import of edd detection

7 files changed, 1810 insertions, 0 deletions

diff --git a/edd/COPYING b/edd/COPYING
new file mode 100644
index 000000000..0b643ac83
--- /dev/null
+++ b/edd/COPYING
@@ -0,0 +1,483 @@
+
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diff --git a/edd/Makefile b/edd/Makefile
new file mode 100644
index 000000000..63dbcba6c
--- /dev/null
+++ b/edd/Makefile
@@ -0,0 +1,15 @@
+CFLAGS=-Wall -O -g -fpic# -DDEBUG
+
+TARGETS=eddmodule.so
+
+all: $(TARGETS)
+
+edd: lrmi.c edd.c
+	gcc -DDEBUG -o edd lrmi.c edd.c
+
+eddmodule.so: pyedd.c edd.o lrmi.o
+	gcc -c -o pyedd.o -fpic pyedd.c -I/usr/include/python1.5
+	gcc -shared -g -o $@ pyedd.o edd.o lrmi.o
+
+clean:
+	rm -f *.o *.so *~ core
diff --git a/edd/edd.c b/edd/edd.c
new file mode 100644
index 000000000..039301bd6
--- /dev/null
+++ b/edd/edd.c
@@ -0,0 +1,204 @@
+/*
+ * edd.c - real mode bios library for discovering EDD capabilities of
+ *         BIOS drives
+ *
+ * Matt Wilson <msw@redhat.com>
+ *
+ * Copyright 2000 Red Hat, Inc.
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * library public license.
+ *
+ * You should have received a copy of the GNU Library Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <sys/io.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "lrmi.h"
+#include "edd.h"
+
+static int edd_lrmi_initialized = 0;
+
+static int
+edd_lrmi_init (void) {
+  if (edd_lrmi_initialized)
+    return EDD_SUCCESS;
+
+  if (iopl(3)) {
+    fprintf (stderr, "ERROR: failed to set iopl permissions\n");
+    return EDD_ERROR;
+  }
+
+  if (ioperm(0, 0x400, 1)) {
+    fprintf (stderr, "ERROR: failed to set ioperm permissions\n");
+    return EDD_ERROR;
+  }    
+
+  /* Initialize LRMI. */
+  if(LRMI_init() == 1) {
+    edd_lrmi_initialized = 1;
+    return EDD_SUCCESS;
+  }
+
+  fprintf (stderr, "ERROR: failed to initialize lrmi library\n");
+  return EDD_ERROR;
+}
+
+EDDParameters *
+edd_get_parameters (EDDCapability *ec)
+{
+  struct LRMI_regs regs;
+  EDDParameters *ep, *ret;
+
+  if (edd_lrmi_init() == EDD_ERROR) {
+    return NULL;
+  }
+
+  (unsigned char *) ep = LRMI_alloc_real(sizeof(EDDParameters));
+  if (ep == NULL) {
+    return NULL;
+  }
+  
+  memset(ep, 0, sizeof(EDDParameters));
+  memset(&regs, 0, sizeof(regs));
+
+  if (ec->version.major == 3)
+    ep->buffer_size = 0x42;
+  else if (ec->version.major == 2)
+    ep->buffer_size = 0x1e;
+  else
+    ep->buffer_size = 0x1a;
+  
+  regs.eax = 0x4800;
+  regs.edx = ec->drive & 0x00ff;
+  regs.es = ((u_int32_t) ep) >> 4;
+  regs.edi = ((u_int32_t) ep) & 0x0f;
+  
+  printf ("%p -> 0x%x 0x%x\n", ep, regs.es, regs.edi);
+
+  if(LRMI_int(0x13, &regs) == 0) {
+    LRMI_free_real((unsigned char *) ep);
+    return NULL;
+  }
+
+  /* XXX check return */
+  printf ("0x%x\n", regs.eax);
+  printf ("0x%x\n", regs.flags);
+  
+  ret = malloc (sizeof (EDDParameters));
+  if (ret == NULL) {
+    fprintf (stderr, "out of memory\n");
+    abort();
+  }
+  memcpy (ret, ep, sizeof (EDDParameters));
+  LRMI_free_real((unsigned char *) ep);
+
+  return ret;
+}
+
+EDDCapability *
+edd_supported(int drive)
+{
+  struct LRMI_regs regs;
+  
+  if (edd_lrmi_init() == EDD_ERROR) {
+    return NULL;
+  }
+
+  memset(&regs, 0, sizeof(regs));
+  regs.eax = 0x4100;
+  regs.ebx = 0x55aa;
+  regs.edx = drive & 0xff;
+  
+  /* Do it. */
+  if (LRMI_int (0x13, &regs) == 0) {
+    return NULL;
+  }
+  
+  /* Check for successful return. */
+  if(regs.ebx == 0xaa55) {
+    /* Supported, report capabilities */
+    EDDCapability *ec = malloc (sizeof (EDDCapability));
+    memset (ec, 0, sizeof (EDDCapability));
+
+    if (ec == NULL) {
+      fprintf (stderr, "out of memory\n");
+      abort();
+    }
+    
+    if ((regs.eax & 0xff00) == 0x0100) {
