[MIPS] define Hit_Invalidate_I to Index_Invalidate_I for loongson2
Signed-off-by: Fuxin Zhang <zhangfx@lemote.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 624c31c..c8d954d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -894,6 +894,16 @@
prompt "CPU type"
default CPU_R4X00
+config CPU_LOONGSON2
+ bool "Loongson 2"
+ depends on SYS_HAS_CPU_LOONGSON2
+ select CPU_SUPPORTS_32BIT_KERNEL
+ select CPU_SUPPORTS_64BIT_KERNEL
+ select CPU_SUPPORTS_HIGHMEM
+ help
+ The Loongson 2E processor implements the MIPS III instruction set
+ with many extensions.
+
config CPU_MIPS32_R1
bool "MIPS32 Release 1"
depends on SYS_HAS_CPU_MIPS32_R1
@@ -1104,6 +1114,9 @@
endchoice
+config SYS_HAS_CPU_LOONGSON2
+ bool
+
config SYS_HAS_CPU_MIPS32_R1
bool
@@ -1438,6 +1451,15 @@
config CPU_HAS_WB
bool
+config 64BIT_CONTEXT
+ bool "Save 64bit integer registers"
+ depends on 32BIT && CPU_LOONGSON2
+ help
+ Loongson2 CPU is 64bit , when used in 32BIT mode, its integer
+ registers can still be accessed as 64bit, mainly for multimedia
+ instructions. We must have all 64bit save/restored to make sure
+ those instructions to get correct result.
+
#
# Vectored interrupt mode is an R2 feature
#
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index fc09769b..1e4579c 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -118,6 +118,7 @@
cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
+cflags-$(CONFIG_CPU_LOONGSON2) += -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
-Wa,-mips32 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index bb25dd8..73983ee 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -14,14 +14,15 @@
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_MODULES) += mips_ksyms.o module.o
+obj-$(CONFIG_CPU_LOONGSON2) += r4k_fpu.o r4k_switch.o
+obj-$(CONFIG_CPU_MIPS32) += r4k_fpu.o r4k_switch.o
+obj-$(CONFIG_CPU_MIPS64) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R3000) += r2300_fpu.o r2300_switch.o
-obj-$(CONFIG_CPU_TX39XX) += r2300_fpu.o r2300_switch.o
-obj-$(CONFIG_CPU_TX49XX) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R4000) += r4k_fpu.o r4k_switch.o
-obj-$(CONFIG_CPU_VR41XX) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R4300) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R4X00) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R5000) += r4k_fpu.o r4k_switch.o
+obj-$(CONFIG_CPU_R6000) += r6000_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R5432) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R8000) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_RM7000) += r4k_fpu.o r4k_switch.o
@@ -29,9 +30,9 @@
obj-$(CONFIG_CPU_NEVADA) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_R10000) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_CPU_SB1) += r4k_fpu.o r4k_switch.o
-obj-$(CONFIG_CPU_MIPS32) += r4k_fpu.o r4k_switch.o
-obj-$(CONFIG_CPU_MIPS64) += r4k_fpu.o r4k_switch.o
-obj-$(CONFIG_CPU_R6000) += r6000_fpu.o r4k_switch.o
+obj-$(CONFIG_CPU_TX39XX) += r2300_fpu.o r2300_switch.o
+obj-$(CONFIG_CPU_TX49XX) += r4k_fpu.o r4k_switch.o
