Orange Pi5 kernel

^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)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *   Copyright 2009-2014 Intel Corporation; author H. Peter Anvin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * ----------------------------------------------------------------------- */
^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)  * "Glove box" for BIOS calls.  Avoids the constant problems with BIOSes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * touching registers they shouldn't be.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	.code16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	.section ".inittext","ax"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	.globl	intcall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	.type	intcall, @function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) intcall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	/* Self-modify the INT instruction.  Ugly, but works. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	cmpb	%al, 3f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	je	1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	movb	%al, 3f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	jmp	1f		/* Synchronize pipeline */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	/* Save state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	pushfl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	pushw	%fs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	pushw	%gs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	pushal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	/* Copy input state to stack frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	subw	$44, %sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	movw	%dx, %si
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	movw	%sp, %di
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	movw	$11, %cx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	rep; movsd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	/* Pop full state from the stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	popal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	popw	%gs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	popw	%fs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	popw	%es
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	popw	%ds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	popfl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	/* Actual INT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	.byte	0xcd		/* INT opcode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 3:	.byte	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	/* Push full state to the stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	pushfl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	pushw	%ds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	pushw	%es
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	pushw	%fs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	pushw	%gs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	pushal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	/* Re-establish C environment invariants */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	cld
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	movzwl	%sp, %esp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	movw	%cs, %ax
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	movw	%ax, %ds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	movw	%ax, %es
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	/* Copy output state from stack frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	movw	68(%esp), %di	/* Original %cx == 3rd argument */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	andw	%di, %di
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	jz	4f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	movw	%sp, %si
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	movw	$11, %cx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	rep; movsd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 4:	addw	$44, %sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	/* Restore state and return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	popal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	popw	%gs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	popw	%fs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	popfl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	retl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	.size	intcall, .-intcall