mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
35b65dd8ef
Historically, the reset_cpu() function had an `addr` parameter which was
meant to pass in an address of the reset vector location, where the CPU
should reset to. This feature is no longer used anywhere in U-Boot as
all reset_cpu() implementations now ignore the passed value. Generic
code has been added which always calls reset_cpu() with `0` which means
this feature can no longer be used easily anyway.
Over time, many implementations seem to have "misunderstood" the
existence of this parameter as a way to customize/parameterize the reset
(e.g. COLD vs WARM resets). As this is not properly supported, the
code will almost always not do what it is intended to (because all
call-sites just call reset_cpu() with 0).
To avoid confusion and to clean up the codebase from unused left-overs
of the past, remove the `addr` parameter entirely. Code which intends
to support different kinds of resets should be rewritten as a sysreset
driver instead.
This transformation was done with the following coccinelle patch:
@@
expression argvalue;
@@
- reset_cpu(argvalue)
+ reset_cpu()
@@
identifier argname;
type argtype;
@@
- reset_cpu(argtype argname)
+ reset_cpu(void)
{ ... }
Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
89 lines
2 KiB
C
89 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* (C) Copyright 2000-2009
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
* Copyright 2019 Google LLC
|
|
*/
|
|
|
|
#ifndef __CPU_LEGACY_H
|
|
#define __CPU_LEGACY_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* Multicore arch functions
|
|
*
|
|
* These should be moved to use the CPU uclass.
|
|
*/
|
|
int cpu_status(u32 nr);
|
|
int cpu_reset(u32 nr);
|
|
int cpu_disable(u32 nr);
|
|
int cpu_release(u32 nr, int argc, char *const argv[]);
|
|
|
|
static inline int cpumask_next(int cpu, unsigned int mask)
|
|
{
|
|
for (cpu++; !((1 << cpu) & mask); cpu++)
|
|
;
|
|
|
|
return cpu;
|
|
}
|
|
|
|
#define for_each_cpu(iter, cpu, num_cpus, mask) \
|
|
for (iter = 0, cpu = cpumask_next(-1, mask); \
|
|
iter < num_cpus; \
|
|
iter++, cpu = cpumask_next(cpu, mask)) \
|
|
|
|
int cpu_numcores(void);
|
|
int cpu_num_dspcores(void);
|
|
u32 cpu_mask(void);
|
|
u32 cpu_dsp_mask(void);
|
|
int is_core_valid(unsigned int core);
|
|
|
|
/**
|
|
* checkcpu() - perform an early check of the CPU
|
|
*
|
|
* This is used on PowerPC, SH and X86 machines as a CPU init mechanism. It is
|
|
* called during the pre-relocation init sequence in board_init_f().
|
|
*
|
|
* @return 0 if oK, -ve on error
|
|
*/
|
|
int checkcpu(void);
|
|
|
|
void smp_set_core_boot_addr(unsigned long addr, int corenr);
|
|
void smp_kick_all_cpus(void);
|
|
|
|
int icache_status(void);
|
|
void icache_enable(void);
|
|
void icache_disable(void);
|
|
int dcache_status(void);
|
|
void dcache_enable(void);
|
|
void dcache_disable(void);
|
|
void mmu_disable(void);
|
|
|
|
/* arch/$(ARCH)/lib/cache.c */
|
|
void enable_caches(void);
|
|
void flush_cache(unsigned long addr, unsigned long size);
|
|
void flush_dcache_all(void);
|
|
void flush_dcache_range(unsigned long start, unsigned long stop);
|
|
void invalidate_dcache_range(unsigned long start, unsigned long stop);
|
|
void invalidate_dcache_all(void);
|
|
void invalidate_icache_all(void);
|
|
|
|
enum {
|
|
/* Disable caches (else flush caches but leave them active) */
|
|
CBL_DISABLE_CACHES = 1 << 0,
|
|
CBL_SHOW_BOOTSTAGE_REPORT = 1 << 1,
|
|
|
|
CBL_ALL = 3,
|
|
};
|
|
|
|
/**
|
|
* Clean up ready for linux
|
|
*
|
|
* @param flags Flags to control what is done
|
|
*/
|
|
int cleanup_before_linux_select(int flags);
|
|
|
|
void reset_cpu(void);
|
|
|
|
#endif
|