Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  CHAR: Delete old and now unused M48T35 RTC driver for SGI IP27.
  CHAR: Delete old and now unused DS1286 driver.
  MIPS: Sort out CPU type to name translation.
  MIPS: Use the new byteorder headers
  MIPS: Probe for watch registers on cores of all vendors, not just MTI.
  MIPS: Switch FPU emulator trap to BREAK instruction.
  MIPS: SMP: Do not initialize __cpu_number_map/__cpu_logical_map for CPU 0.
  MIPS: Consider value of c0_ebase when computing value of exception base.
  MIPS: Clean up MIPSxx-optimized bitop functions
  MIPS: New feature test macro cpu_has_mips_r
  MIPS: RBTX4927: Add GPIO-LED support
  MIPS: TXx9: Fix RBTX4939 ethernet address initialization

arch/mips/Kconfig

@@ -327,7 +327,6 @@ config SGI_IP22
 	select IP22_CPU_SCACHE
 	select IRQ_CPU
 	select GENERIC_ISA_DMA_SUPPORT_BROKEN
-	select SGI_HAS_DS1286
 	select SGI_HAS_I8042
 	select SGI_HAS_INDYDOG
 	select SGI_HAS_HAL2
@@ -382,7 +381,6 @@ config SGI_IP28
 	select HW_HAS_EISA
 	select I8253
 	select I8259
-	select SGI_HAS_DS1286
 	select SGI_HAS_I8042
 	select SGI_HAS_INDYDOG
 	select SGI_HAS_HAL2
@@ -893,9 +891,6 @@ config EMMA2RH
 config SERIAL_RM9000
 	bool
 
-config SGI_HAS_DS1286
-	bool
-
 config SGI_HAS_INDYDOG
 	bool
 

arch/mips/configs/ip22_defconfig

@@ -771,7 +771,6 @@ CONFIG_WATCHDOG=y
 CONFIG_INDYDOG=m
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
-CONFIG_SGI_DS1286=m
 # CONFIG_R3964 is not set
 CONFIG_RAW_DRIVER=m
 CONFIG_MAX_RAW_DEVS=256

arch/mips/configs/ip27_defconfig

@@ -701,7 +701,6 @@ CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_WATCHDOG is not set
 CONFIG_HW_RANDOM=m
 # CONFIG_RTC is not set
-CONFIG_SGI_IP27_RTC=y
 # CONFIG_R3964 is not set
 # CONFIG_APPLICOM is not set
 # CONFIG_DRM is not set

arch/mips/configs/ip28_defconfig

@@ -70,7 +70,6 @@ CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_SYS_SUPPORTS_BIG_ENDIAN=y
 CONFIG_IRQ_CPU=y
 CONFIG_SWAP_IO_SPACE=y
-CONFIG_SGI_HAS_DS1286=y
 CONFIG_SGI_HAS_INDYDOG=y
 CONFIG_SGI_HAS_SEEQ=y
 CONFIG_SGI_HAS_WD93=y
@@ -585,7 +584,6 @@ CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
-CONFIG_SGI_DS1286=y
 # CONFIG_DTLK is not set
 # CONFIG_R3964 is not set
 # CONFIG_RAW_DRIVER is not set

arch/mips/include/asm/bitops.h

@@ -558,39 +558,67 @@ static inline void __clear_bit_unlock(unsigned long nr, volatile unsigned long *
 	__clear_bit(nr, addr);
 }
 
-#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
-
 /*
  * Return the bit position (0..63) of the most significant 1 bit in a word
  * Returns -1 if no 1 bit exists
  */
-static inline unsigned long __fls(unsigned long x)
+static inline unsigned long __fls(unsigned long word)
 {
-	int lz;
+	int num;
 
-	if (sizeof(x) == 4) {
+	if (BITS_PER_LONG == 32 &&
+	    __builtin_constant_p(cpu_has_mips_r) && cpu_has_mips_r) {
 		__asm__(
 		"	.set	push					\n"
 		"	.set	mips32					\n"
 		"	clz	%0, %1					\n"
 		"	.set	pop					\n"
-		: "=r" (lz)
-		: "r" (x));
+		: "=r" (num)
+		: "r" (word));
 
-		return 31 - lz;
+		return 31 - num;
 	}
 
-	BUG_ON(sizeof(x) != 8);
-
+	if (BITS_PER_LONG == 64 &&
+	    __builtin_constant_p(cpu_has_mips64) && cpu_has_mips64) {
 		__asm__(
 		"	.set	push					\n"
 		"	.set	mips64					\n"
 		"	dclz	%0, %1					\n"
 		"	.set	pop					\n"
-	: "=r" (lz)
-	: "r" (x));
+		: "=r" (num)
+		: "r" (word));
+
+		return 63 - num;
+	}
 
-	return 63 - lz;
+	num = BITS_PER_LONG - 1;
+
+#if BITS_PER_LONG == 64
+	if (!(word & (~0ul << 32))) {
+		num -= 32;
+		word <<= 32;
+	}
+#endif
+	if (!(word & (~0ul << (BITS_PER_LONG-16)))) {
+		num -= 16;
+		word <<= 16;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-8)))) {
+		num -= 8;
+		word <<= 8;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-4)))) {
+		num -= 4;
+		word <<= 4;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-2)))) {
+		num -= 2;
+		word <<= 2;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-1))))
+		num -= 1;
+	return num;
 }
 
 /*
@@ -612,23 +640,43 @@ static inline unsigned long __ffs(unsigned long word)
  * This is defined the same way as ffs.
  * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
  */
-static inline int fls(int word)
+static inline int fls(int x)
 {
-	__asm__("clz %0, %1" : "=r" (word) : "r" (word));
+	int r;
 
-	return 32 - word;
-}
+	if (__builtin_constant_p(cpu_has_mips_r) && cpu_has_mips_r) {
+		__asm__("clz %0, %1" : "=r" (x) : "r" (x));
 
-#if defined(CONFIG_64BIT) && defined(CONFIG_CPU_MIPS64)
-static inline int fls64(__u64 word)
-{
-	__asm__("dclz %0, %1" : "=r" (word) : "r" (word));
+		return 32 - x;
+	}
 
-	return 64 - word;
+	r = 32;
+	if (!x)
+		return 0;
+	if (!(x & 0xffff0000u)) {
+		x <<= 16;
+		r -= 16;
+	}
+	if (!(x & 0xff000000u)) {
+		x <<= 8;
+		r -= 8;
+	}
+	if (!(x & 0xf0000000u)) {
+		x <<= 4;
+		r -= 4;
+	}
+	if (!(x & 0xc0000000u)) {
+		x <<= 2;
+		r -= 2;
+	}
+	if (!(x & 0x80000000u)) {
+		x <<= 1;
+		r -= 1;
+	}
+	return r;
 }
-#else
+
 #include <asm-generic/bitops/fls64.h>
-#endif
 
 /*
  * ffs - find first bit set.
@@ -646,16 +694,6 @@ static inline int ffs(int word)
 	return fls(word & -word);
 }
 
-#else
-
-#include <asm-generic/bitops/__ffs.h>
-#include <asm-generic/bitops/__fls.h>
-#include <asm-generic/bitops/ffs.h>
-#include <asm-generic/bitops/fls.h>
-#include <asm-generic/bitops/fls64.h>
-
-#endif /*defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) */
-
 #include <asm-generic/bitops/ffz.h>
 #include <asm-generic/bitops/find.h>
 

arch/mips/include/asm/break.h

@@ -29,6 +29,7 @@
 #define _BRK_THREADBP	11	/* For threads, user bp (used by debuggers) */
 #define BRK_BUG		512	/* Used by BUG() */
 #define BRK_KDB		513	/* Used in KDB_ENTER() */
+#define BRK_MEMU	514	/* Used by FPU emulator */
 #define BRK_MULOVF	1023	/* Multiply overflow */
 
 #endif /* __ASM_BREAK_H */

arch/mips/include/asm/byteorder.h

@@ -11,11 +11,19 @@
 #include <linux/compiler.h>
 #include <asm/types.h>
 
-#ifdef __GNUC__
+#if defined(__MIPSEB__)
+# define __BIG_ENDIAN
+#elif defined(__MIPSEL__)
+# define __LITTLE_ENDIAN
+#else
+# error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
+#endif
+
+#define __SWAB_64_THRU_32__
 
 #ifdef CONFIG_CPU_MIPSR2
 
-static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
+static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
 {
 	__asm__(
 	"	wsbh	%0, %1			\n"
@@ -24,9 +32,9 @@ static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
 
 	return x;
 }
-#define __arch__swab16(x)	___arch__swab16(x)
+#define __arch_swab16 __arch_swab16
 
-static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
+static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
 {
 	__asm__(
 	"	wsbh	%0, %1			\n"
@@ -36,11 +44,10 @@ static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
 
 	return x;
 }
-#define __arch__swab32(x)	___arch__swab32(x)
+#define __arch_swab32 __arch_swab32
 
 #ifdef CONFIG_CPU_MIPS64_R2
-
-static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
+static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
 {
 	__asm__(
 	"	dsbh	%0, %1			\n"
@@ -51,26 +58,11 @@ static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
 
 	return x;
 }
-
-#define __arch__swab64(x)	___arch__swab64(x)
-
+#define __arch_swab64 __arch_swab64
 #endif /* CONFIG_CPU_MIPS64_R2 */
 
