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-rw-r--r--arch/powerpc/lib/Makefile9
-rw-r--r--arch/powerpc/lib/checksum.S225
-rw-r--r--arch/powerpc/lib/checksum64.S229
-rw-r--r--arch/powerpc/lib/copy32.S543
-rw-r--r--arch/powerpc/lib/copypage.S121
-rw-r--r--arch/powerpc/lib/copyuser.S576
-rw-r--r--arch/powerpc/lib/div64.S58
-rw-r--r--arch/powerpc/lib/e2a.c108
-rw-r--r--arch/powerpc/lib/memcpy.S172
-rw-r--r--arch/powerpc/lib/rheap.c693
-rw-r--r--arch/powerpc/lib/sstep.c141
-rw-r--r--arch/powerpc/lib/strcase.c23
-rw-r--r--arch/powerpc/lib/string.S203
-rw-r--r--arch/powerpc/lib/usercopy.c41
14 files changed, 3142 insertions, 0 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
new file mode 100644
index 000000000000..347f9798e433
--- /dev/null
+++ b/arch/powerpc/lib/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for ppc-specific library files..
+#
+
+obj-y := strcase.o string.o
+obj-$(CONFIG_PPC32) += div64.o copy32.o checksum.o
+obj-$(CONFIG_PPC64) += copypage.o copyuser.o memcpy.o usercopy.o \
+ sstep.o checksum64.o
+obj-$(CONFIG_PPC_ISERIES) += e2a.o
diff --git a/arch/powerpc/lib/checksum.S b/arch/powerpc/lib/checksum.S
new file mode 100644
index 000000000000..7874e8a80455
--- /dev/null
+++ b/arch/powerpc/lib/checksum.S
@@ -0,0 +1,225 @@
+/*
+ * This file contains assembly-language implementations
+ * of IP-style 1's complement checksum routines.
+ *
+ * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ * 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.
+ *
+ * Severely hacked about by Paul Mackerras (paulus@cs.anu.edu.au).
+ */
+
+#include <linux/sys.h>
+#include <asm/processor.h>
+#include <asm/errno.h>
+#include <asm/ppc_asm.h>
+
+ .text
+
+/*
+ * ip_fast_csum(buf, len) -- Optimized for IP header
+ * len is in words and is always >= 5.
+ */
+_GLOBAL(ip_fast_csum)
+ lwz r0,0(r3)
+ lwzu r5,4(r3)
+ addic. r4,r4,-2
+ addc r0,r0,r5
+ mtctr r4
+ blelr-
+1: lwzu r4,4(r3)
+ adde r0,r0,r4
+ bdnz 1b
+ addze r0,r0 /* add in final carry */
+ rlwinm r3,r0,16,0,31 /* fold two halves together */
+ add r3,r0,r3
+ not r3,r3
+ srwi r3,r3,16
+ blr
+
+/*
+ * Compute checksum of TCP or UDP pseudo-header:
+ * csum_tcpudp_magic(saddr, daddr, len, proto, sum)
+ */
+_GLOBAL(csum_tcpudp_magic)
+ rlwimi r5,r6,16,0,15 /* put proto in upper half of len */
+ addc r0,r3,r4 /* add 4 32-bit words together */
+ adde r0,r0,r5
+ adde r0,r0,r7
+ addze r0,r0 /* add in final carry */
+ rlwinm r3,r0,16,0,31 /* fold two halves together */
+ add r3,r0,r3
+ not r3,r3
+ srwi r3,r3,16
+ blr
+
+/*
+ * computes the checksum of a memory block at buff, length len,
+ * and adds in "sum" (32-bit)
+ *
+ * csum_partial(buff, len, sum)
+ */
+_GLOBAL(csum_partial)
+ addic r0,r5,0
+ subi r3,r3,4
+ srwi. r6,r4,2
+ beq 3f /* if we're doing < 4 bytes */
+ andi. r5,r3,2 /* Align buffer to longword boundary */
+ beq+ 1f
+ lhz r5,4(r3) /* do 2 bytes to get aligned */
+ addi r3,r3,2
+ subi r4,r4,2
+ addc r0,r0,r5
+ srwi. r6,r4,2 /* # words to do */
+ beq 3f
+1: mtctr r6
+2: lwzu r5,4(r3) /* the bdnz has zero overhead, so it should */
+ adde r0,r0,r5 /* be unnecessary to unroll this loop */
+ bdnz 2b
+ andi. r4,r4,3
+3: cmpwi 0,r4,2
+ blt+ 4f
+ lhz r5,4(r3)
+ addi r3,r3,2
+ subi r4,r4,2
+ adde r0,r0,r5
+4: cmpwi 0,r4,1
+ bne+ 5f
+ lbz r5,4(r3)
+ slwi r5,r5,8 /* Upper byte of word */
+ adde r0,r0,r5
+5: addze r3,r0 /* add in final carry */
+ blr
+
+/*
+ * Computes the checksum of a memory block at src, length len,
+ * and adds in "sum" (32-bit), while copying the block to dst.
+ * If an access exception occurs on src or dst, it stores -EFAULT
+ * to *src_err or *dst_err respectively, and (for an error on
+ * src) zeroes the rest of dst.
+ *
+ * csum_partial_copy_generic(src, dst, len, sum, src_err, dst_err)
+ */
+_GLOBAL(csum_partial_copy_generic)
+ addic r0,r6,0
+ subi r3,r3,4
+ subi r4,r4,4
+ srwi. r6,r5,2
+ beq 3f /* if we're doing < 4 bytes */
+ andi. r9,r4,2 /* Align dst to longword boundary */
+ beq+ 1f
+81: lhz r6,4(r3) /* do 2 bytes to get aligned */
+ addi r3,r3,2
+ subi r5,r5,2
+91: sth r6,4(r4)
+ addi r4,r4,2
+ addc r0,r0,r6
+ srwi. r6,r5,2 /* # words to do */
+ beq 3f
+1: srwi. r6,r5,4 /* # groups of 4 words to do */
+ beq 10f
+ mtctr r6
+71: lwz r6,4(r3)
+72: lwz r9,8(r3)
+73: lwz r10,12(r3)
+74: lwzu r11,16(r3)
+ adde r0,r0,r6
+75: stw r6,4(r4)
+ adde r0,r0,r9
+76: stw r9,8(r4)
+ adde r0,r0,r10
+77: stw r10,12(r4)
+ adde r0,r0,r11
+78: stwu r11,16(r4)
+ bdnz 71b
+10: rlwinm. r6,r5,30,30,31 /* # words left to do */
+ beq 13f
+ mtctr r6
+82: lwzu r9,4(r3)
+92: stwu r9,4(r4)
+ adde r0,r0,r9
+ bdnz 82b
+13: andi. r5,r5,3
+3: cmpwi 0,r5,2
+ blt+ 4f
+83: lhz r6,4(r3)
+ addi r3,r3,2
+ subi r5,r5,2
+93: sth r6,4(r4)
+ addi r4,r4,2
+ adde r0,r0,r6
+4: cmpwi 0,r5,1
+ bne+ 5f
+84: lbz r6,4(r3)
+94: stb r6,4(r4)
+ slwi r6,r6,8 /* Upper byte of word */
+ adde r0,r0,r6
+5: addze r3,r0 /* add in final carry */
+ blr
+
+/* These shouldn't go in the fixup section, since that would
+ cause the ex_table addresses to get out of order. */
+
+src_error_4:
+ mfctr r6 /* update # bytes remaining from ctr */
+ rlwimi r5,r6,4,0,27
+ b 79f
+src_error_1:
+ li r6,0
+ subi r5,r5,2
+95: sth r6,4(r4)
+ addi r4,r4,2
+79: srwi. r6,r5,2
+ beq 3f
+ mtctr r6
+src_error_2:
+ li r6,0
+96: stwu r6,4(r4)
+ bdnz 96b
+3: andi. r5,r5,3
+ beq src_error
+src_error_3:
+ li r6,0
+ mtctr r5
+ addi r4,r4,3
+97: stbu r6,1(r4)
+ bdnz 97b
+src_error:
+ cmpwi 0,r7,0
+ beq 1f
+ li r6,-EFAULT
+ stw r6,0(r7)
+1: addze r3,r0
+ blr
+
+dst_error:
+ cmpwi 0,r8,0
+ beq 1f
+ li r6,-EFAULT
+ stw r6,0(r8)
+1: addze r3,r0
+ blr
+
+.section __ex_table,"a"
+ .long 81b,src_error_1
+ .long 91b,dst_error
+ .long 71b,src_error_4
+ .long 72b,src_error_4
+ .long 73b,src_error_4
+ .long 74b,src_error_4
+ .long 75b,dst_error
+ .long 76b,dst_error
+ .long 77b,dst_error
+ .long 78b,dst_error
+ .long 82b,src_error_2
+ .long 92b,dst_error
+ .long 83b,src_error_3
+ .long 93b,dst_error
+ .long 84b,src_error_3
+ .long 94b,dst_error
+ .long 95b,dst_error
+ .long 96b,dst_error
+ .long 97b,dst_error
diff --git a/arch/powerpc/lib/checksum64.S b/arch/powerpc/lib/checksum64.S
new file mode 100644
index 000000000000..ef96c6c58efc
--- /dev/null
+++ b/arch/powerpc/lib/checksum64.S
@@ -0,0 +1,229 @@
+/*
+ * This file contains assembly-language implementations
+ * of IP-style 1's complement checksum routines.
+ *
+ * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ * 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.
+ *
+ * Severely hacked about by Paul Mackerras (paulus@cs.anu.edu.au).
+ */
+
+#include <linux/sys.h>
+#include <asm/processor.h>
+#include <asm/errno.h>
+#include <asm/ppc_asm.h>
+
+/*
+ * ip_fast_csum(r3=buf, r4=len) -- Optimized for IP header
+ * len is in words and is always >= 5.
+ *
+ * In practice len == 5, but this is not guaranteed. So this code does not
+ * attempt to use doubleword instructions.
+ */
+_GLOBAL(ip_fast_csum)
+ lwz r0,0(r3)
+ lwzu r5,4(r3)
+ addic. r4,r4,-2
+ addc r0,r0,r5
+ mtctr r4
+ blelr-
+1: lwzu r4,4(r3)
+ adde r0,r0,r4
+ bdnz 1b
+ addze r0,r0 /* add in final carry */
+ rldicl r4,r0,32,0 /* fold two 32-bit halves together */
+ add r0,r0,r4
+ srdi r0,r0,32
+ rlwinm r3,r0,16,0,31 /* fold two halves together */
+ add r3,r0,r3
+ not r3,r3
+ srwi r3,r3,16
+ blr
+
+/*
+ * Compute checksum of TCP or UDP pseudo-header:
+ * csum_tcpudp_magic(r3=saddr, r4=daddr, r5=len, r6=proto, r7=sum)
+ * No real gain trying to do this specially for 64 bit, but
+ * the 32 bit addition may spill into the upper bits of
+ * the doubleword so we still must fold it down from 64.
