--- /dev/null
+/*
+ * User address space access functions.
+ * The non-inlined parts of asm-metag/uaccess.h are here.
+ *
+ * Copyright (C) 2006, Imagination Technologies.
+ * Copyright (C) 2000, Axis Communications AB.
+ *
+ * Written by Hans-Peter Nilsson.
+ * Pieces used from memcpy, originally by Kenny Ranerup long time ago.
+ * Modified for Meta by Will Newton.
+ */
+
+#include <linux/export.h>
+#include <linux/uaccess.h>
+#include <asm/cache.h> /* def of L1_CACHE_BYTES */
+
+#define USE_RAPF
+#define RAPF_MIN_BUF_SIZE (3*L1_CACHE_BYTES)
+
+
+/* The "double write" in this code is because the Meta will not fault
+ * immediately unless the memory pipe is forced to by e.g. a data stall or
+ * another memory op. The second write should be discarded by the write
+ * combiner so should have virtually no cost.
+ */
+
+#define __asm_copy_user_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ asm volatile ( \
+ COPY \
+ "1:\n" \
+ " .section .fixup,\"ax\"\n" \
+ " MOV D1Ar1,#0\n" \
+ FIXUP \
+ " MOVT D1Ar1,#HI(1b)\n" \
+ " JUMP D1Ar1,#LO(1b)\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ TENTRY \
+ " .previous\n" \
+ : "=r" (to), "=r" (from), "=r" (ret) \
+ : "0" (to), "1" (from), "2" (ret) \
+ : "D1Ar1", "memory")
+
+
+#define __asm_copy_to_user_1(to, from, ret) \
+ __asm_copy_user_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "2: SETB [%0++],D1Ar1\n", \
+ "3: ADD %2,%2,#1\n", \
+ " .long 2b,3b\n")
+
+#define __asm_copy_to_user_2x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_user_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ " SETW [%0],D1Ar1\n" \
+ "2: SETW [%0++],D1Ar1\n" COPY, \
+ "3: ADD %2,%2,#2\n" FIXUP, \
+ " .long 2b,3b\n" TENTRY)
+
+#define __asm_copy_to_user_2(to, from, ret) \
+ __asm_copy_to_user_2x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_3(to, from, ret) \
+ __asm_copy_to_user_2x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "4: SETB [%0++],D1Ar1\n", \
+ "5: ADD %2,%2,#1\n", \
+ " .long 4b,5b\n")
+
+#define __asm_copy_to_user_4x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_user_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ " SETD [%0],D1Ar1\n" \
+ "2: SETD [%0++],D1Ar1\n" COPY, \
+ "3: ADD %2,%2,#4\n" FIXUP, \
+ " .long 2b,3b\n" TENTRY)
+
+#define __asm_copy_to_user_4(to, from, ret) \
+ __asm_copy_to_user_4x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_5(to, from, ret) \
+ __asm_copy_to_user_4x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "4: SETB [%0++],D1Ar1\n", \
+ "5: ADD %2,%2,#1\n", \
+ " .long 4b,5b\n")
+
+#define __asm_copy_to_user_6x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_to_user_4x_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ " SETW [%0],D1Ar1\n" \
+ "4: SETW [%0++],D1Ar1\n" COPY, \
+ "5: ADD %2,%2,#2\n" FIXUP, \
+ " .long 4b,5b\n" TENTRY)
+
+#define __asm_copy_to_user_6(to, from, ret) \
+ __asm_copy_to_user_6x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_7(to, from, ret) \
+ __asm_copy_to_user_6x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "6: SETB [%0++],D1Ar1\n", \
+ "7: ADD %2,%2,#1\n", \
+ " .long 6b,7b\n")
+
+#define __asm_copy_to_user_8x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_to_user_4x_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ " SETD [%0],D1Ar1\n" \
+ "4: SETD [%0++],D1Ar1\n" COPY, \
+ "5: ADD %2,%2,#4\n" FIXUP, \
+ " .long 4b,5b\n" TENTRY)
+
+#define __asm_copy_to_user_8(to, from, ret) \
+ __asm_copy_to_user_8x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_9(to, from, ret) \
+ __asm_copy_to_user_8x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "6: SETB [%0++],D1Ar1\n", \
+ "7: ADD %2,%2,#1\n", \
+ " .long 6b,7b\n")
+
+#define __asm_copy_to_user_10x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_to_user_8x_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ " SETW [%0],D1Ar1\n" \
+ "6: SETW [%0++],D1Ar1\n" COPY, \
+ "7: ADD %2,%2,#2\n" FIXUP, \
+ " .long 6b,7b\n" TENTRY)
+
+#define __asm_copy_to_user_10(to, from, ret) \
+ __asm_copy_to_user_10x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_11(to, from, ret) \
+ __asm_copy_to_user_10x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "8: SETB [%0++],D1Ar1\n", \
+ "9: ADD %2,%2,#1\n", \
+ " .long 8b,9b\n")
+
+#define __asm_copy_to_user_12x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_to_user_8x_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ " SETD [%0],D1Ar1\n" \
+ "6: SETD [%0++],D1Ar1\n" COPY, \
+ "7: ADD %2,%2,#4\n" FIXUP, \
+ " .long 6b,7b\n" TENTRY)
+#define __asm_copy_to_user_12(to, from, ret) \
+ __asm_copy_to_user_12x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_13(to, from, ret) \
+ __asm_copy_to_user_12x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "8: SETB [%0++],D1Ar1\n", \
+ "9: ADD %2,%2,#1\n", \
+ " .long 8b,9b\n")
+
+#define __asm_copy_to_user_14x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_to_user_12x_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ " SETW [%0],D1Ar1\n" \
+ "8: SETW [%0++],D1Ar1\n" COPY, \
+ "9: ADD %2,%2,#2\n" FIXUP, \
+ " .long 8b,9b\n" TENTRY)
+
+#define __asm_copy_to_user_14(to, from, ret) \
+ __asm_copy_to_user_14x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_15(to, from, ret) \
+ __asm_copy_to_user_14x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ " SETB [%0],D1Ar1\n" \
+ "10: SETB [%0++],D1Ar1\n", \
+ "11: ADD %2,%2,#1\n", \
+ " .long 10b,11b\n")
+
+#define __asm_copy_to_user_16x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_to_user_12x_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ " SETD [%0],D1Ar1\n" \
+ "8: SETD [%0++],D1Ar1\n" COPY, \
+ "9: ADD %2,%2,#4\n" FIXUP, \
+ " .long 8b,9b\n" TENTRY)
+
+#define __asm_copy_to_user_16(to, from, ret) \
+ __asm_copy_to_user_16x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_to_user_8x64(to, from, ret) \
+ asm volatile ( \
+ " GETL D0Ar2,D1Ar1,[%1++]\n" \
+ " SETL [%0],D0Ar2,D1Ar1\n" \
+ "2: SETL [%0++],D0Ar2,D1Ar1\n" \
+ "1:\n" \
+ " .section .fixup,\"ax\"\n" \
+ "3: ADD %2,%2,#8\n" \
+ " MOVT D0Ar2,#HI(1b)\n" \
+ " JUMP D0Ar2,#LO(1b)\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .long 2b,3b\n" \
+ " .previous\n" \
+ : "=r" (to), "=r" (from), "=r" (ret) \
+ : "0" (to), "1" (from), "2" (ret) \
+ : "D1Ar1", "D0Ar2", "memory")
+
+/*
+ * optimized copying loop using RAPF when 64 bit aligned
+ *
+ * n will be automatically decremented inside the loop
+ * ret will be left intact. if error occurs we will rewind
+ * so that the original non optimized code will fill up
+ * this value correctly.
