mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
dd7c983e78
If ICACHE_INS is not supported, we use IPI to sync icache on each core. But ftrace_modify_code is called from stop_machine from default implementation of arch_ftrace_update_code and stop_machine callback is irq_disabled. When you call ipi with irq_disabled, a deadlock will happen. We couldn't use icache_flush with irq_disabled, but startup make_nop is specific case and it needn't ipi other cores. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/mm.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/barrier.h>
|
|
|
|
/* for L1-cache */
|
|
#define INS_CACHE (1 << 0)
|
|
#define DATA_CACHE (1 << 1)
|
|
#define CACHE_INV (1 << 4)
|
|
#define CACHE_CLR (1 << 5)
|
|
#define CACHE_OMS (1 << 6)
|
|
|
|
void local_icache_inv_all(void *priv)
|
|
{
|
|
mtcr("cr17", INS_CACHE|CACHE_INV);
|
|
sync_is();
|
|
}
|
|
|
|
#ifdef CONFIG_CPU_HAS_ICACHE_INS
|
|
void icache_inv_range(unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long i = start & ~(L1_CACHE_BYTES - 1);
|
|
|
|
for (; i < end; i += L1_CACHE_BYTES)
|
|
asm volatile("icache.iva %0\n"::"r"(i):"memory");
|
|
sync_is();
|
|
}
|
|
#else
|
|
struct cache_range {
|
|
unsigned long start;
|
|
unsigned long end;
|
|
};
|
|
|
|
static DEFINE_SPINLOCK(cache_lock);
|
|
|
|
static inline void cache_op_line(unsigned long i, unsigned int val)
|
|
{
|
|
mtcr("cr22", i);
|
|
mtcr("cr17", val);
|
|
}
|
|
|
|
void local_icache_inv_range(void *priv)
|
|
{
|
|
struct cache_range *param = priv;
|
|
unsigned long i = param->start & ~(L1_CACHE_BYTES - 1);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cache_lock, flags);
|
|
|
|
for (; i < param->end; i += L1_CACHE_BYTES)
|
|
cache_op_line(i, INS_CACHE | CACHE_INV | CACHE_OMS);
|
|
|
|
spin_unlock_irqrestore(&cache_lock, flags);
|
|
|
|
sync_is();
|
|
}
|
|
|
|
void icache_inv_range(unsigned long start, unsigned long end)
|
|
{
|
|
struct cache_range param = { start, end };
|
|
|
|
if (irqs_disabled())
|
|
local_icache_inv_range(¶m);
|
|
else
|
|
on_each_cpu(local_icache_inv_range, ¶m, 1);
|
|
}
|
|
#endif
|
|
|
|
inline void dcache_wb_line(unsigned long start)
|
|
{
|
|
asm volatile("dcache.cval1 %0\n"::"r"(start):"memory");
|
|
sync_is();
|
|
}
|
|
|
|
void dcache_wb_range(unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long i = start & ~(L1_CACHE_BYTES - 1);
|
|
|
|
for (; i < end; i += L1_CACHE_BYTES)
|
|
asm volatile("dcache.cval1 %0\n"::"r"(i):"memory");
|
|
sync_is();
|
|
}
|
|
|
|
void cache_wbinv_range(unsigned long start, unsigned long end)
|
|
{
|
|
dcache_wb_range(start, end);
|
|
icache_inv_range(start, end);
|
|
}
|
|
EXPORT_SYMBOL(cache_wbinv_range);
|
|
|
|
void dma_wbinv_range(unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long i = start & ~(L1_CACHE_BYTES - 1);
|
|
|
|
for (; i < end; i += L1_CACHE_BYTES)
|
|
asm volatile("dcache.civa %0\n"::"r"(i):"memory");
|
|
sync_is();
|
|
}
|
|
|
|
void dma_inv_range(unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long i = start & ~(L1_CACHE_BYTES - 1);
|
|
|
|
for (; i < end; i += L1_CACHE_BYTES)
|
|
asm volatile("dcache.iva %0\n"::"r"(i):"memory");
|
|
sync_is();
|
|
}
|
|
|
|
void dma_wb_range(unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long i = start & ~(L1_CACHE_BYTES - 1);
|
|
|
|
for (; i < end; i += L1_CACHE_BYTES)
|
|
asm volatile("dcache.cva %0\n"::"r"(i):"memory");
|
|
sync_is();
|
|
}
|