+ */
+_GLOBAL(csum_tcpudp_magic)
+ rlwimi r5,r6,16,0,15 /* put proto in upper half of len */
+ addc r0,r3,r4 /* add 4 32-bit words together */
+ adde r0,r0,r5
+ adde r0,r0,r7
+ rldicl r4,r0,32,0 /* fold 64 bit value */
+ add r0,r4,r0
+ srdi r0,r0,32
+ rlwinm r3,r0,16,0,31 /* fold two halves together */
+ add r3,r0,r3
+ not r3,r3
+ srwi r3,r3,16
+ blr
+
+/*
+ * Computes the checksum of a memory block at buff, length len,
+ * and adds in "sum" (32-bit).
+ *
+ * This code assumes at least halfword alignment, though the length
+ * can be any number of bytes. The sum is accumulated in r5.
+ *
+ * csum_partial(r3=buff, r4=len, r5=sum)
+ */
+_GLOBAL(csum_partial)
+ subi r3,r3,8 /* we'll offset by 8 for the loads */
+ srdi. r6,r4,3 /* divide by 8 for doubleword count */
+ addic r5,r5,0 /* clear carry */
+ beq 3f /* if we're doing < 8 bytes */
+ andi. r0,r3,2 /* aligned on a word boundary already? */
+ beq+ 1f
+ lhz r6,8(r3) /* do 2 bytes to get aligned */
+ addi r3,r3,2
+ subi r4,r4,2
+ addc r5,r5,r6
+ srdi. r6,r4,3 /* recompute number of doublewords */
+ beq 3f /* any left? */
+1: mtctr r6
+2: ldu r6,8(r3) /* main sum loop */
+ adde r5,r5,r6
+ bdnz 2b
+ andi. r4,r4,7 /* compute bytes left to sum after doublewords */
+3: cmpwi 0,r4,4 /* is at least a full word left? */
+ blt 4f
+ lwz r6,8(r3) /* sum this word */
+ addi r3,r3,4
+ subi r4,r4,4
+ adde r5,r5,r6
+4: cmpwi 0,r4,2 /* is at least a halfword left? */
+ blt+ 5f
+ lhz r6,8(r3) /* sum this halfword */
+ addi r3,r3,2
+ subi r4,r4,2
+ adde r5,r5,r6
+5: cmpwi 0,r4,1 /* is at least a byte left? */
+ bne+ 6f
+ lbz r6,8(r3) /* sum this byte */
+ slwi r6,r6,8 /* this byte is assumed to be the upper byte of a halfword */
+ adde r5,r5,r6
+6: addze r5,r5 /* add in final carry */
+ rldicl r4,r5,32,0 /* fold two 32-bit halves together */
+ add r3,r4,r5
+ srdi r3,r3,32
+ blr
+
+/*
+ * Computes the checksum of a memory block at src, length len,
+ * and adds in "sum" (32-bit), while copying the block to dst.
+ * If an access exception occurs on src or dst, it stores -EFAULT
+ * to *src_err or *dst_err respectively, and (for an error on
+ * src) zeroes the rest of dst.
+ *
+ * This code needs to be reworked to take advantage of 64 bit sum+copy.
+ * However, due to tokenring halfword alignment problems this will be very
+ * tricky. For now we'll leave it until we instrument it somehow.
+ *
+ * csum_partial_copy_generic(r3=src, r4=dst, r5=len, r6=sum, r7=src_err, r8=dst_err)
+ */
+_GLOBAL(csum_partial_copy_generic)
+ addic r0,r6,0
+ subi r3,r3,4
+ subi r4,r4,4
+ srwi. r6,r5,2
+ beq 3f /* if we're doing < 4 bytes */
+ andi. r9,r4,2 /* Align dst to longword boundary */
+ beq+ 1f
+81: lhz r6,4(r3) /* do 2 bytes to get aligned */
+ addi r3,r3,2
+ subi r5,r5,2
+91: sth r6,4(r4)
+ addi r4,r4,2
+ addc r0,r0,r6
+ srwi. r6,r5,2 /* # words to do */
+ beq 3f
+1: mtctr r6
+82: lwzu r6,4(r3) /* the bdnz has zero overhead, so it should */
+92: stwu r6,4(r4) /* be unnecessary to unroll this loop */
+ adde r0,r0,r6
+ bdnz 82b
+ andi. r5,r5,3
+3: cmpwi 0,r5,2
+ blt+ 4f
+83: lhz r6,4(r3)
+ addi r3,r3,2
+ subi r5,r5,2
+93: sth r6,4(r4)
+ addi r4,r4,2
+ adde r0,r0,r6
+4: cmpwi 0,r5,1
+ bne+ 5f
+84: lbz r6,4(r3)
+94: stb r6,4(r4)
+ slwi r6,r6,8 /* Upper byte of word */
+ adde r0,r0,r6
+5: addze r3,r0 /* add in final carry (unlikely with 64-bit regs) */
+ rldicl r4,r3,32,0 /* fold 64 bit value */
+ add r3,r4,r3
+ srdi r3,r3,32
+ blr
+
+/* These shouldn't go in the fixup section, since that would
+ cause the ex_table addresses to get out of order. */
+
+ .globl src_error_1
+src_error_1:
+ li r6,0
+ subi r5,r5,2
+95: sth r6,4(r4)
+ addi r4,r4,2
+ srwi. r6,r5,2
+ beq 3f
+ mtctr r6
+ .globl src_error_2
+src_error_2:
+ li r6,0
+96: stwu r6,4(r4)
+ bdnz 96b
+3: andi. r5,r5,3
+ beq src_error
+ .globl src_error_3
+src_error_3:
+ li r6,0
+ mtctr r5
+ addi r4,r4,3
+97: stbu r6,1(r4)
+ bdnz 97b
+ .globl src_error
+src_error:
+ cmpdi 0,r7,0
+ beq 1f
+ li r6,-EFAULT
+ stw r6,0(r7)
+1: addze r3,r0
+ blr
+
+ .globl dst_error
+dst_error:
+ cmpdi 0,r8,0
+ beq 1f
+ li r6,-EFAULT
+ stw r6,0(r8)
+1: addze r3,r0
+ blr
+
+.section __ex_table,"a"
+ .align 3
+ .llong 81b,src_error_1
+ .llong 91b,dst_error
+ .llong 82b,src_error_2
+ .llong 92b,dst_error
+ .llong 83b,src_error_3
+ .llong 93b,dst_error
+ .llong 84b,src_error_3
+ .llong 94b,dst_error
+ .llong 95b,dst_error
+ .llong 96b,dst_error
+ .llong 97b,dst_error
diff --git a/arch/powerpc/lib/copy32.S b/arch/powerpc/lib/copy32.S
new file mode 100644
index 000000000000..420a912198a2
--- /dev/null
+++ b/arch/powerpc/lib/copy32.S
@@ -0,0 +1,543 @@
+/*
+ * Memory copy functions for 32-bit PowerPC.
+ *
+ * Copyright (C) 1996-2005 Paul Mackerras.
+ *
+ * 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 <linux/config.h>
+#include <asm/processor.h>
+#include <asm/cache.h>
+#include <asm/errno.h>
+#include <asm/ppc_asm.h>
+
+#define COPY_16_BYTES \
+ lwz r7,4(r4); \
+ lwz r8,8(r4); \
+ lwz r9,12(r4); \
+ lwzu r10,16(r4); \
+ stw r7,4(r6); \
+ stw r8,8(r6); \
+ stw r9,12(r6); \
+ stwu r10,16(r6)
+
+#define COPY_16_BYTES_WITHEX(n) \
+8 ## n ## 0: \
+ lwz r7,4(r4); \
+8 ## n ## 1: \
+ lwz r8,8(r4); \
+8 ## n ## 2: \
+ lwz r9,12(r4); \
+8 ## n ## 3: \
+ lwzu r10,16(r4); \
+8 ## n ## 4: \
+ stw r7,4(r6); \
+8 ## n ## 5: \
+ stw r8,8(r6); \
+8 ## n ## 6: \
+ stw r9,12(r6); \
+8 ## n ## 7: \
+ stwu r10,16(r6)
+
+#define COPY_16_BYTES_EXCODE(n) \
+9 ## n ## 0: \
+ addi r5,r5,-(16 * n); \
+ b 104f; \
+9 ## n ## 1: \
+ addi r5,r5,-(16 * n); \
+ b 105f; \
+.section __ex_table,"a"; \
+ .align 2; \
+ .long 8 ## n ## 0b,9 ## n ## 0b; \
+ .long 8 ## n ## 1b,9 ## n ## 0b; \
+ .long 8 ## n ## 2b,9 ## n ## 0b; \
+ .long 8 ## n ## 3b,9 ## n ## 0b; \
+ .long 8 ## n ## 4b,9 ## n ## 1b; \
+ .long 8 ## n ## 5b,9 ## n ## 1b; \
+ .long 8 ## n ## 6b,9 ## n ## 1b; \
+ .long 8 ## n ## 7b,9 ## n ## 1b; \
+ .text
+
+ .text
+ .stabs "arch/powerpc/lib/",N_SO,0,0,0f
+ .stabs "copy32.S",N_SO,0,0,0f
+0:
+
+CACHELINE_BYTES = L1_CACHE_LINE_SIZE
+LG_CACHELINE_BYTES = LG_L1_CACHE_LINE_SIZE
+CACHELINE_MASK = (L1_CACHE_LINE_SIZE-1)
+
+/*
+ * Use dcbz on the complete cache lines in the destination
+ * to set them to zero. This requires that the destination
+ * area is cacheable. -- paulus
+ */
+_GLOBAL(cacheable_memzero)
+ mr r5,r4
+ li r4,0
+ addi r6,r3,-4
+ cmplwi 0,r5,4
+ blt 7f
+ stwu r4,4(r6)
+ beqlr
+ andi. r0,r6,3
+ add r5,r0,r5
+ subf r6,r0,r6
+ clrlwi r7,r6,32-LG_CACHELINE_BYTES
+ add r8,r7,r5
+ srwi r9,r8,LG_CACHELINE_BYTES
+ addic. r9,r9,-1 /* total number of complete cachelines */
+ ble 2f
+ xori r0,r7,CACHELINE_MASK & ~3
+ srwi. r0,r0,2
+ beq 3f
+ mtctr r0
+4: stwu r4,4(r6)
+ bdnz 4b
+3: mtctr r9
+ li r7,4
+#if !defined(CONFIG_8xx)
+10: dcbz r7,r6
+#else
+10: stw r4, 4(r6)
+ stw r4, 8(r6)
+ stw r4, 12(r6)
+ stw r4, 16(r6)
+#if CACHE_LINE_SIZE >= 32
+ stw r4, 20(r6)
+ stw r4, 24(r6)
+ stw r4, 28(r6)
+ stw r4, 32(r6)
+#endif /* CACHE_LINE_SIZE */
+#endif
+ addi r6,r6,CACHELINE_BYTES
+ bdnz 10b
+ clrlwi r5,r8,32-LG_CACHELINE_BYTES
+ addi r5,r5,4
+2: srwi r0,r5,2
+ mtctr r0
+ bdz 6f
+1: stwu r4,4(r6)
+ bdnz 1b
+6: andi. r5,r5,3
+7: cmpwi 0,r5,0
+ beqlr
+ mtctr r5
+ addi r6,r6,3
+8: stbu r4,1(r6)
+ bdnz 8b
+ blr
+
+_GLOBAL(memset)
+ rlwimi r4,r4,8,16,23
+ rlwimi r4,r4,16,0,15
+ addi r6,r3,-4
+ cmplwi 0,r5,4
+ blt 7f
+ stwu r4,4(r6)
+ beqlr
+ andi. r0,r6,3
+ add r5,r0,r5
+ subf r6,r0,r6
+ srwi r0,r5,2
+ mtctr r0
+ bdz 6f
+1: stwu r4,4(r6)
+ bdnz 1b
+6: andi. r5,r5,3
+7: cmpwi 0,r5,0
+ beqlr
+ mtctr r5
+ addi r6,r6,3
+8: stbu r4,1(r6)
+ bdnz 8b
+ blr
+
+/*
+ * This version uses dcbz on the complete cache lines in the
+ * destination area to reduce memory traffic. This requires that
+ * the destination area is cacheable.