 #endif /* CONFIG_CPU_MIPSR2 */
 
-#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
-#  define __BYTEORDER_HAS_U64__
-#  define __SWAB_64_THRU_32__
-#endif
-
-#endif /* __GNUC__ */
-
-#if defined(__MIPSEB__)
-#  include <linux/byteorder/big_endian.h>
-#elif defined(__MIPSEL__)
-#  include <linux/byteorder/little_endian.h>
-#else
-#  error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
-#endif
+#include <linux/byteorder.h>
 
 #endif /* _ASM_BYTEORDER_H */

arch/mips/include/asm/cpu-features.h

@@ -141,6 +141,8 @@
 #define cpu_has_mips64	(cpu_has_mips64r1 | cpu_has_mips64r2)
 #define cpu_has_mips_r1	(cpu_has_mips32r1 | cpu_has_mips64r1)
 #define cpu_has_mips_r2	(cpu_has_mips32r2 | cpu_has_mips64r2)
+#define cpu_has_mips_r	(cpu_has_mips32r1 | cpu_has_mips32r2 | \
+			 cpu_has_mips64r1 | cpu_has_mips64r2)
 
 #ifndef cpu_has_dsp
 #define cpu_has_dsp		(cpu_data[0].ases & MIPS_ASE_DSP)

arch/mips/include/asm/ds1286.h

-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Machine dependent access functions for RTC registers.
- *
- * Copyright (C) 2003 Ralf Baechle (ralf@linux-mips.org)
- */
-#ifndef _ASM_DS1286_H
-#define _ASM_DS1286_H
-
-#include <ds1286.h>
-
-#endif /* _ASM_DS1286_H */

arch/mips/include/asm/fpu_emulator.h

@@ -23,6 +23,9 @@
 #ifndef _ASM_FPU_EMULATOR_H
 #define _ASM_FPU_EMULATOR_H
 
+#include <asm/break.h>
+#include <asm/inst.h>
+
 struct mips_fpu_emulator_stats {
 	unsigned int emulated;
 	unsigned int loads;
@@ -34,4 +37,18 @@ struct mips_fpu_emulator_stats {
 
 extern struct mips_fpu_emulator_stats fpuemustats;
 
+extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
+	unsigned long cpc);
+extern int do_dsemulret(struct pt_regs *xcp);
+
+/*
+ * Instruction inserted following the badinst to further tag the sequence
+ */
+#define BD_COOKIE 0x0000bd36	/* tne $0, $0 with baggage */
+
+/*
+ * Break instruction with special math emu break code set
+ */
+#define BREAK_MATH (0x0000000d | (BRK_MEMU << 16))
+
 #endif /* _ASM_FPU_EMULATOR_H */

arch/mips/include/asm/m48t35.h

-/*
- *  Registers for the SGS-Thomson M48T35 Timekeeper RAM chip
- */
-#ifndef _ASM_M48T35_H
-#define _ASM_M48T35_H
-
-#include <linux/spinlock.h>
-
-extern spinlock_t rtc_lock;
-
-struct m48t35_rtc {
-	volatile u8	pad[0x7ff8];    /* starts at 0x7ff8 */
-	volatile u8	control;
-	volatile u8	sec;
-	volatile u8	min;
-	volatile u8	hour;
-	volatile u8	day;
-	volatile u8	date;
-	volatile u8	month;
-	volatile u8	year;
-};
-
-#define M48T35_RTC_SET		0x80
-#define M48T35_RTC_STOPPED	0x80
-#define M48T35_RTC_READ		0x40
-
-#endif /* _ASM_M48T35_H */

arch/mips/kernel/cpu-probe.c

@@ -286,11 +286,12 @@ static inline int __cpu_has_fpu(void)
 #define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \
 		| MIPS_CPU_COUNTER)
 
-static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
+static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_R2000:
 		c->cputype = CPU_R2000;
+		__cpu_name[cpu] = "R2000";
 		c->isa_level = MIPS_CPU_ISA_I;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
 		             MIPS_CPU_NOFPUEX;
@@ -299,13 +300,19 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		c->tlbsize = 64;
 		break;
 	case PRID_IMP_R3000:
-		if ((c->processor_id & 0xff) == PRID_REV_R3000A)
-			if (cpu_has_confreg())
+		if ((c->processor_id & 0xff) == PRID_REV_R3000A) {
+			if (cpu_has_confreg()) {
 				c->cputype = CPU_R3081E;
-			else
+				__cpu_name[cpu] = "R3081";
+			} else {
 				c->cputype = CPU_R3000A;
-		else
+				__cpu_name[cpu] = "R3000A";
+			}
+			break;
+		} else {
 			c->cputype = CPU_R3000;
+			__cpu_name[cpu] = "R3000";
+		}
 		c->isa_level = MIPS_CPU_ISA_I;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
 		             MIPS_CPU_NOFPUEX;
@@ -315,15 +322,21 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R4000:
 		if (read_c0_config() & CONF_SC) {
-			if ((c->processor_id & 0xff) >= PRID_REV_R4400)
+			if ((c->processor_id & 0xff) >= PRID_REV_R4400) {
 				c->cputype = CPU_R4400PC;
-			else
+				__cpu_name[cpu] = "R4400PC";
+			} else {
 				c->cputype = CPU_R4000PC;
+				__cpu_name[cpu] = "R4000PC";
+			}
 		} else {
-			if ((c->processor_id & 0xff) >= PRID_REV_R4400)
+			if ((c->processor_id & 0xff) >= PRID_REV_R4400) {
 				c->cputype = CPU_R4400SC;
-			else
+				__cpu_name[cpu] = "R4400SC";
+			} else {
 				c->cputype = CPU_R4000SC;
+				__cpu_name[cpu] = "R4000SC";
+			}
 		}
 
 		c->isa_level = MIPS_CPU_ISA_III;
@@ -336,25 +349,34 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		switch (c->processor_id & 0xf0) {
 		case PRID_REV_VR4111:
 			c->cputype = CPU_VR4111;
+			__cpu_name[cpu] = "NEC VR4111";
 			break;
 		case PRID_REV_VR4121:
 			c->cputype = CPU_VR4121;
+			__cpu_name[cpu] = "NEC VR4121";
 			break;
 		case PRID_REV_VR4122:
-			if ((c->processor_id & 0xf) < 0x3)
+			if ((c->processor_id & 0xf) < 0x3) {
 				c->cputype = CPU_VR4122;
-			else
+				__cpu_name[cpu] = "NEC VR4122";
+			} else {
 				c->cputype = CPU_VR4181A;
+				__cpu_name[cpu] = "NEC VR4181A";
+			}
 			break;
 		case PRID_REV_VR4130:
-			if ((c->processor_id & 0xf) < 0x4)
+			if ((c->processor_id & 0xf) < 0x4) {
 				c->cputype = CPU_VR4131;
-			else
+				__cpu_name[cpu] = "NEC VR4131";
+			} else {
 				c->cputype = CPU_VR4133;
+				__cpu_name[cpu] = "NEC VR4133";
+			}
 			break;
 		default:
 			printk(KERN_INFO "Unexpected CPU of NEC VR4100 series\n");
 			c->cputype = CPU_VR41XX;
+			__cpu_name[cpu] = "NEC Vr41xx";
 			break;
 		}
 		c->isa_level = MIPS_CPU_ISA_III;
@@ -363,6 +385,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R4300:
 		c->cputype = CPU_R4300;
+		__cpu_name[cpu] = "R4300";
 		c->isa_level = MIPS_CPU_ISA_III;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_LLSC;
@@ -370,6 +393,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R4600:
 		c->cputype = CPU_R4600;
+		__cpu_name[cpu] = "R4600";
 		c->isa_level = MIPS_CPU_ISA_III;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 			     MIPS_CPU_LLSC;
@@ -384,6 +408,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		 * it's c0_prid id number with the TX3900.
 		 */
 		c->cputype = CPU_R4650;
+		__cpu_name[cpu] = "R4650";
 	 	c->isa_level = MIPS_CPU_ISA_III;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_LLSC;
 	        c->tlbsize = 48;
@@ -395,25 +420,26 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 
 		if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) {
 			c->cputype = CPU_TX3927;
+			__cpu_name[cpu] = "TX3927";
 			c->tlbsize = 64;
 		} else {
 			switch (c->processor_id & 0xff) {
 			case PRID_REV_TX3912:
 				c->cputype = CPU_TX3912;
+				__cpu_name[cpu] = "TX3912";
 				c->tlbsize = 32;
 				break;
 			case PRID_REV_TX3922:
 				c->cputype = CPU_TX3922;
+				__cpu_name[cpu] = "TX3922";
 				c->tlbsize = 64;
 				break;
-			default:
-				c->cputype = CPU_UNKNOWN;
-				break;
 			}
 		}
 		break;
 	case PRID_IMP_R4700:
 		c->cputype = CPU_R4700;
+		__cpu_name[cpu] = "R4700";
 		c->isa_level = MIPS_CPU_ISA_III;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_LLSC;
@@ -421,6 +447,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_TX49:
 		c->cputype = CPU_TX49XX;
+		__cpu_name[cpu] = "R49XX";
 		c->isa_level = MIPS_CPU_ISA_III;
 		c->options = R4K_OPTS | MIPS_CPU_LLSC;
 		if (!(c->processor_id & 0x08))
@@ -429,6 +456,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R5000:
 		c->cputype = CPU_R5000;
+		__cpu_name[cpu] = "R5000";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_LLSC;
@@ -436,6 +464,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R5432:
 		c->cputype = CPU_R5432;
+		__cpu_name[cpu] = "R5432";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_WATCH | MIPS_CPU_LLSC;
@@ -443,6 +472,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R5500:
 		c->cputype = CPU_R5500;
+		__cpu_name[cpu] = "R5500";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_WATCH | MIPS_CPU_LLSC;
@@ -450,6 +480,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_NEVADA:
 		c->cputype = CPU_NEVADA;
+		__cpu_name[cpu] = "Nevada";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_DIVEC | MIPS_CPU_LLSC;
@@ -457,6 +488,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R6000:
 		c->cputype = CPU_R6000;
+		__cpu_name[cpu] = "R6000";
 		c->isa_level = MIPS_CPU_ISA_II;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_FPU |
 		             MIPS_CPU_LLSC;
@@ -464,6 +496,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R6000A:
 		c->cputype = CPU_R6000A;
+		__cpu_name[cpu] = "R6000A";
 		c->isa_level = MIPS_CPU_ISA_II;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_FPU |
 		             MIPS_CPU_LLSC;
@@ -471,6 +504,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_RM7000:
 		c->cputype = CPU_RM7000;
+		__cpu_name[cpu] = "RM7000";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_LLSC;
@@ -486,6 +520,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_RM9000:
 		c->cputype = CPU_RM9000;
+		__cpu_name[cpu] = "RM9000";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
 		             MIPS_CPU_LLSC;
@@ -500,6 +535,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R8000:
 		c->cputype = CPU_R8000;
+		__cpu_name[cpu] = "RM8000";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX |
 		             MIPS_CPU_FPU | MIPS_CPU_32FPR |
@@ -508,6 +544,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R10000:
 		c->cputype = CPU_R10000;
+		__cpu_name[cpu] = "R10000";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
 		             MIPS_CPU_FPU | MIPS_CPU_32FPR |
@@ -517,6 +554,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R12000:
 		c->cputype = CPU_R12000;
+		__cpu_name[cpu] = "R12000";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
 		             MIPS_CPU_FPU | MIPS_CPU_32FPR |
@@ -526,6 +564,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_R14000:
 		c->cputype = CPU_R14000;
+		__cpu_name[cpu] = "R14000";
 		c->isa_level = MIPS_CPU_ISA_IV;
 		c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
 		             MIPS_CPU_FPU | MIPS_CPU_32FPR |
@@ -535,6 +574,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		break;
 	case PRID_IMP_LOONGSON2:
 		c->cputype = CPU_LOONGSON2;
+		__cpu_name[cpu] = "ICT Loongson-2";
 		c->isa_level = MIPS_CPU_ISA_III;
 		c->options = R4K_OPTS |
 			     MIPS_CPU_FPU | MIPS_CPU_LLSC |
@@ -652,21 +692,24 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c)
 
