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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Co-processor register definitions for PKUnity SoC and UniCore ISA
4 *
5 * Copyright (C) 2001-2012 GUAN Xue-tao
6 */
7#ifndef __UNICORE_HWDEF_COPRO_H__
8#define __UNICORE_HWDEF_COPRO_H__
9
10/*
11 * Control Register bits (CP#0 CR1)
12 */
13#define CR_M (1 << 0) /* MMU enable */
14#define CR_A (1 << 1) /* Alignment abort enable */
15#define CR_D (1 << 2) /* Dcache enable */
16#define CR_I (1 << 3) /* Icache enable */
17#define CR_B (1 << 4) /* Dcache write mechanism: write back */
18#define CR_T (1 << 5) /* Burst enable */
19#define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */
20
21#ifndef __ASSEMBLY__
22
23#define vectors_high() (cr_alignment & CR_V)
24
25extern unsigned long cr_no_alignment; /* defined in entry.S */
26extern unsigned long cr_alignment; /* defined in entry.S */
27
28static inline unsigned int get_cr(void)
29{
30 unsigned int val;
31 asm("movc %0, p0.c1, #0" : "=r" (val) : : "cc");
32 return val;
33}
34
35static inline void set_cr(unsigned int val)
36{
37 asm volatile("movc p0.c1, %0, #0" : : "r" (val) : "cc");
38 isb();
39}
40
41extern void adjust_cr(unsigned long mask, unsigned long set);
42
43#endif /* __ASSEMBLY__ */
44
45#endif /* __UNICORE_HWDEF_COPRO_H__ */