arch/sparc/include/asm/leon.h - arm/linux - Git at Google

 /*
  * Copyright (C) 2004 Konrad Eisele (eiselekd@web.de,konrad@gaisler.com) Gaisler Research
  * Copyright (C) 2004 Stefan Holst (mail@s-holst.de) Uni-Stuttgart
  * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
  * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
  */

 #ifndef LEON_H_INCLUDE
 #define LEON_H_INCLUDE

 #ifdef CONFIG_SPARC_LEON

 #define ASI_LEON_NOCACHE	0x01

 #define ASI_LEON_DCACHE_MISS	0x1

 #define ASI_LEON_CACHEREGS	0x02
 #define ASI_LEON_IFLUSH		0x10
 #define ASI_LEON_DFLUSH		0x11

 #define ASI_LEON_MMUFLUSH	0x18
 #define ASI_LEON_MMUREGS	0x19
 #define ASI_LEON_BYPASS		0x1c
 #define ASI_LEON_FLUSH_PAGE	0x10

 /* mmu register access, ASI_LEON_MMUREGS */
 #define LEON_CNR_CTRL		0x000
 #define LEON_CNR_CTXP		0x100
 #define LEON_CNR_CTX		0x200
 #define LEON_CNR_F		0x300
 #define LEON_CNR_FADDR		0x400

 #define LEON_CNR_CTX_NCTX	256	/*number of MMU ctx */

 #define LEON_CNR_CTRL_TLBDIS	0x80000000

 #define LEON_MMUTLB_ENT_MAX	64

 /*
  * diagnostic access from mmutlb.vhd:
  * 0: pte address
  * 4: pte
  * 8: additional flags
  */
 #define LEON_DIAGF_LVL		0x3
 #define LEON_DIAGF_WR		0x8
 #define LEON_DIAGF_WR_SHIFT	3
 #define LEON_DIAGF_HIT		0x10
 #define LEON_DIAGF_HIT_SHIFT	4
 #define LEON_DIAGF_CTX		0x1fe0
 #define LEON_DIAGF_CTX_SHIFT	5
 #define LEON_DIAGF_VALID	0x2000
 #define LEON_DIAGF_VALID_SHIFT	13

 /*
  *  Interrupt Sources
  *
  *  The interrupt source numbers directly map to the trap type and to
  *  the bits used in the Interrupt Clear, Interrupt Force, Interrupt Mask,
  *  and the Interrupt Pending Registers.
  */
 #define LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR	1
 #define LEON_INTERRUPT_UART_1_RX_TX		2
 #define LEON_INTERRUPT_UART_0_RX_TX		3
 #define LEON_INTERRUPT_EXTERNAL_0		4
 #define LEON_INTERRUPT_EXTERNAL_1		5
 #define LEON_INTERRUPT_EXTERNAL_2		6
 #define LEON_INTERRUPT_EXTERNAL_3		7
 #define LEON_INTERRUPT_TIMER1			8
 #define LEON_INTERRUPT_TIMER2			9
 #define LEON_INTERRUPT_EMPTY1			10
 #define LEON_INTERRUPT_EMPTY2			11
 #define LEON_INTERRUPT_OPEN_ETH			12
 #define LEON_INTERRUPT_EMPTY4			13
 #define LEON_INTERRUPT_EMPTY5			14
 #define LEON_INTERRUPT_EMPTY6			15

 /* irq masks */
 #define LEON_HARD_INT(x)	(1 << (x))	/* irq 0-15 */
 #define LEON_IRQMASK_R		0x0000fffe	/* bit 15- 1 of lregs.irqmask */
 #define LEON_IRQPRIO_R		0xfffe0000	/* bit 31-17 of lregs.irqmask */

 /* leon uart register definitions */
 #define LEON_OFF_UDATA	0x0
 #define LEON_OFF_USTAT	0x4
 #define LEON_OFF_UCTRL	0x8
 #define LEON_OFF_USCAL	0xc

 #define LEON_UCTRL_RE	0x01
 #define LEON_UCTRL_TE	0x02
 #define LEON_UCTRL_RI	0x04
 #define LEON_UCTRL_TI	0x08
 #define LEON_UCTRL_PS	0x10
 #define LEON_UCTRL_PE	0x20
 #define LEON_UCTRL_FL	0x40
 #define LEON_UCTRL_LB	0x80

 #define LEON_USTAT_DR	0x01
 #define LEON_USTAT_TS	0x02
 #define LEON_USTAT_TH	0x04
 #define LEON_USTAT_BR	0x08
 #define LEON_USTAT_OV	0x10
 #define LEON_USTAT_PE	0x20
 #define LEON_USTAT_FE	0x40

