1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
6 #define LOG_CATEGORY LOGC_ARCH
11 #include <debug_uart.h>
19 #include <asm/arch/bsec.h>
20 #include <asm/arch/stm32.h>
21 #include <asm/arch/sys_proto.h>
22 #include <asm/global_data.h>
23 #include <dm/device.h>
24 #include <dm/uclass.h>
25 #include <linux/bitops.h>
28 #define RCC_TZCR (STM32_RCC_BASE + 0x00)
29 #define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C)
30 #define RCC_BDCR (STM32_RCC_BASE + 0x0140)
31 #define RCC_MP_APB5ENSETR (STM32_RCC_BASE + 0x0208)
32 #define RCC_MP_AHB5ENSETR (STM32_RCC_BASE + 0x0210)
33 #define RCC_BDCR_VSWRST BIT(31)
34 #define RCC_BDCR_RTCSRC GENMASK(17, 16)
35 #define RCC_DBGCFGR_DBGCKEN BIT(8)
37 /* Security register */
38 #define ETZPC_TZMA1_SIZE (STM32_ETZPC_BASE + 0x04)
39 #define ETZPC_DECPROT0 (STM32_ETZPC_BASE + 0x10)
41 #define TZC_GATE_KEEPER (STM32_TZC_BASE + 0x008)
42 #define TZC_REGION_ATTRIBUTE0 (STM32_TZC_BASE + 0x110)
43 #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114)
45 #define TAMP_CR1 (STM32_TAMP_BASE + 0x00)
47 #define PWR_CR1 (STM32_PWR_BASE + 0x00)
48 #define PWR_MCUCR (STM32_PWR_BASE + 0x14)
49 #define PWR_CR1_DBP BIT(8)
50 #define PWR_MCUCR_SBF BIT(6)
53 #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00)
54 #define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C)
55 #define DBGMCU_APB4FZ1_IWDG2 BIT(2)
56 #define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0)
57 #define DBGMCU_IDC_DEV_ID_SHIFT 0
58 #define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16)
59 #define DBGMCU_IDC_REV_ID_SHIFT 16
62 #define GPIOZ_SECCFGR 0x54004030
64 /* boot interface from Bootrom
65 * - boot instance = bit 31:16
66 * - boot device = bit 15:0
68 #define BOOTROM_PARAM_ADDR 0x2FFC0078
69 #define BOOTROM_MODE_MASK GENMASK(15, 0)
70 #define BOOTROM_MODE_SHIFT 0
71 #define BOOTROM_INSTANCE_MASK GENMASK(31, 16)
72 #define BOOTROM_INSTANCE_SHIFT 16
74 /* Device Part Number (RPN) = OTP_DATA1 lower 8 bits */
76 #define RPN_MASK GENMASK(7, 0)
78 /* Package = bit 27:29 of OTP16
79 * - 100: LBGA448 (FFI) => AA = LFBGA 18x18mm 448 balls p. 0.8mm
80 * - 011: LBGA354 (LCI) => AB = LFBGA 16x16mm 359 balls p. 0.8mm
81 * - 010: TFBGA361 (FFC) => AC = TFBGA 12x12mm 361 balls p. 0.5mm
82 * - 001: TFBGA257 (LCC) => AD = TFBGA 10x10mm 257 balls p. 0.5mm
86 #define PKG_MASK GENMASK(2, 0)
89 * early TLB into the .data section so that it not get cleared
90 * with 16kB allignment (see TTBR0_BASE_ADDR_MASK)
92 u8 early_tlb[PGTABLE_SIZE] __section(".data") __aligned(0x4000);
96 static void security_init(void)
98 /* Disable the backup domain write protection */
99 /* the protection is enable at each reset by hardware */
100 /* And must be disable by software */
101 setbits_le32(PWR_CR1, PWR_CR1_DBP);
103 while (!(readl(PWR_CR1) & PWR_CR1_DBP))
106 /* If RTC clock isn't enable so this is a cold boot then we need
107 * to reset the backup domain
109 if (!(readl(RCC_BDCR) & RCC_BDCR_RTCSRC)) {
110 setbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
111 while (!(readl(RCC_BDCR) & RCC_BDCR_VSWRST))
113 clrbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
116 /* allow non secure access in Write/Read for all peripheral */
117 writel(GENMASK(25, 0), ETZPC_DECPROT0);
119 /* Open SYSRAM for no secure access */
120 writel(0x0, ETZPC_TZMA1_SIZE);
122 /* enable TZC1 TZC2 clock */
123 writel(BIT(11) | BIT(12), RCC_MP_APB5ENSETR);
125 /* Region 0 set to no access by default */
