1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
8 #include <debug_uart.h>
13 #include <asm/arch/stm32.h>
14 #include <asm/arch/sys_proto.h>
15 #include <dm/device.h>
16 #include <dm/uclass.h>
19 #define RCC_TZCR (STM32_RCC_BASE + 0x00)
20 #define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C)
21 #define RCC_BDCR (STM32_RCC_BASE + 0x0140)
22 #define RCC_MP_APB5ENSETR (STM32_RCC_BASE + 0x0208)
23 #define RCC_MP_AHB5ENSETR (STM32_RCC_BASE + 0x0210)
24 #define RCC_BDCR_VSWRST BIT(31)
25 #define RCC_BDCR_RTCSRC GENMASK(17, 16)
26 #define RCC_DBGCFGR_DBGCKEN BIT(8)
28 /* Security register */
29 #define ETZPC_TZMA1_SIZE (STM32_ETZPC_BASE + 0x04)
30 #define ETZPC_DECPROT0 (STM32_ETZPC_BASE + 0x10)
32 #define TZC_GATE_KEEPER (STM32_TZC_BASE + 0x008)
33 #define TZC_REGION_ATTRIBUTE0 (STM32_TZC_BASE + 0x110)
34 #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114)
36 #define TAMP_CR1 (STM32_TAMP_BASE + 0x00)
38 #define PWR_CR1 (STM32_PWR_BASE + 0x00)
39 #define PWR_MCUCR (STM32_PWR_BASE + 0x14)
40 #define PWR_CR1_DBP BIT(8)
41 #define PWR_MCUCR_SBF BIT(6)
44 #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00)
45 #define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C)
46 #define DBGMCU_APB4FZ1_IWDG2 BIT(2)
47 #define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0)
48 #define DBGMCU_IDC_DEV_ID_SHIFT 0
49 #define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16)
50 #define DBGMCU_IDC_REV_ID_SHIFT 16
53 #define GPIOZ_SECCFGR 0x54004030
55 /* boot interface from Bootrom
56 * - boot instance = bit 31:16
57 * - boot device = bit 15:0
59 #define BOOTROM_PARAM_ADDR 0x2FFC0078
60 #define BOOTROM_MODE_MASK GENMASK(15, 0)
61 #define BOOTROM_MODE_SHIFT 0
62 #define BOOTROM_INSTANCE_MASK GENMASK(31, 16)
63 #define BOOTROM_INSTANCE_SHIFT 16
65 /* Device Part Number (RPN) = OTP_DATA1 lower 8 bits */
67 #define RPN_MASK GENMASK(7, 0)
69 /* Package = bit 27:29 of OTP16
70 * - 100: LBGA448 (FFI) => AA = LFBGA 18x18mm 448 balls p. 0.8mm
71 * - 011: LBGA354 (LCI) => AB = LFBGA 16x16mm 359 balls p. 0.8mm
72 * - 010: TFBGA361 (FFC) => AC = TFBGA 12x12mm 361 balls p. 0.5mm
73 * - 001: TFBGA257 (LCC) => AD = TFBGA 10x10mm 257 balls p. 0.5mm
77 #define PKG_MASK GENMASK(2, 0)
80 * early TLB into the .data section so that it not get cleared
81 * with 16kB allignment (see TTBR0_BASE_ADDR_MASK)
83 u8 early_tlb[PGTABLE_SIZE] __section(".data") __aligned(0x4000);
85 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
86 #ifndef CONFIG_TFABOOT
87 static void security_init(void)
89 /* Disable the backup domain write protection */
90 /* the protection is enable at each reset by hardware */
91 /* And must be disable by software */
92 setbits_le32(PWR_CR1, PWR_CR1_DBP);
94 while (!(readl(PWR_CR1) & PWR_CR1_DBP))
97 /* If RTC clock isn't enable so this is a cold boot then we need
98 * to reset the backup domain
100 if (!(readl(RCC_BDCR) & RCC_BDCR_RTCSRC)) {
101 setbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
102 while (!(readl(RCC_BDCR) & RCC_BDCR_VSWRST))
104 clrbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
107 /* allow non secure access in Write/Read for all peripheral */