 static void __cpuinit decode_configs(struct cpuinfo_mips *c)
 {
+	int ok;
+
 	/* MIPS32 or MIPS64 compliant CPU.  */
 	c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER |
 	             MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK;
 
 	c->scache.flags = MIPS_CACHE_NOT_PRESENT;
 
-	/* Read Config registers.  */
-	if (!decode_config0(c))
-		return;			/* actually worth a panic() */
-	if (!decode_config1(c))
-		return;
-	if (!decode_config2(c))
-		return;
-	if (!decode_config3(c))
-		return;
+	ok = decode_config0(c);			/* Read Config registers.  */
+	BUG_ON(!ok);				/* Arch spec violation!  */
+	if (ok)
+		ok = decode_config1(c);
+	if (ok)
+		ok = decode_config2(c);
+	if (ok)
+		ok = decode_config3(c);
+
+	mips_probe_watch_registers(c);
 }
 
 #ifdef CONFIG_CPU_MIPSR2
@@ -675,52 +718,62 @@ extern void spram_config(void);
 static inline void spram_config(void) {}
 #endif
 
-static inline void cpu_probe_mips(struct cpuinfo_mips *c)
+static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	decode_configs(c);
-	mips_probe_watch_registers(c);
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_4KC:
 		c->cputype = CPU_4KC;
+		__cpu_name[cpu] = "MIPS 4Kc";
 		break;
 	case PRID_IMP_4KEC:
 		c->cputype = CPU_4KEC;
+		__cpu_name[cpu] = "MIPS 4KEc";
 		break;
 	case PRID_IMP_4KECR2:
 		c->cputype = CPU_4KEC;
+		__cpu_name[cpu] = "MIPS 4KEc";
 		break;
 	case PRID_IMP_4KSC:
 	case PRID_IMP_4KSD:
 		c->cputype = CPU_4KSC;
+		__cpu_name[cpu] = "MIPS 4KSc";
 		break;
 	case PRID_IMP_5KC:
 		c->cputype = CPU_5KC;
+		__cpu_name[cpu] = "MIPS 5Kc";
 		break;
 	case PRID_IMP_20KC:
 		c->cputype = CPU_20KC;
+		__cpu_name[cpu] = "MIPS 20Kc";
 		break;
 	case PRID_IMP_24K:
 	case PRID_IMP_24KE:
 		c->cputype = CPU_24K;
+		__cpu_name[cpu] = "MIPS 24Kc";
 		break;
 	case PRID_IMP_25KF:
 		c->cputype = CPU_25KF;
+		__cpu_name[cpu] = "MIPS 25Kc";
 		break;
 	case PRID_IMP_34K:
 		c->cputype = CPU_34K;
+		__cpu_name[cpu] = "MIPS 34Kc";
 		break;
 	case PRID_IMP_74K:
 		c->cputype = CPU_74K;
+		__cpu_name[cpu] = "MIPS 74Kc";
 		break;
 	case PRID_IMP_1004K:
 		c->cputype = CPU_1004K;
+		__cpu_name[cpu] = "MIPS 1004Kc";
 		break;
 	}
 
 	spram_config();
 }
 
-static inline void cpu_probe_alchemy(struct cpuinfo_mips *c)
+static inline void cpu_probe_alchemy(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	decode_configs(c);
 	switch (c->processor_id & 0xff00) {
@@ -729,23 +782,31 @@ static inline void cpu_probe_alchemy(struct cpuinfo_mips *c)
 		switch ((c->processor_id >> 24) & 0xff) {
 		case 0:
 			c->cputype = CPU_AU1000;
+			__cpu_name[cpu] = "Au1000";
 			break;
 		case 1:
 			c->cputype = CPU_AU1500;
+			__cpu_name[cpu] = "Au1500";
 			break;
 		case 2:
 			c->cputype = CPU_AU1100;
+			__cpu_name[cpu] = "Au1100";
 			break;
 		case 3:
 			c->cputype = CPU_AU1550;
+			__cpu_name[cpu] = "Au1550";
 			break;
 		case 4:
 			c->cputype = CPU_AU1200;
-			if (2 == (c->processor_id & 0xff))
+			__cpu_name[cpu] = "Au1200";
+			if ((c->processor_id & 0xff) == 2) {
 				c->cputype = CPU_AU1250;
+				__cpu_name[cpu] = "Au1250";
+			}
 			break;
 		case 5:
 			c->cputype = CPU_AU1210;
+			__cpu_name[cpu] = "Au1210";
 			break;
 		default:
 			panic("Unknown Au Core!");
@@ -755,154 +816,67 @@ static inline void cpu_probe_alchemy(struct cpuinfo_mips *c)
 	}
 }
 
-static inline void cpu_probe_sibyte(struct cpuinfo_mips *c)
+static inline void cpu_probe_sibyte(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	decode_configs(c);
 
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_SB1:
 		c->cputype = CPU_SB1;
+		__cpu_name[cpu] = "SiByte SB1";
 		/* FPU in pass1 is known to have issues. */
 		if ((c->processor_id & 0xff) < 0x02)
 			c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR);
 		break;
 	case PRID_IMP_SB1A:
 		c->cputype = CPU_SB1A;
+		__cpu_name[cpu] = "SiByte SB1A";
 		break;
 	}
 }
 
-static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c)
+static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	decode_configs(c);
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_SR71000:
 		c->cputype = CPU_SR71000;
+		__cpu_name[cpu] = "Sandcraft SR71000";
 		c->scache.ways = 8;
 		c->tlbsize = 64;
 		break;
 	}
 }
 
-static inline void cpu_probe_nxp(struct cpuinfo_mips *c)
+static inline void cpu_probe_nxp(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	decode_configs(c);
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_PR4450:
 		c->cputype = CPU_PR4450;
+		__cpu_name[cpu] = "Philips PR4450";
 		c->isa_level = MIPS_CPU_ISA_M32R1;
 		break;
-	default:
-		panic("Unknown NXP Core!"); /* REVISIT: die? */
-		break;
 	}
 }
 
-
-static inline void cpu_probe_broadcom(struct cpuinfo_mips *c)
+static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu)
 {
 	decode_configs(c);
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_BCM3302:
 		c->cputype = CPU_BCM3302;
+		__cpu_name[cpu] = "Broadcom BCM3302";
 		break;
 	case PRID_IMP_BCM4710:
 		c->cputype = CPU_BCM4710;
-		break;
-	default:
-		c->cputype = CPU_UNKNOWN;
+		__cpu_name[cpu] = "Broadcom BCM4710";
 		break;
 	}
 }
 
 const char *__cpu_name[NR_CPUS];
 
