X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=arch%2Fpowerpc%2Fplatforms%2Fpseries%2FhvCall.S;h=c00cfed7af2c0a8b2531ff8e62f620ba971e21c2;hp=db7c19fe92972ccb3fc750e2d53a71737c608552;hb=8a84fc15ae5cafcc366dd85cf8e1ab2040679abc;hpb=2e9abdd9bad485970b37cd53a82f92702054984c diff --git a/arch/powerpc/platforms/pseries/hvCall.S b/arch/powerpc/platforms/pseries/hvCall.S index db7c19fe9297..c00cfed7af2c 100644 --- a/arch/powerpc/platforms/pseries/hvCall.S +++ b/arch/powerpc/platforms/pseries/hvCall.S @@ -1,7 +1,6 @@ /* * This file contains the generic code to perform a call to the * pSeries LPAR hypervisor. - * NOTE: this file will go away when we move to inline this work. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -11,119 +10,155 @@ #include #include #include +#include #define STK_PARM(i) (48 + ((i)-3)*8) +#ifdef CONFIG_HCALL_STATS +/* + * precall must preserve all registers. use unused STK_PARM() + * areas to save snapshots and opcode. + */ +#define HCALL_INST_PRECALL \ + std r3,STK_PARM(r3)(r1); /* save opcode */ \ + mftb r0; /* get timebase and */ \ + std r0,STK_PARM(r5)(r1); /* save for later */ \ +BEGIN_FTR_SECTION; \ + mfspr r0,SPRN_PURR; /* get PURR and */ \ + std r0,STK_PARM(r6)(r1); /* save for later */ \ +END_FTR_SECTION_IFCLR(CPU_FTR_PURR); + +/* + * postcall is performed immediately before function return which + * allows liberal use of volatile registers. + */ +#define HCALL_INST_POSTCALL \ + ld r4,STK_PARM(r3)(r1); /* validate opcode */ \ + cmpldi cr7,r4,MAX_HCALL_OPCODE; \ + bgt- cr7,1f; \ + \ + /* get time and PURR snapshots after hcall */ \ + mftb r7; /* timebase after */ \ +BEGIN_FTR_SECTION; \ + mfspr r8,SPRN_PURR; /* PURR after */ \ + ld r6,STK_PARM(r6)(r1); /* PURR before */ \ + subf r6,r6,r8; /* delta */ \ +END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \ + ld r5,STK_PARM(r5)(r1); /* timebase before */ \ + subf r5,r5,r7; /* time delta */ \ + \ + /* calculate address of stat structure r4 = opcode */ \ + srdi r4,r4,2; /* index into array */ \ + mulli r4,r4,HCALL_STAT_SIZE; \ + LOAD_REG_ADDR(r7, per_cpu__hcall_stats); \ + add r4,r4,r7; \ + ld r7,PACA_DATA_OFFSET(r13); /* per cpu offset */ \ + add r4,r4,r7; \ + \ + /* update stats */ \ + ld r7,HCALL_STAT_CALLS(r4); /* count */ \ + addi r7,r7,1; \ + std r7,HCALL_STAT_CALLS(r4); \ + ld r7,HCALL_STAT_TB(r4); /* timebase */ \ + add r7,r7,r5; \ + std r7,HCALL_STAT_TB(r4); \ +BEGIN_FTR_SECTION; \ + ld r7,HCALL_STAT_PURR(r4); /* PURR */ \ + add r7,r7,r6; \ + std r7,HCALL_STAT_PURR(r4); \ +END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \ +1: +#else +#define HCALL_INST_PRECALL +#define HCALL_INST_POSTCALL +#endif + .text -/* long plpar_hcall(unsigned long opcode, R3 - unsigned long arg1, R4 - unsigned long arg2, R5 - unsigned long arg3, R6 - unsigned long arg4, R7 - unsigned long *out1, R8 - unsigned long *out2, R9 - unsigned long *out3); R10 - */ -_GLOBAL(plpar_hcall) +_GLOBAL(plpar_hcall_norets) HMT_MEDIUM mfcr r0 - - std r8,STK_PARM(r8)(r1) /* Save out ptrs */ - std r9,STK_PARM(r9)(r1) - std r10,STK_PARM(r10)(r1) - stw r0,8(r1) - HVSC /* invoke the hypervisor */ + HCALL_INST_PRECALL - lwz r0,8(r1) + HVSC /* invoke the hypervisor */ - ld r8,STK_PARM(r8)(r1) /* Fetch r4-r6 ret args */ - ld r9,STK_PARM(r9)(r1) - ld r10,STK_PARM(r10)(r1) - std r4,0(r8) - std r5,0(r9) - std r6,0(r10) + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 blr /* return r3 = status */ - -/* Simple interface with no output values (other than status) */ -_GLOBAL(plpar_hcall_norets) +_GLOBAL(plpar_hcall) HMT_MEDIUM mfcr r0 stw r0,8(r1) - HVSC /* invoke the hypervisor */ + HCALL_INST_PRECALL - lwz r0,8(r1) - mtcrf 0xff,r0 - blr /* return r3 = status */ + std r4,STK_PARM(r4)(r1) /* Save ret buffer */ + mr r4,r5 + mr r5,r6 + mr r6,r7 + mr r7,r8 + mr r8,r9 + mr r9,r10 -/* long plpar_hcall_8arg_2ret(unsigned long opcode, R3 - unsigned long arg1, R4 - unsigned long arg2, R5 - unsigned long arg3, R6 - unsigned long arg4, R7 - unsigned long arg5, R8 - unsigned long arg6, R9 - unsigned long arg7, R10 - unsigned long arg8, 112(R1) - unsigned long *out1); 120(R1) - */ -_GLOBAL(plpar_hcall_8arg_2ret) - HMT_MEDIUM + HVSC /* invoke the hypervisor */ - mfcr r0 - ld r11,STK_PARM(r11)(r1) /* put arg8 in R11 */ - stw r0,8(r1) + ld r12,STK_PARM(r4)(r1) + std r4, 0(r12) + std r5, 8(r12) + std r6, 16(r12) + std r7, 24(r12) - HVSC /* invoke the hypervisor */ + HCALL_INST_POSTCALL lwz r0,8(r1) - ld r10,STK_PARM(r12)(r1) /* Fetch r4 ret arg */ - std r4,0(r10) mtcrf 0xff,r0 - blr /* return r3 = status */ + blr /* return r3 = status */ -/* long plpar_hcall_4out(unsigned long opcode, R3 - unsigned long arg1, R4 - unsigned long arg2, R5 - unsigned long arg3, R6 - unsigned long arg4, R7 - unsigned long *out1, R8 - unsigned long *out2, R9 - unsigned long *out3, R10 - unsigned long *out4); 112(R1) - */ -_GLOBAL(plpar_hcall_4out) +_GLOBAL(plpar_hcall9) HMT_MEDIUM mfcr r0 stw r0,8(r1) - std r8,STK_PARM(r8)(r1) /* Save out ptrs */ - std r9,STK_PARM(r9)(r1) - std r10,STK_PARM(r10)(r1) + HCALL_INST_PRECALL + + std r4,STK_PARM(r4)(r1) /* Save ret buffer */ + + mr r4,r5 + mr r5,r6 + mr r6,r7 + mr r7,r8 + mr r8,r9 + mr r9,r10 + ld r10,STK_PARM(r11)(r1) /* put arg7 in R10 */ + ld r11,STK_PARM(r12)(r1) /* put arg8 in R11 */ + ld r12,STK_PARM(r13)(r1) /* put arg9 in R12 */ HVSC /* invoke the hypervisor */ - lwz r0,8(r1) + ld r12,STK_PARM(r4)(r1) + std r4, 0(r12) + std r5, 8(r12) + std r6, 16(r12) + std r7, 24(r12) + std r8, 32(r12) + std r9, 40(r12) + std r10,48(r12) + std r11,56(r12) + std r12,64(r12) - ld r8,STK_PARM(r8)(r1) /* Fetch r4-r7 ret args */ - ld r9,STK_PARM(r9)(r1) - ld r10,STK_PARM(r10)(r1) - ld r11,STK_PARM(r11)(r1) - std r4,0(r8) - std r5,0(r9) - std r6,0(r10) - std r7,0(r11) + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 + blr /* return r3 = status */