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 */
18 int cpu_status(u32 nr);
19 int cpu_reset(u32 nr);
20 int cpu_disable(u32 nr);
21 int cpu_release(u32 nr, int argc, char *const argv[]);
22
cpumask_next(int cpu,unsigned int mask)23 static 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
36 int cpu_numcores(void);
37 int cpu_num_dspcores(void);
38 u32 cpu_mask(void);
39 u32 cpu_dsp_mask(void);
40 int 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 */
50 int checkcpu(void);
51
52 void smp_set_core_boot_addr(unsigned long addr, int corenr);
53 void smp_kick_all_cpus(void);
54
55 int icache_status(void);
56 void icache_enable(void);
57 void icache_disable(void);
58 int dcache_status(void);
59 void dcache_enable(void);
60 void dcache_disable(void);
61 void mmu_disable(void);
62
63 /* arch/$(ARCH)/lib/cache.c */
64 void enable_caches(void);
65 void flush_cache(unsigned long addr, unsigned long size);
66 void flush_dcache_all(void);
67 void flush_dcache_range(unsigned long start, unsigned long stop);
68 void invalidate_dcache_range(unsigned long start, unsigned long stop);
69 void invalidate_dcache_all(void);
70 void invalidate_icache_all(void);
71
72 enum {
73 /* Disable caches (else flush caches but leave them active) */
74 CBL_DISABLE_CACHES = 1 << 0,
75 CBL_SHOW_BOOTSTAGE_REPORT = 1 << 1,
76
77 CBL_ALL = 3,
78 };
79
80 /**
81 * Clean up ready for linux
82 *
83 * @param flags Flags to control what is done
84 */
85 int cleanup_before_linux_select(int flags);
86
87 void reset_cpu(void);
88
89 #endif
90