2 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
4 * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
9 #include <asm/arch/stm32.h>
10 #include <asm/arch/sys_proto.h>
13 #define RCC_TZCR (STM32_RCC_BASE + 0x00)
14 #define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C)
15 #define RCC_BDCR (STM32_RCC_BASE + 0x0140)
16 #define RCC_MP_APB5ENSETR (STM32_RCC_BASE + 0x0208)
17 #define RCC_BDCR_VSWRST BIT(31)
18 #define RCC_BDCR_RTCSRC GENMASK(17, 16)
19 #define RCC_DBGCFGR_DBGCKEN BIT(8)
21 /* Security register */
22 #define ETZPC_TZMA1_SIZE (STM32_ETZPC_BASE + 0x04)
23 #define ETZPC_DECPROT0 (STM32_ETZPC_BASE + 0x10)
25 #define TZC_GATE_KEEPER (STM32_TZC_BASE + 0x008)
26 #define TZC_REGION_ATTRIBUTE0 (STM32_TZC_BASE + 0x110)
27 #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114)
29 #define TAMP_CR1 (STM32_TAMP_BASE + 0x00)
31 #define PWR_CR1 (STM32_PWR_BASE + 0x00)
32 #define PWR_CR1_DBP BIT(8)
35 #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00)
36 #define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C)
37 #define DBGMCU_APB4FZ1_IWDG2 BIT(2)
38 #define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0)
39 #define DBGMCU_IDC_DEV_ID_SHIFT 0
40 #define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16)
41 #define DBGMCU_IDC_REV_ID_SHIFT 16
43 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
44 static void security_init(void)
46 /* Disable the backup domain write protection */
47 /* the protection is enable at each reset by hardware */
48 /* And must be disable by software */
49 setbits_le32(PWR_CR1, PWR_CR1_DBP);
51 while (!(readl(PWR_CR1) & PWR_CR1_DBP))
54 /* If RTC clock isn't enable so this is a cold boot then we need
55 * to reset the backup domain
57 if (!(readl(RCC_BDCR) & RCC_BDCR_RTCSRC)) {
58 setbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
59 while (!(readl(RCC_BDCR) & RCC_BDCR_VSWRST))
61 clrbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
64 /* allow non secure access in Write/Read for all peripheral */
65 writel(GENMASK(25, 0), ETZPC_DECPROT0);
67 /* Open SYSRAM for no secure access */
68 writel(0x0, ETZPC_TZMA1_SIZE);
70 /* enable TZC1 TZC2 clock */
71 writel(BIT(11) | BIT(12), RCC_MP_APB5ENSETR);
73 /* Region 0 set to no access by default */
74 /* bit 0 / 16 => nsaid0 read/write Enable
75 * bit 1 / 17 => nsaid1 read/write Enable
77 * bit 15 / 31 => nsaid15 read/write Enable
79 writel(0xFFFFFFFF, TZC_REGION_ID_ACCESS0);
80 /* bit 30 / 31 => Secure Global Enable : write/read */
81 /* bit 0 / 1 => Region Enable for filter 0/1 */
82 writel(BIT(0) | BIT(1) | BIT(30) | BIT(31), TZC_REGION_ATTRIBUTE0);
84 /* Enable Filter 0 and 1 */
85 setbits_le32(TZC_GATE_KEEPER, BIT(0) | BIT(1));
87 /* RCC trust zone deactivated */
88 writel(0x0, RCC_TZCR);
90 /* TAMP: deactivate the internal tamper
91 * Bit 23 ITAMP8E: monotonic counter overflow
92 * Bit 20 ITAMP5E: RTC calendar overflow
93 * Bit 19 ITAMP4E: HSE monitoring
94 * Bit 18 ITAMP3E: LSE monitoring
95 * Bit 16 ITAMP1E: RTC power domain supply monitoring
97 writel(0x0, TAMP_CR1);
103 static void dbgmcu_init(void)
105 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
107 /* Freeze IWDG2 if Cortex-A7 is in debug mode */
108 setbits_le32(DBGMCU_APB4FZ1, DBGMCU_APB4FZ1_IWDG2);
110 #endif /* !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) */
112 int arch_cpu_init(void)
114 /* early armv7 timer init: needed for polling */
117 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
126 void enable_caches(void)
128 /* Enable D-cache. I-cache is already enabled in start.S */
132 static u32 read_idc(void)
134 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
136 return readl(DBGMCU_IDC);
139 u32 get_cpu_rev(void)
141 return (read_idc() & DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT;
144 u32 get_cpu_type(void)
146 return (read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT;
149 #if defined(CONFIG_DISPLAY_CPUINFO)
150 int print_cpuinfo(void)
154 switch (get_cpu_type()) {
155 case CPU_STMP32MP15x:
163 switch (get_cpu_rev()) {
175 printf("CPU: STM32MP%s.%s\n", cpu_s, cpu_r);
179 #endif /* CONFIG_DISPLAY_CPUINFO */
181 void reset_cpu(ulong addr)