/* * ========== Copyright Header Begin ========================================== * * OpenSPARC T2 Processor File: tso_n1_self_mod1.s * Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved * 4150 Network Circle, Santa Clara, California 95054, U.S.A. * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * For the avoidance of doubt, and except that if any non-GPL license * choice is available it will apply instead, Sun elects to use only * the General Public License version 2 (GPLv2) at this time for any * software where a choice of GPL license versions is made * available with the language indicating that GPLv2 or any later version * may be used, or where a choice of which version of the GPL is applied is * otherwise unspecified. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * * ========== Copyright Header End ============================================ */ #define MAIN_BASE_DATA_ADDR 0x160000 #define MAIN_BASE_TEXT_ADDR 0x150000 #define MAIN_BASE_DATA_ADDR_RA 0x100160000 #define MAIN_BASE_TEXT_ADDR_RA 0x100150000 #define USER_PAGE_CUSTOM_MAP #include "hboot.s" SECTION .MAIN TEXT_VA=0x150000, DATA_VA=0x160000 attr_text { Name = .MAIN, VA=MAIN_BASE_TEXT_ADDR, RA=MAIN_BASE_TEXT_ADDR_RA, PA=ra2pa(MAIN_BASE_TEXT_ADDR_RA,0), part_0_ctx_nonzero_tsb_config_0, TTE_G=0, TTE_Context=PCONTEXT, TTE_V=1, TTE_Size=0, TTE_NFO=0, TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_EP=1, TTE_P=0, TTE_W=1 } attr_data { Name = .MAIN, VA=MAIN_BASE_DATA_ADDR, RA=MAIN_BASE_DATA_ADDR_RA, PA=ra2pa(MAIN_BASE_DATA_ADDR_RA,0), part_0_ctx_nonzero_tsb_config_0, TTE_G=0, TTE_Context=PCONTEXT, TTE_V=1, TTE_Size=0, TTE_NFO=0, TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_W=1 } .text .global main main: clr %l0 firstExecuteMain1: set main1,%i0 jmpl %i0,%o7 !the jump causes a new cache line to be nop !loaded into the l2 and the icache. nop nop modifyCodeAtMain1: set copied_code, %i0 !get some known data into the store reg. ld [%i0],%l0 set main1,%i0 !change the data at main1 st %l0,[%i0] flush %i0 !flush is mandatory here execute_main1_again: set main1,%i0 jmpl %i0,%o7 !the jump causes a new cache line to be nop !loaded into the ecache and the icache. mov 7, %l1 ! check that the modified instruction sub %l1, %l0, %l1 ! is used and not the original brnz,pn %l1, bad_end nop get_new_cache_line: ! do pretty much the same thing set main2, %i0 ! with another address ld [%i0], %l0 ! modify the address and then set new_cache_line, %i0 st %l0,[%i0] flush %i0 execute_new_cache_line: ! execute set new_cache_line,%i0 jmpl %i0,%o7 !the jump causes a new cache line to be nop !loaded into the ecache and the icache. nop set 0xbe, %l1 sub %l1, %l0, %l1 brnz,pn %l1, bad_end nop normal_end: ta T_GOOD_TRAP bad_end: ta T_BAD_TRAP !========================================================================== ! the point of these next two pages is to have text pages that ! can be written and read ! The first page holds 2 cache lines worth, the second page has 1 cache line. !========================================================================== main1: mov 1,%l0 ! Replaced with copied_code second pass jmpl %o7+8, %g0 nop copied_code: mov 7,%l0 nop nop nop nop nop nop nop nop nop nop nop nop new_cache_line: mov 0xbad,%l0 jmpl %o7+8, %g0 nop nop user_text2_end: main2: mov 0xbe,%l0 ! Replaced with copied_code second pass jmpl %o7+8, %g0 nop !====================================== .data user_data_start: .word 0x0 user_data_end: