x86 realmode: Use x86emu register file + defines

By using the (global) register file as defined by x86emu,
we can use the same register access for YABEL and realmode
interrupt handlers.

- the x86 realmode interrupt handlers changed in signature
- to access registers, use X86_$REGNAME now (eg. X86_EAX)
- x86_exception_handler still uses struct eregs *regs to
  avoid spilling the x86emu register file stuff everywhere

Coccinelle script that handled most of this commit:
  @ inthandler @
  identifier FUNC, regs;
  @@
  int FUNC(
  -struct eregs *regs
  +void
   )
  { ... }

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->eax
  +X86_EAX

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->ebx
  +X86_EBX

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->ecx
  +X86_ECX

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->edx
  +X86_EDX

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->esi
  +X86_ESI

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->edi
  +X86_EDI

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->eflags
  +X86_EFLAGS

  @ depends on inthandler @
  identifier regs;
  @@
  -regs->vector
  +M.x86.intno

Change-Id: I60cc2c36646fe4b7f97457b1e297e3df086daa36
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/1891
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 10 insertions, 9 deletions

diff --git a/src/mainboard/technexion/tim5690/vgabios.c b/src/mainboard/technexion/tim5690/vgabios.c
index 6c9b45e639..46a9b58441 100644
--- a/src/mainboard/technexion/tim5690/vgabios.c
+++ b/src/mainboard/technexion/tim5690/vgabios.c
@@ -24,9 +24,10 @@
 #include <console/console.h>
 #include <arch/interrupt.h>
 #include "vgabios.h"
+#include <x86emu/regs.h>
 
 
-int tim5690_int15_handler(struct eregs *regs);
+int tim5690_int15_handler(void);
 
 static rs690_vbios_regs vbios_regs_local;
 
@@ -38,30 +39,30 @@ static void vbios_fun_init(rs690_vbios_regs *vbios_regs)
 }
 
 /* BIOS int15 function */
-int tim5690_int15_handler(struct eregs *regs)
+int tim5690_int15_handler(void)
 {
         int res = 0;
 
         printk(BIOS_DEBUG, "tim5690_int15_handler\n");
 
-        switch (regs->eax & 0xffff) {
+        switch (X86_EAX & 0xffff) {
         case AMD_RS690_INT15:
-                switch (regs->ebx & 0xff) {
+                switch (X86_EBX & 0xff) {
                 case 0x00:
-                        regs->eax &= ~(0xff);
-                        regs->ebx = (regs->ebx & ~(0xff)) | vbios_regs_local.int15_regs.fun00_panel_id;
+                        X86_EAX &= ~(0xff);
+                        X86_EBX = (X86_EBX & ~(0xff)) | vbios_regs_local.int15_regs.fun00_panel_id;
                         res = 1;
                         break;
                 case 0x05:
-                        regs->eax &= ~(0xff);
-                        regs->ebx = (regs->ebx & ~(0xff)) | vbios_regs_local.int15_regs.fun05_tv_standard;
+                        X86_EAX &= ~(0xff);
+                        X86_EBX = (X86_EBX & ~(0xff)) | vbios_regs_local.int15_regs.fun05_tv_standard;
                         res = 1;
                         break;
                 }
                 break;
         default:
                 printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
-                                regs->eax & 0xffff);
+                                X86_EAX & 0xffff);
 		break;
         }