Changes between Version 29 and Version 30 of kernel_interrupts

Timestamp:

Dec 10, 2016, 11:52:57 AM (8 years ago)

Author:

alain

Comment:

--

kernel_interrupts

@@ -51 +51 @@
 
  === void '''_ext_irq_init'''() ===
-This initializes the ''_ext_irq_index[isr][channel]'' kernel array. This array defines the IRQ index (i.e. the IOPIC input index) associated to an (isr_type / isr_channel) couple, as specified in the mapping. It defines the hardware connexions between external peripherals and the IOPIC external IRQ controller, and is used by the kernel for dynamic routing of external IRQs.
+This function is only used when the architecture contains an external IOPIC component. It initializes the ''_ext_irq_index[isr][channel]'' kernel array, that defines the IRQ index (i.e. the IOPIC input IRQ index) associated to an (isr_type / isr_channel) couple, as specified in the mapping. It defines the hardware connexions between external peripherals and the IOPIC external IRQ controller, and is used by the kernel for dynamic routing of external IRQs.
 
  === void '''_ext_irq_alloc( unsigned int isr_type , unsigned int isr_channel , unsigned int* wti_index ) ===
-This function dynamically allocates an external IRQ signaling completion of an I/O operation to the processor P[x,y,p] running the calling task. The two (isr_type / isr_channel) arguments define actually the external IRQ to be routed.
+This function is only used when the architecture contains an external IOPIC component. It allocates an external IRQ signaling completion of an I/O operation to the processor P[x,y,p] running the calling task. The two (isr_type / isr_channel) arguments define actually the external IRQ to be routed.
  * '''isr_type''' : type of ISR 
  * '''isr_channel''' : ISR channel (for multi-channels peripherals)
@@ -64 +64 @@
 
  === void '''_ext_irq_release( unsigned int isr_type , unsigned int isr_channel , unsigned int wti_index ) ===
-This function desallocates the ressources allocated by the  previous _ext_irq_alloc() function to the calling processor. The two (isr_type, isr_channel) arguments define actually the external IRQ to be released.
+This function is only used when the architecture contains an external IOPIC component. It desallocates the ressources allocated by the  previous _ext_irq_alloc() function to the calling processor. The two (isr_type, isr_channel) arguments define actually the external IRQ to be released.
  * '''isr_type''' : type of ISR 
  * '''isr_channel''' : ISR channel (for multi-channels peripherals)
@@ -88 +88 @@
 
 As most ISRs (Interrupt Service Routine) are associated to a specific peripheral, these ISR are defined in the
-[wiki:periphal_drivers drivers]. But the following ISRs are defined in the [source:soft/giet_vm/giet_kernel/irq_handler.c irq_handler.c] file:
+[wiki:periphal_drivers drivers]. Some ISRs are defined in the [source:soft/giet_vm/giet_kernel/irq_handler.c irq_handler.c] file: