LXR linux/arch/mips/include/asm/bmips.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 2011 by Kevin Cernekee (cernekee@gmail.com)
   7 *
   8 * Definitions for BMIPS processors
   9 */
  10#ifndef _ASM_BMIPS_H
  11#define _ASM_BMIPS_H
  12
  13#include <linux/compiler.h>
  14#include <linux/linkage.h>
  15#include <asm/addrspace.h>
  16#include <asm/mipsregs.h>
  17#include <asm/hazards.h>
  18
  19/* NOTE: the CBR register returns a PA, and it can be above 0xff00_0000 */
  20#define BMIPS_GET_CBR()                 ((void __iomem *)(CKSEG1 | \
  21                                         (unsigned long) \
  22                                         ((read_c0_brcm_cbr() >> 18) << 18)))
  23
  24#define BMIPS_RAC_CONFIG                0x00000000
  25#define BMIPS_RAC_ADDRESS_RANGE         0x00000004
  26#define BMIPS_RAC_CONFIG_1              0x00000008
  27#define BMIPS_L2_CONFIG                 0x0000000c
  28#define BMIPS_LMB_CONTROL               0x0000001c
  29#define BMIPS_SYSTEM_BASE               0x00000020
  30#define BMIPS_PERF_GLOBAL_CONTROL       0x00020000
  31#define BMIPS_PERF_CONTROL_0            0x00020004
  32#define BMIPS_PERF_CONTROL_1            0x00020008
  33#define BMIPS_PERF_COUNTER_0            0x00020010
  34#define BMIPS_PERF_COUNTER_1            0x00020014
  35#define BMIPS_PERF_COUNTER_2            0x00020018
  36#define BMIPS_PERF_COUNTER_3            0x0002001c
  37#define BMIPS_RELO_VECTOR_CONTROL_0     0x00030000
  38#define BMIPS_RELO_VECTOR_CONTROL_1     0x00038000
  39
  40#define BMIPS_NMI_RESET_VEC             0x80000000
  41#define BMIPS_WARM_RESTART_VEC          0x80000380
  42
  43#define ZSCM_REG_BASE                   0x97000000
  44
  45#if !defined(__ASSEMBLY__)
  46
  47#include <linux/cpumask.h>
  48#include <asm/r4kcache.h>
  49#include <asm/smp-ops.h>
  50
  51extern struct plat_smp_ops bmips43xx_smp_ops;
  52extern struct plat_smp_ops bmips5000_smp_ops;
  53
  54static inline int register_bmips_smp_ops(void)
  55{
  56#if IS_ENABLED(CONFIG_CPU_BMIPS) && IS_ENABLED(CONFIG_SMP)
  57        switch (current_cpu_type()) {
  58        case CPU_BMIPS32:
  59        case CPU_BMIPS3300:
  60                return register_up_smp_ops();
  61        case CPU_BMIPS4350:
  62        case CPU_BMIPS4380:
  63                register_smp_ops(&bmips43xx_smp_ops);
  64                break;
  65        case CPU_BMIPS5000:
  66                register_smp_ops(&bmips5000_smp_ops);
  67                break;
  68        default:
  69                return -ENODEV;
  70        }
  71
  72        return 0;
  73#else
  74        return -ENODEV;
  75#endif
  76}
  77
  78extern char bmips_reset_nmi_vec;
  79extern char bmips_reset_nmi_vec_end;
  80extern char bmips_smp_movevec;
  81extern char bmips_smp_int_vec;
  82extern char bmips_smp_int_vec_end;
  83
  84extern int bmips_smp_enabled;
  85extern int bmips_cpu_offset;
  86extern cpumask_t bmips_booted_mask;
  87extern unsigned long bmips_tp1_irqs;
  88
  89extern void bmips_ebase_setup(void);
  90extern asmlinkage void plat_wired_tlb_setup(void);
  91
  92static inline unsigned long bmips_read_zscm_reg(unsigned int offset)
  93{
  94        unsigned long ret;
  95
  96        barrier();
  97        cache_op(Index_Load_Tag_S, ZSCM_REG_BASE + offset);
  98        __sync();
  99        _ssnop();
 100        _ssnop();
 101        _ssnop();
 102        _ssnop();
 103        _ssnop();
 104        _ssnop();
 105        _ssnop();
 106        ret = read_c0_ddatalo();
 107        _ssnop();
 108
 109        return ret;
 110}
 111
 112static inline void bmips_write_zscm_reg(unsigned int offset, unsigned long data)
 113{
 114        write_c0_ddatalo(data);
 115        _ssnop();
 116        _ssnop();
 117        _ssnop();
 118        cache_op(Index_Store_Tag_S, ZSCM_REG_BASE + offset);
 119        _ssnop();
 120        _ssnop();
 121        _ssnop();
 122        barrier();
 123}
 124
 125static inline void bmips_post_dma_flush(struct device *dev)
 126{
 127        void __iomem *cbr = BMIPS_GET_CBR();
 128        u32 cfg;
 129
 130        if (boot_cpu_type() != CPU_BMIPS3300 &&
 131            boot_cpu_type() != CPU_BMIPS4350 &&
 132            boot_cpu_type() != CPU_BMIPS4380)
 133                return;
 134
 135        /* Flush stale data out of the readahead cache */
 136        cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG);
 137        __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG);
 138        __raw_readl(cbr + BMIPS_RAC_CONFIG);
 139}
 140
 141#endif /* !defined(__ASSEMBLY__) */
 142
 143#endif /* _ASM_BMIPS_H */
 144