| 0,0 → 1,64 |
|---|
| /* |
| * Copyright (C) 2005 Ondrej Palkovsky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <userspace.h> |
| #include <arch/pm.h> |
| #include <arch/types.h> |
| #include <arch.h> |
| #include <proc/thread.h> |
| #include <mm/vm.h> |
| |
| |
| /** Enter userspace |
| * |
| * Change CPU protection level to 3, enter userspace. |
| * |
| */ |
| void userspace(void) |
| { |
| pri_t pri; |
| |
| pri = cpu_priority_high(); |
| |
| __asm__ volatile ("" |
| "movq %0, %%rax;" |
| "movq %1, %%rbx;" |
| "movq %2, %%rcx;" |
| "movq %3, %%rdx;" |
| "movq %4, %%rsi;" |
| "pushq %%rax;" |
| "pushq %%rbx;" |
| "pushq %%rcx;" |
| "pushq %%rdx;" |
| "pushq %%rsi;" |
| "iretq;" |
| : : "i" (gdtselector(UDATA_DES) | PL_USER), "i" (USTACK_ADDRESS+(THREAD_STACK_SIZE-1)), "r" (pri), "i" (gdtselector(UTEXT_DES) | PL_USER), "i" (UTEXT_ADDRESS)); |
| |
| /* Unreachable */ |
| for(;;); |
| } |