1*9dc70af8SWarner Losh/*- 2*9dc70af8SWarner Losh * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com> 3*9dc70af8SWarner Losh * All rights reserved. 4*9dc70af8SWarner Losh * 5*9dc70af8SWarner Losh * Redistribution and use in source and binary forms, with or without 6*9dc70af8SWarner Losh * modification, are permitted provided that the following conditions 7*9dc70af8SWarner Losh * are met: 8*9dc70af8SWarner Losh * 1. Redistributions of source code must retain the above copyright 9*9dc70af8SWarner Losh * notice, this list of conditions and the following disclaimer. 10*9dc70af8SWarner Losh * 2. Redistributions in binary form must reproduce the above copyright 11*9dc70af8SWarner Losh * notice, this list of conditions and the following disclaimer in the 12*9dc70af8SWarner Losh * documentation and/or other materials provided with the distribution. 13*9dc70af8SWarner Losh * 14*9dc70af8SWarner Losh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15*9dc70af8SWarner Losh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16*9dc70af8SWarner Losh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17*9dc70af8SWarner Losh * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18*9dc70af8SWarner Losh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19*9dc70af8SWarner Losh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20*9dc70af8SWarner Losh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21*9dc70af8SWarner Losh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22*9dc70af8SWarner Losh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23*9dc70af8SWarner Losh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24*9dc70af8SWarner Losh * SUCH DAMAGE. 25*9dc70af8SWarner Losh */ 26*9dc70af8SWarner Losh 27*9dc70af8SWarner Losh#include <machine/asm.h> 28*9dc70af8SWarner Losh 29*9dc70af8SWarner Losh/* 30*9dc70af8SWarner Losh * Entry point to the loader that U-Boot passes control to. 31*9dc70af8SWarner Losh */ 32*9dc70af8SWarner Losh .text 33*9dc70af8SWarner Losh .globl _start 34*9dc70af8SWarner Losh_start: 35*9dc70af8SWarner Losh /* Hint where to look for the API signature */ 36*9dc70af8SWarner Losh lis %r11, uboot_address@ha 37*9dc70af8SWarner Losh addi %r11, %r11, uboot_address@l 38*9dc70af8SWarner Losh stw %r1, 0(%r11) 39*9dc70af8SWarner Losh /* Save U-Boot's r14 and r30 */ 40*9dc70af8SWarner Losh lis %r11, saved_regs@ha 41*9dc70af8SWarner Losh addi %r11, %r11, saved_regs@l 42*9dc70af8SWarner Losh stw %r14, 0(%r11) 43*9dc70af8SWarner Losh stw %r30, 4(%r11) 44*9dc70af8SWarner Losh /* Disable interrupts */ 45*9dc70af8SWarner Losh mfmsr %r11 46*9dc70af8SWarner Losh andi. %r11, %r11, ~0x8000@l 47*9dc70af8SWarner Losh mtmsr %r11 48*9dc70af8SWarner Losh b main 49*9dc70af8SWarner Losh 50*9dc70af8SWarner Losh/* 51*9dc70af8SWarner Losh * syscall() 52*9dc70af8SWarner Losh */ 53*9dc70af8SWarner LoshENTRY(syscall) 54*9dc70af8SWarner Losh stwu %r1, -32(%r1) 55*9dc70af8SWarner Losh mflr %r0 56*9dc70af8SWarner Losh stw %r14, 8(%r1) 57*9dc70af8SWarner Losh stw %r30, 12(%r1) 58*9dc70af8SWarner Losh stw %r0, 36(%r1) 59*9dc70af8SWarner Losh /* Restore U-Boot's r14 and r30 */ 60*9dc70af8SWarner Losh lis %r11, saved_regs@ha 61*9dc70af8SWarner Losh addi %r11, %r11, saved_regs@l 62*9dc70af8SWarner Losh lwz %r14, 0(%r11) 63*9dc70af8SWarner Losh lwz %r30, 4(%r11) 64*9dc70af8SWarner Losh /* Enable interrupts */ 65*9dc70af8SWarner Losh mfmsr %r11 66*9dc70af8SWarner Losh ori %r11, %r11, 0x8000@l 67*9dc70af8SWarner Losh mtmsr %r11 68*9dc70af8SWarner Losh /* Call into U-Boot */ 69*9dc70af8SWarner Losh lis %r11, syscall_ptr@ha 70*9dc70af8SWarner Losh addi %r11, %r11, syscall_ptr@l 71*9dc70af8SWarner Losh lwz %r11, 0(%r11) 72*9dc70af8SWarner Losh mtctr %r11 73*9dc70af8SWarner Losh bctrl 74*9dc70af8SWarner Losh /* Disable interrupts */ 75*9dc70af8SWarner Losh mfmsr %r11 76*9dc70af8SWarner Losh andi. %r11, %r11, ~0x8000@l 77*9dc70af8SWarner Losh mtmsr %r11 78*9dc70af8SWarner Losh /* Epilogue */ 79*9dc70af8SWarner Losh lwz %r11, 0(%r1) 80*9dc70af8SWarner Losh lwz %r0, 4(%r11) 81*9dc70af8SWarner Losh mtlr %r0 82*9dc70af8SWarner Losh lwz %r14, 8(%r1) 83*9dc70af8SWarner Losh lwz %r30, 12(%r1) 84*9dc70af8SWarner Losh mr %r1, %r11 85*9dc70af8SWarner Losh blr 86*9dc70af8SWarner LoshEND(syscall) 87*9dc70af8SWarner Losh 88*9dc70af8SWarner Losh/* 89*9dc70af8SWarner Losh * Data section 90*9dc70af8SWarner Losh */ 91*9dc70af8SWarner Losh .data 92*9dc70af8SWarner LoshGLOBAL(syscall_ptr) 93*9dc70af8SWarner Losh .long 0 94*9dc70af8SWarner LoshGLOBAL(saved_regs) 95*9dc70af8SWarner Losh .long 0 /* R14 */ 96*9dc70af8SWarner Losh .long 0 /* R30 */ 97*9dc70af8SWarner LoshGLOBAL(uboot_address) 98*9dc70af8SWarner Losh .long 0 99