+ *
+ * on fault:
+ * > n will hold total number of uncopied bytes
+ *
+ * > {'to','from'} will be rewind back so that
+ * the non-optimized code will do the proper fix up
+ *
+ * DCACHE drops the cacheline which helps in reducing cache
+ * pollution.
+ *
+ * We introduce an extra SETL at the end of the loop to
+ * ensure we don't fall off the loop before we catch all
+ * erros.
+ *
+ * NOTICE:
+ * LSM_STEP in TXSTATUS must be cleared in fix up code.
+ * since we're using M{S,G}ETL, a fault might happen at
+ * any address in the middle of M{S,G}ETL causing
+ * the value of LSM_STEP to be incorrect which can
+ * cause subsequent use of M{S,G}ET{L,D} to go wrong.
+ * ie: if LSM_STEP was 1 when a fault occurs, the
+ * next call to M{S,G}ET{L,D} will skip the first
+ * copy/getting as it think that the first 1 has already
+ * been done.
+ *
+ */
+#define __asm_copy_user_64bit_rapf_loop( \
+ to, from, ret, n, id, FIXUP) \
+ asm volatile ( \
+ ".balign 8\n" \
+ "MOV RAPF, %1\n" \
+ "MSETL [A0StP++], D0Ar6, D0FrT, D0.5, D0.6, D0.7\n" \
+ "MOV D0Ar6, #0\n" \
+ "LSR D1Ar5, %3, #6\n" \
+ "SUB TXRPT, D1Ar5, #2\n" \
+ "MOV RAPF, %1\n" \
+ "$Lloop"id":\n" \
+ "ADD RAPF, %1, #64\n" \
+ "21:\n" \
+ "MGETL D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "22:\n" \
+ "MSETL [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #32\n" \
+ "23:\n" \
+ "MGETL D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "24:\n" \
+ "MSETL [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #32\n" \
+ "DCACHE [%1+#-64], D0Ar6\n" \
+ "BR $Lloop"id"\n" \
+ \
+ "MOV RAPF, %1\n" \
+ "25:\n" \
+ "MGETL D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "26:\n" \
+ "MSETL [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #32\n" \
+ "27:\n" \
+ "MGETL D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "28:\n" \
+ "MSETL [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %0, %0, #8\n" \
+ "29:\n" \
+ "SETL [%0++], D0.7, D1.7\n" \
+ "SUB %3, %3, #32\n" \
+ "1:" \
+ "DCACHE [%1+#-64], D0Ar6\n" \
+ "GETL D0Ar6, D1Ar5, [A0StP+#-40]\n" \
+ "GETL D0FrT, D1RtP, [A0StP+#-32]\n" \
+ "GETL D0.5, D1.5, [A0StP+#-24]\n" \
+ "GETL D0.6, D1.6, [A0StP+#-16]\n" \
+ "GETL D0.7, D1.7, [A0StP+#-8]\n" \
+ "SUB A0StP, A0StP, #40\n" \
+ " .section .fixup,\"ax\"\n" \
+ "4:\n" \
+ " ADD %0, %0, #8\n" \
+ "3:\n" \
+ " MOV D0Ar2, TXSTATUS\n" \
+ " MOV D1Ar1, TXSTATUS\n" \
+ " AND D1Ar1, D1Ar1, #0xFFFFF8FF\n" \
+ " MOV TXSTATUS, D1Ar1\n" \
+ FIXUP \
+ " MOVT D0Ar2,#HI(1b)\n" \
+ " JUMP D0Ar2,#LO(1b)\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .long 21b,3b\n" \
+ " .long 22b,3b\n" \
+ " .long 23b,3b\n" \
+ " .long 24b,3b\n" \
+ " .long 25b,3b\n" \
+ " .long 26b,3b\n" \
+ " .long 27b,3b\n" \
+ " .long 28b,3b\n" \
+ " .long 29b,4b\n" \
+ " .previous\n" \
+ : "=r" (to), "=r" (from), "=r" (ret), "=d" (n) \
+ : "0" (to), "1" (from), "2" (ret), "3" (n) \
+ : "D1Ar1", "D0Ar2", "memory")
+
+/* rewind 'to' and 'from' pointers when a fault occurs
+ *
+ * Rationale:
+ * A fault always occurs on writing to user buffer. A fault
+ * is at a single address, so we need to rewind by only 4
+ * bytes.
