From 95d5bdb27fd6ca63356a618dc89820e5611b8497 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <address@hidden>
Date: Mon, 3 Dec 2018 17:04:04 +0100
Subject: [PATCH] benchmark: add exit points

---
 pc-bios/optionrom/benchmark.h     | 14 ++++++++++++++
 pc-bios/optionrom/linuxboot_dma.c |  3 +++
 2 files changed, 17 insertions(+)
 create mode 100644 pc-bios/optionrom/benchmark.h

diff --git a/pc-bios/optionrom/benchmark.h b/pc-bios/optionrom/benchmark.h
new file mode 100644
index 0000000000..38d0d88798
--- /dev/null
+++ b/pc-bios/optionrom/benchmark.h
@@ -0,0 +1,14 @@
+#ifndef BENCHMARK_H
+#define BENCHMARK_H
+
+/* IO ports for different exit points */
+#define LINUX_EXIT_PORT 0xf4
+#define FW_EXIT_PORT    0xf5
+
+/* Exit point values */
+#define FW_START    1
+#define LINUX_START_FWCFG 2
+#define LINUX_START_BOOT  3
+#define FW_DO_BOOT 4
+
+#endif
diff --git a/pc-bios/optionrom/linuxboot_dma.c b/pc-bios/optionrom/linuxboot_dma.c
index 4754282ad7..577199388f 100644
--- a/pc-bios/optionrom/linuxboot_dma.c
+++ b/pc-bios/optionrom/linuxboot_dma.c
@@ -59,6 +59,7 @@ asm(
 );
 
 #include "../../include/hw/nvram/fw_cfg_keys.h"
+#include "benchmark.h"
 
 /* QEMU_CFG_DMA_CONTROL bits */
 #define BIOS_CFG_DMA_CTL_ERROR   0x01
@@ -265,6 +266,8 @@ void load_kernel(void)
     segment_addr = ((uint32_t)setup_addr >> 4);
     stack_addr = (uint32_t)(cmdline_addr - setup_addr - 16);
 
+    outl(LINUX_START_BOOT, LINUX_EXIT_PORT);
+
     /* As we are changing critical registers, we cannot leave freedom to the
      * compiler.
      */
-- 
2.19.2