add int15 handler for thomson ip1000

fix mbi length detection, this will remove what looked like an endless loop
during vga init in some cases.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5408 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

3 files changed, 70 insertions, 2 deletions

diff --git a/src/mainboard/thomson/ip1000/mainboard.c b/src/mainboard/thomson/ip1000/mainboard.c
index f8f775a348..eeac3e3fc9 100644
--- a/src/mainboard/thomson/ip1000/mainboard.c
+++ b/src/mainboard/thomson/ip1000/mainboard.c
@@ -22,6 +22,9 @@
 #include <device/device.h>
 #include <boot/tables.h>
 #include <delay.h>
+#if CONFIG_PCI_OPTION_ROM_RUN_YABEL
+#include <x86emu/x86emu.h>
+#endif
 #include <arch/coreboot_tables.h>
 #include <arch/io.h>
 #include "chip.h"
@@ -102,6 +105,61 @@ static void flash_gpios(void)
 	}
 }
 
+
+#if CONFIG_PCI_OPTION_ROM_RUN_YABEL
+static int int15_handler(void)
+{
+	u8 display_id;
+#define BOOT_DISPLAY_DEFAULT	0
+#define BOOT_DISPLAY_CRT	(1 << 0)
+#define BOOT_DISPLAY_TV		(1 << 1)
+#define BOOT_DISPLAY_EFP	(1 << 2)
+#define BOOT_DISPLAY_LCD	(1 << 3)
+#define BOOT_DISPLAY_CRT2	(1 << 4)
+#define BOOT_DISPLAY_TV2	(1 << 5)
+#define BOOT_DISPLAY_EFP2	(1 << 6)
+#define BOOT_DISPLAY_LCD2	(1 << 7)
+
+	printk(BIOS_DEBUG, "%s: AX=%04x BX=%04x CX=%04x DX=%04x\n",
+			  __func__, M.x86.R_AX, M.x86.R_BX, M.x86.R_CX, M.x86.R_DX);
+
+	switch (M.x86.R_AX) {
+	case 0x5f35: /* Boot Display */
+		M.x86.R_AX = 0x005f; // Success
+		// M.x86.R_CL = BOOT_DISPLAY_TV;
+		M.x86.R_CL = BOOT_DISPLAY_DEFAULT;
+		break;
+	case 0x5f36: /* Boot TV Format Hook */
+		printk(BIOS_DEBUG, "Boot TV Format Hook. TODO\n");
+		/* Interrupt was not handled */
+		return 0;
+	case 0x5f31: /* Post Completion Hook */
+	case 0x5f33: /* Hook After Mode Set */
+	case 0x5f34: /* Set Panel Fitting Hook */
+	case 0x5f38: /* Hook Before Mode Set */
+	case 0x5f45: /* Hook Before VESA VBE/DDC */
+	case 0x5f46: /* Hook Before VESA VBE/PM */
+	case 0x5f47: /* Notif Display Switch Hook */
+	case 0x5f65: /* Local Memory Initialization Hook */
+		/* Interrupt was not handled */
+		return 0;
+	default:
+		/* Interrupt was not handled */
+		return 0;
+	}
+
+	/* Interrupt handled */
+	return 1;
+}
+
+static void int15_install(void)
+{
+	typedef int (* yabel_handleIntFunc)(void);
+	extern yabel_handleIntFunc yabel_intFuncArray[256];
+	yabel_intFuncArray[0x15] = int15_handler;
+}
+#endif
+
 static void mainboard_init(device_t dev)
 {
 	parport_gpios();
@@ -111,6 +169,10 @@ static void mainboard_init(device_t dev)
 static void mainboard_enable(device_t dev)
 {
 	dev->ops->init = mainboard_init;
+#if CONFIG_PCI_OPTION_ROM_RUN_YABEL
+	/* Install custom int15 handler for VGA OPROM */
+	int15_install();
+#endif
 }
 
 struct chip_operations mainboard_ops = {
diff --git a/src/northbridge/intel/i82830/i82830_smihandler.c b/src/northbridge/intel/i82830/i82830_smihandler.c
index e53d283b4b..733e624c26 100644
--- a/src/northbridge/intel/i82830/i82830_smihandler.c
+++ b/src/northbridge/intel/i82830/i82830_smihandler.c
@@ -187,7 +187,7 @@ static void mbi_call(u8 subf, banner_id_t *banner_id)
 		int i, count=0;
 		obj_header->banner.retsts = MSH_IF_NOT_FOUND;
 
-		for (i=0; i< mbi_len;) {
+		for (i=0; i<mbi_len;) {
 			int len;
 
 			if (!(mbi[i] == 0xf0 && mbi [i+1] == 0xf6)) {
@@ -199,6 +199,12 @@ static void mbi_call(u8 subf, banner_id_t *banner_id)
 			len = ALIGN((mbi_header->size * 16) + sizeof(mbi_header) + mbi_header->name_len, 16);
 			
 			if (obj_header->objnum == count) {
+#ifdef DEBUG_SMI_I82830
+				if (mbi_header->name_len == 0xff) {
+					printk(BIOS_DEBUG, "|  |- corrupt.\n");
+					break;
+				}
+#endif
 				int headerlen = ALIGN(sizeof(mbi_header) + mbi_header->name_len + 15, 16);
 #ifdef DEBUG_SMI_I82830
 				printk(BIOS_DEBUG, "|  |- headerlen = %d\n", headerlen);
diff --git a/src/northbridge/intel/i82830/vga.c b/src/northbridge/intel/i82830/vga.c
index 37c967414b..66b591b548 100644
--- a/src/northbridge/intel/i82830/vga.c
+++ b/src/northbridge/intel/i82830/vga.c
@@ -42,7 +42,7 @@ static void vga_init(device_t dev)
 			       "type %x\n", file->type, CBFS_TYPE_MBI);
 		} else {
 			mbi = (void *) CBFS_SUBHEADER(file);
-			mbi_len = file->len;
+			mbi_len = ntohl(file->len);
 		}
 	} else {
 		printk(BIOS_INFO,  "Could not find MBI.\n");