openwrt-xburst/target/linux/xburst/patches-2.6.31/001-core.patch

From ac50b482e2278cdff65e67c8a31079bf9c5ae289 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Wed, 19 Aug 2009 14:47:08 +0200
Subject: [PATCH] core

---
 arch/mips/Kconfig                        |   48 +++++
 arch/mips/Makefile                       |   18 ++
 arch/mips/boot/Makefile                  |   23 ++-
 arch/mips/include/asm/bootinfo.h         |    6 +
 arch/mips/include/asm/cpu.h              |   13 ++-
 arch/mips/include/asm/mach-generic/irq.h |    2 +-
 arch/mips/include/asm/r4kcache.h         |  231 ++++++++++++++++++++++
 arch/mips/include/asm/suspend.h          |    3 +
 arch/mips/kernel/cpu-probe.c             |   21 ++
 arch/mips/kernel/signal.c                |    6 +
 arch/mips/kernel/unaligned.c             |    5 +
 arch/mips/mm/c-r4k.c                     |   30 +++
 arch/mips/mm/cache.c                     |    2 +
 arch/mips/mm/tlbex.c                     |    5 +
 include/linux/suspend.h                  |  315 ------------------------------
 15 files changed, 409 insertions(+), 319 deletions(-)
 delete mode 100644 include/linux/suspend.h

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 3ca0fe1..e8f8027 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -671,6 +671,32 @@ source "arch/mips/cavium-octeon/Kconfig"
 
 endmenu
 
+#####################################################
+# Ingenic SOC series
+#####################################################
+
+config SOC_JZ4720
+	bool
+	select JZSOC
+
+config SOC_JZ4740
+	bool
+	select JZSOC
+	select GENERIC_GPIO
+	select ARCH_REQUIRE_GPIOLIB
+	select SYS_HAS_EARLY_PRINTK
+
+config JZSOC
+	bool
+	select JZRISC
+	select SYS_HAS_CPU_MIPS32_R1
+	select SYS_SUPPORTS_32BIT_KERNEL
+
+config JZRISC
+	bool
+
+####################################################
+
 config RWSEM_GENERIC_SPINLOCK
 	bool
 	default y
@@ -1893,6 +1919,14 @@ config NR_CPUS
 
 source "kernel/time/Kconfig"
 
+# the value of (max order + 1)
+config FORCE_MAX_ZONEORDER
+	prompt "MAX_ZONEORDER"
+	int
+	default "12"
+	help
+	 The max memory that can be allocated = 4KB * 2^(CONFIG_FORCE_MAX_ZONEORDER - 1)
+
 #
 # Timer Interrupt Frequency Configuration
 #
@@ -2164,6 +2198,23 @@ config BINFMT_ELF32
 
 endmenu
 
+menu "CPU Frequency scaling"
+
+config CPU_FREQ_JZ
+	tristate "CPUfreq driver for JZ CPUs"
+	depends on JZSOC
+	default n
+	help
+	  This enables the CPUfreq driver for JZ CPUs.
+
+	  If in doubt, say N.
+
+if (CPU_FREQ_JZ)
+source "drivers/cpufreq/Kconfig"
+endif
+
+endmenu
+
 menu "Power management options"
 
 config ARCH_HIBERNATION_POSSIBLE
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 861da51..14a6f9a 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -180,6 +180,14 @@ cflags-$(CONFIG_AR7)		+= -I$(srctree)/arch/mips/include/asm/mach-ar7
 load-$(CONFIG_AR7)		+= 0xffffffff94100000
 
 #
+# Commond Ingenic JZ4740 series
+#
+
+core-$(CONFIG_SOC_JZ4740)	+= arch/mips/jz4740/
+cflags-$(CONFIG_SOC_JZ4740)	+= -I$(srctree)/arch/mips/include/asm/mach-jz4740
+load-$(CONFIG_SOC_JZ4740)	+= 0xffffffff80010000
+
+#
 # Acer PICA 61, Mips Magnum 4000 and Olivetti M700.
 #
 core-$(CONFIG_MACH_JAZZ)	+= arch/mips/jazz/
@@ -711,6 +719,12 @@ makeboot =$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) $(1)
 
 all:	$(all-y)
 
+uImage: $(vmlinux-32)
+	+@$(call makeboot,$@)
+
+zImage: $(vmlinux-32)
+	+@$(call makeboot,$@)
+
 vmlinux.bin: $(vmlinux-32)
 	+@$(call makeboot,$@)
 
