From 4805e62467cb33ef9747b4024e60ca9f67ac63d5 Mon Sep 17 00:00:00 2001
From: Stefan Lankes <slankes@eonerc.rwth-aachen.de>
Date: Thu, 20 Aug 2015 14:15:52 +0200
Subject: [PATCH] use generic numbers for the IPIs (shutdown, TLB shootdown)

---
 hermit/arch/x86/kernel/apic.c    |  4 ++--
 hermit/arch/x86/kernel/entry.asm | 12 ++++++------
 hermit/arch/x86/kernel/irq.c     | 10 +++++++---
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/hermit/arch/x86/kernel/apic.c b/hermit/arch/x86/kernel/apic.c
index 63276083d..d775e3f96 100644
--- a/hermit/arch/x86/kernel/apic.c
+++ b/hermit/arch/x86/kernel/apic.c
@@ -714,9 +714,9 @@ int apic_init(void)
 	// set APIC error handler
 	irq_install_handler(126, apic_err_handler);
 #if MAX_CORES > 1
-	irq_install_handler(124, apic_tlb_handler);
+	irq_install_handler(80+32, apic_tlb_handler);
 #endif
-	irq_install_handler(122, apic_shutdown);
+	irq_install_handler(81+32, apic_shutdown);
 	kprintf("Boot processor %u (ID %u)\n", boot_processor, apic_processors[boot_processor]->id);
 	online[boot_processor] = 1;
 
diff --git a/hermit/arch/x86/kernel/entry.asm b/hermit/arch/x86/kernel/entry.asm
index 417c9d737..4662f88a6 100644
--- a/hermit/arch/x86/kernel/entry.asm
+++ b/hermit/arch/x86/kernel/entry.asm
@@ -289,12 +289,12 @@ isrstub_pseudo_error 9
 %assign i i+1
 %endrep
 
-global apic_shutdown
-align 16
-apic_shutdown:
-    push byte 0 ; pseudo error code
-    push byte 122
-    jmp common_stub
+; Create entries for the interrupts 80 to 81
+%assign i 80
+%rep 2
+  irqstub i
+%assign i i+1
+%endrep
 
 global apic_timer
 align 16
diff --git a/hermit/arch/x86/kernel/irq.c b/hermit/arch/x86/kernel/irq.c
index 9fa6058fe..fbab3f5dd 100644
--- a/hermit/arch/x86/kernel/irq.c
+++ b/hermit/arch/x86/kernel/irq.c
@@ -71,7 +71,8 @@ extern void irq20(void);
 extern void irq21(void);
 extern void irq22(void);
 extern void irq23(void);
-extern void apic_shutdown(void);
+extern void irq80(void);
+extern void irq81(void);
 extern void apic_timer(void);
 extern void apic_lint0(void);
 extern void apic_lint1(void);
@@ -211,9 +212,12 @@ static int irq_install(void)
 	idt_set_gate(55, (size_t)irq23, KERNEL_CODE_SELECTOR,
 		IDT_FLAG_PRESENT|IDT_FLAG_RING0|IDT_FLAG_32BIT|IDT_FLAG_INTTRAP);
 
+	idt_set_gate(112, (size_t)irq80, KERNEL_CODE_SELECTOR,
+		IDT_FLAG_PRESENT|IDT_FLAG_RING0|IDT_FLAG_32BIT|IDT_FLAG_INTTRAP);
+	idt_set_gate(113, (size_t)irq81, KERNEL_CODE_SELECTOR,
+		IDT_FLAG_PRESENT|IDT_FLAG_RING0|IDT_FLAG_32BIT|IDT_FLAG_INTTRAP);
+
 	// add APIC interrupt handler
-	idt_set_gate(122, (size_t)apic_shutdown, KERNEL_CODE_SELECTOR,
-                IDT_FLAG_PRESENT|IDT_FLAG_RING0|IDT_FLAG_32BIT|IDT_FLAG_INTTRAP);
 	idt_set_gate(123, (size_t)apic_timer, KERNEL_CODE_SELECTOR,
 		IDT_FLAG_PRESENT|IDT_FLAG_RING0|IDT_FLAG_32BIT|IDT_FLAG_INTTRAP);
 	idt_set_gate(124, (size_t)apic_lint0, KERNEL_CODE_SELECTOR,