projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 1da177e4 LT |
2 | * This file contains the generic code to perform a call to the |
| 3 | * pSeries LPAR hypervisor. | |
| 1da177e4 LT |
4 | * |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of the GNU General Public License | |
| 7 | * as published by the Free Software Foundation; either version | |
| 8 | * 2 of the License, or (at your option) any later version. | |
| 9 | */ | |
| 10 | #include <asm/hvcall.h> | |
| 11 | #include <asm/processor.h> | |
| 12 | #include <asm/ppc_asm.h> | |
| 57852a85 | 13 | #include <asm/asm-offsets.h> |
| 46f52210 | 14 | #include <asm/ptrace.h> |
| 1da177e4 LT |
15 | |
| 16 | #define STK_PARM(i) (48 + ((i)-3)*8) | |
| 17 | ||
| c8cd093a AB |
18 | #ifdef CONFIG_TRACEPOINTS |
| 19 | ||
| 20 | .section ".toc","aw" | |
| 21 | ||
| 22 | .globl hcall_tracepoint_refcount | |
| 23 | hcall_tracepoint_refcount: | |
| 24 | .llong 0 | |
| 25 | ||
| 26 | .section ".text" | |
| 27 | ||
| 57852a85 MK |
28 | /* |
| 29 | * precall must preserve all registers. use unused STK_PARM() | |
| c8cd093a AB |
30 | * areas to save snapshots and opcode. We branch around this |
| 31 | * in early init (eg when populating the MMU hashtable) by using an | |
| 32 | * unconditional cpu feature. | |
| 57852a85 | 33 | */ |
| 6f26353c | 34 | #define HCALL_INST_PRECALL(FIRST_REG) \ |
| 57852a85 | 35 | BEGIN_FTR_SECTION; \ |
| c8cd093a AB |
36 | b 1f; \ |
| 37 | END_FTR_SECTION(0, 1); \ | |
| 38 | ld r12,hcall_tracepoint_refcount@toc(r2); \ | |
| ebb7f616 | 39 | std r12,32(r1); \ |
| c8cd093a AB |
40 | cmpdi r12,0; \ |
| 41 | beq+ 1f; \ | |
| 42 | mflr r0; \ | |
| c75df6f9 MN |
43 | std r3,STK_PARM(R3)(r1); \ |
| 44 | std r4,STK_PARM(R4)(r1); \ | |
| 45 | std r5,STK_PARM(R5)(r1); \ | |
| 46 | std r6,STK_PARM(R6)(r1); \ | |
| 47 | std r7,STK_PARM(R7)(r1); \ | |
| 48 | std r8,STK_PARM(R8)(r1); \ | |
| 49 | std r9,STK_PARM(R9)(r1); \ | |
| 50 | std r10,STK_PARM(R10)(r1); \ | |
| c8cd093a | 51 | std r0,16(r1); \ |
| 6f26353c | 52 | addi r4,r1,STK_PARM(FIRST_REG); \ |
| c8cd093a AB |
53 | stdu r1,-STACK_FRAME_OVERHEAD(r1); \ |
| 54 | bl .__trace_hcall_entry; \ | |
| 55 | addi r1,r1,STACK_FRAME_OVERHEAD; \ | |
| 56 | ld r0,16(r1); \ | |
| c75df6f9 MN |
57 | ld r3,STK_PARM(R3)(r1); \ |
| 58 | ld r4,STK_PARM(R4)(r1); \ | |
| 59 | ld r5,STK_PARM(R5)(r1); \ | |
| 60 | ld r6,STK_PARM(R6)(r1); \ | |
| 61 | ld r7,STK_PARM(R7)(r1); \ | |
| 62 | ld r8,STK_PARM(R8)(r1); \ | |
| 63 | ld r9,STK_PARM(R9)(r1); \ | |
| 64 | ld r10,STK_PARM(R10)(r1); \ | |
| c8cd093a AB |
65 | mtlr r0; \ |
| 66 | 1: | |
| 67 | ||
| 57852a85 MK |
68 | /* |
| 69 | * postcall is performed immediately before function return which | |
| 4f5fa2fb AB |
70 | * allows liberal use of volatile registers. We branch around this |
| 71 | * in early init (eg when populating the MMU hashtable) by using an | |
| 72 | * unconditional cpu feature. | |
| 57852a85 | 73 | */ |
| 6f26353c | 74 | #define __HCALL_INST_POSTCALL \ |
| 4f5fa2fb AB |
