[freeldr] Add PXE "filesystem"

svn path=/trunk/; revision=51517

Author: hpoussin

reactos/boot/freeldr/freeldr/arch/i386/i386pxe.S

@@ -0,0 +1,97 @@
+/*
+ *  FreeLoader
+ *  Copyright (C) 2011  Hervé Poussineau
+ *
+ *  This program 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 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+	.text
+	.code16
+
+#define ASM
+
+#include <arch.h>
+
+/*
+ * U16 PxeCallApi(U16 Segment, U16 Offset, U16 Service, VOID *Parameter);
+ *
+ * RETURNS:
+ */
+_pxe_function:
+	.word	0
+_pxe_entry_point:
+	.long	0
+_pxe_buffer_segment:
+	.word0
+_pxe_buffer_offset:
+	.word0
+_pxe_result:
+	.word	0
+
+EXTERN(_PxeCallApi)
+	.code32
+	pushl	%ebp
+	movl	%esp,%ebp
+
+	pushal
+	push	%es
+
+	/* copy entry point */
+	movl	0x08(%ebp),%eax
+	shll	$16,%eax
+	movw	0x0C(%ebp),%ax
+	movl	%eax,_pxe_entry_point
+
+	/* copy function */
+	movw	0x10(%ebp),%ax
+	movw	%ax,_pxe_function
+
+	/* convert pointer to data buffer to segment/offset */
+	movl	0x14(%ebp),%eax
+	shrl	$4,%eax
+	andl	$0xf000,%eax
+	movw	%ax,_pxe_buffer_segment
+	movl	0x14(%ebp),%eax
+	andl	$0xffff,%eax
+	movw	%ax,_pxe_buffer_offset
+
+	call	switch_to_real
+	.code16
+
+	movw	_pxe_buffer_segment,%ax
+	push	%ax
+	movw	_pxe_buffer_offset,%ax
+	push	%ax
+	movw	_pxe_function,%ax
+	push	%ax
+	lcall	*_pxe_entry_point
+	addw	$6,%sp
+	movw	%ax,_pxe_result
+
+	call	switch_to_prot
+	.code32
+
+	pop	%es
+	popal
+
+	movl	%ebp,%esp
+	popl	%ebp
+
+	movw	_pxe_result,%ax
+
+	ret
+
+/* EOF */
+

reactos/boot/freeldr/freeldr/arch/i386/machpc.c

@@ -43,7 +43,7 @@ PcMachInit(const char *CmdLine)
     MachVtbl.Beep = PcBeep;
     MachVtbl.PrepareForReactOS = PcPrepareForReactOS;
     MachVtbl.GetMemoryMap = PcMemGetMemoryMap;
-    MachVtbl.DiskGetBootPath = DiskGetBootPath;
+    MachVtbl.DiskGetBootPath = PcDiskGetBootPath;
     MachVtbl.DiskReadLogicalSectors = PcDiskReadLogicalSectors;
     MachVtbl.DiskGetDriveGeometry = PcDiskGetDriveGeometry;
     MachVtbl.DiskGetCacheableBlockCount = PcDiskGetCacheableBlockCount;

reactos/boot/freeldr/freeldr/arch/i386/pcdisk.c

@@ -367,4 +367,15 @@ PcDiskGetCacheableBlockCount(ULONG DriveNumber)
     }
 }
 
+BOOLEAN
+PcDiskGetBootPath(char *BootPath, unsigned Size)
+{
+  if (PxeInit())
+    {
+      strcpy(BootPath, "net(0)");
+      return 0;
+    }
+  return DiskGetBootPath(BootPath, Size);
+}
+
 /* EOF */

reactos/boot/freeldr/freeldr/freeldr_base.rbuild

@@ -33,6 +33,7 @@
 		<file>fs.c</file>
 		<file>iso.c</file>
 		<file>ntfs.c</file>
+		<file>pxe.c</file>
 	</directory>
 	<directory name="inifile">
 		<file>ini_init.c</file>

reactos/boot/freeldr/freeldr/freeldr_base64k.rbuild

@@ -12,6 +12,7 @@
 				<file>i386cpu.S</file>
 				<file>i386idt.S</file>
 				<file>i386pnp.S</file>
+				<file>i386pxe.S</file>
 				<file>i386trap.S</file>
 				<file>int386.S</file>
 				<file>linux.S</file>

reactos/boot/freeldr/freeldr/fs/fs.c

@@ -338,6 +338,10 @@ LONG ArcOpen(CHAR* Path, OPENMODE OpenMode, ULONG* FileId)
                     FileData[DeviceId].FileFuncTable = NtfsMount(DeviceId);
                 if (!FileData[DeviceId].FileFuncTable)
                     FileData[DeviceId].FileFuncTable = Ext2Mount(DeviceId);
+#endif
+#ifdef _M_IX86
+                if (!FileData[DeviceId].FileFuncTable)
+                    FileData[DeviceId].FileFuncTable = PxeMount(DeviceId);
 #endif
                 if (!FileData[DeviceId].FileFuncTable)
                 {