1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
4 */
5
6 #include <common.h>
7 #include <cpu_func.h>
8 #include <dwmmc.h>
9 #include <init.h>
10 #include <malloc.h>
11 #include <asm/arcregs.h>
12 #include <asm/global_data.h>
13 #include "axs10x.h"
14 #include <asm/cache.h>
15
16 DECLARE_GLOBAL_DATA_PTR;
17
18 #define AXS_MB_CREG 0xE0011000
19
board_early_init_f(void)20 int board_early_init_f(void)
21 {
22 if (readl((void __iomem *)AXS_MB_CREG + 0x234) & (1 << 28))
23 gd->board_type = AXS_MB_V3;
24 else
25 gd->board_type = AXS_MB_V2;
26
27 return 0;
28 }
29
30 #ifdef CONFIG_ISA_ARCV2
31
board_jump_and_run(ulong entry,int zero,int arch,uint params)32 void board_jump_and_run(ulong entry, int zero, int arch, uint params)
33 {
34 void (*kernel_entry)(int zero, int arch, uint params);
35
36 kernel_entry = (void (*)(int, int, uint))entry;
37
38 smp_set_core_boot_addr(entry, -1);
39 smp_kick_all_cpus();
40 kernel_entry(zero, arch, params);
41 }
42
43 #define RESET_VECTOR_ADDR 0x0
44
smp_set_core_boot_addr(unsigned long addr,int corenr)45 void smp_set_core_boot_addr(unsigned long addr, int corenr)
46 {
47 /* All cores have reset vector pointing to 0 */
48 writel(addr, (void __iomem *)RESET_VECTOR_ADDR);
49
50 /* Make sure other cores see written value in memory */
51 flush_dcache_all();
52 }
53
smp_kick_all_cpus(void)54 void smp_kick_all_cpus(void)
55 {
56 /* CPU start CREG */
57 #define AXC003_CREG_CPU_START 0xF0001400
58 /* Bits positions in CPU start CREG */
59 #define BITS_START 0
60 #define BITS_START_MODE 4
61 #define BITS_CORE_SEL 9
62
63 /*
64 * In axs103 v1.1 START bits semantics has changed quite a bit.
65 * We used to have a generic START bit for all cores selected by CORE_SEL mask.
66 * But now we don't touch CORE_SEL at all because we have a dedicated START bit
67 * for each core:
68 * bit 0: Core 0 (master)
69 * bit 1: Core 1 (slave)
70 */
71 #define BITS_START_CORE1 1
72
73 #define ARCVER_HS38_3_0 0x53
74
75 int core_family = read_aux_reg(ARC_AUX_IDENTITY) & 0xff;
76 int cmd = readl((void __iomem *)AXC003_CREG_CPU_START);
77
78 if (core_family < ARCVER_HS38_3_0) {
79 cmd |= (1 << BITS_CORE_SEL) | (1 << BITS_START);
80 cmd &= ~(1 << BITS_START_MODE);
81 } else {
82 cmd |= (1 << BITS_START_CORE1);
83 }
84 writel(cmd, (void __iomem *)AXC003_CREG_CPU_START);
85 }
86 #endif
87
checkboard(void)88 int checkboard(void)
89 {
90 printf("Board: ARC Software Development Platform AXS%s\n",
91 is_isa_arcv2() ? "103" : "101");
92
93 return 0;
94 };
95