Changeset 67a2288 in rtems for c/src/exec/score/cpu/i386/cpu.c

Timestamp:

07/23/98 22:02:34 (25 years ago)

Author:

Joel Sherrill <joel.sherrill@…>

Branches:

4.10, 4.11, 4.8, 4.9, 5, master

Children:

dbaf51a

Parents:

73452854

Message:

Patch from Eric VALETTE <valette@…>:

Here is a enhanced version of my previous patch. This patch enables
to potentially share the new interrupt management code for all Intel targets
(pc386, go32 and force386) bsp.

Note : this patch is complete only for pc386. It still needs to

be completed for go32 and force386. I carrefully checked
that anything needed is in for force386 (only some function
name changes for IDT manipulation and GDT segment
manipulation). But anyway I will not be able to test any
of theses targets...

File:

• c/src/exec/score/cpu/i386/cpu.c (modified) (1 diff)

c/src/exec/score/cpu/i386/cpu.c

@@ -77 +77 @@
 }
  
-/*PAGE
- *
- *  _CPU_ISR_install_raw_handler
- */
- 
-#if __GO32__
-#include <go32.h>
-#include <dpmi.h>
-#endif /* __GO32__ */
-
-void _CPU_ISR_install_raw_handler(
-  unsigned32  vector,
-  proc_ptr    new_handler,
-  proc_ptr   *old_handler
-)
-{
-#if __GO32__
-    _go32_dpmi_seginfo handler_info;
- 
-    /* get the address of the old handler */
-    _go32_dpmi_get_protected_mode_interrupt_vector( vector, &handler_info);
- 
-    /* Notice how we're failing to save the pm_segment portion of the */
-    /* structure here?  That means we might crash the system if we  */
-    /* try to restore the ISR.  Can't fix this until i386_isr is  */
-    /* redefined.  XXX [BHC].           */
-    *old_handler = (proc_ptr *) handler_info.pm_offset;
-
-    handler_info.pm_offset = (u_long) new_handler;
-    handler_info.pm_selector = _go32_my_cs();
-
-    /* install the IDT entry */
-    _go32_dpmi_set_protected_mode_interrupt_vector( vector, &handler_info );
-#else
-  i386_IDT_slot idt;
-  unsigned32    handler;
-
-  *old_handler =  0;    /* XXX not supported */
-
-  handler = (unsigned32) new_handler;
-
-  /* build the IDT entry */
-  idt.offset_0_15      = handler & 0xffff;
-  idt.segment_selector = i386_get_cs();
-  idt.reserved         = 0x00;
-  idt.p_dpl            = 0x8e;         /* present, ISR */
-  idt.offset_16_31     = handler >> 16;
-
-  /* install the IDT entry */
-  i386_Install_idt(
-    (unsigned32) &idt,
-    _CPU_Table.interrupt_table_segment,
-    (unsigned32) _CPU_Table.interrupt_table_offset + (8 * vector)
-  );
-#endif
-}
-
-/*PAGE
- *
- *  _CPU_ISR_install_vector
- *
- *  This kernel routine installs the RTEMS handler for the
- *  specified vector.
- *
- *  Input parameters:
- *    vector      - interrupt vector number
- *    old_handler - former ISR for this vector number
- *    new_handler - replacement ISR for this vector number
- *
- *  Output parameters:  NONE
- *
- */
-
-void _ISR_Handler_0(), _ISR_Handler_1();
-
-#define PER_ISR_ENTRY \
-    (((unsigned32) _ISR_Handler_1 - (unsigned32) _ISR_Handler_0))
-
-#define _Interrupt_Handler_entry( _vector ) \
-   (((unsigned32)_ISR_Handler_0) + ((_vector) * PER_ISR_ENTRY))
-
-void _CPU_ISR_install_vector(
-  unsigned32  vector,
-  proc_ptr    new_handler,
-  proc_ptr   *old_handler
-)
-{
-  proc_ptr      ignored;
-  unsigned32    unique_handler;
-
-  *old_handler = _ISR_Vector_table[ vector ];
-
-  /* calculate the unique entry point for this vector */
-  unique_handler = _Interrupt_Handler_entry( vector );
-
-  _CPU_ISR_install_raw_handler( vector, (void *)unique_handler, &ignored );
-
-  _ISR_Vector_table[ vector ] = new_handler;
-}