+      ec->version.major = 1;
+      ec->version.minor = 0;
+    } else if ((regs.eax & 0xff00) == 0x2000) {
+      ec->version.major = 2;
+      ec->version.minor = 0;
+    } else if ((regs.eax & 0xff00) == 0x2100) {
+      ec->version.major = 2;
+      ec->version.minor = 1;
+    } else if ((regs.eax & 0xff00) == 0x3000) {
+      ec->version.major = 3;
+      ec->version.minor = 0;
+    } else {
+      fprintf (stderr, "WARNING: Unknown EDD version 0x%x supported\n",
+	       regs.eax & 0xff00);
+    }
+    if (regs.ecx & EDD_CAPABILITY_EDA)
+      ec->eda = 1;
+
+    if (regs.ecx & EDD_CAPABILITY_REMOVABLE)
+      ec->removable = 1;
+
+    if (regs.ecx & EDD_CAPABILITY_EDD)
+      ec->edd = 1;
+
+    ec->drive = drive;
+
+    return ec;
+  } else {
+    /* Not supported. */
+    return NULL;
+  }
+}
+
+#ifdef TESTING
+int
+main (void)
+{
+  int i;
+  EDDCapability *ec;
+  EDDParameters *ep;
+  
+  for (i = 0x80; i < 0x90; i++) {
+    if ((ec = edd_supported(i))) {
+      printf ("edd version %d.%d supported on 0x%x\n", ec->version.major, 
+	      ec->version.minor, i);
+      printf ("    extended disk access %s\n",
+	      ec->eda ? "supported" : "not supported");
+      printf ("    removable media functions %s\n",
+	      ec->removable ? "supported" : "not supported");
+      printf ("    edd functions %s\n",
+	      ec->edd ? "supported" : "not supported");
+      ep = edd_get_parameters (ec);
+      if (ep) {
+	printf ("heads: %d   cyl: %d   sec/track: %d\n",
+		ep->heads, ep->cyls, ep->sectors);
+	free (ep);
+      } else
+	printf ("get_parameters call failed\n");
+      free (ec);
+    } else
+      printf ("edd not supported on 0x%x\n", i);
+  }
+
+  return 0;
+}
+#endif
+
+
+
+
diff --git a/edd/edd.h b/edd/edd.h
new file mode 100644
index 000000000..2a21ab2f1
--- /dev/null
+++ b/edd/edd.h
@@ -0,0 +1,66 @@
+/*
+ * edd.h - real mode bios library for discovering EDD capabilities of
+ *         BIOS drives
+ *
+ * Matt Wilson <msw@redhat.com>
+ *
+ * Copyright 2000 Red Hat, Inc.
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * library public license.
+ *
+ * You should have received a copy of the GNU Library Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef __EDD_H__
+#define __EDD_H__
+
+#include <sys/types.h>
+
+#define EDD_ERROR 1
+#define EDD_SUCCESS 0
+
+#define EDD_CAPABILITY_EDA 		1 << 0
+#define EDD_CAPABILITY_REMOVABLE 	1 << 1
+#define EDD_CAPABILITY_EDD		1 << 2
+
+typedef struct EDDParameters_t {
+  u_int16_t buffer_size;
+  u_int16_t info_flags;
+  u_int32_t cyls;
+  u_int32_t heads;
+  u_int32_t sectors;
+  u_int64_t total_sectors;
+  u_int16_t bytes_per_sector;
+  /* -- 2.0+ -- */
+  u_int32_t parameters;
+  /* -- 3.0 -- */
+  u_int16_t path_signature;
+  unsigned char path_length;
+  unsigned char path_reserved[3];
+  unsigned char path_bus[3];  
+  unsigned char path_interface[8];
+  unsigned char path_interface_path[8];
+  unsigned char path_device_path[8];
+  unsigned char tail_reserved;
+  unsigned char checksum;
+} EDDParameters;
+
+typedef struct EDDCapability_t {
+  int drive;
+  struct {
+    int major, minor;
+  } version;
+  int eda : 1;
+  int removable : 1;
+  int edd : 1;
+} EDDCapability;
+
+EDDCapability * edd_supported(int drive);
+EDDParameters * edd_get_parameters (EDDCapability *ec);
+
+
+#endif /* __EDD_H__ */
diff --git a/edd/lrmi.c b/edd/lrmi.c
new file mode 100644
index 000000000..ca8af0a1e
--- /dev/null
+++ b/edd/lrmi.c
@@ -0,0 +1,911 @@
+/*
+Linux Real Mode Interface - A library of DPMI-like functions for Linux.
+
+Copyright (C) 1998 by Josh Vanderhoof
+
+You are free to distribute and modify this file, as long as you
+do not remove this copyright notice and clearly label modified
+versions as being modified.
