Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * File: mca_asm.h |
| 3 | * |
| 4 | * Copyright (C) 1999 Silicon Graphics, Inc. |
| 5 | * Copyright (C) Vijay Chander (vijay@engr.sgi.com) |
| 6 | * Copyright (C) Srinivasa Thirumalachar <sprasad@engr.sgi.com> |
| 7 | * Copyright (C) 2000 Hewlett-Packard Co. |
| 8 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> |
| 9 | * Copyright (C) 2002 Intel Corp. |
| 10 | * Copyright (C) 2002 Jenna Hall <jenna.s.hall@intel.com> |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 11 | * Copyright (C) 2005 Silicon Graphics, Inc |
| 12 | * Copyright (C) 2005 Keith Owens <kaos@sgi.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | */ |
| 14 | #ifndef _ASM_IA64_MCA_ASM_H |
| 15 | #define _ASM_IA64_MCA_ASM_H |
| 16 | |
| 17 | #define PSR_IC 13 |
| 18 | #define PSR_I 14 |
| 19 | #define PSR_DT 17 |
| 20 | #define PSR_RT 27 |
| 21 | #define PSR_MC 35 |
| 22 | #define PSR_IT 36 |
| 23 | #define PSR_BN 44 |
| 24 | |
| 25 | /* |
| 26 | * This macro converts a instruction virtual address to a physical address |
| 27 | * Right now for simulation purposes the virtual addresses are |
| 28 | * direct mapped to physical addresses. |
| 29 | * 1. Lop off bits 61 thru 63 in the virtual address |
| 30 | */ |
| 31 | #define INST_VA_TO_PA(addr) \ |
| 32 | dep addr = 0, addr, 61, 3 |
| 33 | /* |
| 34 | * This macro converts a data virtual address to a physical address |
| 35 | * Right now for simulation purposes the virtual addresses are |
| 36 | * direct mapped to physical addresses. |
| 37 | * 1. Lop off bits 61 thru 63 in the virtual address |
| 38 | */ |
| 39 | #define DATA_VA_TO_PA(addr) \ |
| 40 | tpa addr = addr |
| 41 | /* |
| 42 | * This macro converts a data physical address to a virtual address |
| 43 | * Right now for simulation purposes the virtual addresses are |
| 44 | * direct mapped to physical addresses. |
| 45 | * 1. Put 0x7 in bits 61 thru 63. |
| 46 | */ |
| 47 | #define DATA_PA_TO_VA(addr,temp) \ |
| 48 | mov temp = 0x7 ;; \ |
| 49 | dep addr = temp, addr, 61, 3 |
| 50 | |
| 51 | #define GET_THIS_PADDR(reg, var) \ |
| 52 | mov reg = IA64_KR(PER_CPU_DATA);; \ |
| 53 | addl reg = THIS_CPU(var), reg |
| 54 | |
| 55 | /* |
| 56 | * This macro jumps to the instruction at the given virtual address |
| 57 | * and starts execution in physical mode with all the address |
| 58 | * translations turned off. |
| 59 | * 1. Save the current psr |
| 60 | * 2. Make sure that all the upper 32 bits are off |
| 61 | * |
| 62 | * 3. Clear the interrupt enable and interrupt state collection bits |
| 63 | * in the psr before updating the ipsr and iip. |
| 64 | * |
| 65 | * 4. Turn off the instruction, data and rse translation bits of the psr |
| 66 | * and store the new value into ipsr |
| 67 | * Also make sure that the interrupts are disabled. |
| 68 | * Ensure that we are in little endian mode. |
| 69 | * [psr.{rt, it, dt, i, be} = 0] |
| 70 | * |
