1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
4 */
5
6 #include <cpu_func.h>
7 #include <dwmmc.h>
8 #include <init.h>
9 #include <malloc.h>
10 #include <asm/arcregs.h>
11 #include <asm/global_data.h>
12 #include "axs10x.h"
13 #include <asm/cache.h>
14
15 DECLARE_GLOBAL_DATA_PTR;
16
17 #define AXS_MB_CREG 0xE0011000
18
board_early_init_f(void)19 int board_early_init_f(void)
20 {
21 if (readl((void __iomem *)AXS_MB_CREG + 0x234) & (1 << 28))
22 gd->board_type = AXS_MB_V3;
23 else
24 gd->board_type = AXS_MB_V2;
25
26 return 0;
27 }
28
29 #ifdef CONFIG_ISA_ARCV2
30
board_jump_and_run(ulong entry,int zero,int arch,uint params)31 void board_jump_and_run(ulong entry, int zero, int arch, uint params)
32 {
33 void (*kernel_entry)(int zero, int arch, uint params);
34
35 kernel_entry = (void (*)(int, int, uint))entry;
36
37 smp_set_core_boot_addr(entry, -1);
38 smp_kick_all_cpus();
39 kernel_entry(zero, arch, params);
40 }
41
42 #define RESET_VECTOR_ADDR 0x0
43
smp_set_core_boot_addr(unsigned long addr,int corenr)44 void smp_set_core_boot_addr(unsigned long addr, int corenr)
45 {
46 /* All cores have reset vector pointing to 0 */
47 writel(addr, (void __iomem *)RESET_VECTOR_ADDR);
48
49 /* Make sure other cores see written value in memory */
50 flush_dcache_all();
51 }
52
smp_kick_all_cpus(void)53 void smp_kick_all_cpus(void)
54 {
55 /* CPU start CREG */
56 #define AXC003_CREG_CPU_START 0xF0001400
57 /* Bits positions in CPU start CREG */
58 #define BITS_START 0
59 #define BITS_START_MODE 4
60 #define BITS_CORE_SEL 9
61
62 /*
63 * In axs103 v1.1 START bits semantics has changed quite a bit.
64 * We used to have a generic START bit for all cores selected by CORE_SEL mask.
65 * But now we don't touch CORE_SEL at all because we have a dedicated START bit
66 * for each core:
67 * bit 0: Core 0 (master)
68 * bit 1: Core 1 (slave)
69 */
70 #define BITS_START_CORE1 1
71
72 #define ARCVER_HS38_3_0 0x53
73
74 int core_family = read_aux_reg(ARC_AUX_IDENTITY) & 0xff;
75 int cmd = readl((void __iomem *)AXC003_CREG_CPU_START);
76
77 if (core_family < ARCVER_HS38_3_0) {
78 cmd |= (1 << BITS_CORE_SEL) | (1 << BITS_START);
79 cmd &= ~(1 << BITS_START_MODE);
80 } else {
81 cmd |= (1 << BITS_START_CORE1);
82 }
83 writel(cmd, (void __iomem *)AXC003_CREG_CPU_START);
84 }
85 #endif
86
checkboard(void)87 int checkboard(void)
88 {
89 printf("Board: ARC Software Development Platform AXS%s\n",
90 is_isa_arcv2() ? "103" : "101");
91
92 return 0;
93 };
94