Basic framework for getting interrupts to go, but alas nothing yet...

2016-03-13 13:17:08 -04:00 · 2016-03-13 13:17:08 -04:00 · 46d18b97d5
commit 46d18b97d5
parent c9c64b154a
3 changed files with 143 additions and 0 deletions
--- a/src/isr.S
+++ b/src/isr.S
@ -0,0 +1,69 @@
+# isr.s
+# Eryn Wells <eryn@erynwells.me>
+
+# Interrupt service routine. See also: Interrupts.cc.
+
+.section .text
+.global unhandledInterrupt
+.global handleDEException, handleGPException
+.global handleHardwareInterrupt0, handleHardwareInterrupt1
+
+#define SaveContext \
+    pushal; \
+    cld;
+
+#define RestoreContext \
+    popal; \
+    iret
+
+#define RestoreContextAndHalt \
+    popal; \
+    cli; \
+    hlt
+
+// Generic handler
+unhandledInterrupt:
+    SaveContext
+    call doUnhandledInterrupt
+    RestoreContextAndHalt
+
+// Divide error
+handleDEException:
+    SaveContext
+    pushl $0
+    call dispatchExceptionHandler
+    add $4, %esp
+    RestoreContextAndHalt
+
+// Double fault
+handleDFException:
+    SaveContext
+    pushl $0x08
+    call dispatchExceptionHandler
+    add $4, %esp
+    RestoreContextAndHalt
+
+// General Protection fault
+handleGPException:
+    SaveContext
+    pushl $0x0D
+    call dispatchExceptionHandler
+    add $4, %esp
+    RestoreContextAndHalt
+        
+/*
+ * Hardware Interrupts
+ */
+
+handleHardwareInterrupt0:
+    SaveContext
+    call handleTimerInterrupt
+    RestoreContext
+
+handleHardwareInterrupt1:
+    SaveContext
+    call handleKeyboardInterrupt
+    RestoreContext
+
+#undef RestoreContext
+#undef SaveContext