-/*
- * Name a CPU
- */
-static __cpuinit const char *cpu_to_name(struct cpuinfo_mips *c)
-{
-	const char *name = NULL;
-
-	switch (c->cputype) {
-	case CPU_UNKNOWN:	name = "unknown"; break;
-	case CPU_R2000:		name = "R2000"; break;
-	case CPU_R3000:		name = "R3000"; break;
-	case CPU_R3000A:	name = "R3000A"; break;
-	case CPU_R3041:		name = "R3041"; break;
-	case CPU_R3051:		name = "R3051"; break;
-	case CPU_R3052:		name = "R3052"; break;
-	case CPU_R3081:		name = "R3081"; break;
-	case CPU_R3081E:	name = "R3081E"; break;
-	case CPU_R4000PC:	name = "R4000PC"; break;
-	case CPU_R4000SC:	name = "R4000SC"; break;
-	case CPU_R4000MC:	name = "R4000MC"; break;
-	case CPU_R4200:		name = "R4200"; break;
-	case CPU_R4400PC:	name = "R4400PC"; break;
-	case CPU_R4400SC:	name = "R4400SC"; break;
-	case CPU_R4400MC:	name = "R4400MC"; break;
-	case CPU_R4600:		name = "R4600"; break;
-	case CPU_R6000:		name = "R6000"; break;
-	case CPU_R6000A:	name = "R6000A"; break;
-	case CPU_R8000:		name = "R8000"; break;
-	case CPU_R10000:	name = "R10000"; break;
-	case CPU_R12000:	name = "R12000"; break;
-	case CPU_R14000:	name = "R14000"; break;
-	case CPU_R4300:		name = "R4300"; break;
-	case CPU_R4650:		name = "R4650"; break;
-	case CPU_R4700:		name = "R4700"; break;
-	case CPU_R5000:		name = "R5000"; break;
-	case CPU_R5000A:	name = "R5000A"; break;
-	case CPU_R4640:		name = "R4640"; break;
-	case CPU_NEVADA:	name = "Nevada"; break;
-	case CPU_RM7000:	name = "RM7000"; break;
-	case CPU_RM9000:	name = "RM9000"; break;
-	case CPU_R5432:		name = "R5432"; break;
-	case CPU_4KC:		name = "MIPS 4Kc"; break;
-	case CPU_5KC:		name = "MIPS 5Kc"; break;
-	case CPU_R4310:		name = "R4310"; break;
-	case CPU_SB1:		name = "SiByte SB1"; break;
-	case CPU_SB1A:		name = "SiByte SB1A"; break;
-	case CPU_TX3912:	name = "TX3912"; break;
-	case CPU_TX3922:	name = "TX3922"; break;
-	case CPU_TX3927:	name = "TX3927"; break;
-	case CPU_AU1000:	name = "Au1000"; break;
-	case CPU_AU1500:	name = "Au1500"; break;
-	case CPU_AU1100:	name = "Au1100"; break;
-	case CPU_AU1550:	name = "Au1550"; break;
-	case CPU_AU1200:	name = "Au1200"; break;
-	case CPU_AU1210:	name = "Au1210"; break;
-	case CPU_AU1250:	name = "Au1250"; break;
-	case CPU_4KEC:		name = "MIPS 4KEc"; break;
-	case CPU_4KSC:		name = "MIPS 4KSc"; break;
-	case CPU_VR41XX:	name = "NEC Vr41xx"; break;
-	case CPU_R5500:		name = "R5500"; break;
-	case CPU_TX49XX:	name = "TX49xx"; break;
-	case CPU_20KC:		name = "MIPS 20Kc"; break;
-	case CPU_24K:		name = "MIPS 24K"; break;
-	case CPU_25KF:		name = "MIPS 25Kf"; break;
-	case CPU_34K:		name = "MIPS 34K"; break;
-	case CPU_1004K:		name = "MIPS 1004K"; break;
-	case CPU_74K:		name = "MIPS 74K"; break;
-	case CPU_VR4111:	name = "NEC VR4111"; break;
-	case CPU_VR4121:	name = "NEC VR4121"; break;
-	case CPU_VR4122:	name = "NEC VR4122"; break;
-	case CPU_VR4131:	name = "NEC VR4131"; break;
-	case CPU_VR4133:	name = "NEC VR4133"; break;
-	case CPU_VR4181:	name = "NEC VR4181"; break;
-	case CPU_VR4181A:	name = "NEC VR4181A"; break;
-	case CPU_SR71000:	name = "Sandcraft SR71000"; break;
-	case CPU_BCM3302:	name = "Broadcom BCM3302"; break;
-	case CPU_BCM4710:	name = "Broadcom BCM4710"; break;
-	case CPU_PR4450:	name = "Philips PR4450"; break;
-	case CPU_LOONGSON2:	name = "ICT Loongson-2"; break;
-	default:
-		BUG();
-	}
-
-	return name;
-}
-
 __cpuinit void cpu_probe(void)
 {
 	struct cpuinfo_mips *c = &current_cpu_data;
@@ -915,30 +889,31 @@ __cpuinit void cpu_probe(void)
 	c->processor_id = read_c0_prid();
 	switch (c->processor_id & 0xff0000) {
 	case PRID_COMP_LEGACY:
-		cpu_probe_legacy(c);
+		cpu_probe_legacy(c, cpu);
 		break;
 	case PRID_COMP_MIPS:
-		cpu_probe_mips(c);
+		cpu_probe_mips(c, cpu);
 		break;
 	case PRID_COMP_ALCHEMY:
-		cpu_probe_alchemy(c);
+		cpu_probe_alchemy(c, cpu);
 		break;
 	case PRID_COMP_SIBYTE:
-		cpu_probe_sibyte(c);
+		cpu_probe_sibyte(c, cpu);
 		break;
 	case PRID_COMP_BROADCOM:
-		cpu_probe_broadcom(c);
+		cpu_probe_broadcom(c, cpu);
 		break;
 	case PRID_COMP_SANDCRAFT:
-		cpu_probe_sandcraft(c);
+		cpu_probe_sandcraft(c, cpu);
 		break;
 	case PRID_COMP_NXP:
-		cpu_probe_nxp(c);
+		cpu_probe_nxp(c, cpu);
 		break;
-	default:
-		c->cputype = CPU_UNKNOWN;
 	}
 
+	BUG_ON(!__cpu_name[cpu]);
+	BUG_ON(c->cputype == CPU_UNKNOWN);
+
 	/*
 	 * Platform code can force the cpu type to optimize code
 	 * generation. In that case be sure the cpu type is correctly
@@ -958,8 +933,6 @@ __cpuinit void cpu_probe(void)
 		}
 	}
 
-	__cpu_name[cpu] = cpu_to_name(c);
-
 	if (cpu_has_mips_r2)
 		c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1;
 	else

arch/mips/kernel/smp.c

@@ -195,12 +195,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 /* preload SMP state for boot cpu */
 void __devinit smp_prepare_boot_cpu(void)
 {
-	/*
-	 * This assumes that bootup is always handled by the processor
-	 * with the logic and physical number 0.
-	 */
-	__cpu_number_map[0] = 0;
-	__cpu_logical_map[0] = 0;
 	cpu_set(0, phys_cpu_present_map);
 	cpu_set(0, cpu_online_map);
 	cpu_set(0, cpu_callin_map);

arch/mips/kernel/traps.c

@@ -32,6 +32,7 @@
 #include <asm/cpu.h>
 #include <asm/dsp.h>
 #include <asm/fpu.h>
+#include <asm/fpu_emulator.h>
 #include <asm/mipsregs.h>
 #include <asm/mipsmtregs.h>
 #include <asm/module.h>
@@ -722,6 +723,21 @@ static void do_trap_or_bp(struct pt_regs *regs, unsigned int code,
 		die_if_kernel("Kernel bug detected", regs);
 		force_sig(SIGTRAP, current);
 		break;
+	case BRK_MEMU:
+		/*
+		 * Address errors may be deliberately induced by the FPU
+		 * emulator to retake control of the CPU after executing the
+		 * instruction in the delay slot of an emulated branch.
+		 *
+		 * Terminate if exception was recognized as a delay slot return
+		 * otherwise handle as normal.
+		 */
+		if (do_dsemulret(regs))
+			return;
+
+		die_if_kernel("Math emu break/trap", regs);
+		force_sig(SIGTRAP, current);
+		break;
 	default:
 		scnprintf(b, sizeof(b), "%s instruction in kernel code", str);
 		die_if_kernel(b, regs);
@@ -1555,6 +1571,8 @@ void __cpuinit set_uncached_handler(unsigned long offset, void *addr,
 #ifdef CONFIG_64BIT
 	unsigned long uncached_ebase = TO_UNCAC(ebase);
 #endif
+	if (cpu_has_mips_r2)
+		ebase += (read_c0_ebase() & 0x3ffff000);
 
 	if (!addr)
 		panic(panic_null_cerr);
@@ -1588,8 +1606,11 @@ void __init trap_init(void)
 
 	if (cpu_has_veic || cpu_has_vint)
 		ebase = (unsigned long) alloc_bootmem_low_pages(0x200 + VECTORSPACING*64);
-	else
+	else {
 		ebase = CAC_BASE;
+		if (cpu_has_mips_r2)
+			ebase += (read_c0_ebase() & 0x3ffff000);
+	}
 
 	per_cpu_trap_init();
 
