1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
8 #include <debug_uart.h>
12 #include <asm/arch/stm32.h>
13 #include <asm/arch/sys_proto.h>
14 #include <dm/device.h>
15 #include <dm/uclass.h>
18 #define RCC_TZCR (STM32_RCC_BASE + 0x00)
19 #define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C)
20 #define RCC_BDCR (STM32_RCC_BASE + 0x0140)
21 #define RCC_MP_APB5ENSETR (STM32_RCC_BASE + 0x0208)
22 #define RCC_MP_AHB5ENSETR (STM32_RCC_BASE + 0x0210)
23 #define RCC_BDCR_VSWRST BIT(31)
24 #define RCC_BDCR_RTCSRC GENMASK(17, 16)
25 #define RCC_DBGCFGR_DBGCKEN BIT(8)
27 /* Security register */
28 #define ETZPC_TZMA1_SIZE (STM32_ETZPC_BASE + 0x04)
29 #define ETZPC_DECPROT0 (STM32_ETZPC_BASE + 0x10)
31 #define TZC_GATE_KEEPER (STM32_TZC_BASE + 0x008)
32 #define TZC_REGION_ATTRIBUTE0 (STM32_TZC_BASE + 0x110)
33 #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114)
35 #define TAMP_CR1 (STM32_TAMP_BASE + 0x00)
37 #define PWR_CR1 (STM32_PWR_BASE + 0x00)
38 #define PWR_MCUCR (STM32_PWR_BASE + 0x14)
39 #define PWR_CR1_DBP BIT(8)
40 #define PWR_MCUCR_SBF BIT(6)
43 #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00)
44 #define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C)
45 #define DBGMCU_APB4FZ1_IWDG2 BIT(2)
46 #define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0)
47 #define DBGMCU_IDC_DEV_ID_SHIFT 0
48 #define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16)
49 #define DBGMCU_IDC_REV_ID_SHIFT 16
52 #define GPIOZ_SECCFGR 0x54004030
54 /* boot interface from Bootrom
55 * - boot instance = bit 31:16
56 * - boot device = bit 15:0
58 #define BOOTROM_PARAM_ADDR 0x2FFC0078
59 #define BOOTROM_MODE_MASK GENMASK(15, 0)
60 #define BOOTROM_MODE_SHIFT 0
61 #define BOOTROM_INSTANCE_MASK GENMASK(31, 16)
62 #define BOOTROM_INSTANCE_SHIFT 16
64 /* Device Part Number (RPN) = OTP_DATA1 lower 8 bits */
66 #define RPN_MASK GENMASK(7, 0)
68 /* Package = bit 27:29 of OTP16
69 * - 100: LBGA448 (FFI) => AA = LFBGA 18x18mm 448 balls p. 0.8mm
70 * - 011: LBGA354 (LCI) => AB = LFBGA 16x16mm 359 balls p. 0.8mm
71 * - 010: TFBGA361 (FFC) => AC = TFBGA 12x12mm 361 balls p. 0.5mm
72 * - 001: TFBGA257 (LCC) => AD = TFBGA 10x10mm 257 balls p. 0.5mm
76 #define PKG_MASK GENMASK(2, 0)
79 * early TLB into the .data section so that it not get cleared
80 * with 16kB allignment (see TTBR0_BASE_ADDR_MASK)
82 u8 early_tlb[PGTABLE_SIZE] __section(".data") __aligned(0x4000);
84 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
85 #ifndef CONFIG_TFABOOT
86 static void security_init(void)
88 /* Disable the backup domain write protection */
89 /* the protection is enable at each reset by hardware */
90 /* And must be disable by software */
91 setbits_le32(PWR_CR1, PWR_CR1_DBP);
93 while (!(readl(PWR_CR1) & PWR_CR1_DBP))
96 /* If RTC clock isn't enable so this is a cold boot then we need
97 * to reset the backup domain
99 if (!(readl(RCC_BDCR) & RCC_BDCR_RTCSRC)) {
100 setbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
101 while (!(readl(RCC_BDCR) & RCC_BDCR_VSWRST))
103 clrbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
106 /* allow non secure access in Write/Read for all peripheral */