+
+This software has NO WARRANTY.  Use it at your own risk.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/io.h>
+#include <asm/vm86.h>
+
+#ifdef USE_LIBC_VM86
+#include <sys/vm86.h>
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "lrmi.h"
+
+#define REAL_MEM_BASE 	((void *)0x10000)
+#define REAL_MEM_SIZE 	0x10000
+#define REAL_MEM_BLOCKS 	0x100
+
+struct mem_block
+	{
+	unsigned int size : 20;
+	unsigned int free : 1;
+	};
+
+static struct
+	{
+	int ready;
+	int count;
+	struct mem_block blocks[REAL_MEM_BLOCKS];
+	} mem_info = { 0 };
+
+static int
+real_mem_init(void)
+	{
+	void *m;
+	int fd_zero;
+
+	if (mem_info.ready)
+		return 1;
+
+	fd_zero = open("/dev/zero", O_RDONLY);
+	if (fd_zero == -1)
+		{
+		perror("open /dev/zero");
+		return 0;
+		}
+
+	m = mmap((void *)REAL_MEM_BASE, REAL_MEM_SIZE,
+	 PROT_READ | PROT_WRITE | PROT_EXEC,
+	 MAP_FIXED | MAP_PRIVATE, fd_zero, 0);
+
+	if (m == (void *)-1)
+		{
+		perror("mmap /dev/zero");
+		close(fd_zero);
+		return 0;
+		}
+
+	mem_info.ready = 1;
+	mem_info.count = 1;
+	mem_info.blocks[0].size = REAL_MEM_SIZE;
+	mem_info.blocks[0].free = 1;
+
+	return 1;
+	}
+
+
+static void
+insert_block(int i)
+	{
+	memmove(
+	 mem_info.blocks + i + 1,
+	 mem_info.blocks + i,
+	 (mem_info.count - i) * sizeof(struct mem_block));
+
+	mem_info.count++;
+	}
+
+static void
+delete_block(int i)
+	{
+	mem_info.count--;
+
+	memmove(
+	 mem_info.blocks + i,
+	 mem_info.blocks + i + 1,
+	 (mem_info.count - i) * sizeof(struct mem_block));
+	}
+
+void *
+LRMI_alloc_real(int size)
+	{
+	int i;
+	char *r = (char *)REAL_MEM_BASE;
+
+	if (!mem_info.ready)
+		return NULL;
+
+	if (mem_info.count == REAL_MEM_BLOCKS)
+		return NULL;
+
+	size = (size + 15) & ~15;
+
+	for (i = 0; i < mem_info.count; i++)
+		{
+		if (mem_info.blocks[i].free && size < mem_info.blocks[i].size)
+			{
+			insert_block(i);
+
+			mem_info.blocks[i].size = size;
+			mem_info.blocks[i].free = 0;
+			mem_info.blocks[i + 1].size -= size;
+
+			return (void *)r;
+			}
+
+		r += mem_info.blocks[i].size;
+		}
+
+	return NULL;
+	}
+
+
+void
+LRMI_free_real(void *m)
+	{
+	int i;
+	char *r = (char *)REAL_MEM_BASE;
+
+	if (!mem_info.ready)
+		return;
+
+	i = 0;
+	while (m != (void *)r)
+		{
+		r += mem_info.blocks[i].size;
+		i++;
+		if (i == mem_info.count)
+			return;
+		}
+
+	mem_info.blocks[i].free = 1;
+
+	if (i + 1 < mem_info.count && mem_info.blocks[i + 1].free)
+		{
+		mem_info.blocks[i].size += mem_info.blocks[i + 1].size;
+		delete_block(i + 1);
+		}
+
+	if (i - 1 >= 0 && mem_info.blocks[i - 1].free)
+		{
+		mem_info.blocks[i - 1].size += mem_info.blocks[i].size;
+		delete_block(i);
+		}
+	}
+
+
+#define DEFAULT_VM86_FLAGS 	(IF_MASK | IOPL_MASK)
+#define DEFAULT_STACK_SIZE 	0x1000
+#define RETURN_TO_32_INT 	255
+
+static struct
+	{
+	int ready;
+	unsigned short ret_seg, ret_off;
+	unsigned short stack_seg, stack_off;
+	struct vm86_struct vm;
+	} context = { 0 };
+
+
+static inline void
+set_bit(unsigned int bit, void *array)
+	{
+	unsigned char *a = array;
+
+	a[bit / 8] |= (1 << (bit % 8));
+	}
+
+
+static inline unsigned int
+get_int_seg(int i)
+	{
+	return *(unsigned short *)(i * 4 + 2);
+	}
+
+
+static inline unsigned int
+get_int_off(int i)
+	{
+	return *(unsigned short *)(i * 4);
+	}
+
+
+static inline void
+pushw(unsigned short i)
+	{
+	struct vm86_regs *r = &context.vm.regs;
+	r->esp -= 2;
+	*(unsigned short *)(((unsigned int)r->ss << 4) + r->esp) = i;
+	}
+
+
+int