| 71 | * 5. Get the physical address corresponding to the virtual address |
| 72 | * of the next instruction bundle and put it in iip. |
| 73 | * (Using magic numbers 24 and 40 in the deposint instruction since |
| 74 | * the IA64_SDK code directly maps to lower 24bits as physical address |
| 75 | * from a virtual address). |
| 76 | * |
| 77 | * 6. Do an rfi to move the values from ipsr to psr and iip to ip. |
| 78 | */ |
| 79 | #define PHYSICAL_MODE_ENTER(temp1, temp2, start_addr, old_psr) \ |
| 80 | mov old_psr = psr; \ |
| 81 | ;; \ |
| 82 | dep old_psr = 0, old_psr, 32, 32; \ |
| 83 | \ |
| 84 | mov ar.rsc = 0 ; \ |
| 85 | ;; \ |
| 86 | srlz.d; \ |
| 87 | mov temp2 = ar.bspstore; \ |
| 88 | ;; \ |
| 89 | DATA_VA_TO_PA(temp2); \ |
| 90 | ;; \ |
| 91 | mov temp1 = ar.rnat; \ |
| 92 | ;; \ |
| 93 | mov ar.bspstore = temp2; \ |
| 94 | ;; \ |
| 95 | mov ar.rnat = temp1; \ |
| 96 | mov temp1 = psr; \ |
| 97 | mov temp2 = psr; \ |
| 98 | ;; \ |
| 99 | \ |
| 100 | dep temp2 = 0, temp2, PSR_IC, 2; \ |
| 101 | ;; \ |
| 102 | mov psr.l = temp2; \ |
| 103 | ;; \ |
| 104 | srlz.d; \ |
| 105 | dep temp1 = 0, temp1, 32, 32; \ |
| 106 | ;; \ |
| 107 | dep temp1 = 0, temp1, PSR_IT, 1; \ |
| 108 | ;; \ |
| 109 | dep temp1 = 0, temp1, PSR_DT, 1; \ |
| 110 | ;; \ |
| 111 | dep temp1 = 0, temp1, PSR_RT, 1; \ |
| 112 | ;; \ |
| 113 | dep temp1 = 0, temp1, PSR_I, 1; \ |
| 114 | ;; \ |
| 115 | dep temp1 = 0, temp1, PSR_IC, 1; \ |
| 116 | ;; \ |
| 117 | dep temp1 = -1, temp1, PSR_MC, 1; \ |
| 118 | ;; \ |
| 119 | mov cr.ipsr = temp1; \ |
| 120 | ;; \ |
| 121 | LOAD_PHYSICAL(p0, temp2, start_addr); \ |
| 122 | ;; \ |
| 123 | mov cr.iip = temp2; \ |
| 124 | mov cr.ifs = r0; \ |
| 125 | DATA_VA_TO_PA(sp); \ |
| 126 | DATA_VA_TO_PA(gp); \ |
| 127 | ;; \ |
| 128 | srlz.i; \ |
| 129 | ;; \ |
| 130 | nop 1; \ |
| 131 | nop 2; \ |
| 132 | nop 1; \ |
| 133 | nop 2; \ |
| 134 | rfi; \ |
| 135 | ;; |
| 136 | |
| 137 | /* |
| 138 | * This macro jumps to the instruction at the given virtual address |
| 139 | * and starts execution in virtual mode with all the address |
| 140 | * translations turned on. |
| 141 | * 1. Get the old saved psr |
| 142 | * |
| 143 | * 2. Clear the interrupt state collection bit in the current psr. |
| 144 | * |
| 145 | * 3. Set the instruction translation bit back in the old psr |
| 146 | * Note we have to do this since we are right now saving only the |
| 147 | * lower 32-bits of old psr.(Also the old psr has the data and |
| 148 | * rse translation bits on) |
| 149 | * |
| 150 | * 4. Set ipsr to this old_psr with "it" bit set and "bn" = 1. |
| 151 | * |
| 152 | * 5. Reset the current thread pointer (r13). |
| 153 | * |
| 154 | * 6. Set iip to the virtual address of the next instruction bundle. |
| 155 | * |
| 156 | * 7. Do an rfi to move ipsr to psr and iip to ip. |
| 157 | */ |
| 158 | |
| 159 | #define VIRTUAL_MODE_ENTER(temp1, temp2, start_addr, old_psr) \ |
| 160 | mov temp2 = psr; \ |
| 161 | ;; \ |
| 162 | mov old_psr = temp2; \ |