107 writel(GENMASK(25, 0), ETZPC_DECPROT0);
109 /* Open SYSRAM for no secure access */
110 writel(0x0, ETZPC_TZMA1_SIZE);
112 /* enable TZC1 TZC2 clock */
113 writel(BIT(11) | BIT(12), RCC_MP_APB5ENSETR);
115 /* Region 0 set to no access by default */
116 /* bit 0 / 16 => nsaid0 read/write Enable
117 * bit 1 / 17 => nsaid1 read/write Enable
119 * bit 15 / 31 => nsaid15 read/write Enable
121 writel(0xFFFFFFFF, TZC_REGION_ID_ACCESS0);
122 /* bit 30 / 31 => Secure Global Enable : write/read */
123 /* bit 0 / 1 => Region Enable for filter 0/1 */
124 writel(BIT(0) | BIT(1) | BIT(30) | BIT(31), TZC_REGION_ATTRIBUTE0);
126 /* Enable Filter 0 and 1 */
127 setbits_le32(TZC_GATE_KEEPER, BIT(0) | BIT(1));
129 /* RCC trust zone deactivated */
130 writel(0x0, RCC_TZCR);
132 /* TAMP: deactivate the internal tamper
133 * Bit 23 ITAMP8E: monotonic counter overflow
134 * Bit 20 ITAMP5E: RTC calendar overflow
135 * Bit 19 ITAMP4E: HSE monitoring
136 * Bit 18 ITAMP3E: LSE monitoring
137 * Bit 16 ITAMP1E: RTC power domain supply monitoring
139 writel(0x0, TAMP_CR1);
141 /* GPIOZ: deactivate the security */
142 writel(BIT(0), RCC_MP_AHB5ENSETR);
143 writel(0x0, GPIOZ_SECCFGR);
145 #endif /* CONFIG_TFABOOT */
150 static void dbgmcu_init(void)
152 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
154 /* Freeze IWDG2 if Cortex-A7 is in debug mode */
155 setbits_le32(DBGMCU_APB4FZ1, DBGMCU_APB4FZ1_IWDG2);
157 #endif /* !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) */
159 #if !defined(CONFIG_TFABOOT) && \
160 (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
161 /* get bootmode from ROM code boot context: saved in TAMP register */
162 static void update_bootmode(void)
165 u32 bootrom_itf = readl(BOOTROM_PARAM_ADDR);
166 u32 bootrom_device, bootrom_instance;
168 /* enable TAMP clock = RTCAPBEN */
169 writel(BIT(8), RCC_MP_APB5ENSETR);
171 /* read bootrom context */
173 (bootrom_itf & BOOTROM_MODE_MASK) >> BOOTROM_MODE_SHIFT;
175 (bootrom_itf & BOOTROM_INSTANCE_MASK) >> BOOTROM_INSTANCE_SHIFT;
177 ((bootrom_device << BOOT_TYPE_SHIFT) & BOOT_TYPE_MASK) |
178 ((bootrom_instance << BOOT_INSTANCE_SHIFT) &
181 /* save the boot mode in TAMP backup register */
182 clrsetbits_le32(TAMP_BOOT_CONTEXT,
184 boot_mode << TAMP_BOOT_MODE_SHIFT);
188 u32 get_bootmode(void)
190 /* read bootmode from TAMP backup register */
191 return (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >>
192 TAMP_BOOT_MODE_SHIFT;
196 * initialize the MMU and activate cache in SPL or in U-Boot pre-reloc stage
197 * MMU/TLB is updated in enable_caches() for U-Boot after relocation
198 * or is deactivated in U-Boot entry function start.S::cpu_init_cp15
200 static void early_enable_caches(void)
202 /* I-cache is already enabled in start.S: cpu_init_cp15 */
204 if (CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
207 gd->arch.tlb_size = PGTABLE_SIZE;
208 gd->arch.tlb_addr = (unsigned long)&early_tlb;
212 if (IS_ENABLED(CONFIG_SPL_BUILD))
213 mmu_set_region_dcache_behaviour(STM32_SYSRAM_BASE,
215 DCACHE_DEFAULT_OPTION);
217 mmu_set_region_dcache_behaviour(STM32_DDR_BASE, STM32_DDR_SIZE,