+LRMI_init(void)
+	{
+	void *m;
+	int fd_mem;
+
+	if (context.ready)
+		return 1;
+
+	if (!real_mem_init())
+		return 0;
+
+	/*
+	 Map the Interrupt Vectors (0x0 - 0x400) + BIOS data (0x400 - 0x502)
+	 and the ROM (0xa0000 - 0x100000)
+	*/
+	fd_mem = open("/dev/mem", O_RDWR);
+
+	if (fd_mem == -1)
+		{
+		perror("open /dev/mem");
+		return 0;
+		}
+
+	m = mmap((void *)0, 0x502,
+	 PROT_READ | PROT_WRITE | PROT_EXEC,
+	 MAP_FIXED | MAP_PRIVATE, fd_mem, 0);
+
+	if (m == (void *)-1)
+		{
+		perror("mmap /dev/mem");
+		return 0;
+		}
+
+	m = mmap((void *)0xa0000, 0x100000 - 0xa0000,
+	 PROT_READ | PROT_WRITE,
+	 MAP_FIXED | MAP_SHARED, fd_mem, 0xa0000);
+
+	if (m == (void *)-1)
+		{
+		perror("mmap /dev/mem");
+		return 0;
+		}
+
+
+	/*
+	 Allocate a stack
+	*/
+	m = LRMI_alloc_real(DEFAULT_STACK_SIZE);
+
+	context.stack_seg = (unsigned int)m >> 4;
+	context.stack_off = DEFAULT_STACK_SIZE;
+
+	/*
+	 Allocate the return to 32 bit routine
+	*/
+	m = LRMI_alloc_real(2);
+
+	context.ret_seg = (unsigned int)m >> 4;
+	context.ret_off = (unsigned int)m & 0xf;
+
+	((unsigned char *)m)[0] = 0xcd; 	/* int opcode */
+	((unsigned char *)m)[1] = RETURN_TO_32_INT;
+
+	memset(&context.vm, 0, sizeof(context.vm));
+
+	/*
+	 Enable kernel emulation of all ints except RETURN_TO_32_INT
+	*/
+	memset(&context.vm.int_revectored, 0, sizeof(context.vm.int_revectored));
+	set_bit(RETURN_TO_32_INT, &context.vm.int_revectored);
+
+	context.ready = 1;
+
+	return 1;
+	}
+
+
+static void
+set_regs(struct LRMI_regs *r)
+	{
+	context.vm.regs.edi = r->edi;
+	context.vm.regs.esi = r->esi;
+	context.vm.regs.ebp = r->ebp;
+	context.vm.regs.ebx = r->ebx;
+	context.vm.regs.edx = r->edx;
+	context.vm.regs.ecx = r->ecx;
+	context.vm.regs.eax = r->eax;
+	context.vm.regs.eflags = DEFAULT_VM86_FLAGS;
+	context.vm.regs.es = r->es;
+	context.vm.regs.ds = r->ds;
+	context.vm.regs.fs = r->fs;
+	context.vm.regs.gs = r->gs;
+	}
+
+
+static void
+get_regs(struct LRMI_regs *r)
+	{
+	r->edi = context.vm.regs.edi;
+	r->esi = context.vm.regs.esi;
+	r->ebp = context.vm.regs.ebp;
+	r->ebx = context.vm.regs.ebx;
+	r->edx = context.vm.regs.edx;
+	r->ecx = context.vm.regs.ecx;
+	r->eax = context.vm.regs.eax;
+	r->flags = context.vm.regs.eflags;
+	r->es = context.vm.regs.es;
+	r->ds = context.vm.regs.ds;
+	r->fs = context.vm.regs.fs;
+	r->gs = context.vm.regs.gs;
+	}
+
+#define DIRECTION_FLAG 	(1 << 10)
+
+static void
+em_ins(int size)
+	{
+	unsigned int edx, edi;
+
+	edx = context.vm.regs.edx & 0xffff;
+	edi = context.vm.regs.edi & 0xffff;
+	edi += (unsigned int)context.vm.regs.ds << 4;
+
+	if (context.vm.regs.eflags & DIRECTION_FLAG)
+		{
+		if (size == 4)
+			asm volatile ("std; insl; cld"
+			 : "=D" (edi) : "d" (edx), "0" (edi));
+		else if (size == 2)
+			asm volatile ("std; insw; cld"
+			 : "=D" (edi) : "d" (edx), "0" (edi));
+		else
+			asm volatile ("std; insb; cld"
+			 : "=D" (edi) : "d" (edx), "0" (edi));
+		}
+	else
+		{
+		if (size == 4)
+			asm volatile ("cld; insl"
+			 : "=D" (edi) : "d" (edx), "0" (edi));
+		else if (size == 2)
+			asm volatile ("cld; insw"
+			 : "=D" (edi) : "d" (edx), "0" (edi));
+		else
+			asm volatile ("cld; insb"
+			 : "=D" (edi) : "d" (edx), "0" (edi));
+		}
+
+	edi -= (unsigned int)context.vm.regs.ds << 4;
+
+	context.vm.regs.edi &= 0xffff0000;
+	context.vm.regs.edi |= edi & 0xffff;
+	}
+
+static void
+em_rep_ins(int size)
+	{
+	unsigned int ecx, edx, edi;
+
+	ecx = context.vm.regs.ecx & 0xffff;
