| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * OpenSPARC T2 Processor File: tso_n1_self_mod101.s |
| 5 | * Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 6 | * 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 7 | * |
| 8 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; version 2 of the License. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | * For the avoidance of doubt, and except that if any non-GPL license |
| 24 | * choice is available it will apply instead, Sun elects to use only |
| 25 | * the General Public License version 2 (GPLv2) at this time for any |
| 26 | * software where a choice of GPL license versions is made |
| 27 | * available with the language indicating that GPLv2 or any later version |
| 28 | * may be used, or where a choice of which version of the GPL is applied is |
| 29 | * otherwise unspecified. |
| 30 | * |
| 31 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 32 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 33 | * have any questions. |
| 34 | * |
| 35 | * |
| 36 | * ========== Copyright Header End ============================================ |
| 37 | */ |
| 38 | #define MAIN_BASE_DATA_ADDR 0x160000 |
| 39 | #define MAIN_BASE_TEXT_ADDR 0x150000 |
| 40 | #define MAIN_BASE_DATA_ADDR_RA 0x100160000 |
| 41 | #define MAIN_BASE_TEXT_ADDR_RA 0x100150000 |
| 42 | |
| 43 | #define USER_PAGE_CUSTOM_MAP |
| 44 | #include "hboot.s" |
| 45 | |
| 46 | SECTION .MAIN TEXT_VA=0x150000, DATA_VA=0x160000 |
| 47 | |
| 48 | attr_text { |
| 49 | Name = .MAIN, |
| 50 | VA=MAIN_BASE_TEXT_ADDR, |
| 51 | RA=MAIN_BASE_TEXT_ADDR_RA, |
| 52 | PA=ra2pa(MAIN_BASE_TEXT_ADDR_RA,0), |
| 53 | part_0_ctx_nonzero_tsb_config_0, |
| 54 | TTE_G=0, TTE_Context=PCONTEXT, TTE_V=1, TTE_Size=0, TTE_NFO=0, |
| 55 | TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, |
| 56 | TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_EP=1, TTE_W=1 |
| 57 | } |
| 58 | attr_data { |
| 59 | Name = .MAIN, |
| 60 | VA=MAIN_BASE_DATA_ADDR, |
| 61 | RA=MAIN_BASE_DATA_ADDR_RA, |
| 62 | PA=ra2pa(MAIN_BASE_DATA_ADDR_RA,0), |
| 63 | part_0_ctx_nonzero_tsb_config_0, |
| 64 | TTE_G=0, TTE_Context=PCONTEXT, TTE_V=1, TTE_Size=0, TTE_NFO=0, |
| 65 | TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, |
| 66 | TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_W=1 |
| 67 | } |
| 68 | |
| 69 | .text |
| 70 | .global main |
| 71 | main: clr %l0 |
| 72 | |
| 73 | ! Case 1: Start from the line state being Invalid, goes to Shared |
| 74 | !=============================================================== |
| 75 | |
| 76 | firstExecuteMain1: |
| 77 | set main1,%i0 |
| 78 | jmpl %i0,%o7 ! the jump causes a new cache line to be |
| 79 | nop ! loaded into the l2 and the icache. |
| 80 | nop |
| 81 | nop |
| 82 | |
| 83 | |
| 84 | modifyCodeAtMain1: |
| 85 | set copied_code, %i0 ! Get known data into the store reg. |
| 86 | set main1,%i1 ! Change data at main1 |
| 87 | ld [%i1],%l0 ! Bring main1 to D$ for testing |
| 88 | ! THIS IS THE NEW FEATURE compared |
| 89 | ! to self_mod1 |
| 90 | ld [%i0],%l0 |
| 91 | st %l0,[%i1] |
| 92 | flush %i0 ! flush is mandatory here |
| 93 | |
| 94 | execute_main1_again: |
| 95 | set main1,%i0 |
| 96 | jmpl %i0,%o7 |
| 97 | nop |
| 98 | |
| 99 | mov 7, %l1 ! check that the modified instruction |
| 100 | sub %l1, %l0, %l1 ! is used and not the original |
| 101 | brnz,pn %l1, bad_end |
| 102 | nop |
| 103 | |
| 104 | get_new_cache_line: ! Same thing but with another address |
| 105 | set main2, %i0 |
| 106 | set new_cache_line, %i1 |
| 107 | ld [%i1],%l0 |
| 108 | ld [%i0], %l0 |
| 109 | st %l0,[%i1] |
| 110 | flush %i0 |
| 111 | |
| 112 | execute_new_cache_line: |
| 113 | set new_cache_line,%i0 |
| 114 | jmpl %i0,%o7 |
| 115 | nop |
| 116 | nop |
| 117 | set 0xbe, %l1 |
| 118 | sub %l1, %l0, %l1 |
| 119 | brnz,pn %l1, bad_end |
| 120 | nop |
| 121 | |
| 122 | normal_end: |
| 123 | ta T_GOOD_TRAP |
| 124 | bad_end: |
| 125 | ta T_BAD_TRAP |
| 126 | |
| 127 | |
| 128 | !========================================================================== |
| 129 | ! the point of these next two pages is to have text pages that |
| 130 | ! can be written and read |
| 131 | ! The first page holds 2 cache lines worth, the second page has 1 cache line. |
| 132 | !========================================================================== |
| 133 | |
| 134 | main1: |
| 135 | mov 1,%l0 ! Replaced with copied_code second pass |
| 136 | jmpl %o7+8, %g0 |
| 137 | nop |
| 138 | copied_code: |
| 139 | mov 7,%l0 |
| 140 | nop |
| 141 | nop |
| 142 | nop |
| 143 | nop |
| 144 | nop |
| 145 | nop |
| 146 | nop |
| 147 | nop |
| 148 | nop |
| 149 | nop |
| 150 | nop |
| 151 | nop |
| 152 | new_cache_line: |
| 153 | mov 0xbad,%l0 |
| 154 | jmpl %o7+8, %g0 |
| 155 | nop |
| 156 | nop |
| 157 | user_text2_end: |
| 158 | |
| 159 | main2: |
| 160 | mov 0xbe,%l0 ! Replaced with copied_code second pass |
| 161 | jmpl %o7+8, %g0 |
| 162 | nop |
| 163 | |
| 164 | !====================================== |
| 165 | .data |
| 166 | user_data_start: |
| 167 | .word 0x0 |
| 168 | user_data_end: |