@@ -1697,11 +1718,11 @@ void __init trap_init(void)
 
 	if (cpu_has_vce)
 		/* Special exception: R4[04]00 uses also the divec space. */
-		memcpy((void *)(CAC_BASE + 0x180), &except_vec3_r4000, 0x100);
+		memcpy((void *)(ebase + 0x180), &except_vec3_r4000, 0x100);
 	else if (cpu_has_4kex)
-		memcpy((void *)(CAC_BASE + 0x180), &except_vec3_generic, 0x80);
+		memcpy((void *)(ebase + 0x180), &except_vec3_generic, 0x80);
 	else
-		memcpy((void *)(CAC_BASE + 0x080), &except_vec3_generic, 0x80);
+		memcpy((void *)(ebase + 0x080), &except_vec3_generic, 0x80);
 
 	signal_init();
 #ifdef CONFIG_MIPS32_COMPAT

arch/mips/kernel/unaligned.c

@@ -499,21 +499,9 @@ sigill:
 
 asmlinkage void do_ade(struct pt_regs *regs)
 {
-	extern int do_dsemulret(struct pt_regs *);
 	unsigned int __user *pc;
 	mm_segment_t seg;
 
-	/*
-	 * Address errors may be deliberately induced by the FPU emulator to
-	 * retake control of the CPU after executing the instruction in the
-	 * delay slot of an emulated branch.
-	 */
-	/* Terminate if exception was recognized as a delay slot return */
-	if (do_dsemulret(regs))
-		return;
-
-	/* Otherwise handle as normal */
-
 	/*
 	 * Did we catch a fault trying to load an instruction?
 	 * Or are we running in MIPS16 mode?

arch/mips/math-emu/cp1emu.c

@@ -48,7 +48,6 @@
 #include <asm/branch.h>
 
 #include "ieee754.h"
-#include "dsemul.h"
 
 /* Strap kernel emulator for full MIPS IV emulation */
 
@@ -346,9 +345,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx)
 			/* cop control register rd -> gpr[rt] */
 			u32 value;
 
-			if (ir == CP1UNDEF) {
-				return do_dsemulret(xcp);
-			}
 			if (MIPSInst_RD(ir) == FPCREG_CSR) {
 				value = ctx->fcr31;
 				value = (value & ~0x3) | mips_rm[value & 0x3];

arch/mips/math-emu/dsemul.c

@@ -18,7 +18,6 @@
 #include <asm/fpu_emulator.h>
 
 #include "ieee754.h"
-#include "dsemul.h"
 
 /* Strap kernel emulator for full MIPS IV emulation */
 
@@ -94,7 +93,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc)
 		return SIGBUS;
 
 	err = __put_user(ir, &fr->emul);
-	err |= __put_user((mips_instruction)BADINST, &fr->badinst);
+	err |= __put_user((mips_instruction)BREAK_MATH, &fr->badinst);
 	err |= __put_user((mips_instruction)BD_COOKIE, &fr->cookie);
 	err |= __put_user(cpc, &fr->epc);
 
@@ -130,13 +129,13 @@ int do_dsemulret(struct pt_regs *xcp)
 	/*
 	 * Do some sanity checking on the stackframe:
 	 *
-	 *  - Is the instruction pointed to by the EPC an BADINST?
+	 *  - Is the instruction pointed to by the EPC an BREAK_MATH?
 	 *  - Is the following memory word the BD_COOKIE?
 	 */
 	err = __get_user(insn, &fr->badinst);
 	err |= __get_user(cookie, &fr->cookie);
 
-	if (unlikely(err || (insn != BADINST) || (cookie != BD_COOKIE))) {
+	if (unlikely(err || (insn != BREAK_MATH) || (cookie != BD_COOKIE))) {
 		fpuemustats.errors++;
 		return 0;
 	}

arch/mips/math-emu/dsemul.h

-extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc);
-extern int do_dsemulret(struct pt_regs *xcp);
-
-/* Instruction which will always cause an address error */
-#define AdELOAD 0x8c000001	/* lw $0,1($0) */
-/* Instruction which will plainly cause a CP1 exception when FPU is disabled */
-#define CP1UNDEF 0x44400001    /* cfc1 $0,$0 undef  */
-
-/* Instruction inserted following the badinst to further tag the sequence */
-#define BD_COOKIE 0x0000bd36 /* tne $0,$0 with baggage */
-
-/* Setup which instruction to use for trampoline */
-#ifdef STANDALONE_EMULATOR
-#define BADINST CP1UNDEF
-#else
-#define BADINST AdELOAD
-#endif

arch/mips/txx9/rbtx4927/setup.c

@@ -49,6 +49,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/leds.h>
 #include <asm/io.h>
 #include <asm/reboot.h>
 #include <asm/txx9/generic.h>
@@ -210,10 +211,6 @@ static void __init rbtx4927_mem_setup(void)
 	/* TX4927-SIO DTR on (PIO[15]) */
 	gpio_request(15, "sio-dtr");
 	gpio_direction_output(15, 1);
-	gpio_request(0, "led");
-	gpio_direction_output(0, 1);
-	gpio_request(1, "led");
-	gpio_direction_output(1, 1);
 
 	tx4927_sio_init(0, 0);
 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
@@ -315,6 +312,25 @@ static void __init rbtx4927_mtd_init(void)
 		tx4927_mtd_init(i);
 }
 
+static void __init rbtx4927_gpioled_init(void)
+{
+	static struct gpio_led leds[] = {
+		{ .name = "gpioled:green:0", .gpio = 0, .active_low = 1, },
+		{ .name = "gpioled:green:1", .gpio = 1, .active_low = 1, },
+	};
+	static struct gpio_led_platform_data pdata = {
+		.num_leds = ARRAY_SIZE(leds),
+		.leds = leds,
+	};
+	struct platform_device *pdev = platform_device_alloc("leds-gpio", 0);
+
+	if (!pdev)
+		return;
+	pdev->dev.platform_data = &pdata;
+	if (platform_device_add(pdev))
+		platform_device_put(pdev);
+}
+
 static void __init rbtx4927_device_init(void)
 {
 	toshiba_rbtx4927_rtc_init();
@@ -322,6 +338,7 @@ static void __init rbtx4927_device_init(void)
 	tx4927_wdt_init();
 	rbtx4927_mtd_init();
 	txx9_iocled_init(RBTX4927_LED_ADDR - IO_BASE, -1, 3, 1, "green", NULL);
+	rbtx4927_gpioled_init();
 }
 
 struct txx9_board_vec rbtx4927_vec __initdata = {

arch/mips/txx9/rbtx4939/setup.c

@@ -308,16 +308,22 @@ static void __init rbtx4939_device_init(void)
 #if defined(CONFIG_TC35815) || defined(CONFIG_TC35815_MODULE)
 	int i, j;
 	unsigned char ethaddr[2][6];
+	u8 bdipsw = readb(rbtx4939_bdipsw_addr) & 0x0f;
+
 	for (i = 0; i < 2; i++) {
 		unsigned long area = CKSEG1 + 0x1fff0000 + (i * 0x10);
-		if (readb(rbtx4939_bdipsw_addr) & 8) {
+		if (bdipsw == 0)
+			memcpy(ethaddr[i], (void *)area, 6);
+		else {
 			u16 buf[3];
+			if (bdipsw & 8)
 				area -= 0x03000000;
+			else
+				area -= 0x01000000;
 			for (j = 0; j < 3; j++)
 				buf[j] = le16_to_cpup((u16 *)(area + j * 2));
 			memcpy(ethaddr[i], buf, 6);
-		} else
-			memcpy(ethaddr[i], (void *)area, 6);
+		}
 	}
 	tx4939_ethaddr_init(ethaddr[0], ethaddr[1]);
 #endif

drivers/char/Kconfig

@@ -812,28 +812,6 @@ config JS_RTC
 	  To compile this driver as a module, choose M here: the
 	  module will be called js-rtc.
 
-config SGI_DS1286
-	tristate "SGI DS1286 RTC support"
-	depends on SGI_HAS_DS1286
-	help
-	  If you say Y here and create a character special file /dev/rtc with
-	  major number 10 and minor number 135 using mknod ("man mknod"), you
-	  will get access to the real time clock built into your computer.
-	  Every SGI has such a clock built in. It reports status information
-	  via the file /proc/rtc and its behaviour is set by various ioctls on
-	  /dev/rtc.
-
-config SGI_IP27_RTC
-	bool "SGI M48T35 RTC support"
-	depends on SGI_IP27
-	help
-	  If you say Y here and create a character special file /dev/rtc with
-	  major number 10 and minor number 135 using mknod ("man mknod"), you
-	  will get access to the real time clock built into your computer.
-	  Every SGI has such a clock built in. It reports status information
-	  via the file /proc/rtc and its behaviour is set by various ioctls on
-	  /dev/rtc.
-
 config GEN_RTC
 	tristate "Generic /dev/rtc emulation"
 	depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32

drivers/char/Makefile

@@ -74,8 +74,6 @@ obj-$(CONFIG_RTC)		+= rtc.o
 obj-$(CONFIG_HPET)		+= hpet.o
 obj-$(CONFIG_GEN_RTC)		+= genrtc.o
 obj-$(CONFIG_EFI_RTC)		+= efirtc.o
-obj-$(CONFIG_SGI_DS1286)	+= ds1286.o
-obj-$(CONFIG_SGI_IP27_RTC)	+= ip27-rtc.o
 obj-$(CONFIG_DS1302)		+= ds1302.o
 obj-$(CONFIG_XILINX_HWICAP)	+= xilinx_hwicap/
 ifeq ($(CONFIG_GENERIC_NVRAM),y)

