19dc70af8SWarner Losh/*- 29dc70af8SWarner Losh * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com> 39dc70af8SWarner Losh * All rights reserved. 49dc70af8SWarner Losh * 59dc70af8SWarner Losh * Redistribution and use in source and binary forms, with or without 69dc70af8SWarner Losh * modification, are permitted provided that the following conditions 79dc70af8SWarner Losh * are met: 89dc70af8SWarner Losh * 1. Redistributions of source code must retain the above copyright 99dc70af8SWarner Losh * notice, this list of conditions and the following disclaimer. 109dc70af8SWarner Losh * 2. Redistributions in binary form must reproduce the above copyright 119dc70af8SWarner Losh * notice, this list of conditions and the following disclaimer in the 129dc70af8SWarner Losh * documentation and/or other materials provided with the distribution. 139dc70af8SWarner Losh * 149dc70af8SWarner Losh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 159dc70af8SWarner Losh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 169dc70af8SWarner Losh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 179dc70af8SWarner Losh * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 189dc70af8SWarner Losh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 199dc70af8SWarner Losh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 209dc70af8SWarner Losh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 219dc70af8SWarner Losh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 229dc70af8SWarner Losh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 239dc70af8SWarner Losh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 249dc70af8SWarner Losh * SUCH DAMAGE. 259dc70af8SWarner Losh */ 269dc70af8SWarner Losh 279dc70af8SWarner Losh#include <machine/asm.h> 289dc70af8SWarner Losh 299dc70af8SWarner Losh/* 309dc70af8SWarner Losh * Entry point to the loader that U-Boot passes control to. 319dc70af8SWarner Losh */ 329dc70af8SWarner Losh .text 339dc70af8SWarner Losh .globl _start 349dc70af8SWarner Losh_start: 359dc70af8SWarner Losh /* Hint where to look for the API signature */ 369dc70af8SWarner Losh lis %r11, uboot_address@ha 379dc70af8SWarner Losh addi %r11, %r11, uboot_address@l 389dc70af8SWarner Losh stw %r1, 0(%r11) 399dc70af8SWarner Losh /* Save U-Boot's r14 and r30 */ 409dc70af8SWarner Losh lis %r11, saved_regs@ha 419dc70af8SWarner Losh addi %r11, %r11, saved_regs@l 429dc70af8SWarner Losh stw %r14, 0(%r11) 439dc70af8SWarner Losh stw %r30, 4(%r11) 449dc70af8SWarner Losh /* Disable interrupts */ 459dc70af8SWarner Losh mfmsr %r11 469dc70af8SWarner Losh andi. %r11, %r11, ~0x8000@l 479dc70af8SWarner Losh mtmsr %r11 489dc70af8SWarner Losh b main 499dc70af8SWarner Losh 509dc70af8SWarner Losh/* 519dc70af8SWarner Losh * syscall() 529dc70af8SWarner Losh */ 539dc70af8SWarner LoshENTRY(syscall) 549dc70af8SWarner Losh stwu %r1, -32(%r1) 559dc70af8SWarner Losh mflr %r0 569dc70af8SWarner Losh stw %r14, 8(%r1) 579dc70af8SWarner Losh stw %r30, 12(%r1) 589dc70af8SWarner Losh stw %r0, 36(%r1) 599dc70af8SWarner Losh /* Restore U-Boot's r14 and r30 */ 609dc70af8SWarner Losh lis %r11, saved_regs@ha 619dc70af8SWarner Losh addi %r11, %r11, saved_regs@l 629dc70af8SWarner Losh lwz %r14, 0(%r11) 639dc70af8SWarner Losh lwz %r30, 4(%r11) 649dc70af8SWarner Losh /* Enable interrupts */ 659dc70af8SWarner Losh mfmsr %r11 669dc70af8SWarner Losh ori %r11, %r11, 0x8000@l 679dc70af8SWarner Losh mtmsr %r11 689dc70af8SWarner Losh /* Call into U-Boot */ 699dc70af8SWarner Losh lis %r11, syscall_ptr@ha 709dc70af8SWarner Losh addi %r11, %r11, syscall_ptr@l 719dc70af8SWarner Losh lwz %r11, 0(%r11) 729dc70af8SWarner Losh mtctr %r11 739dc70af8SWarner Losh bctrl 749dc70af8SWarner Losh /* Disable interrupts */ 759dc70af8SWarner Losh mfmsr %r11 769dc70af8SWarner Losh andi. %r11, %r11, ~0x8000@l 779dc70af8SWarner Losh mtmsr %r11 789dc70af8SWarner Losh /* Epilogue */ 799dc70af8SWarner Losh lwz %r11, 0(%r1) 809dc70af8SWarner Losh lwz %r0, 4(%r11) 819dc70af8SWarner Losh mtlr %r0 829dc70af8SWarner Losh lwz %r14, 8(%r1) 839dc70af8SWarner Losh lwz %r30, 12(%r1) 849dc70af8SWarner Losh mr %r1, %r11 859dc70af8SWarner Losh blr 869dc70af8SWarner LoshEND(syscall) 879dc70af8SWarner Losh 889dc70af8SWarner Losh/* 899dc70af8SWarner Losh * Data section 909dc70af8SWarner Losh */ 919dc70af8SWarner Losh .data 929dc70af8SWarner LoshGLOBAL(syscall_ptr) 939dc70af8SWarner Losh .long 0 949dc70af8SWarner LoshGLOBAL(saved_regs) 959dc70af8SWarner Losh .long 0 /* R14 */ 969dc70af8SWarner Losh .long 0 /* R30 */ 979dc70af8SWarner LoshGLOBAL(uboot_address) 989dc70af8SWarner Losh .long 0 99