The Loongson-1A CPU is similar with Loongson-1B/1C, which is a 32-bit SoC.
It implements the MIPS32 release 2 instruction set.
It's a cost-effective single chip system based on LS232 processor core, and
is applicable to fields such as industrial control.
Signed-off-by: Binbin Zhou <zhoubb@xxxxxxxxxx>
Signed-off-by: HuaCai Chen <chenhc@xxxxxxxxxx>
---
arch/mips/include/asm/cpu-type.h | 3 ++-
arch/mips/kernel/cpu-probe.c | 4 +++-
arch/mips/loongson32/Platform | 1 +
arch/mips/loongson32/common/setup.c | 4 +++-
arch/mips/mm/c-r4k.c | 10 ++++++++++
5 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/arch/mips/include/asm/cpu-type.h b/arch/mips/include/asm/cpu-type.h
index 175fe56..2202be8 100644
--- a/arch/mips/include/asm/cpu-type.h
+++ b/arch/mips/include/asm/cpu-type.h
@@ -24,7 +24,8 @@ static inline int __pure __get_cpu_type(const int cpu_type)
case CPU_LOONGSON3:
#endif
-#if defined(CONFIG_SYS_HAS_CPU_LOONGSON1B) || \
+#if defined(CONFIG_SYS_HAS_CPU_LOONGSON1A) || \
+ defined(CONFIG_SYS_HAS_CPU_LOONGSON1B) || \
defined(CONFIG_SYS_HAS_CPU_LOONGSON1C)
case CPU_LOONGSON1:
#endif
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 25f729c..c23fa20 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1514,7 +1514,9 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
switch (c->processor_id & PRID_REV_MASK) {
case PRID_REV_LOONGSON1ABC:
-#ifdef CONFIG_CPU_LOONGSON1B
+#if defined(CONFIG_LOONGSON1_LS1A)
+ __cpu_name[cpu] = "Loongson 1A";
+#elif defined(CONFIG_CPU_LOONGSON1B)
__cpu_name[cpu] = "Loongson 1B";
#endif
break;
diff --git a/arch/mips/loongson32/Platform b/arch/mips/loongson32/Platform
index ffe01c6..a9e0fa7 100644
--- a/arch/mips/loongson32/Platform
+++ b/arch/mips/loongson32/Platform
@@ -4,5 +4,6 @@ cflags-$(CONFIG_CPU_LOONGSON1) += \
platform-$(CONFIG_MACH_LOONGSON32) += loongson32/
cflags-$(CONFIG_MACH_LOONGSON32) += -I$(srctree)/arch/mips/include/asm/mach-loongson32
+load-$(CONFIG_LOONGSON1_LS1A) += 0xffffffff80200000
load-$(CONFIG_LOONGSON1_LS1B) += 0xffffffff80100000
load-$(CONFIG_LOONGSON1_LS1C) += 0xffffffff80100000
diff --git a/arch/mips/loongson32/common/setup.c b/arch/mips/loongson32/common/setup.c
index c8e8b3e..1c3324a 100644
--- a/arch/mips/loongson32/common/setup.c
+++ b/arch/mips/loongson32/common/setup.c
@@ -22,7 +22,9 @@ const char *get_system_type(void)
switch (processor_id & PRID_REV_MASK) {
case PRID_REV_LOONGSON1ABC:
-#if defined(CONFIG_LOONGSON1_LS1B)
+#if defined(CONFIG_LOONGSON1_LS1A)
+ return "LOONGSON LS1A";
+#elif defined(CONFIG_LOONGSON1_LS1B)
return "LOONGSON LS1B";
#elif defined(CONFIG_LOONGSON1_LS1C)
return "LOONGSON LS1C";
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 81d6a15..567beef 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1366,6 +1366,16 @@ static void probe_pcache(void)
c->options |= MIPS_CPU_PREFETCH;
break;
+ case CPU_LOONGSON1:
+ if (read_c0_config7() & MIPS_CONF7_AR) {
+ /*
+ * effectively physically indexed dcache,
+ * thus no virtual aliases.
+ */
+ c->dcache.flags |= MIPS_CACHE_PINDEX;
+ break;
+ }
+
default:
if (!(config & MIPS_CONF_M))
panic("Don't know how to probe P-caches on this cpu.");
--
2.9.4
