boot menu option (#1625)

- add boot menu option
- enable `CONFIG_BOOTMENU` in seabios config

bios/seabios-debug.config

@@ -13,7 +13,8 @@ CONFIG_QEMU_HARDWARE=y
 CONFIG_XEN=y
 CONFIG_THREADS=y
 # CONFIG_RELOCATE_INIT is not set
-# CONFIG_BOOTMENU is not set
+CONFIG_BOOTMENU=y
+# CONFIG_BOOTSPLASH is not set
 CONFIG_BOOTORDER=y
 CONFIG_HOST_BIOS_GEOMETRY=y
 CONFIG_ENTRY_EXTRASTACK=y

bios/seabios.config

@@ -13,7 +13,8 @@ CONFIG_QEMU_HARDWARE=y
 CONFIG_XEN=y
 CONFIG_THREADS=y
 # CONFIG_RELOCATE_INIT is not set
-# CONFIG_BOOTMENU is not set
+CONFIG_BOOTMENU=y
+# CONFIG_BOOTSPLASH is not set
 CONFIG_BOOTORDER=y
 CONFIG_HOST_BIOS_GEOMETRY=y
 CONFIG_ENTRY_EXTRASTACK=y

src/browser/starter.js

@@ -234,6 +234,7 @@ V86.prototype.continue_init = async function(emulator, options)
     settings.vga_memory_size = options.vga_memory_size || 8 * 1024 * 1024;
     settings.boot_order = boot_order;
     settings.fastboot = options.fastboot || false;
+    settings.bootmenu = options.bootmenu || false;
     settings.fda = undefined;
     settings.fdb = undefined;
     settings.uart1 = options.uart1;

src/const.js

@@ -118,6 +118,7 @@ export const FW_CFG_SIGNATURE = 0x00;
 export const FW_CFG_ID = 0x01;
 export const FW_CFG_RAM_SIZE = 0x03;
 export const FW_CFG_NB_CPUS = 0x05;
+export const FW_CFG_BOOT_MENU = 0x0E;
 export const FW_CFG_MAX_CPUS = 0x0F;
 export const FW_CFG_NUMA = 0x0D;
 export const FW_CFG_FILE_DIR = 0x19;

src/cpu.js

@@ -2,7 +2,7 @@ import {
     LOG_CPU, LOG_BIOS,
     FW_CFG_SIGNATURE, FW_CFG_SIGNATURE_QEMU,
     WASM_TABLE_SIZE, WASM_TABLE_OFFSET, FW_CFG_ID,
-    FW_CFG_RAM_SIZE, FW_CFG_NB_CPUS, FW_CFG_MAX_CPUS,
+    FW_CFG_RAM_SIZE, FW_CFG_NB_CPUS, FW_CFG_MAX_CPUS, FW_CFG_BOOT_MENU,
     FW_CFG_NUMA, FW_CFG_FILE_DIR, FW_CFG_FILE_START,
     FW_CFG_CUSTOM_START, FLAGS_DEFAULT,
     MMAP_BLOCK_BITS, MMAP_BLOCK_SIZE, MMAP_MAX,
@@ -1107,6 +1107,10 @@ CPU.prototype.init = function(settings, device_bus)
         {
             this.fw_value = i32(1);
         }
+        else if(value === FW_CFG_BOOT_MENU)
+        {
+            this.fw_value = i32(+settings.bootmenu);
+        }
         else if(value === FW_CFG_NUMA)
         {
             this.fw_value = new Uint8Array(16);

v86.d.ts

@@ -563,6 +563,12 @@ export interface V86Options {
      */
     fastboot?: boolean;
 
+    /**
+     * Enable the boot menu (seabios)
+     * @default false
+     */
+    bootmenu?: boolean;
+
     /**
      * Create a virtio balloon device
      * @default false