1 /*
2 * Common APIs for EXYNOS based board
3 *
4 * Copyright (C) 2013 Samsung Electronics
5 * Rajeshwari Shinde <rajeshwari.s@samsung.com>
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 */
25
26 #include <asm/arch/system.h>
27
28 #define DMC_OFFSET 0x10000
29
30 /*
31 * Memory initialization
32 *
33 * @param reset Reset PHY during initialization.
34 */
35 void mem_ctrl_init(int reset);
36
37 /* System Clock initialization */
38 void system_clock_init(void);
39
40 /*
41 * Init subsystems according to the reset status
42 *
43 * @return 0 for a normal boot, non-zero for a resume
44 */
45 int do_lowlevel_init(void);
46
47 void sdelay(unsigned long);
48
49 enum l2_cache_params {
50 CACHE_DATA_RAM_LATENCY_2_CYCLES = (2 << 0),
51 CACHE_DATA_RAM_LATENCY_3_CYCLES = (3 << 0),
52 CACHE_DISABLE_CLEAN_EVICT = (1 << 3),
53 CACHE_DATA_RAM_SETUP = (1 << 5),
54 CACHE_TAG_RAM_LATENCY_2_CYCLES = (2 << 6),
55 CACHE_TAG_RAM_LATENCY_3_CYCLES = (3 << 6),
56 CACHE_ENABLE_HAZARD_DETECT = (1 << 7),
57 CACHE_TAG_RAM_SETUP = (1 << 9),
58 CACHE_ECC_AND_PARITY = (1 << 21),
59 CACHE_ENABLE_FORCE_L2_LOGIC = (1 << 27)
60 };
61
62
63 #if !defined(CONFIG_SYS_L2CACHE_OFF) && defined(CONFIG_EXYNOS5420)
64 /*
65 * Configure L2CTLR to get timings that keep us from hanging/crashing.
66 *
67 * Must be inline here since low_power_start() is called without a
68 * stack (!).
69 */
configure_l2_ctlr(void)70 static inline void configure_l2_ctlr(void)
71 {
72 uint32_t val;
73
74 mrc_l2_ctlr(val);
75
76 val |= CACHE_TAG_RAM_SETUP |
77 CACHE_DATA_RAM_SETUP |
78 CACHE_TAG_RAM_LATENCY_2_CYCLES |
79 CACHE_DATA_RAM_LATENCY_2_CYCLES;
80
81 if (proid_is_exynos542x()) {
82 val |= CACHE_ECC_AND_PARITY |
83 CACHE_TAG_RAM_LATENCY_3_CYCLES |
84 CACHE_DATA_RAM_LATENCY_3_CYCLES;
85 }
86
87 mcr_l2_ctlr(val);
88 }
89
90 /*
91 * Configure L2ACTLR.
92 *
93 * Must be inline here since low_power_start() is called without a
94 * stack (!).
95 */
configure_l2_actlr(void)96 static inline void configure_l2_actlr(void)
97 {
98 uint32_t val;
99
100 if (proid_is_exynos542x()) {
101 mrc_l2_aux_ctlr(val);
102 val |= CACHE_ENABLE_FORCE_L2_LOGIC |
103 CACHE_DISABLE_CLEAN_EVICT;
104 mcr_l2_aux_ctlr(val);
105 }
106 }
107 #endif
108