 #define LEON_MCFG2_SRAMDIS		0x00002000
 #define LEON_MCFG2_SDRAMEN		0x00004000
 #define LEON_MCFG2_SRAMBANKSZ		0x00001e00	/* [12-9] */
 #define LEON_MCFG2_SRAMBANKSZ_SHIFT	9
 #define LEON_MCFG2_SDRAMBANKSZ		0x03800000	/* [25-23] */
 #define LEON_MCFG2_SDRAMBANKSZ_SHIFT	23

 #define LEON_TCNT0_MASK	0x7fffff

 #define LEON_USTAT_ERROR (LEON_USTAT_OV | LEON_USTAT_PE | LEON_USTAT_FE)
 /* no break yet */

 #define ASI_LEON3_SYSCTRL		0x02
 #define ASI_LEON3_SYSCTRL_ICFG		0x08
 #define ASI_LEON3_SYSCTRL_DCFG		0x0c
 #define ASI_LEON3_SYSCTRL_CFG_SNOOPING (1 << 27)
 #define ASI_LEON3_SYSCTRL_CFG_SSIZE(c) (1 << ((c >> 20) & 0xf))

 #ifndef __ASSEMBLY__

 /* do a virtual address read without cache */
 static inline unsigned long leon_readnobuffer_reg(unsigned long paddr)
 {
 	unsigned long retval;
 	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
 			     "=r"(retval) : "r"(paddr), "i"(ASI_LEON_NOCACHE));
 	return retval;
 }

 /* do a physical address bypass write, i.e. for 0x80000000 */
 static inline void leon_store_reg(unsigned long paddr, unsigned long value)
 {
 	__asm__ __volatile__("sta %0, [%1] %2\n\t" : : "r"(value), "r"(paddr),
 			     "i"(ASI_LEON_BYPASS) : "memory");
 }

 /* do a physical address bypass load, i.e. for 0x80000000 */
 static inline unsigned long leon_load_reg(unsigned long paddr)
 {
 	unsigned long retval;
 	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
 			     "=r"(retval) : "r"(paddr), "i"(ASI_LEON_BYPASS));
 	return retval;
 }

 static inline void leon_srmmu_disabletlb(void)
 {
 	unsigned int retval;
 	__asm__ __volatile__("lda [%%g0] %2, %0\n\t" : "=r"(retval) : "r"(0),
 			     "i"(ASI_LEON_MMUREGS));
 	retval |= LEON_CNR_CTRL_TLBDIS;
 	__asm__ __volatile__("sta %0, [%%g0] %2\n\t" : : "r"(retval), "r"(0),
 			     "i"(ASI_LEON_MMUREGS) : "memory");
 }

 static inline void leon_srmmu_enabletlb(void)
 {
 	unsigned int retval;
 	__asm__ __volatile__("lda [%%g0] %2, %0\n\t" : "=r"(retval) : "r"(0),
 			     "i"(ASI_LEON_MMUREGS));
 	retval = retval & ~LEON_CNR_CTRL_TLBDIS;
 	__asm__ __volatile__("sta %0, [%%g0] %2\n\t" : : "r"(retval), "r"(0),
 			     "i"(ASI_LEON_MMUREGS) : "memory");
 }

 /* macro access for leon_load_reg() and leon_store_reg() */
 #define LEON3_BYPASS_LOAD_PA(x)	    (leon_load_reg((unsigned long)(x)))
 #define LEON3_BYPASS_STORE_PA(x, v) (leon_store_reg((unsigned long)(x), (unsigned long)(v)))
 #define LEON3_BYPASS_ANDIN_PA(x, v) LEON3_BYPASS_STORE_PA(x, LEON3_BYPASS_LOAD_PA(x) & v)
 #define LEON3_BYPASS_ORIN_PA(x, v)  LEON3_BYPASS_STORE_PA(x, LEON3_BYPASS_LOAD_PA(x) | v)
 #define LEON_BYPASS_LOAD_PA(x)      leon_load_reg((unsigned long)(x))
 #define LEON_BYPASS_STORE_PA(x, v)  leon_store_reg((unsigned long)(x), (unsigned long)(v))
 #define LEON_REGLOAD_PA(x)          leon_load_reg((unsigned long)(x)+LEON_PREGS)
 #define LEON_REGSTORE_PA(x, v)      leon_store_reg((unsigned long)(x)+LEON_PREGS, (unsigned long)(v))
 #define LEON_REGSTORE_OR_PA(x, v)   LEON_REGSTORE_PA(x, LEON_REGLOAD_PA(x) | (unsigned long)(v))
 #define LEON_REGSTORE_AND_PA(x, v)  LEON_REGSTORE_PA(x, LEON_REGLOAD_PA(x) & (unsigned long)(v))

