blob: 99ca572f0864333694b184b0c4e6c3abfc161b1c [file] [log] [blame]
/*
* Copyright (c) 2009 Corey Tabaka
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <debug.h>
#include <arch.h>
#include <arch/ops.h>
#include <arch/x86.h>
#include <arch/x86/mmu.h>
#include <arch/x86/descriptor.h>
#include <platform.h>
#include <sys/types.h>
#include <string.h>
static tss_t system_tss;
void arch_early_init(void)
{
x86_mmu_init();
platform_init_mmu_mappings();
/* enable caches here for now */
clear_in_cr0(X86_CR0_NW | X86_CR0_CD);
memset(&system_tss, 0, sizeof(tss_t));
system_tss.esp0 = 0;
system_tss.ss0 = DATA_SELECTOR;
system_tss.ss1 = 0;
system_tss.ss2 = 0;
system_tss.eflags = 0x00003002;
system_tss.bitmap = offsetof(tss_t, tss_bitmap);
system_tss.trace = 1; // trap on hardware task switch
set_global_desc(TSS_SELECTOR, &system_tss, sizeof(tss_t), 1, 0, 0, SEG_TYPE_TSS, 0, 0);
x86_ltr(TSS_SELECTOR);
}
void arch_init(void)
{
}