+ * We only use this version if the source and dest don't overlap.
+ * -- paulus.
+ */
+_GLOBAL(cacheable_memcpy)
+ add r7,r3,r5 /* test if the src & dst overlap */
+ add r8,r4,r5
+ cmplw 0,r4,r7
+ cmplw 1,r3,r8
+ crand 0,0,4 /* cr0.lt &= cr1.lt */
+ blt memcpy /* if regions overlap */
+
+ addi r4,r4,-4
+ addi r6,r3,-4
+ neg r0,r3
+ andi. r0,r0,CACHELINE_MASK /* # bytes to start of cache line */
+ beq 58f
+
+ cmplw 0,r5,r0 /* is this more than total to do? */
+ blt 63f /* if not much to do */
+ andi. r8,r0,3 /* get it word-aligned first */
+ subf r5,r0,r5
+ mtctr r8
+ beq+ 61f
+70: lbz r9,4(r4) /* do some bytes */
+ stb r9,4(r6)
+ addi r4,r4,1
+ addi r6,r6,1
+ bdnz 70b
+61: srwi. r0,r0,2
+ mtctr r0
+ beq 58f
+72: lwzu r9,4(r4) /* do some words */
+ stwu r9,4(r6)
+ bdnz 72b
+
+58: srwi. r0,r5,LG_CACHELINE_BYTES /* # complete cachelines */
+ clrlwi r5,r5,32-LG_CACHELINE_BYTES
+ li r11,4
+ mtctr r0
+ beq 63f
+53:
+#if !defined(CONFIG_8xx)
+ dcbz r11,r6
+#endif
+ COPY_16_BYTES
+#if L1_CACHE_LINE_SIZE >= 32
+ COPY_16_BYTES
+#if L1_CACHE_LINE_SIZE >= 64
+ COPY_16_BYTES
+ COPY_16_BYTES
+#if L1_CACHE_LINE_SIZE >= 128
+ COPY_16_BYTES
+ COPY_16_BYTES
+ COPY_16_BYTES
+ COPY_16_BYTES
+#endif
+#endif
+#endif
+ bdnz 53b
+
+63: srwi. r0,r5,2
+ mtctr r0
+ beq 64f
+30: lwzu r0,4(r4)
+ stwu r0,4(r6)
+ bdnz 30b
+
+64: andi. r0,r5,3
+ mtctr r0
+ beq+ 65f
+40: lbz r0,4(r4)
+ stb r0,4(r6)
+ addi r4,r4,1
+ addi r6,r6,1
+ bdnz 40b
+65: blr
+
+_GLOBAL(memmove)
+ cmplw 0,r3,r4
+ bgt backwards_memcpy
+ /* fall through */
+
+_GLOBAL(memcpy)
+ srwi. r7,r5,3
+ addi r6,r3,-4
+ addi r4,r4,-4
+ beq 2f /* if less than 8 bytes to do */
+ andi. r0,r6,3 /* get dest word aligned */
+ mtctr r7
+ bne 5f
+1: lwz r7,4(r4)
+ lwzu r8,8(r4)
+ stw r7,4(r6)
+ stwu r8,8(r6)
+ bdnz 1b
+ andi. r5,r5,7
+2: cmplwi 0,r5,4
+ blt 3f
+ lwzu r0,4(r4)
+ addi r5,r5,-4
+ stwu r0,4(r6)
+3: cmpwi 0,r5,0
+ beqlr
+ mtctr r5
+ addi r4,r4,3
+ addi r6,r6,3
+4: lbzu r0,1(r4)
+ stbu r0,1(r6)
+ bdnz 4b
+ blr
+5: subfic r0,r0,4
+ mtctr r0
+6: lbz r7,4(r4)
+ addi r4,r4,1
+ stb r7,4(r6)
+ addi r6,r6,1
+ bdnz 6b
+ subf r5,r0,r5
+ rlwinm. r7,r5,32-3,3,31
+ beq 2b
+ mtctr r7
+ b 1b
+
+_GLOBAL(backwards_memcpy)
+ rlwinm. r7,r5,32-3,3,31 /* r0 = r5 >> 3 */
+ add r6,r3,r5
+ add r4,r4,r5
+ beq 2f
+ andi. r0,r6,3
+ mtctr r7
+ bne 5f
+1: lwz r7,-4(r4)
+ lwzu r8,-8(r4)
+ stw r7,-4(r6)
+ stwu r8,-8(r6)
+ bdnz 1b
+ andi. r5,r5,7
+2: cmplwi 0,r5,4
+ blt 3f
+ lwzu r0,-4(r4)
+ subi r5,r5,4
+ stwu r0,-4(r6)
+3: cmpwi 0,r5,0
+ beqlr
+ mtctr r5
+4: lbzu r0,-1(r4)
+ stbu r0,-1(r6)
+ bdnz 4b
+ blr
+5: mtctr r0
+6: lbzu r7,-1(r4)
+ stbu r7,-1(r6)
+ bdnz 6b
+ subf r5,r0,r5
+ rlwinm. r7,r5,32-3,3,31
+ beq 2b
+ mtctr r7
+ b 1b
+
+_GLOBAL(__copy_tofrom_user)
+ addi r4,r4,-4
+ addi r6,r3,-4
+ neg r0,r3
+ andi. r0,r0,CACHELINE_MASK /* # bytes to start of cache line */
+ beq 58f
+
+ cmplw 0,r5,r0 /* is this more than total to do? */
+ blt 63f /* if not much to do */
+ andi. r8,r0,3 /* get it word-aligned first */
+ mtctr r8
+ beq+ 61f
+70: lbz r9,4(r4) /* do some bytes */
+71: stb r9,4(r6)
+ addi r4,r4,1
+ addi r6,r6,1
+ bdnz 70b
+61: subf r5,r0,r5
+ srwi. r0,r0,2
+ mtctr r0
+ beq 58f
+72: lwzu r9,4(r4) /* do some words */
+73: stwu r9,4(r6)
+ bdnz 72b
+
+ .section __ex_table,"a"
+ .align 2
+ .long 70b,100f
+ .long 71b,101f
+ .long 72b,102f
+ .long 73b,103f
+ .text
+
+58: srwi. r0,r5,LG_CACHELINE_BYTES /* # complete cachelines */
+ clrlwi r5,r5,32-LG_CACHELINE_BYTES
+ li r11,4
+ beq 63f
+
+#ifdef CONFIG_8xx
+ /* Don't use prefetch on 8xx */
+ mtctr r0
+ li r0,0
+53: COPY_16_BYTES_WITHEX(0)
+ bdnz 53b
+
+#else /* not CONFIG_8xx */
+ /* Here we decide how far ahead to prefetch the source */
+ li r3,4
+ cmpwi r0,1
+ li r7,0
+ ble 114f
+ li r7,1
+#if MAX_COPY_PREFETCH > 1
+ /* Heuristically, for large transfers we prefetch
+ MAX_COPY_PREFETCH cachelines ahead. For small transfers
+ we prefetch 1 cacheline ahead. */
+ cmpwi r0,MAX_COPY_PREFETCH
+ ble 112f
+ li r7,MAX_COPY_PREFETCH
+112: mtctr r7
+111: dcbt r3,r4
+ addi r3,r3,CACHELINE_BYTES
+ bdnz 111b
+#else
+ dcbt r3,r4
+ addi r3,r3,CACHELINE_BYTES
+#endif /* MAX_COPY_PREFETCH > 1 */
+
+114: subf r8,r7,r0
+ mr r0,r7
+ mtctr r8
+
+53: dcbt r3,r4
+54: dcbz r11,r6
+ .section __ex_table,"a"
+ .align 2
+ .long 54b,105f
+ .text
+/* the main body of the cacheline loop */
+ COPY_16_BYTES_WITHEX(0)
+#if L1_CACHE_LINE_SIZE >= 32
+ COPY_16_BYTES_WITHEX(1)
+#if L1_CACHE_LINE_SIZE >= 64
+ COPY_16_BYTES_WITHEX(2)
+ COPY_16_BYTES_WITHEX(3)
+#if L1_CACHE_LINE_SIZE >= 128
+ COPY_16_BYTES_WITHEX(4)
+ COPY_16_BYTES_WITHEX(5)
+ COPY_16_BYTES_WITHEX(6)
+ COPY_16_BYTES_WITHEX(7)
+#endif
+#endif
+#endif
+ bdnz 53b
+ cmpwi r0,0
+ li r3,4
+ li r7,0
+ bne 114b
+#endif /* CONFIG_8xx */
+
+63: srwi. r0,r5,2
+ mtctr r0
+ beq 64f
+30: lwzu r0,4(r4)
+31: stwu r0,4(r6)
+ bdnz 30b
+
+64: andi. r0,r5,3
+ mtctr r0
+ beq+ 65f
+40: lbz r0,4(r4)
+41: stb r0,4(r6)
+ addi r4,r4,1
+ addi r6,r6,1
+ bdnz 40b
+65: li r3,0
+ blr
+
+/* read fault, initial single-byte copy */
+100: li r9,0
+ b 90f
+/* write fault, initial single-byte copy */
+101: li r9,1
+90: subf r5,r8,r5
+ li r3,0
+ b 99f
+/* read fault, initial word copy */
+102: li r9,0
+ b 91f
+/* write fault, initial word copy */
+103: li r9,1
+91: li r3,2
+ b 99f
+
+/*
+ * this stuff handles faults in the cacheline loop and branches to either
+ * 104f (if in read part) or 105f (if in write part), after updating r5
+ */
+ COPY_16_BYTES_EXCODE(0)
+#if L1_CACHE_LINE_SIZE >= 32
+ COPY_16_BYTES_EXCODE(1)
+#if L1_CACHE_LINE_SIZE >= 64
+ COPY_16_BYTES_EXCODE(2)
+ COPY_16_BYTES_EXCODE(3)
+#if L1_CACHE_LINE_SIZE >= 128
+ COPY_16_BYTES_EXCODE(4)
+ COPY_16_BYTES_EXCODE(5)
+ COPY_16_BYTES_EXCODE(6)
+ COPY_16_BYTES_EXCODE(7)
+#endif
+#endif
+#endif
+
+/* read fault in cacheline loop */
+104: li r9,0
+ b 92f
+/* fault on dcbz (effectively a write fault) */
+/* or write fault in cacheline loop */
+105: li r9,1
+92: li r3,LG_CACHELINE_BYTES
+ mfctr r8
+ add r0,r0,r8
+ b 106f
+/* read fault in final word loop */
+108: li r9,0
+ b 93f
+/* write fault in final word loop */
+109: li r9,1
+93: andi. r5,r5,3
+ li r3,2
+ b 99f
+/* read fault in final byte loop */
+110: li r9,0
+ b 94f
+/* write fault in final byte loop */
+111: li r9,1
+94: li r5,0
+ li r3,0
+/*
+ * At this stage the number of bytes not copied is
+ * r5 + (ctr << r3), and r9 is 0 for read or 1 for write.