+ * Since we do a complete read from kernel buffer before
+ * writing, we need to rewind it also. The amount to be
+ * rewind equals the number of faulty writes in MSETD
+ * which is: [4 - (LSM_STEP-1)]*8
+ * LSM_STEP is bits 10:8 in TXSTATUS which is already read
+ * and stored in D0Ar2
+ *
+ * NOTE: If a fault occurs at the last operation in M{G,S}ETL
+ * LSM_STEP will be 0. ie: we do 4 writes in our case, if
+ * a fault happens at the 4th write, LSM_STEP will be 0
+ * instead of 4. The code copes with that.
+ *
+ * n is updated by the number of successful writes, which is:
+ * n = n - (LSM_STEP-1)*8
+ */
+#define __asm_copy_to_user_64bit_rapf_loop(to, from, ret, n, id)\
+ __asm_copy_user_64bit_rapf_loop(to, from, ret, n, id, \
+ "LSR D0Ar2, D0Ar2, #8\n" \
+ "AND D0Ar2, D0Ar2, #0x7\n" \
+ "ADDZ D0Ar2, D0Ar2, #4\n" \
+ "SUB D0Ar2, D0Ar2, #1\n" \
+ "MOV D1Ar1, #4\n" \
+ "SUB D0Ar2, D1Ar1, D0Ar2\n" \
+ "LSL D0Ar2, D0Ar2, #3\n" \
+ "LSL D1Ar1, D1Ar1, #3\n" \
+ "SUB D1Ar1, D1Ar1, D0Ar2\n" \
+ "SUB %0, %0, #8\n" \
+ "SUB %1, %1,D0Ar2\n" \
+ "SUB %3, %3, D1Ar1\n")
+
+/*
+ * optimized copying loop using RAPF when 32 bit aligned
+ *
+ * n will be automatically decremented inside the loop
+ * ret will be left intact. if error occurs we will rewind
+ * so that the original non optimized code will fill up
+ * this value correctly.
+ *
+ * on fault:
+ * > n will hold total number of uncopied bytes
+ *
+ * > {'to','from'} will be rewind back so that
+ * the non-optimized code will do the proper fix up
+ *
+ * DCACHE drops the cacheline which helps in reducing cache
+ * pollution.
+ *
+ * We introduce an extra SETD at the end of the loop to
+ * ensure we don't fall off the loop before we catch all
+ * erros.
+ *
+ * NOTICE:
+ * LSM_STEP in TXSTATUS must be cleared in fix up code.
+ * since we're using M{S,G}ETL, a fault might happen at
+ * any address in the middle of M{S,G}ETL causing
+ * the value of LSM_STEP to be incorrect which can
+ * cause subsequent use of M{S,G}ET{L,D} to go wrong.
+ * ie: if LSM_STEP was 1 when a fault occurs, the
+ * next call to M{S,G}ET{L,D} will skip the first
+ * copy/getting as it think that the first 1 has already
+ * been done.
+ *
+ */
+#define __asm_copy_user_32bit_rapf_loop( \
+ to, from, ret, n, id, FIXUP) \
+ asm volatile ( \
+ ".balign 8\n" \
+ "MOV RAPF, %1\n" \
+ "MSETL [A0StP++], D0Ar6, D0FrT, D0.5, D0.6, D0.7\n" \
+ "MOV D0Ar6, #0\n" \
+ "LSR D1Ar5, %3, #6\n" \
+ "SUB TXRPT, D1Ar5, #2\n" \
+ "MOV RAPF, %1\n" \
+ "$Lloop"id":\n" \
+ "ADD RAPF, %1, #64\n" \
+ "21:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "22:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "23:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "24:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "25:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "26:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "27:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "28:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "DCACHE [%1+#-64], D0Ar6\n" \
+ "BR $Lloop"id"\n" \
+ \
+ "MOV RAPF, %1\n" \
+ "29:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "30:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "31:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "32:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "33:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "34:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "35:\n" \
+ "MGETD D0FrT, D0.5, D0.6, D0.7, [%1++]\n" \
+ "36:\n" \
+ "MSETD [%0++], D0FrT, D0.5, D0.6, D0.7\n" \
+ "SUB %0, %0, #4\n" \
+ "37:\n" \
+ "SETD [%0++], D0.7\n" \
+ "SUB %3, %3, #16\n" \
+ "1:" \
+ "DCACHE [%1+#-64], D0Ar6\n" \
+ "GETL D0Ar6, D1Ar5, [A0StP+#-40]\n" \
+ "GETL D0FrT, D1RtP, [A0StP+#-32]\n" \
+ "GETL D0.5, D1.5, [A0StP+#-24]\n" \
+ "GETL D0.6, D1.6, [A0StP+#-16]\n" \
+ "GETL D0.7, D1.7, [A0StP+#-8]\n" \
+ "SUB A0StP, A0StP, #40\n" \
+ " .section .fixup,\"ax\"\n" \
+ "4:\n" \
+ " ADD %0, %0, #4\n" \
+ "3:\n" \
+ " MOV D0Ar2, TXSTATUS\n" \
+ " MOV D1Ar1, TXSTATUS\n" \
+ " AND D1Ar1, D1Ar1, #0xFFFFF8FF\n" \
+ " MOV TXSTATUS, D1Ar1\n" \
+ FIXUP \
+ " MOVT D0Ar2,#HI(1b)\n" \
+ " JUMP D0Ar2,#LO(1b)\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .long 21b,3b\n" \
+ " .long 22b,3b\n" \
+ " .long 23b,3b\n" \
+ " .long 24b,3b\n" \
+ " .long 25b,3b\n" \
+ " .long 26b,3b\n" \
+ " .long 27b,3b\n" \
+ " .long 28b,3b\n" \
+ " .long 29b,3b\n" \
+ " .long 30b,3b\n" \
+ " .long 31b,3b\n" \
+ " .long 32b,3b\n" \
+ " .long 33b,3b\n" \
+ " .long 34b,3b\n" \
+ " .long 35b,3b\n" \
+ " .long 36b,3b\n" \
+ " .long 37b,4b\n" \
+ " .previous\n" \
+ : "=r" (to), "=r" (from), "=r" (ret), "=d" (n) \
+ : "0" (to), "1" (from), "2" (ret), "3" (n) \
+ : "D1Ar1", "D0Ar2", "memory")
+
+/* rewind 'to' and 'from' pointers when a fault occurs
+ *
+ * Rationale:
+ * A fault always occurs on writing to user buffer. A fault
+ * is at a single address, so we need to rewind by only 4
+ * bytes.
