1/* 2 * Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30#ifndef __ASM_MACROS_COMMON_S__ 31#define __ASM_MACROS_COMMON_S__ 32 33#include <arch.h> 34 35 /* 36 * This macro is used to create a function label and place the 37 * code into a separate text section based on the function name 38 * to enable elimination of unused code during linking 39 */ 40 .macro func _name 41 .section .text.\_name, "ax" 42 .type \_name, %function 43 .func \_name 44 \_name: 45 .endm 46 47 /* 48 * This macro is used to mark the end of a function. 49 */ 50 .macro endfunc _name 51 .endfunc 52 .size \_name, . - \_name 53 .endm 54 55 /* 56 * Theses macros are used to create function labels for deprecated 57 * APIs. If ERROR_DEPRECATED is non zero, the callers of these APIs 58 * will fail to link and cause build failure. 59 */ 60#if ERROR_DEPRECATED 61 .macro func_deprecated _name 62 func deprecated\_name 63 .endm 64 65 .macro endfunc_deprecated _name 66 endfunc deprecated\_name 67 .endm 68#else 69 .macro func_deprecated _name 70 func \_name 71 .endm 72 73 .macro endfunc_deprecated _name 74 endfunc \_name 75 .endm 76#endif 77 78 /* 79 * Helper assembler macro to count trailing zeros. The output is 80 * populated in the `TZ_COUNT` symbol. 81 */ 82 .macro count_tz _value, _tz_count 83 .if \_value 84 count_tz "(\_value >> 1)", "(\_tz_count + 1)" 85 .else 86 .equ TZ_COUNT, (\_tz_count - 1) 87 .endif 88 .endm 89 90 /* 91 * This macro declares an array of 1 or more stacks, properly 92 * aligned and in the requested section 93 */ 94#define DEFAULT_STACK_ALIGN (1 << 6) /* In case the caller doesnt provide alignment */ 95 96 .macro declare_stack _name, _section, _size, _count, _align=DEFAULT_STACK_ALIGN 97 count_tz \_align, 0 98 .if (\_align - (1 << TZ_COUNT)) 99 .error "Incorrect stack alignment specified (Must be a power of 2)." 100 .endif 101 .if ((\_size & ((1 << TZ_COUNT) - 1)) <> 0) 102 .error "Stack size not correctly aligned" 103 .endif 104 .section \_section, "aw", %nobits 105 .align TZ_COUNT 106 \_name: 107 .space ((\_count) * (\_size)), 0 108 .endm 109 110 111#endif /* __ASM_MACROS_COMMON_S__ */ 112