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2007-05-09[POWERPC] Change rheap functions to use ulongs instead of pointersTimur Tabi1-50/+67
The rheap allocation functions return a pointer, but the actual value is based on how the heap was initialized, and so it can be anything, e.g. an offset into a buffer. A ulong is a better representation of the value returned by the allocation functions. This patch changes all of the relevant rheap functions to use a unsigned long integers instead of a pointer. In case of an error, the value returned is a negative error code that has been cast to an unsigned long. The caller can use the IS_ERR_VALUE() macro to check for this. All code which calls the rheap functions is updated accordingly. Macros IS_MURAM_ERR() and IS_DPERR(), have been deleted in favor of IS_ERR_VALUE(). Also added error checking to rh_attach_region(). Signed-off-by: Timur Tabi <[email protected]> Signed-off-by: Kumar Gala <[email protected]>
2007-05-08[POWERPC] Remove use of 4level-fixup.h for ppc32David Gibson1-1/+3
For 32-bit systems, powerpc still relies on the 4level-fixup.h hack, to pretend that the generic pagetable handling stuff is 3-levels rather than 4. This patch removes this, instead using the newer pgtable-nopmd.h to handle the elision of both the pud and pmd pagetable levels (ppc32 pagetables are actually 2 levels). This removes a little extraneous code, and makes it more easily compared to the 64-bit pagetable code. Signed-off-by: David Gibson <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2007-04-30Merge branch 'linux-2.6' into for-2.6.22Paul Mackerras2-28/+2
2007-04-26[STRING]: Move strcasecmp/strncasecmp to lib/string.cDavid S. Miller2-28/+2
We have several platforms using local copies of identical code. Signed-off-by: David S. Miller <[email protected]>
2007-04-24[POWERPC] Emulate more instructions in softwareAnanth N Mavinakayanahalli1-1/+44
Emulate a few more instructions in software - especially useful during singlestepping (xmon/kprobes). Instructions emulated with this patch are mfcr/mtcr rX, mfxer/mtxer rX, mflr/mtlr rX, mfctr/mtctr rX and mr rA,rB. Signed-off-by: Ananth N Mavinakayanahalli <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2007-04-13[POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=yOlof Johansson3-9/+9
mtocrf is a faster single-field mtcrf (move to condition register fields) instruction available in POWER4 and later processors. It can make quite a difference in performance on some implementations, so use it for CONFIG_POWER4_ONLY builds. Signed-off-by: Olof Johansson <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2007-03-09[POWERPC] Make ppc64_defconfig without CONFIG_PPC_PSERIES buildStephen Rothwell1-0/+4
Signed-off-by: Stephen Rothwell <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2007-02-08[POWERPC] Use ARRAY_SIZE macro when appropriateAhmed S. Darwish1-1/+2
Use ARRAY_SIZE macro already defined in linux/kernel.h Signed-off-by: Ahmed S. Darwish <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2007-02-06[POWERPC] Added kprobes support to ppc32Kumar Gala1-1/+1
Added kprobes to ppc32 platforms that have use single_step_exception. This excludes 4xx and anything Book-E since their debug mechanisms for single stepping are completely different. Signed-off-by: Kumar Gala <[email protected]>
2007-02-07[POWERPC] Fix array indexing error in rheap grow()Timur Tabi1-1/+2
The grow() function in the rheap library allocates a larger array of blocks, copies the contents of the old blocks array to the newly allocated array and fixes the list_head pointers after the copy. At the end, the new blocks must be enqueued to the empty_list of the rh_info_t structure. This patch fixes a bug where the code was indexing past the end of the array when enqueueing blocks. The UCC ethernet driver, which uses the rheap allocator, experiences kernel panics because of this bug. Signed-off-by: Ionut Nicu <[email protected]> Signed-off-by: Timur Tabi <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2007-02-07[POWERPC] 8xx: generic 8xx code arch/powerpc portVitaly Bordug2-0/+420
Including support for non-coherent cache, some mm-related things + relevant field in Kconfig and Makefiles. Also included rheap.o compilation if 8xx is defined. Non-coherent mapping were refined and renamed according to Cristoph Hellwig. Orphaned functions were cleaned up. [Also removed arch/ppc/kernel/dma-mapping.c, because otherwise compiling with ARCH=ppc for a non DMA-cache-coherent platform ends up with two copies of __dma_alloc_coherent etc. -- paulus.] Signed-off-by: Vitaly Bordug <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2006-11-01[POWERPC] Disallow kprobes on emulate_step and branch_takenGui,Jian1-2/+3
On powerpc, probing on emulate_step function will crash 2.6.18.1 when it is triggered. When kprobe is triggered, emulate_step() is on its kernel path and will cause recursive kprobe fault. And branch_taken() is called in emulate_step(). This disallows kprobes on both of them. Signed-off-by: Paul Mackerras <[email protected]>
2006-10-02[POWERPC] Fix rheap alignment problemLi Yang2-4/+21
