^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #ifndef __ASM_ARC_ENTRY_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define __ASM_ARC_ENTRY_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/unistd.h> /* For NR_syscalls defination */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/arcregs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/processor.h> /* For VMALLOC_START */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/mmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #ifdef CONFIG_ISA_ARCOMPACT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/entry-compact.h> /* ISA specific bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/entry-arcv2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /* Note on the LD/ST addr modes with addr reg wback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * LD.a same as LD.aw
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * LD.a reg1, [reg2, x] => Pre Incr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * Eff Addr for load = [reg2 + x]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * LD.ab reg1, [reg2, x] => Post Incr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Eff Addr for load = [reg2]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .macro PUSH reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) st.a \reg, [sp, -4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .macro PUSHAX aux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) lr r9, [\aux]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) PUSH r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .macro POP reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ld.ab \reg, [sp, 4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .macro POPAX aux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) POP r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) sr r9, [\aux]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*--------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Helpers to save/restore Scratch Regs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * used by Interrupt/Exception Prologue/Epilogue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) *-------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .macro SAVE_R0_TO_R12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) PUSH r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) PUSH r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) PUSH r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) PUSH r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) PUSH r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) PUSH r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) PUSH r6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) PUSH r7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) PUSH r8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) PUSH r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) PUSH r10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) PUSH r11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) PUSH r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .macro RESTORE_R12_TO_R0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) POP r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) POP r11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) POP r10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) POP r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) POP r8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) POP r7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) POP r6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) POP r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) POP r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) POP r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) POP r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) POP r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) POP r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /*--------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * Helpers to save/restore callee-saved regs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * used by several macros below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) *-------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .macro SAVE_R13_TO_R24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) PUSH r13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) PUSH r14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) PUSH r15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) PUSH r16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) PUSH r17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) PUSH r18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) PUSH r19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) PUSH r20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) PUSH r21
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) PUSH r22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) PUSH r23
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) PUSH r24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .macro RESTORE_R24_TO_R13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) POP r24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) POP r23
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) POP r22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) POP r21
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) POP r20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) POP r19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) POP r18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) POP r17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) POP r16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) POP r15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) POP r14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) POP r13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /*--------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * Collect User Mode callee regs as struct callee_regs - needed by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * fork/do_signal/unaligned-access-emulation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * (By default only scratch regs are saved on entry to kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * Special handling for r25 if used for caching Task Pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * It would have been saved in task->thread.user_r25 already, but to keep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * the interface same it is copied into regular r25 placeholder in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * struct callee_regs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) *-------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .macro SAVE_CALLEE_SAVED_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) mov r12, sp ; save SP as ref to pt_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) SAVE_R13_TO_R24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ; Retrieve orig r25 and save it with rest of callee_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ld r12, [r12, PT_user_r25]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) PUSH r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) PUSH r25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /*--------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * Save kernel Mode callee regs at the time of Contect Switch.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * Special handling for r25 if used for caching Task Pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * Kernel simply skips saving it since it will be loaded with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * incoming task pointer anyways
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) *-------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .macro SAVE_CALLEE_SAVED_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) SAVE_R13_TO_R24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) sub sp, sp, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) PUSH r25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /*--------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * Opposite of SAVE_CALLEE_SAVED_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) *-------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .macro RESTORE_CALLEE_SAVED_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) add sp, sp, 4 /* skip usual r25 placeholder */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) POP r25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) RESTORE_R24_TO_R13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /*--------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * Opposite of SAVE_CALLEE_SAVED_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * ptrace tracer or unaligned-access fixup might have changed a user mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * callee reg which is saved back to usual r25 storage location
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) *-------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .macro RESTORE_CALLEE_SAVED_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) POP r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) POP r25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) RESTORE_R24_TO_R13
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) ; SP is back to start of pt_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) st r12, [sp, PT_user_r25]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /*--------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * Super FAST Restore callee saved regs by simply re-adjusting SP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) *-------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .macro DISCARD_CALLEE_SAVED_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) add sp, sp, SZ_CALLEE_REGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /*-------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * given a tsk struct, get to the base of it's kernel mode stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * tsk->thread_info is really a PAGE, whose bottom hoists stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * which grows upwards towards thread_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) *------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) .macro GET_TSK_STACK_BASE tsk, out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* Get task->thread_info (this is essentially start of a PAGE) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) ld \out, [\tsk, TASK_THREAD_INFO]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /* Go to end of page where stack begins (grows upwards) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) add2 \out, \out, (THREAD_SIZE)/4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * @reg [OUT] thread_info->flags of "current"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) .macro GET_CURR_THR_INFO_FLAGS reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) GET_CURR_THR_INFO_FROM_SP \reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) ld \reg, [\reg, THREAD_INFO_FLAGS]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /*-------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * Retrieve the current running task on this CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * 1. Determine curr CPU id.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * 2. Use it to index into _current_task[ ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) .macro GET_CURR_TASK_ON_CPU reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) GET_CPU_ID \reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) ld.as \reg, [@_current_task, \reg]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /*-------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * Save a new task as the "current" task on this CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * 1. Determine curr CPU id.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * 2. Use it to index into _current_task[ ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * Coded differently than GET_CURR_TASK_ON_CPU (which uses LD.AS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * because ST r0, [r1, offset] can ONLY have s9 @offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * while LD can take s9 (4 byte insn) or LIMM (8 byte insn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) .macro SET_CURR_TASK_ON_CPU tsk, tmp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) GET_CPU_ID \tmp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) add2 \tmp, @_current_task, \tmp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) st \tsk, [\tmp]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) mov r25, \tsk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) #else /* Uniprocessor implementation of macros */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) .macro GET_CURR_TASK_ON_CPU reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) ld \reg, [@_current_task]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) .macro SET_CURR_TASK_ON_CPU tsk, tmp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) st \tsk, [@_current_task]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) mov r25, \tsk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) #endif /* SMP / UNI */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* ------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * Get the ptr to some field of Current Task at @off in task struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * -Uses r25 for Current task ptr if that is enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) #ifdef CONFIG_ARC_CURR_IN_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) .macro GET_CURR_TASK_FIELD_PTR off, reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) add \reg, r25, \off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) .macro GET_CURR_TASK_FIELD_PTR off, reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) GET_CURR_TASK_ON_CPU \reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) add \reg, \reg, \off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) #endif /* CONFIG_ARC_CURR_IN_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) #endif /* __ASM_ARC_ENTRY_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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