+	edx = context.vm.regs.edx & 0xffff;
+	edi = context.vm.regs.edi & 0xffff;
+	edi += (unsigned int)context.vm.regs.ds << 4;
+
+	if (context.vm.regs.eflags & DIRECTION_FLAG)
+		{
+		if (size == 4)
+			asm volatile ("std; rep; insl; cld"
+			 : "=D" (edi), "=c" (ecx)
+			 : "d" (edx), "0" (edi), "1" (ecx));
+		else if (size == 2)
+			asm volatile ("std; rep; insw; cld"
+			 : "=D" (edi), "=c" (ecx)
+			 : "d" (edx), "0" (edi), "1" (ecx));
+		else
+			asm volatile ("std; rep; insb; cld"
+			 : "=D" (edi), "=c" (ecx)
+			 : "d" (edx), "0" (edi), "1" (ecx));
+		}
+	else
+		{
+		if (size == 4)
+			asm volatile ("cld; rep; insl"
+			 : "=D" (edi), "=c" (ecx)
+			 : "d" (edx), "0" (edi), "1" (ecx));
+		else if (size == 2)
+			asm volatile ("cld; rep; insw"
+			 : "=D" (edi), "=c" (ecx)
+			 : "d" (edx), "0" (edi), "1" (ecx));
+		else
+			asm volatile ("cld; rep; insb"
+			 : "=D" (edi), "=c" (ecx)
+			 : "d" (edx), "0" (edi), "1" (ecx));
+		}
+
+	edi -= (unsigned int)context.vm.regs.ds << 4;
+
+	context.vm.regs.edi &= 0xffff0000;
+	context.vm.regs.edi |= edi & 0xffff;
+
+	context.vm.regs.ecx &= 0xffff0000;
+	context.vm.regs.ecx |= ecx & 0xffff;
+	}
+
+static void
+em_outs(int size)
+	{
+	unsigned int edx, esi;
+
+	edx = context.vm.regs.edx & 0xffff;
+	esi = context.vm.regs.esi & 0xffff;
+	esi += (unsigned int)context.vm.regs.ds << 4;
+
+	if (context.vm.regs.eflags & DIRECTION_FLAG)
+		{
+		if (size == 4)
+			asm volatile ("std; outsl; cld"
+			 : "=S" (esi) : "d" (edx), "0" (esi));
+		else if (size == 2)
+			asm volatile ("std; outsw; cld"
+			 : "=S" (esi) : "d" (edx), "0" (esi));
+		else
+			asm volatile ("std; outsb; cld"
+			 : "=S" (esi) : "d" (edx), "0" (esi));
+		}
+	else
+		{
+		if (size == 4)
+			asm volatile ("cld; outsl"
+			 : "=S" (esi) : "d" (edx), "0" (esi));
+		else if (size == 2)
+			asm volatile ("cld; outsw"
+			 : "=S" (esi) : "d" (edx), "0" (esi));
+		else
+			asm volatile ("cld; outsb"
+			 : "=S" (esi) : "d" (edx), "0" (esi));
+		}
+
+	esi -= (unsigned int)context.vm.regs.ds << 4;
+
+	context.vm.regs.esi &= 0xffff0000;
+	context.vm.regs.esi |= esi & 0xffff;
+	}
+
+static void
+em_rep_outs(int size)
+	{
+	unsigned int ecx, edx, esi;
+
+	ecx = context.vm.regs.ecx & 0xffff;
+	edx = context.vm.regs.edx & 0xffff;
+	esi = context.vm.regs.esi & 0xffff;
+	esi += (unsigned int)context.vm.regs.ds << 4;
+
+	if (context.vm.regs.eflags & DIRECTION_FLAG)
+		{
+		if (size == 4)
+			asm volatile ("std; rep; outsl; cld"
+			 : "=S" (esi), "=c" (ecx)
+			 : "d" (edx), "0" (esi), "1" (ecx));
+		else if (size == 2)
+			asm volatile ("std; rep; outsw; cld"
+			 : "=S" (esi), "=c" (ecx)
+			 : "d" (edx), "0" (esi), "1" (ecx));
+		else
+			asm volatile ("std; rep; outsb; cld"
+			 : "=S" (esi), "=c" (ecx)
+			 : "d" (edx), "0" (esi), "1" (ecx));
+		}
+	else
+		{
+		if (size == 4)
+			asm volatile ("cld; rep; outsl"
+			 : "=S" (esi), "=c" (ecx)
+			 : "d" (edx), "0" (esi), "1" (ecx));
+		else if (size == 2)
+			asm volatile ("cld; rep; outsw"
+			 : "=S" (esi), "=c" (ecx)
+			 : "d" (edx), "0" (esi), "1" (ecx));
+		else
+			asm volatile ("cld; rep; outsb"
+			 : "=S" (esi), "=c" (ecx)
+			 : "d" (edx), "0" (esi), "1" (ecx));
+		}
+
+	esi -= (unsigned int)context.vm.regs.ds << 4;
+
+	context.vm.regs.esi &= 0xffff0000;
+	context.vm.regs.esi |= esi & 0xffff;
+
+	context.vm.regs.ecx &= 0xffff0000;
+	context.vm.regs.ecx |= ecx & 0xffff;
+	}
+
+static void
+em_inbl(unsigned char literal)
+	{