126 /* bit 0 / 16 => nsaid0 read/write Enable
127 * bit 1 / 17 => nsaid1 read/write Enable
129 * bit 15 / 31 => nsaid15 read/write Enable
131 writel(0xFFFFFFFF, TZC_REGION_ID_ACCESS0);
132 /* bit 30 / 31 => Secure Global Enable : write/read */
133 /* bit 0 / 1 => Region Enable for filter 0/1 */
134 writel(BIT(0) | BIT(1) | BIT(30) | BIT(31), TZC_REGION_ATTRIBUTE0);
136 /* Enable Filter 0 and 1 */
137 setbits_le32(TZC_GATE_KEEPER, BIT(0) | BIT(1));
139 /* RCC trust zone deactivated */
140 writel(0x0, RCC_TZCR);
142 /* TAMP: deactivate the internal tamper
143 * Bit 23 ITAMP8E: monotonic counter overflow
144 * Bit 20 ITAMP5E: RTC calendar overflow
145 * Bit 19 ITAMP4E: HSE monitoring
146 * Bit 18 ITAMP3E: LSE monitoring
147 * Bit 16 ITAMP1E: RTC power domain supply monitoring
149 writel(0x0, TAMP_CR1);
151 /* GPIOZ: deactivate the security */
152 writel(BIT(0), RCC_MP_AHB5ENSETR);
153 writel(0x0, GPIOZ_SECCFGR);
159 static void dbgmcu_init(void)
162 * Freeze IWDG2 if Cortex-A7 is in debug mode
163 * done in TF-A for TRUSTED boot and
164 * DBGMCU access is controlled by BSEC_DENABLE.DBGSWENABLE
166 if (bsec_dbgswenable()) {
167 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
168 setbits_le32(DBGMCU_APB4FZ1, DBGMCU_APB4FZ1_IWDG2);
172 void spl_board_init(void)
179 /* force probe of BSEC driver to shadow the upper OTP */
180 ret = uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(stm32mp_bsec), &dev);
182 log_warning("BSEC probe failed: %d\n", ret);
185 /* get bootmode from ROM code boot context: saved in TAMP register */
186 static void update_bootmode(void)
189 u32 bootrom_itf = readl(BOOTROM_PARAM_ADDR);
190 u32 bootrom_device, bootrom_instance;
192 /* enable TAMP clock = RTCAPBEN */
193 writel(BIT(8), RCC_MP_APB5ENSETR);
195 /* read bootrom context */
197 (bootrom_itf & BOOTROM_MODE_MASK) >> BOOTROM_MODE_SHIFT;
199 (bootrom_itf & BOOTROM_INSTANCE_MASK) >> BOOTROM_INSTANCE_SHIFT;
201 ((bootrom_device << BOOT_TYPE_SHIFT) & BOOT_TYPE_MASK) |
202 ((bootrom_instance << BOOT_INSTANCE_SHIFT) &
205 /* save the boot mode in TAMP backup register */
206 clrsetbits_le32(TAMP_BOOT_CONTEXT,
208 boot_mode << TAMP_BOOT_MODE_SHIFT);
211 u32 get_bootmode(void)
213 /* read bootmode from TAMP backup register */
214 return (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >>
215 TAMP_BOOT_MODE_SHIFT;
219 * weak function overidde: set the DDR/SYSRAM executable before to enable the
220 * MMU and configure DACR, for early early_enable_caches (SPL or pre-reloc)
222 void dram_bank_mmu_setup(int bank)
224 struct bd_info *bd = gd->bd;
228 bool use_lmb = false;
229 enum dcache_option option;
231 if (IS_ENABLED(CONFIG_SPL_BUILD)) {
232 start = ALIGN_DOWN(STM32_SYSRAM_BASE, MMU_SECTION_SIZE);
233 size = ALIGN(STM32_SYSRAM_SIZE, MMU_SECTION_SIZE);
234 } else if (gd->flags & GD_FLG_RELOC) {
235 /* bd->bi_dram is available only after relocation */
236 start = bd->bi_dram[bank].start;
237 size = bd->bi_dram[bank].size;
240 /* mark cacheable and executable the beggining of the DDR */
241 start = STM32_DDR_BASE;
242 size = CONFIG_DDR_CACHEABLE_SIZE;
245 for (i = start >> MMU_SECTION_SHIFT;
246 i < (start >> MMU_SECTION_SHIFT) + (size >> MMU_SECTION_SHIFT);
248 option = DCACHE_DEFAULT_OPTION;
249 if (use_lmb && lmb_is_reserved_flags(&lmb, i << MMU_SECTION_SHIFT, LMB_NOMAP))
250 option = 0; /* INVALID ENTRY in TLB */
251 set_section_dcache(i, option);
255 * initialize the MMU and activate cache in SPL or in U-Boot pre-reloc stage
