| Dimitris Papastamos | 446f7f1 | 2017-11-30 14:53:53 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <asm_macros.S> |
| 9 | #include <context.h> |
| 10 | |
| 11 | .globl workaround_mmu_runtime_exceptions |
| 12 | |
| 13 | vector_base workaround_mmu_runtime_exceptions |
| 14 | |
| 15 | .macro apply_workaround |
| 16 | stp x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0] |
| 17 | mrs x0, sctlr_el3 |
| 18 | /* Disable MMU */ |
| 19 | bic x1, x0, #SCTLR_M_BIT |
| 20 | msr sctlr_el3, x1 |
| 21 | isb |
| 22 | /* Restore MMU config */ |
| 23 | msr sctlr_el3, x0 |
| 24 | isb |
| 25 | ldp x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0] |
| 26 | .endm |
| 27 | |
| 28 | /* --------------------------------------------------------------------- |
| 29 | * Current EL with SP_EL0 : 0x0 - 0x200 |
| 30 | * --------------------------------------------------------------------- |
| 31 | */ |
| 32 | vector_entry workaround_mmu_sync_exception_sp_el0 |
| 33 | b sync_exception_sp_el0 |
| 34 | check_vector_size workaround_mmu_sync_exception_sp_el0 |
| 35 | |
| 36 | vector_entry workaround_mmu_irq_sp_el0 |
| 37 | b irq_sp_el0 |
| 38 | check_vector_size workaround_mmu_irq_sp_el0 |
| 39 | |
| 40 | vector_entry workaround_mmu_fiq_sp_el0 |
| 41 | b fiq_sp_el0 |
| 42 | check_vector_size workaround_mmu_fiq_sp_el0 |
| 43 | |
| 44 | vector_entry workaround_mmu_serror_sp_el0 |
| 45 | b serror_sp_el0 |
| 46 | check_vector_size workaround_mmu_serror_sp_el0 |
| 47 | |
| 48 | /* --------------------------------------------------------------------- |
| 49 | * Current EL with SP_ELx: 0x200 - 0x400 |
| 50 | * --------------------------------------------------------------------- |
| 51 | */ |
| 52 | vector_entry workaround_mmu_sync_exception_sp_elx |
| 53 | b sync_exception_sp_elx |
| 54 | check_vector_size workaround_mmu_sync_exception_sp_elx |
| 55 | |
| 56 | vector_entry workaround_mmu_irq_sp_elx |
| 57 | b irq_sp_elx |
| 58 | check_vector_size workaround_mmu_irq_sp_elx |
| 59 | |
| 60 | vector_entry workaround_mmu_fiq_sp_elx |
| 61 | b fiq_sp_elx |
| 62 | check_vector_size workaround_mmu_fiq_sp_elx |
| 63 | |
| 64 | vector_entry workaround_mmu_serror_sp_elx |
| 65 | b serror_sp_elx |
| 66 | check_vector_size workaround_mmu_serror_sp_elx |
| 67 | |
| 68 | /* --------------------------------------------------------------------- |
| 69 | * Lower EL using AArch64 : 0x400 - 0x600 |
| 70 | * --------------------------------------------------------------------- |
| 71 | */ |
| 72 | vector_entry workaround_mmu_sync_exception_aarch64 |
| 73 | apply_workaround |
| 74 | b sync_exception_aarch64 |
| 75 | check_vector_size workaround_mmu_sync_exception_aarch64 |
| 76 | |
| 77 | vector_entry workaround_mmu_irq_aarch64 |
| 78 | apply_workaround |
| 79 | b irq_aarch64 |
| 80 | check_vector_size workaround_mmu_irq_aarch64 |
| 81 | |
| 82 | vector_entry workaround_mmu_fiq_aarch64 |
| 83 | apply_workaround |
| 84 | b fiq_aarch64 |
| 85 | check_vector_size workaround_mmu_fiq_aarch64 |
| 86 | |
| 87 | vector_entry workaround_mmu_serror_aarch64 |
| 88 | apply_workaround |
| 89 | b serror_aarch64 |
| 90 | check_vector_size workaround_mmu_serror_aarch64 |
| 91 | |
| 92 | /* --------------------------------------------------------------------- |
| 93 | * Lower EL using AArch32 : 0x600 - 0x800 |
| 94 | * --------------------------------------------------------------------- |
| 95 | */ |
| 96 | vector_entry workaround_mmu_sync_exception_aarch32 |
| 97 | apply_workaround |
| 98 | b sync_exception_aarch32 |
| 99 | check_vector_size workaround_mmu_sync_exception_aarch32 |
| 100 | |
| 101 | vector_entry workaround_mmu_irq_aarch32 |
| 102 | apply_workaround |
| 103 | b irq_aarch32 |
| 104 | check_vector_size workaround_mmu_irq_aarch32 |
| 105 | |
| 106 | vector_entry workaround_mmu_fiq_aarch32 |
| 107 | apply_workaround |
| 108 | b fiq_aarch32 |
| 109 | check_vector_size workaround_mmu_fiq_aarch32 |
| 110 | |
| 111 | vector_entry workaround_mmu_serror_aarch32 |
| 112 | apply_workaround |
| 113 | b serror_aarch32 |
| 114 | check_vector_size workaround_mmu_serror_aarch32 |