+obj-$(CONFIG_CPU_VR41XX) += r4k_fpu.o r4k_switch.o
obj-$(CONFIG_SMP) += smp.o
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 27fc184..23d8a3b7 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -485,6 +485,14 @@
MIPS_CPU_LLSC;
c->tlbsize = 64;
break;
+ case PRID_IMP_LOONGSON2:
+ c->cputype = CPU_LOONGSON2;
+ c->isa_level = MIPS_CPU_ISA_III;
+ c->options = R4K_OPTS |
+ MIPS_CPU_FPU | MIPS_CPU_LLSC |
+ MIPS_CPU_32FPR;
+ c->tlbsize = 64;
+ break;
}
}
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index eb7730d..ec04f5a 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -83,6 +83,7 @@
[CPU_VR4181A] = "NEC VR4181A",
[CPU_SR71000] = "Sandcraft SR71000",
[CPU_PR4450] = "Philips PR4450",
+ [CPU_LOONGSON2] = "ICT Loongson-2",
};
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 1a484e4..91ed1eb 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -8,6 +8,7 @@
obj-y += iomap.o
obj-$(CONFIG_PCI) += iomap-pci.o
+obj-$(CONFIG_CPU_LOONGSON2) += dump_tlb.o
obj-$(CONFIG_CPU_MIPS32) += dump_tlb.o
obj-$(CONFIG_CPU_MIPS64) += dump_tlb.o
obj-$(CONFIG_CPU_NEVADA) += dump_tlb.o
diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile
index 293697b..19a0e54 100644
--- a/arch/mips/mm/Makefile
+++ b/arch/mips/mm/Makefile
@@ -9,6 +9,7 @@
obj-$(CONFIG_64BIT) += pgtable-64.o
obj-$(CONFIG_HIGHMEM) += highmem.o
+obj-$(CONFIG_CPU_LOONGSON2) += c-r4k.o cex-gen.o pg-r4k.o tlb-r4k.o
obj-$(CONFIG_CPU_MIPS32) += c-r4k.o cex-gen.o pg-r4k.o tlb-r4k.o
obj-$(CONFIG_CPU_MIPS64) += c-r4k.o cex-gen.o pg-r4k.o tlb-r4k.o
obj-$(CONFIG_CPU_NEVADA) += c-r4k.o cex-gen.o pg-r4k.o tlb-r4k.o
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index df04a31..be96231 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -335,6 +335,10 @@
static inline void local_r4k___flush_cache_all(void * args)
{
+#if defined(CONFIG_CPU_LOONGSON2)
+ r4k_blast_scache();
+ return;
+#endif
r4k_blast_dcache();
r4k_blast_icache();
@@ -848,6 +852,24 @@
c->options |= MIPS_CPU_PREFETCH;
break;
+ case CPU_LOONGSON2:
+ icache_size = 1 << (12 + ((config & CONF_IC) >> 9));
+ c->icache.linesz = 16 << ((config & CONF_IB) >> 5);
+ if (prid & 0x3)
+ c->icache.ways = 4;
+ else
+ c->icache.ways = 2;
+ c->icache.waybit = 0;
+
+ dcache_size = 1 << (12 + ((config & CONF_DC) >> 6));
+ c->dcache.linesz = 16 << ((config & CONF_DB) >> 4);
+ if (prid & 0x3)
+ c->dcache.ways = 4;
+ else
+ c->dcache.ways = 2;
+ c->dcache.waybit = 0;
+ break;
+
default:
if (!(config & MIPS_CONF_M))
panic("Don't know how to probe P-caches on this cpu.");
@@ -963,6 +985,14 @@
break;
}
+#ifdef CONFIG_CPU_LOONGSON2
+ /*
+ * LOONGSON2 has 4 way icache, but when using indexed cache op,
+ * one op will act on all 4 ways
+ */
+ c->icache.ways = 1;
+#endif
+
printk("Primary instruction cache %ldkB, %s, %s, linesize %d bytes.\n",
icache_size >> 10,
cpu_has_vtag_icache ? "virtually tagged" : "physically tagged",
@@ -1036,6 +1066,24 @@
return 1;
}
+#if defined(CONFIG_CPU_LOONGSON2)
+static void __init loongson2_sc_init(void)
+{