218 DCACHE_DEFAULT_OPTION);
224 int arch_cpu_init(void)
228 early_enable_caches();
230 /* early armv7 timer init: needed for polling */
233 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
235 #ifndef CONFIG_TFABOOT
239 /* Reset Coprocessor state unless it wakes up from Standby power mode */
240 if (!(readl(PWR_MCUCR) & PWR_MCUCR_SBF)) {
241 writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE);
242 writel(0, TAMP_COPRO_RSC_TBL_ADDRESS);
246 boot_mode = get_bootmode();
248 if ((boot_mode & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_UART)
249 gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE;
250 #if defined(CONFIG_DEBUG_UART) && \
251 !defined(CONFIG_TFABOOT) && \
252 (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
260 void enable_caches(void)
262 /* I-cache is already enabled in start.S: icache_enable() not needed */
264 /* deactivate the data cache, early enabled in arch_cpu_init() */
267 * update MMU after relocation and enable the data cache
268 * warning: the TLB location udpated in board_f.c::reserve_mmu
273 static u32 read_idc(void)
275 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
277 return readl(DBGMCU_IDC);
280 u32 get_cpu_dev(void)
282 return (read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT;
285 u32 get_cpu_rev(void)
287 return (read_idc() & DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT;
290 static u32 get_otp(int index, int shift, int mask)
296 ret = uclass_get_device_by_driver(UCLASS_MISC,
297 DM_GET_DRIVER(stm32mp_bsec),
301 ret = misc_read(dev, STM32_BSEC_SHADOW(index),
304 return (otp >> shift) & mask;
307 /* Get Device Part Number (RPN) from OTP */
308 static u32 get_cpu_rpn(void)
310 return get_otp(BSEC_OTP_RPN, RPN_SHIFT, RPN_MASK);
313 u32 get_cpu_type(void)
315 return (get_cpu_dev() << 16) | get_cpu_rpn();
318 /* Get Package options from OTP */
319 u32 get_cpu_package(void)
321 return get_otp(BSEC_OTP_PKG, PKG_SHIFT, PKG_MASK);
324 void get_soc_name(char name[SOC_NAME_SIZE])
326 char *cpu_s, *cpu_r, *pkg;
328 /* MPUs Part Numbers */
329 switch (get_cpu_type()) {
330 case CPU_STM32MP157Fxx:
333 case CPU_STM32MP157Dxx:
336 case CPU_STM32MP157Cxx:
339 case CPU_STM32MP157Axx:
342 case CPU_STM32MP153Fxx:
345 case CPU_STM32MP153Dxx:
348 case CPU_STM32MP153Cxx:
351 case CPU_STM32MP153Axx:
354 case CPU_STM32MP151Fxx:
357 case CPU_STM32MP151Dxx:
360 case CPU_STM32MP151Cxx:
363 case CPU_STM32MP151Axx:
372 switch (get_cpu_package()) {
379 case PKG_AC_TFBGA361:
382 case PKG_AD_TFBGA257:
391 switch (get_cpu_rev()) {
406 snprintf(name, SOC_NAME_SIZE, "STM32MP%s%s Rev.%s", cpu_s, pkg, cpu_r);
409 #if defined(CONFIG_DISPLAY_CPUINFO)
410 int print_cpuinfo(void)
412 char name[SOC_NAME_SIZE];
415 printf("CPU: %s\n", name);
419 #endif /* CONFIG_DISPLAY_CPUINFO */
421 static void setup_boot_mode(void)
423 const u32 serial_addr[] = {
434 u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
436 (boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT;
437 unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
438 u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK);
