9 files changed, 919 insertions, 0 deletions

diff --git a/qemu/roms/ipxe/src/interface/linux/linux_console.c b/qemu/roms/ipxe/src/interface/linux/linux_console.c
new file mode 100644
index 000000000..5105eaa94
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_console.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+/** @file
+ *
+ * Linux console implementation.
+ *
+ */
+
+#include <ipxe/console.h>
+
+#include <ipxe/init.h>
+#include <ipxe/keys.h>
+#include <linux_api.h>
+
+#include <linux/termios.h>
+#include <asm/errno.h>
+
+#include <config/console.h>
+
+/* Set default console usage if applicable */
+#if ! ( defined ( CONSOLE_LINUX ) && CONSOLE_EXPLICIT ( CONSOLE_LINUX ) )
+#undef CONSOLE_LINUX
+#define CONSOLE_LINUX ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_LOG )
+#endif
+
+static void linux_console_putchar(int c)
+{
+	/* write to stdout */
+	if (linux_write(1, &c, 1) != 1)
+		DBG("linux_console write failed (%s)\n", linux_strerror(linux_errno));
+}
+
+static int linux_console_getchar()
+{
+	char c;
+
+	/* read from stdin */
+	if (linux_read(0, &c, 1) < 0) {
+		DBG("linux_console read failed (%s)\n", linux_strerror(linux_errno));
+		return 0;
+	}
+	/* backspace seems to be returned as ascii del, map it here */
+	if (c == 0x7f)
+		return KEY_BACKSPACE;
+	else
+		return c;
+}
+
+static int linux_console_iskey()
+{
+	struct pollfd pfd;
+	pfd.fd = 0;
+	pfd.events = POLLIN;
+
+	/* poll for data to be read on stdin */
+	if (linux_poll(&pfd, 1, 0) == -1) {
+		DBG("linux_console poll failed (%s)\n", linux_strerror(linux_errno));
+		return 0;
+	}
+
+	if (pfd.revents & POLLIN)
+		return 1;
+	else
+		return 0;
+}
+
+struct console_driver linux_console __console_driver = {
+	.disabled = 0,
+	.putchar = linux_console_putchar,
+	.getchar = linux_console_getchar,
+	.iskey = linux_console_iskey,
+	.usage = CONSOLE_LINUX,
+};
+
+static int linux_tcgetattr(int fd, struct termios *termios_p)
+{
+	return linux_ioctl(fd, TCGETS, termios_p);
+}
+
+static int linux_tcsetattr(int fd, int optional_actions, const struct termios *termios_p)
+{
+	unsigned long int cmd;
+
+	switch (optional_actions)
+	{
+		case TCSANOW:
+			cmd = TCSETS;
+			break;
+		case TCSADRAIN:
+			cmd = TCSETSW;
+			break;
+		case TCSAFLUSH:
+			cmd = TCSETSF;
+			break;
+		default:
+			linux_errno = EINVAL;
+			return -1;
+	}
+
+	return linux_ioctl(fd, cmd, termios_p);
+}
+
+/** Saved termios attributes */
+static struct termios saved_termios;
+
+/** Setup the terminal for our use */
+static void linux_console_startup(void)
+{
+	struct termios t;
+
+	if (linux_tcgetattr(0, &t)) {
+		DBG("linux_console tcgetattr failed (%s)", linux_strerror(linux_errno));
+		return;
+	}
+
+	saved_termios = t;
+
+	/* Disable canonical mode and echo. Let readline handle that */
+	t.c_lflag &= ~(ECHO | ICANON);
+	/* stop ^C from sending a signal */
+	t.c_cc[VINTR] = 0;
+
+	if (linux_tcsetattr(0, TCSAFLUSH, &t))
+		DBG("linux_console tcsetattr failed (%s)", linux_strerror(linux_errno));
+}
+
+/** Restores original terminal attributes on shutdown */
+static void linux_console_shutdown(int flags __unused)
+{
+	if (linux_tcsetattr(0, TCSAFLUSH, &saved_termios))
+		DBG("linux_console tcsetattr failed (%s)", linux_strerror(linux_errno));
+}
+
+struct startup_fn linux_console_startup_fn __startup_fn(STARTUP_EARLY) = {
+	.startup = linux_console_startup,
+	.shutdown = linux_console_shutdown,
+};
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_entropy.c b/qemu/roms/ipxe/src/interface/linux/linux_entropy.c
new file mode 100644
index 000000000..4671a48da
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_entropy.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * 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 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * Linux entropy source
