| Wedson Almeida Filho | 987c0ff | 2018-06-20 16:34:38 +0100 | [diff] [blame^] | 1 | #ifndef _CPU_H |
| 2 | #define _CPU_H |
| 3 | |
| 4 | #include <stdbool.h> |
| 5 | #include <stddef.h> |
| 6 | #include <stdint.h> |
| 7 | |
| 8 | #include "arch_cpu.h" |
| 9 | #include "list.h" |
| 10 | #include "spinlock.h" |
| 11 | |
| 12 | struct vcpu { |
| 13 | struct list_entry links; |
| 14 | bool is_runnable; |
| 15 | bool interrupt; |
| 16 | struct arch_regs regs; |
| 17 | struct cpu *cpu; |
| 18 | struct vm *vm; |
| 19 | }; |
| 20 | |
| 21 | /* TODO: Update alignment such that cpus are in different cache lines. */ |
| 22 | struct cpu { |
| 23 | struct spinlock lock; |
| 24 | |
| 25 | struct vcpu *current; |
| 26 | |
| 27 | struct list_entry ready_queue; |
| 28 | |
| 29 | /* |
| 30 | * Enabling/disabling irqs are counted per-cpu. They are enabled when |
| 31 | * the count is zero, and disabled when it's non-zero. |
| 32 | */ |
| 33 | uint32_t irq_disable_count; |
| 34 | |
| 35 | /* |
| 36 | * The number of VMs that have turned this CPU on. CPUs are off when |
| 37 | * this count is zero, and on when this count is ono-zero. |
| 38 | */ |
| 39 | uint32_t cpu_on_count; |
| 40 | |
| 41 | bool (*timer_cb)(void *context); |
| 42 | void *timer_context; |
| 43 | |
| 44 | /* CPU identifier. Doesn't have to be contiguous. */ |
| 45 | size_t id; |
| 46 | |
| 47 | /* Pointer to bottom of the stack. */ |
| 48 | void *stack_bottom; |
| 49 | }; |
| 50 | |
| 51 | void cpu_init(struct cpu *c); |
| 52 | void cpu_irq_enable(struct cpu *c); |
| 53 | void cpu_irq_disable(struct cpu *c); |
| 54 | void cpu_on(struct cpu *c); |
| 55 | void cpu_off(struct cpu *c); |
| 56 | |
| 57 | void vcpu_init(struct vcpu *vcpu, struct cpu *cpu, struct vm *vm); |
| 58 | void vcpu_ready(struct vcpu *v); |
| 59 | void vcpu_unready(struct vcpu *v); |
| 60 | |
| 61 | #endif /* _CPU_H */ |