Honor alignment parameter in the rheap allocator. This is needed by qe_lib. Remove compile warning. Signed-off-by: Pantelis Antoniou <[email protected]> Signed-off-by: Li Yang <[email protected]> Acked-by: Kumar Galak <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2006-09-28Merge branch 'upstream' of ↵Paul Mackerras1-0/+5
git://git.kernel.org/pub/scm/linux/kernel/git/vitb/linux-2.6-PQ
2006-09-21POWERPC: Move generic cpm2 stuff to powerpcVitaly Bordug1-0/+5
This moves the cpm2 common code and PIC stuff to the powerpc. Most of the files were just copied from ppc/, with minor tuning to make it compile, and, subsequently, work. Signed-off-by: Vitaly Bordug <[email protected]>
2006-09-20[POWERPC] make spinlocks work in a combined kernelStephen Rothwell1-14/+13
If we build a pSeries/iSeries combined kernel, we will need this. Signed-off-by: Stephen Rothwell <[email protected]>
2006-08-31Merge branch 'merge'Paul Mackerras1-4/+7
2006-08-31[POWERPC] Fix return value from memcpyPaul Mackerras1-4/+7
As pointed out by Herbert Xu <[email protected]>, our memcpy implementation didn't return the destination pointer as its return value, and there is code in the kernel that expects that. This fixes it. Signed-off-by: Paul Mackerras <[email protected]>
2006-07-13[POWERPC] iseries: Move e2a()/strne2a() into their only callerMichael Ellerman2-117/+0
The ASCII -> EBCDIC functions, e2a() and strne2a() are now only used in dt.c, so move them in there. Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: Stephen Rothwell <[email protected]>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel4-4/+0
Signed-off-by: Jörn Engel <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2006-06-15[POWERPC] Optimise some TOC usageAnton Blanchard1-0/+4
Micro-optimisation - add no-minimal-toc to some more arch/powerpc Makefiles. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2006-05-24[PATCH] remove powerpc bitops in favor of existing generic bitopsJon Mason2-151/+0
There already exists a big endian safe bitops implementation in lib/find_next_bit.c. The code in it is 90%+ common with the powerpc specific version, so the powerpc version is redundant. This patch makes the necessary changes to use the generic bitops in powerpc, and removes the powerpc specific version. Signed-off-by: Jon Mason <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2006-03-27[PATCH] powerpc: fix various sparse warningsStephen Rothwell1-1/+1
Signed-off-by: Stephen Rothwell <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2006-03-25powerpc: fix strncasecmp prototypeLinus Torvalds1-1/+3
It takes a size_t, not an int, as its third argument. Signed-off-by: Linus Torvalds <[email protected]>
2006-03-22[PATCH] powerpc: Add strne2a() to convert a string from EBCDIC to ASCIIMichael Ellerman1-0/+10
Add strne2a() which converts a string from EBCDIC to ASCII. Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2006-02-10[PATCH] powerpc: trivial: modify comments to refer to new location of filesJon Mason5-11/+1
This patch removes all self references and fixes references to files in the now defunct arch/ppc64 tree. I think this accomplises everything wanted, though there might be a few references I missed. Signed-off-by: Jon Mason <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2006-01-13[PATCH] powerpc: Remove lppaca structure from the PACADavid Gibson1-6/+2
At present the lppaca - the structure shared with the iSeries hypervisor and phyp - is contained within the PACA, our own low-level per-cpu structure. This doesn't have to be so, the patch below removes it, making a separate array of lppaca structures. This saves approximately 500*NR_CPUS bytes of image size and kernel memory, because we don't need aligning gap between the Linux and hypervisor portions of every PACA. On the other hand it means an extra level of dereference in many accesses to the lppaca. The patch also gets rid of several places where we assign the paca address to a local variable for no particular reason. Signed-off-by: David Gibson <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2005-11-10powerpc: Fix find_next_bit on 32-bitPaul Mackerras1-1/+1
We had a "64" that didn't get changed to BITS_PER_LONG, resulting in find_next_bit not working correctly. Signed-off-by: Paul Mackerras <[email protected]>
2005-11-07Merge ../linux-2.6Paul Mackerras2-3/+3
2005-11-07powerpc: Various UP build fixesPaul Mackerras1-0/+1
Mostly this involves adding #include <asm/smp.h>, since that defines things like boot_cpuid[_phys] and [gs]et_hard_smp_processor_id, which are SMP-related but still needed on UP. This incorporates fixes posted by Olof Johansson and Heikki Lindholm. Signed-off-by: Paul Mackerras <[email protected]>
2005-11-06[PATCH] ppc64: support 64k pagesBenjamin Herrenschmidt2-3/+3
Adds a new CONFIG_PPC_64K_PAGES which, when enabled, changes the kernel base page size to 64K. The resulting kernel still boots on any hardware. On current machines with 4K pages support only, the kernel will maintain 16 "subpages" for each 64K page transparently. Note that while real 64K capable HW has been tested, the current patch will not enable it yet as such hardware is not released yet, and I'm still verifying with the firmware architects the proper to get the information from the newer hypervisors. Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2005-11-02Merge iSeries include file moveStephen Rothwell1-1/+1