+	context.vm.regs.eax = inb(literal) & 0xff;
+	}
+
+static void
+em_inb(void)
+	{
+	asm volatile ("inb (%w1), %b0"
+	 : "=a" (context.vm.regs.eax)
+	 : "d" (context.vm.regs.edx), "0" (context.vm.regs.eax));
+	}
+
+static void
+em_inw(void)
+	{
+	asm volatile ("inw (%w1), %w0"
+	 : "=a" (context.vm.regs.eax)
+	 : "d" (context.vm.regs.edx), "0" (context.vm.regs.eax));
+	}
+
+static void
+em_inl(void)
+	{
+	asm volatile ("inl (%w1), %0"
+	 : "=a" (context.vm.regs.eax)
+	 : "d" (context.vm.regs.edx));
+	}
+
+static void
+em_outbl(unsigned char literal)
+	{
+	outb(context.vm.regs.eax & 0xff, literal);
+	}
+
+static void
+em_outb(void)
+	{
+	asm volatile ("outb %b0, (%w1)"
+	 : : "a" (context.vm.regs.eax),
+	 "d" (context.vm.regs.edx));
+	}
+
+static void
+em_outw(void)
+	{
+	asm volatile ("outw %w0, (%w1)"
+	 : : "a" (context.vm.regs.eax),
+	 "d" (context.vm.regs.edx));
+	}
+
+static void
+em_outl(void)
+	{
+	asm volatile ("outl %0, (%w1)"
+	 : : "a" (context.vm.regs.eax),
+	 "d" (context.vm.regs.edx));
+	}
+
+static int
+emulate(void)
+	{
+	unsigned char *insn;
+	struct
+		{
+		unsigned int size : 1;
+		unsigned int rep : 1;
+		} prefix = { 0, 0 };
+	int i = 0;
+
+	insn = (unsigned char *)((unsigned int)context.vm.regs.cs << 4);
+	insn += context.vm.regs.eip;
+
+	while (1)
+		{
+		if (insn[i] == 0x66)
+			{
+			prefix.size = 1 - prefix.size;
+			i++;
+			}
+		else if (insn[i] == 0xf3)
+			{
+			prefix.rep = 1;
+			i++;
+			}
+		else if (insn[i] == 0xf0 || insn[i] == 0xf2
+		 || insn[i] == 0x26 || insn[i] == 0x2e
+		 || insn[i] == 0x36 || insn[i] == 0x3e
+		 || insn[i] == 0x64 || insn[i] == 0x65
+		 || insn[i] == 0x67)
+			{
+			/* these prefixes are just ignored */
+			i++;
+			}
+		else if (insn[i] == 0x6c)
+			{
+			if (prefix.rep)
+				em_rep_ins(1);
+			else
+				em_ins(1);
+			i++;
+			break;
+			}
+		else if (insn[i] == 0x6d)
+			{
+			if (prefix.rep)
+				{
+				if (prefix.size)
+					em_rep_ins(4);
+				else
+					em_rep_ins(2);
+				}
+			else
+				{
+				if (prefix.size)
+					em_ins(4);
+				else
+					em_ins(2);
+				}
+			i++;
+			break;
+			}
+		else if (insn[i] == 0x6e)
+			{
+			if (prefix.rep)
+				em_rep_outs(1);
+			else
+				em_outs(1);
+			i++;
+			break;
+			}
+		else if (insn[i] == 0x6f)
+			{
+			if (prefix.rep)
+				{
+				if (prefix.size)
+					em_rep_outs(4);
+				else
+					em_rep_outs(2);
+				}
+			else
+				{
+				if (prefix.size)
+					em_outs(4);
+				else
+					em_outs(2);
+				}
+			i++;
+			break;
+			}
+		else if (insn[i] == 0xe4)
+			{
+			em_inbl(insn[i + 1]);
+			i += 2;
+			break;
+			}
+		else if (insn[i] == 0xe6)
+			{
+			em_outbl(insn[i + 1]);
+			i += 2;
+			break;
+			}
+		else if (insn[i] == 0xec)
+			{
+			em_inb();
+			i++;
+			break;
+			}
+		else if (insn[i] == 0xed)
+			{
+			if (prefix.size)
+				em_inl();
+			else
+				em_inw();
+			i++;
+			break;
+			}
+		else if (insn[i] == 0xee)
+			{
+			em_outb();
+			i++;
+			break;
+			}
+		else if (insn[i] == 0xef)
+			{
+			if (prefix.size)
+				em_outl();
+			else
+				em_outw();
+
+			i++;
+			break;
+			}
+		else
+			return 0;
+		}
+
+	context.vm.regs.eip += i;
+	return 1;
+	}
+
+
+/*
+ I don't know how to make sure I get the right vm86() from libc.
+ The one I want is syscall # 113 (vm86old() in libc 5, vm86() in glibc)
+ which should be declared as "int vm86(struct vm86_struct *);" in
+ <sys/vm86.h>.
+
+ This just does syscall 113 with inline asm, which should work
+ for both libc's (I hope).
