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* [MIPS] Handle aliases in vmalloc correctly.Ralf Baechle2008-04-071-2/+16
| | | | | | | flush_cache_vmap / flush_cache_vunmap were calling flush_cache_all which - having been deprecated - turned into a nop ... Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Merge branch 'upstream' of ↵Linus Torvalds2008-04-041-1/+1
|\ | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ralf/upstream-linus * 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/ralf/upstream-linus: [MIPS] Make KGDB compile on UP [MIPS] Pb1200: Fix header breakage
| * [MIPS] Pb1200: Fix header breakageSergei Shtylyov2008-04-041-1/+1
| | | | | | | | | | Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | kvm: provide kvm.h for all architecture: fixes headers_installChristian Borntraeger2008-04-021-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently include/linux/kvm.h is not considered by make headers_install, because Kbuild cannot handle " unifdef-$(CONFIG_FOO) += foo.h. This problem was introduced by commit fb56dbb31c4738a3918db81fd24da732ce3b4ae6 Author: Avi Kivity <avi@qumranet.com> Date: Sun Dec 2 10:50:06 2007 +0200 KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM Currently, make headers_check barfs due to <asm/kvm.h>, which <linux/kvm.h> includes, not existing. Rather than add a zillion <asm/kvm.h>s, export kvm. only if the arch actually supports it. Signed-off-by: Avi Kivity <avi@qumranet.com> which makes this an 2.6.25 regression. One way of solving the issue is to enhance Kbuild, but Avi and David conviced me, that changing headers_install is not the way to go. This patch changes the definition for linux/kvm.h to unifdef-y. If  unifdef-y is used for linux/kvm.h "make headers_check" will fail on all architectures without asm/kvm.h. Therefore, this patch also provides asm/kvm.h on all architectures. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Avi Kivity <avi@qumranet.com> Cc: Sam Ravnborg <sam@ravnborg.org Cc: David Woodhouse <dwmw2@infradead.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [MIPS] Alchemy: work around clock misdetection on early Au1000Sergei Shtylyov2008-04-011-0/+1
|/ | | | | | | | | | | | | | | Work around the CPU clock miscalculation on Au1000DA/HA/HB due the sys_cpupll register being write-only, i.e. actually do what the comment before cal_r4off() function advertised for years but the code failed at. This is achieved by just giving user a chance to define the clock explicitly in the board config. via CONFIG_SOC_AU1000_FREQUENCY option, defaulting to 396 MHz if the option is not given... The patch is based on the AMD's big unpublished patch, the issue seems to be an undocumented errata (or feature :-)... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Clocksource: Only install r4k counter as clocksource if present.Ralf Baechle2008-03-121-2/+3
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Lasat: fix LASAT_CASCADE_IRQYoichi Yuasa2008-03-121-1/+1
| | | | | Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix yosemite build errorRalf Baechle2008-03-122-1/+2
| | | | | | <linux/mm.h> didn't pickup the definition of PKMAP_BASE from fixmap.h, ugh. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix loads of section missmatchesRalf Baechle2008-03-121-1/+1
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] IP27: Tighten up CPU description to fix warnings.Ralf Baechle2008-03-121-0/+4
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Fix plat_ioremap for JMR3927Atsushi Nemoto2008-03-121-1/+1
| | | | | | | TX39XX's "reserved" segment in CKSEG3 area is 0xff000000-0xfffeffff. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Alchemy: compile fixManuel Lauss2008-02-244-0/+4
| | | | | | | | Commit 8b798c4d16b762d15f4055597ff8d87f73b35552 broke alchemy build, fix it. Pointed out by Adrian Bunk. Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* [MIPS] RM: fix EISA=n compilationAdrian Bunk2008-02-191-0/+7
| | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following build error with CONFIG_EISA=n caused by commit 231a35d37293ab88d325a9cb94e5474c156282c0: <-- snip --> ... LD .tmp_vmlinux1 arch/mips/sni/built-in.o: In function `snirm_a20r_setup_devinit': a20r.c:(.init.text+0x42c): undefined reference to `sni_eisa_root_init' a20r.c:(.init.text+0x42c): relocation truncated to fit: R_MIPS_26 against `sni_eisa_root_init' arch/mips/sni/built-in.o: In function `snirm_setup_devinit': rm200.c:(.init.text+0x52c): undefined reference to `sni_eisa_root_init' rm200.c:(.init.text+0x52c): relocation truncated to fit: R_MIPS_26 against `sni_eisa_root_init' make[1]: *** [.tmp_vmlinux1] Error 1 <-- snip --> Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Qemu: finish platform removalAdrian Bunk2008-02-191-30/+0
| | | | | | | Two files were omitted from the recent removal of the qemu platform. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Wire up the timerfd_*() o32 system callsDmitri Vorobiev2008-02-191-6/+15