+ */
+99: mfctr r0
+106: slw r3,r0,r3
+ add. r3,r3,r5
+ beq 120f /* shouldn't happen */
+ cmpwi 0,r9,0
+ bne 120f
+/* for a read fault, first try to continue the copy one byte at a time */
+ mtctr r3
+130: lbz r0,4(r4)
+131: stb r0,4(r6)
+ addi r4,r4,1
+ addi r6,r6,1
+ bdnz 130b
+/* then clear out the destination: r3 bytes starting at 4(r6) */
+132: mfctr r3
+ srwi. r0,r3,2
+ li r9,0
+ mtctr r0
+ beq 113f
+112: stwu r9,4(r6)
+ bdnz 112b
+113: andi. r0,r3,3
+ mtctr r0
+ beq 120f
+114: stb r9,4(r6)
+ addi r6,r6,1
+ bdnz 114b
+120: blr
+
+ .section __ex_table,"a"
+ .align 2
+ .long 30b,108b
+ .long 31b,109b
+ .long 40b,110b
+ .long 41b,111b
+ .long 130b,132b
+ .long 131b,120b
+ .long 112b,120b
+ .long 114b,120b
+ .text
diff --git a/arch/powerpc/lib/copypage.S b/arch/powerpc/lib/copypage.S
new file mode 100644
index 000000000000..733d61618bbf
--- /dev/null
+++ b/arch/powerpc/lib/copypage.S
@@ -0,0 +1,121 @@
+/*
+ * arch/ppc64/lib/copypage.S
+ *
+ * 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>
+
+_GLOBAL(copy_page)
+ std r31,-8(1)
+ std r30,-16(1)
+ std r29,-24(1)
+ std r28,-32(1)
+ std r27,-40(1)
+ std r26,-48(1)
+ std r25,-56(1)
+ std r24,-64(1)
+ std r23,-72(1)
+ std r22,-80(1)
+ std r21,-88(1)
+ std r20,-96(1)
+ li r5,4096/32 - 1
+ addi r3,r3,-8
+ li r12,5
+0: addi r5,r5,-24
+ mtctr r12
+ ld r22,640(4)
+ ld r21,512(4)
+ ld r20,384(4)
+ ld r11,256(4)
+ ld r9,128(4)
+ ld r7,0(4)
+ ld r25,648(4)
+ ld r24,520(4)
+ ld r23,392(4)
+ ld r10,264(4)
+ ld r8,136(4)
+ ldu r6,8(4)
+ cmpwi r5,24
+1: std r22,648(3)
+ std r21,520(3)
+ std r20,392(3)
+ std r11,264(3)
+ std r9,136(3)
+ std r7,8(3)
+ ld r28,648(4)
+ ld r27,520(4)
+ ld r26,392(4)
+ ld r31,264(4)
+ ld r30,136(4)
+ ld r29,8(4)
+ std r25,656(3)
+ std r24,528(3)
+ std r23,400(3)
+ std r10,272(3)
+ std r8,144(3)
+ std r6,16(3)
+ ld r22,656(4)
+ ld r21,528(4)
+ ld r20,400(4)
+ ld r11,272(4)
+ ld r9,144(4)
+ ld r7,16(4)
+ std r28,664(3)
+ std r27,536(3)
+ std r26,408(3)
+ std r31,280(3)
+ std r30,152(3)
+ stdu r29,24(3)
+ ld r25,664(4)
+ ld r24,536(4)
+ ld r23,408(4)
+ ld r10,280(4)
+ ld r8,152(4)
+ ldu r6,24(4)
+ bdnz 1b
+ std r22,648(3)
+ std r21,520(3)
+ std r20,392(3)
+ std r11,264(3)
+ std r9,136(3)
+ std r7,8(3)
+ addi r4,r4,640
+ addi r3,r3,648
+ bge 0b
+ mtctr r5
+ ld r7,0(4)
+ ld r8,8(4)
+ ldu r9,16(4)
+3: ld r10,8(4)
+ std r7,8(3)
+ ld r7,16(4)
+ std r8,16(3)
+ ld r8,24(4)
+ std r9,24(3)
+ ldu r9,32(4)
+ stdu r10,32(3)
+ bdnz 3b
+4: ld r10,8(4)
+ std r7,8(3)
+ std r8,16(3)
+ std r9,24(3)
+ std r10,32(3)
+9: ld r20,-96(1)
+ ld r21,-88(1)
+ ld r22,-80(1)
+ ld r23,-72(1)
+ ld r24,-64(1)
+ ld r25,-56(1)
+ ld r26,-48(1)
+ ld r27,-40(1)
+ ld r28,-32(1)
+ ld r29,-24(1)
+ ld r30,-16(1)
+ ld r31,-8(1)
+ blr
diff --git a/arch/powerpc/lib/copyuser.S b/arch/powerpc/lib/copyuser.S
new file mode 100644
index 000000000000..a0b3fbbd6fb1
--- /dev/null
+++ b/arch/powerpc/lib/copyuser.S
@@ -0,0 +1,576 @@
+/*
+ * arch/ppc64/lib/copyuser.S
+ *
+ * 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
+ beq .Lcopy_page
+ andi. r6,r6,7
+ mtcrf 0x01,r5
+ blt cr1,.Lshort_copy
+ bne .Ldst_unaligned
+.Ldst_aligned:
+ andi. r0,r4,7
+ addi r3,r3,-16
+ bne .Lsrc_unaligned
+ 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
+23: ld r9,8(r4)
+.Ldo_tail:
+ bf cr7*4+1,1f
+ rotldi r9,r9,32
+73: stw r9,0(r3)
+ addi r3,r3,4
+1: bf cr7*4+2,2f
+ rotldi r9,r9,16
+74: sth r9,0(r3)
+ addi r3,r3,2
+2: bf cr7*4+3,3f
+ rotldi r9,r9,8
+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
+ ble cr1,.Ldo_tail
+34: ld r0,8(r4)
+ srd r7,r0,r11
+ or r9,r7,r9
+ b .Ldo_tail
+
+.Ldst_unaligned:
+ mtcrf 0x01,r6 /* put #bytes to 8B bdry into cr7 */
+ subf r5,r6,r5
+ li r7,0
+ cmpldi r1,r5,16
+ 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
+3: mtcrf 0x01,r5
+ 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
+123:
+134:
+135:
+138:
+139:
+140:
+141:
+142:
+
+/*
+ * 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:
+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
+ .llong 74b,174b
+ .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
+ .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.
+ */
+.Lcopy_page:
+ 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
diff --git a/arch/powerpc/lib/div64.S b/arch/powerpc/lib/div64.S
new file mode 100644
index 000000000000..3527569e9926
--- /dev/null
+++ b/arch/powerpc/lib/div64.S
@@ -0,0 +1,58 @@
+/*
+ * Divide a 64-bit unsigned number by a 32-bit unsigned number.
+ * This routine assumes that the top 32 bits of the dividend are
+ * non-zero to start with.
+ * On entry, r3 points to the dividend, which get overwritten with
+ * the 64-bit quotient, and r4 contains the divisor.
+ * On exit, r3 contains the remainder.