75 | BEGIN_FTR_SECTION; \ |
| 76 | b 1f; \ | |
| 77 | END_FTR_SECTION(0, 1); \ | |
| ebb7f616 | 78 | ld r12,32(r1); \ |
| c8cd093a AB |
79 | cmpdi r12,0; \ |
| 80 | beq+ 1f; \ | |
| 81 | mflr r0; \ | |
| c75df6f9 MN |
82 | ld r6,STK_PARM(R3)(r1); \ |
| 83 | std r3,STK_PARM(R3)(r1); \ | |
| c8cd093a AB |
84 | mr r4,r3; \ |
| 85 | mr r3,r6; \ | |
| 86 | std r0,16(r1); \ | |
| 87 | stdu r1,-STACK_FRAME_OVERHEAD(r1); \ | |
| 88 | bl .__trace_hcall_exit; \ | |
| 89 | addi r1,r1,STACK_FRAME_OVERHEAD; \ | |
| 90 | ld r0,16(r1); \ | |
| c75df6f9 | 91 | ld r3,STK_PARM(R3)(r1); \ |
| c8cd093a | 92 | mtlr r0; \ |
| 57852a85 | 93 | 1: |
| 6f26353c AB |
94 | |
| 95 | #define HCALL_INST_POSTCALL_NORETS \ | |
| 96 | li r5,0; \ | |
| 97 | __HCALL_INST_POSTCALL | |
| 98 | ||
| 99 | #define HCALL_INST_POSTCALL(BUFREG) \ | |
| 100 | mr r5,BUFREG; \ | |
| 101 | __HCALL_INST_POSTCALL | |
| 102 | ||
| 57852a85 | 103 | #else |
| 6f26353c AB |
104 | #define HCALL_INST_PRECALL(FIRST_ARG) |
| 105 | #define HCALL_INST_POSTCALL_NORETS | |
| 106 | #define HCALL_INST_POSTCALL(BUFREG) | |
| 57852a85 MK |
107 | #endif |
| 108 | ||
| 1da177e4 LT |
109 | .text |
| 110 | ||
| 1da177e4 | 111 | _GLOBAL(plpar_hcall_norets) |
| eeb24de4 AB |
112 | HMT_MEDIUM |
| 113 | ||
| 1da177e4 LT |
114 | mfcr r0 |
| 115 | stw r0,8(r1) | |
| 116 | ||
| c75df6f9 | 117 | HCALL_INST_PRECALL(R4) |
| 57852a85 | 118 | |
| 1da177e4 LT |
119 | HVSC /* invoke the hypervisor */ |
| 120 | ||
| 6f26353c | 121 | HCALL_INST_POSTCALL_NORETS |
| 57852a85 | 122 | |
| 1da177e4 LT |
123 | lwz r0,8(r1) |
| 124 | mtcrf 0xff,r0 | |
| 125 | blr /* return r3 = status */ | |
| 126 | ||
| b9377ffc | 127 | _GLOBAL(plpar_hcall) |
| eeb24de4 AB |
128 | HMT_MEDIUM |
| 129 | ||
| 1da177e4 | 130 | mfcr r0 |
| 1da177e4 LT |
131 | stw r0,8(r1) |
| 132 | ||
| c75df6f9 | 133 | HCALL_INST_PRECALL(R5) |
| 57852a85 | 134 | |
| c75df6f9 | 135 | std r4,STK_PARM(R4)(r1) /* Save ret buffer */ |
| 1da177e4 | 136 | |
| b9377ffc AB |
137 | mr r4,r5 |
| 138 | mr r5,r6 | |
| 139 | mr r6,r7 | |
| 140 | mr r7,r8 | |
| 141 | mr r8,r9 | |
| 142 | mr r9,r10 | |
| 1da177e4 LT |
143 | |
| 144 | HVSC /* invoke the hypervisor */ | |
| 145 | ||
| c75df6f9 | 146 | ld r12,STK_PARM(R4)(r1) |
| b9377ffc AB |
147 | std r4, 0(r12) |
| 148 | std r5, 8(r12) | |
| 149 | std r6, 16(r12) | |
| 150 | std r7, 24(r12) | |
| b13a96cf | 151 | |
| 6f26353c | 152 | HCALL_INST_POSTCALL(r12) |
| 57852a85 | 153 | |
| b13a96cf | 154 | lwz r0,8(r1) |
| b13a96cf HS |
155 | mtcrf 0xff,r0 |
| 156 | ||
| 157 | blr /* return r3 = status */ | |
| 158 | ||
| b4aea36b MK |
159 | /* |
| 160 | * plpar_hcall_raw can be called in real mode. kexec/kdump need some | |
| 161 | * hypervisor calls to be executed in real mode. So plpar_hcall_raw | |
| 162 | * does not access the per cpu hypervisor call statistics variables, | |
| 163 | * since these variables may not be present in the RMO region. | |
| 164 | */ | |
| 165 | _GLOBAL(plpar_hcall_raw) | |
| 166 | HMT_MEDIUM | |
| 167 | ||
| 168 | mfcr r0 | |