| 163 | ;; \ |
| 164 | dep temp2 = 0, temp2, PSR_IC, 2; \ |
| 165 | ;; \ |
| 166 | mov psr.l = temp2; \ |
| 167 | mov ar.rsc = 0; \ |
| 168 | ;; \ |
| 169 | srlz.d; \ |
| 170 | mov r13 = ar.k6; \ |
| 171 | mov temp2 = ar.bspstore; \ |
| 172 | ;; \ |
| 173 | DATA_PA_TO_VA(temp2,temp1); \ |
| 174 | ;; \ |
| 175 | mov temp1 = ar.rnat; \ |
| 176 | ;; \ |
| 177 | mov ar.bspstore = temp2; \ |
| 178 | ;; \ |
| 179 | mov ar.rnat = temp1; \ |
| 180 | ;; \ |
| 181 | mov temp1 = old_psr; \ |
| 182 | ;; \ |
| 183 | mov temp2 = 1; \ |
| 184 | ;; \ |
| 185 | dep temp1 = temp2, temp1, PSR_IC, 1; \ |
| 186 | ;; \ |
| 187 | dep temp1 = temp2, temp1, PSR_IT, 1; \ |
| 188 | ;; \ |
| 189 | dep temp1 = temp2, temp1, PSR_DT, 1; \ |
| 190 | ;; \ |
| 191 | dep temp1 = temp2, temp1, PSR_RT, 1; \ |
| 192 | ;; \ |
| 193 | dep temp1 = temp2, temp1, PSR_BN, 1; \ |
| 194 | ;; \ |
| 195 | \ |
| 196 | mov cr.ipsr = temp1; \ |
| 197 | movl temp2 = start_addr; \ |
| 198 | ;; \ |
| 199 | mov cr.iip = temp2; \ |
| 200 | ;; \ |
| 201 | DATA_PA_TO_VA(sp, temp1); \ |
| 202 | DATA_PA_TO_VA(gp, temp2); \ |
| 203 | srlz.i; \ |
| 204 | ;; \ |
| 205 | nop 1; \ |
| 206 | nop 2; \ |
| 207 | nop 1; \ |
| 208 | rfi \ |
| 209 | ;; |
| 210 | |
| 211 | /* |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 212 | * The MCA and INIT stacks in struct ia64_mca_cpu look like normal kernel |
| 213 | * stacks, except that the SAL/OS state and a switch_stack are stored near the |
| 214 | * top of the MCA/INIT stack. To support concurrent entry to MCA or INIT, as |
| 215 | * well as MCA over INIT, each event needs its own SAL/OS state. All entries |
| 216 | * are 16 byte aligned. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | * |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 218 | * +---------------------------+ |
| 219 | * | pt_regs | |
| 220 | * +---------------------------+ |
| 221 | * | switch_stack | |
| 222 | * +---------------------------+ |
| 223 | * | SAL/OS state | |
| 224 | * +---------------------------+ |
| 225 | * | 16 byte scratch area | |
| 226 | * +---------------------------+ <-------- SP at start of C MCA handler |
| 227 | * | ..... | |
| 228 | * +---------------------------+ |
| 229 | * | RBS for MCA/INIT handler | |
| 230 | * +---------------------------+ |
| 231 | * | struct task for MCA/INIT | |
| 232 | * +---------------------------+ <-------- Bottom of MCA/INIT stack |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Keith Owens | 7f613c7 | 2005-09-11 17:22:53 +1000 | [diff] [blame] | 235 | #define ALIGN16(x) ((x)&~15) |
| 236 | #define MCA_PT_REGS_OFFSET ALIGN16(KERNEL_STACK_SIZE-IA64_PT_REGS_SIZE) |
| 237 | #define MCA_SWITCH_STACK_OFFSET ALIGN16(MCA_PT_REGS_OFFSET-IA64_SWITCH_STACK_SIZE) |
| 238 | #define MCA_SOS_OFFSET ALIGN16(MCA_SWITCH_STACK_OFFSET-IA64_SAL_OS_STATE_SIZE) |
| 239 | #define MCA_SP_OFFSET ALIGN16(MCA_SOS_OFFSET-16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | #endif /* _ASM_IA64_MCA_ASM_H */ |