pmap_vfp.S revision 1.6
1 /*- 2 * Copyright (c) 2012 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas of 3am Software Foundry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "opt_cputypes.h" 31 32 #include <machine/asm.h> 33 #include "assym.h" 34 35 RCSID("$NetBSD: pmap_vfp.S,v 1.6 2012/12/31 01:19:36 matt Exp $") 36 37 /* 38 * This zeroes a page 64-bytes at a time. 64 was chosen over 32 since 39 * 64 is the cache line size of the Cortex-A8. 40 */ 41 /* LINTSTUB: void bzero_page_vfp(vaddr_t); */ 42 ENTRY(bzero_page_vfp) 43 push {r0, lr} 44 bl _C_LABEL(vfp_kernel_acquire) 45 pop {r0, lr} 46 #if (CPU_CORTEX == 0) 47 mov ip, #0 48 vmov s0, ip 49 vmov s1, ip 50 vmov.f64 d1, d0 51 vmov.f64 d2, d0 52 vmov.f64 d3, d0 53 vmov.f64 d4, d0 54 vmov.f64 d5, d0 55 vmov.f64 d6, d0 56 vmov.f64 d7, d0 57 #else 58 veor q0, q0, q0 59 veor q1, q1, q1 60 veor q2, q2, q2 61 veor q3, q3, q3 62 #endif 63 add r2, r0, #PAGE_SIZE 64 1: vstmia r0!, {d0-d7} 65 vstmia r0!, {d0-d7} 66 vstmia r0!, {d0-d7} 67 vstmia r0!, {d0-d7} 68 cmp r0, r2 69 blt 1b 70 b _C_LABEL(vfp_kernel_release) /* tailcall the vfp release */ 71 END(bzero_page_vfp) 72 73 /* 74 * This copies a page 64-bytes at a time. 64 was chosen over 32 since 75 * 64 is the cache line size of the Cortex-A8. 76 */ 77 /* LINTSTUB: void bcopy_page_vfp(vaddr_t, vaddr_t); */ 78 ENTRY(bcopy_page_vfp) 79 #ifdef _ARM_ARCH_DWORD_OK 80 pld [r0] @ preload the first 128 bytes 81 pld [r0, #32] 82 pld [r0, #64] 83 pld [r0, #96] 84 #endif 85 str lr, [sp, #-8]! 86 push {r0, r1} 87 bl _C_LABEL(vfp_kernel_acquire) 88 pop {r0, r1} 89 ldr lr, [sp], #8 /* fetch LR */ 90 add r2, r0, #PAGE_SIZE-128 91 1: 92 #ifdef _ARM_ARCH_DWORD_OK 93 pld [r0, #128] @ preload the next 128 94 pld [r0, #160] 95 pld [r0, #192] 96 pld [r0, #224] 97 #endif 98 2: vldmia r0!, {d0-d7} @ read 0-63 99 vstmia r1!, {d0-d7} @ write 0-63 100 vldmia r0!, {d0-d7} @ read 64-127 101 vstmia r1!, {d0-d7} @ write 64-127 102 cmp r0, r2 103 blt 1b 104 beq 2b 105 b _C_LABEL(vfp_kernel_release) /* tailcall the vfp release */ 106 END(bcopy_page_vfp) 107
Indexes created Tue Sep 23 14:10:03 GMT 2025