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path: root/arch/m68k/kernel/head.S
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2014-07-10m68k: Fix boot regression on machines with RAM at non-zeroGeert Uytterhoeven
My enhancement to store the initial mapping size for later reuse in commit 486df8bc4627bdfc032d11bedcd056cc5343ee62 ("m68k: Increase initial mapping to 8 or 16 MiB if possible") broke booting on machines where RAM doesn't start at address zero. Use pc-relative addressing to fix this. Reported-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Andreas Schwab <schwab@linux-m68k.org>
2014-05-28m68k: Increase initial mapping to 8 or 16 MiB if possibleAndreas Schwab
If the size of the first memory chunk is at least 8 or 16 MiB increase the initial mapping to 8 resp. 16 MiB instead of 4 MiB. This makes it possible to 1. Map more memory in the first node without running out of space for the page tables, 2. Boot kernels that don't fit in 4 MiB (e.g. multi_defconfig). Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> - Add support for 8 MiB, - Store initial mapping size in head.S for later reuse, - Add comment about large kernels. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-05-28m68k/atari: fix SCC initialization for debug consoleFinn Thain
Fix SCC initialization for Atari as was previously fixed for Mac. It's probably not practical to share more code but some attempt is made to align the Mac and Atari variants. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-05-28m68k/mvme16x: Adopt common boot consoleFinn Thain
In a multi-platform kernel binary we only need one early console instance. The difficulty here is that the common early console is started by early_param(), whereas the MVME16x instance is started later by config_mvme16x(). That means some interrupt setup must be done earlier. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stephen N Chivers <schivers@csc.com.au> [Geert] Tag debug_cons_write() with __ref to kill section mismatch warning Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-05-28m68k: Multi-platform EARLY_PRINTKFinn Thain
Make the boot console available to more m68k platforms by leveraging the head.S debug console. The boot console is enabled by the "earlyprintk" command line argument which is how most other architectures do this. This is a change of behaviour for the Mac but does not negatively impact the common use-case which is not debugging. This is also a change of behaviour for other platforms because it means the serial port stays quiet when CONFIG_EARLY_PRINTK is not enabled. This is also an improvement for the common use-case. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stephen N Chivers <schivers@csc.com.au> [Geert: CONSOLE_DEBUG should depend on CONFIG_FONT_SUPPORT] Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-05-26m68k: Toward platform agnostic framebuffer debug loggingFinn Thain
Code subject to #ifdef CONSOLE is made more generic, as was apparently intended by the original author. Remove console_put_stats() routine. If it should be somehow useful, it should also be useful on platforms without framebuffer debug logging. The present implementation is only built #if defined CONFIG_MAC && defined CONSOLE even though puts() works everywhere. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stephen N Chivers <schivers@csc.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-03-10m68k: head.S - Remove bogus L prefix in commentGeert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-03-10m68k: Remove dead codeFinn Thain
Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-03-10m68k: Remove CONSOLE_PENGUIN macro, adopt CONFIG_LOGOFinn Thain
Allow CONFIG_LOGO to enable/disable the head.S penguin logo as well as the framebuffer console logo. This should save a few bytes. It also gets rid of the obscure CONSOLE_PENGUIN macro. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-01-19m68k/mac: Make SCC reset work more reliablyFinn Thain
For SCC initialization we cannot assume that the control register is in the correct state to accept a register pointer. So first read from the control register in order to "sync" up. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-11-26m68k/UAPI: Disintegrate arch/m68k/include/asm/bootinfo.hGeert Uytterhoeven
Export the bootinfo definitions that are used by bootstrap loaders, and split them up in generic and platform-specific parts. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-11-26m68k/mac: Move struct mac_booter_data to <asm/macintosh.h>Geert Uytterhoeven
struct mac_booter_data is no longer part of the bootinfo API, hence move it from <asm/bootinfo.h> to <asm/macintosh.h>, dropping all unused fields in the process. Also remove the no longer used mac_booter_data pointer from head.S. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-11-26m68k: head.S - Correct date and spellingGeert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-11-26m68k: The bootinfo is located right after the kernelGeert Uytterhoeven
Since the introduction of init sections (which are located after BSS), the bootinfo is no longer located right after the BSS, but after all kernel sections. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2013-05-31m68k/mac: Fix unexpected interrupt with CONFIG_EARLY_PRINTKFinn Thain
The present code does not wait for the SCC to finish resetting itself before trying to initialise the device. The result is that the SCC interrupt sources become enabled (if they weren't already). This leads to an early boot crash (unexpected interrupt) given CONFIG_EARLY_PRINTK. Fix this by adding a delay. A successful reset disables the interrupt sources. Also, after the reset for channel A setup, the SCC then gets a second reset for channel B setup which leaves channel A uninitialised again. Fix this by performing the reset only once. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Cc: stable@vger.kernel.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-12-10m68k/mac: early consoleFinn Thain
Revive the old mac_serial_print() routine as mac_early_print(). mac_serial_print() did not function because it did not use the right offsets for its stack arguments. Fix this and make compilation conditional on CONFIG_EARLY_PRINTK instead of the obscure MAC_SERIAL_DEBUG macro. Give mac_early_print() a new string length parameter to fit the early console API. Send output to the framebuffer as well as serial ports. Change the line rate to 38400 baud to match the default for the real (pmac_zilog) serial console. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2009-12-12kbuild: move autoconf.h to include/generatedSam Ravnborg
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-04-26m68k: convert to use __HEAD and HEAD_TEXT macros.Tim Abbott
This has the consequence of changing the section name use for head code from ".text.head" to ".head.text". Since this commit changes all users in the architecture, this change should be harmless. Signed-off-by: Tim Abbott <tabbott@mit.edu> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-18m68k: Correct jump if not running on HP300Geert Uytterhoeven
When running a HP300-enabled kernel on non-HP300 hardware, a test in the early startup code jumps to the wrong label, causing a double bus fault. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-20m68k: use .text.headAl Viro
i.e. tell modpost that entry point code (that has to be outside of .init.text for external reasons) is OK to refer to .init.* Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-04m68k: reformat various m68k filesRoman Zippel
Reformat various m68k files, so they actually look like Linux sources. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-01-12[PATCH] m68k: console code in head.S needs framebuffer support built inAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-09kbuild: m68k,parisc,ppc,ppc64,s390,xtensa use generic asm-offsets.h supportSam Ravnborg
Delete obsoleted parts form arch makefiles and rename to asm-offsets.h Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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