1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * arch/arm/cpu/armv7/rmobile/cpu_info-rcar.c
4  *
5  * Copyright (C) 2013,2014 Renesas Electronics Corporation
6  */
7 #include <common.h>
8 #include <asm/io.h>
9 
10 #define PRR_MASK		0x7fff
11 #define R8A7796_REV_1_0		0x5200
12 #define R8A7796_REV_1_1		0x5210
13 #define R8A7796_REV_1_3		0x5211
14 #define R8A77995_REV_1_1	0x5810
15 
rmobile_get_prr(void)16 static u32 rmobile_get_prr(void)
17 {
18 	if (IS_ENABLED(CONFIG_RCAR_64))
19 		return readl(0xFFF00044);
20 
21 	return readl(0xFF000044);
22 }
23 
rmobile_get_cpu_type(void)24 u32 rmobile_get_cpu_type(void)
25 {
26 	return (rmobile_get_prr() & 0x00007F00) >> 8;
27 }
28 
rmobile_get_cpu_rev_integer(void)29 u32 rmobile_get_cpu_rev_integer(void)
30 {
31 	const u32 prr = rmobile_get_prr();
32 	const u32 rev = prr & PRR_MASK;
33 
34 	if (rev == R8A7796_REV_1_1 || rev == R8A7796_REV_1_3 ||
35 	    rev == R8A77995_REV_1_1)
36 		return 1;
37 	else
38 		return ((prr & 0x000000F0) >> 4) + 1;
39 }
40 
rmobile_get_cpu_rev_fraction(void)41 u32 rmobile_get_cpu_rev_fraction(void)
42 {
43 	const u32 prr = rmobile_get_prr();
44 	const u32 rev = prr & PRR_MASK;
45 
46 	if (rev == R8A7796_REV_1_1 || rev == R8A77995_REV_1_1)
47 		return 1;
48 	else if (rev == R8A7796_REV_1_3)
49 		return 3;
50 	else
51 		return prr & 0x0000000F;
52 }
53