| 169 | stw r0,8(r1) | |
| 170 | ||
| c75df6f9 | 171 | std r4,STK_PARM(R4)(r1) /* Save ret buffer */ |
| b4aea36b MK |
172 | |
| 173 | mr r4,r5 | |
| 174 | mr r5,r6 | |
| 175 | mr r6,r7 | |
| 176 | mr r7,r8 | |
| 177 | mr r8,r9 | |
| 178 | mr r9,r10 | |
| 179 | ||
| 180 | HVSC /* invoke the hypervisor */ | |
| 181 | ||
| c75df6f9 | 182 | ld r12,STK_PARM(R4)(r1) |
| b4aea36b MK |
183 | std r4, 0(r12) |
| 184 | std r5, 8(r12) | |
| 185 | std r6, 16(r12) | |
| 186 | std r7, 24(r12) | |
| 187 | ||
| 188 | lwz r0,8(r1) | |
| 189 | mtcrf 0xff,r0 | |
| 190 | ||
| 191 | blr /* return r3 = status */ | |
| 192 | ||
| b9377ffc | 193 | _GLOBAL(plpar_hcall9) |
| b13a96cf HS |
194 | HMT_MEDIUM |
| 195 | ||
| 196 | mfcr r0 | |
| 197 | stw r0,8(r1) | |
| 198 | ||
| c75df6f9 | 199 | HCALL_INST_PRECALL(R5) |
| 57852a85 | 200 | |
| c75df6f9 | 201 | std r4,STK_PARM(R4)(r1) /* Save ret buffer */ |
| b9377ffc AB |
202 | |
| 203 | mr r4,r5 | |
| 204 | mr r5,r6 | |
| 205 | mr r6,r7 | |
| 206 | mr r7,r8 | |
| 207 | mr r8,r9 | |
| 208 | mr r9,r10 | |
| c75df6f9 MN |
209 | ld r10,STK_PARM(R11)(r1) /* put arg7 in R10 */ |
| 210 | ld r11,STK_PARM(R12)(r1) /* put arg8 in R11 */ | |
| 211 | ld r12,STK_PARM(R13)(r1) /* put arg9 in R12 */ | |
| b13a96cf HS |
212 | |
| 213 | HVSC /* invoke the hypervisor */ | |
| 214 | ||
| ab87e8dc | 215 | mr r0,r12 |
| c75df6f9 | 216 | ld r12,STK_PARM(R4)(r1) |
| b9377ffc AB |
217 | std r4, 0(r12) |
| 218 | std r5, 8(r12) | |
| 219 | std r6, 16(r12) | |
| 220 | std r7, 24(r12) | |
| 221 | std r8, 32(r12) | |
| 222 | std r9, 40(r12) | |
| 223 | std r10,48(r12) | |
| 224 | std r11,56(r12) | |
| ab87e8dc | 225 | std r0, 64(r12) |
| b13a96cf | 226 | |
| 6f26353c | 227 | HCALL_INST_POSTCALL(r12) |
| 57852a85 | 228 | |
| b13a96cf HS |
229 | lwz r0,8(r1) |
| 230 | mtcrf 0xff,r0 | |
| 231 | ||
| 232 | blr /* return r3 = status */ | |
| f90ece28 MN |
233 | |
| 234 | /* See plpar_hcall_raw to see why this is needed */ | |
| 235 | _GLOBAL(plpar_hcall9_raw) | |
| 236 | HMT_MEDIUM | |
| 237 | ||
| 238 | mfcr r0 | |
| 239 | stw r0,8(r1) | |
| 240 | ||
| c75df6f9 | 241 | std r4,STK_PARM(R4)(r1) /* Save ret buffer */ |
| f90ece28 MN |
242 | |
| 243 | mr r4,r5 | |
| 244 | mr r5,r6 | |
| 245 | mr r6,r7 | |
| 246 | mr r7,r8 | |
| 247 | mr r8,r9 | |
| 248 | mr r9,r10 | |
| c75df6f9 MN |
249 | ld r10,STK_PARM(R11)(r1) /* put arg7 in R10 */ |
| 250 | ld r11,STK_PARM(R12)(r1) /* put arg8 in R11 */ | |
| 251 | ld r12,STK_PARM(R13)(r1) /* put arg9 in R12 */ | |
| f90ece28 MN |
252 | |
| 253 | HVSC /* invoke the hypervisor */ | |
| 254 | ||
| 255 | mr r0,r12 | |
| c75df6f9 | 256 | ld r12,STK_PARM(R4)(r1) |
| f90ece28 MN |
257 | std r4, 0(r12) |
| 258 | std r5, 8(r12) | |
| 259 | std r6, 16(r12) | |
| 260 | std r7, 24(r12) | |
| 261 | std r8, 32(r12) | |
| 262 | std r9, 40(r12) | |
| 263 | std r10,48(r12) | |
| 264 | std r11,56(r12) | |
| 265 | std r0, 64(r12) | |
| 266 | ||
| 267 | lwz r0,8(r1) | |
| 268 | mtcrf 0xff,r0 | |
| 269 | ||
| 270 | blr /* return r3 = status */ |