2005-11-01[PATCH] powerpc: Merge bitops.hDavid Gibson2-4/+155
Here's a revised version. This re-introduces the set_bits() function from ppc64, which I removed because I thought it was unused (it exists on no other arch). In fact it is used in the powermac interrupt code (but not on pSeries). - We use LARXL/STCXL macros to generate the right (32 or 64 bit) instructions, similar to LDL/STL from ppc_asm.h, used in fpu.S - ppc32 previously used a full "sync" barrier at the end of test_and_*_bit(), whereas ppc64 used an "isync". The merged version uses "isync", since I believe that's sufficient. - The ppc64 versions of then minix_*() bitmap functions have changed semantics. Previously on ppc64, these functions were big-endian (that is bit 0 was the LSB in the first 64-bit, big-endian word). On ppc32 (and x86, for that matter, they were little-endian. As far as I can tell, the big-endian usage was simply wrong - I guess no-one ever tried to use minixfs on ppc64. - On ppc32 find_next_bit() and find_next_zero_bit() are no longer inline (they were already out-of-line on ppc64). - For ppc64, sched_find_first_bit() has moved from mmu_context.h to the merged bitops. What it was doing in mmu_context.h in the first place, I have no idea. - The fls() function is now implemented using the cntlzw instruction on ppc64, instead of generic_fls(), as it already was on ppc32. - For ARCH=ppc, this patch requires adding arch/powerpc/lib to the arch/ppc/Makefile. This in turn requires some changes to arch/powerpc/lib/Makefile which didn't correctly handle ARCH=ppc. Built and running on G5. Signed-off-by: David Gibson <[email protected]> Signed-off-by: Paul Mackerras <[email protected]>
2005-11-01merge filename and modify references to iseries/hv_call.hKelly Daly1-1/+1
Signed-off-by: Kelly Daly <[email protected]>
2005-11-01powerpc: fix __strnlen_user in merge treeStephen Rothwell1-1/+1
Change USER/KERNEL_DS so that the merged version of __strnlen_user can be used which allows us to complete the removal of arch/ppc64/lib/. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-31powerpc: apply recent changes to merged codePaul Mackerras1-0/+1
Signed-off-by: Paul Mackerras <[email protected]>
2005-10-28powerpc: Merge xmonPaul Mackerras1-0/+2
The merged version follows the ppc64 version pretty closely mostly, and in fact ARCH=ppc64 now uses the arch/powerpc/xmon version. The main difference for ppc64 is that the 'p' command to call show_state (which was always pretty dodgy) has been replaced by the ppc32 'p' command, which calls a given procedure (so in fact the old 'p' command behaviour can be achieved with 'p $show_state'). Signed-off-by: Paul Mackerras <[email protected]>
2005-10-28powerpc: Make single-stepping emulation (mostly) usable on 32-bitPaul Mackerras1-0/+17
The sc instruction emulation can't be done the same way on 32-bit as 64-bit yet, but this should work OK. Signed-off-by: Paul Mackerras <[email protected]>
2005-10-28ppc64: use mem_64.S from powerpc/libStephen Rothwell1-2/+1
and remove the same bits from ppc64/lib/string.S. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use usercopy_64.c from powerpc/libStephen Rothwell1-2/+2
since it is identical to usercopy.c from ppc64/lib. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: user strcase.c from powerpc/libStephen Rothwell1-2/+3
since it is identical to strcase.c from ppc64/lib. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use sstep.c from powerpc/libStephen Rothwell1-1/+2
since it is identical to sstep.c from ppc64/lib. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use memcpy_64.S from powerpc/libStephen Rothwell1-3/+3
since it is identical to mempcy.S from ppc64/lib. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use lockc.c from powerpc/libStephen Rothwell1-3/+3
since it is effectively the same as locks.c from ppc64/lib. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use copyuser_64.S from powerpc/libStephen Rothwell1-2/+2
since it is identical to copyuser.S from ppc64/lib. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use copypage_64.S from powerpc/libStephen Rothwell1-2/+2
since it is identical to copypage.S from ppc64/lib. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use e2a.c from powerpc/libStephen Rothwell1-1/+1
since it is identical to e2a.c from ppc64/lib Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-28ppc64: use checksum_64.S from powerpcStephen Rothwell1-1/+4
as it is identical to checksum.S from ppc64. Signed-off-by: Stephen Rothwell <[email protected]>
2005-10-20powerpc: Fix a corner case in __div64_32Paul Mackerras1-1/+2
The code was incorrectly doing a division by 0 in the case where the denominator was 0x100000000 and the divisor was 0xffffffff. Thanks to Fred Liu of Motorola for pointing this out. Signed-off-by: Paul Mackerras <[email protected]>
2005-10-17ppc32: use L1_CACHE_SHIFT/L1_CACHE_BYTESStephen Rothwell1-12/+12
instead of L1_CACHE_LINE_SIZE and LG_L1_CACHE_LINE_SIZE Signed-off-by: Stephen Rothwell <[email protected]>
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