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, 9 insertions, 9 deletions

diff --git a/src/mainboard/kontron/986lcd-m/mainboard.c b/src/mainboard/kontron/986lcd-m/mainboard.c
index 3951ce663f..600058d502 100644
--- a/src/mainboard/kontron/986lcd-m/mainboard.c
+++ b/src/mainboard/kontron/986lcd-m/mainboard.c
@@ -20,7 +20,7 @@
 #include <types.h>
 #include <device/device.h>
 #include <console/console.h>
-#if CONFIG_PCI_OPTION_ROM_RUN_YABEL
+#if CONFIG_PCI_ROM_RUN || CONFIG_VGA_ROM_RUN
 #include <x86emu/x86emu.h>
 #endif
 #include <pc80/mc146818rtc.h>
@@ -64,7 +64,7 @@ static int int15_handler(void)
 #endif
 
 #if defined(CONFIG_PCI_OPTION_ROM_RUN_REALMODE) && CONFIG_PCI_OPTION_ROM_RUN_REALMODE
-static int int15_handler(struct eregs *regs)
+static int int15_handler(void)
 {
 	int res = 0;
 
@@ -73,7 +73,7 @@ static int int15_handler(struct eregs *regs)
 	 * the mainboard or northbridge code.
 	 * TODO: completely move to mainboards / chipsets.
 	 */
-	switch (regs->eax & 0xffff) {
+	switch (X86_EAX & 0xffff) {
 	/* And now Intel IGD code */
 #define BOOT_DISPLAY_DEFAULT    0
 #define BOOT_DISPLAY_CRT        (1 << 0)
@@ -85,19 +85,19 @@ static int int15_handler(struct eregs *regs)
 #define BOOT_DISPLAY_EFP2       (1 << 6)
 #define BOOT_DISPLAY_LCD2       (1 << 7)
 	case 0x5f35:
-		regs->eax = 0x5f;
-		regs->ecx = BOOT_DISPLAY_DEFAULT;
+		X86_EAX = 0x5f;
+		X86_ECX = BOOT_DISPLAY_DEFAULT;
 		res = 1;
 		break;
 	case 0x5f40:
-		regs->eax = 0x5f;
-		regs->ecx = 3; // This is mainboard specific
-		printk(BIOS_DEBUG, "DISPLAY=%x\n", regs->ecx);
+		X86_EAX = 0x5f;
+		X86_ECX = 3; // This is mainboard specific
+		printk(BIOS_DEBUG, "DISPLAY=%x\n", X86_ECX);
 		res = 1;
 		break;
 	default:
 		printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
-				regs->eax & 0xffff);
+				X86_EAX & 0xffff);
 	}
 
 	return res;