xref: /openbmc/u-boot/arch/xtensa/cpu/cpu.c (revision 747778cf)
1 /*
2  * (C) Copyright 2008 - 2013 Tensilica Inc.
3  * (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 /*
9  * CPU specific code
10  */
11 
12 #include <common.h>
13 #include <command.h>
14 #include <linux/stringify.h>
15 #include <asm/global_data.h>
16 #include <asm/cache.h>
17 #include <asm/string.h>
18 #include <asm/misc.h>
19 
20 DECLARE_GLOBAL_DATA_PTR;
21 
22 gd_t *gd __attribute__((section(".data")));
23 
24 #if defined(CONFIG_DISPLAY_CPUINFO)
25 /*
26  * Print information about the CPU.
27  */
28 
29 int print_cpuinfo(void)
30 {
31 	char buf[120], mhz[8];
32 	uint32_t id0, id1;
33 
34 	asm volatile ("rsr %0, 176\n"
35 		      "rsr %1, 208\n"
36 		      : "=r"(id0), "=r"(id1));
37 
38 	sprintf(buf, "CPU:   Xtensa %s (id: %08x:%08x) at %s MHz\n",
39 		XCHAL_CORE_ID, id0, id1, strmhz(mhz, gd->cpu_clk));
40 	puts(buf);
41 	return 0;
42 }
43 #endif
44 
45 int arch_cpu_init(void)
46 {
47 	gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
48 	return 0;
49 }
50 
51 int dram_init(void)
52 {
53 	return 0;
54 }
55