b9377ffc3a
Our pseries hcall interfaces are out of control: plpar_hcall_norets plpar_hcall plpar_hcall_8arg_2ret plpar_hcall_4out plpar_hcall_7arg_7ret plpar_hcall_9arg_9ret Create 3 interfaces to cover all cases: plpar_hcall_norets: 7 arguments no returns plpar_hcall: 6 arguments 4 returns plpar_hcall9: 9 arguments 9 returns There are only 2 cases in the kernel that need plpar_hcall9, hopefully we can keep it that way. Pass in a buffer to stash return parameters so we avoid the &dummy1, &dummy2 madness. Signed-off-by: Anton Blanchard <anton@samba.org> -- Signed-off-by: Paul Mackerras <paulus@samba.org>
93 lines
1.6 KiB
ArmAsm
93 lines
1.6 KiB
ArmAsm
/*
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* This file contains the generic code to perform a call to the
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* pSeries LPAR hypervisor.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/hvcall.h>
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#include <asm/processor.h>
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#include <asm/ppc_asm.h>
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#define STK_PARM(i) (48 + ((i)-3)*8)
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.text
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_GLOBAL(plpar_hcall_norets)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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HVSC /* invoke the hypervisor */
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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_GLOBAL(plpar_hcall)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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std r4,STK_PARM(r4)(r1) /* Save ret buffer */
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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HVSC /* invoke the hypervisor */
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ld r12,STK_PARM(r4)(r1)
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std r4, 0(r12)
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std r5, 8(r12)
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std r6, 16(r12)
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std r7, 24(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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_GLOBAL(plpar_hcall9)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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std r4,STK_PARM(r4)(r1) /* Save ret buffer */
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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ld r10,STK_PARM(r11)(r1) /* put arg7 in R10 */
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ld r11,STK_PARM(r12)(r1) /* put arg8 in R11 */
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ld r12,STK_PARM(r13)(r1) /* put arg9 in R12 */
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HVSC /* invoke the hypervisor */
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ld r12,STK_PARM(r4)(r1)
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std r4, 0(r12)
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std r5, 8(r12)
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std r6, 16(r12)
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std r7, 24(r12)
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std r8, 32(r12)
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std r9, 40(r12)
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std r10,48(r12)
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std r11,56(r12)
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std r12,64(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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