| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/ppc64/kernel/pSeries_hvCall.S |
| 3 | * |
| 4 | * This file contains the generic code to perform a call to the |
| 5 | * pSeries LPAR hypervisor. |
| 6 | * NOTE: this file will go away when we move to inline this work. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
| 13 | #include <asm/hvcall.h> |
| 14 | #include <asm/processor.h> |
| 15 | #include <asm/ppc_asm.h> |
| 16 | |
| 17 | #define STK_PARM(i) (48 + ((i)-3)*8) |
| 18 | |
| 19 | .text |
| 20 | |
| 21 | /* long plpar_hcall(unsigned long opcode, R3 |
| 22 | unsigned long arg1, R4 |
| 23 | unsigned long arg2, R5 |
| 24 | unsigned long arg3, R6 |
| 25 | unsigned long arg4, R7 |
| 26 | unsigned long *out1, R8 |
| 27 | unsigned long *out2, R9 |
| 28 | unsigned long *out3); R10 |
| 29 | */ |
| 30 | _GLOBAL(plpar_hcall) |
| 31 | mfcr r0 |
| 32 | |
| 33 | std r8,STK_PARM(r8)(r1) /* Save out ptrs */ |
| 34 | std r9,STK_PARM(r9)(r1) |
| 35 | std r10,STK_PARM(r10)(r1) |
| 36 | |
| 37 | stw r0,8(r1) |
| 38 | |
| 39 | HVSC /* invoke the hypervisor */ |
| 40 | |
| 41 | lwz r0,8(r1) |
| 42 | |
| 43 | ld r8,STK_PARM(r8)(r1) /* Fetch r4-r6 ret args */ |
| 44 | ld r9,STK_PARM(r9)(r1) |
| 45 | ld r10,STK_PARM(r10)(r1) |
| 46 | std r4,0(r8) |
| 47 | std r5,0(r9) |
| 48 | std r6,0(r10) |
| 49 | |
| 50 | mtcrf 0xff,r0 |
| 51 | blr /* return r3 = status */ |
| 52 | |
| 53 | |
| 54 | /* Simple interface with no output values (other than status) */ |
| 55 | _GLOBAL(plpar_hcall_norets) |
| 56 | mfcr r0 |
| 57 | stw r0,8(r1) |
| 58 | |
| 59 | HVSC /* invoke the hypervisor */ |
| 60 | |
| 61 | lwz r0,8(r1) |
| 62 | mtcrf 0xff,r0 |
| 63 | blr /* return r3 = status */ |
| 64 | |
| 65 | |
| 66 | /* long plpar_hcall_8arg_2ret(unsigned long opcode, R3 |
| 67 | unsigned long arg1, R4 |
| 68 | unsigned long arg2, R5 |
| 69 | unsigned long arg3, R6 |
| 70 | unsigned long arg4, R7 |
| 71 | unsigned long arg5, R8 |
| 72 | unsigned long arg6, R9 |
| 73 | unsigned long arg7, R10 |
| 74 | unsigned long arg8, 112(R1) |
| 75 | unsigned long *out1); 120(R1) |
| 76 | */ |
| 77 | _GLOBAL(plpar_hcall_8arg_2ret) |
| 78 | mfcr r0 |
| 79 | ld r11,STK_PARM(r11)(r1) /* put arg8 in R11 */ |
| 80 | stw r0,8(r1) |
| 81 | |
| 82 | HVSC /* invoke the hypervisor */ |
| 83 | |
| 84 | lwz r0,8(r1) |
| 85 | ld r10,STK_PARM(r12)(r1) /* Fetch r4 ret arg */ |
| 86 | std r4,0(r10) |
| 87 | mtcrf 0xff,r0 |
| 88 | blr /* return r3 = status */ |
| 89 | |
| 90 | |
| 91 | /* long plpar_hcall_4out(unsigned long opcode, R3 |
| 92 | unsigned long arg1, R4 |
| 93 | unsigned long arg2, R5 |
| 94 | unsigned long arg3, R6 |
| 95 | unsigned long arg4, R7 |
| 96 | unsigned long *out1, R8 |
| 97 | unsigned long *out2, R9 |
| 98 | unsigned long *out3, R10 |
| 99 | unsigned long *out4); 112(R1) |
| 100 | */ |
| 101 | _GLOBAL(plpar_hcall_4out) |
| 102 | mfcr r0 |
| 103 | stw r0,8(r1) |
| 104 | |
| 105 | std r8,STK_PARM(r8)(r1) /* Save out ptrs */ |
| 106 | std r9,STK_PARM(r9)(r1) |
| 107 | std r10,STK_PARM(r10)(r1) |
| 108 | |
| 109 | HVSC /* invoke the hypervisor */ |
| 110 | |
| 111 | lwz r0,8(r1) |
| 112 | |
| 113 | ld r8,STK_PARM(r8)(r1) /* Fetch r4-r7 ret args */ |
| 114 | ld r9,STK_PARM(r9)(r1) |
| 115 | ld r10,STK_PARM(r10)(r1) |
| 116 | ld r11,STK_PARM(r11)(r1) |
| 117 | std r4,0(r8) |
| 118 | std r5,0(r9) |
| 119 | std r6,0(r10) |
| 120 | std r7,0(r11) |
| 121 | |
| 122 | mtcrf 0xff,r0 |
| 123 | blr /* return r3 = status */ |