Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Copyright 2018, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  This file contains general idle entry/exit functions to save
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *  and restore stack and NVGPRs which allows C code to call idle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  states that lose GPRs, and it will return transparently with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *  SRR1 wakeup reason return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *  The platform / CPU caller must ensure SPRs and any other non-GPR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *  state is saved and restored correctly, handle KVM, interrupts, etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <asm/ppc_asm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <asm/asm-offsets.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <asm/ppc-opcode.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <asm/cpuidle.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <asm/thread_info.h> /* TLF_NAPPING */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #ifdef CONFIG_PPC_P7_NAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * Desired PSSCR in r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * No state will be lost regardless of wakeup mechanism (interrupt or NIA).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * An EC=0 type wakeup will return with a value of 0. SRESET wakeup (which can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * happen with xscom SRESET and possibly MCE) may clobber volatiles except LR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * and must blr, to return to caller with r3 set according to caller's expected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * return code (for Book3S/64 that is SRR1).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) _GLOBAL(isa300_idle_stop_noloss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	mtspr 	SPRN_PSSCR,r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	PPC_STOP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	li	r3,0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	blr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  * Desired PSSCR in r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * GPRs may be lost, so they are saved here. Wakeup is by interrupt only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * The SRESET wakeup returns to this function's caller by calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * idle_return_gpr_loss with r3 set to desired return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * A wakeup without GPR loss may alteratively be handled as in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * isa300_idle_stop_noloss and blr directly, as an optimisation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * The caller is responsible for saving/restoring SPRs, MSR, timebase,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  * etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) _GLOBAL(isa300_idle_stop_mayloss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	mtspr 	SPRN_PSSCR,r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	std	r1,PACAR1(r13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	mflr	r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	mfcr	r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	 * Use the stack red zone rather than a new frame for saving regs since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	 * in the case of no GPR loss the wakeup code branches directly back to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	 * the caller without deallocating the stack frame first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	std	r2,-8*1(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	std	r14,-8*2(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	std	r15,-8*3(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	std	r16,-8*4(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	std	r17,-8*5(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	std	r18,-8*6(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	std	r19,-8*7(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	std	r20,-8*8(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	std	r21,-8*9(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	std	r22,-8*10(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	std	r23,-8*11(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	std	r24,-8*12(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	std	r25,-8*13(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	std	r26,-8*14(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	std	r27,-8*15(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	std	r28,-8*16(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	std	r29,-8*17(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	std	r30,-8*18(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	std	r31,-8*19(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	std	r4,-8*20(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	std	r5,-8*21(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	/* 168 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	PPC_STOP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	b	.	/* catch bugs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  * Desired return value in r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * The idle wakeup SRESET interrupt can call this after calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  * to return to the idle sleep function caller with r3 as the return code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * This must not be used if idle was entered via a _noloss function (use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  * a simple blr instead).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) _GLOBAL(idle_return_gpr_loss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	ld	r1,PACAR1(r13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	ld	r4,-8*20(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	ld	r5,-8*21(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	mtlr	r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	mtcr	r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	 * KVM nap requires r2 to be saved, rather than just restoring it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	 * from PACATOC. This could be avoided for that less common case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	 * if KVM saved its r2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	ld	r2,-8*1(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	ld	r14,-8*2(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ld	r15,-8*3(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	ld	r16,-8*4(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	ld	r17,-8*5(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	ld	r18,-8*6(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	ld	r19,-8*7(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	ld	r20,-8*8(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	ld	r21,-8*9(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	ld	r22,-8*10(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	ld	r23,-8*11(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	ld	r24,-8*12(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	ld	r25,-8*13(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	ld	r26,-8*14(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	ld	r27,-8*15(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	ld	r28,-8*16(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	ld	r29,-8*17(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	ld	r30,-8*18(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	ld	r31,-8*19(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	blr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)  * This is the sequence required to execute idle instructions, as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  * specified in ISA v2.07 (and earlier). MSR[IR] and MSR[DR] must be 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)  * We have to store a GPR somewhere, ptesync, then reload it, and create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  * a false dependency on the result of the load. It doesn't matter which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  * GPR we store, or where we store it. We have already stored r2 to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)  * stack at -8(r1) in isa206_idle_insn_mayloss, so use that.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define IDLE_STATE_ENTER_SEQ_NORET(IDLE_INST)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	/* Magic NAP/SLEEP/WINKLE mode enter sequence */	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	std	r2,-8(r1);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	ptesync;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	ld	r2,-8(r1);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 236:	cmpd	cr0,r2,r2;					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	bne	236b;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	IDLE_INST;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	b	.	/* catch bugs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)  * Desired instruction type in r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)  * GPRs may be lost, so they are saved here. Wakeup is by interrupt only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)  * The SRESET wakeup returns to this function's caller by calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  * idle_return_gpr_loss with r3 set to desired return value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)  * A wakeup without GPR loss may alteratively be handled as in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  * isa300_idle_stop_noloss and blr directly, as an optimisation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)  * The caller is responsible for saving/restoring SPRs, MSR, timebase,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)  * etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)  * This must be called in real-mode (MSR_IDLE).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) _GLOBAL(isa206_idle_insn_mayloss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	std	r1,PACAR1(r13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	mflr	r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	mfcr	r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	 * Use the stack red zone rather than a new frame for saving regs since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	 * in the case of no GPR loss the wakeup code branches directly back to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	 * the caller without deallocating the stack frame first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	std	r2,-8*1(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	std	r14,-8*2(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	std	r15,-8*3(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	std	r16,-8*4(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	std	r17,-8*5(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	std	r18,-8*6(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	std	r19,-8*7(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	std	r20,-8*8(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	std	r21,-8*9(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	std	r22,-8*10(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	std	r23,-8*11(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	std	r24,-8*12(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	std	r25,-8*13(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	std	r26,-8*14(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	std	r27,-8*15(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	std	r28,-8*16(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	std	r29,-8*17(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	std	r30,-8*18(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	std	r31,-8*19(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	std	r4,-8*20(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	std	r5,-8*21(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	cmpwi	r3,PNV_THREAD_NAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	bne	1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	IDLE_STATE_ENTER_SEQ_NORET(PPC_NAP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 1:	cmpwi	r3,PNV_THREAD_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	bne	2f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	IDLE_STATE_ENTER_SEQ_NORET(PPC_SLEEP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 2:	IDLE_STATE_ENTER_SEQ_NORET(PPC_WINKLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) #ifdef CONFIG_PPC_970_NAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) _GLOBAL(power4_idle_nap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	LOAD_REG_IMMEDIATE(r7, MSR_KERNEL|MSR_EE|MSR_POW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	ld	r9,PACA_THREAD_INFO(r13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	ld	r8,TI_LOCAL_FLAGS(r9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	ori	r8,r8,_TLF_NAPPING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	std	r8,TI_LOCAL_FLAGS(r9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	 * NAPPING bit is set, from this point onward power4_fixup_nap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	 * will cause exceptions to return to power4_idle_nap_return.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 1:	sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	isync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	mtmsrd	r7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	isync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	b	1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #endif