| | | | | | | | | | | | | | | | | | This patch enables the system calls timerfd_create(), timerfd_settime() and timerfd_gettime() for MIPS architecture. Please see the following Bugzilla entry for more details: http://bugzilla.kernel.org/show_bug.cgi?id=10038 This was tested using a Malta 4Kc board in both little-endian and big-endian modes. The unit test program is available from the URL above. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> [Ralf: Added N64, N32 and O32 bits on 64-bit kernels.] Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] IP27: Add missing ~ in DMA code.Ralf Baechle2008-02-191-1/+1
| | | | | | | Harmless since this function is not being called on I/O coherent systems such as IP27. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* CONFIG_HIGHPTE vs. sub-page page tables.Martin Schwidefsky2008-02-082-5/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* asm-*/posix_types.h: scrub __GLIBC__Mike Frysinger2008-02-081-2/+2
| | | | | | | | | | | | | | Some arches (like alpha and ia64) already have a clean posix_types.h header. This brings all the others in line by removing all references to __GLIBC__ (and some undocumented __USE_ALL). Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* aout: move STACK_TOP[_MAX] to asm/processor.hDavid Howells2008-02-082-13/+7
| | | | | | | | | | Move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're required whether or not A.OUT format is available. Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add cmpxchg64 and cmpxchg64_local to mipsMathieu Desnoyers2008-02-071-0/+17
| | | | | | | | | | Make sure that at least cmpxchg64_local is available on all architectures to use for unsigned long long values. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Sanitize the type of struct user.u_ar0H. Peter Anvin2008-02-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct user.u_ar0 is defined to contain a pointer offset on all architectures in which it is defined (all architectures which define an a.out format except SPARC.) However, it has a pointer type in the headers, which is pointless -- <asm/user.h> is not exported to userspace, and it just makes the code messy. Redefine the field as "unsigned long" (which is the same size as a pointer on all Linux architectures) and change the setting code to user offsetof() instead of hand-coded arithmetic. Cc: Linux Arch Mailing List <linux-arch@vger.kernel.org> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Håvard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Cleanup asm/{elf,page,user}.h: #ifdef __KERNEL__ is no longer neededKirill A. Shutemov2008-02-073-13/+0
| | | | | | | | | | | | | asm/elf.h, asm/page.h and asm/user.h don't export to userspace now, so we can drop #ifdef __KERNEL__ for them. [k.shutemov@gmail.com: remove #ifdef __KERNEL_] Signed-off-by: Kirill A. Shutemov <k.shutemov@gmail.com> Reviewed-by: David Woodhouse <dwmw2@infradead.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Kirill A. Shutemov <k.shutemov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* add mm argument to pte/pmd/pud/pgd_freeBenjamin Herrenschmidt2008-02-051-6/+6
| | | | | | | | | | | | | | | | | | (with Martin Schwidefsky <schwidefsky@de.ibm.com>) The pgd/pud/pmd/pte page table allocation functions get a mm_struct pointer as first argument. The free functions do not get the mm_struct argument. This is 1) asymmetrical and 2) to do mm related page table allocations the mm argument is needed on the free function as well. [kamalesh@linux.vnet.ibm.com: i386 fix] [akpm@linux-foundation.org: coding-syle fixes] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* maps4: rework TASK_SIZE macrosDave Hansen2008-02-051-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following replaces the earlier patches sent. It should address David Rientjes's comments, and has been compile tested on all the architectures that it touches, save for parisc. For the /proc/<pid>/pagemap code[1], we need to able to query how much virtual address space a particular task has. The trick is that we do it through /proc and can't use TASK_SIZE since it references "current" on some arches. The process opening the /proc file might be a 32-bit process opening a 64-bit process's pagemap file. x86_64 already has a TASK_SIZE_OF() macro: #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64) I'd like to have that for other architectures. So, add it for all the architectures that actually use "current" in their TASK_SIZE. For the others, just add a quick #define in sched.h to use plain old TASK_SIZE. 1. http://www.linuxworld.com/news/2007/042407-kernel.html - MIPS portion from Ralf Baechle <ralf@linux-mips.org> [akpm@linux-foundation.org: fix mips build] Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Matt Mackall <mpm@selenic.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* include/asm-mips/: Spelling fixesJoe Perches2008-02-034-4/+4
