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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * locks.S: SMP low-level lock primitives on Sparc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 1998 Anton Blanchard (anton@progsoc.uts.edu.au)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 1998 Jakub Jelinek   (jj@ultra.linux.cz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/psr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	.text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	.align	4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	/* Read/writer locks, as usual this is overly clever to make it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	 * as fast as possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	/* caches... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) ___rw_read_enter_spin_on_wlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	orcc	%g2, 0x0, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	be,a	___rw_read_enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	 ldstub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	b	___rw_read_enter_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	 ldub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) ___rw_read_try_spin_on_wlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	andcc	%g2, 0xff, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	be,a	___rw_read_try
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	 ldstub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	xnorcc	%g2, 0x0, %o0	/* if g2 is ~0, set o0 to 0 and bugger off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	bne,a	___rw_read_enter_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	 ld	[%g1], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	retl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	 mov	%g4, %o7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) ___rw_read_exit_spin_on_wlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	orcc	%g2, 0x0, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	be,a	___rw_read_exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	 ldstub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	b	___rw_read_exit_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	 ldub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) ___rw_write_enter_spin_on_wlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	orcc	%g2, 0x0, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	be,a	___rw_write_enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	 ldstub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	b	___rw_write_enter_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	 ld	[%g1], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	.globl	___rw_read_enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) EXPORT_SYMBOL(___rw_read_enter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ___rw_read_enter:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	orcc	%g2, 0x0, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	bne,a	___rw_read_enter_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	 ldub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	ld	[%g1], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	add	%g2, 1, %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	st	%g2, [%g1]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	retl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	 mov	%g4, %o7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	.globl	___rw_read_exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) EXPORT_SYMBOL(___rw_read_exit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) ___rw_read_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	orcc	%g2, 0x0, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	bne,a	___rw_read_exit_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	 ldub	[%g1 + 3], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	ld	[%g1], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	sub	%g2, 0x1ff, %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	st	%g2, [%g1]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	retl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	 mov	%g4, %o7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	.globl	___rw_read_try
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) EXPORT_SYMBOL(___rw_read_try)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ___rw_read_try:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	orcc	%g2, 0x0, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	bne	___rw_read_try_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	 ld	[%g1], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	add	%g2, 1, %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 	st	%g2, [%g1]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 	set	1, %o1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	retl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	 mov	%g4, %o7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	.globl	___rw_write_enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) EXPORT_SYMBOL(___rw_write_enter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ___rw_write_enter:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 	orcc	%g2, 0x0, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 	bne	___rw_write_enter_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 	 ld	[%g1], %g2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) 	andncc	%g2, 0xff, %g0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) 	bne,a	___rw_write_enter_spin_on_wlock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) 	 stb	%g0, [%g1 + 3]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) 	retl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) 	 mov	%g4, %o7