| 1 | #ifndef _ASM_M32R_ASSEMBLER_H
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| 2 | #define _ASM_M32R_ASSEMBLER_H
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| 3 |
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| 4 | |
| 5 | * linux/asm-m32r/assembler.h
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| 6 | *
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| 7 | * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
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| 8 | *
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| 9 | * This file contains M32R architecture specific macro definitions.
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| 10 |
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| 11 |
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| 12 |
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| 13 | #ifndef __STR
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| 14 | #ifdef __ASSEMBLY__
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| 15 | #define __STR(x) x
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| 16 | #else
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| 17 | #define __STR(x) #x
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| 18 | #endif
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| 19 | #endif
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| 20 |
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| 21 | #ifdef CONFIG_SMP
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| 22 | #define M32R_LOCK __STR(lock)
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| 23 | #define M32R_UNLOCK __STR(unlock)
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| 24 | #else
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| 25 | #define M32R_LOCK __STR(ld)
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| 26 | #define M32R_UNLOCK __STR(st)
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| 27 | #endif
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| 28 |
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| 29 | #ifdef __ASSEMBLY__
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| 30 | #undef ENTRY
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| 31 | #define ENTRY(name) ENTRY_M name
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| 32 | .macro ENTRY_M name
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| 33 | .global \name
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| 34 | ALIGN
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| 35 | \name:
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| 36 | .endm
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| 37 | #endif
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| 38 |
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| 39 |
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| 40 | |
| 41 | * LDIMM - load immediate value
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| 42 | * STI - enable interruption
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| 43 | * CLI - disable interruption
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| 44 |
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| 45 |
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| 46 | #ifdef __ASSEMBLY__
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| 47 |
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| 48 | #define LDIMM(reg,x) LDIMM reg x
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| 49 | .macro LDIMM reg x
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| 50 | seth \reg, #high(\x)
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| 51 | or3 \reg, \reg, #low(\x)
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| 52 | .endm
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| 53 |
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| 54 | #if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
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| 55 | #define STI(reg) STI_M reg
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| 56 | .macro STI_M reg
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| 57 | setpsw #0x40 -> nop
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| 58 | ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
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| 59 | .endm
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| 60 |
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| 61 | #define CLI(reg) CLI_M reg
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| 62 | .macro CLI_M reg
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| 63 | clrpsw #0x40 -> nop
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| 64 | ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
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| 65 | .endm
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| 66 | #else
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| 67 | #define STI(reg) STI_M reg
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| 68 | .macro STI_M reg
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| 69 | mvfc \reg, psw
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| 70 | or3 \reg, \reg, #0x0040
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| 71 | mvtc \reg, psw
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| 72 | .endm
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| 73 |
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| 74 | #define CLI(reg) CLI_M reg
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| 75 | .macro CLI_M reg
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| 76 | mvfc \reg, psw
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| 77 | and3 \reg, \reg, #0xffbf
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| 78 | mvtc \reg, psw
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| 79 | .endm
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| 80 | #endif
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| 81 |
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| 82 | .macro SAVE_ALL
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| 83 | push r0 ; orig_r0
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| 84 | push sp ; spi (r15)
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| 85 | push lr ; r14
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| 86 | push r13
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| 87 | mvfc r13, cr3 ; spu
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| 88 | push r13
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| 89 | mvfc r13, bbpc
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| 90 | push r13
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| 91 | mvfc r13, bbpsw
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| 92 | push r13
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| 93 | mvfc r13, bpc
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| 94 | push r13
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| 95 | mvfc r13, psw
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| 96 | push r13
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| 97 | #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
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| 98 | mvfaclo r13, a1
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| 99 | push r13
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| 100 | mvfachi r13, a1
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| 101 | push r13
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| 102 | mvfaclo r13, a0
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| 103 | push r13
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| 104 | mvfachi r13, a0
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| 105 | push r13
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| 106 | #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
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| 107 | mvfaclo r13
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| 108 | push r13
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| 109 | mvfachi r13
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| 110 | push r13
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| 111 | ldi r13, #0
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| 112 | push r13 ; dummy push acc1h
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| 113 | push r13 ; dummy push acc1l
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| 114 | #else
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| 115 | #error unknown isa configuration