@@ -740,6 +754,7 @@ install:
 
 archclean:
 	@$(MAKE) $(clean)=arch/mips/boot
+	@$(MAKE) $(clean)=arch/mips/boot/compressed
 	@$(MAKE) $(clean)=arch/mips/lasat
 
 define archhelp
@@ -747,6 +762,9 @@ define archhelp
 	echo '  vmlinux.ecoff        - ECOFF boot image'
 	echo '  vmlinux.bin          - Raw binary boot image'
 	echo '  vmlinux.srec         - SREC boot image'
+	echo  '  uImage	- u-boot format image (arch/$(ARCH)/boot/uImage)'
+	echo  '  zImage	- Compressed binary image (arch/$(ARCH)/boot/compressed/zImage)'
+	echo  '  vmlinux.bin	- Uncompressed binary image (arch/$(ARCH)/boot/vmlinux.bin)'
 	echo
 	echo '  These will be default as apropriate for a configured platform.'
 endef
diff --git a/arch/mips/boot/Makefile b/arch/mips/boot/Makefile
index 2a209d7..1cfce3e 100644
--- a/arch/mips/boot/Makefile
+++ b/arch/mips/boot/Makefile
@@ -7,6 +7,9 @@
 # Copyright (C) 2004  Maciej W. Rozycki
 #
 
+# This one must match the LOADADDR in arch/mips/Makefile!
+LOADADDR=0x80010000
+
 #
 # Some DECstations need all possible sections of an ECOFF executable
 #
@@ -25,7 +28,7 @@ strip-flags	= $(addprefix --remove-section=,$(drop-sections))
 
 VMLINUX = vmlinux
 
-all: vmlinux.ecoff vmlinux.srec addinitrd
+all: vmlinux.ecoff vmlinux.srec addinitrd uImage zImage
 
 vmlinux.ecoff: $(obj)/elf2ecoff $(VMLINUX)
 	$(obj)/elf2ecoff $(VMLINUX) vmlinux.ecoff $(E2EFLAGS)
@@ -42,8 +45,24 @@ vmlinux.srec: $(VMLINUX)
 $(obj)/addinitrd: $(obj)/addinitrd.c
 	$(HOSTCC) -o $@ $^
 
+uImage: $(VMLINUX) vmlinux.bin
+	rm -f $(obj)/vmlinux.bin.gz
+	gzip -9 $(obj)/vmlinux.bin
+	mkimage -A mips -O linux -T kernel -C gzip \
+		-a $(LOADADDR) -e $(shell sh ./$(obj)/tools/entry $(NM) $(VMLINUX) ) \
+		-n 'Linux-$(KERNELRELEASE)' \
+		-d $(obj)/vmlinux.bin.gz $(obj)/uImage
+	@echo '  Kernel: arch/mips/boot/$@ is ready'
+
+zImage:
+	$(Q)$(MAKE) $(build)=$(obj)/compressed loadaddr=$(LOADADDR) $@
+	@echo '  Kernel: arch/mips/boot/compressed/$@ is ready'
+
 clean-files += addinitrd \
 	       elf2ecoff \
 	       vmlinux.bin \
 	       vmlinux.ecoff \
-	       vmlinux.srec
+	       vmlinux.srec \
+	       vmlinux.bin.gz \
+	       uImage \
+	       zImage
diff --git a/arch/mips/include/asm/bootinfo.h b/arch/mips/include/asm/bootinfo.h
index 610fe3a..8451d28 100644
--- a/arch/mips/include/asm/bootinfo.h
+++ b/arch/mips/include/asm/bootinfo.h
@@ -57,6 +57,12 @@
 #define	MACH_MIKROTIK_RB532	0	/* Mikrotik RouterBoard 532 	*/
 #define MACH_MIKROTIK_RB532A	1	/* Mikrotik RouterBoard 532A 	*/
 
+/*
+ * Valid machtype for group INGENIC
+ */
+#define  MACH_INGENIC_JZ4720	0	/* JZ4730 SOC		*/
+#define  MACH_INGENIC_JZ4740	1	/* JZ4740 SOC		*/
+
 #define CL_SIZE			COMMAND_LINE_SIZE
 
 extern char *system_type;
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 3bdc0e3..904c574 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -34,7 +34,7 @@
 #define PRID_COMP_LSI		0x080000
 #define PRID_COMP_LEXRA		0x0b0000
 #define PRID_COMP_CAVIUM	0x0d0000
-
+#define PRID_COMP_INGENIC	0xd00000
 