+ *
+ */
+
+#include <stdint.h>
+#include <errno.h>
+#include <linux_api.h>
+#include <ipxe/entropy.h>
+
+/** Entropy source filename */
+static const char entropy_filename[] = "/dev/random";
+
+/** Entropy source file handle */
+static int entropy_fd;
+
+/**
+ * Enable entropy gathering
+ *
+ * @ret rc		Return status code
+ */
+static int linux_entropy_enable ( void ) {
+
+	/* Open entropy source */
+	entropy_fd = linux_open ( entropy_filename, O_RDONLY );
+	if ( entropy_fd < 0 ) {
+		DBGC ( &entropy_fd, "ENTROPY could not open %s: %s\n",
+		       entropy_filename, linux_strerror ( linux_errno ) );
+		return entropy_fd;
+	}
+
+	return 0;
+}
+
+/**
+ * Disable entropy gathering
+ *
+ */
+static void linux_entropy_disable ( void ) {
+
+	/* Close entropy source */
+	linux_close ( entropy_fd );
+}
+
+/**
+ * Get noise sample
+ *
+ * @ret noise		Noise sample
+ * @ret rc		Return status code
+ */
+static int linux_get_noise ( noise_sample_t *noise ) {
+	uint8_t byte;
+	ssize_t len;
+
+	/* Read a single byte from entropy source */
+	len = linux_read ( entropy_fd, &byte, sizeof ( byte ) );
+	if ( len < 0 ) {
+		DBGC ( &entropy_fd, "ENTROPY could not read from %s: %s\n",
+		       entropy_filename, linux_strerror ( linux_errno ) );
+		return len;
+	}
+	if ( len == 0 ) {
+		DBGC ( &entropy_fd, "ENTROPY EOF on reading from %s: %s\n",
+		       entropy_filename, linux_strerror ( linux_errno ) );
+		return -EPIPE;
+	}
+	*noise = byte;
+
+	return 0;
+}
+
+PROVIDE_ENTROPY_INLINE ( linux, min_entropy_per_sample );
+PROVIDE_ENTROPY ( linux, entropy_enable, linux_entropy_enable );
+PROVIDE_ENTROPY ( linux, entropy_disable, linux_entropy_disable );
+PROVIDE_ENTROPY ( linux, get_noise, linux_get_noise );
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_nap.c b/qemu/roms/ipxe/src/interface/linux/linux_nap.c
new file mode 100644
index 000000000..f1d3cd962
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_nap.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * 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 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.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+#include <ipxe/nap.h>
+
+#include <linux_api.h>
+
+/** @file
+ *
+ * iPXE CPU sleeping API for linux
+ *
+ */
+
+/**
+ * Sleep until next CPU interrupt
+ *
+ */
+static void linux_cpu_nap(void)
+{
+	linux_usleep(0);
+}
+
+PROVIDE_NAP(linux, cpu_nap, linux_cpu_nap);
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_pci.c b/qemu/roms/ipxe/src/interface/linux/linux_pci.c
new file mode 100644
index 000000000..cbd825c18
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_pci.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdio.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <linux_api.h>
+#include <ipxe/linux.h>
+#include <ipxe/pci.h>
+
+/** @file
+ *
+ * iPXE PCI API for Linux
+ *
+ */
+
+/**
+ * Open PCI configuration space
+ *
+ * @v pci		PCI device
+ * @v flags		Access mode flags
+ * @v where		Address within configuration space
+ * @ret fd		File handle, or negative error
+ */
+static int linux_pci_open ( struct pci_device *pci, int flags,
+			    unsigned long where ) {
+	char filename[ 22 /* "/proc/bus/pci/xx/xx.x" + NUL */ ];
+	int fd;
+	int rc;
+
+	/* Construct filename */
+	snprintf ( filename, sizeof ( filename ), "/proc/bus/pci/%02x/%02x.%x",
+		   PCI_BUS ( pci->busdevfn ), PCI_SLOT ( pci->busdevfn ),
+		   PCI_FUNC ( pci->busdevfn ) );
+
+	/* Open file */
+	fd = linux_open ( filename, flags );
+	if ( fd < 0 ) {
+		DBGC ( pci, "PCI could not open %s: %s\n", filename,
+		       linux_strerror ( linux_errno ) );
+		rc = -ELINUX ( linux_errno );
+		goto err_open;
+	}
+
+	/* Seek to location */
+	if ( linux_lseek ( fd, where, SEEK_SET ) < 0 ) {
