summaryrefslogtreecommitdiffstats
path: root/arch/mips/loongson64/common/env.c
blob: 22f04ca2ff3e58cd9ddddfa1ded6d84e5147efa0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/*
 * Based on Ocelot Linux port, which is
 * Copyright 2001 MontaVista Software Inc.
 * Author: jsun@mvista.com or jsun@junsun.net
 *
 * Copyright 2003 ICT CAS
 * Author: Michael Guo <guoyi@ict.ac.cn>
 *
 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
 * Author: Fuxin Zhang, zhangfx@lemote.com
 *
 * Copyright (C) 2009 Lemote Inc.
 * Author: Wu Zhangjin, wuzhangjin@gmail.com
 *
 * This program is free software; you can redistribute	it and/or modify it
 * under  the terms of	the GNU General	 Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */
#include <linux/module.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include <boot_param.h>
#include <workarounds.h>

u32 cpu_clock_freq;
EXPORT_SYMBOL(cpu_clock_freq);
struct efi_memory_map_loongson *loongson_memmap;
struct loongson_system_configuration loongson_sysconf;

u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180};
u64 loongson_chiptemp[MAX_PACKAGES];
u64 loongson_freqctrl[MAX_PACKAGES];

unsigned long long smp_group[4];

#define parse_even_earlier(res, option, p)				\
do {									\
	unsigned int tmp __maybe_unused;				\
									\
	if (strncmp(option, (char *)p, strlen(option)) == 0)		\
		tmp = kstrtou32((char *)p + strlen(option"="), 10, &res); \
} while (0)

void __init prom_init_env(void)
{
	/* pmon passes arguments in 32bit pointers */
	unsigned int processor_id;

#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
	int *_prom_envp;
	long l;

	/* firmware arguments are initialized in head.S */
	_prom_envp = (int *)fw_arg2;

	l = (long)*_prom_envp;
	while (l != 0) {
		parse_even_earlier(cpu_clock_freq, "cpuclock", l);
		parse_even_earlier(memsize, "memsize", l);
		parse_even_earlier(highmemsize, "highmemsize", l);
		_prom_envp++;
		l = (long)*_prom_envp;
	}
	if (memsize == 0)
		memsize = 256;
	pr_info("memsize=%u, highmemsize=%u\n", memsize, highmemsize);
#else
	struct boot_params *boot_p;
	struct loongson_params *loongson_p;
	struct system_loongson *esys;
	struct efi_cpuinfo_loongson *ecpu;
	struct irq_source_routing_table *eirq_source;

	/* firmware arguments are initialized in head.S */
	boot_p = (struct boot_params *)fw_arg2;
	loongson_p = &(boot_p->efi.smbios.lp);

	esys = (struct system_loongson *)
		((u64)loongson_p + loongson_p->system_offset);
	ecpu = (struct efi_cpuinfo_loongson *)
		((u64)loongson_p + loongson_p->cpu_offset);
	eirq_source = (struct irq_source_routing_table *)
		((u64)loongson_p + loongson_p->irq_offset);
	loongson_memmap = (struct efi_memory_map_loongson *)
		((u64)loongson_p + loongson_p->memory_offset);