drivers/char/ds1286.c

-/*
- * DS1286 Real Time Clock interface for Linux
- *
- * Copyright (C) 1998, 1999, 2000 Ralf Baechle
- *
- * Based on code written by Paul Gortmaker.
- *
- * This driver allows use of the real time clock (built into nearly all
- * computers) from user space. It exports the /dev/rtc interface supporting
- * various ioctl() and also the /proc/rtc pseudo-file for status
- * information.
- *
- * The ioctls can be used to set the interrupt behaviour and generation rate
- * from the RTC via IRQ 8. Then the /dev/rtc interface can be used to make
- * use of these timer interrupts, be they interval or alarm based.
- *
- * The /dev/rtc interface will block on reads until an interrupt has been
- * received. If a RTC interrupt has already happened, it will output an
- * unsigned long and then block. The output value contains the interrupt
- * status in the low byte and the number of interrupts since the last read
- * in the remaining high bytes. The /dev/rtc interface can also be used with
- * the select(2) call.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <linux/ds1286.h>
-#include <linux/smp_lock.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/miscdevice.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/rtc.h>
-#include <linux/spinlock.h>
-#include <linux/bcd.h>
-#include <linux/proc_fs.h>
-#include <linux/jiffies.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define DS1286_VERSION		"1.0"
-
-/*
- *	We sponge a minor off of the misc major. No need slurping
- *	up another valuable major dev number for this. If you add
- *	an ioctl, make sure you don't conflict with SPARC's RTC
- *	ioctls.
- */
-
-static DECLARE_WAIT_QUEUE_HEAD(ds1286_wait);
-
-static ssize_t ds1286_read(struct file *file, char *buf,
-			size_t count, loff_t *ppos);
-
-static int ds1286_ioctl(struct inode *inode, struct file *file,
-                        unsigned int cmd, unsigned long arg);
-
-static unsigned int ds1286_poll(struct file *file, poll_table *wait);
-
-static void ds1286_get_alm_time (struct rtc_time *alm_tm);
-static void ds1286_get_time(struct rtc_time *rtc_tm);
-static int ds1286_set_time(struct rtc_time *rtc_tm);
-
-static inline unsigned char ds1286_is_updating(void);
-
-static DEFINE_SPINLOCK(ds1286_lock);
-
-static int ds1286_read_proc(char *page, char **start, off_t off,
-                            int count, int *eof, void *data);
-
-/*
- *	Bits in rtc_status. (7 bits of room for future expansion)
- */
-
-#define RTC_IS_OPEN		0x01	/* means /dev/rtc is in use	*/
-#define RTC_TIMER_ON		0x02	/* missed irq timer active	*/
-
-static unsigned char ds1286_status;	/* bitmapped status byte.	*/
-
-static unsigned char days_in_mo[] = {
-	0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
-};
-
-/*
- *	Now all the various file operations that we export.
- */
-
-static ssize_t ds1286_read(struct file *file, char *buf,
-                           size_t count, loff_t *ppos)
-{
-	return -EIO;
-}
-
-static int ds1286_ioctl(struct inode *inode, struct file *file,
-                        unsigned int cmd, unsigned long arg)
-{
-	struct rtc_time wtime;
-
-	switch (cmd) {
-	case RTC_AIE_OFF:	/* Mask alarm int. enab. bit	*/
-	{
-		unsigned long flags;
-		unsigned char val;
-
-		if (!capable(CAP_SYS_TIME))
-			return -EACCES;
-
-		spin_lock_irqsave(&ds1286_lock, flags);
-		val = rtc_read(RTC_CMD);
-		val |=  RTC_TDM;
-		rtc_write(val, RTC_CMD);
-		spin_unlock_irqrestore(&ds1286_lock, flags);
-
-		return 0;
-	}
-	case RTC_AIE_ON:	/* Allow alarm interrupts.	*/
-	{
-		unsigned long flags;
-		unsigned char val;
-
-		if (!capable(CAP_SYS_TIME))
-			return -EACCES;
-
-		spin_lock_irqsave(&ds1286_lock, flags);
-		val = rtc_read(RTC_CMD);
-		val &=  ~RTC_TDM;
-		rtc_write(val, RTC_CMD);
-		spin_unlock_irqrestore(&ds1286_lock, flags);
-
-		return 0;
-	}
-	case RTC_WIE_OFF:	/* Mask watchdog int. enab. bit	*/
-	{
-		unsigned long flags;
-		unsigned char val;
-
-		if (!capable(CAP_SYS_TIME))
-			return -EACCES;
-
-		spin_lock_irqsave(&ds1286_lock, flags);
-		val = rtc_read(RTC_CMD);
-		val |= RTC_WAM;
-		rtc_write(val, RTC_CMD);
-		spin_unlock_irqrestore(&ds1286_lock, flags);
-
-		return 0;
-	}
-	case RTC_WIE_ON:	/* Allow watchdog interrupts.	*/
-	{
-		unsigned long flags;
-		unsigned char val;
-
-		if (!capable(CAP_SYS_TIME))
-			return -EACCES;
-
-		spin_lock_irqsave(&ds1286_lock, flags);
-		val = rtc_read(RTC_CMD);
-		val &= ~RTC_WAM;
-		rtc_write(val, RTC_CMD);
-		spin_unlock_irqrestore(&ds1286_lock, flags);
-
-		return 0;
-	}
-	case RTC_ALM_READ:	/* Read the present alarm time */
-	{
-		/*
-		 * This returns a struct rtc_time. Reading >= 0xc0
-		 * means "don't care" or "match all". Only the tm_hour,
-		 * tm_min, and tm_sec values are filled in.
-		 */
-
-		memset(&wtime, 0, sizeof(wtime));
-		ds1286_get_alm_time(&wtime);
-		break;
-	}
-	case RTC_ALM_SET:	/* Store a time into the alarm */
-	{
-		/*
-		 * This expects a struct rtc_time. Writing 0xff means
-		 * "don't care" or "match all". Only the tm_hour,
-		 * tm_min and tm_sec are used.
-		 */
-		unsigned char hrs, min, sec;
-		struct rtc_time alm_tm;
-
-		if (!capable(CAP_SYS_TIME))
-			return -EACCES;
-
-		if (copy_from_user(&alm_tm, (struct rtc_time*)arg,
-				   sizeof(struct rtc_time)))
-			return -EFAULT;
-
-		hrs = alm_tm.tm_hour;
-		min = alm_tm.tm_min;
-		sec = alm_tm.tm_sec;
-
-		if (hrs >= 24)
-			hrs = 0xff;
-
-		if (min >= 60)
-			min = 0xff;
-
-		if (sec != 0)
-			return -EINVAL;
-
-		min = bin2bcd(min);
-		min = bin2bcd(hrs);
-
-		spin_lock(&ds1286_lock);
-		rtc_write(hrs, RTC_HOURS_ALARM);
-		rtc_write(min, RTC_MINUTES_ALARM);
-		spin_unlock(&ds1286_lock);
-
-		return 0;
-	}
-	case RTC_RD_TIME:	/* Read the time/date from RTC	*/
-	{
-		memset(&wtime, 0, sizeof(wtime));
-		ds1286_get_time(&wtime);
-		break;
-	}
-	case RTC_SET_TIME:	/* Set the RTC */
-	{
-		struct rtc_time rtc_tm;
-
-		if (!capable(CAP_SYS_TIME))
-			return -EACCES;
-
-		if (copy_from_user(&rtc_tm, (struct rtc_time*)arg,
-				   sizeof(struct rtc_time)))
-			return -EFAULT;
-
-		return ds1286_set_time(&rtc_tm);
-	}
-	default:
-		return -EINVAL;
-	}
-	return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0;
-}
-
-/*
- *	We enforce only one user at a time here with the open/close.
- *	Also clear the previous interrupt data on an open, and clean
- *	up things on a close.
- */
-
-static int ds1286_open(struct inode *inode, struct file *file)
-{
-	lock_kernel();
-	spin_lock_irq(&ds1286_lock);
-
-	if (ds1286_status & RTC_IS_OPEN)
-		goto out_busy;
-
-	ds1286_status |= RTC_IS_OPEN;
-
-	spin_unlock_irq(&ds1286_lock);
-	unlock_kernel();
-	return 0;
-
-out_busy:
-	spin_lock_irq(&ds1286_lock);
-	unlock_kernel();
-	return -EBUSY;
-}
-
-static int ds1286_release(struct inode *inode, struct file *file)
-{
-	ds1286_status &= ~RTC_IS_OPEN;
-
-	return 0;
-}
-
-static unsigned int ds1286_poll(struct file *file, poll_table *wait)
-{
-	poll_wait(file, &ds1286_wait, wait);
-
-	return 0;
-}
-
-/*
- *	The various file operations we support.
- */
-
-static const struct file_operations ds1286_fops = {
-	.llseek		= no_llseek,
-	.read		= ds1286_read,
-	.poll		= ds1286_poll,
-	.ioctl		= ds1286_ioctl,
-	.open		= ds1286_open,
-	.release	= ds1286_release,
-};
-
-static struct miscdevice ds1286_dev=
-{
-	.minor	= RTC_MINOR,
-	.name	= "rtc",
-	.fops	= &ds1286_fops,
-};
-
-static int __init ds1286_init(void)
-{
-	int err;
-
-	printk(KERN_INFO "DS1286 Real Time Clock Driver v%s\n", DS1286_VERSION);
-
-	err = misc_register(&ds1286_dev);
