• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
register_bmips_smp_ops(void)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 
bmips_read_zscm_reg(unsigned int offset)92 static 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 
bmips_write_zscm_reg(unsigned int offset,unsigned long data)112 static 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 
bmips_post_dma_flush(struct device * dev)125 static 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