1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* NG4copy_page.S: Niagara-4 optimized copy page. 3 * 4 * Copyright (C) 2012 (davem@davemloft.net) 5 */ 6 7 #include <asm/asi.h> 8 #include <asm/page.h> 9 10 .text 11 .align 32 12 13 .register %g2, #scratch 14 .register %g3, #scratch 15 16 .globl NG4copy_user_page 17 NG4copy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */ 18 prefetch [%o1 + 0x000], #n_reads_strong 19 prefetch [%o1 + 0x040], #n_reads_strong 20 prefetch [%o1 + 0x080], #n_reads_strong 21 prefetch [%o1 + 0x0c0], #n_reads_strong 22 set PAGE_SIZE, %g7 23 prefetch [%o1 + 0x100], #n_reads_strong 24 prefetch [%o1 + 0x140], #n_reads_strong 25 prefetch [%o1 + 0x180], #n_reads_strong 26 prefetch [%o1 + 0x1c0], #n_reads_strong 27 1: 28 ldx [%o1 + 0x00], %o2 29 subcc %g7, 0x40, %g7 30 ldx [%o1 + 0x08], %o3 31 ldx [%o1 + 0x10], %o4 32 ldx [%o1 + 0x18], %o5 33 ldx [%o1 + 0x20], %g1 34 stxa %o2, [%o0] ASI_ST_BLKINIT_MRU_P 35 add %o0, 0x08, %o0 36 ldx [%o1 + 0x28], %g2 37 stxa %o3, [%o0] ASI_ST_BLKINIT_MRU_P 38 add %o0, 0x08, %o0 39 ldx [%o1 + 0x30], %g3 40 stxa %o4, [%o0] ASI_ST_BLKINIT_MRU_P 41 add %o0, 0x08, %o0 42 ldx [%o1 + 0x38], %o2 43 add %o1, 0x40, %o1 44 stxa %o5, [%o0] ASI_ST_BLKINIT_MRU_P 45 add %o0, 0x08, %o0 46 stxa %g1, [%o0] ASI_ST_BLKINIT_MRU_P 47 add %o0, 0x08, %o0 48 stxa %g2, [%o0] ASI_ST_BLKINIT_MRU_P 49 add %o0, 0x08, %o0 50 stxa %g3, [%o0] ASI_ST_BLKINIT_MRU_P 51 add %o0, 0x08, %o0 52 stxa %o2, [%o0] ASI_ST_BLKINIT_MRU_P 53 add %o0, 0x08, %o0 54 bne,pt %icc, 1b 55 prefetch [%o1 + 0x200], #n_reads_strong 56 retl 57 membar #StoreLoad | #StoreStore 58 .size NG4copy_user_page,.-NG4copy_user_page
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