Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #ifndef __M68K_ENTRY_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #define __M68K_ENTRY_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #ifdef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Stack layout in 'ret_from_exception':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *	This allows access to the syscall arguments in registers d1-d5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *	 0(sp) - d1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *	 4(sp) - d2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *	 8(sp) - d3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *	 C(sp) - d4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *	10(sp) - d5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *	14(sp) - a0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  *	18(sp) - a1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *	1C(sp) - a2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  *	20(sp) - d0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *	24(sp) - orig_d0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  *	28(sp) - stack adjustment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  *	2C(sp) - [ sr              ] [ format & vector ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *	2E(sp) - [ pc-hiword       ] [ sr              ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  *	30(sp) - [ pc-loword       ] [ pc-hiword       ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  *	32(sp) - [ format & vector ] [ pc-loword       ]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  *		  ^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^^^^^^^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  *			M68K		  COLDFIRE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) /* the following macro is used when enabling interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #if defined(MACH_ATARI_ONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	/* block out HSYNC = ipl 2 on the atari */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define ALLOWINT	(~0x500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	/* portable version */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define ALLOWINT	(~0x700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #endif /* machine compilation types */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #ifdef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * This defines the normal kernel pt-regs layout.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  * regs a3-a6 and d6-d7 are preserved by C code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  * the kernel doesn't mess with usp unless it needs to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define SWITCH_STACK_SIZE	(6*4+4)	/* includes return address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) #ifdef CONFIG_COLDFIRE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) #ifdef CONFIG_COLDFIRE_SW_A7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * This is made a little more tricky on older ColdFires. There is no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  * separate supervisor and user stack pointers. Need to artificially
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  * construct a usp in software... When doing this we need to disable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * interrupts, otherwise bad things will happen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) .globl sw_usp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) .globl sw_ksp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) .macro SAVE_ALL_SYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	move	#0x2700,%sr		/* disable intrs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	btst	#5,%sp@(2)		/* from user? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	bnes	6f			/* no, skip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	movel	%sp,sw_usp		/* save user sp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	addql	#8,sw_usp		/* remove exception */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	movel	sw_ksp,%sp		/* kernel sp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	subql	#8,%sp			/* room for exception */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	clrl	%sp@-			/* stkadj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	movel	%d0,%sp@-		/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	movel	%d0,%sp@-		/* d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	lea	%sp@(-32),%sp		/* space for 8 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	moveml	%d1-%d5/%a0-%a2,%sp@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	movel	sw_usp,%a0		/* get usp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	movel	%a0@-,%sp@(PT_OFF_PC)	/* copy exception program counter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	movel	%a0@-,%sp@(PT_OFF_FORMATVEC)/*copy exception format/vector/sr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	bra	7f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	clrl	%sp@-			/* stkadj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	movel	%d0,%sp@-		/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	movel	%d0,%sp@-		/* d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	lea	%sp@(-32),%sp		/* space for 8 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	moveml	%d1-%d5/%a0-%a2,%sp@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	7:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) .macro SAVE_ALL_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	SAVE_ALL_SYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	moveq	#-1,%d0			/* not system call entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	movel	%d0,%sp@(PT_OFF_ORIG_D0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) .macro RESTORE_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	move	#0x2700,%sr		/* disable intrs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	movel	sw_usp,%a0		/* get usp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	movel	%sp@(PT_OFF_PC),%a0@-	/* copy exception program counter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	movel	%sp@(PT_OFF_FORMATVEC),%a0@-/*copy exception format/vector/sr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	moveml	%sp@,%d1-%d5/%a0-%a2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	lea	%sp@(32),%sp		/* space for 8 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	movel	%sp@+,%d0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	addql	#4,%sp			/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	addl	%sp@+,%sp		/* stkadj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	addql	#8,%sp			/* remove exception */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	movel	%sp,sw_ksp		/* save ksp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	subql	#8,sw_usp		/* set exception */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	movel	sw_usp,%sp		/* restore usp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	rte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .macro RDUSP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	movel	