xref: /openbmc/u-boot/arch/nios2/include/asm/system.h (revision e8f80a5a)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
4  * Scott McNutt <smcnutt@psyent.com>
5  */
6 #ifndef __ASM_NIOS2_SYSTEM_H_
7 #define __ASM_NIOS2_SYSTEM_H_
8 
9 #define local_irq_enable() __asm__ __volatile__ (  \
10 	"rdctl	r8, status\n"			   \
11 	"ori	r8, r8, 1\n"			   \
12 	"wrctl	status, r8\n"			   \
13 	: : : "r8")
14 
15 #define local_irq_disable() __asm__ __volatile__ ( \
16 	"rdctl	r8, status\n"			   \
17 	"andi	r8, r8, 0xfffe\n"		   \
18 	"wrctl	status, r8\n"			   \
19 	: : : "r8")
20 
21 #define local_save_flags(x) __asm__ __volatile__ (	\
22 	"rdctl	r8, status\n"				\
23 	"mov	%0, r8\n"				\
24 	: "=r" (x) : : "r8", "memory")
25 
26 #define local_irq_restore(x) __asm__ __volatile__ (	\
27 	"mov	r8, %0\n"				\
28 	"wrctl	status, r8\n"				\
29 	: : "r" (x) : "r8", "memory")
30 
31 /* For spinlocks etc */
32 #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \
33 	while (0)
34 
35 #define	irqs_disabled()					\
36 ({							\
37 	unsigned long flags;				\
38 	local_save_flags(flags);			\
39 	((flags & NIOS2_STATUS_PIE_MSK) == 0x0);	\
40 })
41 
42 /* indirect call to go beyond 256MB limitation of toolchain */
43 #define nios2_callr(addr) __asm__ __volatile__ (	\
44 	"callr	%0"					\
45 	: : "r" (addr))
46 
47 void display_sysid(void);
48 
49 #endif /* __ASM_NIOS2_SYSTEM_H */
50