 /*
  * Assigned values for the product ID register.  In order to detect a
@@ -127,6 +127,12 @@
 #define PRID_IMP_CAVIUM_CN52XX 0x0700
 
 /*
+ * These are the PRID's for when 23:16 == PRID_COMP_INGENIC
+ */
+
+#define PRID_IMP_JZRISC        0x0200
+
+/*
  * Definitions for 7:0 on legacy processors
  */
 
@@ -217,6 +223,11 @@ enum cpu_type_enum {
 	CPU_5KC, CPU_20KC, CPU_25KF, CPU_SB1, CPU_SB1A, CPU_LOONGSON2,
 	CPU_CAVIUM_OCTEON,
 
+	/*
+	 * Ingenic class processors
+	 */
+	CPU_JZRISC, CPU_XBURST,
+
 	CPU_LAST
 };
 
diff --git a/arch/mips/include/asm/mach-generic/irq.h b/arch/mips/include/asm/mach-generic/irq.h
index 70d9a25..73b7a83 100644
--- a/arch/mips/include/asm/mach-generic/irq.h
+++ b/arch/mips/include/asm/mach-generic/irq.h
@@ -9,7 +9,7 @@
 #define __ASM_MACH_GENERIC_IRQ_H
 
 #ifndef NR_IRQS
-#define NR_IRQS	128
+#define NR_IRQS	256
 #endif
 
 #ifdef CONFIG_I8259
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index 387bf59..b500056 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -17,6 +17,58 @@
 #include <asm/cpu-features.h>
 #include <asm/mipsmtregs.h>
 
+#ifdef CONFIG_JZRISC
+
+#define K0_TO_K1()				\
+do {						\
+	unsigned long __k0_addr;		\
+						\
+	__asm__ __volatile__(			\
+	"la %0, 1f\n\t"				\
+	"or	%0, %0, %1\n\t"			\
+	"jr	%0\n\t"				\
+	"nop\n\t"				\
+	"1: nop\n"				\
+	: "=&r"(__k0_addr)			\
+	: "r" (0x20000000) );			\
+} while(0)
+
+#define K1_TO_K0()				\
+do {						\
+	unsigned long __k0_addr;		\
+	__asm__ __volatile__(			\
+	"nop;nop;nop;nop;nop;nop;nop\n\t"	\
+	"la %0, 1f\n\t"				\
+	"jr	%0\n\t"				\
+	"nop\n\t"				\
+	"1:	nop\n"				\
+	: "=&r" (__k0_addr));			\
+} while (0)
+
+#define INVALIDATE_BTB()			\
+do {						\
+	unsigned long tmp;			\
+	__asm__ __volatile__(			\
+	".set mips32\n\t"			\
+	"mfc0 %0, $16, 7\n\t"			\
+	"nop\n\t"				\
+	"ori %0, 2\n\t"				\
+	"mtc0 %0, $16, 7\n\t"			\
+	"nop\n\t"				\
+	: "=&r" (tmp));				\
+} while (0)
+
+#define SYNC_WB() __asm__ __volatile__ ("sync")
+
+#else /* CONFIG_JZRISC */
+
+#define K0_TO_K1() do { } while (0)
+#define K1_TO_K0() do { } while (0)
+#define INVALIDATE_BTB() do { } while (0)
+#define SYNC_WB() do { } while (0)
+
+#endif /* CONFIG_JZRISC */
+
 /*
  * This macro return a properly sign-extended address suitable as base address
  * for indexed cache operations.  Two issues here:
@@ -144,6 +196,7 @@ static inline void flush_icache_line_indexed(unsigned long addr)
 {
 	__iflush_prologue
 	cache_op(Index_Invalidate_I, addr);
+	INVALIDATE_BTB();
 	__iflush_epilogue
 }
 
@@ -151,6 +204,7 @@ static inline void flush_dcache_line_indexed(unsigned long addr)
 {
 	__dflush_prologue
 	cache_op(Index_Writeback_Inv_D, addr);
+	SYNC_WB();
 	__dflush_epilogue
 }
 
