提交 006a851b 编写于 作者: S Steven J. Hill

MIPS: Add support for the 1074K core.

Signed-off-by: NSteven J. Hill <sjhill@mips.com>
上级 fea7a08a
......@@ -94,6 +94,7 @@
#define PRID_IMP_24KE 0x9600
#define PRID_IMP_74K 0x9700
#define PRID_IMP_1004K 0x9900
#define PRID_IMP_1074K 0x9a00
#define PRID_IMP_M14KC 0x9c00
/*
......
......@@ -596,6 +596,8 @@
#define MIPS_CONF4_MMUEXTDEF (_ULCAST_(3) << 14)
#define MIPS_CONF4_MMUEXTDEF_MMUSIZEEXT (_ULCAST_(1) << 14)
#define MIPS_CONF6_SYND (_ULCAST_(1) << 13)
#define MIPS_CONF7_WII (_ULCAST_(1) << 31)
#define MIPS_CONF7_RPS (_ULCAST_(1) << 2)
......
......@@ -857,6 +857,10 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
c->cputype = CPU_1004K;
__cpu_name[cpu] = "MIPS 1004Kc";
break;
case PRID_IMP_1074K:
c->cputype = CPU_74K;
__cpu_name[cpu] = "MIPS 1074Kc";
break;
}
spram_config();
......
......@@ -786,6 +786,25 @@ static inline void rm7k_erratum31(void)
}
}
static inline void alias_74k_erratum(struct cpuinfo_mips *c)
{
/*
* Early versions of the 74K do not update the cache tags on a
* vtag miss/ptag hit which can occur in the case of KSEG0/KUSEG
* aliases. In this case it is better to treat the cache as always
* having aliases.
*/
if ((c->processor_id & 0xff) <= PRID_REV_ENCODE_332(2, 4, 0))
c->dcache.flags |= MIPS_CACHE_VTAG;
if ((c->processor_id & 0xff) == PRID_REV_ENCODE_332(2, 4, 0))
write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND);
if (((c->processor_id & 0xff00) == PRID_IMP_1074K) &&
((c->processor_id & 0xff) <= PRID_REV_ENCODE_332(1, 1, 0))) {
c->dcache.flags |= MIPS_CACHE_VTAG;
write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND);
}
}
static char *way_string[] __cpuinitdata = { NULL, "direct mapped", "2-way",
"3-way", "4-way", "5-way", "6-way", "7-way", "8-way"
};
......@@ -1056,6 +1075,8 @@ static void __cpuinit probe_pcache(void)
case CPU_34K:
case CPU_74K:
case CPU_1004K:
if (c->cputype == CPU_74K)
alias_74k_erratum(c);
if ((read_c0_config7() & (1 << 16))) {
/* effectively physically indexed dcache,
thus no virtual aliases. */
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册