-	if (err)
-		goto out;
-
-	if (!create_proc_read_entry("driver/rtc", 0, 0, ds1286_read_proc, NULL)) {
-		err = -ENOMEM;
-
-		goto out_deregister;
-	}
-
-	return 0;
-
-out_deregister:
-	misc_deregister(&ds1286_dev);
-
-out:
-	return err;
-}
-
-static void __exit ds1286_exit(void)
-{
-	remove_proc_entry("driver/rtc", NULL);
-	misc_deregister(&ds1286_dev);
-}
-
-static char *days[] = {
-	"***", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
-};
-
-/*
- *	Info exported via "/proc/rtc".
- */
-static int ds1286_proc_output(char *buf)
-{
-	char *p, *s;
-	struct rtc_time tm;
-	unsigned char hundredth, month, cmd, amode;
-
-	p = buf;
-
-	ds1286_get_time(&tm);
-	hundredth = rtc_read(RTC_HUNDREDTH_SECOND);
-	hundredth = bcd2bin(hundredth);
-
-	p += sprintf(p,
-	             "rtc_time\t: %02d:%02d:%02d.%02d\n"
-	             "rtc_date\t: %04d-%02d-%02d\n",
-		     tm.tm_hour, tm.tm_min, tm.tm_sec, hundredth,
-		     tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
-
-	/*
-	 * We implicitly assume 24hr mode here. Alarm values >= 0xc0 will
-	 * match any value for that particular field. Values that are
-	 * greater than a valid time, but less than 0xc0 shouldn't appear.
-	 */
-	ds1286_get_alm_time(&tm);
-	p += sprintf(p, "alarm\t\t: %s ", days[tm.tm_wday]);
-	if (tm.tm_hour <= 24)
-		p += sprintf(p, "%02d:", tm.tm_hour);
-	else
-		p += sprintf(p, "**:");
-
-	if (tm.tm_min <= 59)
-		p += sprintf(p, "%02d\n", tm.tm_min);
-	else
-		p += sprintf(p, "**\n");
-
-	month = rtc_read(RTC_MONTH);
-	p += sprintf(p,
-	             "oscillator\t: %s\n"
-	             "square_wave\t: %s\n",
-	             (month & RTC_EOSC) ? "disabled" : "enabled",
-	             (month & RTC_ESQW) ? "disabled" : "enabled");
-
-	amode = ((rtc_read(RTC_MINUTES_ALARM) & 0x80) >> 5) |
-	        ((rtc_read(RTC_HOURS_ALARM) & 0x80) >> 6) |
-	        ((rtc_read(RTC_DAY_ALARM) & 0x80) >> 7);
-	if (amode == 7)      s = "each minute";
-	else if (amode == 3) s = "minutes match";
-	else if (amode == 1) s = "hours and minutes match";
-	else if (amode == 0) s = "days, hours and minutes match";
-	else                 s = "invalid";
-	p += sprintf(p, "alarm_mode\t: %s\n", s);
-
-	cmd = rtc_read(RTC_CMD);
-	p += sprintf(p,
-	             "alarm_enable\t: %s\n"
-	             "wdog_alarm\t: %s\n"
-	             "alarm_mask\t: %s\n"
-	             "wdog_alarm_mask\t: %s\n"
-	             "interrupt_mode\t: %s\n"
-	             "INTB_mode\t: %s_active\n"
-	             "interrupt_pins\t: %s\n",
-		     (cmd & RTC_TDF) ? "yes" : "no",
-		     (cmd & RTC_WAF) ? "yes" : "no",
-		     (cmd & RTC_TDM) ? "disabled" : "enabled",
-		     (cmd & RTC_WAM) ? "disabled" : "enabled",
-		     (cmd & RTC_PU_LVL) ? "pulse" : "level",
-		     (cmd & RTC_IBH_LO) ? "low" : "high",
-	             (cmd & RTC_IPSW) ? "unswapped" : "swapped");
-
-	return  p - buf;
-}
-
-static int ds1286_read_proc(char *page, char **start, off_t off,
-                         int count, int *eof, void *data)
-{
-	int len = ds1286_proc_output (page);
-	if (len <= off+count) *eof = 1;
-	*start = page + off;
-	len -= off;
-	if (len>count)
-		len = count;
-	if (len<0)
-		len = 0;
-
-	return len;
-}
-
-/*
- * Returns true if a clock update is in progress
- */
-static inline unsigned char ds1286_is_updating(void)
-{
-	return rtc_read(RTC_CMD) & RTC_TE;
-}
-
-
-static void ds1286_get_time(struct rtc_time *rtc_tm)
-{
-	unsigned char save_control;
-	unsigned long flags;
-
-	/*
-	 * read RTC once any update in progress is done. The update
-	 * can take just over 2ms. We wait 10 to 20ms. There is no need to
-	 * to poll-wait (up to 1s - eeccch) for the falling edge of RTC_UIP.
-	 * If you need to know *exactly* when a second has started, enable
-	 * periodic update complete interrupts, (via ioctl) and then
-	 * immediately read /dev/rtc which will block until you get the IRQ.
-	 * Once the read clears, read the RTC time (again via ioctl). Easy.
-	 */
-
-	if (ds1286_is_updating() != 0)
-		msleep(20);
-
-	/*
-	 * Only the values that we read from the RTC are set. We leave
-	 * tm_wday, tm_yday and tm_isdst untouched. Even though the
-	 * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
-	 * by the RTC when initially set to a non-zero value.
-	 */
-	spin_lock_irqsave(&ds1286_lock, flags);
-	save_control = rtc_read(RTC_CMD);
-	rtc_write((save_control|RTC_TE), RTC_CMD);
-
-	rtc_tm->tm_sec = rtc_read(RTC_SECONDS);
-	rtc_tm->tm_min = rtc_read(RTC_MINUTES);
-	rtc_tm->tm_hour = rtc_read(RTC_HOURS) & 0x3f;
-	rtc_tm->tm_mday = rtc_read(RTC_DATE);
-	rtc_tm->tm_mon = rtc_read(RTC_MONTH) & 0x1f;
-	rtc_tm->tm_year = rtc_read(RTC_YEAR);
-
-	rtc_write(save_control, RTC_CMD);
-	spin_unlock_irqrestore(&ds1286_lock, flags);
-
-	rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
-	rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
-	rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
-	rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
-	rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
-	rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
-
-	/*
-	 * Account for differences between how the RTC uses the values
-	 * and how they are defined in a struct rtc_time;
-	 */
-	if (rtc_tm->tm_year < 45)
-		rtc_tm->tm_year += 30;
-	if ((rtc_tm->tm_year += 40) < 70)
-		rtc_tm->tm_year += 100;
-
-	rtc_tm->tm_mon--;
-}
-
-static int ds1286_set_time(struct rtc_time *rtc_tm)
-{
-	unsigned char mon, day, hrs, min, sec, leap_yr;
-	unsigned char save_control;
-	unsigned int yrs;
-	unsigned long flags;
-
-
-	yrs = rtc_tm->tm_year + 1900;
-	mon = rtc_tm->tm_mon + 1;   /* tm_mon starts at zero */
-	day = rtc_tm->tm_mday;
-	hrs = rtc_tm->tm_hour;
-	min = rtc_tm->tm_min;
-	sec = rtc_tm->tm_sec;
-
-	if (yrs < 1970)
-		return -EINVAL;
-
-	leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
-
-	if ((mon > 12) || (day == 0))
-		return -EINVAL;
-
-	if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
-		return -EINVAL;
-
-	if ((hrs >= 24) || (min >= 60) || (sec >= 60))
-		return -EINVAL;
-
-	if ((yrs -= 1940) > 255)    /* They are unsigned */
-		return -EINVAL;
-
-	if (yrs >= 100)
-		yrs -= 100;
-
-	sec = bin2bcd(sec);
-	min = bin2bcd(min);
-	hrs = bin2bcd(hrs);
-	day = bin2bcd(day);
-	mon = bin2bcd(mon);
-	yrs = bin2bcd(yrs);
-
-	spin_lock_irqsave(&ds1286_lock, flags);
-	save_control = rtc_read(RTC_CMD);
-	rtc_write((save_control|RTC_TE), RTC_CMD);
-
-	rtc_write(yrs, RTC_YEAR);
-	rtc_write(mon, RTC_MONTH);
-	rtc_write(day, RTC_DATE);
-	rtc_write(hrs, RTC_HOURS);
-	rtc_write(min, RTC_MINUTES);
-	rtc_write(sec, RTC_SECONDS);
-	rtc_write(0, RTC_HUNDREDTH_SECOND);
-
-	rtc_write(save_control, RTC_CMD);
-	spin_unlock_irqrestore(&ds1286_lock, flags);
-
-	return 0;
-}
-
-static void ds1286_get_alm_time(struct rtc_time *alm_tm)
-{
-	unsigned char cmd;
-	unsigned long flags;
-
-	/*
-	 * Only the values that we read from the RTC are set. That
-	 * means only tm_wday, tm_hour, tm_min.
-	 */
-	spin_lock_irqsave(&ds1286_lock, flags);
-	alm_tm->tm_min = rtc_read(RTC_MINUTES_ALARM) & 0x7f;
-	alm_tm->tm_hour = rtc_read(RTC_HOURS_ALARM)  & 0x1f;
-	alm_tm->tm_wday = rtc_read(RTC_DAY_ALARM)    & 0x07;
-	cmd = rtc_read(RTC_CMD);
-	spin_unlock_irqrestore(&ds1286_lock, flags);
-
-	alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
-	alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
-	alm_tm->tm_sec = 0;
-}
-
-module_init(ds1286_init);
-module_exit(ds1286_exit);
-
-MODULE_AUTHOR("Ralf Baechle");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(RTC_MINOR);