+ struct cpuinfo_mips *c = ¤t_cpu_data;
+
+ scache_size = 512*1024;
+ c->scache.linesz = 32;
+ c->scache.ways = 4;
+ c->scache.waybit = 0;
+ c->scache.waysize = scache_size / (c->scache.ways);
+ c->scache.sets = scache_size / (c->scache.linesz * c->scache.ways);
+ pr_info("Unified secondary cache %ldkB %s, linesize %d bytes.\n",
+ scache_size >> 10, way_string[c->scache.ways], c->scache.linesz);
+
+ c->options |= MIPS_CPU_INCLUSIVE_CACHES;
+}
+#endif
+
extern int r5k_sc_init(void);
extern int rm7k_sc_init(void);
extern int mips_sc_init(void);
@@ -1085,6 +1133,12 @@
#endif
return;
+#if defined(CONFIG_CPU_LOONGSON2)
+ case CPU_LOONGSON2:
+ loongson2_sc_init();
+ return;
+#endif
+
default:
if (c->isa_level == MIPS_CPU_ISA_M32R1 ||
c->isa_level == MIPS_CPU_ISA_M32R2 ||
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 65160d4..dcd6913 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -48,6 +48,22 @@
#endif /* CONFIG_MIPS_MT_SMTC */
+#if defined(CONFIG_CPU_LOONGSON2)
+/*
+ * LOONGSON2 has a 4 entry itlb which is a subset of dtlb,
+ * unfortrunately, itlb is not totally transparent to software.
+ */
+#define FLUSH_ITLB write_c0_diag(4);
+
+#define FLUSH_ITLB_VM(vma) { if ((vma)->vm_flags & VM_EXEC) write_c0_diag(4); }
+
+#else
+
+#define FLUSH_ITLB
+#define FLUSH_ITLB_VM(vma)
+
+#endif
+
void local_flush_tlb_all(void)
{
unsigned long flags;
@@ -73,6 +89,7 @@
}
tlbw_use_hazard();
write_c0_entryhi(old_ctx);
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
@@ -136,6 +153,7 @@
} else {
drop_mmu_context(mm, cpu);
}
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
}
@@ -178,6 +196,7 @@
} else {
local_flush_tlb_all();
}
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
@@ -210,6 +229,7 @@
finish:
write_c0_entryhi(oldpid);
+ FLUSH_ITLB_VM(vma);
EXIT_CRITICAL(flags);
}
}
@@ -241,7 +261,7 @@
tlbw_use_hazard();
}
write_c0_entryhi(oldpid);
-
+ FLUSH_ITLB;
EXIT_CRITICAL(flags);
}
@@ -293,6 +313,7 @@
else
tlb_write_indexed();
tlbw_use_hazard();
+ FLUSH_ITLB_VM(vma);
EXIT_CRITICAL(flags);
}
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index e714929..4ec0964 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -893,6 +893,7 @@
case CPU_4KSC:
case CPU_20KC:
case CPU_25KF:
+ case CPU_LOONGSON2:
tlbw(p);
break;
@@ -1276,7 +1277,8 @@
* need three, with the second nop'ed and the third being
* unused.
*/
-#ifdef CONFIG_32BIT
+ /* Loongson2 ebase is different than r4k, we have more space */
+#if defined(CONFIG_32BIT) || defined(CONFIG_CPU_LOONGSON2)
if ((p - tlb_handler) > 64)
panic("TLB refill handler space exceeded");
#else
@@ -1289,7 +1291,7 @@
/*
* Now fold the handler in the TLB refill handler space.
*/
-#ifdef CONFIG_32BIT
+#if defined(CONFIG_32BIT) || defined(CONFIG_CPU_LOONGSON2)
f = final_handler;
/* Simplest case, just copy the handler. */
copy_handler(relocs, labels, tlb_handler, p, f);
@@ -1336,7 +1338,7 @@
final_len);
f = final_handler;
-#ifdef CONFIG_64BIT
+#if defined(CONFIG_64BIT) && !defined(CONFIG_CPU_LOONGSON2)
if (final_len > 32)
final_len = 64;
else