108 writel(GENMASK(25, 0), ETZPC_DECPROT0);
110 /* Open SYSRAM for no secure access */
111 writel(0x0, ETZPC_TZMA1_SIZE);
113 /* enable TZC1 TZC2 clock */
114 writel(BIT(11) | BIT(12), RCC_MP_APB5ENSETR);
116 /* Region 0 set to no access by default */
117 /* bit 0 / 16 => nsaid0 read/write Enable
118 * bit 1 / 17 => nsaid1 read/write Enable
120 * bit 15 / 31 => nsaid15 read/write Enable
122 writel(0xFFFFFFFF, TZC_REGION_ID_ACCESS0);
123 /* bit 30 / 31 => Secure Global Enable : write/read */
124 /* bit 0 / 1 => Region Enable for filter 0/1 */
125 writel(BIT(0) | BIT(1) | BIT(30) | BIT(31), TZC_REGION_ATTRIBUTE0);
127 /* Enable Filter 0 and 1 */
128 setbits_le32(TZC_GATE_KEEPER, BIT(0) | BIT(1));
130 /* RCC trust zone deactivated */
131 writel(0x0, RCC_TZCR);
133 /* TAMP: deactivate the internal tamper
134 * Bit 23 ITAMP8E: monotonic counter overflow
135 * Bit 20 ITAMP5E: RTC calendar overflow
136 * Bit 19 ITAMP4E: HSE monitoring
137 * Bit 18 ITAMP3E: LSE monitoring
138 * Bit 16 ITAMP1E: RTC power domain supply monitoring
140 writel(0x0, TAMP_CR1);
142 /* GPIOZ: deactivate the security */
143 writel(BIT(0), RCC_MP_AHB5ENSETR);
144 writel(0x0, GPIOZ_SECCFGR);
146 #endif /* CONFIG_TFABOOT */
151 static void dbgmcu_init(void)
153 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
155 /* Freeze IWDG2 if Cortex-A7 is in debug mode */
156 setbits_le32(DBGMCU_APB4FZ1, DBGMCU_APB4FZ1_IWDG2);
158 #endif /* !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) */
160 #if !defined(CONFIG_TFABOOT) && \
161 (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
162 /* get bootmode from ROM code boot context: saved in TAMP register */
163 static void update_bootmode(void)
166 u32 bootrom_itf = readl(BOOTROM_PARAM_ADDR);
167 u32 bootrom_device, bootrom_instance;
169 /* enable TAMP clock = RTCAPBEN */
170 writel(BIT(8), RCC_MP_APB5ENSETR);
172 /* read bootrom context */
174 (bootrom_itf & BOOTROM_MODE_MASK) >> BOOTROM_MODE_SHIFT;
176 (bootrom_itf & BOOTROM_INSTANCE_MASK) >> BOOTROM_INSTANCE_SHIFT;
178 ((bootrom_device << BOOT_TYPE_SHIFT) & BOOT_TYPE_MASK) |
179 ((bootrom_instance << BOOT_INSTANCE_SHIFT) &
182 /* save the boot mode in TAMP backup register */
183 clrsetbits_le32(TAMP_BOOT_CONTEXT,
185 boot_mode << TAMP_BOOT_MODE_SHIFT);
189 u32 get_bootmode(void)
191 /* read bootmode from TAMP backup register */
192 return (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >>
193 TAMP_BOOT_MODE_SHIFT;
197 * initialize the MMU and activate cache in SPL or in U-Boot pre-reloc stage
198 * MMU/TLB is updated in enable_caches() for U-Boot after relocation
199 * or is deactivated in U-Boot entry function start.S::cpu_init_cp15
201 static void early_enable_caches(void)
203 /* I-cache is already enabled in start.S: cpu_init_cp15 */
205 if (CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
208 gd->arch.tlb_size = PGTABLE_SIZE;
209 gd->arch.tlb_addr = (unsigned long)&early_tlb;
213 if (IS_ENABLED(CONFIG_SPL_BUILD))
214 mmu_set_region_dcache_behaviour(STM32_SYSRAM_BASE,
216 DCACHE_DEFAULT_OPTION);
218 mmu_set_region_dcache_behaviour(STM32_DDR_BASE, STM32_DDR_SIZE,
