arch/sparc/include/asm/leon.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2004 Konrad Eisele (eiselekd@web.de,konrad@gaisler.com) Gaisler Research
   4  * Copyright (C) 2004 Stefan Holst (mail@s-holst.de) Uni-Stuttgart
   5  * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
   6  * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
   7  */
   8
   9 #ifndef LEON_H_INCLUDE
  10 #define LEON_H_INCLUDE
  11
  12 /* mmu register access, ASI_LEON_MMUREGS */
  13 #define LEON_CNR_CTRL           0x000
  14 #define LEON_CNR_CTXP           0x100
  15 #define LEON_CNR_CTX            0x200
  16 #define LEON_CNR_F              0x300
  17 #define LEON_CNR_FADDR          0x400
  18
  19 #define LEON_CNR_CTX_NCTX       256     /*number of MMU ctx */
  20
  21 #define LEON_CNR_CTRL_TLBDIS    0x80000000
  22
  23 #define LEON_MMUTLB_ENT_MAX     64
  24
  25 /*
  26  * diagnostic access from mmutlb.vhd:
  27  * 0: pte address
  28  * 4: pte
  29  * 8: additional flags
  30  */
  31 #define LEON_DIAGF_LVL          0x3
  32 #define LEON_DIAGF_WR           0x8
  33 #define LEON_DIAGF_WR_SHIFT     3
  34 #define LEON_DIAGF_HIT          0x10
  35 #define LEON_DIAGF_HIT_SHIFT    4
  36 #define LEON_DIAGF_CTX          0x1fe0
  37 #define LEON_DIAGF_CTX_SHIFT    5
  38 #define LEON_DIAGF_VALID        0x2000
  39 #define LEON_DIAGF_VALID_SHIFT  13
  40
  41 /* irq masks */
  42 #define LEON_HARD_INT(x)        (1 << (x))      /* irq 0-15 */
  43 #define LEON_IRQMASK_R          0x0000fffe      /* bit 15- 1 of lregs.irqmask */
  44 #define LEON_IRQPRIO_R          0xfffe0000      /* bit 31-17 of lregs.irqmask */
  45
  46 #define LEON_MCFG2_SRAMDIS              0x00002000
  47 #define LEON_MCFG2_SDRAMEN              0x00004000
  48 #define LEON_MCFG2_SRAMBANKSZ           0x00001e00      /* [12-9] */
  49 #define LEON_MCFG2_SRAMBANKSZ_SHIFT     9
  50 #define LEON_MCFG2_SDRAMBANKSZ          0x03800000      /* [25-23] */
  51 #define LEON_MCFG2_SDRAMBANKSZ_SHIFT    23
  52
  53 #define LEON_TCNT0_MASK 0x7fffff
  54
  55
  56 #define ASI_LEON3_SYSCTRL               0x02
  57 #define ASI_LEON3_SYSCTRL_ICFG          0x08
  58 #define ASI_LEON3_SYSCTRL_DCFG          0x0c
  59 #define ASI_LEON3_SYSCTRL_CFG_SNOOPING (1 << 27)
  60 #define ASI_LEON3_SYSCTRL_CFG_SSIZE(c) (1 << ((c >> 20) & 0xf))
  61
  62 #ifndef __ASSEMBLY__
  63
  64 /* do a physical address bypass write, i.e. for 0x80000000 */
  65 static inline void leon_store_reg(unsigned long paddr, unsigned long value)
  66 {
  67         __asm__ __volatile__("sta %0, [%1] %2\n\t" : : "r"(value), "r"(paddr),
  68                              "i"(ASI_LEON_BYPASS) : "memory");
  69 }
  70
  71 /* do a physical address bypass load, i.e. for 0x80000000 */
  72 static inline unsigned long leon_load_reg(unsigned long paddr)
  73 {
  74         unsigned long retval;
  75         __asm__ __volatile__("lda [%1] %2, %0\n\t" :
  76                              "=r"(retval) : "r"(paddr), "i"(ASI_LEON_BYPASS));
  77         return retval;
  78 }
  79
  80 /* macro access for leon_load_reg() and leon_store_reg() */
  81 #define LEON3_BYPASS_LOAD_PA(x)     (leon_load_reg((unsigned long)(x)))
  82 #define LEON3_BYPASS_STORE_PA(x, v) (leon_store_reg((unsigned long)(x), (unsigned long)(v)))