+ * Since we do a complete read from kernel buffer before
+ * writing, we need to rewind it also. The amount to be
+ * rewind equals the number of faulty writes in MSETD
+ * which is: [4 - (LSM_STEP-1)]*4
+ * LSM_STEP is bits 10:8 in TXSTATUS which is already read
+ * and stored in D0Ar2
+ *
+ * NOTE: If a fault occurs at the last operation in M{G,S}ETL
+ * LSM_STEP will be 0. ie: we do 4 writes in our case, if
+ * a fault happens at the 4th write, LSM_STEP will be 0
+ * instead of 4. The code copes with that.
+ *
+ * n is updated by the number of successful writes, which is:
+ * n = n - (LSM_STEP-1)*4
+ */
+#define __asm_copy_to_user_32bit_rapf_loop(to, from, ret, n, id)\
+ __asm_copy_user_32bit_rapf_loop(to, from, ret, n, id, \
+ "LSR D0Ar2, D0Ar2, #8\n" \
+ "AND D0Ar2, D0Ar2, #0x7\n" \
+ "ADDZ D0Ar2, D0Ar2, #4\n" \
+ "SUB D0Ar2, D0Ar2, #1\n" \
+ "MOV D1Ar1, #4\n" \
+ "SUB D0Ar2, D1Ar1, D0Ar2\n" \
+ "LSL D0Ar2, D0Ar2, #2\n" \
+ "LSL D1Ar1, D1Ar1, #2\n" \
+ "SUB D1Ar1, D1Ar1, D0Ar2\n" \
+ "SUB %0, %0, #4\n" \
+ "SUB %1, %1, D0Ar2\n" \
+ "SUB %3, %3, D1Ar1\n")
+
+unsigned long __copy_user(void __user *pdst, const void *psrc,
+ unsigned long n)
+{
+ register char __user *dst asm ("A0.2") = pdst;
+ register const char *src asm ("A1.2") = psrc;
+ unsigned long retn = 0;
+
+ if (n == 0)
+ return 0;
+
+ if ((unsigned long) src & 1) {
+ __asm_copy_to_user_1(dst, src, retn);
+ n--;
+ }
+ if ((unsigned long) dst & 1) {
+ /* Worst case - byte copy */
+ while (n > 0) {
+ __asm_copy_to_user_1(dst, src, retn);
+ n--;
+ }
+ }
+ if (((unsigned long) src & 2) && n >= 2) {
+ __asm_copy_to_user_2(dst, src, retn);
+ n -= 2;
+ }
+ if ((unsigned long) dst & 2) {
+ /* Second worst case - word copy */
+ while (n >= 2) {
+ __asm_copy_to_user_2(dst, src, retn);
+ n -= 2;
+ }
+ }
+
+#ifdef USE_RAPF
+ /* 64 bit copy loop */
+ if (!(((unsigned long) src | (__force unsigned long) dst) & 7)) {
+ if (n >= RAPF_MIN_BUF_SIZE) {
+ /* copy user using 64 bit rapf copy */
+ __asm_copy_to_user_64bit_rapf_loop(dst, src, retn,
+ n, "64cu");
+ }
+ while (n >= 8) {
+ __asm_copy_to_user_8x64(dst, src, retn);
+ n -= 8;
+ }
+ }
+ if (n >= RAPF_MIN_BUF_SIZE) {
+ /* copy user using 32 bit rapf copy */
+ __asm_copy_to_user_32bit_rapf_loop(dst, src, retn, n, "32cu");
+ }
+#else
+ /* 64 bit copy loop */
+ if (!(((unsigned long) src | (__force unsigned long) dst) & 7)) {
+ while (n >= 8) {
+ __asm_copy_to_user_8x64(dst, src, retn);
+ n -= 8;
+ }
+ }
+#endif
+
+ while (n >= 16) {
+ __asm_copy_to_user_16(dst, src, retn);
+ n -= 16;
+ }
+
+ while (n >= 4) {
+ __asm_copy_to_user_4(dst, src, retn);
+ n -= 4;
+ }
+
+ switch (n) {
+ case 0:
+ break;
+ case 1:
+ __asm_copy_to_user_1(dst, src, retn);
+ break;
+ case 2:
+ __asm_copy_to_user_2(dst, src, retn);
+ break;
+ case 3:
+ __asm_copy_to_user_3(dst, src, retn);
+ break;
+ }
+
+ return retn;
+}
+EXPORT_SYMBOL(__copy_user);
+
+#define __asm_copy_from_user_1(to, from, ret) \
+ __asm_copy_user_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "2: SETB [%0++],D1Ar1\n", \
+ "3: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 2b,3b\n")
+
+#define __asm_copy_from_user_2x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_user_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ "2: SETW [%0++],D1Ar1\n" COPY, \
+ "3: ADD %2,%2,#2\n" \
+ " SETW [%0++],D1Ar1\n" FIXUP, \
+ " .long 2b,3b\n" TENTRY)
+
+#define __asm_copy_from_user_2(to, from, ret) \
+ __asm_copy_from_user_2x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_3(to, from, ret) \
+ __asm_copy_from_user_2x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "4: SETB [%0++],D1Ar1\n", \
+ "5: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 4b,5b\n")
+
+#define __asm_copy_from_user_4x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_user_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ "2: SETD [%0++],D1Ar1\n" COPY, \
+ "3: ADD %2,%2,#4\n" \
+ " SETD [%0++],D1Ar1\n" FIXUP, \
+ " .long 2b,3b\n" TENTRY)
+
+#define __asm_copy_from_user_4(to, from, ret) \
+ __asm_copy_from_user_4x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_5(to, from, ret) \
+ __asm_copy_from_user_4x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "4: SETB [%0++],D1Ar1\n", \
+ "5: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 4b,5b\n")
+
+#define __asm_copy_from_user_6x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_from_user_4x_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ "4: SETW [%0++],D1Ar1\n" COPY, \
+ "5: ADD %2,%2,#2\n" \
+ " SETW [%0++],D1Ar1\n" FIXUP, \
+ " .long 4b,5b\n" TENTRY)
