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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/arch/powerpc/lib/copyuser_64.S

612 строки
9.7 KiB
ArmAsm
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powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
/*
* Copyright (C) 2002 Paul Mackerras, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <asm/processor.h>
#include <asm/ppc_asm.h>
.align 7
_GLOBAL(__copy_tofrom_user)
/* first check for a whole page copy on a page boundary */
cmpldi cr1,r5,16
cmpdi cr6,r5,4096
or r0,r3,r4
neg r6,r3 /* LS 3 bits = # bytes to 8-byte dest bdry */
andi. r0,r0,4095
std r3,-24(r1)
crand cr0*4+2,cr0*4+2,cr6*4+2
std r4,-16(r1)
std r5,-8(r1)
dcbt 0,r4
[PATCH] ppc64: support 64k pages 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 <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 03:06:55 +03:00
beq .Lcopy_page_4K
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
andi. r6,r6,7
[POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=y 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 <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-03-22 17:34:13 +03:00
PPC_MTOCRF 0x01,r5
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
blt cr1,.Lshort_copy
powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD In exactly the same way that we updated memcpy() with new feature sections in commit 25d6e2d7c58ddc4a3b614fc5381591c0cfe66556 ("powerpc: Update 64bit memcpy() using CPU_FTR_UNALIGNED_LD_STD"), we do the same thing here for __copy_tofrom_user(). Once again this is purely a performance tweak for Cell and Power6 - this has no effect on all the other 64bit powerpc chips. We can make these same changes to __copy_tofrom_user() because the basic copy algorithm is the same as in memcpy() - this version just has all the exception handling logic needed when copying to or from userspace as well as a special case for copying whole 4K pages that are page aligned. CPU_FTR_UNALIGNED_LD_STD CPU was added in commit 4ec577a28980a0790df3c3dfe9c81f6e2222acfb ("powerpc: Add new CPU feature: CPU_FTR_UNALIGNED_LD_STD"). We also make the same simple one line change from cmpldi r1,... to cmpldi cr1,... for consistency. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-11 03:53:34 +03:00
/* Below we want to nop out the bne if we're on a CPU that has the
* CPU_FTR_UNALIGNED_LD_STD bit set and the CPU_FTR_CP_USE_DCBTZ bit
* cleared.
* At the time of writing the only CPU that has this combination of bits
* set is Power6.
*/
BEGIN_FTR_SECTION
nop
FTR_SECTION_ELSE
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
bne .Ldst_unaligned
powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD In exactly the same way that we updated memcpy() with new feature sections in commit 25d6e2d7c58ddc4a3b614fc5381591c0cfe66556 ("powerpc: Update 64bit memcpy() using CPU_FTR_UNALIGNED_LD_STD"), we do the same thing here for __copy_tofrom_user(). Once again this is purely a performance tweak for Cell and Power6 - this has no effect on all the other 64bit powerpc chips. We can make these same changes to __copy_tofrom_user() because the basic copy algorithm is the same as in memcpy() - this version just has all the exception handling logic needed when copying to or from userspace as well as a special case for copying whole 4K pages that are page aligned. CPU_FTR_UNALIGNED_LD_STD CPU was added in commit 4ec577a28980a0790df3c3dfe9c81f6e2222acfb ("powerpc: Add new CPU feature: CPU_FTR_UNALIGNED_LD_STD"). We also make the same simple one line change from cmpldi r1,... to cmpldi cr1,... for consistency. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-11 03:53:34 +03:00