+*/
+#if !defined(USE_LIBC_VM86)
+static int
+lrmi_vm86(struct vm86_struct *vm)
+	{
+	int r;
+#ifdef __PIC__
+	asm volatile (
+	 "pushl %%ebx\n\t"
+	 "movl %2, %%ebx\n\t"
+	 "int $0x80\n\t"
+	 "popl %%ebx"
+	 : "=a" (r)
+	 : "0" (113), "r" (vm));
+#else
+	asm volatile (
+	 "int $0x80"
+	 : "=a" (r)
+	 : "0" (113), "b" (vm));
+#endif
+	return r;
+	}
+#else
+#define lrmi_vm86 vm86
+#endif
+
+
+static void
+debug_info(int vret)
+	{
+	int i;
+	unsigned char *p;
+
+	fputs("vm86() failed\n", stderr);
+	fprintf(stderr, "return = 0x%x\n", vret);
+	fprintf(stderr, "eax = 0x%08lx\n", context.vm.regs.eax);
+	fprintf(stderr, "ebx = 0x%08lx\n", context.vm.regs.ebx);
+	fprintf(stderr, "ecx = 0x%08lx\n", context.vm.regs.ecx);
+	fprintf(stderr, "edx = 0x%08lx\n", context.vm.regs.edx);
+	fprintf(stderr, "esi = 0x%08lx\n", context.vm.regs.esi);
+	fprintf(stderr, "edi = 0x%08lx\n", context.vm.regs.edi);
+	fprintf(stderr, "ebp = 0x%08lx\n", context.vm.regs.ebp);
+	fprintf(stderr, "eip = 0x%08lx\n", context.vm.regs.eip);
+	fprintf(stderr, "cs  = 0x%04x\n", context.vm.regs.cs);
+	fprintf(stderr, "esp = 0x%08lx\n", context.vm.regs.esp);
+	fprintf(stderr, "ss  = 0x%04x\n", context.vm.regs.ss);
+	fprintf(stderr, "ds  = 0x%04x\n", context.vm.regs.ds);
+	fprintf(stderr, "es  = 0x%04x\n", context.vm.regs.es);
+	fprintf(stderr, "fs  = 0x%04x\n", context.vm.regs.fs);
+	fprintf(stderr, "gs  = 0x%04x\n", context.vm.regs.gs);
+	fprintf(stderr, "eflags  = 0x%08lx\n", context.vm.regs.eflags);
+
+	fputs("cs:ip = [ ", stderr);
+
+	p = (unsigned char *)((context.vm.regs.cs << 4) + (context.vm.regs.eip & 0xffff));
+
+	for (i = 0; i < 16; ++i)
+		fprintf(stderr, "%02x ", (unsigned int)p[i]);
+
+	fputs("]\n", stderr);
+	}
+
+
+static int
+run_vm86(void)
+	{
+	unsigned int vret;
+
+	while (1)
+		{
+		vret = lrmi_vm86(&context.vm);
+
+		if (VM86_TYPE(vret) == VM86_INTx)
+			{
+			unsigned int v = VM86_ARG(vret);
+
+			if (v == RETURN_TO_32_INT)
+				return 1;
+
+			pushw(context.vm.regs.eflags);
+			pushw(context.vm.regs.cs);
+			pushw(context.vm.regs.eip);
+
+			context.vm.regs.cs = get_int_seg(v);
+			context.vm.regs.eip = get_int_off(v);
+			context.vm.regs.eflags &= ~(VIF_MASK | TF_MASK);
+
+			continue;
+			}
+
+		if (VM86_TYPE(vret) != VM86_UNKNOWN)
+			break;
+
+		if (!emulate())
+			break;
+		}
+
+#ifdef ORIGINAL_LRMI_CODE_THAT_GOT_IFDEFED_OUT
+	debug_info(vret);
+#endif
+	return 0;
+	}
+
+
+int
+LRMI_call(struct LRMI_regs *r)
+	{
+	unsigned int vret;
+
+	memset(&context.vm.regs, 0, sizeof(context.vm.regs));
+
+	set_regs(r);
+
+	context.vm.regs.cs = r->cs;
+	context.vm.regs.eip = r->ip;
+
+	if (r->ss == 0 && r->sp == 0)
+		{
+		context.vm.regs.ss = context.stack_seg;
+		context.vm.regs.esp = context.stack_off;
+		}
+	else
+		{
+		context.vm.regs.ss = r->ss;
+		context.vm.regs.esp = r->sp;
+		}
+
+	pushw(context.ret_seg);
+	pushw(context.ret_off);
+
+	vret = run_vm86();
+
+	get_regs(r);
+
+	return vret;
+	}
+
+
+int
+LRMI_int(int i, struct LRMI_regs *r)
+	{
+	unsigned int vret;
+	unsigned int seg, off;
+
+	seg = get_int_seg(i);
+	off = get_int_off(i);
+
+	/*
+	 If the interrupt is in regular memory, it's probably
+	 still pointing at a dos TSR (which is now gone).
