summaryrefslogtreecommitdiff
path: root/cpu/mips/start.S
Commit message (Collapse)AuthorAgeLines
* [MIPS] Cleanup CP0 Status initializationShinya Kuribayashi2008-03-25-9/+25
| | | | | | | | Add setup_c0_status from Linux. For the moment we disable interrupts, set CU0, mark the kernel mode, and clear ERL and EXL. This is good enough for reset-time configuration and will work well across most processors. Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
* [MIPS] Initialize CP0 Cause before setting up CP0 Status registerShinya Kuribayashi2008-03-25-3/+3
| | | | | | | Without this change, we'll be suffering from deffered WATCH exception once Status.EXL is cleared. Make sure Cause.WP is cleared. Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
* [MIPS] INCA-IP: Move watchdog init code from start.S to lowlevel_init()Shinya Kuribayashi2008-03-25-8/+0
| | | | | | Move things to appropriate place. Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
* [MIPS] Request for the 'mips_cache_lock()' removalShinya Kuribayashi2008-03-25-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The initial intension of having mips_cache_lock() was to use the cache as memory for temporary stack use so that a C environment can be set up as early as possible. But now mips_cache_lock() follow lowlevel_init(). We've already have the real memory initilaized at this point, therefore we could/should use it. No reason to lock at all. Other problems: Cache locking is not consistent across MIPS implementaions. Some imple- mentations don't support locking at all. The style of locking varies - some support per line locking, others per way, etc. Some parts use bits in status registers instead of cache ops. Current mips_cache_lock() is not necessarily general-purpose. And this is worthy of special mention; once U-Boot/MIPS locks the lines, they are never get unlocked, so the code relies on whatever gets loaded after U-Boot to re-initialize the cache and clear the locks. We're sup- posed to have CFG_INIT_RAM_LOCK and unlock_ram_in_cache() implemented, but leave the situation as it is for a long time. For these reasons, I proposed the removal of mips_cache_lock() from the global start-up code. This patch adds CFG_INIT_RAM_LOCK_MIPS to make existing users aware that *things have changed*. If he wants the same behavior as before, he needs to have CFG_INIT_RAM_LOCK_MIPS in his config file. If we don't have any regression report through several releases, then we'll remove codes entirely. Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp> Acked-by: Andrew Dyer <amdyer@gmail.com>
* [MIPS] Remove useless instructions for initializing $gp.Shinya Kuribayashi2007-11-17-3/+1
| | | | Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
* [MIPS] MIPS 4K core: Coding style cleanupsShinya Kuribayashi2007-11-17-27/+23
| | | | | | No logical changes. Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
* [MIPS] Fix $gp usageShinya Kuribayashi2007-10-21-6/+13
| | | | | | | | | | | | | | | | | | | | Now we load $gp with _GLOBAL_OFFSET_TABLE_, but this is incorrect use. As a general principle, we should use _gp for $gp. Thanks to linker script's help we fortunately have _gp which equals to _GLOBAL_OFFSET_TABLE_. But once _gp gets out of alignment, we will not be able to access to GOT entires, global variables and procedure entry points. The right thing to do is to use _gp. This patch also introduce a new symbol `.gpword _GLOBAL_OFFSET_TABLE_' which holds the offset from _gp. When updating GOT entries, we use this offset and _gp to calculate the final _GLOBAL_OFFSET_TABLE_. This patch is originally submitted by Vlad Lungu <vlad@comsys.ro>, then I made some change to leave over num_got_entries. Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com> Cc: Vlad Lungu <vlad@comsys.ro>
* Fix U-Boot compilation for MIPS boards using ELDK 4.0Wolfgang Denk2005-12-01-13/+18
|
* Prepare for SoC rework of ARM code:wdenk2005-04-02-1/+1
| | | | | - rename CONFIG_BOOTBINFUNC into CONFIG_INIT_CRITICAL - rename memsetup into lowlevel_init (function name and source files)
* * Patch by liang a lei, 9 Jan 2004:wdenk2004-02-07-0/+4
| | | | | | | | | | | Fix Intel 28F128J3 ID in include/flash.h * Patch by Masami Komiya, 09 Jan 2004: add support for TB0229 board (NEC VR4131 MIPS processor) * Patch by Leon Kukovec, 12 Dec 2003: changed extern __inline__ into static __inline__ in include/linux/byteorder/swab.h
* * Implement new mechanism to export U-Boot's functions to standalonewdenk2003-07-24-5/+5
| | | | | | | | applications: instead of using (PPC-specific) system calls we now use a jump table; please see doc/README.standalone for details * Patch by Dave Westwood, 24 Jul 2003: added support for Unity OS (a proprietary OS)
* * Code cleanup:wdenk2003-06-27-10/+8
| | | | | | | | | - remove trailing white space, trailing empty lines, C++ comments, etc. - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c) * Patches by Kenneth Johansson, 25 Jun 2003: - major rework of command structure (work done mostly by Michal Cendrowski and Joakim Kristiansen)
* * Get (mostly) rid of CFG_MONITOR_LEN definition; compute real lengthwdenk2003-05-30-1/+2
| | | | | | | | instead CFG_MONITOR_LEN is now only used to determine _at_compile_ _time_ (!) if the environment is embedded within the U-Boot image, or in a separate flash sector. * Cleanup CFG_DER #defines in config files (wd maintained only)
* * Patch by Arun Dharankar, 4 Apr 2003:wdenk2003-04-05-3/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add IDMA example code (tested on 8260 only) * Add support for Purple Board (MIPS64 5Kc) * Add support for MIPS64 5Kc CPUs * Fix missing setting of "loadaddr" and "bootfile" on ARM and MIPS * Patch by Denis Peter, 04 Apr 2003: - update MIP405-4 board * Patches by Denis Peter, 03 April 2003: - fix PCI IRQs on MPL boards - fix two more un-relocated pointer problems * Fix behaviour of "run" command: - print error message iv variable does not exist - terminate processing of arguments in case of error * Patches by Peter Figuli, 10 Mar 2003 - Add support for BTUART on PXA platform - Add support for WEP EP250 (PXA) board * Fix flash problems on INCA-IP; add tool to allow bruning images to flash using a BDI2000 * Implement fix for I2C Edge Conditions problem for all boards that use the bit-banging driver (common/soft_i2c.c) * Add patches by Robert Schwebel, 31 Mar 2003: - csb226 board: bring in sync with innokom/memsetup.S - csb226 board: fix MDREFR handling - misc doc fixes / extensions - innokom board: cleanup, MDREFR fix in memsetup.S, config update - add BOOT_PROGRESS to armlinux.c
* * Add support for MIPS32 4Kc CPUswdenk2003-03-27-0/+350
* Add support for INCA-IP Board
generated by cgit v1.1 at 2024-11-15 13:48:24 +0000