+ *
+ * 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/ppc_asm.h>
+#include <asm/processor.h>
+
+_GLOBAL(__div64_32)
+ lwz r5,0(r3) # get the dividend into r5/r6
+ lwz r6,4(r3)
+ cmplw r5,r4
+ li r7,0
+ li r8,0
+ blt 1f
+ divwu r7,r5,r4 # if dividend.hi >= divisor,
+ mullw r0,r7,r4 # quotient.hi = dividend.hi / divisor
+ subf. r5,r0,r5 # dividend.hi %= divisor
+ beq 3f
+1: mr r11,r5 # here dividend.hi != 0
+ andis. r0,r5,0xc000
+ bne 2f
+ cntlzw r0,r5 # we are shifting the dividend right
+ li r10,-1 # to make it < 2^32, and shifting
+ srw r10,r10,r0 # the divisor right the same amount,
+ add r9,r4,r10 # rounding up (so the estimate cannot
+ andc r11,r6,r10 # ever be too large, only too small)
+ andc r9,r9,r10
+ or r11,r5,r11
+ rotlw r9,r9,r0
+ rotlw r11,r11,r0
+ divwu r11,r11,r9 # then we divide the shifted quantities
+2: mullw r10,r11,r4 # to get an estimate of the quotient,
+ mulhwu r9,r11,r4 # multiply the estimate by the divisor,
+ subfc r6,r10,r6 # take the product from the divisor,
+ add r8,r8,r11 # and add the estimate to the accumulated
+ subfe. r5,r9,r5 # quotient
+ bne 1b
+3: cmplw r6,r4
+ blt 4f
+ divwu r0,r6,r4 # perform the remaining 32-bit division
+ mullw r10,r0,r4 # and get the remainder
+ add r8,r8,r0
+ subf r6,r10,r6
+4: stw r7,0(r3) # return the quotient in *r3
+ stw r8,4(r3)
+ mr r3,r6 # return the remainder in r3
+ blr
diff --git a/arch/powerpc/lib/e2a.c b/arch/powerpc/lib/e2a.c
new file mode 100644
index 000000000000..d2b834887920
--- /dev/null
+++ b/arch/powerpc/lib/e2a.c
@@ -0,0 +1,108 @@
+/*
+ * arch/ppc64/lib/e2a.c
+ *
+ * EBCDIC to ASCII conversion
+ *
+ * This function moved here from arch/ppc64/kernel/viopath.c
+ *
+ * (C) Copyright 2000-2004 IBM Corporation
+ *
+ * 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) anyu later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+
+unsigned char e2a(unsigned char x)
+{
+ switch (x) {
+ case 0xF0:
+ return '0';
+ case 0xF1:
+ return '1';
+ case 0xF2:
+ return '2';
+ case 0xF3:
+ return '3';
+ case 0xF4:
+ return '4';
+ case 0xF5:
+ return '5';
+ case 0xF6:
+ return '6';
+ case 0xF7:
+ return '7';
+ case 0xF8:
+ return '8';
+ case 0xF9:
+ return '9';
+ case 0xC1:
+ return 'A';
+ case 0xC2:
+ return 'B';
+ case 0xC3:
+ return 'C';
+ case 0xC4:
+ return 'D';
+ case 0xC5:
+ return 'E';
+ case 0xC6:
+ return 'F';
+ case 0xC7:
+ return 'G';
+ case 0xC8:
+ return 'H';
+ case 0xC9:
+ return 'I';
+ case 0xD1:
+ return 'J';
+ case 0xD2:
+ return 'K';
+ case 0xD3:
+ return 'L';
+ case 0xD4:
+ return 'M';
+ case 0xD5:
+ return 'N';
+ case 0xD6:
+ return 'O';
+ case 0xD7:
+ return 'P';
+ case 0xD8:
+ return 'Q';
+ case 0xD9:
+ return 'R';
+ case 0xE2:
+ return 'S';
+ case 0xE3:
+ return 'T';
+ case 0xE4:
+ return 'U';
+ case 0xE5:
+ return 'V';
+ case 0xE6:
+ return 'W';
+ case 0xE7:
+ return 'X';
+ case 0xE8:
+ return 'Y';
+ case 0xE9:
+ return 'Z';
+ }
+ return ' ';
+}
+EXPORT_SYMBOL(e2a);
+
+
diff --git a/arch/powerpc/lib/memcpy.S b/arch/powerpc/lib/memcpy.S
new file mode 100644
index 000000000000..9ccacdf5bcb9
--- /dev/null
+++ b/arch/powerpc/lib/memcpy.S
@@ -0,0 +1,172 @@
+/*
+ * arch/ppc64/lib/memcpy.S
+ *
+ * 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(memcpy)
+ mtcrf 0x01,r5
+ cmpldi cr1,r5,16
+ neg r6,r3 # LS 3 bits = # bytes to 8-byte dest bdry
+ andi. r6,r6,7
+ dcbt 0,r4
+ blt cr1,.Lshort_copy
+ bne .Ldst_unaligned
+.Ldst_aligned:
+ andi. r0,r4,7
+ addi r3,r3,-16
+ bne .Lsrc_unaligned
+ srdi r7,r5,4
+ ld r9,0(r4)
+ addi r4,r4,-8
+ mtctr r7
+ andi. r5,r5,7
+ bf cr7*4+0,2f
+ addi r3,r3,8
+ addi r4,r4,8
+ mr r8,r9
+ blt cr1,3f
+1: ld r9,8(r4)
+ std r8,8(r3)
+2: ldu r8,16(r4)
+ stdu r9,16(r3)
+ bdnz 1b
+3: std r8,8(r3)
+ beqlr
+ addi r3,r3,16
+ ld r9,8(r4)
+.Ldo_tail:
+ bf cr7*4+1,1f
+ rotldi r9,r9,32
+ stw r9,0(r3)
+ addi r3,r3,4
+1: bf cr7*4+2,2f
+ rotldi r9,r9,16
+ sth r9,0(r3)
+ addi r3,r3,2
+2: bf cr7*4+3,3f
+ rotldi r9,r9,8
+ stb r9,0(r3)
+3: blr
+
+.Lsrc_unaligned:
+ srdi r6,r5,3
+ addi r5,r5,-16
+ subf r4,r0,r4
+ srdi r7,r5,4
+ sldi r10,r0,3
+ cmpdi cr6,r6,3
+ andi. r5,r5,7
+ mtctr r7
+ subfic r11,r10,64
+ add r5,r5,r0
+
+ bt cr7*4+0,0f
+
+ ld r9,0(r4) # 3+2n loads, 2+2n stores
+ ld r0,8(r4)
+ sld r6,r9,r10
+ ldu r9,16(r4)
+ srd r7,r0,r11
+ sld r8,r0,r10
+ or r7,r7,r6
+ blt cr6,4f
+ ld r0,8(r4)
+ # s1<< in r8, d0=(s0<<|s1>>) in r7, s3 in r0, s2 in r9, nix in r6 & r12
+ b 2f
+
+0: ld r0,0(r4) # 4+2n loads, 3+2n stores
+ ldu r9,8(r4)
+ sld r8,r0,r10
+ addi r3,r3,-8
+ blt cr6,5f
+ ld r0,8(r4)
+ srd r12,r9,r11
+ sld r6,r9,r10
+ ldu r9,16(r4)
+ or r12,r8,r12
+ srd r7,r0,r11
+ sld r8,r0,r10
+ addi r3,r3,16
+ beq cr6,3f
+
+ # d0=(s0<<|s1>>) in r12, s1<< in r6, s2>> in r7, s2<< in r8, s3 in r9
+1: or r7,r7,r6
+ ld r0,8(r4)
+ std r12,8(r3)
+2: srd r12,r9,r11
+ sld r6,r9,r10
+ ldu r9,16(r4)
+ or r12,r8,r12
+ stdu r7,16(r3)
+ srd r7,r0,r11
+ sld r8,r0,r10
+ bdnz 1b
+
+3: std r12,8(r3)
+ or r7,r7,r6
+4: std r7,16(r3)
+5: srd r12,r9,r11
+ or r12,r8,r12
+ std r12,24(r3)
+ beqlr
+ cmpwi cr1,r5,8
+ addi r3,r3,32
+ sld r9,r9,r10
+ ble cr1,.Ldo_tail
+ ld r0,8(r4)
+ srd r7,r0,r11
+ or r9,r7,r9
+ b .Ldo_tail
+
+.Ldst_unaligned:
+ mtcrf 0x01,r6 # put #bytes to 8B bdry into cr7
+ subf r5,r6,r5
+ li r7,0
+ cmpldi r1,r5,16
+ bf cr7*4+3,1f
+ lbz r0,0(r4)
+ stb r0,0(r3)
+ addi r7,r7,1
+1: bf cr7*4+2,2f
+ lhzx r0,r7,r4
+ sthx r0,r7,r3
+ addi r7,r7,2
+2: bf cr7*4+1,3f
+ lwzx r0,r7,r4
+ stwx r0,r7,r3
+3: mtcrf 0x01,r5
+ add r4,r6,r4
+ add r3,r6,r3
+ b .Ldst_aligned
+
+.Lshort_copy:
+ bf cr7*4+0,1f
+ lwz r0,0(r4)
+ lwz r9,4(r4)
+ addi r4,r4,8
+ stw r0,0(r3)
+ stw r9,4(r3)
+ addi r3,r3,8
+1: bf cr7*4+1,2f
+ lwz r0,0(r4)
+ addi r4,r4,4
+ stw r0,0(r3)
+ addi r3,r3,4
+2: bf cr7*4+2,3f
+ lhz r0,0(r4)
+ addi r4,r4,2
+ sth r0,0(r3)
+ addi r3,r3,2
+3: bf cr7*4+3,4f
+ lbz r0,0(r4)
+ stb r0,0(r3)
+4: blr
diff --git a/arch/powerpc/lib/rheap.c b/arch/powerpc/lib/rheap.c
new file mode 100644
index 000000000000..42c5de2c898f
--- /dev/null
+++ b/arch/powerpc/lib/rheap.c
@@ -0,0 +1,693 @@
+/*
+ * arch/ppc/syslib/rheap.c
+ *
+ * A Remote Heap. Remote means that we don't touch the memory that the
+ * heap points to. Normal heap implementations use the memory they manage
+ * to place their list. We cannot do that because the memory we manage may
+ * have special properties, for example it is uncachable or of different
+ * endianess.
+ *
+ * Author: Pantelis Antoniou <panto@intracom.gr>
+ *
+ * 2004 (c) INTRACOM S.A. Greece. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+
+#include <asm/rheap.h>
+
+/*
+ * Fixup a list_head, needed when copying lists. If the pointers fall
+ * between s and e, apply the delta. This assumes that
+ * sizeof(struct list_head *) == sizeof(unsigned long *).
