Orange Pi5 kernel

^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) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <asm/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) .text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Inputs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * %esi : memory location to compare
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * %eax : low 32 bits of old value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * %edx : high 32 bits of old value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * %ebx : low 32 bits of new value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * %ecx : high 32 bits of new value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) SYM_FUNC_START(cmpxchg8b_emu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) # Emulate 'cmpxchg8b (%esi)' on UP except we don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) # set the whole ZF thing (caller will just compare
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) # eax:edx with the expected value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	pushfl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	cli
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	cmpl  (%esi), %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	jne .Lnot_same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	cmpl 4(%esi), %edx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	jne .Lhalf_same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	movl %ebx,  (%esi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	movl %ecx, 4(%esi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	popfl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	ret
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .Lnot_same:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	movl  (%esi), %eax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .Lhalf_same:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	movl 4(%esi), %edx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	popfl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	ret
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) SYM_FUNC_END(cmpxchg8b_emu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) EXPORT_SYMBOL(cmpxchg8b_emu)