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206 palkovsky 1 
/*
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 * Copyright (C) 2005 Ondrej Palkovsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <arch.h>
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#include <arch/types.h>
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#include <config.h>
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#include <arch/ega.h>
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#include <arch/i8042.h>
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#include <arch/i8254.h>
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#include <arch/i8259.h>
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#include <arch/bios/bios.h>
242 palkovsky 41 
#include <arch/mm/memory_init.h>
251 palkovsky 42 
#include <arch/cpu.h>
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#include <print.h>
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#include <arch/cpuid.h>
452 decky 45 
#include <genarch/acpi/acpi.h>
282 palkovsky 46 
#include <panic.h>
576 palkovsky 47 
#include <interrupt.h>
803 palkovsky 48 
#include <arch/syscall.h>
206 palkovsky 49 
 
799 palkovsky 50 
/** Disable I/O on non-privileged levels
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 *
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 * Clean IOPL(12,13) and NT(14) flags in EFLAGS register
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 */
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static void clean_IOPL_NT_flags(void)
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{
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    asm
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    (
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        "pushfq;"
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        "pop %%rax;"
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        "and $~(0x7000),%%rax;"
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        "pushq %%rax;"
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        "popfq;"
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        :
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        :
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        :"%rax"
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    );
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}
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/** Disable alignment check
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 *
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 * Clean AM(18) flag in CR0 register
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 */
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static void clean_AM_flag(void)
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{
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    asm
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    (
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        "mov %%cr0,%%rax;"
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        "and $~(0x40000),%%rax;"
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        "mov %%rax,%%cr0;"
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        :
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        :
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        :"%rax"
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    );
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}
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206 palkovsky 86 
void arch_pre_mm_init(void)
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{
251 palkovsky 88 
    struct cpu_info cpuid_s;
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    cpuid(AMD_CPUID_EXTENDED,&cpuid_s);
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    if (! (cpuid_s.cpuid_edx & (1<<AMD_EXT_NOEXECUTE)))
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        panic("Processor does not support No-execute pages.\n");
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    cpuid(INTEL_CPUID_STANDARD,&cpuid_s);
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    if (! (cpuid_s.cpuid_edx & (1<<INTEL_FXSAVE)))
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        panic("Processor does not support FXSAVE/FXRESTORE.\n");
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    if (! (cpuid_s.cpuid_edx & (1<<INTEL_SSE2)))
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        panic("Processor does not support SSE2 instructions.\n");
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    /* Enable No-execute pages */
251 palkovsky 102 
    set_efer_flag(AMD_NXE_FLAG);
282 palkovsky 103 
    /* Enable FPU */
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    cpu_setup_fpu();
803 palkovsky 105 
 
799 palkovsky 106 
    /* Initialize segmentation */
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    pm_init();
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799 palkovsky 109 
        /* Disable I/O on nonprivileged levels
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     * clear the NT(nested-thread) flag
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     */
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    clean_IOPL_NT_flags();
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    /* Disable alignment check */
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    clean_AM_flag();
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206 palkovsky 116 
    if (config.cpu_active == 1) {
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        bios_init();
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        i8259_init();   /* PIC */
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        i8254_init();   /* hard clock */
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458 decky 121 
        #ifdef CONFIG_SMP
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        exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
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                 tlb_shootdown_ipi);
458 decky 124 
        #endif /* CONFIG_SMP */
206 palkovsky 125 
    }
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}
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void arch_post_mm_init(void)
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{
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    if (config.cpu_active == 1) {
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        ega_init(); /* video */
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    }
803 palkovsky 133 
    /* Setup fast SYSCALL/SYSRET */
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    syscall_setup_cpu();
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206 palkovsky 136 
}
242 palkovsky 137 
 
503 jermar 138 
void arch_pre_smp_init(void)
242 palkovsky 139 
{
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    if (config.cpu_active == 1) {
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        memory_print_map();
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458 decky 143 
        #ifdef CONFIG_SMP
242 palkovsky 144 
        acpi_init();
458 decky 145 
        #endif /* CONFIG_SMP */
242 palkovsky 146 
    }
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}
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503 jermar 149 
void arch_post_smp_init(void)
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{
512 jermar 151 
        i8042_init();   /* keyboard controller */
503 jermar 152 
}
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242 palkovsky 154 
void calibrate_delay_loop(void)
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{
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    i8254_calibrate_delay_loop();
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    i8254_normal_operation();
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}