	cpu_clock_freq = ecpu->cpu_clock_freq;
	loongson_sysconf.cputype = ecpu->cputype;
	if (ecpu->cputype == Loongson_3A) {
		loongson_sysconf.cores_per_node = 4;
		loongson_sysconf.cores_per_package = 4;
		smp_group[0] = 0x900000003ff01000;
		smp_group[1] = 0x900010003ff01000;
		smp_group[2] = 0x900020003ff01000;
		smp_group[3] = 0x900030003ff01000;
		loongson_chipcfg[0] = 0x900000001fe00180;
		loongson_chipcfg[1] = 0x900010001fe00180;
		loongson_chipcfg[2] = 0x900020001fe00180;
		loongson_chipcfg[3] = 0x900030001fe00180;
		loongson_chiptemp[0] = 0x900000001fe0019c;
		loongson_chiptemp[1] = 0x900010001fe0019c;
		loongson_chiptemp[2] = 0x900020001fe0019c;
		loongson_chiptemp[3] = 0x900030001fe0019c;
		loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
		loongson_sysconf.workarounds = WORKAROUND_CPUFREQ;
	} else if (ecpu->cputype == Loongson_3B) {
		loongson_sysconf.cores_per_node = 4; /* One chip has 2 nodes */
		loongson_sysconf.cores_per_package = 8;
		smp_group[0] = 0x900000003ff01000;
		smp_group[1] = 0x900010003ff05000;
		smp_group[2] = 0x900020003ff09000;
		smp_group[3] = 0x900030003ff0d000;
		loongson_chipcfg[0] = 0x900000001fe00180;
		loongson_chipcfg[1] = 0x900020001fe00180;
		loongson_chipcfg[2] = 0x900040001fe00180;
		loongson_chipcfg[3] = 0x900060001fe00180;
		loongson_chiptemp[0] = 0x900000001fe0019c;
		loongson_chiptemp[1] = 0x900020001fe0019c;
		loongson_chiptemp[2] = 0x900040001fe0019c;
		loongson_chiptemp[3] = 0x900060001fe0019c;
		loongson_freqctrl[0] = 0x900000001fe001d0;
		loongson_freqctrl[1] = 0x900020001fe001d0;
		loongson_freqctrl[2] = 0x900040001fe001d0;
		loongson_freqctrl[3] = 0x900060001fe001d0;
		loongson_sysconf.ht_control_base = 0x90001EFDFB000000;
		loongson_sysconf.workarounds = WORKAROUND_CPUHOTPLUG;
	} else {
		loongson_sysconf.cores_per_node = 1;
		loongson_sysconf.cores_per_package = 1;
		loongson_chipcfg[0] = 0x900000001fe00180;
	}

	loongson_sysconf.nr_cpus = ecpu->nr_cpus;
	loongson_sysconf.boot_cpu_id = ecpu->cpu_startup_core_id;
	loongson_sysconf.reserved_cpus_mask = ecpu->reserved_cores_mask;
	if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0)
		loongson_sysconf.nr_cpus = NR_CPUS;
	loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +
		loongson_sysconf.cores_per_node - 1) /
		loongson_sysconf.cores_per_node;

	loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
	loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;
	loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr;
	loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits;
	if (loongson_sysconf.dma_mask_bits < 32 ||
		loongson_sysconf.dma_mask_bits > 64)
		loongson_sysconf.dma_mask_bits = 32;

	loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm;
	loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;
	loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend;

	loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios;
	pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n",
		loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr,
		loongson_sysconf.vgabios_addr);

	memset(loongson_sysconf.ecname, 0, 32);
	if (esys->has_ec)
		memcpy(loongson_sysconf.ecname, esys->ec_name, 32);
	loongson_sysconf.workarounds |= esys->workarounds;

	loongson_sysconf.nr_uarts = esys->nr_uarts;
	if (esys->nr_uarts < 1 || esys->nr_uarts > MAX_UARTS)
		loongson_sysconf.nr_uarts = 1;
	memcpy(loongson_sysconf.uarts, esys->uarts,
		sizeof(struct uart_device) * loongson_sysconf.nr_uarts);

	loongson_sysconf.nr_sensors = esys->nr_sensors;
	if (loongson_sysconf.nr_sensors > MAX_SENSORS)
		loongson_sysconf.nr_sensors = 0;
	if (loongson_sysconf.nr_sensors)
		memcpy(loongson_sysconf.sensors, esys->sensors,
			sizeof(struct sensor_device) * loongson_sysconf.nr_sensors);
#endif
	if (cpu_clock_freq == 0) {
		processor_id = (&current_cpu_data)->processor_id;
		switch (processor_id & PRID_REV_MASK) {
		case PRID_REV_LOONGSON2E:
			cpu_clock_freq = 533080000;
			break;
		case PRID_REV_LOONGSON2F:
			cpu_clock_freq = 797000000;
			break;
		case PRID_REV_LOONGSON3A:
			cpu_clock_freq = 900000000;
			break;
		case PRID_REV_LOONGSON3B_R1:
		case PRID_REV_LOONGSON3B_R2:
			cpu_clock_freq = 1000000000;
			break;
		default:
			cpu_clock_freq = 100000000;
			break;
		}
	}
	pr_info("CpuClock = %u\n", cpu_clock_freq);
}
OpenPOWER on IntegriCloud