1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2008 - 2013 Tensilica Inc.
4 * (C) Copyright 2014 - 2016 Cadence Design Systems Inc.
5 */
6
7 /*
8 * CPU specific code
9 */
10
11 #include <common.h>
12 #include <command.h>
13 #include <init.h>
14 #include <vsprintf.h>
15 #include <linux/stringify.h>
16 #include <asm/global_data.h>
17 #include <asm/cache.h>
18 #include <asm/string.h>
19 #include <asm/misc.h>
20
21 DECLARE_GLOBAL_DATA_PTR;
22
23 gd_t *gd __attribute__((section(".data")));
24
25 #if defined(CONFIG_DISPLAY_CPUINFO)
26 /*
27 * Print information about the CPU.
28 */
29
print_cpuinfo(void)30 int print_cpuinfo(void)
31 {
32 char buf[120], mhz[8];
33 uint32_t id0, id1;
34
35 asm volatile ("rsr %0, 176\n"
36 "rsr %1, 208\n"
37 : "=r"(id0), "=r"(id1));
38
39 sprintf(buf, "CPU: Xtensa %s (id: %08x:%08x) at %s MHz\n",
40 XCHAL_CORE_ID, id0, id1, strmhz(mhz, gd->cpu_clk));
41 puts(buf);
42 return 0;
43 }
44 #endif
45
arch_cpu_init(void)46 int arch_cpu_init(void)
47 {
48 gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
49 return 0;
50 }
51
dram_init(void)52 int dram_init(void)
53 {
54 return 0;
55 }
56