219 DCACHE_DEFAULT_OPTION);
225 int arch_cpu_init(void)
229 early_enable_caches();
231 /* early armv7 timer init: needed for polling */
234 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
236 #ifndef CONFIG_TFABOOT
240 /* Reset Coprocessor state unless it wakes up from Standby power mode */
241 if (!(readl(PWR_MCUCR) & PWR_MCUCR_SBF)) {
242 writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE);
243 writel(0, TAMP_COPRO_RSC_TBL_ADDRESS);
247 boot_mode = get_bootmode();
249 if ((boot_mode & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_UART)
250 gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE;
251 #if defined(CONFIG_DEBUG_UART) && \
252 !defined(CONFIG_TFABOOT) && \
253 (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
261 void enable_caches(void)
263 /* I-cache is already enabled in start.S: icache_enable() not needed */
265 /* deactivate the data cache, early enabled in arch_cpu_init() */
268 * update MMU after relocation and enable the data cache
269 * warning: the TLB location udpated in board_f.c::reserve_mmu
274 static u32 read_idc(void)
276 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
278 return readl(DBGMCU_IDC);
281 u32 get_cpu_dev(void)
283 return (read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT;
286 u32 get_cpu_rev(void)
288 return (read_idc() & DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT;
291 static u32 get_otp(int index, int shift, int mask)
297 ret = uclass_get_device_by_driver(UCLASS_MISC,
298 DM_GET_DRIVER(stm32mp_bsec),
302 ret = misc_read(dev, STM32_BSEC_SHADOW(index),
305 return (otp >> shift) & mask;
308 /* Get Device Part Number (RPN) from OTP */
309 static u32 get_cpu_rpn(void)
311 return get_otp(BSEC_OTP_RPN, RPN_SHIFT, RPN_MASK);
314 u32 get_cpu_type(void)
316 return (get_cpu_dev() << 16) | get_cpu_rpn();
319 /* Get Package options from OTP */
320 u32 get_cpu_package(void)
322 return get_otp(BSEC_OTP_PKG, PKG_SHIFT, PKG_MASK);
325 void get_soc_name(char name[SOC_NAME_SIZE])
327 char *cpu_s, *cpu_r, *pkg;
329 /* MPUs Part Numbers */
330 switch (get_cpu_type()) {
331 case CPU_STM32MP157Fxx:
334 case CPU_STM32MP157Dxx:
337 case CPU_STM32MP157Cxx:
340 case CPU_STM32MP157Axx:
343 case CPU_STM32MP153Fxx:
346 case CPU_STM32MP153Dxx:
349 case CPU_STM32MP153Cxx:
352 case CPU_STM32MP153Axx:
355 case CPU_STM32MP151Fxx:
358 case CPU_STM32MP151Dxx:
361 case CPU_STM32MP151Cxx:
364 case CPU_STM32MP151Axx:
373 switch (get_cpu_package()) {
380 case PKG_AC_TFBGA361:
383 case PKG_AD_TFBGA257:
392 switch (get_cpu_rev()) {
407 snprintf(name, SOC_NAME_SIZE, "STM32MP%s%s Rev.%s", cpu_s, pkg, cpu_r);
410 #if defined(CONFIG_DISPLAY_CPUINFO)
411 int print_cpuinfo(void)
413 char name[SOC_NAME_SIZE];
416 printf("CPU: %s\n", name);
420 #endif /* CONFIG_DISPLAY_CPUINFO */
422 static void setup_boot_mode(void)
424 const u32 serial_addr[] = {
435 u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
437 (boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT;
438 unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
439 u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK);