 /* macro access for leon_readnobuffer_reg() */
 #define LEON_BYPASSCACHE_LOAD_VA(x) leon_readnobuffer_reg((unsigned long)(x))

 extern void sparc_leon_eirq_register(int eirq);
 extern void leon_init(void);
 extern void leon_switch_mm(void);
 extern void leon_init_IRQ(void);

 extern unsigned long last_valid_pfn;

 static inline unsigned long sparc_leon3_get_dcachecfg(void)
 {
 	unsigned int retval;
 	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
 			     "=r"(retval) :
 			     "r"(ASI_LEON3_SYSCTRL_DCFG),
 			     "i"(ASI_LEON3_SYSCTRL));
 	return retval;
 }

 /* enable snooping */
 static inline void sparc_leon3_enable_snooping(void)
 {
 	__asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
 			  "set 0x800000, %%l2\n\t"
 			  "or  %%l2, %%l1, %%l2\n\t"
 			  "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
 };

 static inline int sparc_leon3_snooping_enabled(void)
 {
 	u32 cctrl;
 	__asm__ __volatile__("lda [%%g0] 2, %0\n\t" : "=r"(cctrl));
         return (cctrl >> 23) & 1;
 };

 static inline void sparc_leon3_disable_cache(void)
 {
 	__asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
 			  "set 0x00000f, %%l2\n\t"
 			  "andn  %%l2, %%l1, %%l2\n\t"
 			  "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
 };

 static inline unsigned long sparc_leon3_asr17(void)
 {
 	u32 asr17;
 	__asm__ __volatile__ ("rd %%asr17, %0\n\t" : "=r"(asr17));
 	return asr17;
 };

 static inline int sparc_leon3_cpuid(void)
 {
 	return sparc_leon3_asr17() >> 28;
 }

 #endif /*!__ASSEMBLY__*/

 #ifdef CONFIG_SMP
 # define LEON3_IRQ_RESCHEDULE		13
 # define LEON3_IRQ_TICKER		(leon_percpu_timer_dev[0].irq)
 # define LEON3_IRQ_CROSS_CALL		15
 #endif

 #if defined(PAGE_SIZE_LEON_8K)
 #define LEON_PAGE_SIZE_LEON 1
 #elif defined(PAGE_SIZE_LEON_16K)
 #define LEON_PAGE_SIZE_LEON 2)
 #else
 #define LEON_PAGE_SIZE_LEON 0
 #endif

 #if LEON_PAGE_SIZE_LEON == 0
 /* [ 8, 6, 6 ] + 12 */
 #define LEON_PGD_SH    24
 #define LEON_PGD_M     0xff
 #define LEON_PMD_SH    18
 #define LEON_PMD_SH_V  (LEON_PGD_SH-2)
 #define LEON_PMD_M     0x3f
 #define LEON_PTE_SH    12
 #define LEON_PTE_M     0x3f
 #elif LEON_PAGE_SIZE_LEON == 1
 /* [ 7, 6, 6 ] + 13 */
 #define LEON_PGD_SH    25
 #define LEON_PGD_M     0x7f
 #define LEON_PMD_SH    19
 #define LEON_PMD_SH_V  (LEON_PGD_SH-1)
 #define LEON_PMD_M     0x3f
 #define LEON_PTE_SH    13
 #define LEON_PTE_M     0x3f
 #elif LEON_PAGE_SIZE_LEON == 2
 /* [ 6, 6, 6 ] + 14 */
 #define LEON_PGD_SH    26
 #define LEON_PGD_M     0x3f
 #define LEON_PMD_SH    20
 #define LEON_PMD_SH_V  (LEON_PGD_SH-0)
 #define LEON_PMD_M     0x3f
 #define LEON_PTE_SH    14
 #define LEON_PTE_M     0x3f
 #elif LEON_PAGE_SIZE_LEON == 3
 /* [ 4, 7, 6 ] + 15 */
 #define LEON_PGD_SH    28
 #define LEON_PGD_M     0x0f
 #define LEON_PMD_SH    21
 #define LEON_PMD_SH_V  (LEON_PGD_SH-0)
 #define LEON_PMD_M     0x7f
 #define LEON_PTE_SH    15
 #define LEON_PTE_M     0x3f
 #else
 #error cannot determine LEON_PAGE_SIZE_LEON
 #endif

 #define PAGE_MIN_SHIFT   (12)
 #define PAGE_MIN_SIZE    (1UL << PAGE_MIN_SHIFT)

