u-boot/board/eNET/config.mk
Graeme Russ 077e1958ca x86: Add RAM bootstrap functionality
Add a parameter to the 32-bit entry to indicate if entry is from Real
Mode or not. If entry is from Real Mode, execute the destructive 'sizer'
routine to determine memory size as we are booting cold and running in
Flash. If not entering from Real Mode, we are executing a U-Boot image
from RAM and therefore the memory size is already known (and running
'sizer' will destroy the running image)

There are now two 32-bit entry points. The first is the 'in RAM' entry
point which exists at the start of the U-Boot binary image. As such,
you can load u-boot.bin in RAM and jump directly to the load address
without needing to calculate any offsets. The second entry point is
used by the real-to-protected mode switch

This patch also changes TEXT_BASE to 0x6000000 (in RAM). You can load
the resulting image at 0x6000000 and simple go 0x6000000 from the u-boot
prompt

Hopefully a later patch will completely elliminate any dependency on
TEXT_BASE like a relocatable linux kernel (perfect world)

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
2010-05-06 00:15:31 +02:00

28 lines
1.1 KiB
Makefile

#
# (C) Copyright 2002
# Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
#
# See file CREDITS for list of people who contributed to this
# project.
#
# 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., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
TEXT_BASE = 0x06000000
CFLAGS_common/dlmalloc.o += -Wa,--no-warn -fno-strict-aliasing
PLATFORM_RELFLAGS += -fvisibility=hidden
PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
PLATFORM_LDFLAGS += -pic --emit-relocs -Bsymbolic -Bsymbolic-functions