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)  *  linux/arch/arm/lib/csumpartialcopyuser.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *  Copyright (C) 1995-1998 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * 27/03/03 Ian Molton Clean up CONFIG_CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/assembler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/asm-offsets.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		.text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #ifdef CONFIG_CPU_SW_DOMAIN_PAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		.macro	save_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		mrc	p15, 0, ip, c3, c0, 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		stmfd	sp!, {r1, r2, r4 - r8, ip, lr}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		uaccess_enable ip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		.macro	load_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		ldmfd	sp!, {r1, r2, r4 - r8, ip, lr}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		mcr	p15, 0, ip, c3, c0, 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		ret	lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		.macro	save_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		stmfd	sp!, {r1, r2, r4 - r8, lr}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		.macro	load_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		ldmfd	sp!, {r1, r2, r4 - r8, pc}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		.macro	load1b,	reg1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		ldrusr	\reg1, r0, 1
^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	load2b, reg1, reg2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		ldrusr	\reg1, r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		ldrusr	\reg2, r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		.macro	load1l, reg1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		ldrusr	\reg1, r0, 4
^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) 		.macro	load2l, reg1, reg2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		ldrusr	\reg1, r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		ldrusr	\reg2, r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		.macro	load4l, reg1, reg2, reg3, reg4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		ldrusr	\reg1, r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		ldrusr	\reg2, r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		ldrusr	\reg3, r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 		ldrusr	\reg4, r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		.endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)  * unsigned int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)  * csum_partial_copy_from_user(const char *src, char *dst, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)  *  r0 = src, r1 = dst, r2 = len
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)  *  Returns : r0 = checksum or 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define FN_ENTRY	ENTRY(csum_partial_copy_from_user)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define FN_EXIT		ENDPROC(csum_partial_copy_from_user)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #include "csumpartialcopygeneric.S"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)  * We report fault by returning 0 csum - impossible in normal case, since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)  * we start with 0xffffffff for initial sum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 		.pushsection .text.fixup,"ax"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 		.align	4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 9001:		mov	r0, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 		load_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 		.popsection