47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
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#ifndef JOS_INC_CPU_H
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#define JOS_INC_CPU_H
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#include <inc/types.h>
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#include <inc/memlayout.h>
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#include <inc/mmu.h>
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#include <inc/env.h>
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// Maximum number of CPUs
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#define NCPU 8
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// Values of status in struct Cpu
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enum {
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CPU_UNUSED = 0,
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CPU_STARTED,
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CPU_HALTED,
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};
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// Per-CPU state
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struct CpuInfo {
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uint8_t cpu_id; // Local APIC ID; index into cpus[] below
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volatile unsigned cpu_status; // The status of the CPU
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struct Env *cpu_env; // The currently-running environment.
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struct Taskstate cpu_ts; // Used by x86 to find stack for interrupt
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};
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// Initialized in mpconfig.c
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extern struct CpuInfo cpus[NCPU];
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extern int ncpu; // Total number of CPUs in the system
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extern struct CpuInfo *bootcpu; // The boot-strap processor (BSP)
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extern physaddr_t lapicaddr; // Physical MMIO address of the local APIC
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// Per-CPU kernel stacks
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extern unsigned char percpu_kstacks[NCPU][KSTKSIZE];
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int cpunum(void);
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#define thiscpu (&cpus[cpunum()])
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void mp_init(void);
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void lapic_init(void);
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void lapic_startap(uint8_t apicid, uint32_t addr);
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void lapic_eoi(void);
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void lapic_ipi(int vector);
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#endif
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