 #define LEON3_XCCR_SETS_MASK  0x07000000UL
 #define LEON3_XCCR_SSIZE_MASK 0x00f00000UL

 #define LEON2_CCR_DSETS_MASK 0x03000000UL
 #define LEON2_CFG_SSIZE_MASK 0x00007000UL

 #ifndef __ASSEMBLY__
 extern unsigned long srmmu_swprobe(unsigned long vaddr, unsigned long *paddr);
 extern void leon_flush_icache_all(void);
 extern void leon_flush_dcache_all(void);
 extern void leon_flush_cache_all(void);
 extern void leon_flush_tlb_all(void);
 extern int leon_flush_during_switch;
 extern int leon_flush_needed(void);

 struct vm_area_struct;
 extern void leon_flush_icache_all(void);
 extern void leon_flush_dcache_all(void);
 extern void leon_flush_pcache_all(struct vm_area_struct *vma, unsigned long page);
 extern void leon_flush_cache_all(void);
 extern void leon_flush_tlb_all(void);
 extern int leon_flush_during_switch;
 extern int leon_flush_needed(void);
 extern void leon_flush_pcache_all(struct vm_area_struct *vma, unsigned long page);

 /* struct that hold LEON3 cache configuration registers */
 struct leon3_cacheregs {
 	unsigned long ccr;	/* 0x00 - Cache Control Register  */
 	unsigned long iccr;     /* 0x08 - Instruction Cache Configuration Register */
 	unsigned long dccr;	/* 0x0c - Data Cache Configuration Register */
 };

 /* struct that hold LEON2 cache configuration register
  * & configuration register
  */
 struct leon2_cacheregs {
 	unsigned long ccr, cfg;
 };

 #ifdef __KERNEL__

 #include <linux/interrupt.h>

 struct device_node;
 extern int sparc_leon_eirq_get(int eirq, int cpu);
 extern irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id);
 extern void sparc_leon_eirq_register(int eirq);
 extern void leon_clear_clock_irq(void);
 extern void leon_load_profile_irq(int cpu, unsigned int limit);
 extern void leon_init_timers(irq_handler_t counter_fn);
 extern void leon_clear_clock_irq(void);
 extern void leon_load_profile_irq(int cpu, unsigned int limit);
 extern void leon_trans_init(struct device_node *dp);
 extern void leon_node_init(struct device_node *dp, struct device_node ***nextp);
 extern void leon_init_IRQ(void);
 extern void leon_init(void);
 extern unsigned long srmmu_swprobe(unsigned long vaddr, unsigned long *paddr);
 extern void init_leon(void);
 extern void poke_leonsparc(void);
 extern void leon3_getCacheRegs(struct leon3_cacheregs *regs);
 extern int leon_flush_needed(void);
 extern void leon_switch_mm(void);
 extern int srmmu_swprobe_trace;

 #ifdef CONFIG_SMP
 extern int leon_smp_nrcpus(void);
 extern void leon_clear_profile_irq(int cpu);
 extern void leon_smp_done(void);
 extern void leon_boot_cpus(void);
 extern int leon_boot_one_cpu(int i);
 void leon_init_smp(void);
 extern void cpu_probe(void);
 extern void cpu_idle(void);
 extern void init_IRQ(void);
 extern void cpu_panic(void);
 extern int __leon_processor_id(void);
 void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);

 extern unsigned int real_irq_entry[], smpleon_ticker[];
 extern unsigned int patchme_maybe_smp_msg[];
 extern unsigned long trapbase_cpu1[];
 extern unsigned long trapbase_cpu2[];
 extern unsigned long trapbase_cpu3[];
 extern unsigned int t_nmi[], linux_trap_ipi15_leon[];
 extern unsigned int linux_trap_ipi15_sun4m[];

 #endif /* CONFIG_SMP */

 #endif /* __KERNEL__ */

 #endif /* __ASSEMBLY__ */

 /* macros used in leon_mm.c */
 #define PFN(x)           ((x) >> PAGE_SHIFT)
 #define _pfn_valid(pfn)	 ((pfn < last_valid_pfn) && (pfn >= PFN(phys_base)))
 #define _SRMMU_PTE_PMASK_LEON 0xffffffff

 #else /* defined(CONFIG_SPARC_LEON) */

 /* nop definitions for !LEON case */
 #define leon_init() do {} while (0)
 #define leon_switch_mm() do {} while (0)
 #define leon_init_IRQ() do {} while (0)
 #define init_leon() do {} while (0)
 #define leon_smp_done() do {} while (0)
 #define leon_boot_cpus() do {} while (0)
 #define leon_boot_one_cpu(i) 1
 #define leon_init_smp() do {} while (0)

