| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * OpenSPARC T2 Processor File: tso_n1_cross_mod5.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_EP=1, TTE_P=0, TTE_W=1 |
| 57 | } |
| 58 | |
| 59 | attr_data { |
| 60 | Name = .MAIN, |
| 61 | VA=MAIN_BASE_DATA_ADDR, |
| 62 | RA=MAIN_BASE_DATA_ADDR_RA, |
| 63 | PA=ra2pa(MAIN_BASE_DATA_ADDR_RA,0), |
| 64 | part_0_ctx_nonzero_tsb_config_0, |
| 65 | TTE_G=0, TTE_Context=PCONTEXT, TTE_V=1, TTE_Size=0, TTE_NFO=0, |
| 66 | TTE_IE=0, TTE_Soft2=0, TTE_Diag=0, TTE_Soft=0, |
| 67 | TTE_L=0, TTE_CP=1, TTE_CV=1, TTE_E=0, TTE_P=0, TTE_W=1 |
| 68 | } |
| 69 | |
| 70 | .text |
| 71 | .global main |
| 72 | main: |
| 73 | clr %l0 |
| 74 | |
| 75 | th_fork(th_main,%l0) |
| 76 | |
| 77 | |
| 78 | ! this thread modfifies the code |
| 79 | !=============================== |
| 80 | th_main_0: |
| 81 | |
| 82 | set 0x40, %i7 ! loop counting |
| 83 | |
| 84 | setx ready, %l0, %l1 ! pointers... |
| 85 | setx noop, %l0, %l2 |
| 86 | ld [%l2], %o7 ! %o7 contains the nop command |
| 87 | |
| 88 | deliver_loop: |
| 89 | |
| 90 | setx modified1, %l0, %l3 ! |
| 91 | deliver_loop1: |
| 92 | ld [%l1], %o0 ! read ready. |
| 93 | tst %o0 ! should be 0. |
| 94 | bne deliver_loop1 |
| 95 | nop |
| 96 | |
| 97 | st %o7, [%l3] ! modify the code. |
| 98 | st %o7, [%l3 + 4] ! and then flush. |
| 99 | flush %l3 ! the register value does not matter |
| 100 | |
| 101 | setx modified2, %l0, %l3 ! |
| 102 | deliver_loop2: |
| 103 | ld [%l1 + 0x4], %o0 ! read ready. |
| 104 | tst %o0 ! should be 0. |
| 105 | bne deliver_loop2 |
| 106 | nop |
| 107 | |
| 108 | st %o7, [%l3] ! modify the code. |
| 109 | st %o7, [%l3 + 4] ! and then flush. |
| 110 | flush %l3 ! the register value does not matter |
| 111 | |
| 112 | setx modified3, %l0, %l3 ! |
| 113 | deliver_loop3: |
| 114 | ld [%l1 + 0x8], %o0 ! read ready. |
| 115 | tst %o0 ! should be 0. |
| 116 | bne deliver_loop3 |
| 117 | nop |
| 118 | |
| 119 | st %o7, [%l3] ! modify the code. |
| 120 | st %o7, [%l3 + 4] ! and then flush. |
| 121 | flush %l3 ! the register value does not matter |
| 122 | |
| 123 | deccc %i7 ! count |
| 124 | bne goon |
| 125 | nop |
| 126 | ba final_stuff ! go to end if finished |
| 127 | nop |
| 128 | |
| 129 | goon: |
| 130 | set 1, %i0 ! set ready |
| 131 | st %i0, [%l1] ! |
| 132 | st %i0, [%l1+4] ! |
| 133 | st %i0, [%l1+8] ! |
| 134 | ba deliver_loop ! repeat |
| 135 | nop |
| 136 | |
| 137 | final_stuff: |
| 138 | set 0x1, %i0 ! 55 means we are done. |
| 139 | st %i0, [%l1] ! |
| 140 | st %i0, [%l1+4] ! |
| 141 | set 0x55, %i0 ! 55 means we are done. |
| 142 | st %i0, [%l1+8] ! |
| 143 | ba good_end |
| 144 | nop |
| 145 | |
| 146 | ! these are the receivers |
| 147 | !------------------------ |
| 148 | th_main_1: |
| 149 | th_main_4: |
| 150 | |
| 151 | setx ready, %l0, %l1 ! pointers... |
| 152 | setx bad_end, %l0, %l2 |
| 153 | ld [%l2], %o7 ! o7 contains a ta 0x101 |
| 154 | |
| 155 | wait_loop: ! wait for ready flag |
| 156 | wait_loop1: ! wait for ready flag |
| 157 | ld [%l1], %o0 |
| 158 | subcc %o0, 0x1, %i1 ! code for available data |
| 159 | bne wait_loop1 |
| 160 | nop |
| 161 | nop |
| 162 | modified1: |
| 163 | ta T_BAD_TRAP ! this data is overwritten |
| 164 | ta T_BAD_TRAP ! with nop-s, so diag goes on. |
| 165 | |
| 166 | wait_loop2: ! wait for ready flag |
| 167 | ld [%l1+0x4], %o0 |
| 168 | subcc %o0, 0x1, %i1 ! check for end of test flag. |
| 169 | bne wait_loop2 |
| 170 | nop |
| 171 | nop |
| 172 | modified2: |
| 173 | ta T_BAD_TRAP ! this data is overwritten |
| 174 | ta T_BAD_TRAP ! with nop-s, so diag goes on. |
| 175 | |
| 176 | wait_loop3: ! wait for ready flag |
| 177 | ld [%l1+0x8], %o0 |
| 178 | subcc %o0, 0x55, %i1 ! check for end of test flag. |
| 179 | be good_end ! end the test |
| 180 | nop |
| 181 | subcc %o0, 0x1, %i1 ! code for available data |
| 182 | bne wait_loop3 |
| 183 | nop |
| 184 | nop |
| 185 | modified3: |
| 186 | ta T_BAD_TRAP ! this data is overwritten |
| 187 | ta T_BAD_TRAP ! with nop-s, so diag goes on. |
| 188 | |
| 189 | setx modified1, %l0, %l3 |
| 190 | st %o7, [%l3] ! now overwrite again to ta T_BAD_TRAP |
| 191 | st %o7, [%l3 + 4] |
| 192 | setx modified2, %l0, %l3 |
| 193 | st %o7, [%l3] ! now overwrite again to ta T_BAD_TRAP |
| 194 | st %o7, [%l3 + 4] |
| 195 | setx modified3, %l0, %l3 |
| 196 | st %o7, [%l3] ! now overwrite again to ta T_BAD_TRAP |
| 197 | st %o7, [%l3 + 4] |
| 198 | |
| 199 | st %g0, [%l1] ! reset the flags |
| 200 | st %g0, [%l1 + 4] |
| 201 | st %g0, [%l1 + 8] |
| 202 | |
| 203 | ba wait_loop ! do it again |
| 204 | nop |
| 205 | |
| 206 | good_end: |
| 207 | ta T_GOOD_TRAP |
| 208 | bad_end: |
| 209 | ta T_BAD_TRAP |
| 210 | noop: |
| 211 | nop |
| 212 | |
| 213 | !------------------------------------------------------------------------------ |
| 214 | |
| 215 | .data |
| 216 | .global ready |
| 217 | ready: |
| 218 | .word 0x0 |
| 219 | .word 0x0 |
| 220 | .word 0x0 |
| 221 | .word 0x0 |
| 222 | |
| 223 | .end |
| 224 | |