projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 092bd143 MZ |
1 | /* |
| 2 | * Copyright (C) 2012,2013 - ARM Ltd | |
| 3 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License, version 2, as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/linkage.h> | |
| 19 | ||
| 20 | #include <asm/assembler.h> | |
| 21 | #include <asm/kvm_arm.h> | |
| 22 | #include <asm/kvm_mmu.h> | |
| 23 | ||
| 24 | .text | |
| 25 | .pushsection .hyp.idmap.text, "ax" | |
| 26 | ||
| 27 | .align 11 | |
| 28 | ||
| 29 | ENTRY(__kvm_hyp_init) | |
| 30 | ventry __invalid // Synchronous EL2t | |
| 31 | ventry __invalid // IRQ EL2t | |
| 32 | ventry __invalid // FIQ EL2t | |
| 33 | ventry __invalid // Error EL2t | |
| 34 | ||
| 35 | ventry __invalid // Synchronous EL2h | |
| 36 | ventry __invalid // IRQ EL2h | |
| 37 | ventry __invalid // FIQ EL2h | |
| 38 | ventry __invalid // Error EL2h | |
| 39 | ||
| 40 | ventry __do_hyp_init // Synchronous 64-bit EL1 | |
| 41 | ventry __invalid // IRQ 64-bit EL1 | |
| 42 | ventry __invalid // FIQ 64-bit EL1 | |
| 43 | ventry __invalid // Error 64-bit EL1 | |
| 44 | ||
| 45 | ventry __invalid // Synchronous 32-bit EL1 | |
| 46 | ventry __invalid // IRQ 32-bit EL1 | |
| 47 | ventry __invalid // FIQ 32-bit EL1 | |
| 48 | ventry __invalid // Error 32-bit EL1 | |
| 49 | ||
| 50 | __invalid: | |
| 51 | b . | |
| 52 | ||
| 53 | /* | |
| 54 | * x0: HYP boot pgd | |
| 55 | * x1: HYP pgd | |
| 56 | * x2: HYP stack | |
| 57 | * x3: HYP vectors | |
| 58 | */ | |
| 59 | __do_hyp_init: | |
| 60 | ||
| 61 | msr ttbr0_el2, x0 | |
| 62 | ||
| 63 | mrs x4, tcr_el1 | |
| 64 | ldr x5, =TCR_EL2_MASK | |
| 65 | and x4, x4, x5 | |
| 66 | ldr x5, =TCR_EL2_FLAGS | |
| 67 | orr x4, x4, x5 | |
| 68 | msr tcr_el2, x4 | |
| 69 | ||
| 70 | ldr x4, =VTCR_EL2_FLAGS | |
| 87366d8c RMC |
71 | /* |
| 72 | * Read the PARange bits from ID_AA64MMFR0_EL1 and set the PS bits in | |
| 73 | * VTCR_EL2. | |
| 74 | */ | |
| 75 | mrs x5, ID_AA64MMFR0_EL1 | |
| 76 | bfi x4, x5, #16, #3 | |
| 092bd143 MZ |
77 | msr vtcr_el2, x4 |
| 78 | ||
| 79 | mrs x4, mair_el1 | |
| 80 | msr mair_el2, x4 | |
| 81 | isb | |
| 82 | ||
| 18ea3dbc MZ |
83 | mrs x4, sctlr_el2 |
| 84 | and x4, x4, #SCTLR_EL2_EE // preserve endianness of EL2 | |
| 85 | ldr x5, =SCTLR_EL2_FLAGS | |
| 86 | orr x4, x4, x5 | |
| 092bd143 MZ |
87 | msr sctlr_el2, x4 |
| 88 | isb | |
| 89 | ||
| 90 | /* MMU is now enabled. Get ready for the trampoline dance */ | |
| 91 | ldr x4, =TRAMPOLINE_VA | |
| 92 | adr x5, target | |
| 93 | bfi x4, x5, #0, #PAGE_SHIFT | |
| 94 | br x4 | |
| 95 | ||
| 96 | target: /* We're now in the trampoline code, switch page tables */ | |
| 97 | msr ttbr0_el2, x1 | |
| 98 | isb | |
| 99 | ||
| 100 | /* Invalidate the old TLBs */ | |
| 101 | tlbi alle2 | |
| 102 | dsb sy | |
| 103 | ||
| 104 | /* Set the stack and new vectors */ | |
| 105 | kern_hyp_va x2 | |
| 106 | mov sp, x2 | |
| 107 | kern_hyp_va x3 | |
| 108 | msr vbar_el2, x3 | |
| 109 | ||
| 110 | /* Hello, World! */ | |
| 111 | eret | |
| 112 | ENDPROC(__kvm_hyp_init) | |
| 113 | ||
| 114 | .ltorg | |
| 115 | ||
| 116 | .popsection |