jcs.org
"Das U-Boot" Source Tree
1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * (C) Copyright 2000-2009
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Copyright 2019 Google LLC
6 */
7
8#ifndef __CPU_LEGACY_H
9#define __CPU_LEGACY_H
10
11#include <linux/types.h>
12
13/*
14 * Multicore arch functions
15 *
16 * These should be moved to use the CPU uclass.
17 */
18int cpu_status(u32 nr);
19int cpu_reset(u32 nr);
20int cpu_disable(u32 nr);
21int cpu_release(u32 nr, int argc, char *const argv[]);
22
23static inline int cpumask_next(int cpu, unsigned int mask)
24{
25 for (cpu++; !((1 << cpu) & mask); cpu++)
26 ;
27
28 return cpu;
29}
30
31#define for_each_cpu(iter, cpu, num_cpus, mask) \
32 for (iter = 0, cpu = cpumask_next(-1, mask); \
33 iter < num_cpus; \
34 iter++, cpu = cpumask_next(cpu, mask)) \
35
36int cpu_numcores(void);
37int cpu_num_dspcores(void);
38u32 cpu_mask(void);
39u32 cpu_dsp_mask(void);
40int is_core_valid(unsigned int core);
41
42/**
43 * checkcpu() - perform an early check of the CPU
44 *
45 * This is used on PowerPC, SH and X86 machines as a CPU init mechanism. It is
46 * called during the pre-relocation init sequence in board_init_f().
47 *
48 * Return: 0 if oK, -ve on error
49 */
50int checkcpu(void);
51
52void smp_set_core_boot_addr(unsigned long addr, int corenr);
53void smp_kick_all_cpus(void);
54
55int icache_status(void);
56void icache_enable(void);
57void icache_disable(void);
58int dcache_status(void);
59void dcache_enable(void);
60void dcache_disable(void);
61void mmu_disable(void);
62int mmu_status(void);
63
64/* arch/$(ARCH)/lib/cache.c */
65void enable_caches(void);
66void flush_cache(unsigned long addr, unsigned long size);
67void flush_dcache_all(void);
68void flush_dcache_range(unsigned long start, unsigned long stop);
69void invalidate_dcache_range(unsigned long start, unsigned long stop);
70void invalidate_dcache_all(void);
71void invalidate_icache_all(void);
72
73enum pgprot_attrs {
74 MMU_ATTR_RO,
75 MMU_ATTR_RX,
76 MMU_ATTR_RW,
77};
78
79/** pgprot_set_attrs() - Set page table permissions
80 *
81 * @addr: Physical address start
82 * @size: size of memory to change
83 * @perm: New permissions
84 *
85 * Return: 0 on success, error otherwise.
86 **/
87int pgprot_set_attrs(phys_addr_t addr, size_t size, enum pgprot_attrs perm);
88
89/**
90 * noncached_init() - Initialize non-cached memory region
91 *
92 * Initialize non-cached memory area. This memory region will be typically
93 * located right below the malloc() area and mapped uncached in the MMU.
94 *
95 * It is called during the generic post-relocation init sequence.
96 *
97 * Return: 0 if OK
98 */
99int noncached_init(void);
100void noncached_set_region(void);
101
102phys_addr_t noncached_alloc(size_t size, size_t align);
103
104enum {
105 /* Disable caches (else flush caches but leave them active) */
106 CBL_DISABLE_CACHES = 1 << 0,
107 CBL_SHOW_BOOTSTAGE_REPORT = 1 << 1,
108
109 CBL_ALL = 3,
110};
111
112/**
113 * Clean up ready for linux
114 *
115 * @param flags Flags to control what is done
116 */
117int cleanup_before_linux_select(int flags);
118
119void reset_cpu(void);
120
121#endif