+ */
+static inline void fixup(unsigned long s, unsigned long e, int d,
+ struct list_head *l)
+{
+ unsigned long *pp;
+
+ pp = (unsigned long *)&l->next;
+ if (*pp >= s && *pp < e)
+ *pp += d;
+
+ pp = (unsigned long *)&l->prev;
+ if (*pp >= s && *pp < e)
+ *pp += d;
+}
+
+/* Grow the allocated blocks */
+static int grow(rh_info_t * info, int max_blocks)
+{
+ rh_block_t *block, *blk;
+ int i, new_blocks;
+ int delta;
+ unsigned long blks, blke;
+
+ if (max_blocks <= info->max_blocks)
+ return -EINVAL;
+
+ new_blocks = max_blocks - info->max_blocks;
+
+ block = kmalloc(sizeof(rh_block_t) * max_blocks, GFP_KERNEL);
+ if (block == NULL)
+ return -ENOMEM;
+
+ if (info->max_blocks > 0) {
+
+ /* copy old block area */
+ memcpy(block, info->block,
+ sizeof(rh_block_t) * info->max_blocks);
+
+ delta = (char *)block - (char *)info->block;
+
+ /* and fixup list pointers */
+ blks = (unsigned long)info->block;
+ blke = (unsigned long)(info->block + info->max_blocks);
+
+ for (i = 0, blk = block; i < info->max_blocks; i++, blk++)
+ fixup(blks, blke, delta, &blk->list);
+
+ fixup(blks, blke, delta, &info->empty_list);
+ fixup(blks, blke, delta, &info->free_list);
+ fixup(blks, blke, delta, &info->taken_list);
+
+ /* free the old allocated memory */
+ if ((info->flags & RHIF_STATIC_BLOCK) == 0)
+ kfree(info->block);
+ }
+
+ info->block = block;
+ info->empty_slots += new_blocks;
+ info->max_blocks = max_blocks;
+ info->flags &= ~RHIF_STATIC_BLOCK;
+
+ /* add all new blocks to the free list */
+ for (i = 0, blk = block + info->max_blocks; i < new_blocks; i++, blk++)
+ list_add(&blk->list, &info->empty_list);
+
+ return 0;
+}
+
+/*
+ * Assure at least the required amount of empty slots. If this function
+ * causes a grow in the block area then all pointers kept to the block
+ * area are invalid!
+ */
+static int assure_empty(rh_info_t * info, int slots)
+{
+ int max_blocks;
+
+ /* This function is not meant to be used to grow uncontrollably */
+ if (slots >= 4)
+ return -EINVAL;
+
+ /* Enough space */
+ if (info->empty_slots >= slots)
+ return 0;
+
+ /* Next 16 sized block */
+ max_blocks = ((info->max_blocks + slots) + 15) & ~15;
+
+ return grow(info, max_blocks);
+}
+
+static rh_block_t *get_slot(rh_info_t * info)
+{
+ rh_block_t *blk;
+
+ /* If no more free slots, and failure to extend. */
+ /* XXX: You should have called assure_empty before */
+ if (info->empty_slots == 0) {
+ printk(KERN_ERR "rh: out of slots; crash is imminent.\n");
+ return NULL;
+ }
+
+ /* Get empty slot to use */
+ blk = list_entry(info->empty_list.next, rh_block_t, list);
+ list_del_init(&blk->list);
+ info->empty_slots--;
+
+ /* Initialize */
+ blk->start = NULL;
+ blk->size = 0;
+ blk->owner = NULL;
+
+ return blk;
+}
+
+static inline void release_slot(rh_info_t * info, rh_block_t * blk)
+{
+ list_add(&blk->list, &info->empty_list);
+ info->empty_slots++;
+}
+
+static void attach_free_block(rh_info_t * info, rh_block_t * blkn)
+{
+ rh_block_t *blk;
+ rh_block_t *before;
+ rh_block_t *after;
+ rh_block_t *next;
+ int size;
+ unsigned long s, e, bs, be;
+ struct list_head *l;
+
+ /* We assume that they are aligned properly */
+ size = blkn->size;
+ s = (unsigned long)blkn->start;
+ e = s + size;
+
+ /* Find the blocks immediately before and after the given one
+ * (if any) */
+ before = NULL;
+ after = NULL;
+ next = NULL;
+
+ list_for_each(l, &info->free_list) {
+ blk = list_entry(l, rh_block_t, list);
+
+ bs = (unsigned long)blk->start;
+ be = bs + blk->size;
+
+ if (next == NULL && s >= bs)
+ next = blk;
+
+ if (be == s)
+ before = blk;
+
+ if (e == bs)
+ after = blk;
+
+ /* If both are not null, break now */
+ if (before != NULL && after != NULL)
+ break;
+ }
+
+ /* Now check if they are really adjacent */
+ if (before != NULL && s != (unsigned long)before->start + before->size)
+ before = NULL;
+
+ if (after != NULL && e != (unsigned long)after->start)
+ after = NULL;
+
+ /* No coalescing; list insert and return */
+ if (before == NULL && after == NULL) {
+
+ if (next != NULL)
+ list_add(&blkn->list, &next->list);
+ else
+ list_add(&blkn->list, &info->free_list);
+
+ return;
+ }
+
+ /* We don't need it anymore */
+ release_slot(info, blkn);
+
+ /* Grow the before block */
+ if (before != NULL && after == NULL) {
+ before->size += size;
+ return;
+ }
+
+ /* Grow the after block backwards */
+ if (before == NULL && after != NULL) {
+ after->start = (int8_t *)after->start - size;
+ after->size += size;
+ return;
+ }
+
+ /* Grow the before block, and release the after block */
+ before->size += size + after->size;
+ list_del(&after->list);
+ release_slot(info, after);
+}
+
+static void attach_taken_block(rh_info_t * info, rh_block_t * blkn)
+{
+ rh_block_t *blk;
+ struct list_head *l;
+
+ /* Find the block immediately before the given one (if any) */
+ list_for_each(l, &info->taken_list) {
+ blk = list_entry(l, rh_block_t, list);
+ if (blk->start > blkn->start) {
+ list_add_tail(&blkn->list, &blk->list);
+ return;
+ }
+ }
+
+ list_add_tail(&blkn->list, &info->taken_list);
+}
+
+/*
+ * Create a remote heap dynamically. Note that no memory for the blocks
+ * are allocated. It will upon the first allocation
+ */
+rh_info_t *rh_create(unsigned int alignment)
+{
+ rh_info_t *info;
+
+ /* Alignment must be a power of two */
+ if ((alignment & (alignment - 1)) != 0)
+ return ERR_PTR(-EINVAL);
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (info == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ info->alignment = alignment;
+
+ /* Initially everything as empty */
+ info->block = NULL;
+ info->max_blocks = 0;
+ info->empty_slots = 0;
+ info->flags = 0;
+
+ INIT_LIST_HEAD(&info->empty_list);
+ INIT_LIST_HEAD(&info->free_list);
+ INIT_LIST_HEAD(&info->taken_list);
+
+ return info;
+}
+
+/*
+ * Destroy a dynamically created remote heap. Deallocate only if the areas
+ * are not static
+ */
+void rh_destroy(rh_info_t * info)
+{
+ if ((info->flags & RHIF_STATIC_BLOCK) == 0 && info->block != NULL)
+ kfree(info->block);
+
+ if ((info->flags & RHIF_STATIC_INFO) == 0)
+ kfree(info);
+}
+
+/*
+ * Initialize in place a remote heap info block. This is needed to support
+ * operation very early in the startup of the kernel, when it is not yet safe
+ * to call kmalloc.
+ */
+void rh_init(rh_info_t * info, unsigned int alignment, int max_blocks,
+ rh_block_t * block)
+{
+ int i;
+ rh_block_t *blk;
+
+ /* Alignment must be a power of two */
+ if ((alignment & (alignment - 1)) != 0)
+ return;
+
+ info->alignment = alignment;
+
+ /* Initially everything as empty */
+ info->block = block;
+ info->max_blocks = max_blocks;
+ info->empty_slots = max_blocks;
+ info->flags = RHIF_STATIC_INFO | RHIF_STATIC_BLOCK;
+
+ INIT_LIST_HEAD(&info->empty_list);
+ INIT_LIST_HEAD(&info->free_list);
+ INIT_LIST_HEAD(&info->taken_list);
+
+ /* Add all new blocks to the free list */
+ for (i = 0, blk = block; i < max_blocks; i++, blk++)
+ list_add(&blk->list, &info->empty_list);
+}
+
+/* Attach a free memory region, coalesces regions if adjuscent */
+int rh_attach_region(rh_info_t * info, void *start, int size)
+{
+ rh_block_t *blk;
+ unsigned long s, e, m;
+ int r;
+
+ /* The region must be aligned */
+ s = (unsigned long)start;
+ e = s + size;
+ m = info->alignment - 1;
+
+ /* Round start up */
+ s = (s + m) & ~m;
+
+ /* Round end down */
+ e = e & ~m;
+
+ /* Take final values */
+ start = (void *)s;
+ size = (int)(e - s);
+
+ /* Grow the blocks, if needed */
+ r = assure_empty(info, 1);
+ if (r < 0)
+ return r;
+
+ blk = get_slot(info);
+ blk->start = start;
+ blk->size = size;
+ blk->owner = NULL;
+
+ attach_free_block(info, blk);
+
+ return 0;
+}
+
+/* Detatch given address range, splits free block if needed. */
+void *rh_detach_region(rh_info_t * info, void *start, int size)
+{
+ struct list_head *l;
+ rh_block_t *blk, *newblk;
+ unsigned long s, e, m, bs, be;
+
+ /* Validate size */
+ if (size <= 0)
+ return ERR_PTR(-EINVAL);
+
+ /* The region must be aligned */
+ s = (unsigned long)start;
+ e = s + size;
+ m = info->alignment - 1;
+
+ /* Round start up */
+ s = (s + m) & ~m;
+
+ /* Round end down */
+ e = e & ~m;
+
+ if (assure_empty(info, 1) < 0)
+ return ERR_PTR(-ENOMEM);
+
+ blk = NULL;
+ list_for_each(l, &info->free_list) {
+ blk = list_entry(l, rh_block_t, list);