ALT_FTR_SECTION_END(CPU_FTR_UNALIGNED_LD_STD | CPU_FTR_CP_USE_DCBTZ, \
CPU_FTR_UNALIGNED_LD_STD)
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
.Ldst_aligned:
addi r3,r3,-16
powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD In exactly the same way that we updated memcpy() with new feature sections in commit 25d6e2d7c58ddc4a3b614fc5381591c0cfe66556 ("powerpc: Update 64bit memcpy() using CPU_FTR_UNALIGNED_LD_STD"), we do the same thing here for __copy_tofrom_user(). Once again this is purely a performance tweak for Cell and Power6 - this has no effect on all the other 64bit powerpc chips. We can make these same changes to __copy_tofrom_user() because the basic copy algorithm is the same as in memcpy() - this version just has all the exception handling logic needed when copying to or from userspace as well as a special case for copying whole 4K pages that are page aligned. CPU_FTR_UNALIGNED_LD_STD CPU was added in commit 4ec577a28980a0790df3c3dfe9c81f6e2222acfb ("powerpc: Add new CPU feature: CPU_FTR_UNALIGNED_LD_STD"). We also make the same simple one line change from cmpldi r1,... to cmpldi cr1,... for consistency. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-11 03:53:34 +03:00
BEGIN_FTR_SECTION
andi. r0,r4,7
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
bne .Lsrc_unaligned
powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD In exactly the same way that we updated memcpy() with new feature sections in commit 25d6e2d7c58ddc4a3b614fc5381591c0cfe66556 ("powerpc: Update 64bit memcpy() using CPU_FTR_UNALIGNED_LD_STD"), we do the same thing here for __copy_tofrom_user(). Once again this is purely a performance tweak for Cell and Power6 - this has no effect on all the other 64bit powerpc chips. We can make these same changes to __copy_tofrom_user() because the basic copy algorithm is the same as in memcpy() - this version just has all the exception handling logic needed when copying to or from userspace as well as a special case for copying whole 4K pages that are page aligned. CPU_FTR_UNALIGNED_LD_STD CPU was added in commit 4ec577a28980a0790df3c3dfe9c81f6e2222acfb ("powerpc: Add new CPU feature: CPU_FTR_UNALIGNED_LD_STD"). We also make the same simple one line change from cmpldi r1,... to cmpldi cr1,... for consistency. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-11 03:53:34 +03:00
END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
srdi r7,r5,4
20: ld r9,0(r4)
addi r4,r4,-8
mtctr r7
andi. r5,r5,7
bf cr7*4+0,22f
addi r3,r3,8
addi r4,r4,8
mr r8,r9
blt cr1,72f
21: ld r9,8(r4)
70: std r8,8(r3)
22: ldu r8,16(r4)
71: stdu r9,16(r3)
bdnz 21b
72: std r8,8(r3)
beq+ 3f
addi r3,r3,16
.Ldo_tail:
bf cr7*4+1,1f
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
23: lwz r9,8(r4)
addi r4,r4,4
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
73: stw r9,0(r3)
addi r3,r3,4
1: bf cr7*4+2,2f
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
44: lhz r9,8(r4)
addi r4,r4,2
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
74: sth r9,0(r3)
addi r3,r3,2
2: bf cr7*4+3,3f
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
45: lbz r9,8(r4)
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
75: stb r9,0(r3)
3: li r3,0
blr
.Lsrc_unaligned:
srdi r6,r5,3
addi r5,r5,-16
subf r4,r0,r4
srdi r7,r5,4
sldi r10,r0,3
cmpldi cr6,r6,3
andi. r5,r5,7
mtctr r7
subfic r11,r10,64
add r5,r5,r0
bt cr7*4+0,28f
24: ld r9,0(r4) /* 3+2n loads, 2+2n stores */
25: ld r0,8(r4)
sld r6,r9,r10
26: ldu r9,16(r4)
srd r7,r0,r11
sld r8,r0,r10
or r7,r7,r6
blt cr6,79f
27: ld r0,8(r4)
b 2f
28: ld r0,0(r4) /* 4+2n loads, 3+2n stores */
29: ldu r9,8(r4)
sld r8,r0,r10
addi r3,r3,-8
blt cr6,5f
30: ld r0,8(r4)
srd r12,r9,r11
