sparc,leon: CONFIG_SPARC_LEON option and leon specific files.

The macro CONFIG_SPARC_LEON will shield, if undefined, the sun-sparc
code from LEON specific code. In
particular include/asm/leon.h will get empty through #ifdef and
leon_kernel.c and leon_mm.c will not be compiled.

Signed-off-by: Konrad Eisele <konrad@gaisler.com>
Reviewed-by:   Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 362 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h
new file mode 100644
index 000000000000..28a42b73f64f
--- /dev/null
+++ b/arch/sparc/include/asm/leon.h
@@ -0,0 +1,362 @@
+/*
+ * 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;
+}
+
+extern 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");
+}
+
+extern 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;
+
+extern 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 */
+extern 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");
+};
+
+extern 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");
+};
+
+#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;
+
+#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)
+
+#endif /* !defined(CONFIG_SPARC_LEON) */
+
+#endif