Changeset 231 for soft/giet_vm/sys/ctx_handler.h

Timestamp:

Mar 5, 2013, 1:42:57 PM (11 years ago)

Author:

joannou

Message:

• Bugfix in Interruption mechanism :
  • _it_mask() and _it_restore() functions now share a global array indexed by the proc_id (used a simple global variable before => problem with multiproc)
  • added 2 new fuctions _it_enable() and _it_disable() that only affect the IE bit of the status register in COP0
  • replaced interrupt masking/restoring arround _ctx_switch() in sys_handler by a simple interrupt disabling before the call to _ctx_switch (restoring after a _ctx_switch wouldn't restore the correct task's status register)
  • replaced the use of _ctx_switch in _exit() by a call to _context_switch() (this function actually does the interrupt disabling)
• Added some comments in the ctx_handler.h
• Added the delay reset in the idle task (ctx_handler.c)
• Added a new irq type (PTI)
  • Modifications in xml_parser.c to accept PTI irq type (now used in xml mappings)
  • Added the test on the irq type in the _irq_demux() function. This leads to a different argument passed to the ISR (i.e. either channel_id or irq_id (aka icuid) )

File:

• soft/giet_vm/sys/ctx_handler.h (modified) (1 diff)

soft/giet_vm/sys/ctx_handler.h

@@ -37 +37 @@
 #define CTX_PTPR_ID             39
 
-#define CTX_TTY_ID              40
-#define CTX_DMA_ID          41
-#define CTX_NIC_ID          42
-#define CTX_TIMER_ID    43
-#define CTX_PTAB_ID             44
-#define CTX_LTID_ID             45
-#define CTX_VSID_ID             46
-#define CTX_RUN_ID              47
+#define CTX_TTY_ID              40  // Integer : global TTY terminal index 
+#define CTX_DMA_ID          41  // Integer : global DMA channel index
+#define CTX_NIC_ID          42  // Integer : global NIC channel index
+#define CTX_TIMER_ID    43  // Integer : user level timer index / UNUSED
+#define CTX_PTAB_ID             44  // Pointer : page table virtual base adress
+#define CTX_LTID_ID             45  // Integer : local task index (in scheduler) / UNUSED
+#define CTX_VSID_ID             46  // Integer : vspace index
+#define CTX_RUN_ID              47  // Boolean : task runable
 
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