1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2007 Michal Simek
4 *
5 * Michal SIMEK <monstr@monstr.eu>
6 */
7
8#include <cpu_func.h>
9#include <asm/asm.h>
10#include <asm/cache.h>
11#include <asm/cpuinfo.h>
12#include <asm/global_data.h>
13
14DECLARE_GLOBAL_DATA_PTR;
15
16static void __invalidate_icache(ulong addr, ulong size)
17{
18	if (CONFIG_IS_ENABLED(XILINX_MICROBLAZE0_USE_WIC)) {
19		for (int i = 0; i < size;
20		     i += gd_cpuinfo()->icache_line_length) {
21			asm volatile (
22				"wic	%0, r0;"
23				"nop;"
24				:
25				: "r" (addr + i)
26				: "memory");
27		}
28	}
29}
30
31void invalidate_icache_all(void)
32{
33	__invalidate_icache(0, gd_cpuinfo()->icache_size);
34}
35
36static void __flush_dcache(ulong addr, ulong size)
37{
38	if (CONFIG_IS_ENABLED(XILINX_MICROBLAZE0_USE_WDC)) {
39		for (int i = 0; i < size;
40		     i += gd_cpuinfo()->dcache_line_length) {
41			asm volatile (
42				"wdc.flush	%0, r0;"
43				"nop;"
44				:
45				: "r" (addr + i)
46				: "memory");
47		}
48	}
49}
50
51void flush_dcache_range(unsigned long start, unsigned long end)
52{
53	if (start >= end) {
54		debug("Invalid dcache range - start: 0x%08lx end: 0x%08lx\n",
55		      start, end);
56		return;
57	}
58
59	__flush_dcache(start, end - start);
60}
61
62void flush_dcache_all(void)
63{
64	__flush_dcache(0, gd_cpuinfo()->dcache_size);
65}
66
67int dcache_status(void)
68{
69	int i = 0;
70	int mask = 0x80;
71	__asm__ __volatile__ ("mfs %0,rmsr"::"r" (i):"memory");
72	/* i&=0x80 */
73	__asm__ __volatile__ ("and %0,%0,%1"::"r" (i), "r" (mask):"memory");
74	return i;
75}
76
77int icache_status(void)
78{
79	int i = 0;
80	int mask = 0x20;
81	__asm__ __volatile__ ("mfs %0,rmsr"::"r" (i):"memory");
82	/* i&=0x20 */
83	__asm__ __volatile__ ("and %0,%0,%1"::"r" (i), "r" (mask):"memory");
84	return i;
85}
86
87void icache_enable(void)
88{
89	MSRSET(0x20);
90}
91
92void icache_disable(void)
93{
94	invalidate_icache_all();
95
96	MSRCLR(0x20);
97}
98
99void dcache_enable(void)
100{
101	MSRSET(0x80);
102}
103
104void dcache_disable(void)
105{
106	flush_dcache_all();
107
108	MSRCLR(0x80);
109}
110
111void flush_cache(ulong addr, ulong size)
112{
113	__invalidate_icache(addr, size);
114	__flush_dcache(addr, size);
115}
116
117void flush_cache_all(void)
118{
119	invalidate_icache_all();
120	flush_dcache_all();
121}
122