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* asm-*/compat.h: fix typo in commentMarcin Ślusarz2008-02-031-1/+1
| | | | | Signed-off-by: Marcin Ślusarz <marcin.slusarz@gmail.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* au1xxx-ide: use hwif->devBartlomiej Zolnierkiewicz2008-02-011-1/+0
| | | | | | | | | | | * Setup hwif->dev in au_ide_probe(). * Use hwif->dev instead of ahwif->dev in auide_build_sglist(), auide_build_dmatable(), auide_dma_end() and auide_ddma_init(). * Remove no longer needed 'dev' field from _auide_hwif type. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* [NET]: Introducing socket mark socket option.Laszlo Attila Toth2008-01-311-0/+2
| | | | | | | | | | | | A userspace program may wish to set the mark for each packets its send without using the netfilter MARK target. Changing the mark can be used for mark based routing without netfilter or for packet filtering. It requires CAP_NET_ADMIN capability. Signed-off-by: Laszlo Attila Toth <panther@balabit.hu> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [MIPS] Malta, Atlas: move an extern function declaration to the header fileDmitri Vorobiev2008-01-291-0/+4
| | | | | | | | | | This was compile-tested using default configs for the boards affected by this change. This patch does not introduce any functional changes. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Malta, Atlas, Sead: remove an extern from .c filesDmitri Vorobiev2008-01-291-0/+2
| | | | | | | | | | | | | | | | | This patch moves the "extern" declaration for the function mips_reboot_setup() from the board setup .c files to the header file include/asm-mips/mips-boards/generic.h. This fixes a warning produced by the checkpatch.pl script. No functional changes introduced. This was compile-tested by building the kernel for all three boards affected by this change. All builds finished successfully. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Qemu: Remove platform.Ralf Baechle2008-01-292-57/+0
| | | | | | | | | | The Qemu platform was originally implemented to have an easily supportable platform until Qemu reaches a state where it emulates a real world system. Since the latest release Qemu is capable of emulating the MIPSsim and Malta platforms, so this goal has been reached. The Qemu plaform is also rather underfeatured so less useful than a Malta emulation. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Delete CONFIG_MSP_FPGARalf Baechle2008-01-291-4/+0
| | | | | | Originally noticed by Jiri Olsa <olsajiri@gmail.com>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] remove unneeded button check for resetYoichi Yuasa2008-01-291-14/+1
| | | | | | | | Removed unneeded button check for reset. Because, the Cobalt has power switch. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] time: remove unused mips_timer_state()Yoichi Yuasa2008-01-291-8/+1
| | | | | Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] fixmap: delete unused __set_fixmap, set_fixmap and set_fixmap_nocacheRalf Baechle2008-01-291-10/+0
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] RM: Collected changesThomas Bogendoerfer2008-01-293-68/+94
| | | | | | | | | | | | | | | | - EISA support for non PCI RMs (RM200 and RM400-xxx). The major part is the splitting of the EISA and onboard ISA of the RM200, which makes the EISA bus on the RM200 look like on other RMs. - 64bit kernel support - system type detection is now common for big and little endian - moved sniprom code to arch/mips/fw - added call_o32 function to arch/mips/fw/lib, which uses a private stack for calling prom functions - fix problem with ISA interrupts, which makes using PIT clockevent possible Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Alchemy: Au1210/Au1250 CPU supportManuel Lauss2008-01-291-2/+2
| | | | | | | | | | This patch adds IDs for new Au1200 variants: Au1210 and Au1250. They are essentially identical to the Au1200 except for the Au1210 which has a different SoC-ID in the PRId register [bits 31:24]. The Au1250 is a "Au1200 V0.2". Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] IP28 supportThomas Bogendoerfer2008-01-295-4/+104
| | | | | | | | Add support for SGI IP28 machines (Indigo 2 with R10k CPUs) This work is mainly based on Peter Fuersts work. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Remove CONFIG_SIBYTE_PT{1120,1125,SWARM}Ralf Baechle2008-01-292-22/+2
| | | | | | | | According to Broadcom the PT systems are production test systems which never reached customers so no need to keep the fragmentary support we currently have. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] IP28: added cache barrier to assembly routinesThomas Bogendoerfer2008-01-291-0/+8
| | | | | | | | | | | IP28 needs special treatment to avoid speculative accesses. gcc takes care for .c code, but for assembly code we need to do it manually. This is taken from Peter Fuersts IP28 patches. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] TXx9 watchdog support for rbhma3100,rbhma4200,rbhma4500Atsushi Nemoto2008-01-291-0/+1