+		DBGC ( pci, "PCI could not seek to %s offset %#02lx: %s\n",
+		       filename, where, linux_strerror ( linux_errno ) );
+		rc = -ELINUX ( linux_errno );
+		goto err_seek;
+	}
+
+	return fd;
+
+ err_seek:
+	linux_close ( fd );
+ err_open:
+	return rc;
+}
+
+/**
+ * Read from PCI configuration space
+ *
+ * @v pci		PCI device
+ * @v where		Address within configuration space
+ * @v value		Data buffer
+ * @v len		Length to read
+ * @ret rc		Return status code
+ */
+int linux_pci_read ( struct pci_device *pci, unsigned long where,
+		     unsigned long *value, size_t len ) {
+	uint32_t tmp = 0;
+	int fd;
+	int check_len;
+	int rc;
+
+	/* Return "missing device" in case of error */
+	*value = -1UL;
+
+	/* Open configuration space */
+	fd = linux_pci_open ( pci, O_RDONLY, where );
+	if ( fd < 0 ) {
+		rc = fd;
+		goto err_open;
+	}
+
+	/* Read value */
+	check_len = linux_read ( fd, &tmp, len );
+	if ( check_len < 0 ) {
+		DBGC ( pci, "PCI could not read from " PCI_FMT " %#02lx+%#zx: "
+		       "%s\n", PCI_ARGS ( pci ), where, len,
+		       linux_strerror ( linux_errno ) );
+		rc = -ELINUX ( linux_errno );
+		goto err_read;
+	}
+	if ( ( size_t ) check_len != len ) {
+		DBGC ( pci, "PCI read only %#x bytes from " PCI_FMT
+		       " %#02lx+%#zx\n", check_len, PCI_ARGS ( pci ),
+		       where, len );
+		rc = -EIO;
+		goto err_read;
+	}
+
+	/* Return value */
+	*value = le32_to_cpu ( tmp );
+
+	/* Success */
+	rc = 0;
+
+ err_read:
+	linux_close ( fd );
+ err_open:
+	return rc;
+}
+
+/**
+ * Write to PCI configuration space
+ *
+ * @v pci		PCI device
+ * @v where		Address within configuration space
+ * @v value		Value to write
+ * @v len		Length of value
+ * @ret rc		Return status code
+ */
+int linux_pci_write ( struct pci_device *pci, unsigned long where,
+		      unsigned long value, size_t len ) {
+	uint32_t tmp;
+	int fd;
+	int check_len;
+	int rc;
+
+	/* Open configuration space */
+	fd = linux_pci_open ( pci, O_WRONLY, where );
+	if ( fd < 0 ) {
+		rc = fd;
+		goto err_open;
+	}
+
+	/* Prepare value for writing */
+	tmp = cpu_to_le32 ( value );
+	assert ( len <= sizeof ( tmp ) );
+
+	/* Write value */
+	check_len = linux_write ( fd, &tmp, len );
+	if ( check_len < 0 ) {
+		DBGC ( pci, "PCI could not write to " PCI_FMT " %#02lx+%#zx: "
+		       "%s\n", PCI_ARGS ( pci ), where, len,
+		       linux_strerror ( linux_errno ) );
+		rc = -ELINUX ( linux_errno );
+		goto err_write;
+	}
+	if ( ( size_t ) check_len != len ) {
+		DBGC ( pci, "PCI wrote only %#x bytes to " PCI_FMT
+		       " %#02lx+%#zx\n", check_len, PCI_ARGS ( pci ),
+		       where, len );
+		rc = -EIO;
+		goto err_write;
+	}
+
+	/* Success */
+	rc = 0;
+
+ err_write:
+	linux_close ( fd );
+ err_open:
+	return rc;
+}
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_smbios.c b/qemu/roms/ipxe/src/interface/linux/linux_smbios.c
new file mode 100644
index 000000000..6e5174d23
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_smbios.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * 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 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <errno.h>
+#include <linux_api.h>
+#include <ipxe/linux.h>
+#include <ipxe/smbios.h>
+
+/** SMBIOS filename */
+static const char smbios_filename[] = "/dev/mem";
+
+/** SMBIOS entry point scan region start address */
+#define SMBIOS_ENTRY_START 0xf0000
+
+/** SMBIOS entry point scan region length */
+#define SMBIOS_ENTRY_LEN 0x10000
+
+/** SMBIOS mapping alignment */
+#define SMBIOS_ALIGN 0x1000
+
+/**
+ * Find SMBIOS
+ *
+ * @v smbios		SMBIOS entry point descriptor structure to fill in
+ * @ret rc		Return status code
+ */
+static int linux_find_smbios ( struct smbios *smbios ) {
+	struct smbios_entry entry;
+	void *entry_mem;
+	void *smbios_mem;
+	size_t smbios_offset;