sld r6,r9,r10
31: ldu r9,16(r4)
or r12,r8,r12
srd r7,r0,r11
sld r8,r0,r10
addi r3,r3,16
beq cr6,78f
1: or r7,r7,r6
32: ld r0,8(r4)
76: std r12,8(r3)
2: srd r12,r9,r11
sld r6,r9,r10
33: ldu r9,16(r4)
or r12,r8,r12
77: stdu r7,16(r3)
srd r7,r0,r11
sld r8,r0,r10
bdnz 1b
78: std r12,8(r3)
or r7,r7,r6
79: std r7,16(r3)
5: srd r12,r9,r11
or r12,r8,r12
80: std r12,24(r3)
bne 6f
li r3,0
blr
6: cmpwi cr1,r5,8
addi r3,r3,32
sld r9,r9,r10
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
ble cr1,7f
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
34: ld r0,8(r4)
srd r7,r0,r11
or r9,r7,r9
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
7:
bf cr7*4+1,1f
rotldi r9,r9,32
94: stw r9,0(r3)
addi r3,r3,4
1: bf cr7*4+2,2f
rotldi r9,r9,16
95: sth r9,0(r3)
addi r3,r3,2
2: bf cr7*4+3,3f
rotldi r9,r9,8
96: stb r9,0(r3)
3: li r3,0
blr
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
.Ldst_unaligned:
[POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=y 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 <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-03-22 17:34:13 +03:00
PPC_MTOCRF 0x01,r6 /* put #bytes to 8B bdry into cr7 */
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
subf r5,r6,r5
li r7,0
powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD In exactly the same way that we updated memcpy() with new feature sections in commit 25d6e2d7c58ddc4a3b614fc5381591c0cfe66556 ("powerpc: Update 64bit memcpy() using CPU_FTR_UNALIGNED_LD_STD"), we do the same thing here for __copy_tofrom_user(). Once again this is purely a performance tweak for Cell and Power6 - this has no effect on all the other 64bit powerpc chips. We can make these same changes to __copy_tofrom_user() because the basic copy algorithm is the same as in memcpy() - this version just has all the exception handling logic needed when copying to or from userspace as well as a special case for copying whole 4K pages that are page aligned. CPU_FTR_UNALIGNED_LD_STD CPU was added in commit 4ec577a28980a0790df3c3dfe9c81f6e2222acfb ("powerpc: Add new CPU feature: CPU_FTR_UNALIGNED_LD_STD"). We also make the same simple one line change from cmpldi r1,... to cmpldi cr1,... for consistency. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-11-11 03:53:34 +03:00
cmpldi cr1,r5,16
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
bf cr7*4+3,1f
35: lbz r0,0(r4)
81: stb r0,0(r3)
addi r7,r7,1
1: bf cr7*4+2,2f
36: lhzx r0,r7,r4
82: sthx r0,r7,r3
addi r7,r7,2
2: bf cr7*4+1,3f
37: lwzx r0,r7,r4
83: stwx r0,r7,r3
[POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=y 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 <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-03-22 17:34:13 +03:00
3: PPC_MTOCRF 0x01,r5
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
add r4,r6,r4
add r3,r6,r3
b .Ldst_aligned
.Lshort_copy:
bf cr7*4+0,1f
38: lwz r0,0(r4)
39: lwz r9,4(r4)
addi r4,r4,8
84: stw r0,0(r3)
85: stw r9,4(r3)
addi r3,r3,8
1: bf cr7*4+1,2f
40: lwz r0,0(r4)
addi r4,r4,4
86: stw r0,0(r3)
addi r3,r3,4
2: bf cr7*4+2,3f
41: lhz r0,0(r4)
addi r4,r4,2
87: sth r0,0(r3)
addi r3,r3,2
3: bf cr7*4+3,4f
42: lbz r0,0(r4)
88: stb r0,0(r3)
4: li r3,0
blr
/*
* exception handlers follow
* we have to return the number of bytes not copied
* for an exception on a load, we set the rest of the destination to 0
*/
136:
137:
add r3,r3,r7
b 1f
130:
131:
addi r3,r3,8
120:
122:
124:
125:
126:
127:
128:
129:
133:
addi r3,r3,8
121:
132:
addi r3,r3,8
134:
135:
138:
139:
140:
141:
142:
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
123:
144:
145:
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
/*
* here we have had a fault on a load and r3 points to the first