 #endif /* !defined(CONFIG_SPARC_LEON) */

 #endif
	/*
	* Copyright (C) 2004 Konrad Eisele (eiselekd@web.de,konrad@gaisler.com) Gaisler Research
	* Copyright (C) 2004 Stefan Holst (mail@s-holst.de) Uni-Stuttgart
	* Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
	* Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
	*/

	#ifndef LEON_H_INCLUDE
	#define LEON_H_INCLUDE

	#ifdef CONFIG_SPARC_LEON

	#define ASI_LEON_NOCACHE 0x01

	#define ASI_LEON_DCACHE_MISS 0x1

	#define ASI_LEON_CACHEREGS 0x02
	#define ASI_LEON_IFLUSH 0x10
	#define ASI_LEON_DFLUSH 0x11

	#define ASI_LEON_MMUFLUSH 0x18
	#define ASI_LEON_MMUREGS 0x19
	#define ASI_LEON_BYPASS 0x1c
	#define ASI_LEON_FLUSH_PAGE 0x10

	/* mmu register access, ASI_LEON_MMUREGS */
	#define LEON_CNR_CTRL 0x000
	#define LEON_CNR_CTXP 0x100
	#define LEON_CNR_CTX 0x200
	#define LEON_CNR_F 0x300
	#define LEON_CNR_FADDR 0x400

	#define LEON_CNR_CTX_NCTX 256 /number of MMU ctx /

	#define LEON_CNR_CTRL_TLBDIS 0x80000000

	#define LEON_MMUTLB_ENT_MAX 64

	/*
	* diagnostic access from mmutlb.vhd:
	* 0: pte address
	* 4: pte
	* 8: additional flags
	*/
	#define LEON_DIAGF_LVL 0x3
	#define LEON_DIAGF_WR 0x8
	#define LEON_DIAGF_WR_SHIFT 3
	#define LEON_DIAGF_HIT 0x10
	#define LEON_DIAGF_HIT_SHIFT 4
	#define LEON_DIAGF_CTX 0x1fe0
	#define LEON_DIAGF_CTX_SHIFT 5
	#define LEON_DIAGF_VALID 0x2000
	#define LEON_DIAGF_VALID_SHIFT 13

	/*
	* Interrupt Sources
	*
	* The interrupt source numbers directly map to the trap type and to
	* the bits used in the Interrupt Clear, Interrupt Force, Interrupt Mask,
	* and the Interrupt Pending Registers.
	*/
	#define LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR 1
	#define LEON_INTERRUPT_UART_1_RX_TX 2
	#define LEON_INTERRUPT_UART_0_RX_TX 3
	#define LEON_INTERRUPT_EXTERNAL_0 4
	#define LEON_INTERRUPT_EXTERNAL_1 5
	#define LEON_INTERRUPT_EXTERNAL_2 6
	#define LEON_INTERRUPT_EXTERNAL_3 7
	#define LEON_INTERRUPT_TIMER1 8
	#define LEON_INTERRUPT_TIMER2 9
	#define LEON_INTERRUPT_EMPTY1 10
	#define LEON_INTERRUPT_EMPTY2 11
	#define LEON_INTERRUPT_OPEN_ETH 12
	#define LEON_INTERRUPT_EMPTY4 13
	#define LEON_INTERRUPT_EMPTY5 14
	#define LEON_INTERRUPT_EMPTY6 15

	/* irq masks */
	#define LEON_HARD_INT(x) (1 << (x)) /* irq 0-15 */
	#define LEON_IRQMASK_R 0x0000fffe /* bit 15- 1 of lregs.irqmask */
	#define LEON_IRQPRIO_R 0xfffe0000 /* bit 31-17 of lregs.irqmask */

	/* leon uart register definitions */
	#define LEON_OFF_UDATA 0x0
	#define LEON_OFF_USTAT 0x4
	#define LEON_OFF_UCTRL 0x8
	#define LEON_OFF_USCAL 0xc

	#define LEON_UCTRL_RE 0x01
	#define LEON_UCTRL_TE 0x02
	#define LEON_UCTRL_RI 0x04
	#define LEON_UCTRL_TI 0x08
	#define LEON_UCTRL_PS 0x10
	#define LEON_UCTRL_PE 0x20
	#define LEON_UCTRL_FL 0x40
	#define LEON_UCTRL_LB 0x80

	#define LEON_USTAT_DR 0x01
	#define LEON_USTAT_TS 0x02
	#define LEON_USTAT_TH 0x04
	#define LEON_USTAT_BR 0x08
	#define LEON_USTAT_OV 0x10
	#define LEON_USTAT_PE 0x20
	#define LEON_USTAT_FE 0x40

