1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
7 #include <debug_uart.h>
9 #include <asm/arch/stm32.h>
10 #include <asm/arch/sys_proto.h>
11 #include <dm/uclass.h>
14 #define RCC_TZCR (STM32_RCC_BASE + 0x00)
15 #define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C)
16 #define RCC_BDCR (STM32_RCC_BASE + 0x0140)
17 #define RCC_MP_APB5ENSETR (STM32_RCC_BASE + 0x0208)
18 #define RCC_BDCR_VSWRST BIT(31)
19 #define RCC_BDCR_RTCSRC GENMASK(17, 16)
20 #define RCC_DBGCFGR_DBGCKEN BIT(8)
22 /* Security register */
23 #define ETZPC_TZMA1_SIZE (STM32_ETZPC_BASE + 0x04)
24 #define ETZPC_DECPROT0 (STM32_ETZPC_BASE + 0x10)
26 #define TZC_GATE_KEEPER (STM32_TZC_BASE + 0x008)
27 #define TZC_REGION_ATTRIBUTE0 (STM32_TZC_BASE + 0x110)
28 #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114)
30 #define TAMP_CR1 (STM32_TAMP_BASE + 0x00)
32 #define PWR_CR1 (STM32_PWR_BASE + 0x00)
33 #define PWR_CR1_DBP BIT(8)
36 #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00)
37 #define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C)
38 #define DBGMCU_APB4FZ1_IWDG2 BIT(2)
39 #define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0)
40 #define DBGMCU_IDC_DEV_ID_SHIFT 0
41 #define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16)
42 #define DBGMCU_IDC_REV_ID_SHIFT 16
44 /* boot interface from Bootrom
45 * - boot instance = bit 31:16
46 * - boot device = bit 15:0
48 #define BOOTROM_PARAM_ADDR 0x2FFC0078
49 #define BOOTROM_MODE_MASK GENMASK(15, 0)
50 #define BOOTROM_MODE_SHIFT 0
51 #define BOOTROM_INSTANCE_MASK GENMASK(31, 16)
52 #define BOOTROM_INSTANCE_SHIFT 16
54 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
55 static void security_init(void)
57 /* Disable the backup domain write protection */
58 /* the protection is enable at each reset by hardware */
59 /* And must be disable by software */
60 setbits_le32(PWR_CR1, PWR_CR1_DBP);
62 while (!(readl(PWR_CR1) & PWR_CR1_DBP))
65 /* If RTC clock isn't enable so this is a cold boot then we need
66 * to reset the backup domain
68 if (!(readl(RCC_BDCR) & RCC_BDCR_RTCSRC)) {
69 setbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
70 while (!(readl(RCC_BDCR) & RCC_BDCR_VSWRST))
72 clrbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
75 /* allow non secure access in Write/Read for all peripheral */
76 writel(GENMASK(25, 0), ETZPC_DECPROT0);
78 /* Open SYSRAM for no secure access */
79 writel(0x0, ETZPC_TZMA1_SIZE);
81 /* enable TZC1 TZC2 clock */
82 writel(BIT(11) | BIT(12), RCC_MP_APB5ENSETR);
84 /* Region 0 set to no access by default */
85 /* bit 0 / 16 => nsaid0 read/write Enable
86 * bit 1 / 17 => nsaid1 read/write Enable
88 * bit 15 / 31 => nsaid15 read/write Enable
90 writel(0xFFFFFFFF, TZC_REGION_ID_ACCESS0);
91 /* bit 30 / 31 => Secure Global Enable : write/read */
92 /* bit 0 / 1 => Region Enable for filter 0/1 */
93 writel(BIT(0) | BIT(1) | BIT(30) | BIT(31), TZC_REGION_ATTRIBUTE0);
95 /* Enable Filter 0 and 1 */
96 setbits_le32(TZC_GATE_KEEPER, BIT(0) | BIT(1));
98 /* RCC trust zone deactivated */
99 writel(0x0, RCC_TZCR);
101 /* TAMP: deactivate the internal tamper
102 * Bit 23 ITAMP8E: monotonic counter overflow
103 * Bit 20 ITAMP5E: RTC calendar overflow
104 * Bit 19 ITAMP4E: HSE monitoring
