From c5670393c5ce7c6f6a39bd669c4a6f8487510068 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Almudena=20Garc=C3=ADa?= <almuhs@gitlab.com>
Date: Mon, 20 Jul 2020 00:16:11 +0200
Subject: [PATCH 5/7] smp: Add generic smp pseudoclass

This pseudoclass generalize the initialization and access of SMP data,
allowing expands it to other architectures. In x86, the functions calls to apic functions.

*kern/smp.c: Source file. Implements some functions to get the number of cpus,
and get current cpu.
*kern/smp.h: Header file. Add declarations of functions and structures.
---
 kern/smp.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 kern/smp.h | 28 ++++++++++++++++++++++
 2 files changed, 96 insertions(+)
 create mode 100644 kern/smp.c
 create mode 100644 kern/smp.h

diff --git a/kern/smp.c b/kern/smp.c
new file mode 100644
index 00000000..3e0e4323
--- /dev/null
+++ b/kern/smp.c
@@ -0,0 +1,68 @@
+/* smp.c - Template for generic SMP controller for Mach.
+   Copyright (C) 2020 Free Software Foundation, Inc.
+   Written by Almudena Garcia Jurado-Centurion
+
+   This file is part of GNU Mach.
+
+   GNU Mach is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   GNU Mach is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include <kern/smp.h>
+
+struct smp_data smp_info;
+
+#ifdef __i386__
+#include <i386/i386/apic.h>
+#include <i386/i386at/acpi_parse_apic.h>
+
+/* smp_data_init: initialize smp_data structure
+ * Must be called after smp_init(), once all APIC structures
+ * has been initialized
+ */
+
+void smp_data_init(void)
+{
+    smp_info.num_cpus = apic_get_numcpus();
+}
+
+/* smp_get_numcpus: returns the number of cpus existing in the machine */
+
+int smp_get_numcpus(void)
+{
+    return smp_info.num_cpus;
+}
+
+/* smp_get_current_cpu: return the hardware identifier (APIC ID in x86) of current CPU */
+
+int smp_get_current_cpu(void)
+{
+    return apic_get_current_cpu();
+}
+
+/* smp_init: initialize the SMP support, starting the cpus searching
+ *  and enumeration */
+
+int smp_init(void)
+{
+    int apic_success;
+
+    apic_success = acpi_apic_init();
+    if (apic_success) {
+        smp_data_init();
+    }
+
+    return apic_success;
+}
+
+#endif
diff --git a/kern/smp.h b/kern/smp.h
new file mode 100644
index 00000000..031e5bac
--- /dev/null
+++ b/kern/smp.h
@@ -0,0 +1,28 @@
+/* smp.h - Template for generic SMP controller for Mach. Header file
+   Copyright (C) 2020 Free Software Foundation, Inc.
+   Written by Almudena Garcia Jurado-Centurion
+
+   This file is part of GNU Mach.
+
+   GNU Mach is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   GNU Mach is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+struct smp_data {
+    int num_cpus;
+};
+
+void smp_data_init(void);
+int smp_get_numcpus(void);
+int smp_get_current_cpu(void);
+int smp_init(void);
-- 
2.27.0