| 46,6 → 46,42 |
|---|
| #include <panic.h> |
| #include <interrupt.h> |
| |
| /** Disable I/O on non-privileged levels |
| * |
| * Clean IOPL(12,13) and NT(14) flags in EFLAGS register |
| */ |
| static void clean_IOPL_NT_flags(void) |
| { |
| asm |
| ( |
| "pushfq;" |
| "pop %%rax;" |
| "and $~(0x7000),%%rax;" |
| "pushq %%rax;" |
| "popfq;" |
| : |
| : |
| :"%rax" |
| ); |
| } |
| |
| /** Disable alignment check |
| * |
| * Clean AM(18) flag in CR0 register |
| */ |
| static void clean_AM_flag(void) |
| { |
| asm |
| ( |
| "mov %%cr0,%%rax;" |
| "and $~(0x40000),%%rax;" |
| "mov %%rax,%%cr0;" |
| : |
| : |
| :"%rax" |
| ); |
| } |
| |
| void arch_pre_mm_init(void) |
| { |
| struct cpu_info cpuid_s; |
| 63,18 → 99,26 |
|---|
| |
| /* Enable No-execute pages */ |
| set_efer_flag(AMD_NXE_FLAG); |
| /* Enable SYSCALL/SYSRET */ |
| set_efer_flag(AMD_SCE_FLAG); |
| /* Enable FPU */ |
| cpu_setup_fpu(); |
| |
| /* Initialize segmentation */ |
| pm_init(); |
| |
| /* Disable I/O on nonprivileged levels |
| * clear the NT(nested-thread) flag |
| */ |
| clean_IOPL_NT_flags(); |
| /* Disable alignment check */ |
| clean_AM_flag(); |
| |
| |
| if (config.cpu_active == 1) { |
| bios_init(); |
| i8259_init(); /* PIC */ |
| i8254_init(); /* hard clock */ |
| |
| exc_register(VECTOR_SYSCALL, "syscall", syscall); |
| |
| #ifdef CONFIG_SMP |
| exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown", |
| tlb_shootdown_ipi); |