1 files changed, 108 insertions, 0 deletions
diff --git a/roms/ipxe/src/arch/i386/interface/pcbios/apm.c b/roms/ipxe/src/arch/i386/interface/pcbios/apm.c
new file mode 100644
index 00000000..3b13e1cd
--- /dev/null
+++ b/roms/ipxe/src/arch/i386/interface/pcbios/apm.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2013 Marin Hannache <ipxe@mareo.fr>.
+ *
+ * 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
+ *
+ * Advanced Power Management
+ *
+ */
+
+#include <errno.h>
+#include <realmode.h>
+#include <ipxe/reboot.h>
+
+/**
+ * Power off the computer using APM
+ *
+ * @ret rc		Return status code
+ */
+static int apm_poweroff ( void ) {
+	uint16_t apm_version;
+	uint16_t apm_signature;
+	uint16_t apm_flags;
+	uint16_t carry;
+
+	/* APM check */
+	__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t"
+	                                   "adc %%edx,0\n\t" )
+	                       : "=a" ( apm_version ), "=b" ( apm_signature ),
+                                 "=c" ( apm_flags ), "=d" ( carry )
+	                       : "a" ( 0x5300 ), "b" ( 0x0000 ),
+				 "d" ( 0x0000 ) );
+	if ( carry ) {
+		DBG ( "APM not present\n" );
+		return -ENOTSUP;
+	}
+	if ( apm_signature != 0x504d ) { /* signature 'PM' */
+		DBG ( "APM not present\n" );
+		return -ENOTSUP;
+	}
+	if ( apm_version < 0x0101 ) { /* Need version 1.1+ */
+		DBG ( "APM 1.1+ not supported\n" );
+		return -ENOTSUP;
+	}
+	if ( ( apm_flags & 0x8 ) == 0x8 ) {
+		DBG ( "APM power management disabled\n" );
+		return -EPERM;
+	}
+	DBG2 ( "APM check completed\n" );
+
+	/* APM initialisation */
+	__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t"
+	                                   "adc %%edx,0\n\t" )
+	                       : "=d" ( carry )
+	                       : "a" ( 0x5301 ), "b" ( 0x0000 ),
+	                         "d" ( 0x0000 ) );
+	if ( carry ) {
+		DBG ( "APM initialisation failed\n" );
+		return -EIO;
+	}
+	DBG2 ( "APM initialisation completed\n" );
+
+	/* Set APM driver version */
+	__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t"
+	                                   "adc %%edx,0\n\t" )
+	                       : "=d" ( carry )
+	                       : "a" ( 0x530e ), "b" ( 0x0000 ),
+	                         "c" ( 0x0101 ), "d" ( 0x0000 ) );
+	if ( carry ) {
+		DBG ( "APM setting driver version failed\n" );
+		return -EIO;
+	}
+	DBG2 ( "APM driver version set\n" );
+
+	/* Setting power state to off */
+	__asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t"
+	                                   "adc %%edx,0\n\t" )
+	                       : "=d" ( carry )
+	                       : "a" ( 0x5307 ), "b" ( 0x0001 ),
+	                         "c" ( 0x0003 ), "d" ( 0x0000) );
+	if ( carry ) {
+		DBG ( "APM setting power state failed\n" );
+		return -ENOTTY;
+	}
+
+	/* Should never happen */
+	return -ECANCELED;
+}
+
+PROVIDE_REBOOT ( pcbios, poweroff, apm_poweroff );