summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/arch/x86/include/arch/ebda.h37
-rw-r--r--src/arch/x86/lib/Makefile.inc1
-rw-r--r--src/arch/x86/lib/ebda.c48
-rw-r--r--src/devices/device.c8
-rw-r--r--src/devices/oprom/x86.c16
5 files changed, 94 insertions, 16 deletions
diff --git a/src/arch/x86/include/arch/ebda.h b/src/arch/x86/include/arch/ebda.h
new file mode 100644
index 0000000000..1de609799d
--- /dev/null
+++ b/src/arch/x86/include/arch/ebda.h
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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; version 2 of
+ * the License.
+ *
+ * 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
+ */
+
+#ifndef __ARCH_EBDA_H
+#define __ARCH_EBDA_H
+
+#define X86_BDA_SIZE 0x200
+#define X86_BDA_BASE 0x400
+#define X86_EBDA_SEGMENT 0x40e
+#define X86_EBDA_LOWMEM 0x413
+
+#define DEFAULT_EBDA_LOWMEM (1024 << 10)
+#define DEFAULT_EBDA_SEGMENT 0xF600
+#define DEFAULT_EBDA_SIZE 0x400
+
+void setup_ebda(u32 low_memory_size, u16 ebda_segment, u16 ebda_size);
+void setup_default_ebda(void);
+
+#endif
diff --git a/src/arch/x86/lib/Makefile.inc b/src/arch/x86/lib/Makefile.inc
index 96fb9b07f5..8f5fd5f1eb 100644
--- a/src/arch/x86/lib/Makefile.inc
+++ b/src/arch/x86/lib/Makefile.inc
@@ -8,6 +8,7 @@ ramstage-y += exception.c
ramstage-$(CONFIG_IOAPIC) += ioapic.c
ramstage-y += memset.c
ramstage-y += memcpy.c
+ramstage-y += ebda.c
romstage-y += romstage_console.c
romstage-y += cbfs_and_run.c
diff --git a/src/arch/x86/lib/ebda.c b/src/arch/x86/lib/ebda.c
new file mode 100644
index 0000000000..faf1451a2f
--- /dev/null
+++ b/src/arch/x86/lib/ebda.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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; version 2 of
+ * the License.
+ *
+ * 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
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <arch/io.h>
+#include <arch/ebda.h>
+
+void setup_ebda(u32 low_memory_size, u16 ebda_segment, u16 ebda_size)
+{
+ if (!low_memory_size || !ebda_segment || !ebda_size)
+ return;
+
+ /* clear BIOS DATA AREA */
+ memset((void *)X86_BDA_BASE, 0, X86_BDA_SIZE);
+
+ write16(X86_EBDA_LOWMEM, (low_memory_size >> 10));
+ write16(X86_EBDA_SEGMENT, ebda_segment);
+
+ /* Set up EBDA */
+ memset((void *)(ebda_segment << 4), 0, ebda_size);
+ write16((ebda_segment << 4), (ebda_size >> 10));
+}
+
+void setup_default_ebda(void)
+{
+ setup_ebda(DEFAULT_EBDA_LOWMEM,
+ DEFAULT_EBDA_SEGMENT,
+ DEFAULT_EBDA_SIZE);
+}
diff --git a/src/devices/device.c b/src/devices/device.c
index 0d2bf8f1ae..0e9c39e203 100644
--- a/src/devices/device.c
+++ b/src/devices/device.c
@@ -41,6 +41,9 @@
#include <stdlib.h>
#include <string.h>
#include <smp/spinlock.h>
+#if CONFIG_ARCH_X86
+#include <arch/ebda.h>
+#endif
/** Linked list of ALL devices */
struct device *all_devices = &dev_root;
@@ -1102,6 +1105,11 @@ void dev_initialize(void)
printk(BIOS_INFO, "Initializing devices...\n");
+#if CONFIG_ARCH_X86
+ /* Ensure EBDA is prepared before Option ROMs. */
+ setup_default_ebda();
+#endif
+
/* First call the mainboard init. */
init_dev(&dev_root);
diff --git a/src/devices/oprom/x86.c b/src/devices/oprom/x86.c
index 0c15b1560c..564017d4e4 100644
--- a/src/devices/oprom/x86.c
+++ b/src/devices/oprom/x86.c
@@ -40,19 +40,6 @@ void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx, u32 edx,
u32 esi, u32 edi) __attribute__((regparm(0))) =
(void *)&__realmode_interrupt;
-static void setup_bda(void)
-{
- /* clear BIOS DATA AREA */
- memset((void *)0x400, 0, 0x200);
-
- write16(0x413, FAKE_MEMORY_SIZE / 1024);
- write16(0x40e, INITIAL_EBDA_SEGMENT);
-
- /* Set up EBDA */
- memset((void *)(INITIAL_EBDA_SEGMENT << 4), 0, INITIAL_EBDA_SIZE);
- write16((INITIAL_EBDA_SEGMENT << 4) + 0x0, INITIAL_EBDA_SIZE / 1024);
-}
-
static void setup_rombios(void)
{
const char date[] = "06/11/99";
@@ -272,9 +259,6 @@ void run_bios(struct device *dev, unsigned long addr)
*/
setup_i8259();
- /* Set up BIOS Data Area */
- setup_bda();
-
/* Set up some legacy information in the F segment */
setup_rombios();