1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2013-2014, 2018 Synopsys, Inc. All rights reserved.
8 #include <asm/arcregs.h>
11 DECLARE_GLOBAL_DATA_PTR;
13 int arch_cpu_init(void)
17 gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
18 gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
25 int arch_early_init_r(void)
27 gd->bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
28 gd->bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
32 /* This is a dummy function on arc */
38 #ifdef CONFIG_DISPLAY_CPUINFO
39 const char *arc_700_version(int arcver, char *name, int name_len)
48 arc_ver = "v4.6-v4.9";
57 arc_ver = "unknown version";
60 snprintf(name, name_len, "ARC 700 %s", arc_ver);
65 struct em_template_t {
72 static const struct em_template_t em_versions[] = {
73 {false, false, false, "EM4"},
74 {true, false, false, "EM6"},
75 {false, true, false, "EM5D"},
76 {true, true, false, "EM7D"},
77 {false, true, true, "EM9D"},
78 {true, true, true, "EM11D"},
81 const char *arc_em_version(int arcver, char *name, int name_len)
83 const char *arc_name = "EM";
85 bool cache = ARC_FEATURE_EXISTS(ARC_BCR_IC_BUILD);
86 bool dsp = ARC_FEATURE_EXISTS(ARC_AUX_DSP_BUILD);
87 bool xymem = ARC_FEATURE_EXISTS(ARC_AUX_XY_BUILD);
90 for (i = 0; i < sizeof(em_versions) / sizeof(struct em_template_t); i++) {
91 if (em_versions[i].cache == cache &&
92 em_versions[i].dsp == dsp &&
93 em_versions[i].xymem == xymem) {
94 arc_name = em_versions[i].name;
113 arc_ver = "unknown version";
116 snprintf(name, name_len, "ARC %s %s", arc_name, arc_ver);
121 struct hs_template_t {
124 const bool dual_issue;
129 static const struct hs_template_t hs_versions[] = {
130 {false, false, false, false, "HS34"},
131 {true, false, false, false, "HS36"},
132 {true, true, false, false, "HS38"},
133 {false, false, true, false, "HS44"},
134 {true, false, true, false, "HS46"},
135 {true, true, true, false, "HS48"},
136 {false, false, true, true, "HS45D"},
137 {true, false, true, true, "HS47D"},
140 const char *arc_hs_version(int arcver, char *name, int name_len)
142 const char *arc_name = "HS";
144 bool cache = ARC_FEATURE_EXISTS(ARC_BCR_IC_BUILD);
145 bool dsp = ARC_FEATURE_EXISTS(ARC_AUX_DSP_BUILD);
146 bool mmu = !!read_aux_reg(ARC_AUX_MMU_BCR);
147 bool dual_issue = arcver == 0x54 ? true : false;
150 for (i = 0; i < sizeof(hs_versions) / sizeof(struct hs_template_t); i++) {
151 if (hs_versions[i].cache == cache &&
152 hs_versions[i].mmu == mmu &&
153 hs_versions[i].dual_issue == dual_issue &&
154 hs_versions[i].dsp == dsp) {
155 arc_name = hs_versions[i].name;
177 arc_ver = "unknown version";
180 snprintf(name, name_len, "ARC %s %s", arc_name, arc_ver);
185 const char *decode_identity(void)
187 #define MAX_CPU_NAME_LEN 64
189 int arcver = read_aux_reg(ARC_AUX_IDENTITY) & 0xff;
190 char *name = malloc(MAX_CPU_NAME_LEN);
193 return arc_hs_version(arcver, name, MAX_CPU_NAME_LEN);
194 else if (arcver >= 0x40)
195 return arc_em_version(arcver, name, MAX_CPU_NAME_LEN);
196 else if (arcver >= 0x30)
197 return arc_700_version(arcver, name, MAX_CPU_NAME_LEN);
199 return "Unknown ARC core";
202 const char *decode_subsystem(void)
204 int subsys_type = read_aux_reg(ARC_AUX_SUBSYS_BUILD) & GENMASK(3, 0);
206 switch (subsys_type) {
208 case 2: return "ARC Sensor & Control IP Subsystem";
209 case 3: return "ARC Data Fusion IP Subsystem";
210 case 4: return "ARC Secure Subsystem";
211 default: return "Unknown subsystem";
215 __weak int print_cpuinfo(void)
217 const char *subsys_name = decode_subsystem();
220 printf("CPU: %s at %s MHz\n", decode_identity(),
221 strmhz(mhz, gd->cpu_clk));
224 printf("Subsys:%s\n", subsys_name);
228 #endif /* CONFIG_DISPLAY_CPUINFO */