Changeset fd67c9f in mainline for kernel/genarch/include

Timestamp:

2019-04-06T08:10:27Z (7 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

534bcdf

Parents:

ef56a43

Message:

Handle PIC spurious IRQs with care

File:

• kernel/genarch/include/genarch/drivers/i8259/i8259.h (modified) (3 diffs)

kernel/genarch/include/genarch/drivers/i8259/i8259.h

@@ -38 +38 @@
 #include <typedefs.h>
 #include <arch/interrupt.h>
+#include <stdbool.h>
 
 /* ICW1 bits */
@@ -43 +44 @@
 #define PIC_ICW1_NEEDICW4  (1 << 0)
 
+/* OCW3 bits */
+#define PIC_OCW3           (1 << 3)
+#define PIC_OCW3_READ_ISR  (3 << 0)
+
 /* OCW4 bits */
 #define PIC_OCW4           (0 << 3)
 #define PIC_OCW4_NSEOI     (1 << 5)
+
+#define PIC_IRQ_COUNT      8
+#define PIC_SPURIOUS_IRQ   7
 
 typedef struct {
@@ -56 +64 @@
 extern void pic_disable_irqs(uint16_t);
 extern void pic_eoi(unsigned int);
+extern bool pic_is_spurious(unsigned int);
+extern void pic_handle_spurious(unsigned int);
 
 #endif