[sir_richard] 45236: [HAL]: Implement HalEnableSystemInterrupt and HalDisableSystemInterrupt in C instead of ASM.

Author: sir_richard
Date: Mon Jan 25 00:21:36 2010
New Revision: 45236

URL: http://svn.reactos.org/svn/reactos?rev=45236&view=rev
Log:
[HAL]: Implement HalEnableSystemInterrupt and HalDisableSystemInterrupt in C instead of
ASM.

Modified:
    trunk/reactos/hal/halx86/generic/irq.S
    trunk/reactos/hal/halx86/generic/pic.c

Modified: trunk/reactos/hal/halx86/generic/irq.S
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/hal/halx86/generic/irq.S?r…
==============================================================================
--- trunk/reactos/hal/halx86/generic/irq.S [iso-8859-1] (original)
+++ trunk/reactos/hal/halx86/generic/irq.S [iso-8859-1] Mon Jan 25 00:21:36 2010
@@ -210,126 +210,6 @@
     ret
 .endfunc
 
-.globl _HalDisableSystemInterrupt@8
-.func HalDisableSystemInterrupt@8
-_HalDisableSystemInterrupt@8:
-
-    /* Convert to vector */
-    movzx ecx, byte ptr [esp+4]
-    sub ecx, PRIMARY_VECTOR_BASE
-
-    /* Disable interrupts and set the new IDR */
-    mov edx, 1
-    shl edx, cl
-    cli
-    or PCR[KPCR_IDR], edx
-
-    /* Get the current mask */
-    xor eax, eax
-    in al, 0xA1
-    shl eax, 8
-    in al, 0x21
-
-    /* Mask off the interrupt and write the new mask */
-    or eax, edx
-    out 0x21, al
-    shr eax, 8
-    out 0xA1, al
-
-    /* Return with interrupts enabled */
-    in al, 0xA1
-    sti
-    ret 8
-.endfunc
-
-.globl _HalEnableSystemInterrupt@12
-.func HalEnableSystemInterrupt@12
-_HalEnableSystemInterrupt@12:
-
-    /* Get the vector and validate it */
-    movzx ecx, byte ptr [esp+4]
-    sub ecx, PRIMARY_VECTOR_BASE
-    jb Invalid
-    cmp ecx, CLOCK2_LEVEL
-    jnb Invalid
-
-#if 0
-    /* Is PCI IRQ Routing enabled? */
-    cmp byte ptr _HalpIrqMiniportInitialized, 0
-    jz NoMiniport
-
-    /* UNHANDLED */
-    UNHANDLED_PATH
-
-NoMiniport:
-    /* Check if this is an EISA IRQ */
-    bt _HalpEisaIrqIgnore, ecx
-    jb IgnoredIrq
-
-    /* Clear the EISA Edge/Level Control Register */
-    btr _HalpEisaELCR, ecx
-
-    /* Get the interrupt type */
-    mov al, [esp+12]
-    cmp al, 0
-    jnz Latched
-
-    /* Check the register again */
-    bt _HalpEisaELCR, ecx
-    jb Dismiss
-
-    /* Check if the miniport is active */
-    cmp byte ptr _HalpIrqMiniportInitialized, 0
-    jz Dismiss
-
-    /* Update the EISA Edge/Level Control Register */
-    bts _HalpEisaELCR, ecx
-
-Dismiss:
-    /* Use the level hardware interrupt handler */
-    mov dword ptr SWInterruptHandlerTableHardware[ecx*4], offset
_HalpHardwareInterruptLevel
-    mov edx, HalpSpecialDismissLevelTable[ecx*4]
-    mov HalpSpecialDismissTable[ecx*4], edx
-
-Latched:
-    /* Is PCI IRQ Routing enabled? */
-    cmp byte ptr _HalpIrqMiniportInitialized, 0
-    jz IgnoredIrq
-
-    /* UNHANDLED */
-    UNHANDLED_PATH
-#endif
-IgnoredIrq:
-    /* Calculate the new IDR */
-    mov eax, 1
-    shl eax, cl
-    not eax
-    cli
-    and PCR[KPCR_IDR], eax
-
-    /* Get the current IRQL and mask the IRQs in the PIC */
-    mov eax, PCR[KPCR_IRQL]
-    mov eax, KiI8259MaskTable[eax*4]
-    or eax, PCR[KPCR_IDR]
-    out 0x21, al
-    shr eax, 8
-    out 0xA1, al
-
-    /* Enable interrupts and return TRUE */
-    sti
-    mov eax, 1
-    ret 12
-
-Invalid:
-
-    /* Fail, invalid IRQ */
-#if DBG
-    int 3
-#endif
-    xor eax, eax
-    ret 12
-.endfunc
-
 .globl _HalBeginSystemInterrupt@12
 .func HalBeginSystemInterrupt@12
 _HalBeginSystemInterrupt@12:

Modified: trunk/reactos/hal/halx86/generic/pic.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/hal/halx86/generic/pic.c?r…
==============================================================================
--- trunk/reactos/hal/halx86/generic/pic.c [iso-8859-1] (original)
+++ trunk/reactos/hal/halx86/generic/pic.c [iso-8859-1] Mon Jan 25 00:21:36 2010
@@ -341,3 +341,82 @@
     /* Mask out the requested bit */
     KeGetPcr()->IRR &= ~(1 << Irql);
 }
+
+/* SYSTEM INTERRUPTS **********************************************************/
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
+HalEnableSystemInterrupt(IN UCHAR Vector,
+                         IN KIRQL Irql,
+                         IN KINTERRUPT_MODE InterruptMode)
+{
+    ULONG Irq;
+    PKPCR Pcr = KeGetPcr();
+    PIC_MASK PicMask;
+    
+    /* Validate the IRQ */
+    Irq = Vector - PRIMARY_VECTOR_BASE;
+    if (Irq >= CLOCK2_LEVEL) return FALSE;
+    
+#ifdef PCI_IRQ_MP
+    /* Check if there is a PCI IRQ Routing Miniport Driver */
+    if (HalpIrqMiniportInitialized)
+    {
+        UNIMPLEMENTED;
+        while (TRUE);
+    }
+#endif
+    
+    /* Disable interrupts */
+    _disable();
+    
+    /* Update software IDR */
+    Pcr->IDR &= ~(1 << Irq);
+
+    /* Set new PIC mask */
+    PicMask.Both = KiI8259MaskTable[Pcr->Irql] | Pcr->IDR;
+    __outbyte(PIC1_DATA_PORT, PicMask.Master);
+    __outbyte(PIC2_DATA_PORT, PicMask.Slave);
+    
+    /* Enable interrupts and exit */
+    _enable();
+    return TRUE;
+}
+
+/*
+ * @implemented
+ */
+VOID
+NTAPI
+HalDisableSystemInterrupt(IN UCHAR Vector,
+                          IN KIRQL Irql)
+{
+    ULONG IrqMask;
+    PIC_MASK PicMask;
+
+    /* Compute new combined IRQ mask */
+    IrqMask = 1 << (Vector - PRIMARY_VECTOR_BASE);
+    
+    /* Disable interrupts */
+    _disable();
+    
+    /* Update software IDR */
+    KeGetPcr()->IDR |= IrqMask;
+    
+    /* Read current interrupt mask */
+    PicMask.Master = __inbyte(PIC1_DATA_PORT);
+    PicMask.Slave = __inbyte(PIC2_DATA_PORT);
+    
+    /* Add the new disabled interrupt */
+    PicMask.Both |= IrqMask;
+    
+    /* Write new interrupt mask */
+    __outbyte(PIC1_DATA_PORT, PicMask.Master);
+    __outbyte(PIC2_DATA_PORT, PicMask.Slave);
+    
+    /* Bring interrupts back */
+    _enable();
+}