@@ -163,6 +217,7 @@ static inline void flush_icache_line(unsigned long addr)
 {
 	__iflush_prologue
 	cache_op(Hit_Invalidate_I, addr);
+	INVALIDATE_BTB();
 	__iflush_epilogue
 }
 
@@ -170,6 +225,7 @@ static inline void flush_dcache_line(unsigned long addr)
 {
 	__dflush_prologue
 	cache_op(Hit_Writeback_Inv_D, addr);
+	SYNC_WB();
 	__dflush_epilogue
 }
 
@@ -177,6 +233,7 @@ static inline void invalidate_dcache_line(unsigned long addr)
 {
 	__dflush_prologue
 	cache_op(Hit_Invalidate_D, addr);
+	SYNC_WB();
 	__dflush_epilogue
 }
 
@@ -209,6 +266,7 @@ static inline void flush_scache_line(unsigned long addr)
 static inline void protected_flush_icache_line(unsigned long addr)
 {
 	protected_cache_op(Hit_Invalidate_I, addr);
+	INVALIDATE_BTB();
 }
 
 /*
@@ -220,6 +278,7 @@ static inline void protected_flush_icache_line(unsigned long addr)
 static inline void protected_writeback_dcache_line(unsigned long addr)
 {
 	protected_cache_op(Hit_Writeback_Inv_D, addr);
+	SYNC_WB();
 }
 
 static inline void protected_writeback_scache_line(unsigned long addr)
@@ -396,8 +455,10 @@ static inline void blast_##pfx##cache##lsize##_page_indexed(unsigned long page)
 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 16)
 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 16)
 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 16)
+#ifndef CONFIG_JZRISC
 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 32)
 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 32)
+#endif
 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32)
 __BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64)
 __BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64)
@@ -405,12 +466,122 @@ __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64)
 __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128)
 
 __BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16)
+#ifndef CONFIG_JZRISC
 __BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 32)
+#endif
 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 16)
 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 32)
 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 64)
 __BUILD_BLAST_CACHE(inv_s, scache, Index_Writeback_Inv_SD, Hit_Invalidate_SD, 128)
 
+#ifdef CONFIG_JZRISC
+
+static inline void blast_dcache32(void)
+{
+	unsigned long start = INDEX_BASE;
+	unsigned long end = start + current_cpu_data.dcache.waysize;
+	unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
+	unsigned long ws_end = current_cpu_data.dcache.ways <<
+	                       current_cpu_data.dcache.waybit;
+	unsigned long ws, addr;
+
+	for (ws = 0; ws < ws_end; ws += ws_inc)
+		for (addr = start; addr < end; addr += 0x400)
+			cache32_unroll32(addr|ws,Index_Writeback_Inv_D);
+
+	SYNC_WB();
+}
+
+static inline void blast_dcache32_page(unsigned long page)
+{
+	unsigned long start = page;
+	unsigned long end = page + PAGE_SIZE;
+
+	do {
+		cache32_unroll32(start,Hit_Writeback_Inv_D);
+		start += 0x400;
+	} while (start < end);
+
+	SYNC_WB();
+}
+
+static inline void blast_dcache32_page_indexed(unsigned long page)
+{
+	unsigned long indexmask = current_cpu_data.dcache.waysize - 1;
+	unsigned long start = INDEX_BASE + (page & indexmask);
+	unsigned long end = start + PAGE_SIZE;
+	unsigned long ws_inc = 1UL << current_cpu_data.dcache.waybit;
+	unsigned long ws_end = current_cpu_data.dcache.ways <<
+	                       current_cpu_data.dcache.waybit;
+	unsigned long ws, addr;
+
+	for (ws = 0; ws < ws_end; ws += ws_inc)
+		for (addr = start; addr < end; addr += 0x400)
+			cache32_unroll32(addr|ws,Index_Writeback_Inv_D);
+
+	SYNC_WB();
+}
+
+static inline void blast_icache32(void)
+{
+	unsigned long start = INDEX_BASE;
+	unsigned long end = start + current_cpu_data.icache.waysize;
+	unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit;
+	unsigned long ws_end = current_cpu_data.icache.ways <<
+	                       current_cpu_data.icache.waybit;
+	unsigned long ws, addr;
+
+	K0_TO_K1();
+
+	for (ws = 0; ws < ws_end; ws += ws_inc)
+		for (addr = start; addr < end; addr += 0x400)
+			cache32_unroll32(addr|ws,Index_Invalidate_I);
+
+	INVALIDATE_BTB();
+
+	K1_TO_K0();
+}
+
+static inline void blast_icache32_page(unsigned long page)
+{
+	unsigned long start = page;
+	unsigned long end = page + PAGE_SIZE;
+
+	K0_TO_K1();
+
+	do {
+		cache32_unroll32(start,Hit_Invalidate_I);
+		start += 0x400;
+	} while (start < end);
+
+	INVALIDATE_BTB();
+
+	K1_TO_K0();
+}
+
+static inline void blast_icache32_page_indexed(unsigned long page)
+{
+	unsigned long indexmask = current_cpu_data.icache.waysize - 1;
+	unsigned long start = INDEX_BASE + (page & indexmask);
+	unsigned long end = start + PAGE_SIZE;
+	unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit;
+	unsigned long ws_end = current_cpu_data.icache.ways <<
+	                       current_cpu_data.icache.waybit;
+	unsigned long ws, addr;
+
+	K0_TO_K1();
+
+	for (ws = 0; ws < ws_end; ws += ws_inc)
+		for (addr = start; addr < end; addr += 0x400)
+			cache32_unroll32(addr|ws,Index_Invalidate_I);
+
+	INVALIDATE_BTB();
+
+	K1_TO_K0();
+}
+
+#endif /* CONFIG_JZRISC */
+
 /* build blast_xxx_range, protected_blast_xxx_range */
 #define __BUILD_BLAST_CACHE_RANGE(pfx, desc, hitop, prot) \
 static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
@@ -432,13 +603,73 @@ static inline void prot##blast_##pfx##cache##_range(unsigned long start, \
 	__##pfx##flush_epilogue						\
 }
 
