Kernel address space isolation and make the kernel heap global to all processes.

[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 8dfb23bf32a176e33a935b3bd455c834360fe189..8330bc263f1bb37b88bf56ff05b25ef7ecbad6d9 100644 (file)
--- a/lunaix-os/kernel/asm/x86/interrupts.c
+++ b/lunaix-os/kernel/asm/x86/interrupts.c
@@ -1,42 +1,83 @@
 #include <arch/x86/interrupts.h>
 #include <arch/x86/interrupts.h>

+#include <hal/apic.h>
+#include <hal/cpu.h>
+#include <lunaix/syslog.h>

 #include <lunaix/tty/tty.h>
 #include <lunaix/tty/tty.h>

-#include <libc/stdio.h>
-
-void panic_msg(const char* msg) {
-    tty_set_theme(VGA_COLOR_WHITE, VGA_COLOR_RED);
-    tty_clear_line(10);
-    tty_clear_line(11);
-    tty_clear_line(12);
-    tty_set_cpos(0, 11);
-    printf("  %s", msg);
+#include <lunaix/process.h>
+#include <lunaix/sched.h>
+#include <lunaix/mm/page.h>
+
+LOG_MODULE("intr")
+
+static int_subscriber subscribers[256];
+
+static int_subscriber fallback = (int_subscriber) 0;
+
+void
+intr_subscribe(const uint8_t vector, int_subscriber subscriber) {
+    subscribers[vector] = subscriber;
+}
+
+void
+intr_unsubscribe(const uint8_t vector, int_subscriber subscriber) {
+    if (subscribers[vector] == subscriber) {
+        subscribers[vector] = (int_subscriber) 0;
+    }

 }
 
 }
 

-void panic (const char* msg, isr_param* param) {
-    char buf[1024];
-    sprintf(buf, "INT %u: (%x) [%p: %p] %s", param->vector, param->err_code, param->cs, param->eip, msg);
-    panic_msg(buf);
-    while(1);
+void
+intr_set_fallback_handler(int_subscriber subscribers) {
+    fallback = subscribers;

 }
 
 }
 

-void 
-interrupt_handler(isr_param* param) {
-    switch (param->vector)
-    {
-        case 0:
-            panic("Division by 0", param);
-            break;  // never reach
-        case FAULT_GENERAL_PROTECTION:
-            panic("General Protection", param);
-            break;  // never reach
-        case FAULT_PAGE_FAULT:
-            panic("Page Fault", param);
-            break;  // never reach
-        case LUNAIX_SYS_PANIC:
-            panic_msg((char*)(param->registers.edi));
-            while(1);
-            break;  // never reach
-        default:
-            panic("Unknown Interrupt", param);
-            break;  // never reach
+extern x86_page_table* __kernel_ptd;
+
+void
+intr_handler(isr_param* param)
+{
+    // if (param->vector == LUNAIX_SYS_CALL) {
+    //     kprintf(KDEBUG "%p", param->registers.esp);
+    // }
+    __current->intr_ctx = *param;
+
+    cpu_lcr3(__kernel_ptd);
+
+    isr_param *lparam = &__current->intr_ctx;
+    
+    if (lparam->vector <= 255) {
+        int_subscriber subscriber = subscribers[lparam->vector];
+        if (subscriber) {
+            subscriber(lparam);
+            goto done;
+        }

     }
     }

+
+    if (fallback) {
+        fallback(lparam);
+        goto done;
+    }
+    
+    kprint_panic("INT %u: (%x) [%p: %p] Unknown",
+            lparam->vector,
+            lparam->err_code,
+            lparam->cs,
+            lparam->eip);
+
+done:
+
+    // if (__current->state != PROC_RUNNING) {
+    //     schedule();
+    // }
+
+    // for all external interrupts except the spurious interrupt
+    //  this is required by Intel Manual Vol.3A, section 10.8.1 & 10.8.5
+    if (lparam->vector >= EX_INTERRUPT_BEGIN && lparam->vector != APIC_SPIV_IV) {
+        apic_done_servicing();
+    }
+
+    cpu_lcr3(__current->page_table);
+
+    *param = __current->intr_ctx;
+
+    return;

 }
\ No newline at end of file
 }
\ No newline at end of file