leon.h

Go to the documentation of this file.

/*
 * Copyright (C) 2004 Konrad Eisele ([email protected],[email protected]) Gaisler Research
 * Copyright (C) 2004 Stefan Holst ([email protected]) Uni-Stuttgart
 * Copyright (C) 2009 Daniel Hellstrom ([email protected]) Aeroflex Gaisler AB
 * Copyright (C) 2009 Konrad Eisele ([email protected]) Aeroflex Gaisler AB
 */

#ifndef LEON_H_INCLUDE
#define LEON_H_INCLUDE

/* 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

/* 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 */

#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 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 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;
}

/* 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 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))

extern void leon_switch_mm(void);
extern void leon_init_IRQ(void);

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 
#ifdef CONFIG_SMP
# define LEON3_IRQ_IPI_DEFAULT      13
# define LEON3_IRQ_TICKER       (leon3_ticker_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 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__
struct vm_area_struct;

extern unsigned long leon_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);
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 */
};

#include <linux/irq.h>
#include <linux/interrupt.h>

struct device_node;
struct task_struct;
extern unsigned int leon_build_device_irq(unsigned int real_irq,
                       irq_flow_handler_t flow_handler,
                       const char *name, int do_ack);
extern void leon_update_virq_handling(unsigned int virq,
                  irq_flow_handler_t flow_handler,
                  const char *name, int do_ack);
extern void leon_init_timers(void);
extern void leon_trans_init(struct device_node *dp);
extern void leon_node_init(struct device_node *dp, struct device_node ***nextp);
extern void init_leon(void);
extern void poke_leonsparc(void);
extern void leon3_getCacheRegs(struct leon3_cacheregs *regs);
extern int leon3_ticker_irq;

#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, struct task_struct *);
void leon_init_smp(void);
void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);
extern irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused);

extern unsigned int smpleon_ipi[];
extern unsigned int linux_trap_ipi15_leon[];
extern int leon_ipi_irq;

#endif /* CONFIG_SMP */

#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

#endif