+
+#define __asm_copy_from_user_6(to, from, ret) \
+ __asm_copy_from_user_6x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_7(to, from, ret) \
+ __asm_copy_from_user_6x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "6: SETB [%0++],D1Ar1\n", \
+ "7: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 6b,7b\n")
+
+#define __asm_copy_from_user_8x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_from_user_4x_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ "4: SETD [%0++],D1Ar1\n" COPY, \
+ "5: ADD %2,%2,#4\n" \
+ " SETD [%0++],D1Ar1\n" FIXUP, \
+ " .long 4b,5b\n" TENTRY)
+
+#define __asm_copy_from_user_8(to, from, ret) \
+ __asm_copy_from_user_8x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_9(to, from, ret) \
+ __asm_copy_from_user_8x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "6: SETB [%0++],D1Ar1\n", \
+ "7: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 6b,7b\n")
+
+#define __asm_copy_from_user_10x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_from_user_8x_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ "6: SETW [%0++],D1Ar1\n" COPY, \
+ "7: ADD %2,%2,#2\n" \
+ " SETW [%0++],D1Ar1\n" FIXUP, \
+ " .long 6b,7b\n" TENTRY)
+
+#define __asm_copy_from_user_10(to, from, ret) \
+ __asm_copy_from_user_10x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_11(to, from, ret) \
+ __asm_copy_from_user_10x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "8: SETB [%0++],D1Ar1\n", \
+ "9: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 8b,9b\n")
+
+#define __asm_copy_from_user_12x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_from_user_8x_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ "6: SETD [%0++],D1Ar1\n" COPY, \
+ "7: ADD %2,%2,#4\n" \
+ " SETD [%0++],D1Ar1\n" FIXUP, \
+ " .long 6b,7b\n" TENTRY)
+
+#define __asm_copy_from_user_12(to, from, ret) \
+ __asm_copy_from_user_12x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_13(to, from, ret) \
+ __asm_copy_from_user_12x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "8: SETB [%0++],D1Ar1\n", \
+ "9: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 8b,9b\n")
+
+#define __asm_copy_from_user_14x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_from_user_12x_cont(to, from, ret, \
+ " GETW D1Ar1,[%1++]\n" \
+ "8: SETW [%0++],D1Ar1\n" COPY, \
+ "9: ADD %2,%2,#2\n" \
+ " SETW [%0++],D1Ar1\n" FIXUP, \
+ " .long 8b,9b\n" TENTRY)
+
+#define __asm_copy_from_user_14(to, from, ret) \
+ __asm_copy_from_user_14x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_15(to, from, ret) \
+ __asm_copy_from_user_14x_cont(to, from, ret, \
+ " GETB D1Ar1,[%1++]\n" \
+ "10: SETB [%0++],D1Ar1\n", \
+ "11: ADD %2,%2,#1\n" \
+ " SETB [%0++],D1Ar1\n", \
+ " .long 10b,11b\n")
+
+#define __asm_copy_from_user_16x_cont(to, from, ret, COPY, FIXUP, TENTRY) \
+ __asm_copy_from_user_12x_cont(to, from, ret, \
+ " GETD D1Ar1,[%1++]\n" \
+ "8: SETD [%0++],D1Ar1\n" COPY, \
+ "9: ADD %2,%2,#4\n" \
+ " SETD [%0++],D1Ar1\n" FIXUP, \
+ " .long 8b,9b\n" TENTRY)
+
+#define __asm_copy_from_user_16(to, from, ret) \
+ __asm_copy_from_user_16x_cont(to, from, ret, "", "", "")
+
+#define __asm_copy_from_user_8x64(to, from, ret) \
+ asm volatile ( \
+ " GETL D0Ar2,D1Ar1,[%1++]\n" \
+ "2: SETL [%0++],D0Ar2,D1Ar1\n" \
+ "1:\n" \
+ " .section .fixup,\"ax\"\n" \
+ " MOV D1Ar1,#0\n" \
+ " MOV D0Ar2,#0\n" \
+ "3: ADD %2,%2,#8\n" \
+ " SETL [%0++],D0Ar2,D1Ar1\n" \
+ " MOVT D0Ar2,#HI(1b)\n" \
+ " JUMP D0Ar2,#LO(1b)\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .long 2b,3b\n" \
+ " .previous\n" \
+ : "=a" (to), "=r" (from), "=r" (ret) \
+ : "0" (to), "1" (from), "2" (ret) \
+ : "D1Ar1", "D0Ar2", "memory")
+
+/* rewind 'from' pointer when a fault occurs
+ *
+ * Rationale:
+ * A fault occurs while reading from user buffer, which is the
+ * source. Since the fault is at a single address, we only
+ * need to rewind by 8 bytes.
+ * Since we don't write to kernel buffer until we read first,
+ * the kernel buffer is at the right state and needn't be
+ * corrected.
+ */
+#define __asm_copy_from_user_64bit_rapf_loop(to, from, ret, n, id) \
+ __asm_copy_user_64bit_rapf_loop(to, from, ret, n, id, \
+ "SUB %1, %1, #8\n")
+
+/* rewind 'from' pointer when a fault occurs
+ *
+ * Rationale:
+ * A fault occurs while reading from user buffer, which is the
+ * source. Since the fault is at a single address, we only
+ * need to rewind by 4 bytes.
+ * Since we don't write to kernel buffer until we read first,
+ * the kernel buffer is at the right state and needn't be
+ * corrected.