drivers/char/ip27-rtc.c

-/*
- *	Driver for the SGS-Thomson M48T35 Timekeeper RAM chip
- *
- *	Real Time Clock interface for Linux
- *
- *	TODO: Implement periodic interrupts.
- *
- *	Copyright (C) 2000 Silicon Graphics, Inc.
- *	Written by Ulf Carlsson (ulfc@engr.sgi.com)
- *
- *	Based on code written by Paul Gortmaker.
- *
- *	This driver allows use of the real time clock (built into
- *	nearly all computers) from user space. It exports the /dev/rtc
- *	interface supporting various ioctl() and also the /proc/rtc
- *	pseudo-file for status information.
- *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License
- *	as published by the Free Software Foundation; either version
- *	2 of the License, or (at your option) any later version.
- *
- */
-
-#define RTC_VERSION		"1.09b"
-
-#include <linux/bcd.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/smp_lock.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/ioport.h>
-#include <linux/fcntl.h>
-#include <linux/rtc.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-
-#include <asm/m48t35.h>
-#include <asm/sn/ioc3.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/sn/klconfig.h>
-#include <asm/sn/sn0/ip27.h>
-#include <asm/sn/sn0/hub.h>
-#include <asm/sn/sn_private.h>
-
-static long rtc_ioctl(struct file *filp, unsigned int cmd,
-			unsigned long arg);
-
-static int rtc_read_proc(char *page, char **start, off_t off,
-                         int count, int *eof, void *data);
-
-static void get_rtc_time(struct rtc_time *rtc_tm);
-
-/*
- *	Bits in rtc_status. (6 bits of room for future expansion)
- */
-
-#define RTC_IS_OPEN		0x01	/* means /dev/rtc is in use	*/
-#define RTC_TIMER_ON		0x02	/* missed irq timer active	*/
-
-static unsigned char rtc_status;	/* bitmapped status byte.	*/
-static unsigned long rtc_freq;	/* Current periodic IRQ rate	*/
-static struct m48t35_rtc *rtc;
-
-/*
- *	If this driver ever becomes modularised, it will be really nice
- *	to make the epoch retain its value across module reload...
- */
-
-static unsigned long epoch = 1970;	/* year corresponding to 0x00	*/
-
-static const unsigned char days_in_mo[] =
-{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
-
-static long rtc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
-
-	struct rtc_time wtime;
-
-	switch (cmd) {
-	case RTC_RD_TIME:	/* Read the time/date from RTC	*/
-	{
-		get_rtc_time(&wtime);
-		break;
-	}
-	case RTC_SET_TIME:	/* Set the RTC */
-	{
-		struct rtc_time rtc_tm;
-		unsigned char mon, day, hrs, min, sec, leap_yr;
-		unsigned int yrs;
-
-		if (!capable(CAP_SYS_TIME))
-			return -EACCES;
-
-		if (copy_from_user(&rtc_tm, (struct rtc_time*)arg,
-				   sizeof(struct rtc_time)))
-			return -EFAULT;
-
-		yrs = rtc_tm.tm_year + 1900;
-		mon = rtc_tm.tm_mon + 1;   /* tm_mon starts at zero */
-		day = rtc_tm.tm_mday;
-		hrs = rtc_tm.tm_hour;
-		min = rtc_tm.tm_min;
-		sec = rtc_tm.tm_sec;
-
-		if (yrs < 1970)
-			return -EINVAL;
-
-		leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
-
-		if ((mon > 12) || (day == 0))
-			return -EINVAL;
-
-		if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
-			return -EINVAL;
-
-		if ((hrs >= 24) || (min >= 60) || (sec >= 60))
-			return -EINVAL;
-
-		if ((yrs -= epoch) > 255)    /* They are unsigned */
-			return -EINVAL;
-
-		if (yrs > 169)
-			return -EINVAL;
-
-		if (yrs >= 100)
-			yrs -= 100;
-
-		sec = bin2bcd(sec);
-		min = bin2bcd(min);
-		hrs = bin2bcd(hrs);
-		day = bin2bcd(day);
-		mon = bin2bcd(mon);
-		yrs = bin2bcd(yrs);
-
-		spin_lock_irq(&rtc_lock);
-		rtc->control |= M48T35_RTC_SET;
-		rtc->year = yrs;
-		rtc->month = mon;
-		rtc->date = day;
-		rtc->hour = hrs;
-		rtc->min = min;
-		rtc->sec = sec;
-		rtc->control &= ~M48T35_RTC_SET;
-		spin_unlock_irq(&rtc_lock);
-
-		return 0;
-	}
-	default:
-		return -EINVAL;
-	}
-	return copy_to_user((void *)arg, &wtime, sizeof wtime) ? -EFAULT : 0;
-}
-
-/*
- *	We enforce only one user at a time here with the open/close.
- *	Also clear the previous interrupt data on an open, and clean
- *	up things on a close.
- */
-
-static int rtc_open(struct inode *inode, struct file *file)
-{
-	lock_kernel();
-	spin_lock_irq(&rtc_lock);
-
-	if (rtc_status & RTC_IS_OPEN) {
-		spin_unlock_irq(&rtc_lock);
-		unlock_kernel();
-		return -EBUSY;
-	}
-
-	rtc_status |= RTC_IS_OPEN;
-	spin_unlock_irq(&rtc_lock);
-	unlock_kernel();
-
-	return 0;
-}
-
-static int rtc_release(struct inode *inode, struct file *file)
-{
-	/*
-	 * Turn off all interrupts once the device is no longer
-	 * in use, and clear the data.
-	 */
-
-	spin_lock_irq(&rtc_lock);
-	rtc_status &= ~RTC_IS_OPEN;
-	spin_unlock_irq(&rtc_lock);
-
-	return 0;
-}
-
-/*
- *	The various file operations we support.
- */
-
-static const struct file_operations rtc_fops = {
-	.owner		= THIS_MODULE,
-	.unlocked_ioctl	= rtc_ioctl,
-	.open		= rtc_open,
-	.release	= rtc_release,
-};
-
-static struct miscdevice rtc_dev=
-{
-	RTC_MINOR,
-	"rtc",
-	&rtc_fops
-};
-
-static int __init rtc_init(void)
-{
-	rtc = (struct m48t35_rtc *)
-	(KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base + IOC3_BYTEBUS_DEV0);
-
-	printk(KERN_INFO "Real Time Clock Driver v%s\n", RTC_VERSION);
-	if (misc_register(&rtc_dev)) {
-		printk(KERN_ERR "rtc: cannot register misc device.\n");
-		return -ENODEV;
-	}
-	if (!create_proc_read_entry("driver/rtc", 0, NULL, rtc_read_proc, NULL)) {
-		printk(KERN_ERR "rtc: cannot create /proc/rtc.\n");
-		misc_deregister(&rtc_dev);
-		return -ENOENT;
-	}
-
-	rtc_freq = 1024;
-
-	return 0;
-}
-
-static void __exit rtc_exit (void)
-{
-	/* interrupts and timer disabled at this point by rtc_release */
-
-	remove_proc_entry ("rtc", NULL);
-	misc_deregister(&rtc_dev);
-}
-
-module_init(rtc_init);
-module_exit(rtc_exit);
-
-/*
- *	Info exported via "/proc/rtc".
- */
-
-static int rtc_get_status(char *buf)
-{
-	char *p;
-	struct rtc_time tm;
-
-	/*
-	 * Just emulate the standard /proc/rtc
-	 */
-
-	p = buf;
-
-	get_rtc_time(&tm);
-
-	/*
-	 * There is no way to tell if the luser has the RTC set for local
-	 * time or for Universal Standard Time (GMT). Probably local though.
-	 */
-	p += sprintf(p,
-		     "rtc_time\t: %02d:%02d:%02d\n"
-		     "rtc_date\t: %04d-%02d-%02d\n"
-	 	     "rtc_epoch\t: %04lu\n"
-		     "24hr\t\t: yes\n",
-		     tm.tm_hour, tm.tm_min, tm.tm_sec,
-		     tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, epoch);
-
-	return  p - buf;
-}
-
-static int rtc_read_proc(char *page, char **start, off_t off,
-                                 int count, int *eof, void *data)
-{
-        int len = rtc_get_status(page);
-        if (len <= off+count) *eof = 1;
-        *start = page + off;
-        len -= off;
-        if (len>count) len = count;
-        if (len<0) len = 0;
-        return len;
-}
-
-static void get_rtc_time(struct rtc_time *rtc_tm)
-{
-	/*
-	 * Do we need to wait for the last update to finish?
-	 */
-
-	/*
-	 * Only the values that we read from the RTC are set. We leave
-	 * tm_wday, tm_yday and tm_isdst untouched. Even though the
-	 * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
-	 * by the RTC when initially set to a non-zero value.
-	 */
-	spin_lock_irq(&rtc_lock);
-	rtc->control |= M48T35_RTC_READ;
-	rtc_tm->tm_sec = rtc->sec;
-	rtc_tm->tm_min = rtc->min;
-	rtc_tm->tm_hour = rtc->hour;
-	rtc_tm->tm_mday = rtc->date;
-	rtc_tm->tm_mon = rtc->month;
-	rtc_tm->tm_year = rtc->year;
-	rtc->control &= ~M48T35_RTC_READ;
-	spin_unlock_irq(&rtc_lock);
-
-	rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
-	rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
-	rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
-	rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
-	rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
-	rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
-
-	/*
-	 * Account for differences between how the RTC uses the values
-	 * and how they are defined in a struct rtc_time;
-	 */
-	if ((rtc_tm->tm_year += (epoch - 1900)) <= 69)
-		rtc_tm->tm_year += 100;
-
-	rtc_tm->tm_mon--;
-}