+	size_t smbios_indent;
+	size_t smbios_len;
+	int fd;
+	int rc;
+
+	/* Open SMBIOS file */
+	fd = linux_open ( smbios_filename, O_RDONLY );
+	if ( fd < 0 ) {
+		rc = -ELINUX ( linux_errno );
+		DBGC ( smbios, "SMBIOS could not open %s: %s\n",
+		       smbios_filename, linux_strerror ( linux_errno ) );
+		goto err_open;
+	}
+
+	/* Map the region potentially containing the SMBIOS entry point */
+	entry_mem = linux_mmap ( NULL, SMBIOS_ENTRY_LEN, PROT_READ, MAP_SHARED,
+				 fd, SMBIOS_ENTRY_START );
+	if ( entry_mem == MAP_FAILED ) {
+		rc = -ELINUX ( linux_errno );
+		DBGC ( smbios, "SMBIOS could not mmap %s (%#x+%#x): %s\n",
+		       smbios_filename, SMBIOS_ENTRY_START, SMBIOS_ENTRY_LEN,
+		       linux_strerror ( linux_errno ) );
+		goto err_mmap_entry;
+	}
+
+	/* Scan for the SMBIOS entry point */
+	if ( ( rc = find_smbios_entry ( virt_to_user ( entry_mem ),
+					SMBIOS_ENTRY_LEN, &entry ) ) != 0 )
+		goto err_find_entry;
+
+	/* Map the region containing the SMBIOS structures */
+	smbios_indent = ( entry.smbios_address & ( SMBIOS_ALIGN - 1 ) );
+	smbios_offset = ( entry.smbios_address - smbios_indent );
+	smbios_len = ( entry.smbios_len + smbios_indent );
+	smbios_mem = linux_mmap ( NULL, smbios_len, PROT_READ, MAP_SHARED,
+				  fd, smbios_offset );
+	if ( smbios_mem == MAP_FAILED ) {
+		rc = -ELINUX ( linux_errno );
+		DBGC ( smbios, "SMBIOS could not mmap %s (%#zx+%#zx): %s\n",
+		       smbios_filename, smbios_offset, smbios_len,
+		       linux_strerror ( linux_errno ) );
+		goto err_mmap_smbios;
+	}
+
+	/* Fill in entry point descriptor structure */
+	smbios->address = virt_to_user ( smbios_mem + smbios_indent );
+	smbios->len = entry.smbios_len;
+	smbios->count = entry.smbios_count;
+	smbios->version = SMBIOS_VERSION ( entry.major, entry.minor );
+
+	/* Unmap the entry point region (no longer required) */
+	linux_munmap ( entry_mem, SMBIOS_ENTRY_LEN );
+
+	return 0;
+
+	linux_munmap ( smbios_mem, smbios_len );
+ err_mmap_smbios:
+ err_find_entry:
+	linux_munmap ( entry_mem, SMBIOS_ENTRY_LEN );
+ err_mmap_entry:
+	linux_close ( fd );
+ err_open:
+	return rc;
+}
+
+PROVIDE_SMBIOS ( linux, find_smbios, linux_find_smbios );
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_time.c b/qemu/roms/ipxe/src/interface/linux/linux_time.c
new file mode 100644
index 000000000..e3cbafec6
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_time.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * Linux time source
+ *
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <errno.h>
+#include <linux_api.h>
+#include <ipxe/time.h>
+
+/**
+ * Get current time in seconds
+ *
+ * @ret time		Time, in seconds
+ */
+static time_t linux_now ( void ) {
+	struct timeval now;
+
+	linux_gettimeofday ( &now, NULL );
+	return now.tv_sec;
+}
+
+PROVIDE_TIME ( linux, time_now, linux_now );
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_timer.c b/qemu/roms/ipxe/src/interface/linux/linux_timer.c
new file mode 100644
index 000000000..7a994517b
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_timer.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+#include <stddef.h>
+#include <ipxe/timer.h>
+
+#include <linux_api.h>
+
+/** @file
+ *
+ * iPXE timer API for linux
+ *
+ */
+
+/**
+ * Delay for a fixed number of microseconds
+ *
+ * @v usecs		Number of microseconds for which to delay
+ */
+static void linux_udelay(unsigned long usecs)
+{
+	linux_usleep(usecs);
+}
+
+/**
+ * Get number of ticks per second
+ *
+ * @ret ticks_per_sec	Number of ticks per second
+ */
+static unsigned long linux_ticks_per_sec(void)
+{
+	return 1000;
+}
+
+/**
+ * Get current system time in ticks
+ *
+ * linux doesn't provide an easy access to jiffies so implement it by measuring
+ * the time since the first call to this function.