+ */
+#define __asm_copy_from_user_32bit_rapf_loop(to, from, ret, n, id) \
+ __asm_copy_user_32bit_rapf_loop(to, from, ret, n, id, \
+ "SUB %1, %1, #4\n")
+
+
+/* Copy from user to kernel, zeroing the bytes that were inaccessible in
+ userland. The return-value is the number of bytes that were
+ inaccessible. */
+unsigned long __copy_user_zeroing(void *pdst, const void __user *psrc,
+ unsigned long n)
+{
+ register char *dst asm ("A0.2") = pdst;
+ register const char __user *src asm ("A1.2") = psrc;
+ unsigned long retn = 0;
+
+ if (n == 0)
+ return 0;
+
+ if ((unsigned long) src & 1) {
+ __asm_copy_from_user_1(dst, src, retn);
+ n--;
+ }
+ if ((unsigned long) dst & 1) {
+ /* Worst case - byte copy */
+ while (n > 0) {
+ __asm_copy_from_user_1(dst, src, retn);
+ n--;
+ if (retn)
+ goto copy_exception_bytes;
+ }
+ }
+ if (((unsigned long) src & 2) && n >= 2) {
+ __asm_copy_from_user_2(dst, src, retn);
+ n -= 2;
+ }
+ if ((unsigned long) dst & 2) {
+ /* Second worst case - word copy */
+ while (n >= 2) {
+ __asm_copy_from_user_2(dst, src, retn);
+ n -= 2;
+ if (retn)
+ goto copy_exception_bytes;
+ }
+ }
+
+ /* We only need one check after the unalignment-adjustments,
+ because if both adjustments were done, either both or
+ neither reference had an exception. */
+ if (retn != 0)
+ goto copy_exception_bytes;
+
+#ifdef USE_RAPF
+ /* 64 bit copy loop */
+ if (!(((unsigned long) src | (unsigned long) dst) & 7)) {
+ if (n >= RAPF_MIN_BUF_SIZE) {
+ /* Copy using fast 64bit rapf */
+ __asm_copy_from_user_64bit_rapf_loop(dst, src, retn,
+ n, "64cuz");
+ }
+ while (n >= 8) {
+ __asm_copy_from_user_8x64(dst, src, retn);
+ n -= 8;
+ if (retn)
+ goto copy_exception_bytes;
+ }
+ }
+
+ if (n >= RAPF_MIN_BUF_SIZE) {
+ /* Copy using fast 32bit rapf */
+ __asm_copy_from_user_32bit_rapf_loop(dst, src, retn,
+ n, "32cuz");
+ }
+#else
+ /* 64 bit copy loop */
+ if (!(((unsigned long) src | (unsigned long) dst) & 7)) {
+ while (n >= 8) {
+ __asm_copy_from_user_8x64(dst, src, retn);
+ n -= 8;
+ if (retn)
+ goto copy_exception_bytes;
+ }
+ }
+#endif
+
+ while (n >= 4) {
+ __asm_copy_from_user_4(dst, src, retn);
+ n -= 4;
+
+ if (retn)
+ goto copy_exception_bytes;
+ }
+
+ /* If we get here, there were no memory read faults. */
+ switch (n) {
+ /* These copies are at least "naturally aligned" (so we don't
+ have to check each byte), due to the src alignment code.
+ The *_3 case *will* get the correct count for retn. */
+ case 0:
+ /* This case deliberately left in (if you have doubts check the
+ generated assembly code). */
+ break;
+ case 1:
+ __asm_copy_from_user_1(dst, src, retn);
+ break;
+ case 2:
+ __asm_copy_from_user_2(dst, src, retn);
+ break;
+ case 3:
+ __asm_copy_from_user_3(dst, src, retn);
+ break;
+ }
+
+ /* If we get here, retn correctly reflects the number of failing
+ bytes. */
+ return retn;
+
+ copy_exception_bytes:
+ /* We already have "retn" bytes cleared, and need to clear the
+ remaining "n" bytes. A non-optimized simple byte-for-byte in-line
+ memset is preferred here, since this isn't speed-critical code and
+ we'd rather have this a leaf-function than calling memset. */
+ {
+ char *endp;
+ for (endp = dst + n; dst < endp; dst++)
+ *dst = 0;
+ }
+
+ return retn + n;
+}
+EXPORT_SYMBOL(__copy_user_zeroing);
+
+#define __asm_clear_8x64(to, ret) \
+ asm volatile ( \
+ " MOV D0Ar2,#0\n" \
+ " MOV D1Ar1,#0\n" \
+ " SETL [%0],D0Ar2,D1Ar1\n" \
+ "2: SETL [%0++],D0Ar2,D1Ar1\n" \
+ "1:\n" \
+ " .section .fixup,\"ax\"\n" \
+ "3: ADD %1,%1,#8\n" \
+ " MOVT D0Ar2,#HI(1b)\n" \
+ " JUMP D0Ar2,#LO(1b)\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .long 2b,3b\n" \
+ " .previous\n" \
+ : "=r" (to), "=r" (ret) \
+ : "0" (to), "1" (ret) \
+ : "D1Ar1", "D0Ar2", "memory")
+
+/* Zero userspace. */
+
+#define __asm_clear(to, ret, CLEAR, FIXUP, TENTRY) \
+ asm volatile ( \
+ " MOV D1Ar1,#0\n" \
+ CLEAR \
+ "1:\n" \
+ " .section .fixup,\"ax\"\n" \
+ FIXUP \
+ " MOVT D1Ar1,#HI(1b)\n" \
+ " JUMP D1Ar1,#LO(1b)\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ TENTRY \
+ " .previous" \
+ : "=r" (to), "=r" (ret) \