sw_usp,%a3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .macro WRUSP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	movel	%a3,sw_usp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #else /* !CONFIG_COLDFIRE_SW_A7 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  * Modern ColdFire parts have separate supervisor and user stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)  * pointers. Simple load and restore macros for this case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .macro SAVE_ALL_SYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	move	#0x2700,%sr		/* disable intrs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	clrl	%sp@-			/* stkadj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	movel	%d0,%sp@-		/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	movel	%d0,%sp@-		/* d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	lea	%sp@(-32),%sp		/* space for 8 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	moveml	%d1-%d5/%a0-%a2,%sp@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .macro SAVE_ALL_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	move	#0x2700,%sr		/* disable intrs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	clrl	%sp@-			/* stkadj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	pea	-1:w			/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	movel	%d0,%sp@-		/* d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	lea	%sp@(-32),%sp		/* space for 8 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	moveml	%d1-%d5/%a0-%a2,%sp@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .macro RESTORE_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	moveml	%sp@,%d1-%d5/%a0-%a2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	lea	%sp@(32),%sp		/* space for 8 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	movel	%sp@+,%d0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	addql	#4,%sp			/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	addl	%sp@+,%sp		/* stkadj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	rte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .macro RDUSP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	/*move	%usp,%a3*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	.word	0x4e6b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) .macro WRUSP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/*move	%a3,%usp*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	.word	0x4e63
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #endif /* !CONFIG_COLDFIRE_SW_A7 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .macro SAVE_SWITCH_STACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	lea	%sp@(-24),%sp		/* 6 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	moveml	%a3-%a6/%d6-%d7,%sp@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) .macro RESTORE_SWITCH_STACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	moveml	%sp@,%a3-%a6/%d6-%d7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	lea	%sp@(24),%sp		/* 6 regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #else /* !CONFIG_COLDFIRE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  * All other types of m68k parts (68000, 680x0, CPU32) have the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  * entry and exit code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  * a -1 in the orig_d0 field signifies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  * that the stack frame is NOT for syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .macro SAVE_ALL_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	clrl	%sp@-			/* stk_adj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	pea	-1:w			/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	movel	%d0,%sp@-		/* d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	moveml	%d1-%d5/%a0-%a2,%sp@-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .macro SAVE_ALL_SYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	clrl	%sp@-			/* stk_adj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	movel	%d0,%sp@-		/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	movel	%d0,%sp@-		/* d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	moveml	%d1-%d5/%a0-%a2,%sp@-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) .macro RESTORE_ALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	moveml	%sp@+,%a0-%a2/%d1-%d5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	movel	%sp@+,%d0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	addql	#4,%sp			/* orig d0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	addl	%sp@+,%sp		/* stk adj */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	rte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) .macro SAVE_SWITCH_STACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	moveml	%a3-%a6/%d6-%d7,%sp@-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) .macro RESTORE_SWITCH_STACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	moveml	%sp@+,%a3-%a6/%d6-%d7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #endif /* !CONFIG_COLDFIRE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)  * Register %a2 is reserved and set to current task on MMU enabled systems.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)  * Non-MMU systems do not reserve %a2 in this way, and this definition is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)  * not used for them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #ifdef CONFIG_MMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) #define curptr a2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) #define GET_CURRENT(tmp) get_current tmp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) .macro get_current reg=%d0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	movel	%sp,\reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	andl	#-THREAD_SIZE,\reg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	movel	\reg,%curptr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	movel	%curptr@,%curptr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) #define GET_CURRENT(tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) #endif /* CONFIG_MMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) #else /* C source */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) #define STR(X) STR1(X)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) #define STR1(X) #X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #define SAVE_ALL_INT				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	"clrl	%%sp@-;"    /* stk_adj */	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	"pea	-1:w;"	    /* orig d0 = -1 */	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	"movel	%%d0,%%sp@-;" /* d0 */		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	"moveml	%%d1-%%d5/%%a0-%%a2,%%sp@-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) #define GET_CURRENT(tmp) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	"movel	%%sp,"#tmp"\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	"andw	#-"STR(THREAD_SIZE)","#tmp"\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	"movel	"#tmp",%%a2\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	"movel	%%a2@,%%a2"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) #endif /* __M68K_ENTRY_H */