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* powerpc: EX_TABLE macro for exception tablesNicholas Piggin2016-11-141-33/+22
| | | | | | | | | | | | This macro is taken from s390, and allows more flexibility in changing exception table format. mpe: Put it in ppc_asm.h and only define one version using stringinfy_in_c(). Add some empty definitions and headers to keep the selftests happy. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* ppc: move exports to definitionsAl Viro2016-08-071-0/+5
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* powerpc: Make generic_memcpy() private to copy_32.SMichael Ellerman2016-04-111-1/+1
| | | | | | | | generic_memcpy() is only called from copy_32.S, so there's no reason for it to be global. Reported-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc32: memset: only use dcbz once cache is enabledLEROY Christophe2015-09-171-0/+6
| | | | | | | | | | | | | | | | | | memset() uses instruction dcbz to speed up clearing by not wasting time loading cache line with data that will be overwritten. Some platform like mpc52xx do no have cache active at startup and can therefore not use memset(). Allthough no part of the code explicitly uses memset(), GCC may make calls to it. This patch modifies memset() such that at startup, memset() unconditionally skip the optimised bloc that uses dcbz instruction. Once the initial MMU is set up, in machine_init() we patch memset() by replacing this inconditional jump by a NOP Tested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc32: memcpy: only use dcbz once cache is enabledLEROY Christophe2015-09-171-0/+5
| | | | | | | | | | | | | | | | | | | | memcpy() uses instruction dcbz to speed up copy by not wasting time loading cache line with data that will be overwritten. Some platform like mpc52xx do no have cache active at startup and can therefore not use memcpy(). Allthough no part of the code explicitly uses memcpy(), GCC makes calls to it. This patch modifies memcpy() such that at startup, memcpy() unconditionally jumps to generic_memcpy() which doesn't use the dcbz instruction. Once the initial MMU is set up, in machine_init() we patch memcpy() by replacing this inconditional jump by a NOP Reported-by: Michal Sojka <sojkam1@fel.cvut.cz> Tested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/32: Few optimisations in memcpyLEROY Christophe2015-08-071-5/+5
| | | | | | | | | This patch adds a few optimisations in memcpy functions by using lbzu/stbu instead of lxb/stb and by re-ordering insn inside a loop to reduce latency due to loading Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/32: cacheable_memcpy becomes memcpyLEROY Christophe2015-08-071-8/+8
| | | | | | | | | | | | | | | cacheable_memcpy uses dcbz instruction and is more efficient than memcpy when the destination is in RAM. If the destination is in an io area, memcpy_toio() is normally used, not memcpy This patch renames memcpy as generic_memcpy, and renames cacheable_memcpy as memcpy On MPC885, we get approximatly 7% increase of the transfer rate on an FTP reception Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/32: Merge the new memset() with the old oneLEROY Christophe2015-08-071-27/+7
| | | | | | | | cacheable_memzero() which has become the new memset() and the old memset() are quite similar, so just merge them. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc/32: memset(0): use cacheable_memzeroLEROY Christophe2015-08-071-4/+4
| | | | | | | | | | | | | | cacheable_memzero uses dcbz instruction and is more efficient than memset(0) when the destination is in RAM This patch renames memset as generic_memset, and defines memset as a prolog to cacheable_memzero. This prolog checks if the byte to set is 0. If not, it falls back to generic_memcpy() cacheable_memzero disappears as it is not referenced anywhere anymore Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <scottwood@freescale.com>
* Partially revert "powerpc: Remove duplicate cacheable_memcpy/memzero functions"LEROY Christophe2015-08-071-0/+127
| | | | | | | | | | | | | This partially reverts commit 'powerpc: Remove duplicate cacheable_memcpy/memzero functions ("b05ae4ee602b7dc90771408ccf0972e1b3801a35")' Functions cacheable_memcpy/memzero are more efficient than memcpy/memset as they use the dcbz instruction which avoids refill of the cacheline with the data that we will overwrite. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <scottwood@freescale.com>
* powerpc: Remove duplicate cacheable_memcpy/memzero functionsKyle Moffett2015-03-171-127/+0
| | | | | | | | | | | | These functions are only used from one place each. If the cacheable_* versions really are more efficient, then those changes should be migrated into the common code instead. NOTE: The old routines are just flat buggy on kernels that support hardware with different cacheline sizes. Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix incorrect .stabs entry for copy_32.SSean MacLennan2010-09-021-1/+1
| | | | | Signed-off-by: Sean MacLennan <smaclennan@pikatech.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/8xx: Start using dcbX instructions in various copy routinesJoakim Tjernlund2009-12-091-24/+0
| | | | | | | | Now that 8xx can fixup dcbX instructions, start using them where possible like every other PowerPc arch do. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* ppc32: use L1_CACHE_SHIFT/L1_CACHE_BYTESStephen Rothwell2005-10-171-12/+12
| | | | | | instead of L1_CACHE_LINE_SIZE and LG_L1_CACHE_LINE_SIZE Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* powerpc: Rename files to have consistent _32/_64 suffixesPaul Mackerras2005-10-101-0/+543
This doesn't change any code, just renames things so we consistently have foo_32.c and foo_64.c where we have separate 32- and 64-bit versions. Signed-off-by: Paul Mackerras <paulus@samba.org>
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