+ *
+ * Since this function is used to seed the (non-cryptographic) random
+ * number generator, we round the start time down to the nearest whole
+ * second.  This minimises the chances of generating identical RNG
+ * sequences (and hence identical TCP port numbers, etc) on
+ * consecutive invocations of iPXE.
+ *
+ * @ret ticks		Current time, in ticks
+ */
+static unsigned long linux_currticks(void)
+{
+	static struct timeval start;
+	static int initialized = 0;
+
+	if (! initialized) {
+		linux_gettimeofday(&start, NULL);
+		initialized = 1;
+	}
+
+	struct timeval now;
+	linux_gettimeofday(&now, NULL);
+
+	unsigned long ticks = (now.tv_sec - start.tv_sec) * linux_ticks_per_sec();
+	ticks += now.tv_usec / (long)(1000000 / linux_ticks_per_sec());
+
+	return ticks;
+}
+
+PROVIDE_TIMER(linux, udelay, linux_udelay);
+PROVIDE_TIMER(linux, currticks, linux_currticks);
+PROVIDE_TIMER(linux, ticks_per_sec, linux_ticks_per_sec);
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_uaccess.c b/qemu/roms/ipxe/src/interface/linux/linux_uaccess.c
new file mode 100644
index 000000000..5ab0b6b65
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_uaccess.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * 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 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.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+#include <ipxe/uaccess.h>
+
+/** @file
+ *
+ * iPXE user access API for linux
+ *
+ */
+
+PROVIDE_UACCESS_INLINE(linux, phys_to_user);
+PROVIDE_UACCESS_INLINE(linux, user_to_phys);
+PROVIDE_UACCESS_INLINE(linux, virt_to_user);
+PROVIDE_UACCESS_INLINE(linux, user_to_virt);
+PROVIDE_UACCESS_INLINE(linux, userptr_add);
+PROVIDE_UACCESS_INLINE(linux, memcpy_user);
+PROVIDE_UACCESS_INLINE(linux, memmove_user);
+PROVIDE_UACCESS_INLINE(linux, memset_user);
+PROVIDE_UACCESS_INLINE(linux, strlen_user);
+PROVIDE_UACCESS_INLINE(linux, memchr_user);
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_umalloc.c b/qemu/roms/ipxe/src/interface/linux/linux_umalloc.c
new file mode 100644
index 000000000..aa0052c53
--- /dev/null
+++ b/qemu/roms/ipxe/src/interface/linux/linux_umalloc.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+#include <valgrind/memcheck.h>
+
+/** @file
+ *
+ * iPXE user memory allocation API for linux
+ *
+ */
+
+#include <assert.h>
+#include <ipxe/umalloc.h>
+
+#include <linux_api.h>
+
+/** Special address returned for empty allocations */
+#define NOWHERE ((void *)-1)
+
+/** Poison to make the metadata more unique */
+#define POISON 0xa5a5a5a5
+#define min(a,b) (((a)<(b))?(a):(b))
+
+/** Metadata stored at the beginning of all allocations */
+struct metadata
+{
+	unsigned poison;
+	size_t size;
+};
+
+#define SIZE_MD (sizeof(struct metadata))
+
+/** Simple realloc which passes most of the work to mmap(), mremap() and munmap() */
+static void * linux_realloc(void *ptr, size_t size)
+{
+	struct metadata md = {0, 0};
+	struct metadata * mdptr = NULL;
+
+	DBG2("linux_realloc(%p, %zd)\n", ptr, size);
+
+	/* Check whether we have a valid pointer */
+	if (ptr != NULL && ptr != NOWHERE) {
+		mdptr = ptr - SIZE_MD;
+		VALGRIND_MAKE_MEM_DEFINED(mdptr, SIZE_MD);
+		md = *mdptr;
+		VALGRIND_MAKE_MEM_NOACCESS(mdptr, SIZE_MD);
+
+		/* Check for poison in the metadata */
+		if (md.poison != POISON) {
+			DBG("linux_realloc bad poison: 0x%x (expected 0x%x)\n", md.poison, POISON);
+			return NULL;
+		}
+	} else {
+		/* Handle NOWHERE as NULL */
+		ptr = NULL;
+	}
+
+	/*
+	 * At this point, ptr is either NULL or pointing to a region allocated by us.