443 pr_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d forced=%x\n",
444 __func__, boot_ctx, boot_mode, instance, forced_mode);
445 switch (boot_mode & TAMP_BOOT_DEVICE_MASK) {
446 case BOOT_SERIAL_UART:
447 if (instance > ARRAY_SIZE(serial_addr))
449 /* serial : search associated alias in devicetree */
450 sprintf(cmd, "serial@%x", serial_addr[instance]);
451 if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev))
453 if (fdtdec_get_alias_seq(gd->fdt_blob, "serial",
454 dev_of_offset(dev), &alias))
456 sprintf(cmd, "%d", alias);
457 env_set("boot_device", "serial");
458 env_set("boot_instance", cmd);
460 /* restore console on uart when not used */
461 if (gd->cur_serial_dev != dev) {
462 gd->flags &= ~(GD_FLG_SILENT |
463 GD_FLG_DISABLE_CONSOLE);
464 printf("serial boot with console enabled!\n");
467 case BOOT_SERIAL_USB:
468 env_set("boot_device", "usb");
469 env_set("boot_instance", "0");
472 case BOOT_FLASH_EMMC:
473 sprintf(cmd, "%d", instance);
474 env_set("boot_device", "mmc");
475 env_set("boot_instance", cmd);
477 case BOOT_FLASH_NAND:
478 env_set("boot_device", "nand");
479 env_set("boot_instance", "0");
481 case BOOT_FLASH_SPINAND:
482 env_set("boot_device", "spi-nand");
483 env_set("boot_instance", "0");
486 env_set("boot_device", "nor");
487 env_set("boot_instance", "0");
490 pr_debug("unexpected boot mode = %x\n", boot_mode);
494 switch (forced_mode) {
496 printf("Enter fastboot!\n");
497 env_set("preboot", "env set preboot; fastboot 0");
500 env_set("boot_device", "usb");
501 env_set("boot_instance", "0");
506 printf("Enter UMS!\n");
507 instance = forced_mode - BOOT_UMS_MMC0;
508 sprintf(cmd, "env set preboot; ums 0 mmc %d", instance);
509 env_set("preboot", cmd);
512 env_set("preboot", "env set preboot; run altbootcmd");
517 pr_debug("unexpected forced boot mode = %x\n", forced_mode);
521 /* clear TAMP for next reboot */
522 clrsetbits_le32(TAMP_BOOT_CONTEXT, TAMP_BOOT_FORCED_MASK, BOOT_NORMAL);
526 * If there is no MAC address in the environment, then it will be initialized
527 * (silently) from the value in the OTP.
529 __weak int setup_mac_address(void)
531 #if defined(CONFIG_NET)
538 /* MAC already in environment */
539 if (eth_env_get_enetaddr("ethaddr", enetaddr))
542 ret = uclass_get_device_by_driver(UCLASS_MISC,
543 DM_GET_DRIVER(stm32mp_bsec),
548 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_MAC),
553 for (i = 0; i < 6; i++)
554 enetaddr[i] = ((uint8_t *)&otp)[i];
556 if (!is_valid_ethaddr(enetaddr)) {
557 pr_err("invalid MAC address in OTP %pM\n", enetaddr);
560 pr_debug("OTP MAC address = %pM\n", enetaddr);
561 ret = !eth_env_set_enetaddr("ethaddr", enetaddr);
563 pr_err("Failed to set mac address %pM from OTP: %d\n",
570 static int setup_serial_number(void)
572 char serial_string[25];
573 u32 otp[3] = {0, 0, 0 };
577 if (env_get("serial#"))
580 ret = uclass_get_device_by_driver(UCLASS_MISC,
581 DM_GET_DRIVER(stm32mp_bsec),
586 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_SERIAL),
591 sprintf(serial_string, "%08X%08X%08X", otp[0], otp[1], otp[2]);
592 env_set("serial#", serial_string);
597 int arch_misc_init(void)
601 setup_serial_number();