From ad24b764d654c36b40ad2099d08d95bff9856cdd Mon Sep 17 00:00:00 2001
From: Matheus Pecoraro <matpecor@gmail.com>
Date: Mon, 3 Jun 2024 15:45:29 -0300
Subject: [PATCH] amd64: Add bsp_reset

Add a temporary implementation of bsp_reset using the keyboard
controller until the ACPI method can be implemented
---
 bsps/x86_64/amd64/start/bspreset.c           | 37 ++++++++++++++++++++
 spec/build/bsps/x86_64/amd64/bspamd64.yml    |  2 +-
 spec/build/bsps/x86_64/amd64/bspamd64efi.yml |  2 +-
 3 files changed, 39 insertions(+), 2 deletions(-)
 create mode 100644 bsps/x86_64/amd64/start/bspreset.c

diff --git a/bsps/x86_64/amd64/start/bspreset.c b/bsps/x86_64/amd64/start/bspreset.c
new file mode 100644
index 0000000000..9402345242
--- /dev/null
+++ b/bsps/x86_64/amd64/start/bspreset.c
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2024 Matheus Pecoraro
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <bsp/bootcard.h>
+
+#define KEYBOARD_CONTROLLER_PORT 0x64
+#define PULSE_RESET_LINE         0xFE
+
+/* TODO: Update this method once APICA is implemented */
+void bsp_reset(void)
+{
+  outport_byte(KEYBOARD_CONTROLLER_PORT, PULSE_RESET_LINE);
+}
diff --git a/spec/build/bsps/x86_64/amd64/bspamd64.yml b/spec/build/bsps/x86_64/amd64/bspamd64.yml
index c05c0bc4ff..b07687b7a0 100644
--- a/spec/build/bsps/x86_64/amd64/bspamd64.yml
+++ b/spec/build/bsps/x86_64/amd64/bspamd64.yml
@@ -45,7 +45,6 @@ source:
 - bsps/shared/dev/serial/console-termios.c
 - bsps/shared/irq/irq-default-handler.c
 - bsps/shared/start/bspfatal-default.c
-- bsps/shared/start/bspreset-empty.c
 - bsps/shared/start/gettargethash-default.c
 - bsps/shared/start/sbrk.c
 - bsps/x86_64/amd64/clock/clock.c
@@ -54,5 +53,6 @@ source:
 - bsps/x86_64/amd64/interrupts/isr_handler.S
 - bsps/x86_64/amd64/interrupts/pic.c
 - bsps/x86_64/amd64/start/bspstart.c
+- bsps/x86_64/amd64/start/bspreset.c
 - bsps/x86_64/amd64/start/page.c
 type: build
diff --git a/spec/build/bsps/x86_64/amd64/bspamd64efi.yml b/spec/build/bsps/x86_64/amd64/bspamd64efi.yml
index e822252002..9dfefc4b59 100644
--- a/spec/build/bsps/x86_64/amd64/bspamd64efi.yml
+++ b/spec/build/bsps/x86_64/amd64/bspamd64efi.yml
@@ -65,7 +65,6 @@ source:
 - bsps/shared/dev/serial/console-termios.c
 - bsps/shared/irq/irq-default-handler.c
 - bsps/shared/start/bspfatal-default.c
-- bsps/shared/start/bspreset-empty.c
 - bsps/shared/start/gettargethash-default.c
 - bsps/shared/start/sbrk.c
 - bsps/x86_64/amd64/clock/eficlock.c
@@ -78,6 +77,7 @@ source:
 - bsps/x86_64/amd64/interrupts/isr_handler.S
 - bsps/x86_64/amd64/interrupts/pic.c
 - bsps/x86_64/amd64/start/bspstart.c
+- bsps/x86_64/amd64/start/bspreset.c
 - bsps/x86_64/amd64/start/multiboot2.c
 - bsps/x86_64/amd64/start/efimem.c
 - bsps/x86_64/amd64/start/page.c