+ /* The range must lie entirely inside one free block */
+ bs = (unsigned long)blk->start;
+ be = (unsigned long)blk->start + blk->size;
+ if (s >= bs && e <= be)
+ break;
+ blk = NULL;
+ }
+
+ if (blk == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ /* Perfect fit */
+ if (bs == s && be == e) {
+ /* Delete from free list, release slot */
+ list_del(&blk->list);
+ release_slot(info, blk);
+ return (void *)s;
+ }
+
+ /* blk still in free list, with updated start and/or size */
+ if (bs == s || be == e) {
+ if (bs == s)
+ blk->start = (int8_t *)blk->start + size;
+ blk->size -= size;
+
+ } else {
+ /* The front free fragment */
+ blk->size = s - bs;
+
+ /* the back free fragment */
+ newblk = get_slot(info);
+ newblk->start = (void *)e;
+ newblk->size = be - e;
+
+ list_add(&newblk->list, &blk->list);
+ }
+
+ return (void *)s;
+}
+
+void *rh_alloc(rh_info_t * info, int size, const char *owner)
+{
+ struct list_head *l;
+ rh_block_t *blk;
+ rh_block_t *newblk;
+ void *start;
+
+ /* Validate size */
+ if (size <= 0)
+ return ERR_PTR(-EINVAL);
+
+ /* Align to configured alignment */
+ size = (size + (info->alignment - 1)) & ~(info->alignment - 1);
+
+ if (assure_empty(info, 1) < 0)
+ return ERR_PTR(-ENOMEM);
+
+ blk = NULL;
+ list_for_each(l, &info->free_list) {
+ blk = list_entry(l, rh_block_t, list);
+ if (size <= blk->size)
+ break;
+ blk = NULL;
+ }
+
+ if (blk == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ /* Just fits */
+ if (blk->size == size) {
+ /* Move from free list to taken list */
+ list_del(&blk->list);
+ blk->owner = owner;
+ start = blk->start;
+
+ attach_taken_block(info, blk);
+
+ return start;
+ }
+
+ newblk = get_slot(info);
+ newblk->start = blk->start;
+ newblk->size = size;
+ newblk->owner = owner;
+
+ /* blk still in free list, with updated start, size */
+ blk->start = (int8_t *)blk->start + size;
+ blk->size -= size;
+
+ start = newblk->start;
+
+ attach_taken_block(info, newblk);
+
+ return start;
+}
+
+/* allocate at precisely the given address */
+void *rh_alloc_fixed(rh_info_t * info, void *start, int size, const char *owner)
+{
+ struct list_head *l;
+ rh_block_t *blk, *newblk1, *newblk2;
+ unsigned long s, e, m, bs, be;
+
+ /* Validate size */
+ if (size <= 0)
+ return ERR_PTR(-EINVAL);
+
+ /* The region must be aligned */
+ s = (unsigned long)start;
+ e = s + size;
+ m = info->alignment - 1;
+
+ /* Round start up */
+ s = (s + m) & ~m;
+
+ /* Round end down */
+ e = e & ~m;
+
+ if (assure_empty(info, 2) < 0)
+ return ERR_PTR(-ENOMEM);
+
+ blk = NULL;
+ list_for_each(l, &info->free_list) {
+ blk = list_entry(l, rh_block_t, list);
+ /* The range must lie entirely inside one free block */
+ bs = (unsigned long)blk->start;
+ be = (unsigned long)blk->start + blk->size;
+ if (s >= bs && e <= be)
+ break;
+ }
+
+ if (blk == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ /* Perfect fit */
+ if (bs == s && be == e) {
+ /* Move from free list to taken list */
+ list_del(&blk->list);
+ blk->owner = owner;
+
+ start = blk->start;
+ attach_taken_block(info, blk);
+
+ return start;
+
+ }
+
+ /* blk still in free list, with updated start and/or size */
+ if (bs == s || be == e) {
+ if (bs == s)
+ blk->start = (int8_t *)blk->start + size;
+ blk->size -= size;
+
+ } else {
+ /* The front free fragment */
+ blk->size = s - bs;
+
+ /* The back free fragment */
+ newblk2 = get_slot(info);
+ newblk2->start = (void *)e;
+ newblk2->size = be - e;
+
+ list_add(&newblk2->list, &blk->list);
+ }
+
+ newblk1 = get_slot(info);
+ newblk1->start = (void *)s;
+ newblk1->size = e - s;
+ newblk1->owner = owner;
+
+ start = newblk1->start;
+ attach_taken_block(info, newblk1);
+
+ return start;
+}
+
+int rh_free(rh_info_t * info, void *start)
+{
+ rh_block_t *blk, *blk2;
+ struct list_head *l;
+ int size;
+
+ /* Linear search for block */
+ blk = NULL;
+ list_for_each(l, &info->taken_list) {
+ blk2 = list_entry(l, rh_block_t, list);
+ if (start < blk2->start)
+ break;
+ blk = blk2;
+ }
+
+ if (blk == NULL || start > (blk->start + blk->size))
+ return -EINVAL;
+
+ /* Remove from taken list */
+ list_del(&blk->list);
+
+ /* Get size of freed block */
+ size = blk->size;
+ attach_free_block(info, blk);
+
+ return size;
+}
+
+int rh_get_stats(rh_info_t * info, int what, int max_stats, rh_stats_t * stats)
+{
+ rh_block_t *blk;
+ struct list_head *l;
+ struct list_head *h;
+ int nr;
+
+ switch (what) {
+
+ case RHGS_FREE:
+ h = &info->free_list;
+ break;
+
+ case RHGS_TAKEN:
+ h = &info->taken_list;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ /* Linear search for block */
+ nr = 0;
+ list_for_each(l, h) {
+ blk = list_entry(l, rh_block_t, list);
+ if (stats != NULL && nr < max_stats) {
+ stats->start = blk->start;
+ stats->size = blk->size;
+ stats->owner = blk->owner;
+ stats++;
+ }
+ nr++;
+ }
+
+ return nr;
+}
+
+int rh_set_owner(rh_info_t * info, void *start, const char *owner)
+{
+ rh_block_t *blk, *blk2;
+ struct list_head *l;
+ int size;
+
+ /* Linear search for block */
+ blk = NULL;
+ list_for_each(l, &info->taken_list) {
+ blk2 = list_entry(l, rh_block_t, list);
+ if (start < blk2->start)
+ break;
+ blk = blk2;
+ }
+
+ if (blk == NULL || start > (blk->start + blk->size))
+ return -EINVAL;
+
+ blk->owner = owner;
+ size = blk->size;
+
+ return size;
+}
+
+void rh_dump(rh_info_t * info)
+{
+ static rh_stats_t st[32]; /* XXX maximum 32 blocks */
+ int maxnr;
+ int i, nr;
+
+ maxnr = sizeof(st) / sizeof(st[0]);
+
+ printk(KERN_INFO
+ "info @0x%p (%d slots empty / %d max)\n",
+ info, info->empty_slots, info->max_blocks);
+
+ printk(KERN_INFO " Free:\n");
+ nr = rh_get_stats(info, RHGS_FREE, maxnr, st);
+ if (nr > maxnr)
+ nr = maxnr;
+ for (i = 0; i < nr; i++)
+ printk(KERN_INFO
+ " 0x%p-0x%p (%u)\n",
+ st[i].start, (int8_t *) st[i].start + st[i].size,
+ st[i].size);
+ printk(KERN_INFO "\n");
+
+ printk(KERN_INFO " Taken:\n");
+ nr = rh_get_stats(info, RHGS_TAKEN, maxnr, st);
+ if (nr > maxnr)
+ nr = maxnr;
+ for (i = 0; i < nr; i++)
+ printk(KERN_INFO
+ " 0x%p-0x%p (%u) %s\n",
+ st[i].start, (int8_t *) st[i].start + st[i].size,
+ st[i].size, st[i].owner != NULL ? st[i].owner : "");
+ printk(KERN_INFO "\n");
+}
+
+void rh_dump_blk(rh_info_t * info, rh_block_t * blk)
+{
+ printk(KERN_INFO
+ "blk @0x%p: 0x%p-0x%p (%u)\n",
+ blk, blk->start, (int8_t *) blk->start + blk->size, blk->size);
+}
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
new file mode 100644
index 000000000000..e79123d1485c
--- /dev/null
+++ b/arch/powerpc/lib/sstep.c
@@ -0,0 +1,141 @@
+/*
+ * Single-step support.
+ *
+ * Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM
+ *
+ * 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 <linux/kernel.h>
+#include <linux/ptrace.h>
+#include <asm/sstep.h>
+#include <asm/processor.h>
+
+extern char system_call_common[];
+
+/* Bits in SRR1 that are copied from MSR */
+#define MSR_MASK 0xffffffff87c0ffff
+
+/*
+ * Determine whether a conditional branch instruction would branch.
+ */
+static int branch_taken(unsigned int instr, struct pt_regs *regs)
+{
+ unsigned int bo = (instr >> 21) & 0x1f;
+ unsigned int bi;
+
+ if ((bo & 4) == 0) {
+ /* decrement counter */
+ --regs->ctr;
+ if (((bo >> 1) & 1) ^ (regs->ctr == 0))
+ return 0;
+ }
+ if ((bo & 0x10) == 0) {
+ /* check bit from CR */
+ bi = (instr >> 16) & 0x1f;
+ if (((regs->ccr >> (31 - bi)) & 1) != ((bo >> 3) & 1))
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Emulate instructions that cause a transfer of control.
+ * Returns 1 if the step was emulated, 0 if not,
+ * or -1 if the instruction is one that should not be stepped,
+ * such as an rfid, or a mtmsrd that would clear MSR_RI.
+ */
+int emulate_step(struct pt_regs *regs, unsigned int instr)
+{
+ unsigned int opcode, rd;
+ unsigned long int imm;
+
+ opcode = instr >> 26;
+ switch (opcode) {
+ case 16: /* bc */
+ imm = (signed short)(instr & 0xfffc);
+ if ((instr & 2) == 0)
+ imm += regs->nip;
+ regs->nip += 4;
+ if ((regs->msr & MSR_SF) == 0)
+ regs->nip &= 0xffffffffUL;
+ if (instr & 1)
+ regs->link = regs->nip;
+ if (branch_taken(instr, regs))
+ regs->nip = imm;
+ return 1;
+ case 17: /* sc */
+ /*
+ * N.B. this uses knowledge about how the syscall
+ * entry code works. If that is changed, this will
+ * need to be changed also.
