arm/mach-rpc/ecard-loader.S

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  *  linux/arch/arm/lib/ecard.S
0004  *
0005  *  Copyright (C) 1995, 1996 Russell King
0006  *
0007  * 27/03/03 Ian Molton Clean up CONFIG_CPU
0008  */
0009 #include <linux/linkage.h>
0010 #include <asm/assembler.h>
0011
0012 #define CPSR2SPSR(rt) \
0013         mrs rt, cpsr; \
0014         msr spsr_cxsf, rt
0015
0016 @ Purpose: call an expansion card loader to read bytes.
0017 @ Proto  : char read_loader(int offset, char *card_base, char *loader);
0018 @ Returns: byte read
0019
0020 ENTRY(ecard_loader_read)
0021         stmfd   sp!, {r4 - r12, lr}
0022         mov r11, r1
0023         mov r1, r0
0024         CPSR2SPSR(r0)
0025         mov lr, pc
0026         mov pc, r2
0027         ldmfd   sp!, {r4 - r12, pc}
0028
0029 @ Purpose: call an expansion card loader to reset the card
0030 @ Proto  : void read_loader(int card_base, char *loader);
0031 @ Returns: byte read
0032
0033 ENTRY(ecard_loader_reset)
0034         stmfd   sp!, {r4 - r12, lr}
0035         mov r11, r0
0036         CPSR2SPSR(r0)
0037         mov lr, pc
0038         add pc, r1, #8
0039         ldmfd   sp!, {r4 - r12, pc}
0040