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sifive/sifive_l2_cache: Add sifive_l2_flush64_range function

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Tom 2021-01-08 02:54:51 +08:00 • committed by Emil Renner Berthing
parent e0eaabbcc5
commit 8af79592c8
3 changed files with 59 additions and 1 deletions
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15
drivers/soc/sifive/Kconfig
View file

@ -7,4 +7,19 @@ config SIFIVE_L2
help
Support for the L2 cache controller on SiFive platforms.
config SIFIVE_L2_FLUSH
bool "Support Level 2 Cache Controller Flush operation of SiFive Soc"
if SIFIVE_L2_FLUSH
config SIFIVE_L2_FLUSH_START
hex "Level 2 Cache Flush operation start"
default 0x80000000
config SIFIVE_L2_FLUSH_SIZE
hex "Level 2 Cache Flush operation size"
default 0x800000000
endif # SIFIVE_L2_FLUSH
endif

41
drivers/soc/sifive/sifive_l2_cache.c
View file

@ -29,13 +29,17 @@
#define SIFIVE_L2_DATECCFAIL_HIGH 0x164
#define SIFIVE_L2_DATECCFAIL_COUNT 0x168
#define SIFIVE_L2_FLUSH64 0x200
#define SIFIVE_L2_CONFIG 0x00
#define SIFIVE_L2_WAYENABLE 0x08
#define SIFIVE_L2_ECCINJECTERR 0x40
#define SIFIVE_L2_MAX_ECCINTR 4
static void __iomem *l2_base;
#define SIFIVE_L2_FLUSH64_LINE_LEN 64
static void __iomem *l2_base = NULL;
static int g_irq[SIFIVE_L2_MAX_ECCINTR];
static struct riscv_cacheinfo_ops l2_cache_ops;
@ -116,6 +120,41 @@ int unregister_sifive_l2_error_notifier(struct notifier_block *nb)
}
EXPORT_SYMBOL_GPL(unregister_sifive_l2_error_notifier);
#ifdef CONFIG_SIFIVE_L2_FLUSH
void sifive_l2_flush64_range(unsigned long start, unsigned long len)
{
unsigned long line;
if(!l2_base) {
pr_warn("L2CACHE: base addr invalid, skipping flush\n");
return;
}
/* TODO: if (len == 0), skipping flush or going on? */
if(!len) {
pr_debug("L2CACHE: flush64 range @ 0x%lx(len:0)\n", start);
return;
}
/* make sure the address is in the range */
if(start < CONFIG_SIFIVE_L2_FLUSH_START ||
(start + len) > (CONFIG_SIFIVE_L2_FLUSH_START +
CONFIG_SIFIVE_L2_FLUSH_SIZE)) {
pr_warn("L2CACHE: flush64 out of range: %lx(%lx), skip flush\n",
start, len);
return;
}
mb(); /* sync */
for (line = start; line < start + len;
line += SIFIVE_L2_FLUSH64_LINE_LEN) {
writeq(line, l2_base + SIFIVE_L2_FLUSH64);
mb();
}
}
EXPORT_SYMBOL_GPL(sifive_l2_flush64_range);
#endif
static int l2_largest_wayenabled(void)
{
return readl(l2_base + SIFIVE_L2_WAYENABLE) & 0xFF;

4
include/soc/sifive/sifive_l2_cache.h
View file

@ -7,6 +7,10 @@
#ifndef __SOC_SIFIVE_L2_CACHE_H
#define __SOC_SIFIVE_L2_CACHE_H
#ifdef CONFIG_SIFIVE_L2_FLUSH
extern void sifive_l2_flush64_range(unsigned long start, unsigned long len);
#endif
extern int register_sifive_l2_error_notifier(struct notifier_block *nb);
extern int unregister_sifive_l2_error_notifier(struct notifier_block *nb);