Add experimental feature to run vga optionrom in parallel with init.

Add option (default disabled) that allows the vga rom to run while
    hardware init is still in progress.

2 files changed, 13 insertions, 5 deletions

diff --git a/src/config.h b/src/config.h
index 05f3942..9c7c504 100644
--- a/src/config.h
+++ b/src/config.h
@@ -24,6 +24,8 @@
 
 // Support running hardware initialization in parallel
 #define CONFIG_THREADS 1
+// Allow hardware init to run in parallel with optionrom execution
+#define CONFIG_THREAD_OPTIONROMS 0
 // Support int13 disk/floppy drive functions
 #define CONFIG_DRIVES 1
 // Support floppy drive access
@@ -187,6 +189,6 @@
 #define DEBUG_ISR_hwpic2 5
 #define DEBUG_HDL_pnp 1
 #define DEBUG_HDL_pmm 1
-#define DEBUG_thread 1
+#define DEBUG_thread 2
 
 #endif // config.h
diff --git a/src/post.c b/src/post.c
index 085fb91..fd60236 100644
--- a/src/post.c
+++ b/src/post.c
@@ -182,10 +182,14 @@ post()
     pci_setup();
     smm_init();
 
-    // Run vga option rom.
+    // Setup interfaces that option roms may need
     pmm_setup();
     pnp_setup();
-    vga_setup();
+    init_bios_tables();
+
+    // Run vga option rom (if running synchronously)
+    if (!CONFIG_THREADS || !CONFIG_THREAD_OPTIONROMS)
+        vga_setup();
 
     // Initialize hardware devices
     usb_setup();
@@ -201,8 +205,10 @@ post()
     ata_setup();
     ramdisk_setup();
 
-    // Run option roms (non vga)
-    init_bios_tables();
+    // Run option roms
+    if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS)
+        // Run vga option rom (if running asynchronously)
+        vga_setup();
     wait_threads();
     optionrom_setup();