	#define LEON_MCFG2_SRAMDIS 0x00002000
	#define LEON_MCFG2_SDRAMEN 0x00004000
	#define LEON_MCFG2_SRAMBANKSZ 0x00001e00 /* [12-9] */
	#define LEON_MCFG2_SRAMBANKSZ_SHIFT 9
	#define LEON_MCFG2_SDRAMBANKSZ 0x03800000 /* [25-23] */
	#define LEON_MCFG2_SDRAMBANKSZ_SHIFT 23

	#define LEON_TCNT0_MASK 0x7fffff

	#define LEON_USTAT_ERROR (LEON_USTAT_OV \| LEON_USTAT_PE \| LEON_USTAT_FE)
	/* no break yet */

	#define ASI_LEON3_SYSCTRL 0x02
	#define ASI_LEON3_SYSCTRL_ICFG 0x08
	#define ASI_LEON3_SYSCTRL_DCFG 0x0c
	#define ASI_LEON3_SYSCTRL_CFG_SNOOPING (1 << 27)
	#define ASI_LEON3_SYSCTRL_CFG_SSIZE(c) (1 << ((c >> 20) & 0xf))

	#ifndef __ASSEMBLY__

	/* do a virtual address read without cache */
	static inline unsigned long leon_readnobuffer_reg(unsigned long paddr)
	{
	unsigned long retval;
	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
	"=r"(retval) : "r"(paddr), "i"(ASI_LEON_NOCACHE));
	return retval;
	}

	/* do a physical address bypass write, i.e. for 0x80000000 */
	static inline void leon_store_reg(unsigned long paddr, unsigned long value)
	{
	__asm__ __volatile__("sta %0, [%1] %2\n\t" : : "r"(value), "r"(paddr),
	"i"(ASI_LEON_BYPASS) : "memory");
	}

	/* do a physical address bypass load, i.e. for 0x80000000 */
	static inline unsigned long leon_load_reg(unsigned long paddr)
	{
	unsigned long retval;
	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
	"=r"(retval) : "r"(paddr), "i"(ASI_LEON_BYPASS));
	return retval;
	}

	static inline void leon_srmmu_disabletlb(void)
	{
	unsigned int retval;
	__asm__ __volatile__("lda [%%g0] %2, %0\n\t" : "=r"(retval) : "r"(0),
	"i"(ASI_LEON_MMUREGS));
	retval \|= LEON_CNR_CTRL_TLBDIS;
	__asm__ __volatile__("sta %0, [%%g0] %2\n\t" : : "r"(retval), "r"(0),
	"i"(ASI_LEON_MMUREGS) : "memory");
	}

	static inline void leon_srmmu_enabletlb(void)
	{
	unsigned int retval;
	__asm__ __volatile__("lda [%%g0] %2, %0\n\t" : "=r"(retval) : "r"(0),
	"i"(ASI_LEON_MMUREGS));
	retval = retval & ~LEON_CNR_CTRL_TLBDIS;
	__asm__ __volatile__("sta %0, [%%g0] %2\n\t" : : "r"(retval), "r"(0),
	"i"(ASI_LEON_MMUREGS) : "memory");
	}

	/* macro access for leon_load_reg() and leon_store_reg() */
	#define LEON3_BYPASS_LOAD_PA(x) (leon_load_reg((unsigned long)(x)))
	#define LEON3_BYPASS_STORE_PA(x, v) (leon_store_reg((unsigned long)(x), (unsigned long)(v)))
	#define LEON3_BYPASS_ANDIN_PA(x, v) LEON3_BYPASS_STORE_PA(x, LEON3_BYPASS_LOAD_PA(x) & v)
	#define LEON3_BYPASS_ORIN_PA(x, v) LEON3_BYPASS_STORE_PA(x, LEON3_BYPASS_LOAD_PA(x) \| v)
	#define LEON_BYPASS_LOAD_PA(x) leon_load_reg((unsigned long)(x))
	#define LEON_BYPASS_STORE_PA(x, v) leon_store_reg((unsigned long)(x), (unsigned long)(v))
	#define LEON_REGLOAD_PA(x) leon_load_reg((unsigned long)(x)+LEON_PREGS)
	#define LEON_REGSTORE_PA(x, v) leon_store_reg((unsigned long)(x)+LEON_PREGS, (unsigned long)(v))
	#define LEON_REGSTORE_OR_PA(x, v) LEON_REGSTORE_PA(x, LEON_REGLOAD_PA(x) \| (unsigned long)(v))
	#define LEON_REGSTORE_AND_PA(x, v) LEON_REGSTORE_PA(x, LEON_REGLOAD_PA(x) & (unsigned long)(v))

