Introduce the "ioport" bus

src/drivers/bus.c

@@ -0,0 +1,12 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+#include "bus.h"
+
+
+#if defined(__amd64__) || defined(__i386__)
+# include "bus/ioport.c"
+#endif

src/drivers/bus.h

@@ -0,0 +1,25 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+#ifndef UKERNEL_DRIVERS_BUS_H
+# define UKERNEL_DRIVERS_BUS_H
+
+# include <stdint.h>
+
+
+/* public */
+/* types */
+typedef struct _Bus Bus;
+
+
+/* prototypes */
+Bus * bus_init(void);
+
+/* useful */
+int bus_write8(Bus * bus, void * addr, uint8_t value);
+int bus_write16(Bus * bus, void * addr, uint16_t value);
+int bus_write32(Bus * bus, void * addr, uint32_t value);
+
+#endif /* !UKERNEL_DRIVERS_BUS_H */

src/drivers/bus/ioport.S

@@ -0,0 +1,18 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+#if defined(__amd64__) || defined(__i386__)
+/* functions */
+.section .text
+/* bus_write8 */
+.global bus_write8
+.type bus_write8, @function
+bus_write8:
+	mov 0x8(%esp), %dx
+	mov 0xc(%esp), %al
+	out %al, %dx
+	ret
+#endif

src/drivers/bus/ioport.c

@@ -0,0 +1,50 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+#include <errno.h>
+
+
+/* private */
+/* types */
+struct _Bus
+{
+};
+
+
+/* variables */
+static Bus _ioport_bus;
+
+
+/* public */
+/* functions */
+/* bus_init */
+Bus * bus_init(void)
+{
+	return &_ioport_bus;
+}
+
+
+/* useful */
+/* bus_write16 */
+int bus_write16(Bus * bus, void * addr, uint16_t value)
+{
+	(void) bus;
+	(void) addr;
+	(void) value;
+
+	return -ENOTSUP;
+}
+
+
+/* bus_write32 */
+int bus_write32(Bus * bus, void * addr, uint32_t value)
+{
+	(void) bus;
+	(void) addr;
+	(void) value;
+
+	return -ENOTSUP;
+}

src/drivers/bus/project.conf

@@ -0,0 +1 @@
+dist=Makefile,ioport.c

src/drivers/console.h

@@ -7,6 +7,7 @@
 # define UKERNEL_DRIVERS_CONSOLE_H
 
 # include <stdint.h>
+# include "bus.h"
 
 
 /* public */
@@ -15,7 +16,7 @@ typedef struct _Console Console;
 
 
 /* prototypes */
-Console * console_init(void);
+Console * console_init(Bus * bus);
 
 /* useful */
 void console_clear(Console * console);

src/drivers/console/vga.c

@@ -36,8 +36,10 @@ static void _vga_scroll(Console * console, size_t rows);
 /* public */
 /* functions */
 /* console_init */
-Console * console_init(void)
+Console * console_init(Bus * bus)
 {
+	(void) bus;
+
 	_vga_console.buf = (uint16_t *)VGA_ADDRESS_BASE;
 	_vga_console.color_bg = VGA_TEXT_COLOR_BLACK;
 	_vga_console.color_fg = VGA_TEXT_COLOR_WHITE;

src/drivers/project.conf

@@ -1,2 +1,2 @@
-subdirs=console
-dist=Makefile,console.h
+subdirs=bus,console
+dist=Makefile,bus.h,console.h

src/main.c

@@ -4,6 +4,7 @@
 
 
 
+#include "drivers/bus.h"
 #include "drivers/console.h"
 
 
@@ -12,10 +13,12 @@
 /* main */
 int main(void)
 {
+	Bus * bus;
 	Console * console;
 	const char msg[] = "Starting DeforaOS...\n";
 
-	console = console_init();
+	bus = bus_init();
+	console = console_init(bus);
 	console_print(console, msg, sizeof(msg) - 1);
 	return 0;
 }

src/project.conf

@@ -26,7 +26,7 @@ sources=crtn.S
 
 [uKernel.bin]
 type=binary
-sources=boot.S,drivers/console.c,main.c
+sources=boot.S,drivers/bus.c,drivers/bus/ioport.S,drivers/console.c,main.c
 ldflags=$(OBJDIR)crti.o $(OBJDIR)crtbegin.o $(OBJDIR)lib/libuKernel.a $(OBJDIR)crtend.o $(OBJDIR)crtn.o
 depends=$(OBJDIR)crtbegin.o,$(OBJDIR)crtend.o,$(OBJDIR)crti.o,$(OBJDIR)crtn.o,$(OBJDIR)lib/libuKernel.a,arch/amd64/uKernel.ld,arch/i386/uKernel.ld
 
@@ -39,8 +39,11 @@ depends=arch/amd64/crti.S,arch/i386/crti.S
 [crtn.S]
 depends=arch/amd64/crtn.S,arch/i386/crtn.S
 
+[drivers/bus.c]
+depends=drivers/bus.h,drivers/bus/ioport.c
+
 [drivers/console.c]
-depends=drivers/console/vga.h,drivers/console/vga.c
+depends=drivers/bus.h,drivers/console/vga.h,drivers/console/vga.c
 
 [main.c]
 depends=drivers/console.h

tools/bus.c

@@ -0,0 +1,25 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+#include "drivers/bus.h"
+
+
+/* types */
+struct _Bus
+{
+};
+
+
+/* variables */
+static Bus _bus;
+
+
+/* functions */
+/* bus_init */
+Bus * bus_init(void)
+{
+	return &_bus;
+}

tools/console.c

@@ -26,7 +26,7 @@ static Console _console;
 
 /* functions */
 /* console_init */
-Console * console_init(void)
+Console * console_init(Bus * bus)
 {
 	_console.fd = STDOUT_FILENO;
 	return &_console;

tools/project.conf

@@ -13,7 +13,7 @@ sources=start.S
 
 [uKernel]
 type=binary
-sources=console.c,main.c
+sources=bus.c,console.c,main.c
 ldflags=$(OBJDIR)start.o $(OBJDIR)../src/lib/libuKernel.a `$(CC) -print-libgcc-file-name`
 depends=$(OBJDIR)start.o,$(OBJDIR)../src/lib/libuKernel.a