+ */
+ regs->gpr[9] = regs->gpr[13];
+ regs->gpr[11] = regs->nip + 4;
+ regs->gpr[12] = regs->msr & MSR_MASK;
+ regs->gpr[13] = (unsigned long) get_paca();
+ regs->nip = (unsigned long) &system_call_common;
+ regs->msr = MSR_KERNEL;
+ return 1;
+ case 18: /* b */
+ imm = instr & 0x03fffffc;
+ if (imm & 0x02000000)
+ imm -= 0x04000000;
+ if ((instr & 2) == 0)
+ imm += regs->nip;
+ if (instr & 1) {
+ regs->link = regs->nip + 4;
+ if ((regs->msr & MSR_SF) == 0)
+ regs->link &= 0xffffffffUL;
+ }
+ if ((regs->msr & MSR_SF) == 0)
+ imm &= 0xffffffffUL;
+ regs->nip = imm;
+ return 1;
+ case 19:
+ switch (instr & 0x7fe) {
+ case 0x20: /* bclr */
+ case 0x420: /* bcctr */
+ imm = (instr & 0x400)? regs->ctr: regs->link;
+ regs->nip += 4;
+ if ((regs->msr & MSR_SF) == 0) {
+ regs->nip &= 0xffffffffUL;
+ imm &= 0xffffffffUL;
+ }
+ if (instr & 1)
+ regs->link = regs->nip;
+ if (branch_taken(instr, regs))
+ regs->nip = imm;
+ return 1;
+ case 0x24: /* rfid, scary */
+ return -1;
+ }
+ case 31:
+ rd = (instr >> 21) & 0x1f;
+ switch (instr & 0x7fe) {
+ case 0xa6: /* mfmsr */
+ regs->gpr[rd] = regs->msr & MSR_MASK;
+ regs->nip += 4;
+ if ((regs->msr & MSR_SF) == 0)
+ regs->nip &= 0xffffffffUL;
+ return 1;
+ case 0x164: /* mtmsrd */
+ /* only MSR_EE and MSR_RI get changed if bit 15 set */
+ /* mtmsrd doesn't change MSR_HV and MSR_ME */
+ imm = (instr & 0x10000)? 0x8002: 0xefffffffffffefffUL;
+ imm = (regs->msr & MSR_MASK & ~imm)
+ | (regs->gpr[rd] & imm);
+ if ((imm & MSR_RI) == 0)
+ /* can't step mtmsrd that would clear MSR_RI */
+ return -1;
+ regs->msr = imm;
+ regs->nip += 4;
+ if ((imm & MSR_SF) == 0)
+ regs->nip &= 0xffffffffUL;
+ return 1;
+ }
+ }
+ return 0;
+}
diff --git a/arch/powerpc/lib/strcase.c b/arch/powerpc/lib/strcase.c
new file mode 100644
index 000000000000..36b521091bbc
--- /dev/null
+++ b/arch/powerpc/lib/strcase.c
@@ -0,0 +1,23 @@
+#include <linux/ctype.h>
+
+int strcasecmp(const char *s1, const char *s2)
+{
+ int c1, c2;
+
+ do {
+ c1 = tolower(*s1++);
+ c2 = tolower(*s2++);
+ } while (c1 == c2 && c1 != 0);
+ return c1 - c2;
+}
+
+int strncasecmp(const char *s1, const char *s2, int n)
+{
+ int c1, c2;
+
+ do {
+ c1 = tolower(*s1++);
+ c2 = tolower(*s2++);
+ } while ((--n > 0) && c1 == c2 && c1 != 0);
+ return c1 - c2;
+}
diff --git a/arch/powerpc/lib/string.S b/arch/powerpc/lib/string.S
new file mode 100644
index 000000000000..15d40e9ef8b1
--- /dev/null
+++ b/arch/powerpc/lib/string.S
@@ -0,0 +1,203 @@
+/*
+ * String handling functions for PowerPC.
+ *
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ * 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 <linux/config.h>
+#include <asm/processor.h>
+#include <asm/errno.h>
+#include <asm/ppc_asm.h>
+
+ .text
+ .stabs "arch/powerpc/lib/",N_SO,0,0,0f
+ .stabs "string.S",N_SO,0,0,0f
+0:
+
+ .section __ex_table,"a"
+#ifdef CONFIG_PPC64
+ .align 3
+#define EXTBL .llong
+#else
+ .align 2
+#define EXTBL .long
+#endif
+ .text
+
+_GLOBAL(strcpy)
+ addi r5,r3,-1
+ addi r4,r4,-1
+1: lbzu r0,1(r4)
+ cmpwi 0,r0,0
+ stbu r0,1(r5)
+ bne 1b
+ blr
+
+/* This clears out any unused part of the destination buffer,
+ just as the libc version does. -- paulus */
+_GLOBAL(strncpy)
+ cmpwi 0,r5,0
+ beqlr
+ mtctr r5
+ addi r6,r3,-1
+ addi r4,r4,-1
+1: lbzu r0,1(r4)
+ cmpwi 0,r0,0
+ stbu r0,1(r6)
+ bdnzf 2,1b /* dec ctr, branch if ctr != 0 && !cr0.eq */
+ bnelr /* if we didn't hit a null char, we're done */
+ mfctr r5
+ cmpwi 0,r5,0 /* any space left in destination buffer? */
+ beqlr /* we know r0 == 0 here */
+2: stbu r0,1(r6) /* clear it out if so */
+ bdnz 2b
+ blr
+
+_GLOBAL(strcat)
+ addi r5,r3,-1
+ addi r4,r4,-1
+1: lbzu r0,1(r5)
+ cmpwi 0,r0,0
+ bne 1b
+ addi r5,r5,-1
+1: lbzu r0,1(r4)
+ cmpwi 0,r0,0
+ stbu r0,1(r5)
+ bne 1b
+ blr
+
+_GLOBAL(strcmp)
+ addi r5,r3,-1
+ addi r4,r4,-1
+1: lbzu r3,1(r5)
+ cmpwi 1,r3,0
+ lbzu r0,1(r4)
+ subf. r3,r0,r3
+ beqlr 1
+ beq 1b
+ blr
+
+_GLOBAL(strlen)
+ addi r4,r3,-1
+1: lbzu r0,1(r4)
+ cmpwi 0,r0,0
+ bne 1b
+ subf r3,r3,r4
+ blr
+
+_GLOBAL(memcmp)
+ cmpwi 0,r5,0
+ ble- 2f
+ mtctr r5
+ addi r6,r3,-1
+ addi r4,r4,-1
+1: lbzu r3,1(r6)
+ lbzu r0,1(r4)
+ subf. r3,r0,r3
+ bdnzt 2,1b
+ blr
+2: li r3,0
+ blr
+
+_GLOBAL(memchr)
+ cmpwi 0,r5,0
+ ble- 2f
+ mtctr r5
+ addi r3,r3,-1
+1: lbzu r0,1(r3)
+ cmpw 0,r0,r4
+ bdnzf 2,1b
+ beqlr
+2: li r3,0
+ blr
+
+_GLOBAL(__clear_user)
+ addi r6,r3,-4
+ li r3,0
+ li r5,0
+ cmplwi 0,r4,4
+ blt 7f
+ /* clear a single word */
+11: stwu r5,4(r6)
+ beqlr
+ /* clear word sized chunks */
+ andi. r0,r6,3
+ add r4,r0,r4
+ subf r6,r0,r6
+ srwi r0,r4,2
+ andi. r4,r4,3
+ mtctr r0
+ bdz 7f
+1: stwu r5,4(r6)
+ bdnz 1b
+ /* clear byte sized chunks */
+7: cmpwi 0,r4,0
+ beqlr
+ mtctr r4
+ addi r6,r6,3
+8: stbu r5,1(r6)
+ bdnz 8b
+ blr
+90: mr r3,r4
+ blr
+91: mfctr r3
+ slwi r3,r3,2
+ add r3,r3,r4
+ blr
+92: mfctr r3
+ blr
+
+ .section __ex_table,"a"
+ EXTBL 11b,90b
+ EXTBL 1b,91b
+ EXTBL 8b,92b
+ .text
+
+_GLOBAL(__strncpy_from_user)
+ addi r6,r3,-1
+ addi r4,r4,-1
+ cmpwi 0,r5,0
+ beq 2f
+ mtctr r5
+1: lbzu r0,1(r4)
+ cmpwi 0,r0,0
+ stbu r0,1(r6)
+ bdnzf 2,1b /* dec ctr, branch if ctr != 0 && !cr0.eq */
+ beq 3f
+2: addi r6,r6,1
+3: subf r3,r3,r6
+ blr
+99: li r3,-EFAULT
+ blr
+
+ .section __ex_table,"a"
+ EXTBL 1b,99b
+ .text
+
+/* r3 = str, r4 = len (> 0), r5 = top (highest addr) */
+_GLOBAL(__strnlen_user)
+ addi r7,r3,-1
+ subf r6,r7,r5 /* top+1 - str */
+ cmplw 0,r4,r6
+ bge 0f
+ mr r6,r4
+0: mtctr r6 /* ctr = min(len, top - str) */
+1: lbzu r0,1(r7) /* get next byte */
+ cmpwi 0,r0,0
+ bdnzf 2,1b /* loop if --ctr != 0 && byte != 0 */
+ addi r7,r7,1
+ subf r3,r3,r7 /* number of bytes we have looked at */
+ beqlr /* return if we found a 0 byte */
+ cmpw 0,r3,r4 /* did we look at all len bytes? */
+ blt 99f /* if not, must have hit top */
+ addi r3,r4,1 /* return len + 1 to indicate no null found */
+ blr
+99: li r3,0 /* bad address, return 0 */
+ blr
+
+ .section __ex_table,"a"
+ EXTBL 1b,99b
diff --git a/arch/powerpc/lib/usercopy.c b/arch/powerpc/lib/usercopy.c
new file mode 100644
index 000000000000..5eea6f3c1e03
--- /dev/null
+++ b/arch/powerpc/lib/usercopy.c
@@ -0,0 +1,41 @@
+/*
+ * Functions which are too large to be inlined.
+ *
+ * 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 <linux/module.h>
+#include <asm/uaccess.h>
+
+unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+ if (likely(access_ok(VERIFY_READ, from, n)))
+ n = __copy_from_user(to, from, n);
+ else
+ memset(to, 0, n);
+ return n;
+}
+
+unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+ if (likely(access_ok(VERIFY_WRITE, to, n)))
+ n = __copy_to_user(to, from, n);
+ return n;
+}
+
+unsigned long copy_in_user(void __user *to, const void __user *from,
+ unsigned long n)
+{
+ might_sleep();
+ if (likely(access_ok(VERIFY_READ, from, n) &&
+ access_ok(VERIFY_WRITE, to, n)))
+ n =__copy_tofrom_user(to, from, n);
+ return n;
+}
+
+EXPORT_SYMBOL(copy_from_user);
+EXPORT_SYMBOL(copy_to_user);
+EXPORT_SYMBOL(copy_in_user);
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.