	/* macro access for leon_readnobuffer_reg() */
	#define LEON_BYPASSCACHE_LOAD_VA(x) leon_readnobuffer_reg((unsigned long)(x))

	extern void sparc_leon_eirq_register(int eirq);
	extern void leon_init(void);
	extern void leon_switch_mm(void);
	extern void leon_init_IRQ(void);

	extern unsigned long last_valid_pfn;

	static inline unsigned long sparc_leon3_get_dcachecfg(void)
	{
	unsigned int retval;
	__asm__ __volatile__("lda [%1] %2, %0\n\t" :
	"=r"(retval) :
	"r"(ASI_LEON3_SYSCTRL_DCFG),
	"i"(ASI_LEON3_SYSCTRL));
	return retval;
	}

	/* enable snooping */
	static inline void sparc_leon3_enable_snooping(void)
	{
	__asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
	"set 0x800000, %%l2\n\t"
	"or %%l2, %%l1, %%l2\n\t"
	"sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
	};

	static inline int sparc_leon3_snooping_enabled(void)
	{
	u32 cctrl;
	__asm__ __volatile__("lda [%%g0] 2, %0\n\t" : "=r"(cctrl));
	return (cctrl >> 23) & 1;
	};

	static inline void sparc_leon3_disable_cache(void)
	{
	__asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
	"set 0x00000f, %%l2\n\t"
	"andn %%l2, %%l1, %%l2\n\t"
	"sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
	};

	static inline unsigned long sparc_leon3_asr17(void)
	{
	u32 asr17;
	__asm__ __volatile__ ("rd %%asr17, %0\n\t" : "=r"(asr17));
	return asr17;
	};

	static inline int sparc_leon3_cpuid(void)
	{
	return sparc_leon3_asr17() >> 28;
	}

	#endif /!__ASSEMBLY__/

	#ifdef CONFIG_SMP
	# define LEON3_IRQ_RESCHEDULE 13
	# define LEON3_IRQ_TICKER (leon_percpu_timer_dev[0].irq)
	# define LEON3_IRQ_CROSS_CALL 15
	#endif

	#if defined(PAGE_SIZE_LEON_8K)
	#define LEON_PAGE_SIZE_LEON 1
	#elif defined(PAGE_SIZE_LEON_16K)
	#define LEON_PAGE_SIZE_LEON 2)
	#else
	#define LEON_PAGE_SIZE_LEON 0
	#endif

	#if LEON_PAGE_SIZE_LEON == 0
	/* [ 8, 6, 6 ] + 12 */
	#define LEON_PGD_SH 24
	#define LEON_PGD_M 0xff
	#define LEON_PMD_SH 18
	#define LEON_PMD_SH_V (LEON_PGD_SH-2)
	#define LEON_PMD_M 0x3f
	#define LEON_PTE_SH 12
	#define LEON_PTE_M 0x3f
	#elif LEON_PAGE_SIZE_LEON == 1
	/* [ 7, 6, 6 ] + 13 */
	#define LEON_PGD_SH 25
	#define LEON_PGD_M 0x7f
	#define LEON_PMD_SH 19
	#define LEON_PMD_SH_V (LEON_PGD_SH-1)
	#define LEON_PMD_M 0x3f
	#define LEON_PTE_SH 13
	#define LEON_PTE_M 0x3f
	#elif LEON_PAGE_SIZE_LEON == 2
	/* [ 6, 6, 6 ] + 14 */
	#define LEON_PGD_SH 26
	#define LEON_PGD_M 0x3f
	#define LEON_PMD_SH 20
	#define LEON_PMD_SH_V (LEON_PGD_SH-0)
	#define LEON_PMD_M 0x3f
	#define LEON_PTE_SH 14
	#define LEON_PTE_M 0x3f
	#elif LEON_PAGE_SIZE_LEON == 3
	/* [ 4, 7, 6 ] + 15 */
	#define LEON_PGD_SH 28
	#define LEON_PGD_M 0x0f
	#define LEON_PMD_SH 21
	#define LEON_PMD_SH_V (LEON_PGD_SH-0)
	#define LEON_PMD_M 0x7f
	#define LEON_PTE_SH 15
	#define LEON_PTE_M 0x3f
	#else
	#error cannot determine LEON_PAGE_SIZE_LEON
	#endif

	#define PAGE_MIN_SHIFT (12)
	#define PAGE_MIN_SIZE (1UL << PAGE_MIN_SHIFT)

	#define LEON3_XCCR_SETS_MASK 0x07000000UL
	#define LEON3_XCCR_SSIZE_MASK 0x00f00000UL

