Mark
51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
#pragma once
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#if defined(__ASM__)
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.extern cpu
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#if defined(AMD64_SMP)
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#define get_cpu(off) \
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%gs:off
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#else
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#define get_cpu(off) \
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(__amd64_cpu + off)(%rip)
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#endif
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// To be used in interrupt handlers
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// DIRECTLY AFTER ENTRY without prior stack modification
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.macro swapgs_if_needed
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cmpq $0x08, 0x08(%rsp)
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je 1f
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swapgs
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1:
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.endm
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#define CPU_SELF 0x00
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#define CPU_THREAD 0x08
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#define CPU_TSS 0x10
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#define CPU_SYSCALL_RSP 0x18
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#define CPU_ID 0x28
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#define TSS_RSP0 0x04
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#else
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#include "sys/types.h"
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struct cpu {
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// TODO: somehow export offsets to asm
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struct cpu *self; // 0x00
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struct thread *thread; // 0x08
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amd64_tss_t *tss; // 0x10
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uint64_t syscall_rsp; // 0x18
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uint64_t ticks; // 0x20
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uint64_t processor_id; // 0x28
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// No need to define offsets for these: ther're not accessed
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// from assembly
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uint64_t flags;
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uint64_t apic_id;
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};
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#endif
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