Commit 38f2e377 authored by Chao Xie's avatar Chao Xie Committed by Haojian Zhuang

ARM: cache: add extra feature enable for tauros2

The extra feature may be used by SOCs are prefetch, burst8,
write buffer coalesce
Signed-off-by: default avatarChao Xie <xiechao.mail@gmail.com>
Signed-off-by: default avatarHaojian Zhuang <haojian.zhuang@gmail.com>
parent fa79b8d6
......@@ -8,4 +8,7 @@
* warranty of any kind, whether express or implied.
*/
extern void __init tauros2_init(void);
#define CACHE_TAUROS2_PREFETCH_ON (1 << 0)
#define CACHE_TAUROS2_LINEFILL_BURST8 (1 << 1)
extern void __init tauros2_init(unsigned int features);
......@@ -145,21 +145,6 @@ static inline void __init write_extra_features(u32 u)
__asm__("mcr p15, 1, %0, c15, c1, 0" : : "r" (u));
}
static void __init disable_l2_prefetch(void)
{
u32 u;
/*
* Read the CPU Extra Features register and verify that the
* Disable L2 Prefetch bit is set.
*/
u = read_extra_features();
if (!(u & 0x01000000)) {
printk(KERN_INFO "Tauros2: Disabling L2 prefetch.\n");
write_extra_features(u | 0x01000000);
}
}
static inline int __init cpuid_scheme(void)
{
return !!((processor_id & 0x000f0000) == 0x000f0000);
......@@ -188,11 +173,36 @@ static inline void __init write_actlr(u32 actlr)
__asm__("mcr p15, 0, %0, c1, c0, 1\n" : : "r" (actlr));
}
void __init tauros2_init(void)
static void enable_extra_feature(unsigned int features)
{
u32 u;
u = read_extra_features();
if (features & CACHE_TAUROS2_PREFETCH_ON)
u &= ~0x01000000;
else
u |= 0x01000000;
printk(KERN_INFO "Tauros2: %s L2 prefetch.\n",
(features & CACHE_TAUROS2_PREFETCH_ON)
? "Enabling" : "Disabling");
if (features & CACHE_TAUROS2_LINEFILL_BURST8)
u |= 0x00100000;
else
u &= ~0x00100000;
printk(KERN_INFO "Tauros2: %s line fill burt8.\n",
(features & CACHE_TAUROS2_LINEFILL_BURST8)
? "Enabling" : "Disabling");
write_extra_features(u);
}
void __init tauros2_init(unsigned int features)
{
char *mode = NULL;
disable_l2_prefetch();
enable_extra_feature(features);
#ifdef CONFIG_CPU_32v5
if ((processor_id & 0xff0f0000) == 0x56050000) {
......
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