| Current Path : /sys/boot/powerpc/uboot/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/boot/powerpc/uboot/start.S |
/*- * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. * * $FreeBSD: release/9.1.0/sys/boot/powerpc/uboot/start.S 182726 2008-09-03 16:38:27Z raj $ */ #include <machine/asm.h> /* * Entry point to the loader that U-Boot passes control to. */ .text .globl _start _start: /* Hint where to look for the API signature */ lis %r11, uboot_address@ha addi %r11, %r11, uboot_address@l stw %r1, 0(%r11) /* Save U-Boot's r14 */ lis %r11, saved_regs@ha addi %r11, %r11, saved_regs@l stw %r14, 0(%r11) /* Disable interrupts */ mfmsr %r11 andi. %r11, %r11, ~0x8000@l mtmsr %r11 b main /* * syscall() */ ENTRY(syscall) stwu %r1, -16(%r1) mflr %r0 stw %r14, 8(%r1) stw %r0, 20(%r1) /* Restore U-Boot's r14 */ lis %r11, saved_regs@ha addi %r11, %r11, saved_regs@l lwz %r14, 0(%r11) /* Enable interrupts */ mfmsr %r11 ori %r11, %r11, 0x8000@l mtmsr %r11 /* Call into U-Boot */ lis %r11, syscall_ptr@ha addi %r11, %r11, syscall_ptr@l lwz %r11, 0(%r11) mtctr %r11 bctrl /* Disable interrupts */ mfmsr %r11 andi. %r11, %r11, ~0x8000@l mtmsr %r11 /* Epilogue */ lwz %r11, 0(%r1) lwz %r0, 4(%r11) mtlr %r0 lwz %r14, 8(%r1) mr %r1, %r11 blr /* * Data section */ .data GLOBAL(syscall_ptr) .long 0 GLOBAL(saved_regs) .long 0 /* R14 */ GLOBAL(uboot_address) .long 0