  83 #define LEON_BYPASS_LOAD_PA(x)      leon_load_reg((unsigned long)(x))
  84 #define LEON_BYPASS_STORE_PA(x, v)  leon_store_reg((unsigned long)(x), (unsigned long)(v))
  85
  86 void leon_switch_mm(void);
  87 void leon_init_IRQ(void);
  88
  89 static inline unsigned long sparc_leon3_get_dcachecfg(void)
  90 {
  91         unsigned int retval;
  92         __asm__ __volatile__("lda [%1] %2, %0\n\t" :
  93                              "=r"(retval) :
  94                              "r"(ASI_LEON3_SYSCTRL_DCFG),
  95                              "i"(ASI_LEON3_SYSCTRL));
  96         return retval;
  97 }
  98
  99 /* enable snooping */
 100 static inline void sparc_leon3_enable_snooping(void)
 101 {
 102         __asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
 103                           "set 0x800000, %%l2\n\t"
 104                           "or  %%l2, %%l1, %%l2\n\t"
 105                           "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
 106 };
 107
 108 static inline int sparc_leon3_snooping_enabled(void)
 109 {
 110         u32 cctrl;
 111         __asm__ __volatile__("lda [%%g0] 2, %0\n\t" : "=r"(cctrl));
 112         return ((cctrl >> 23) & 1) && ((cctrl >> 17) & 1);
 113 };
 114
 115 static inline void sparc_leon3_disable_cache(void)
 116 {
 117         __asm__ __volatile__ ("lda [%%g0] 2, %%l1\n\t"
 118                           "set 0x00000f, %%l2\n\t"
 119                           "andn  %%l2, %%l1, %%l2\n\t"
 120                           "sta %%l2, [%%g0] 2\n\t" : : : "l1", "l2");
 121 };
 122
 123 static inline unsigned long sparc_leon3_asr17(void)
 124 {
 125         u32 asr17;
 126         __asm__ __volatile__ ("rd %%asr17, %0\n\t" : "=r"(asr17));
 127         return asr17;
 128 };
 129
 130 static inline int sparc_leon3_cpuid(void)
 131 {
 132         return sparc_leon3_asr17() >> 28;
 133 }
 134
 135 #endif /*!__ASSEMBLY__*/
 136
 137 #ifdef CONFIG_SMP
 138 # define LEON3_IRQ_IPI_DEFAULT          13
 139 # define LEON3_IRQ_TICKER               (leon3_gptimer_irq)
 140 # define LEON3_IRQ_CROSS_CALL           15
 141 #endif
 142
 143 #if defined(PAGE_SIZE_LEON_8K)
 144 #define LEON_PAGE_SIZE_LEON 1
 145 #elif defined(PAGE_SIZE_LEON_16K)
 146 #define LEON_PAGE_SIZE_LEON 2)
 147 #else
 148 #define LEON_PAGE_SIZE_LEON 0
 149 #endif
 150
 151 #if LEON_PAGE_SIZE_LEON == 0
 152 /* [ 8, 6, 6 ] + 12 */
 153 #define LEON_PGD_SH    24
 154 #define LEON_PGD_M     0xff
 155 #define LEON_PMD_SH    18
 156 #define LEON_PMD_SH_V  (LEON_PGD_SH-2)
 157 #define LEON_PMD_M     0x3f
 158 #define LEON_PTE_SH    12
 159 #define LEON_PTE_M     0x3f
 160 #elif LEON_PAGE_SIZE_LEON == 1
 161 /* [ 7, 6, 6 ] + 13 */
 162 #define LEON_PGD_SH    25
 163 #define LEON_PGD_M     0x7f
 164 #define LEON_PMD_SH    19
 165 #define LEON_PMD_SH_V  (LEON_PGD_SH-1)
 166 #define LEON_PMD_M     0x3f
 167 #define LEON_PTE_SH    13
 168 #define LEON_PTE_M     0x3f
 169 #elif LEON_PAGE_SIZE_LEON == 2
 170 /* [ 6, 6, 6 ] + 14 */
 171 #define LEON_PGD_SH    26
 172 #define LEON_PGD_M     0x3f
 173 #define LEON_PMD_SH    20
 174 #define LEON_PMD_SH_V  (LEON_PGD_SH-0)
 175 #define LEON_PMD_M     0x3f
 176 #define LEON_PTE_SH    14
 177 #define LEON_PTE_M     0x3f
 178 #elif LEON_PAGE_SIZE_LEON == 3
 179 /* [ 4, 7, 6 ] + 15 */
 180 #define LEON_PGD_SH    28