+	 * In the latter case mdptr is pointing to a valid metadata, otherwise it is NULL.
+	 */
+
+	/* Handle deallocation or allocation of size 0 */
+	if (size == 0) {
+		if (mdptr) {
+			if (linux_munmap(mdptr, md.size))
+				DBG("linux_realloc munmap failed: %s\n", linux_strerror(linux_errno));
+			VALGRIND_FREELIKE_BLOCK(ptr, sizeof(*mdptr));
+		}
+		return NOWHERE;
+	}
+
+	if (ptr) {
+		char *vbits = NULL;
+
+		if (RUNNING_ON_VALGRIND > 0)
+			vbits = linux_realloc(NULL, min(size, md.size));
+
+/* prevent an unused variable warning when building w/o valgrind support */
+#ifndef NVALGRIND
+		VALGRIND_GET_VBITS(ptr, vbits, min(size, md.size));
+#endif
+
+		VALGRIND_FREELIKE_BLOCK(ptr, SIZE_MD);
+
+		mdptr = linux_mremap(mdptr, md.size + SIZE_MD, size + SIZE_MD, MREMAP_MAYMOVE);
+		if (mdptr == MAP_FAILED) {
+			DBG("linux_realloc mremap failed: %s\n", linux_strerror(linux_errno));
+			return NULL;
+		}
+		ptr = ((void *)mdptr) + SIZE_MD;
+
+		VALGRIND_MALLOCLIKE_BLOCK(ptr, size, SIZE_MD, 0);
+/* prevent an unused variable warning when building w/o valgrind support */
+#ifndef NVALGRIND
+		VALGRIND_SET_VBITS(ptr, vbits, min(size, md.size));
+#endif
+
+		if (RUNNING_ON_VALGRIND > 0)
+			linux_realloc(vbits, 0);
+	} else {
+		mdptr = linux_mmap(NULL, size + SIZE_MD, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+		if (mdptr == MAP_FAILED) {
+			DBG("linux_realloc mmap failed: %s\n", linux_strerror(linux_errno));
+			return NULL;
+		}
+		ptr = ((void *)mdptr) + SIZE_MD;
+		VALGRIND_MALLOCLIKE_BLOCK(ptr, size, SIZE_MD, 0);
+	}
+
+	/* Update the metadata */
+	VALGRIND_MAKE_MEM_DEFINED(mdptr, SIZE_MD);
+	mdptr->poison = POISON;
+	mdptr->size = size;
+	VALGRIND_MAKE_MEM_NOACCESS(mdptr, SIZE_MD);
+	// VALGRIND_MALLOCLIKE_BLOCK ignores redzones currently, make our own
+	VALGRIND_MAKE_MEM_NOACCESS(ptr + size, SIZE_MD);
+
+	return ptr;
+}
+
+/**
+ * Reallocate external memory
+ *
+ * @v old_ptr		Memory previously allocated by umalloc(), or UNULL
+ * @v new_size		Requested size
+ * @ret new_ptr		Allocated memory, or UNULL
+ *
+ * Calling realloc() with a new size of zero is a valid way to free a
+ * memory block.
+ */
+static userptr_t linux_urealloc(userptr_t old_ptr, size_t new_size)
+{
+	return (userptr_t)linux_realloc((void *)old_ptr, new_size);
+}
+
+PROVIDE_UMALLOC(linux, urealloc, linux_urealloc);