+ : "0" (to), "1" (ret) \
+ : "D1Ar1", "memory")
+
+#define __asm_clear_1(to, ret) \
+ __asm_clear(to, ret, \
+ " SETB [%0],D1Ar1\n" \
+ "2: SETB [%0++],D1Ar1\n", \
+ "3: ADD %1,%1,#1\n", \
+ " .long 2b,3b\n")
+
+#define __asm_clear_2(to, ret) \
+ __asm_clear(to, ret, \
+ " SETW [%0],D1Ar1\n" \
+ "2: SETW [%0++],D1Ar1\n", \
+ "3: ADD %1,%1,#2\n", \
+ " .long 2b,3b\n")
+
+#define __asm_clear_3(to, ret) \
+ __asm_clear(to, ret, \
+ "2: SETW [%0++],D1Ar1\n" \
+ " SETB [%0],D1Ar1\n" \
+ "3: SETB [%0++],D1Ar1\n", \
+ "4: ADD %1,%1,#2\n" \
+ "5: ADD %1,%1,#1\n", \
+ " .long 2b,4b\n" \
+ " .long 3b,5b\n")
+
+#define __asm_clear_4x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
+ __asm_clear(to, ret, \
+ " SETD [%0],D1Ar1\n" \
+ "2: SETD [%0++],D1Ar1\n" CLEAR, \
+ "3: ADD %1,%1,#4\n" FIXUP, \
+ " .long 2b,3b\n" TENTRY)
+
+#define __asm_clear_4(to, ret) \
+ __asm_clear_4x_cont(to, ret, "", "", "")
+
+#define __asm_clear_8x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
+ __asm_clear_4x_cont(to, ret, \
+ " SETD [%0],D1Ar1\n" \
+ "4: SETD [%0++],D1Ar1\n" CLEAR, \
+ "5: ADD %1,%1,#4\n" FIXUP, \
+ " .long 4b,5b\n" TENTRY)
+
+#define __asm_clear_8(to, ret) \
+ __asm_clear_8x_cont(to, ret, "", "", "")
+
+#define __asm_clear_12x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
+ __asm_clear_8x_cont(to, ret, \
+ " SETD [%0],D1Ar1\n" \
+ "6: SETD [%0++],D1Ar1\n" CLEAR, \
+ "7: ADD %1,%1,#4\n" FIXUP, \
+ " .long 6b,7b\n" TENTRY)
+
+#define __asm_clear_12(to, ret) \
+ __asm_clear_12x_cont(to, ret, "", "", "")
+
+#define __asm_clear_16x_cont(to, ret, CLEAR, FIXUP, TENTRY) \
+ __asm_clear_12x_cont(to, ret, \
+ " SETD [%0],D1Ar1\n" \
+ "8: SETD [%0++],D1Ar1\n" CLEAR, \
+ "9: ADD %1,%1,#4\n" FIXUP, \
+ " .long 8b,9b\n" TENTRY)
+
+#define __asm_clear_16(to, ret) \
+ __asm_clear_16x_cont(to, ret, "", "", "")
+
+unsigned long __do_clear_user(void __user *pto, unsigned long pn)
+{
+ register char __user *dst asm ("D0Re0") = pto;
+ register unsigned long n asm ("D1Re0") = pn;
+ register unsigned long retn asm ("D0Ar6") = 0;
+
+ if ((unsigned long) dst & 1) {
+ __asm_clear_1(dst, retn);
+ n--;
+ }
+
+ if ((unsigned long) dst & 2) {
+ __asm_clear_2(dst, retn);
+ n -= 2;
+ }
+
+ /* 64 bit copy loop */
+ if (!((__force unsigned long) dst & 7)) {
+ while (n >= 8) {
+ __asm_clear_8x64(dst, retn);
+ n -= 8;
+ }
+ }
+
+ while (n >= 16) {
+ __asm_clear_16(dst, retn);
+ n -= 16;
+ }
+
+ while (n >= 4) {
+ __asm_clear_4(dst, retn);
+ n -= 4;
+ }
+
+ switch (n) {
+ case 0:
+ break;
+ case 1:
+ __asm_clear_1(dst, retn);
+ break;
+ case 2:
+ __asm_clear_2(dst, retn);
+ break;
+ case 3:
+ __asm_clear_3(dst, retn);
+ break;
+ }
+
+ return retn;
+}
+EXPORT_SYMBOL(__do_clear_user);
+
+unsigned char __get_user_asm_b(const void __user *addr, long *err)
+{
+ register unsigned char x asm ("D0Re0") = 0;
+ asm volatile (
+ " GETB %0,[%2]\n"
+ "1:\n"
+ " GETB %0,[%2]\n"
+ "2:\n"
+ " .section .fixup,\"ax\"\n"
+ "3: MOV D0FrT,%3\n"
+ " SETD [%1],D0FrT\n"
+ " MOVT D0FrT,#HI(2b)\n"
+ " JUMP D0FrT,#LO(2b)\n"
+ " .previous\n"
+ " .section __ex_table,\"a\"\n"
+ " .long 1b,3b\n"
+ " .previous\n"
+ : "=r" (x)
+ : "r" (err), "r" (addr), "P" (-EFAULT)
+ : "D0FrT");
+ return x;
+}
+EXPORT_SYMBOL(__get_user_asm_b);
+
+unsigned short __get_user_asm_w(const void __user *addr, long *err)
+{
+ register unsigned short x asm ("D0Re0") = 0;
+ asm volatile (
+ " GETW %0,[%2]\n"
+ "1:\n"
+ " GETW %0,[%2]\n"
+ "2:\n"
+ " .section .fixup,\"ax\"\n"
+ "3: MOV D0FrT,%3\n"
+ " SETD [%1],D0FrT\n"
+ " MOVT D0FrT,#HI(2b)\n"
+ " JUMP D0FrT,#LO(2b)\n"
+ " .previous\n"
+ " .section __ex_table,\"a\"\n"
+ " .long 1b,3b\n"
+ " .previous\n"
+ : "=r" (x)
+ : "r" (err), "r" (addr), "P" (-EFAULT)
+ : "D0FrT");
+ return x;
+}
+EXPORT_SYMBOL(__get_user_asm_w);
+
+unsigned int __get_user_asm_d(const void __user *addr, long *err)
+{
+ register unsigned int x asm ("D0Re0") = 0;
+ asm volatile (
+ " GETD %0,[%2]\n"
+ "1:\n"
+ " GETD %0,[%2]\n"
+ "2:\n"
+ " .section .fixup,\"ax\"\n"
+ "3: MOV D0FrT,%3\n"
+ " SETD [%1],D0FrT\n"
+ " MOVT D0FrT,#HI(2b)\n"