+#ifndef CONFIG_JZRISC
 __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, protected_)
+#endif
 __BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, protected_)
+#ifndef CONFIG_JZRISC
 __BUILD_BLAST_CACHE_RANGE(i, icache, Hit_Invalidate_I, protected_)
 __BUILD_BLAST_CACHE_RANGE(d, dcache, Hit_Writeback_Inv_D, )
+#endif
 __BUILD_BLAST_CACHE_RANGE(s, scache, Hit_Writeback_Inv_SD, )
 /* blast_inv_dcache_range */
 __BUILD_BLAST_CACHE_RANGE(inv_d, dcache, Hit_Invalidate_D, )
 __BUILD_BLAST_CACHE_RANGE(inv_s, scache, Hit_Invalidate_SD, )
 
+#ifdef CONFIG_JZRISC
+
+static inline void protected_blast_dcache_range(unsigned long start,
+						unsigned long end)
+{
+	unsigned long lsize = cpu_dcache_line_size();
+	unsigned long addr = start & ~(lsize - 1);
+	unsigned long aend = (end - 1) & ~(lsize - 1);
+
+	while (1) {
+		protected_cache_op(Hit_Writeback_Inv_D, addr);
+		if (addr == aend)
+			break;
+		addr += lsize;
+	}
+	SYNC_WB();
+}
+
+static inline void protected_blast_icache_range(unsigned long start,
+						unsigned long end)
+{
+	unsigned long lsize = cpu_icache_line_size();
+	unsigned long addr = start & ~(lsize - 1);
+	unsigned long aend = (end - 1) & ~(lsize - 1);
+
+	K0_TO_K1();
+
+	while (1) {
+		protected_cache_op(Hit_Invalidate_I, addr);
+		if (addr == aend)
+			break;
+		addr += lsize;
+	}
+	INVALIDATE_BTB();
+
+	K1_TO_K0();
+}
+
+static inline void blast_dcache_range(unsigned long start,
+				      unsigned long end)
+{
+	unsigned long lsize = cpu_dcache_line_size();
+	unsigned long addr = start & ~(lsize - 1);
+	unsigned long aend = (end - 1) & ~(lsize - 1);
+
+	while (1) {
+		cache_op(Hit_Writeback_Inv_D, addr);
+		if (addr == aend)
+			break;
+		addr += lsize;
+	}
+	SYNC_WB();
+}
+
+#endif /* CONFIG_JZRISC */
+
 #endif /* _ASM_R4KCACHE_H */
diff --git a/arch/mips/include/asm/suspend.h b/arch/mips/include/asm/suspend.h
index 294cdb6..94dc597 100644
--- a/arch/mips/include/asm/suspend.h
+++ b/arch/mips/include/asm/suspend.h
@@ -2,6 +2,9 @@
 #define __ASM_SUSPEND_H
 
 static inline int arch_prepare_suspend(void) { return 0; }
+#if defined(CONFIG_PM) && defined(CONFIG_JZSOC)
+extern int jz_pm_init(void);
+#endif
 
