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2d4a65c654
In order to avoid cyclic dependencies in the case of page faults while bringing up an AP, pre-allocate the cpu_data structure and related CPU control structures, and pass them to the AP startup code. This also changes the following: - cpu_early_init() was split out of cpu_early_init() to allow early usage of current_cpu() on the BSP before we're ready for the rest of cpu_init(). (These functions were also renamed to follow the preferred area_action naming style.) - isr_handler now zeroes out the IST entry for its vector instead of trying to increment the IST stack pointer - the IST stacks are allocated outside of cpu_init, to also help reduce stack pressue and chance of page faults before APs are ready - share stack areas between AP idle threads so we only waste 1K per additional AP for the unused idle stack
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
#pragma once
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#include <stdint.h>
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#include "kutil/spinlock.h"
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class GDT;
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class process;
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struct TCB;
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class thread;
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class TSS;
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struct cpu_state
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{
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uint64_t r15, r14, r13, r12, r11, r10, r9, r8;
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uint64_t rdi, rsi, rbp, rbx, rdx, rcx, rax;
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uint64_t interrupt, errorcode;
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uint64_t rip, cs, rflags, user_rsp, ss;
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};
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/// Per-cpu state data. If you change this, remember to update the assembly
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/// version in 'tasking.inc'
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struct cpu_data
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{
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cpu_data *self;
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uint64_t id;
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uintptr_t rsp0;
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uintptr_t rsp3;
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TCB *tcb;
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thread *thread;
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process *process;
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TSS *tss;
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GDT *gdt;
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// Values from here on don't need to be in the asm version
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kutil::spinlock::node spinner;
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};
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extern "C" cpu_data * _current_gsbase();
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/// Set up the running CPU. This sets GDT, IDT, and necessary MSRs as well as creating
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/// the cpu_data structure for this processor.
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/// \arg cpu The cpu_data structure for this CPU
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/// \arg bsp True if this CPU is the BSP
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void cpu_init(cpu_data *cpu, bool bsp);
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/// Do early (before cpu_init) initialization work. Only needs to be called manually for
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/// the BSP, otherwise cpu_init will call it.
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/// \arg cpu The cpu_data structure for this CPU
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void cpu_early_init(cpu_data *cpu);
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/// Get the cpu_data struct for the current executing CPU
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inline cpu_data & current_cpu() { return *_current_gsbase(); }
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/// Validate the required CPU features are present. Really, the bootloader already
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/// validated the required features, but still iterate the options and log about them.
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void cpu_validate();
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