projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 8ee28251 AB |
1 | /* |
| 2 | * Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * SPDX-License-Identifier: GPL-2.0+ | |
| 5 | */ | |
| 6 | ||
| 7 | #include <linux/linkage.h> | |
| 8 | ||
| 9 | /* | |
| 10 | * Note on the LD/ST addressing modes with address register write-back | |
| 11 | * | |
| 12 | * LD.a same as LD.aw | |
| 13 | * | |
| 14 | * LD.a reg1, [reg2, x] => Pre Incr | |
| 15 | * Eff Addr for load = [reg2 + x] | |
| 16 | * | |
| 17 | * LD.ab reg1, [reg2, x] => Post Incr | |
| 18 | * Eff Addr for load = [reg2] | |
| 19 | */ | |
| 20 | ||
| 21 | .macro PUSH reg | |
| 22 | st.a \reg, [%sp, -4] | |
| 23 | .endm | |
| 24 | ||
| 25 | .macro PUSHAX aux | |
| 26 | lr %r9, [\aux] | |
| 27 | PUSH %r9 | |
| 28 | .endm | |
| 29 | ||
| 30 | .macro SAVE_R1_TO_R24 | |
| 31 | PUSH %r1 | |
| 32 | PUSH %r2 | |
| 33 | PUSH %r3 | |
| 34 | PUSH %r4 | |
| 35 | PUSH %r5 | |
| 36 | PUSH %r6 | |
| 37 | PUSH %r7 | |
| 38 | PUSH %r8 | |
| 39 | PUSH %r9 | |
| 40 | PUSH %r10 | |
| 41 | PUSH %r11 | |
| 42 | PUSH %r12 | |
| 43 | PUSH %r13 | |
| 44 | PUSH %r14 | |
| 45 | PUSH %r15 | |
| 46 | PUSH %r16 | |
| 47 | PUSH %r17 | |
| 48 | PUSH %r18 | |
| 49 | PUSH %r19 | |
| 50 | PUSH %r20 | |
| 51 | PUSH %r21 | |
| 52 | PUSH %r22 | |
| 53 | PUSH %r23 | |
| 54 | PUSH %r24 | |
| 55 | .endm | |
| 56 | ||
| 57 | .macro SAVE_ALL_SYS | |
| 58 | /* saving %r0 to reg->r0 in advance since we read %ecr into it */ | |
| 59 | st %r0, [%sp, -8] | |
| 60 | lr %r0, [%ecr] /* all stack addressing is manual so far */ | |
| 61 | st %r0, [%sp] | |
| 62 | st %sp, [%sp, -4] | |
| 63 | /* now move %sp to reg->r0 position so we can do "push" automatically */ | |
| 64 | sub %sp, %sp, 8 | |
| 65 | ||
| 66 | SAVE_R1_TO_R24 | |
| 67 | PUSH %r25 | |
| 68 | PUSH %gp | |
| 69 | PUSH %fp | |
| 70 | PUSH %blink | |
| 71 | PUSHAX %eret | |
| 72 | PUSHAX %erstatus | |
| 73 | PUSH %lp_count | |
| 74 | PUSHAX %lp_end | |
| 75 | PUSHAX %lp_start | |
| 76 | PUSHAX %erbta | |
| 77 | .endm | |
| 78 | ||
| 79 | .macro SAVE_EXCEPTION_SOURCE | |
| 80 | #ifdef CONFIG_MMU | |
| 81 | /* If MMU exists exception faulting address is loaded in EFA reg */ | |
| 82 | lr %r0, [%efa] | |
| 83 | #else | |
| 84 | /* Otherwise in ERET (exception return) reg */ | |
| 85 | lr %r0, [%eret] | |
| 86 | #endif | |
| 87 | .endm | |
| 88 | ||
| 89 | ENTRY(memory_error) | |
| 90 | SAVE_ALL_SYS | |
| 91 | SAVE_EXCEPTION_SOURCE | |
| 92 | mov %r1, %sp | |
| 93 | j do_memory_error | |
| 94 | ENDPROC(memory_error) | |
| 95 | ||
| 96 | ENTRY(instruction_error) | |
| 97 | SAVE_ALL_SYS | |
| 98 | SAVE_EXCEPTION_SOURCE | |
| 99 | mov %r1, %sp | |
| 100 | j do_instruction_error | |
| 101 | ENDPROC(instruction_error) | |
| 102 | ||
| 103 | ENTRY(interrupt_handler) | |
| 104 | /* Todo - save and restore CPU context when interrupts will be in use */ | |
| 105 | bl do_interrupt_handler | |
| 106 | rtie | |
| 107 | ENDPROC(interrupt_handler) | |
| 108 | ||
| 109 | ENTRY(EV_MachineCheck) | |
| 110 | SAVE_ALL_SYS | |
| 111 | SAVE_EXCEPTION_SOURCE | |
| 112 | mov %r1, %sp | |
| 113 | j do_machine_check_fault | |
| 114 | ENDPROC(EV_MachineCheck) | |
| 115 | ||
| 116 | ENTRY(EV_TLBMissI) | |
| 117 | SAVE_ALL_SYS | |
| 118 | mov %r0, %sp | |
| 119 | j do_itlb_miss | |
| 120 | ENDPROC(EV_TLBMissI) | |
| 121 | ||
| 122 | ENTRY(EV_TLBMissD) | |
| 123 | SAVE_ALL_SYS | |
| 124 | mov %r0, %sp | |
| 125 | j do_dtlb_miss | |
| 126 | ENDPROC(EV_TLBMissD) | |
| 127 | ||
| 128 | ENTRY(EV_TLBProtV) | |
| 129 | SAVE_ALL_SYS | |
| 130 | SAVE_EXCEPTION_SOURCE | |
| 131 | mov %r1, %sp | |
| 132 | j do_tlb_prot_violation | |
| 133 | ENDPROC(EV_TLBProtV) | |
| 134 | ||
| 135 | ENTRY(EV_PrivilegeV) | |
| 136 | SAVE_ALL_SYS | |
| 137 | mov %r0, %sp | |
| 138 | j do_privilege_violation | |
| 139 | ENDPROC(EV_PrivilegeV) | |
| 140 | ||
| 141 | ENTRY(EV_Trap) | |
| 142 | SAVE_ALL_SYS | |
| 143 | mov %r0, %sp | |
| 144 | j do_trap | |
| 145 | ENDPROC(EV_Trap) | |
| 146 | ||
| 147 | ENTRY(EV_Extension) | |
| 148 | SAVE_ALL_SYS | |
| 149 | mov %r0, %sp | |
| 150 | j do_extension | |
| 151 | ENDPROC(EV_Extension) | |
| 699c4e59 AB |
152 | |
| 153 | #ifdef CONFIG_ISA_ARCV2 | |
| 154 | ENTRY(EV_SWI) | |
| 155 | SAVE_ALL_SYS | |
| 156 | mov %r0, %sp | |
| 157 | j do_swi | |
| 158 | ENDPROC(EV_SWI) | |
| 159 | ||
| 160 | ENTRY(EV_DivZero) | |
| 161 | SAVE_ALL_SYS | |
| 162 | SAVE_EXCEPTION_SOURCE | |
| 163 | mov %r1, %sp | |
| 164 | j do_divzero | |
| 165 | ENDPROC(EV_DivZero) | |
| 166 | ||
| 167 | ENTRY(EV_DCError) | |
| 168 | SAVE_ALL_SYS | |
| 169 | mov %r0, %sp | |
| 170 | j do_dcerror | |
| 171 | ENDPROC(EV_DCError) | |
| 172 | ||
| 173 | ENTRY(EV_Maligned) | |
| 174 | SAVE_ALL_SYS | |
| 175 | SAVE_EXCEPTION_SOURCE | |
| 176 | mov %r1, %sp | |
| 177 | j do_maligned | |
| 178 | ENDPROC(EV_Maligned) | |
| 179 | #endif |