101 lines
2 KiB
C
101 lines
2 KiB
C
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#include <x86/x86.h>
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#define PML4_ADDR 0x1000
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#define PDPT_ADDR 0x2000
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#define NR_SEG 6 // GDT size
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#define SEG_KCODE 1 // Kernel code
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#define SEG_KDATA 2 // Kernel data/stack
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#define SEG_UCODE 3 // User code
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#define SEG_UDATA 4 // User data/stack
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#define SEG_TSS 5 // Global unique task state segement
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#define NR_IRQ 256 // IDT size
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#ifndef __ASSEMBLER__
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#include <am.h>
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#include <klib-macros.h>
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struct kernel_stack {
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uint8_t stack[8192];
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};
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static inline void *stack_top(struct kernel_stack *stk) {
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return stk->stack + sizeof(stk->stack);
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}
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struct mmu_config {
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int ptlevels, pgsize;
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struct ptinfo {
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const char *name;
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uintptr_t mask;
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int shift, bits;
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} pgtables[];
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};
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struct vm_area {
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Area area;
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int kernel;
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};
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void __am_iret(Context *ctx);
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struct cpu_local {
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AddrSpace *uvm;
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#if __x86_64__
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SegDesc gdt[NR_SEG + 1];
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TSS64 tss;
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#else
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SegDesc gdt[NR_SEG];
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TSS32 tss;
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#endif
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struct kernel_stack stack;
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};
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#if __x86_64__
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struct trap_frame {
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Context saved_context;
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uint64_t irq, errcode;
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uint64_t rip, cs, rflags, rsp, ss;
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};
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#else
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struct trap_frame {
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Context saved_context;
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uint32_t irq, errcode;
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uint32_t eip, cs, eflags, esp, ss;
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};
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#endif
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extern volatile uint32_t *__am_lapic;
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extern int __am_ncpu;
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extern struct cpu_local __am_cpuinfo[MAX_CPU];
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#define CPU (&__am_cpuinfo[cpu_current()])
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#define bug_on(cond) \
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do { \
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if (cond) panic("internal error (likely a bug in AM)"); \
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} while (0)
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#define bug() bug_on(1)
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// apic utils
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void __am_lapic_eoi();
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void __am_ioapic_init();
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void __am_lapic_bootap(uint32_t cpu, void *address);
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void __am_ioapic_enable(int irq, int cpu);
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// x86-specific operations
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void __am_bootcpu_init();
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void __am_percpu_init();
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Area __am_heap_init();
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void __am_lapic_init();
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void __am_othercpu_entry();
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void __am_percpu_initirq();
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void __am_percpu_initgdt();
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void __am_percpu_initlapic();
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void __am_stop_the_world();
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#endif
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