+	*/
+	if (seg < 0xa000 || (seg << 4) + off >= 0x100000)
+		{
+#ifdef ORIGINAL_LRMI_CODE_THAT_GOT_IFDEFED_OUT
+		fprintf(stderr, "Int 0x%x is not in rom (%04x:%04x)\n", i, seg, off);
+#endif
+		return 0;
+		}
+
+	memset(&context.vm.regs, 0, sizeof(context.vm.regs));
+
+	set_regs(r);
+
+	context.vm.regs.cs = seg;
+	context.vm.regs.eip = off;
+
+	if (r->ss == 0 && r->sp == 0)
+		{
+		context.vm.regs.ss = context.stack_seg;
+		context.vm.regs.esp = context.stack_off;
+		}
+	else
+		{
+		context.vm.regs.ss = r->ss;
+		context.vm.regs.esp = r->sp;
+		}
+
+	pushw(DEFAULT_VM86_FLAGS);
+	pushw(context.ret_seg);
+	pushw(context.ret_off);
+
+	vret = run_vm86();
+
+	get_regs(r);
+
+	return vret;
+	}
+
diff --git a/edd/lrmi.h b/edd/lrmi.h
new file mode 100644
index 000000000..c9c186365
--- /dev/null
+++ b/edd/lrmi.h
@@ -0,0 +1,85 @@
+/*
+Linux Real Mode Interface - A library of DPMI-like functions for Linux.
+
+Copyright (C) 1998 by Josh Vanderhoof
+
+You are free to distribute and modify this file, as long as you
+do not remove this copyright notice and clearly label modified
+versions as being modified.
+
+This software has NO WARRANTY.  Use it at your own risk.
+*/
+
+#ifndef LRMI_H
+#define LRMI_H
+
+struct LRMI_regs
+	{
+	unsigned int edi;
+	unsigned int esi;
+	unsigned int ebp;
+	unsigned int reserved;
+	unsigned int ebx;
+	unsigned int edx;
+	unsigned int ecx;
+	unsigned int eax;
+	unsigned short int flags;
+	unsigned short int es;
+	unsigned short int ds;
+	unsigned short int fs;
+	unsigned short int gs;
+	unsigned short int ip;
+	unsigned short int cs;
+	unsigned short int sp;
+	unsigned short int ss;
+	};
+
+
+#ifndef LRMI_PREFIX
+#define LRMI_PREFIX LRMI_
+#endif
+
+#define LRMI_CONCAT2(a, b) 	a ## b
+#define LRMI_CONCAT(a, b) 	LRMI_CONCAT2(a, b)
+#define LRMI_MAKENAME(a) 	LRMI_CONCAT(LRMI_PREFIX, a)
+
+/*
+ Initialize
+ returns 1 if sucessful, 0 for failure
+*/
+#define LRMI_init LRMI_MAKENAME(init)
+int
+LRMI_init(void);
+
+/*
+ Simulate a 16 bit far call
+ returns 1 if sucessful, 0 for failure
+*/
+#define LRMI_call LRMI_MAKENAME(call)
+int
+LRMI_call(struct LRMI_regs *r);
+
+/*
+ Simulate a 16 bit interrupt
+ returns 1 if sucessful, 0 for failure
+*/
+#define LRMI_int LRMI_MAKENAME(int)
+int
+LRMI_int(int interrupt, struct LRMI_regs *r);
+
+/*
+ Allocate real mode memory
+ The returned block is paragraph (16 byte) aligned
+*/
+#define LRMI_alloc_real LRMI_MAKENAME(alloc_real)
+void *
+LRMI_alloc_real(int size);
+
+/*
+ Free real mode memory
+*/
+#define LRMI_free_real LRMI_MAKENAME(free_real)
+void
+LRMI_free_real(void *m);
+
+#endif
diff --git a/edd/pyedd.c b/edd/pyedd.c
new file mode 100644
index 000000000..a0d845caf
--- /dev/null
+++ b/edd/pyedd.c
@@ -0,0 +1,46 @@
+/*
+ * pyedd.c - real mode bios library for discovering EDD capabilities of
+ *           BIOS drives
+ *
+ * Matt Wilson <msw@redhat.com>
+ *
+ * Copyright 2000 Red Hat, Inc.
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * library public license.
+ *
+ * You should have received a copy of the GNU Library Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include "edd.h"
+
+#include <Python.h>
+
+static PyObject * edd_py_detect (PyObject * s, PyObject * args);
+
+static PyMethodDef edd_module_methods[] = {
+  { "detect",  (PyCFunction) edd_py_detect, METH_VARARGS, NULL },
+  { NULL }
+};
+
+static PyObject *
+edd_py_detect (PyObject * s, PyObject * args) {
+  int device = 0x80;
+  EDDCapability *ec;
+
+  if (!PyArg_ParseTuple(args, "|i", &device))
+    return NULL;
+
+  if ((ec = edd_supported(device))) {
+    free (ec);
+    return Py_BuildValue ("i", 1);
+  }
+  return Py_BuildValue ("i", 0);
+}
+
+void initedd (void) {
+    Py_InitModule("edd", edd_module_methods);
+}