| | | | | | | | This patch adds support for txx9wdt driver to rbhma3100, rbhma4200 and rbhma4500 platform. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] IP22/IP28: fix extracting board/chip revThomas Bogendoerfer2008-01-291-2/+2
| | | | | | | Taken from Peter Fuersts IP28 patches Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Use real cache invalidateThomas Bogendoerfer2008-01-291-0/+7
| | | | | | | | | R10k non coherent machines need a real dma cache invalidate to get rid of speculative stores in cache. For other machines this promises a slight speedup. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] SMP: Call platform methods via ops structure.Ralf Baechle2008-01-293-58/+61
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] MT: Scheduler support for SMTRalf Baechle2008-01-293-1/+23
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] Put cast inside macro instead of all the callersAndrew Sharp2008-01-291-1/+1
| | | | | | | | | | Since all the callers of the PHYS_TO_XKPHYS macro call with a constant, put the cast to LL inside the macro where it really should be rather than in all the callers. This makes macros like PHYS_TO_XKSEG_UNCACHED work without gcc whining. Signed-off-by: Andrew Sharp <andy.sharp@onstor.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] remove unused mips_machtypeYoichi Yuasa2008-01-291-104/+0
| | | | | | | Removed unused mips_machtype. These are only set but not used. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] CFE: Make code remotely resemble Linux code.Christoph Hellwig2008-01-292-87/+19
| | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] R4000/R4400 daddiu erratum workaroundMaciej W. Rozycki2008-01-293-4/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This complements the generic R4000/R4400 errata workaround code and adds bits for the daddiu problem. In most places it just modifies handwritten assembly code so that the assembler is allowed to use a temporary register as daddiu may now be treated as a macro that expands to a sequence of li and daddu. It is the AT register or, where AT is unavailable or used explicitly for another purpose, an explicitly-named register is selected, using the .set at=<reg> feature added recently to gas. This feature is only used if CONFIG_CPU_DADDI_WORKAROUNDS has been set, so if the workaround remains disabled, the required version of binutils stays unchanged. Similarly, daddiu instructions put in branch delay slots in noreorder fragments are now taken out of them and the assembler is allowed to reorder them itself as possible (which it does making the whole idea of scheduling them into delay slots manually questionable). Also in the very few places where such a simple conversion was not possible, a handcoded longer sequence is implemented. Other than that there are changes to code responsible for building the TLB fault and page clear/copy handlers to avoid daddiu as appropriate. These are only effective if the erratum is verified to be present at the run time. Finally there is a trivial update to __delay(), because it uses daddiu in a branch delay slot. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* [MIPS] R4000/R4400 errata workaroundsMaciej W. Rozycki2008-01-293-2/+97
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the gereric part of R4000/R4400 errata workarounds. They include compiler and assembler support as well as some source code modifications to address the problems with some combinations of multiply/divide+shift instructions as well as the daddi and daddiu instructions. Changes included are as follows: 1. New Kconfig options to select workarounds by platforms as necessary. 2. Arch top-level Makefile to pass necessary options to the compiler; also incompatible configurations are detected (-mno-sym32 unsupported as horribly intrusive for little gain). 3. Bug detection updated and shuffled -- the multiply/divide+shift problem is lethal enough that if not worked around it makes the kernel crash in time_init() because of a division by zero; the daddiu erratum might also trigger early potentially, though I have not observed it. On the other hand the daddi detection code requires the exception subsystem to have been initialised (and is there mainly for information). 4. r4k_daddiu_bug() added so that the existence of the erratum can be queried by code at the run time as necessary; useful for generated code like TLB fault and copy/clear page handlers. 5. __udelay() updated as it uses multiplication in inline assembly. Note that -mdaddi requires modified toolchain (which has been maintained by myself and available from my site for ~4years now -- versions covered are GCC 2.95.4 - 4.1.2 and binutils from 2.13 onwards). The -mfix-r4000 and -mfix-r4400 have been standard for a while though. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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