Import a framework to program PICs

src/drivers/pic.c

@@ -0,0 +1,52 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include "pic.h"
+
+
+/* private */
+/* variables */
+static ukPIC * _pic = NULL;
+
+
+/* functions */
+/* pic_init */
+ukPIC * pic_init(ukBus * bus, char const * name)
+{
+	const ukPIC * drivers[] = {
+	};
+	size_t i;
+	ukPIC * pic = NULL;
+
+	for(i = 0; i < sizeof(drivers) / sizeof(*drivers); i++)
+		if(strncmp(drivers[i]->name, name,
+					strlen(drivers[i]->name)) == 0
+				&& drivers[i]->init != NULL)
+		{
+			fprintf(stderr, "%s PIC%s%s\n", name, (bus != NULL)
+					? " at " : "",
+					(bus != NULL) ? bus->name : "");
+			pic = drivers[i]->init(bus);
+		}
+	if(pic == NULL)
+		errno = ENODEV;
+	else if(_pic == NULL)
+		_pic = pic;
+	return pic;
+}
+
+
+/* accessors */
+/* pic_get_default */
+ukPIC * pic_get_default(void)
+{
+	if(_pic == NULL)
+		errno = ENODEV;
+	return _pic;
+}

src/drivers/pic.h

@@ -0,0 +1,38 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+#ifndef UKERNEL_DRIVERS_PIC_H
+# define UKERNEL_DRIVERS_PIC_H
+
+# include <stdint.h>
+# include "bus.h"
+
+
+/* public */
+/* types */
+typedef struct _ukPIC ukPIC;
+
+typedef struct _ukPICData ukPICData;
+
+struct _ukPIC
+{
+	char name[16];
+
+	ukPIC * (*init)(ukBus * bus);
+	void (*destroy)(ukPIC * pic);
+
+	ukPICData * data;
+};
+
+
+/* prototypes */
+ukPIC * pic_init(ukBus * bus, char const * name);
+void pic_destroy(ukPIC * pic);
+
+/* accessors */
+ukPIC * pic_get_default(void);
+
+#endif /* !UKERNEL_DRIVERS_PIC_H */

src/drivers/pic/project.conf

@@ -0,0 +1,5 @@
+cppflags_force=-nostdinc -isystem ../../../include -I../..
+cflags_force=`../../../tools/platform.sh -V UKERNEL_CFLAGS -C "$$ARCH"`
+cflags=-W -Wall -g -O2
+ldflags_force=`../../../tools/platform.sh -V UKERNEL_LDFLAGS -C "$$ARCH"`
+dist=Makefile