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| 116 | #endif
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| 117 | ldi r13, #-1
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| 118 | push r13 ; syscall_nr (default: -1)
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| 119 | push r12
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| 120 | push r11
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| 121 | push r10
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| 122 | push r9
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| 123 | push r8
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| 124 | push r7
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| 125 | push r3
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| 126 | push r2
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| 127 | push r1
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| 128 | push r0
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| 129 | addi sp, #-4 ; room for implicit pt_regs parameter
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| 130 | push r6
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| 131 | push r5
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| 132 | push r4
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| 133 | .endm
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| 134 |
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| 135 | .macro RESTORE_ALL
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| 136 | pop r4
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| 137 | pop r5
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| 138 | pop r6
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| 139 | addi sp, #4
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| 140 | pop r0
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| 141 | pop r1
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| 142 | pop r2
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| 143 | pop r3
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| 144 | pop r7
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| 145 | pop r8
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| 146 | pop r9
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| 147 | pop r10
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| 148 | pop r11
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| 149 | pop r12
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| 150 | addi r15, #4 ; Skip syscall number
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| 151 | #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
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| 152 | pop r13
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| 153 | mvtachi r13, a0
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| 154 | pop r13
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| 155 | mvtaclo r13, a0
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| 156 | pop r13
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| 157 | mvtachi r13, a1
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| 158 | pop r13
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| 159 | mvtaclo r13, a1
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| 160 | #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
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| 161 | pop r13 ; dummy pop acc1h
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| 162 | pop r13 ; dummy pop acc1l
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| 163 | pop r13
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| 164 | mvtachi r13
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| 165 | pop r13
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| 166 | mvtaclo r13
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| 167 | #else
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| 168 | #error unknown isa configuration
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| 169 | #endif
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| 170 | pop r14
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| 171 | mvtc r14, psw
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| 172 | pop r14
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| 173 | mvtc r14, bpc
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| 174 | addi sp, #8 ; Skip bbpsw, bbpc
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| 175 | pop r14
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| 176 | mvtc r14, cr3 ; spu
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| 177 | pop r13
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| 178 | pop lr ; r14
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| 179 | pop sp ; spi (r15)
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| 180 | addi sp, #4 ; Skip orig_r0
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| 181 | .fillinsn
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| 182 | 1: rte
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| 183 | .section .fixup,"ax"
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| 184 | 2: bl do_exit
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| 185 | .previous
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| 186 | .section __ex_table,"a"
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| 187 | ALIGN
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| 188 | .long 1b, 2b
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| 189 | .previous
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| 190 | .endm
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| 191 |
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| 192 | #define GET_CURRENT(reg) get_current reg
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| 193 | .macro get_current reg
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| 194 | ldi \reg, #-8192
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| 195 | and \reg, sp
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| 196 | .endm
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| 197 |
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| 198 | #if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
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| 199 | .macro SWITCH_TO_KERNEL_STACK
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| 200 | ; switch to kernel stack (spi)
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| 201 | clrpsw #0x80 -> nop
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| 202 | .endm
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| 203 | #else
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| 204 | .macro SWITCH_TO_KERNEL_STACK
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| 205 | push r0 ; save r0 for working
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| 206 | mvfc r0, psw
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| 207 | and3 r0, r0, #0x00ff7f
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| 208 | mvtc r0, psw
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| 209 | slli r0, #16
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| 210 | bltz r0, 1f ; check BSM-bit
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| 211 | ;
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| 212 | ;; called from kernel context: previous stack = spi
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| 213 | pop r0 ; retrieve r0
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| 214 | bra 2f
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| 215 | .fillinsn
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| 216 | 1:
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| 217 | ;; called from user context: previous stack = spu
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| 218 | mvfc r0, cr3 ; spu
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| 219 | addi r0, #4
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| 220 | mvtc r0, cr3 ; spu
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| 221 | ld r0, @(-4,r0) ; retrieve r0
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| 222 | .fillinsn
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| 223 | 2:
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| 224 | .endm
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| 225 | #endif
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| 226 |
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| 227 | #endif
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| 228 |
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| 229 | #endif
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