ecard-loader.S

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  linux/arch/arm/lib/ecard.S
 4 *
 5 *  Copyright (C) 1995, 1996 Russell King
 6 *
 7 * 27/03/03 Ian Molton Clean up CONFIG_CPU
 8 */
 9#include <linux/linkage.h>
10#include <asm/assembler.h>
11
12#define CPSR2SPSR(rt) \
13		mrs	rt, cpsr; \
14		msr	spsr_cxsf, rt
15
16@ Purpose: call an expansion card loader to read bytes.
17@ Proto  : char read_loader(int offset, char *card_base, char *loader);
18@ Returns: byte read
19
20ENTRY(ecard_loader_read)
21		stmfd	sp!, {r4 - r12, lr}
22		mov	r11, r1
23		mov	r1, r0
24		CPSR2SPSR(r0)
25		mov	lr, pc
26		mov	pc, r2
27		ldmfd	sp!, {r4 - r12, pc}
28
29@ Purpose: call an expansion card loader to reset the card
30@ Proto  : void read_loader(int card_base, char *loader);
31@ Returns: byte read
32
33ENTRY(ecard_loader_reset)
34		stmfd	sp!, {r4 - r12, lr}
35		mov	r11, r0
36		CPSR2SPSR(r0)
37		mov	lr, pc
38		add	pc, r1, #8
39		ldmfd	sp!, {r4 - r12, pc}
40