 /* References to section boundaries */
 extern const void __nosave_begin, __nosave_end;
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 1abe990..4535ae7 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -160,6 +160,7 @@ void __init check_wait(void)
 	case CPU_PR4450:
 	case CPU_BCM3302:
 	case CPU_CAVIUM_OCTEON:
+	case CPU_JZRISC:
 		cpu_wait = r4k_wait;
 		break;
 
@@ -888,6 +889,23 @@ static inline void cpu_probe_cavium(struct cpuinfo_mips *c, unsigned int cpu)
 	}
 }
 
+static inline void cpu_probe_ingenic(struct cpuinfo_mips *c, unsigned int cpu)
+{
+	decode_configs(c);
+	c->options &= ~MIPS_CPU_COUNTER; /* JZRISC does not implement the CP0 counter. */
+	switch (c->processor_id & 0xff00) {
+	case PRID_IMP_JZRISC:
+		c->cputype = CPU_JZRISC;
+		c->isa_level = MIPS_CPU_ISA_M32R1;
+		c->tlbsize = 32;
+		__cpu_name[cpu] = "Ingenic JZRISC";
+		break;
+	default:
+		panic("Unknown Ingenic Processor ID!");
+		break;
+	}
+}
+
 const char *__cpu_name[NR_CPUS];
 
 __cpuinit void cpu_probe(void)
@@ -925,6 +943,9 @@ __cpuinit void cpu_probe(void)
 	case PRID_COMP_CAVIUM:
 		cpu_probe_cavium(c, cpu);
 		break;
+ 	case PRID_COMP_INGENIC:
+		cpu_probe_ingenic(c, cpu);
+		break;
 	}
 
 	BUG_ON(!__cpu_name[cpu]);
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index 67bd626..e26ebe0 100644
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 6721ee2..dd4b70b 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -928,6 +928,36 @@ static void __cpuinit probe_pcache(void)
 		c->dcache.waybit = 0;
 		break;
 
+	case CPU_JZRISC:
+		config1 = read_c0_config1();
+		config1 = (config1 >> 22) & 0x07;
+		if (config1 == 0x07)
+			config1 = 10;
+		else
+			config1 = config1 + 11;
+		config1 += 2;
+		icache_size = (1 << config1);
+		c->icache.linesz = 32;
+		c->icache.ways = 4;
+		c->icache.waybit = __ffs(icache_size / c->icache.ways);
+
+		config1 = read_c0_config1();
+		config1 = (config1 >> 13) & 0x07;
+		if (config1 == 0x07)
+			config1 = 10;
+		else
+			config1 = config1 + 11;
+		config1 += 2;
+		dcache_size = (1 << config1);
+		c->dcache.linesz = 32;
+		c->dcache.ways = 4;
+		c->dcache.waybit = __ffs(dcache_size / c->dcache.ways);
+
+		c->dcache.flags = 0;
+		c->options |= MIPS_CPU_PREFETCH;
+
+		break;
+
 	default:
 		if (!(config & MIPS_CONF_M))
 			panic("Don't know how to probe P-caches on this cpu.");
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 694d51f..4b2bc95 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -52,6 +52,8 @@ void (*_dma_cache_wback)(unsigned long start, unsigned long size);
 void (*_dma_cache_inv)(unsigned long start, unsigned long size);
 
 EXPORT_SYMBOL(_dma_cache_wback_inv);
+EXPORT_SYMBOL(_dma_cache_wback);
+EXPORT_SYMBOL(_dma_cache_inv);
 
 #endif /* CONFIG_DMA_NONCOHERENT */
 
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 9a17bf8..9b80053 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -385,6 +385,11 @@ static void __cpuinit build_tlb_write_entry(u32 **p, struct uasm_label **l,
 		tlbw(p);
 		break;
 
+	case CPU_JZRISC:
+		tlbw(p);
+		uasm_i_nop(p);
+		break;
+
 	default:
 		panic("No TLB refill handler yet (CPU type: %d)",
 		      current_cpu_data.cputype);
-- 
1.5.6.5