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 a interface to load the SMP functions for the current architecture.
*kern/smp.h: Header file. Add declaration for smp_data structure.
*i386/i386/smp.c: Source file. Implements a set of functions to manage the SMP actions in i386
*i386/i386/smp.h: Header file. Add declarations for SMP functions in i386.

3 files changed, 76 insertions, 0 deletions

diff --git a/i386/Makefrag.am b/i386/Makefrag.am
index 0f788f30..73df45f4 100644
--- a/i386/Makefrag.am
+++ b/i386/Makefrag.am
@@ -132,6 +132,8 @@ libkernel_a_SOURCES += \
 	i386/i386/seg.c \
 	i386/i386/seg.h \
 	i386/i386/setjmp.h \
+	i386/i386/smp.h \
+	i386/i386/smp.c \
 	i386/i386/spl.S \
 	i386/i386/spl.h \
 	i386/i386/strings.c \
diff --git a/i386/i386/smp.c b/i386/i386/smp.c
new file mode 100644
index 00000000..f64fb7f7
--- /dev/null
+++ b/i386/i386/smp.c
@@ -0,0 +1,53 @@
+/* smp.h - i386 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 <i386/i386/apic.h>
+#include <i386/i386/smp.h>
+#include <i386/i386at/acpi_parse_apic.h>
+
+#include <kern/smp.h>
+
+
+/*
+ * smp_data_init: initialize smp_data structure
+ * Must be called after smp_init(), once all APIC structures
+ * has been initialized
+ */
+static void smp_data_init(void)
+{
+    uint8_t numcpus = apic_get_numcpus();
+    smp_set_numcpus(numcpus);
+}
+
+/*
+ * 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 == ACPI_SUCCESS) {
+        smp_data_init();
+    }
+
+    return apic_success;
+}
diff --git a/i386/i386/smp.h b/i386/i386/smp.h
new file mode 100644
index 00000000..b36ead08
--- /dev/null
+++ b/i386/i386/smp.h
@@ -0,0 +1,21 @@
+/* smp.h - i386 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. */
+
+int smp_init(void);