105 * Bit 18 ITAMP3E: LSE monitoring
106 * Bit 16 ITAMP1E: RTC power domain supply monitoring
108 writel(0x0, TAMP_CR1);
114 static void dbgmcu_init(void)
116 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
118 /* Freeze IWDG2 if Cortex-A7 is in debug mode */
119 setbits_le32(DBGMCU_APB4FZ1, DBGMCU_APB4FZ1_IWDG2);
121 #endif /* !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) */
123 static u32 get_bootmode(void)
126 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
127 u32 bootrom_itf = readl(BOOTROM_PARAM_ADDR);
128 u32 bootrom_device, bootrom_instance;
131 (bootrom_itf & BOOTROM_MODE_MASK) >> BOOTROM_MODE_SHIFT;
133 (bootrom_itf & BOOTROM_INSTANCE_MASK) >> BOOTROM_INSTANCE_SHIFT;
135 ((bootrom_device << BOOT_TYPE_SHIFT) & BOOT_TYPE_MASK) |
136 ((bootrom_instance << BOOT_INSTANCE_SHIFT) &
139 /* save the boot mode in TAMP backup register */
140 clrsetbits_le32(TAMP_BOOT_CONTEXT,
142 boot_mode << TAMP_BOOT_MODE_SHIFT);
144 /* read TAMP backup register */
145 boot_mode = (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >>
146 TAMP_BOOT_MODE_SHIFT;
154 int arch_cpu_init(void)
158 /* early armv7 timer init: needed for polling */
161 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
167 /* get bootmode from BootRom context: saved in TAMP register */
168 boot_mode = get_bootmode();
170 if ((boot_mode & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_UART)
171 gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE;
172 #if defined(CONFIG_DEBUG_UART) && \
173 (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
181 void enable_caches(void)
183 /* Enable D-cache. I-cache is already enabled in start.S */
187 static u32 read_idc(void)
189 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
191 return readl(DBGMCU_IDC);
194 u32 get_cpu_rev(void)
196 return (read_idc() & DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT;
199 u32 get_cpu_type(void)
201 return (read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT;
204 #if defined(CONFIG_DISPLAY_CPUINFO)
205 int print_cpuinfo(void)
209 switch (get_cpu_type()) {
210 case CPU_STMP32MP15x:
218 switch (get_cpu_rev()) {
230 printf("CPU: STM32MP%s.%s\n", cpu_s, cpu_r);
234 #endif /* CONFIG_DISPLAY_CPUINFO */
236 static void setup_boot_mode(void)
239 u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
241 (boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT;
242 int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
244 pr_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d\n",
245 __func__, boot_ctx, boot_mode, instance);
247 switch (boot_mode & TAMP_BOOT_DEVICE_MASK) {
248 case BOOT_SERIAL_UART:
249 sprintf(cmd, "%d", instance);
250 env_set("boot_device", "uart");
251 env_set("boot_instance", cmd);
253 case BOOT_SERIAL_USB:
254 env_set("boot_device", "usb");
255 env_set("boot_instance", "0");
258 case BOOT_FLASH_EMMC:
259 sprintf(cmd, "%d", instance);
260 env_set("boot_device", "mmc");
261 env_set("boot_instance", cmd);
263 case BOOT_FLASH_NAND:
264 env_set("boot_device", "nand");
265 env_set("boot_instance", "0");
268 env_set("boot_device", "nor");
269 env_set("boot_instance", "0");
272 pr_debug("unexpected boot mode = %x\n", boot_mode);
277 int arch_misc_init(void)