1/* 2 * Copyright (c) 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 __CPU_MACROS_S__ 31#define __CPU_MACROS_S__ 32 33#include <arch.h> 34 35#define CPU_IMPL_PN_MASK (MIDR_IMPL_MASK << MIDR_IMPL_SHIFT) | \ 36 (MIDR_PN_MASK << MIDR_PN_SHIFT) 37 38/* The number of CPU operations allowed */ 39#define CPU_MAX_PWR_DWN_OPS 2 40 41/* Special constant to specify that CPU has no reset function */ 42#define CPU_NO_RESET_FUNC 0 43 44/* Word size for 32-bit CPUs */ 45#define CPU_WORD_SIZE 4 46 47 /* 48 * Define the offsets to the fields in cpu_ops structure. 49 */ 50 .struct 0 51CPU_MIDR: /* cpu_ops midr */ 52 .space 4 53/* Reset fn is needed during reset */ 54#if IMAGE_BL1 || IMAGE_BL32 55CPU_RESET_FUNC: /* cpu_ops reset_func */ 56 .space 4 57#endif 58#if IMAGE_BL32 /* The power down core and cluster is needed only in BL32 */ 59CPU_PWR_DWN_OPS: /* cpu_ops power down functions */ 60 .space (4 * CPU_MAX_PWR_DWN_OPS) 61#endif 62CPU_OPS_SIZE = . 63 64 /* 65 * Write given expressions as words 66 * 67 * _count: 68 * Write at least _count words. If the given number of expressions 69 * is less than _count, repeat the last expression to fill _count 70 * words in total 71 * _rest: 72 * Optional list of expressions. _this is for parameter extraction 73 * only, and has no significance to the caller 74 * 75 * Invoked as: 76 * fill_constants 2, foo, bar, blah, ... 77 */ 78 .macro fill_constants _count:req, _this, _rest:vararg 79 .ifgt \_count 80 /* Write the current expression */ 81 .ifb \_this 82 .error "Nothing to fill" 83 .endif 84 .word \_this 85 86 /* Invoke recursively for remaining expressions */ 87 .ifnb \_rest 88 fill_constants \_count-1, \_rest 89 .else 90 fill_constants \_count-1, \_this 91 .endif 92 .endif 93 .endm 94 95 /* 96 * Declare CPU operations 97 * 98 * _name: 99 * Name of the CPU for which operations are being specified 100 * _midr: 101 * Numeric value expected to read from CPU's MIDR 102 * _resetfunc: 103 * Reset function for the CPU. If there's no CPU reset function, 104 * specify CPU_NO_RESET_FUNC 105 * _power_down_ops: 106 * Comma-separated list of functions to perform power-down 107 * operatios on the CPU. At least one, and up to 108 * CPU_MAX_PWR_DWN_OPS number of functions may be specified. 109 * Starting at power level 0, these functions shall handle power 110 * down at subsequent power levels. If there aren't exactly 111 * CPU_MAX_PWR_DWN_OPS functions, the last specified one will be 112 * used to handle power down at subsequent levels 113 */ 114 .macro declare_cpu_ops _name:req, _midr:req, _resetfunc:req, \ 115 _power_down_ops:vararg 116 .section cpu_ops, "a" 117 .align 2 118 .type cpu_ops_\_name, %object 119 .word \_midr 120#if IMAGE_BL1 || IMAGE_BL32 121 .word \_resetfunc 122#endif 123#if IMAGE_BL32 1241: 125 /* Insert list of functions */ 126 fill_constants CPU_MAX_PWR_DWN_OPS, \_power_down_ops 1272: 128 /* 129 * Error if no or more than CPU_MAX_PWR_DWN_OPS were specified in the 130 * list 131 */ 132 .ifeq 2b - 1b 133 .error "At least one power down function must be specified" 134 .else 135 .iflt 2b - 1b - (CPU_MAX_PWR_DWN_OPS * CPU_WORD_SIZE) 136 .error "More than CPU_MAX_PWR_DWN_OPS functions specified" 137 .endif 138 .endif 139#endif 140 .endm 141 142#endif /* __CPU_MACROS_S__ */ 143