	#define LEON2_CCR_DSETS_MASK 0x03000000UL
	#define LEON2_CFG_SSIZE_MASK 0x00007000UL

	#ifndef __ASSEMBLY__
	extern unsigned long srmmu_swprobe(unsigned long vaddr, unsigned long *paddr);
	extern void leon_flush_icache_all(void);
	extern void leon_flush_dcache_all(void);
	extern void leon_flush_cache_all(void);
	extern void leon_flush_tlb_all(void);
	extern int leon_flush_during_switch;
	extern int leon_flush_needed(void);

	struct vm_area_struct;
	extern void leon_flush_icache_all(void);
	extern void leon_flush_dcache_all(void);
	extern void leon_flush_pcache_all(struct vm_area_struct *vma, unsigned long page);
	extern void leon_flush_cache_all(void);
	extern void leon_flush_tlb_all(void);
	extern int leon_flush_during_switch;
	extern int leon_flush_needed(void);
	extern void leon_flush_pcache_all(struct vm_area_struct *vma, unsigned long page);

	/* struct that hold LEON3 cache configuration registers */
	struct leon3_cacheregs {
	unsigned long ccr; /* 0x00 - Cache Control Register */
	unsigned long iccr; /* 0x08 - Instruction Cache Configuration Register */
	unsigned long dccr; /* 0x0c - Data Cache Configuration Register */
	};

	/* struct that hold LEON2 cache configuration register
	* & configuration register
	*/
	struct leon2_cacheregs {
	unsigned long ccr, cfg;
	};

	#ifdef __KERNEL__

	#include <linux/interrupt.h>

	struct device_node;
	extern int sparc_leon_eirq_get(int eirq, int cpu);
	extern irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id);
	extern void sparc_leon_eirq_register(int eirq);
	extern void leon_clear_clock_irq(void);
	extern void leon_load_profile_irq(int cpu, unsigned int limit);
	extern void leon_init_timers(irq_handler_t counter_fn);
	extern void leon_clear_clock_irq(void);
	extern void leon_load_profile_irq(int cpu, unsigned int limit);
	extern void leon_trans_init(struct device_node *dp);
	extern void leon_node_init(struct device_node dp, struct device_node **nextp);
	extern void leon_init_IRQ(void);
	extern void leon_init(void);
	extern unsigned long srmmu_swprobe(unsigned long vaddr, unsigned long *paddr);
	extern void init_leon(void);
	extern void poke_leonsparc(void);
	extern void leon3_getCacheRegs(struct leon3_cacheregs *regs);
	extern int leon_flush_needed(void);
	extern void leon_switch_mm(void);
	extern int srmmu_swprobe_trace;

	#ifdef CONFIG_SMP
	extern int leon_smp_nrcpus(void);
	extern void leon_clear_profile_irq(int cpu);
	extern void leon_smp_done(void);
	extern void leon_boot_cpus(void);
	extern int leon_boot_one_cpu(int i);
	void leon_init_smp(void);
	extern void cpu_probe(void);
	extern void cpu_idle(void);
	extern void init_IRQ(void);
	extern void cpu_panic(void);
	extern int __leon_processor_id(void);
	void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);

	extern unsigned int real_irq_entry[], smpleon_ticker[];
	extern unsigned int patchme_maybe_smp_msg[];
	extern unsigned long trapbase_cpu1[];
	extern unsigned long trapbase_cpu2[];
	extern unsigned long trapbase_cpu3[];
	extern unsigned int t_nmi[], linux_trap_ipi15_leon[];
	extern unsigned int linux_trap_ipi15_sun4m[];

	#endif /* CONFIG_SMP */

	#endif /* __KERNEL__ */

	#endif /* __ASSEMBLY__ */

	/* macros used in leon_mm.c */
	#define PFN(x) ((x) >> PAGE_SHIFT)
	#define _pfn_valid(pfn) ((pfn < last_valid_pfn) && (pfn >= PFN(phys_base)))
	#define _SRMMU_PTE_PMASK_LEON 0xffffffff

	#else /* defined(CONFIG_SPARC_LEON) */

	/* nop definitions for !LEON case */
	#define leon_init() do {} while (0)
	#define leon_switch_mm() do {} while (0)
	#define leon_init_IRQ() do {} while (0)
	#define init_leon() do {} while (0)
	#define leon_smp_done() do {} while (0)
	#define leon_boot_cpus() do {} while (0)
	#define leon_boot_one_cpu(i) 1
	#define leon_init_smp() do {} while (0)

	#endif /* !defined(CONFIG_SPARC_LEON) */

	#endif