1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 #include <linux/linkage.h> 4 #include <asm/asm.h> 5 #include <asm/asm-extable.h> 6 #include <asm/csr.h> 7 8 #define pDst a0 9 #define pSrc a1 10 #define iNum a2 11 12 #define iVL a3 13 14 #define ELEM_LMUL_SETTING m8 15 #define vData v0 16 17 .macro fixup op reg addr lbl 18 100: 19 \op \reg, \addr 20 _asm_extable 100b, \lbl 21 .endm 22 23 SYM_FUNC_START(__asm_vector_usercopy) 24 /* Enable access to user memory */ 25 li t6, SR_SUM 26 csrs CSR_STATUS, t6 27 28 loop: 29 vsetvli iVL, iNum, e8, ELEM_LMUL_SETTING, ta, ma 30 fixup vle8.v vData, (pSrc), 10f 31 sub iNum, iNum, iVL 32 add pSrc, pSrc, iVL 33 fixup vse8.v vData, (pDst), 11f 34 add pDst, pDst, iVL 35 bnez iNum, loop 36 37 /* Exception fixup for vector load is shared with normal exit */ 38 10: 39 /* Disable access to user memory */ 40 csrc CSR_STATUS, t6 41 mv a0, iNum 42 ret 43 44 /* Exception fixup code for vector store. */ 45 11: 46 /* Undo the subtraction after vle8.v */ 47 add iNum, iNum, iVL 48 /* Make sure the scalar fallback skip already processed bytes */ 49 csrr t2, CSR_VSTART 50 sub iNum, iNum, t2 51 j 10b 52 SYM_FUNC_END(__asm_vector_usercopy)
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