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 51 extern struct plat_smp_ops bmips43xx_smp_ops; 52 extern struct plat_smp_ops bmips5000_smp_ops; 53 54 static 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 78 extern char bmips_reset_nmi_vec; 79 extern char bmips_reset_nmi_vec_end; 80 extern char bmips_smp_movevec; 81 extern char bmips_smp_int_vec; 82 extern char bmips_smp_int_vec_end; 83 84 extern int bmips_smp_enabled; 85 extern int bmips_cpu_offset; 86 extern cpumask_t bmips_booted_mask; 87 extern unsigned long bmips_tp1_irqs; 88 89 extern void bmips_ebase_setup(void); 90 extern asmlinkage void plat_wired_tlb_setup(void); 91 extern void bmips_cpu_setup(void); 92 93 static inline unsigned long bmips_read_zscm_reg(unsigned int offset) 94 { 95 unsigned long ret; 96 97 barrier(); 98 cache_op(Index_Load_Tag_S, ZSCM_REG_BASE + offset); 99 __sync(); 100 _ssnop(); 101 _ssnop(); 102 _ssnop(); 103 _ssnop(); 104 _ssnop(); 105 _ssnop(); 106 _ssnop(); 107 ret = read_c0_ddatalo(); 108 _ssnop(); 109 110 return ret; 111 } 112 113 static inline void bmips_write_zscm_reg(unsigned int offset, unsigned long data) 114 { 115 write_c0_ddatalo(data); 116 _ssnop(); 117 _ssnop(); 118 _ssnop(); 119 cache_op(Index_Store_Tag_S, ZSCM_REG_BASE + offset); 120 _ssnop(); 121 _ssnop(); 122 _ssnop(); 123 barrier(); 124 } 125 126 static inline void bmips_post_dma_flush(struct device *dev) 127 { 128 void __iomem *cbr = BMIPS_GET_CBR(); 129 u32 cfg; 130 131 if (boot_cpu_type() != CPU_BMIPS3300 && 132 boot_cpu_type() != CPU_BMIPS4350 && 133 boot_cpu_type() != CPU_BMIPS4380) 134 return; 135 136 /* Flush stale data out of the readahead cache */ 137 cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG); 138 __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG); 139 __raw_readl(cbr + BMIPS_RAC_CONFIG); 140 } 141 142 #endif /* !defined(__ASSEMBLY__) */ 143 144 #endif /* _ASM_BMIPS_H */ 145