+ " JUMP D0FrT,#LO(2b)\n"
+ " .previous\n"
+ " .section __ex_table,\"a\"\n"
+ " .long 1b,3b\n"
+ " .previous\n"
+ : "=r" (x)
+ : "r" (err), "r" (addr), "P" (-EFAULT)
+ : "D0FrT");
+ return x;
+}
+EXPORT_SYMBOL(__get_user_asm_d);
+
+long __put_user_asm_b(unsigned int x, void __user *addr)
+{
+ register unsigned int err asm ("D0Re0") = 0;
+ asm volatile (
+ " MOV %0,#0\n"
+ " SETB [%2],%1\n"
+ "1:\n"
+ " SETB [%2],%1\n"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ "3: MOV %0,%3\n"
+ " MOVT D0FrT,#HI(2b)\n"
+ " JUMP D0FrT,#LO(2b)\n"
+ ".previous\n"
+ ".section __ex_table,\"a\"\n"
+ " .long 1b,3b\n"
+ ".previous"
+ : "=r"(err)
+ : "d" (x), "a" (addr), "P"(-EFAULT)
+ : "D0FrT");
+ return err;
+}
+EXPORT_SYMBOL(__put_user_asm_b);
+
+long __put_user_asm_w(unsigned int x, void __user *addr)
+{
+ register unsigned int err asm ("D0Re0") = 0;
+ asm volatile (
+ " MOV %0,#0\n"
+ " SETW [%2],%1\n"
+ "1:\n"
+ " SETW [%2],%1\n"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ "3: MOV %0,%3\n"
+ " MOVT D0FrT,#HI(2b)\n"
+ " JUMP D0FrT,#LO(2b)\n"
+ ".previous\n"
+ ".section __ex_table,\"a\"\n"
+ " .long 1b,3b\n"
+ ".previous"
+ : "=r"(err)
+ : "d" (x), "a" (addr), "P"(-EFAULT)
+ : "D0FrT");
+ return err;
+}
+EXPORT_SYMBOL(__put_user_asm_w);
+
+long __put_user_asm_d(unsigned int x, void __user *addr)
+{
+ register unsigned int err asm ("D0Re0") = 0;
+ asm volatile (
+ " MOV %0,#0\n"
+ " SETD [%2],%1\n"
+ "1:\n"
+ " SETD [%2],%1\n"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ "3: MOV %0,%3\n"
+ " MOVT D0FrT,#HI(2b)\n"
+ " JUMP D0FrT,#LO(2b)\n"
+ ".previous\n"
+ ".section __ex_table,\"a\"\n"
+ " .long 1b,3b\n"
+ ".previous"
+ : "=r"(err)
+ : "d" (x), "a" (addr), "P"(-EFAULT)
+ : "D0FrT");
+ return err;
+}
+EXPORT_SYMBOL(__put_user_asm_d);
+
+long __put_user_asm_l(unsigned long long x, void __user *addr)
+{
+ register unsigned int err asm ("D0Re0") = 0;
+ asm volatile (
+ " MOV %0,#0\n"
+ " SETL [%2],%1,%t1\n"
+ "1:\n"
+ " SETL [%2],%1,%t1\n"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ "3: MOV %0,%3\n"
+ " MOVT D0FrT,#HI(2b)\n"
+ " JUMP D0FrT,#LO(2b)\n"
+ ".previous\n"
+ ".section __ex_table,\"a\"\n"
+ " .long 1b,3b\n"
+ ".previous"
+ : "=r"(err)
+ : "d" (x), "a" (addr), "P"(-EFAULT)
+ : "D0FrT");
+ return err;
+}
+EXPORT_SYMBOL(__put_user_asm_l);
+
+long strnlen_user(const char __user *src, long count)
+{
+ long res;
+
+ if (!access_ok(VERIFY_READ, src, 0))
+ return 0;
+
+ asm volatile (" MOV D0Ar4, %1\n"
+ " MOV D0Ar6, %2\n"
+ "0:\n"
+ " SUBS D0FrT, D0Ar6, #0\n"
+ " SUB D0Ar6, D0Ar6, #1\n"
+ " BLE 2f\n"
+ " GETB D0FrT, [D0Ar4+#1++]\n"
+ "1:\n"
+ " TST D0FrT, #255\n"
+ " BNE 0b\n"
+ "2:\n"
+ " SUB %0, %2, D0Ar6\n"
+ "3:\n"
+ " .section .fixup,\"ax\"\n"
+ "4:\n"
+ " MOV %0, #0\n"
+ " MOVT D0FrT,#HI(3b)\n"
+ " JUMP D0FrT,#LO(3b)\n"
+ " .previous\n"
+ " .section __ex_table,\"a\"\n"
+ " .long 1b,4b\n"
+ " .previous\n"
+ : "=r" (res)
+ : "r" (src), "r" (count)
+ : "D0FrT", "D0Ar4", "D0Ar6", "cc");
+
+ return res;
+}
+EXPORT_SYMBOL(strnlen_user);
+
+long __strncpy_from_user(char *dst, const char __user *src, long count)
+{
+ long res;
+
+ if (count == 0)
+ return 0;
+
+ /*
+ * Currently, in 2.4.0-test9, most ports use a simple byte-copy loop.
+ * So do we.
+ *
+ * This code is deduced from:
+ *
+ * char tmp2;
+ * long tmp1, tmp3;
+ * tmp1 = count;
+ * while ((*dst++ = (tmp2 = *src++)) != 0
+ * && --tmp1)
+ * ;
+ *
+ * res = count - tmp1;
+ *
+ * with tweaks.
+ */
+
+ asm volatile (" MOV %0,%3\n"
+ "1:\n"
+ " GETB D0FrT,[%2++]\n"
+ "2:\n"
+ " CMP D0FrT,#0\n"
+ " SETB [%1++],D0FrT\n"
+ " BEQ 3f\n"
+ " SUBS %0,%0,#1\n"
+ " BNZ 1b\n"
+ "3:\n"
+ " SUB %0,%3,%0\n"
+ "4:\n"
+ " .section .fixup,\"ax\"\n"
+ "5:\n"
+ " MOV %0,%7\n"
+ " MOVT D0FrT,#HI(4b)\n"
+ " JUMP D0FrT,#LO(4b)\n"
+ " .previous\n"
+ " .section __ex_table,\"a\"\n"
+ " .long 2b,5b\n"
+ " .previous"
+ : "=r" (res), "=r" (dst), "=r" (src), "=r" (count)
+ : "3" (count), "1" (dst), "2" (src), "P" (-EFAULT)
+ : "D0FrT", "memory", "cc");
+
+ return res;
+}
+EXPORT_SYMBOL(__strncpy_from_user);
Code Review / kvmfornfv.git / blobdiff