tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Based on Ocelot Linux port, which is
3 * Copyright 2001 MontaVista Software Inc.
4 * Author: jsun@mvista.com or jsun@junsun.net
5 *
6 * Copyright 2003 ICT CAS
7 * Author: Michael Guo <guoyi@ict.ac.cn>
8 *
9 * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
10 * Author: Fuxin Zhang, zhangfx@lemote.com
11 *
12 * Copyright (C) 2009 Lemote Inc.
13 * Author: Wu Zhangjin, wuzhangjin@gmail.com
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
19 */
20#include <linux/module.h>
21#include <asm/bootinfo.h>
22#include <loongson.h>
23#include <boot_param.h>
24
25u32 cpu_clock_freq;
26EXPORT_SYMBOL(cpu_clock_freq);
27struct efi_memory_map_loongson *loongson_memmap;
28struct loongson_system_configuration loongson_sysconf;
29
30u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180};
31u64 loongson_freqctrl[MAX_PACKAGES];
32
33unsigned long long smp_group[4];
34int cpuhotplug_workaround = 0;
35
36#define parse_even_earlier(res, option, p) \
37do { \
38 unsigned int tmp __maybe_unused; \
39 \
40 if (strncmp(option, (char *)p, strlen(option)) == 0) \
41 tmp = kstrtou32((char *)p + strlen(option"="), 10, &res); \
42} while (0)
43
44void __init prom_init_env(void)
45{
46 /* pmon passes arguments in 32bit pointers */
47 unsigned int processor_id;
48
49#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE
50 int *_prom_envp;
51 long l;
52
53 /* firmware arguments are initialized in head.S */
54 _prom_envp = (int *)fw_arg2;
55
56 l = (long)*_prom_envp;
57 while (l != 0) {
58 parse_even_earlier(cpu_clock_freq, "cpuclock", l);
59 parse_even_earlier(memsize, "memsize", l);
60 parse_even_earlier(highmemsize, "highmemsize", l);
61 _prom_envp++;
62 l = (long)*_prom_envp;
63 }
64 if (memsize == 0)
65 memsize = 256;
66 pr_info("memsize=%u, highmemsize=%u\n", memsize, highmemsize);
67#else
68 struct boot_params *boot_p;
69 struct loongson_params *loongson_p;
70 struct efi_cpuinfo_loongson *ecpu;
71 struct irq_source_routing_table *eirq_source;
72
73 /* firmware arguments are initialized in head.S */
74 boot_p = (struct boot_params *)fw_arg2;
75 loongson_p = &(boot_p->efi.smbios.lp);
76
77 ecpu = (struct efi_cpuinfo_loongson *)
78 ((u64)loongson_p + loongson_p->cpu_offset);
79 eirq_source = (struct irq_source_routing_table *)
80 ((u64)loongson_p + loongson_p->irq_offset);
81 loongson_memmap = (struct efi_memory_map_loongson *)
82 ((u64)loongson_p + loongson_p->memory_offset);
83
84 cpu_clock_freq = ecpu->cpu_clock_freq;
85 loongson_sysconf.cputype = ecpu->cputype;
86 if (ecpu->cputype == Loongson_3A) {
87 loongson_sysconf.cores_per_node = 4;
88 loongson_sysconf.cores_per_package = 4;
89 smp_group[0] = 0x900000003ff01000;
90 smp_group[1] = 0x900010003ff01000;
91 smp_group[2] = 0x900020003ff01000;
92 smp_group[3] = 0x900030003ff01000;
93 loongson_chipcfg[0] = 0x900000001fe00180;
94 loongson_chipcfg[1] = 0x900010001fe00180;
95 loongson_chipcfg[2] = 0x900020001fe00180;
96 loongson_chipcfg[3] = 0x900030001fe00180;
97 loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
98 } else if (ecpu->cputype == Loongson_3B) {
99 loongson_sysconf.cores_per_node = 4; /* One chip has 2 nodes */
100 loongson_sysconf.cores_per_package = 8;
101 smp_group[0] = 0x900000003ff01000;
102 smp_group[1] = 0x900010003ff05000;
103 smp_group[2] = 0x900020003ff09000;
104 smp_group[3] = 0x900030003ff0d000;
105 loongson_chipcfg[0] = 0x900000001fe00180;
106 loongson_chipcfg[1] = 0x900020001fe00180;
107 loongson_chipcfg[2] = 0x900040001fe00180;
108 loongson_chipcfg[3] = 0x900060001fe00180;
109 loongson_freqctrl[0] = 0x900000001fe001d0;
110 loongson_freqctrl[1] = 0x900020001fe001d0;
111 loongson_freqctrl[2] = 0x900040001fe001d0;
112 loongson_freqctrl[3] = 0x900060001fe001d0;
113 loongson_sysconf.ht_control_base = 0x90001EFDFB000000;
114 cpuhotplug_workaround = 1;
115 } else {
116 loongson_sysconf.cores_per_node = 1;
117 loongson_sysconf.cores_per_package = 1;
118 loongson_chipcfg[0] = 0x900000001fe00180;
119 }
120
121 loongson_sysconf.nr_cpus = ecpu->nr_cpus;
122 if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0)
123 loongson_sysconf.nr_cpus = NR_CPUS;
124 loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +
125 loongson_sysconf.cores_per_node - 1) /
126 loongson_sysconf.cores_per_node;
127
128 loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
129 loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;
130 loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr;
131 loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits;
132 if (loongson_sysconf.dma_mask_bits < 32 ||
133 loongson_sysconf.dma_mask_bits > 64)
134 loongson_sysconf.dma_mask_bits = 32;
135
136 loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm;
137 loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;
138 loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend;
139
140 loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios;
141 pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n",
142 loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr,
143 loongson_sysconf.vgabios_addr);
144#endif
145 if (cpu_clock_freq == 0) {
146 processor_id = (¤t_cpu_data)->processor_id;
147 switch (processor_id & PRID_REV_MASK) {
148 case PRID_REV_LOONGSON2E:
149 cpu_clock_freq = 533080000;
150 break;
151 case PRID_REV_LOONGSON2F:
152 cpu_clock_freq = 797000000;
153 break;
154 case PRID_REV_LOONGSON3A:
155 cpu_clock_freq = 900000000;
156 break;
157 case PRID_REV_LOONGSON3B_R1:
158 case PRID_REV_LOONGSON3B_R2:
159 cpu_clock_freq = 1000000000;
160 break;
161 default:
162 cpu_clock_freq = 100000000;
163 break;
164 }
165 }
166 pr_info("CpuClock = %u\n", cpu_clock_freq);
167}