| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * OpenSPARC T2 Processor File: n2_err_l2_LDSC_cecc_trap.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 H_HT0_Hw_Corrected_Error_0x63 My_hw_corrected_error_handler |
| 39 | |
| 40 | #define MAIN_PAGE_HV_ALSO |
| 41 | |
| 42 | /* Set up L2$ in direct map and enable errors */ |
| 43 | /* Need to go to direct-map mode in order to guarantee the |
| 44 | * L2$ diagnostic address of the line we will corrupt */ |
| 45 | #define CREGS_L2_CTL_REG_DIS 0 |
| 46 | #define CREGS_L2_CTL_REG_ASSOCDIS 1 |
| 47 | #define CREGS_L2_ERR_EN_REG_CEEN 1 |
| 48 | #define CREGS_L2_ERR_EN_REG_NCEEN 1 |
| 49 | #define L2_REG_PROG 1 |
| 50 | |
| 51 | |
| 52 | #include "hboot.s" |
| 53 | #include "asi_s.h" |
| 54 | #include "err_defines.h" |
| 55 | |
| 56 | #define L2_ENTRY_PA 0xa000000000 |
| 57 | #define TEST_DATA1 0x5555555555555555 |
| 58 | #define TEST_PA 0x003000aa00 |
| 59 | /* bits [21:18] select way in direct-map mode */ |
| 60 | /* bits [17:9] select the set == 0x55, |
| 61 | so start L2_SCRUB at 0x50 */ |
| 62 | #define MASK_PA_21_3 0x3ffff8 |
| 63 | #define L2_ES_W1C_VALUE 0xc03ffff800000000 |
| 64 | #define SPARC_ES_W1C_VALUE 0xefffffff |
| 65 | #define TT_SW_Error 0x40 |
| 66 | |
| 67 | .text |
| 68 | .global main |
| 69 | |
| 70 | main: |
| 71 | |
| 72 | |
| 73 | ! Boot code does not provide TLB translation for IO address space |
| 74 | ta T_CHANGE_HPRIV |
| 75 | |
| 76 | |
| 77 | disable_l1_DCache: |
| 78 | ldxa [%g0] ASI_LSU_CONTROL, %l0 |
| 79 | ! Remove bit 2 |
| 80 | andn %l0, 0x2, %l0 |
| 81 | stxa %l0, [%g0] ASI_LSU_CONTROL |
| 82 | |
| 83 | |
| 84 | clear_l2_ESR: |
| 85 | setx L2_ES_W1C_VALUE, %l0, %l1 |
| 86 | setx L2ES_PA0, %l6, %g1 |
| 87 | stx %l1, [%g1] |
| 88 | |
| 89 | |
| 90 | /* Bring the line into L2$ */ |
| 91 | store_to_L2: |
| 92 | setx TEST_DATA1, %l0, %g5 |
| 93 | |
| 94 | store_to_L2_way0: |
| 95 | setx TEST_PA, %l0, %g2 |
| 96 | stx %g5, [%g2] |
| 97 | stx %g5, [%g2+8] |
| 98 | membar #Sync |
| 99 | |
| 100 | /* Because membar only waits for L2$ to enque the request, |
| 101 | and it may take much longer for MCU to return data, |
| 102 | we need to stall by doing a load */ |
| 103 | load_stored_data: |
| 104 | ldx [%g2],%l0 |
| 105 | |
| 106 | L2_diag_load: |
| 107 | setx MASK_PA_21_3, %l0, %l2 ! Mask for extracting [21:3] |
| 108 | setx L2_ENTRY_PA, %l0, %g4 |
| 109 | and %g2, %l2, %g5 !g2 has L2 PA, |
| 110 | or %g5, %g4, %g5 !g5 now has Diagnostic Data Array address |
| 111 | ldx [%g5], %g6 |
| 112 | membar #Sync |
| 113 | |
| 114 | ! Flip one bit to inject error |
| 115 | xor %g6, 0x200, %g6 |
| 116 | stx %g6, [%g5] |
| 117 | membar #Sync |
| 118 | |
| 119 | setup_read_loop: ! Set up a loop to cause L2$ fills |
| 120 | add %g2, 64*8, %g3 ! Pick the next index in same L2$ bank |
| 121 | setx 4*1024*1024, %l0, %l1 ! Offset to next L2$ alias (4MB) |
| 122 | mov 20, %l7 ! Maximum outer loop iterations |
| 123 | |
| 124 | outer_read_loop: |
| 125 | mov %g3, %l3 |
| 126 | mov 50, %l6 ! Maximum inner loop iterations |
| 127 | |
| 128 | inner_read_loop: |
| 129 | ldx [%l3], %l0 |
| 130 | dec %l6 |
| 131 | brnz %l6, inner_read_loop |
| 132 | add %l3, %l1, %l3 |
| 133 | |
| 134 | decrement_outer_loop_counter: |
| 135 | dec %l7 |
| 136 | brnz %l7, outer_read_loop |
| 137 | nop |
| 138 | |
| 139 | outer_loop_ended_without_LDSC: |
| 140 | ta T_BAD_TRAP |
| 141 | |
| 142 | |
| 143 | .global My_hw_corrected_error_handler |
| 144 | My_hw_corrected_error_handler: |
| 145 | rdpr %tt, %o1 |
| 146 | cmp %o1, 0x63 |
| 147 | trap_if_wrong_trap_type: |
| 148 | tne %xcc, T_BAD_TRAP |
| 149 | |
| 150 | check_DESR: |
| 151 | ldxa [%g0]ASI_DESR, %o2 ! Also clears desr |
| 152 | mov 1, %o1 |
| 153 | sllx %o1, (63-56), %o1 |
| 154 | add %o1, DESR_HCE_L2C, %o1 |
| 155 | sllx %o1, 56, %o1 |
| 156 | cmp %o2, %o1 |
| 157 | trap_if_wrong_DESR: |
| 158 | tne %xcc, T_BAD_TRAP |
| 159 | |
| 160 | check_l2_ESR: |
| 161 | setx L2ES_PA0, %l6, %g1 |
| 162 | ldx [%g1], %l4 |
| 163 | setx mpeval((1<<L2ES_LDSC)+(1<<L2ES_VEC)), %o0, %o1 |
| 164 | cmp %l4, %o1 |
| 165 | trap_if_wrong_L2_ESR: |
| 166 | tne %xcc, T_BAD_TRAP |
| 167 | |
| 168 | check_l2_EAR: |
| 169 | setx L2EA_PA0, %l6, %l3 |
| 170 | ldx [%l3], %l4 |
| 171 | setx (TEST_PA & MASK_PA_21_3), %o0, %o1 |
| 172 | cmp %l4, %o1 |
| 173 | trap_if_wrong_L2_EAR: |
| 174 | tne %xcc, T_BAD_TRAP |
| 175 | |
| 176 | /******************************************************* |
| 177 | * Exit code |
| 178 | *******************************************************/ |
| 179 | |
| 180 | test_pass: |
| 181 | ta T_GOOD_TRAP |
| 182 | |
| 183 | test_fail: |
| 184 | ta T_BAD_TRAP |