feat: No more kernel page table switching upon interrupt.

[lunaix-os.git] / lunaix-os / kernel / asm / x86 / interrupts.c

diff --git a/lunaix-os/kernel/asm/x86/interrupts.c b/lunaix-os/kernel/asm/x86/interrupts.c
index 869569f81928e31e3270b51a1166b22e17c426f8..55d7e9b9a1e1002773b7d4ce8303c11bc2c24b1c 100644 (file)
--- a/lunaix-os/kernel/asm/x86/interrupts.c
+++ b/lunaix-os/kernel/asm/x86/interrupts.c
@@ -3,8 +3,14 @@
 #include <hal/cpu.h>
 #include <lunaix/syslog.h>
 #include <lunaix/tty/tty.h>
+#include <lunaix/process.h>
+#include <lunaix/sched.h>
+#include <lunaix/mm/page.h>
+#include <lunaix/mm/vmm.h>
 
-int_subscriber subscribers[256];
+LOG_MODULE("intr")
+
+static int_subscriber subscribers[256];
 
 static int_subscriber fallback = (int_subscriber) 0;
 
@@ -25,11 +31,23 @@ intr_set_fallback_handler(int_subscriber subscribers) {
     fallback = subscribers;
 }
 
+extern x86_page_table* __kernel_ptd;
+
 void
 intr_handler(isr_param* param)
 {
-    if (param->vector <= 255) {
-        int_subscriber subscriber = subscribers[param->vector];
+    __current->intr_ctx = *param;
+    
+#ifdef USE_KERNEL_PT
+    cpu_lcr3(__kernel_ptd);
+
+    vmm_mount_pd(PD_MOUNT_1, __current->page_table);
+#endif
+
+    isr_param *lparam = &__current->intr_ctx;
+    
+    if (lparam->vector <= 255) {
+        int_subscriber subscriber = subscribers[lparam->vector];
         if (subscriber) {
             subscriber(param);
             goto done;
@@ -37,21 +55,25 @@ intr_handler(isr_param* param)
     }
 
     if (fallback) {
-        fallback(param);
+        fallback(lparam);
         goto done;
     }
     
     kprint_panic("INT %u: (%x) [%p: %p] Unknown",
-            param->vector,
-            param->err_code,
-            param->cs,
-            param->eip);
+            lparam->vector,
+            lparam->err_code,
+            lparam->cs,
+            lparam->eip);
 
 done:
     // for all external interrupts except the spurious interrupt
     //  this is required by Intel Manual Vol.3A, section 10.8.1 & 10.8.5
-    if (param->vector >= EX_INTERRUPT_BEGIN && param->vector != APIC_SPIV_IV) {
+    if (lparam->vector >= EX_INTERRUPT_BEGIN && lparam->vector != APIC_SPIV_IV) {
         apic_done_servicing();
     }
+
+#ifdef USE_KERNEL_PT
+    cpu_lcr3(__current->page_table);
+#endif
     return;
 }
\ No newline at end of file