projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 749cf76c CD |
1 | /* |
| 2 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University | |
| 3 | * Author: Christoffer Dall <c.dall@virtualopensystems.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, write to the Free Software | |
| 16 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
| 17 | */ | |
| 18 | #include <linux/compiler.h> | |
| 19 | #include <linux/errno.h> | |
| 20 | #include <linux/sched.h> | |
| 21 | #include <linux/kvm_host.h> | |
| 22 | #include <linux/kvm.h> | |
| 23 | ||
| 24 | #include <asm/unified.h> | |
| 25 | #include <asm/ptrace.h> | |
| 26 | #include <asm/cputype.h> | |
| 27 | #include <asm/kvm_arm.h> | |
| 28 | #include <asm/kvm_coproc.h> | |
| 29 | ||
| 5ae7f87a AP |
30 | #include <kvm/arm_arch_timer.h> |
| 31 | ||
| 749cf76c | 32 | /****************************************************************************** |
| e8c2d99f | 33 | * Cortex-A15 and Cortex-A7 Reset Values |
| 749cf76c CD |
34 | */ |
| 35 | ||
| e8c2d99f | 36 | static struct kvm_regs cortexa_regs_reset = { |
| 749cf76c CD |
37 | .usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT, |
| 38 | }; | |
| 39 | ||
| e8c2d99f | 40 | static const struct kvm_irq_level cortexa_vtimer_irq = { |
| 6833d838 | 41 | { .irq = 27 }, |
| 5ae7f87a AP |
42 | .level = 1, |
| 43 | }; | |
| 44 | ||
| 749cf76c CD |
45 | |
| 46 | /******************************************************************************* | |
| 47 | * Exported reset function | |
| 48 | */ | |
| 49 | ||
| 50 | /** | |
| 51 | * kvm_reset_vcpu - sets core registers and cp15 registers to reset value | |
| 52 | * @vcpu: The VCPU pointer | |
| 53 | * | |
| 54 | * This function finds the right table above and sets the registers on the | |
| 55 | * virtual CPU struct to their architectually defined reset values. | |
| 56 | */ | |
| 57 | int kvm_reset_vcpu(struct kvm_vcpu *vcpu) | |
| 58 | { | |
| ac570e04 | 59 | struct kvm_regs *reset_regs; |
| 5ae7f87a | 60 | const struct kvm_irq_level *cpu_vtimer_irq; |
| 749cf76c CD |
61 | |
| 62 | switch (vcpu->arch.target) { | |
| e8c2d99f | 63 | case KVM_ARM_TARGET_CORTEX_A7: |
| 749cf76c | 64 | case KVM_ARM_TARGET_CORTEX_A15: |
| 13acfd57 | 65 | reset_regs = &cortexa_regs_reset; |
| 749cf76c | 66 | vcpu->arch.midr = read_cpuid_id(); |
| e8c2d99f | 67 | cpu_vtimer_irq = &cortexa_vtimer_irq; |
| 749cf76c CD |
68 | break; |
| 69 | default: | |
| 70 | return -ENODEV; | |
| 71 | } | |
| 72 | ||
| 73 | /* Reset core registers */ | |
| ac570e04 | 74 | memcpy(&vcpu->arch.regs, reset_regs, sizeof(vcpu->arch.regs)); |
| 749cf76c CD |
75 | |
| 76 | /* Reset CP15 registers */ | |
| 77 | kvm_reset_coprocs(vcpu); | |
| 78 | ||
| 5ae7f87a | 79 | /* Reset arch_timer context */ |
| f120cd65 | 80 | return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq); |
| 749cf76c | 81 | } |