442 pr_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d forced=%x\n",
443 __func__, boot_ctx, boot_mode, instance, forced_mode);
444 switch (boot_mode & TAMP_BOOT_DEVICE_MASK) {
445 case BOOT_SERIAL_UART:
446 if (instance > ARRAY_SIZE(serial_addr))
448 /* serial : search associated alias in devicetree */
449 sprintf(cmd, "serial@%x", serial_addr[instance]);
450 if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev))
452 if (fdtdec_get_alias_seq(gd->fdt_blob, "serial",
453 dev_of_offset(dev), &alias))
455 sprintf(cmd, "%d", alias);
456 env_set("boot_device", "serial");
457 env_set("boot_instance", cmd);
459 /* restore console on uart when not used */
460 if (gd->cur_serial_dev != dev) {
461 gd->flags &= ~(GD_FLG_SILENT |
462 GD_FLG_DISABLE_CONSOLE);
463 printf("serial boot with console enabled!\n");
466 case BOOT_SERIAL_USB:
467 env_set("boot_device", "usb");
468 env_set("boot_instance", "0");
471 case BOOT_FLASH_EMMC:
472 sprintf(cmd, "%d", instance);
473 env_set("boot_device", "mmc");
474 env_set("boot_instance", cmd);
476 case BOOT_FLASH_NAND:
477 env_set("boot_device", "nand");
478 env_set("boot_instance", "0");
480 case BOOT_FLASH_SPINAND:
481 env_set("boot_device", "spi-nand");
482 env_set("boot_instance", "0");
485 env_set("boot_device", "nor");
486 env_set("boot_instance", "0");
489 pr_debug("unexpected boot mode = %x\n", boot_mode);
493 switch (forced_mode) {
495 printf("Enter fastboot!\n");
496 env_set("preboot", "env set preboot; fastboot 0");
499 env_set("boot_device", "usb");
500 env_set("boot_instance", "0");
505 printf("Enter UMS!\n");
506 instance = forced_mode - BOOT_UMS_MMC0;
507 sprintf(cmd, "env set preboot; ums 0 mmc %d", instance);
508 env_set("preboot", cmd);
511 env_set("preboot", "env set preboot; run altbootcmd");
516 pr_debug("unexpected forced boot mode = %x\n", forced_mode);
520 /* clear TAMP for next reboot */
521 clrsetbits_le32(TAMP_BOOT_CONTEXT, TAMP_BOOT_FORCED_MASK, BOOT_NORMAL);
525 * If there is no MAC address in the environment, then it will be initialized
526 * (silently) from the value in the OTP.
528 __weak int setup_mac_address(void)
530 #if defined(CONFIG_NET)
537 /* MAC already in environment */
538 if (eth_env_get_enetaddr("ethaddr", enetaddr))
541 ret = uclass_get_device_by_driver(UCLASS_MISC,
542 DM_GET_DRIVER(stm32mp_bsec),
547 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_MAC),
552 for (i = 0; i < 6; i++)
553 enetaddr[i] = ((uint8_t *)&otp)[i];
555 if (!is_valid_ethaddr(enetaddr)) {
556 pr_err("invalid MAC address in OTP %pM\n", enetaddr);
559 pr_debug("OTP MAC address = %pM\n", enetaddr);
560 ret = !eth_env_set_enetaddr("ethaddr", enetaddr);
562 pr_err("Failed to set mac address %pM from OTP: %d\n",
569 static int setup_serial_number(void)
571 char serial_string[25];
572 u32 otp[3] = {0, 0, 0 };
576 if (env_get("serial#"))
579 ret = uclass_get_device_by_driver(UCLASS_MISC,
580 DM_GET_DRIVER(stm32mp_bsec),
585 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_SERIAL),
590 sprintf(serial_string, "%08X%08X%08X", otp[0], otp[1], otp[2]);
591 env_set("serial#", serial_string);
596 int arch_misc_init(void)
600 setup_serial_number();