__smp_Now]
inc rax
mov [__smp_Now], rax
test rax, 0x7
jz .realcall
mov rax, [__smp_IntSwitch_LastState]
iret
.noticker:
mov byte [__smp_PauseTicker], 0
.realcall:
mov [__smp_IntSwitch_LastState+8], rbx
mov [__smp_IntSwitch_LastState+16], rcx
mov [__smp_IntSwitch_LastState+24], rdx