* unmodified byte of the destination
*/
1: ld r6,-24(r1)
ld r4,-16(r1)
ld r5,-8(r1)
subf r6,r6,r3
add r4,r4,r6
subf r5,r6,r5 /* #bytes left to go */
/*
* first see if we can copy any more bytes before hitting another exception
*/
mtctr r5
43: lbz r0,0(r4)
addi r4,r4,1
89: stb r0,0(r3)
addi r3,r3,1
bdnz 43b
li r3,0 /* huh? all copied successfully this time? */
blr
/*
* here we have trapped again, need to clear ctr bytes starting at r3
*/
143: mfctr r5
li r0,0
mr r4,r3
mr r3,r5 /* return the number of bytes not copied */
1: andi. r9,r4,7
beq 3f
90: stb r0,0(r4)
addic. r5,r5,-1
addi r4,r4,1
bne 1b
blr
3: cmpldi cr1,r5,8
srdi r9,r5,3
andi. r5,r5,7
blt cr1,93f
mtctr r9
91: std r0,0(r4)
addi r4,r4,8
bdnz 91b
93: beqlr
mtctr r5
92: stb r0,0(r4)
addi r4,r4,1
bdnz 92b
blr
/*
* exception handlers for stores: we just need to work
* out how many bytes weren't copied
*/
182:
183:
add r3,r3,r7
b 1f
180:
addi r3,r3,8
171:
177:
addi r3,r3,8
170:
172:
176:
178:
addi r3,r3,4
185:
addi r3,r3,4
173:
174:
175:
179:
181:
184:
186:
187:
188:
189:
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
194:
195:
196:
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
1:
ld r6,-24(r1)
ld r5,-8(r1)
add r6,r6,r5
subf r3,r3,r6 /* #bytes not copied */
190:
191:
192:
blr /* #bytes not copied in r3 */
.section __ex_table,"a"
.align 3
.llong 20b,120b
.llong 21b,121b
.llong 70b,170b
.llong 22b,122b
.llong 71b,171b
.llong 72b,172b
.llong 23b,123b
.llong 73b,173b
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
.llong 44b,144b
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
.llong 74b,174b
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
.llong 45b,145b
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
.llong 75b,175b
.llong 24b,124b
.llong 25b,125b
.llong 26b,126b
.llong 27b,127b
.llong 28b,128b
.llong 29b,129b
.llong 30b,130b
.llong 31b,131b
.llong 32b,132b
.llong 76b,176b
.llong 33b,133b
.llong 77b,177b
.llong 78b,178b
.llong 79b,179b
.llong 80b,180b
.llong 34b,134b
powerpc: Fix 64bit __copy_tofrom_user() regression This fixes a regression introduced by commit a4e22f02f5b6518c1484faea1f88d81802b9feac ("powerpc: Update 64bit __copy_tofrom_user() using CPU_FTR_UNALIGNED_LD_STD"). The same bug that existed in the 64bit memcpy() also exists here so fix it here too. The fix is the same as that applied to memcpy() with the addition of fixes for the exception handling code required for __copy_tofrom_user(). This stops us reading beyond the end of the source region we were told to copy. Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-02-25 16:46:24 +03:00
.llong 94b,194b
.llong 95b,195b
.llong 96b,196b
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
.llong 35b,135b
.llong 81b,181b
.llong 36b,136b
.llong 82b,182b
.llong 37b,137b
.llong 83b,183b
.llong 38b,138b
.llong 39b,139b
.llong 84b,184b
.llong 85b,185b
.llong 40b,140b
.llong 86b,186b
.llong 41b,141b
.llong 87b,187b
.llong 42b,142b
.llong 88b,188b
.llong 43b,143b
.llong 89b,189b
.llong 90b,190b
.llong 91b,191b
.llong 92b,192b
.text
/*
* Routine to copy a whole page of data, optimized for POWER4.
* On POWER4 it is more than 50% faster than the simple loop
* above (following the .Ldst_aligned label) but it runs slightly
* slower on POWER3.
*/
[PATCH] ppc64: support 64k pages 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 <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 03:06:55 +03:00
.Lcopy_page_4K:
