root/arch/powerpc/boot/ps3-hvcall.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  PS3 bootwrapper hvcalls.
   4  *
   5  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   6  *  Copyright 2007 Sony Corp.
   7  */
   8 
   9 #include "ppc_asm.h"
  10 
  11         .machine "ppc64"
  12 
  13 /*
  14  * The PS3 hypervisor uses a 64 bit "C" language calling convention.
  15  * The routines here marshal arguments between the 32 bit wrapper
  16  * program and the 64 bit hvcalls.
  17  *
  18  *  wrapper           lv1
  19  *  32-bit (h,l)      64-bit
  20  *
  21  *  1: r3,r4          <-> r3
  22  *  2: r5,r6          <-> r4
  23  *  3: r7,r8          <-> r5
  24  *  4: r9,r10         <-> r6
  25  *  5: 8(r1),12(r1)   <-> r7
  26  *  6: 16(r1),20(r1)  <-> r8
  27  *  7: 24(r1),28(r1)  <-> r9
  28  *  8: 32(r1),36(r1)  <-> r10
  29  *
  30  */
  31 
  32 .macro GLOBAL name
  33         .section ".text"
  34         .balign 4
  35         .globl \name
  36 \name:
  37 .endm
  38 
  39 .macro NO_SUPPORT name
  40         GLOBAL \name
  41         b ps3_no_support
  42 .endm
  43 
  44 .macro HVCALL num
  45         li r11, \num
  46         .long 0x44000022
  47         extsw r3, r3
  48 .endm
  49 
  50 .macro SAVE_LR offset=4
  51         mflr r0
  52         stw r0, \offset(r1)
  53 .endm
  54 
  55 .macro LOAD_LR offset=4
  56         lwz r0, \offset(r1)
  57         mtlr r0
  58 .endm
  59 
  60 .macro LOAD_64_REG target,high,low
  61         sldi r11, \high, 32
  62         or \target, r11, \low
  63 .endm
  64 
  65 .macro LOAD_64_STACK target,offset
  66         ld \target, \offset(r1)
  67 .endm
  68 
  69 .macro LOAD_R3
  70         LOAD_64_REG r3,r3,r4
  71 .endm
  72 
  73 .macro LOAD_R4
  74         LOAD_64_REG r4,r5,r6
  75 .endm
  76 
  77 .macro LOAD_R5
  78         LOAD_64_REG r5,r7,r8
  79 .endm
  80 
  81 .macro LOAD_R6
  82         LOAD_64_REG r6,r9,r10
  83 .endm
  84 
  85 .macro LOAD_R7
  86         LOAD_64_STACK r7,8
  87 .endm
  88 
  89 .macro LOAD_R8
  90         LOAD_64_STACK r8,16
  91 .endm
  92 
  93 .macro LOAD_R9
  94         LOAD_64_STACK r9,24
  95 .endm
  96 
  97 .macro LOAD_R10
  98         LOAD_64_STACK r10,32
  99 .endm
 100 
 101 .macro LOAD_REGS_0
 102         stwu 1,-16(1)
 103         stw 3, 8(1)
 104 .endm
 105 
 106 .macro LOAD_REGS_5
 107         LOAD_R3
 108         LOAD_R4
 109         LOAD_R5
 110         LOAD_R6
 111         LOAD_R7
 112 .endm
 113 
 114 .macro LOAD_REGS_6
 115         LOAD_REGS_5
 116         LOAD_R8
 117 .endm
 118 
 119 .macro LOAD_REGS_8
 120         LOAD_REGS_6
 121         LOAD_R9
 122         LOAD_R10
 123 .endm
 124 
 125 .macro STORE_REGS_0_1
 126         lwz r11, 8(r1)
 127         std r4, 0(r11)
 128         mr r4, r3
 129         li r3, 0
 130         addi r1,r1,16
 131 .endm
 132 
 133 .macro STORE_REGS_5_2
 134         lwz r11, 16(r1)
 135         std r4, 0(r11)
 136         lwz r11, 20(r1)
 137         std r5, 0(r11)
 138 .endm
 139 
 140 .macro STORE_REGS_6_1
 141         lwz r11, 24(r1)
 142         std r4, 0(r11)
 143 .endm
 144 
 145 GLOBAL lv1_get_logical_ppe_id
 146         SAVE_LR
 147         LOAD_REGS_0
 148         HVCALL 69
 149         STORE_REGS_0_1
 150         LOAD_LR
 151         blr
 152 
 153 GLOBAL lv1_get_logical_partition_id
 154         SAVE_LR
 155         LOAD_REGS_0
 156         HVCALL 74
 157         STORE_REGS_0_1
 158         LOAD_LR
 159         blr
 160 
 161 GLOBAL lv1_get_repository_node_value
 162         SAVE_LR
 163         LOAD_REGS_5
 164         HVCALL 91
 165         STORE_REGS_5_2
 166         LOAD_LR
 167         blr
 168 
 169 GLOBAL lv1_panic
 170         SAVE_LR
 171         LOAD_REGS_8
 172         HVCALL 255
 173         LOAD_LR
 174         blr