 181 #define LEON_PGD_M     0x0f
 182 #define LEON_PMD_SH    21
 183 #define LEON_PMD_SH_V  (LEON_PGD_SH-0)
 184 #define LEON_PMD_M     0x7f
 185 #define LEON_PTE_SH    15
 186 #define LEON_PTE_M     0x3f
 187 #else
 188 #error cannot determine LEON_PAGE_SIZE_LEON
 189 #endif
 190
 191 #define LEON3_XCCR_SETS_MASK  0x07000000UL
 192 #define LEON3_XCCR_SSIZE_MASK 0x00f00000UL
 193
 194 #define LEON2_CCR_DSETS_MASK 0x03000000UL
 195 #define LEON2_CFG_SSIZE_MASK 0x00007000UL
 196
 197 #ifndef __ASSEMBLY__
 198 struct vm_area_struct;
 199
 200 unsigned long leon_swprobe(unsigned long vaddr, unsigned long *paddr);
 201 void leon_flush_icache_all(void);
 202 void leon_flush_dcache_all(void);
 203 void leon_flush_cache_all(void);
 204 void leon_flush_tlb_all(void);
 205 extern int leon_flush_during_switch;
 206 int leon_flush_needed(void);
 207 void leon_flush_pcache_all(struct vm_area_struct *vma, unsigned long page);
 208
 209 /* struct that hold LEON3 cache configuration registers */
 210 struct leon3_cacheregs {
 211         unsigned long ccr;      /* 0x00 - Cache Control Register  */
 212         unsigned long iccr;     /* 0x08 - Instruction Cache Configuration Register */
 213         unsigned long dccr;     /* 0x0c - Data Cache Configuration Register */
 214 };
 215
 216 #include <linux/irq.h>
 217 #include <linux/interrupt.h>
 218
 219 struct device_node;
 220 struct task_struct;
 221 unsigned int leon_build_device_irq(unsigned int real_irq,
 222                                    irq_flow_handler_t flow_handler,
 223                                    const char *name, int do_ack);
 224 void leon_update_virq_handling(unsigned int virq,
 225                                irq_flow_handler_t flow_handler,
 226                                const char *name, int do_ack);
 227 void leon_init_timers(void);
 228 void leon_node_init(struct device_node *dp, struct device_node ***nextp);
 229 void init_leon(void);
 230 void poke_leonsparc(void);
 231 void leon3_getCacheRegs(struct leon3_cacheregs *regs);
 232 extern int leon3_ticker_irq;
 233
 234 #ifdef CONFIG_SMP
 235 int leon_smp_nrcpus(void);
 236 void leon_clear_profile_irq(int cpu);
 237 void leon_smp_done(void);
 238 void leon_boot_cpus(void);
 239 int leon_boot_one_cpu(int i, struct task_struct *);
 240 void leon_init_smp(void);
 241 void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);
 242 irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused);
 243
 244 extern unsigned int smpleon_ipi[];
 245 extern unsigned int linux_trap_ipi15_leon[];
 246 extern int leon_ipi_irq;
 247
 248 #endif /* CONFIG_SMP */
 249
 250 #endif /* __ASSEMBLY__ */
 251
 252 /* macros used in leon_mm.c */
 253 #define PFN(x)           ((x) >> PAGE_SHIFT)
 254 #define _pfn_valid(pfn)  ((pfn < last_valid_pfn) && (pfn >= PFN(phys_base)))
 255 #define _SRMMU_PTE_PMASK_LEON 0xffffffff
 256
 257 /*
 258  * On LEON PCI Memory space is mapped 1:1 with physical address space.
 259  *
 260  * I/O space is located at low 64Kbytes in PCI I/O space. The I/O addresses
 261  * are converted into CPU addresses to virtual addresses that are mapped with
 262  * MMU to the PCI Host PCI I/O space window which are translated to the low
 263  * 64Kbytes by the Host controller.
 264  */
 265
 266 #endif