powerpc: Merge enough to start building in arch/powerpc. This creates the directory structure under arch/powerpc and a bunch of Kconfig files. It does a first-cut merge of arch/powerpc/mm, arch/powerpc/lib and arch/powerpc/platforms/powermac. This is enough to build a 32-bit powermac kernel with ARCH=powerpc. For now we are getting some unmerged files from arch/ppc/kernel and arch/ppc/syslib, or arch/ppc64/kernel. This makes some minor changes to files in those directories and files outside arch/powerpc. The boot directory is still not merged. That's going to be interesting. Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-09-26 10:04:21 +04:00
std r31,-32(1)
std r30,-40(1)
std r29,-48(1)
std r28,-56(1)
std r27,-64(1)
std r26,-72(1)
std r25,-80(1)
std r24,-88(1)
std r23,-96(1)
std r22,-104(1)
std r21,-112(1)
std r20,-120(1)
li r5,4096/32 - 1
addi r3,r3,-8
li r0,5
0: addi r5,r5,-24
mtctr r0
20: ld r22,640(4)
21: ld r21,512(4)
22: ld r20,384(4)
23: ld r11,256(4)
24: ld r9,128(4)
25: ld r7,0(4)
26: ld r25,648(4)
27: ld r24,520(4)
28: ld r23,392(4)
29: ld r10,264(4)
30: ld r8,136(4)
31: ldu r6,8(4)
cmpwi r5,24
1:
32: std r22,648(3)
33: std r21,520(3)
34: std r20,392(3)
35: std r11,264(3)
36: std r9,136(3)
37: std r7,8(3)
38: ld r28,648(4)
39: ld r27,520(4)
40: ld r26,392(4)
41: ld r31,264(4)
42: ld r30,136(4)
43: ld r29,8(4)
44: std r25,656(3)
45: std r24,528(3)
46: std r23,400(3)
47: std r10,272(3)
48: std r8,144(3)
49: std r6,16(3)
50: ld r22,656(4)
51: ld r21,528(4)
52: ld r20,400(4)
53: ld r11,272(4)
54: ld r9,144(4)
55: ld r7,16(4)
56: std r28,664(3)
57: std r27,536(3)
58: std r26,408(3)
59: std r31,280(3)
60: std r30,152(3)
61: stdu r29,24(3)
62: ld r25,664(4)
63: ld r24,536(4)
64: ld r23,408(4)
65: ld r10,280(4)
66: ld r8,152(4)
67: ldu r6,24(4)
bdnz 1b
68: std r22,648(3)
69: std r21,520(3)
70: std r20,392(3)
71: std r11,264(3)
72: std r9,136(3)
73: std r7,8(3)
74: addi r4,r4,640
75: addi r3,r3,648
bge 0b
mtctr r5
76: ld r7,0(4)
77: ld r8,8(4)
78: ldu r9,16(4)
3:
79: ld r10,8(4)
80: std r7,8(3)
81: ld r7,16(4)
82: std r8,16(3)
83: ld r8,24(4)
84: std r9,24(3)
85: ldu r9,32(4)
86: stdu r10,32(3)
bdnz 3b
4:
87: ld r10,8(4)
88: std r7,8(3)
89: std r8,16(3)
90: std r9,24(3)
91: std r10,32(3)
9: ld r20,-120(1)
ld r21,-112(1)
ld r22,-104(1)
ld r23,-96(1)
ld r24,-88(1)
ld r25,-80(1)
ld r26,-72(1)
ld r27,-64(1)
ld r28,-56(1)
ld r29,-48(1)
ld r30,-40(1)
ld r31,-32(1)
li r3,0
blr
/*
* on an exception, reset to the beginning and jump back into the
* standard __copy_tofrom_user
*/
100: ld r20,-120(1)
ld r21,-112(1)
ld r22,-104(1)
ld r23,-96(1)
ld r24,-88(1)
ld r25,-80(1)
ld r26,-72(1)
ld r27,-64(1)
ld r28,-56(1)
ld r29,-48(1)
ld r30,-40(1)
ld r31,-32(1)
ld r3,-24(r1)
ld r4,-16(r1)
li r5,4096
b .Ldst_aligned
.section __ex_table,"a"
.align 3
.llong 20b,100b
.llong 21b,100b
.llong 22b,100b
.llong 23b,100b
.llong 24b,100b
.llong 25b,100b
.llong 26b,100b
.llong 27b,100b
.llong 28b,100b
.llong 29b,100b
.llong 30b,100b
.llong 31b,100b
.llong 32b,100b
.llong 33b,100b
.llong 34b,100b
.llong 35b,100b
.llong 36b,100b
.llong 37b,100b
.llong 38b,100b
.llong 39b,100b
.llong 40b,100b
.llong 41b,100b
.llong 42b,100b
.llong 43b,100b
.llong 44b,100b
.llong 45b,100b
.llong 46b,100b
.llong 47b,100b
.llong 48b,100b
.llong 49b,100b
.llong 50b,100b
.llong 51b,100b
.llong 52b,100b
.llong 53b,100b
.llong 54b,100b
.llong 55b,100b
.llong 56b,100b
.llong 57b,100b
.llong 58b,100b
.llong 59b,100b
.llong 60b,100b
.llong 61b,100b
.llong 62b,100b
.llong 63b,100b
.llong 64b,100b
.llong 65b,100b
.llong 66b,100b
.llong 67b,100b
.llong 68b,100b
.llong 69b,100b
.llong 70b,100b
.llong 71b,100b
.llong 72b,100b
.llong 73b,100b
.llong 74b,100b
.llong 75b,100b
.llong 76b,100b
.llong 77b,100b
.llong 78b,100b
.llong 79b,100b
.llong 80b,100b
.llong 81b,100b
.llong 82b,100b
.llong 83b,100b
.llong 84b,100b
.llong 85b,100b
.llong 86b,100b
.llong 87b,100b
.llong 88b,100b
.llong 89b,100b
.llong 90b,100b
.llong 91b,100b