Merge tag 'efi-2020-07-rc6' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi
[oweals/u-boot.git] / arch / arm / mach-at91 / armv7 / cpu.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2010
4  * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
5  * (C) Copyright 2009
6  * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
7  * (C) Copyright 2013
8  * Bo Shen <voice.shen@atmel.com>
9  */
10
11 #include <common.h>
12 #include <cpu_func.h>
13 #include <init.h>
14 #include <vsprintf.h>
15 #include <asm/io.h>
16 #include <asm/arch/hardware.h>
17 #include <asm/arch/at91_pit.h>
18 #include <asm/arch/at91_gpbr.h>
19 #include <asm/arch/clk.h>
20
21 #ifndef CONFIG_SYS_AT91_MAIN_CLOCK
22 #define CONFIG_SYS_AT91_MAIN_CLOCK 0
23 #endif
24
25 int arch_cpu_init(void)
26 {
27         return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
28 }
29
30 void arch_preboot_os(void)
31 {
32         ulong cpiv;
33         at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT;
34
35         cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
36
37         /*
38          * Disable PITC
39          * Add 0x1000 to current counter to stop it faster
40          * without waiting for wrapping back to 0
41          */
42         writel(cpiv + 0x1000, &pit->mr);
43 }
44
45 #if defined(CONFIG_DISPLAY_CPUINFO)
46 int print_cpuinfo(void)
47 {
48         char buf[32];
49
50         printf("CPU: %s\n", get_cpu_name());
51         printf("Crystal frequency: %8s MHz\n",
52                strmhz(buf, get_main_clk_rate()));
53         printf("CPU clock        : %8s MHz\n",
54                strmhz(buf, get_cpu_clk_rate()));
55         printf("Master clock     : %8s MHz\n",
56                strmhz(buf, get_mck_clk_rate()));
57
58         return 0;
59 }
60 #endif
61
62 void enable_caches(void)
63 {
64         icache_enable();
65         dcache_enable();
66 }
67
68 #define ATMEL_CHIPID_CIDR_VERSION       0x1f
69
70 unsigned int get_chip_id(void)
71 {
72         return readl(ATMEL_CHIPID_CIDR) & ~ATMEL_CHIPID_CIDR_VERSION;
73 }
74
75 unsigned int get_extension_chip_id(void)
76 {
77         return readl(ATMEL_CHIPID_EXID);
78 }