256 * MMU/TLB is updated in enable_caches() for U-Boot after relocation
257 * or is deactivated in U-Boot entry function start.S::cpu_init_cp15
259 static void early_enable_caches(void)
261 /* I-cache is already enabled in start.S: cpu_init_cp15 */
263 if (CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
266 if (!(CONFIG_IS_ENABLED(SYS_ICACHE_OFF) && CONFIG_IS_ENABLED(SYS_DCACHE_OFF))) {
267 gd->arch.tlb_size = PGTABLE_SIZE;
268 gd->arch.tlb_addr = (unsigned long)&early_tlb;
271 /* enable MMU (default configuration) */
278 int arch_cpu_init(void)
282 early_enable_caches();
284 /* early armv7 timer init: needed for polling */
287 if (IS_ENABLED(CONFIG_SPL_BUILD)) {
291 /* reset copro state in SPL, when used, or in U-Boot */
292 if (!IS_ENABLED(CONFIG_SPL) || IS_ENABLED(CONFIG_SPL_BUILD)) {
293 /* Reset Coprocessor state unless it wakes up from Standby power mode */
294 if (!(readl(PWR_MCUCR) & PWR_MCUCR_SBF)) {
295 writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE);
296 writel(0, TAMP_COPRO_RSC_TBL_ADDRESS);
300 boot_mode = get_bootmode();
302 if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL) &&
303 (boot_mode & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_UART)
304 gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE;
305 else if (IS_ENABLED(CONFIG_DEBUG_UART) && IS_ENABLED(CONFIG_SPL_BUILD))
311 void enable_caches(void)
313 /* parse device tree when data cache is still activated */
314 lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
316 /* I-cache is already enabled in start.S: icache_enable() not needed */
318 /* deactivate the data cache, early enabled in arch_cpu_init() */
321 * update MMU after relocation and enable the data cache
322 * warning: the TLB location udpated in board_f.c::reserve_mmu
327 static u32 read_idc(void)
329 /* DBGMCU access is controlled by BSEC_DENABLE.DBGSWENABLE */
330 if (bsec_dbgswenable()) {
331 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
333 return readl(DBGMCU_IDC);
336 if (CONFIG_IS_ENABLED(STM32MP15x))
337 return CPU_DEV_STM32MP15; /* STM32MP15x and unknown revision */
342 u32 get_cpu_dev(void)
344 return (read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT;
347 u32 get_cpu_rev(void)
349 return (read_idc() & DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT;
352 static u32 get_otp(int index, int shift, int mask)
358 ret = uclass_get_device_by_driver(UCLASS_MISC,
359 DM_DRIVER_GET(stm32mp_bsec),
363 ret = misc_read(dev, STM32_BSEC_SHADOW(index),
366 return (otp >> shift) & mask;
369 /* Get Device Part Number (RPN) from OTP */
370 static u32 get_cpu_rpn(void)
372 return get_otp(BSEC_OTP_RPN, RPN_SHIFT, RPN_MASK);
375 u32 get_cpu_type(void)
377 return (get_cpu_dev() << 16) | get_cpu_rpn();
380 /* Get Package options from OTP */
381 u32 get_cpu_package(void)
383 return get_otp(BSEC_OTP_PKG, PKG_SHIFT, PKG_MASK);
386 static const char * const soc_type[] = {
388 "151C", "151A", "151F", "151D",
389 "153C", "153A", "153F", "153D",
390 "157C", "157A", "157F", "157D"
393 static const char * const soc_pkg[] = { "??", "AD", "AC", "AB", "AA" };
394 static const char * const soc_rev[] = { "?", "A", "B", "Z" };
396 static void get_cpu_string_offsets(unsigned int *type, unsigned int *pkg,
399 u32 cpu_type = get_cpu_type();
400 u32 ct = cpu_type & ~(BIT(7) | BIT(0));
401 u32 cm = ((cpu_type & BIT(7)) >> 6) | (cpu_type & BIT(0));
402 u32 cp = get_cpu_package();
404 /* Bits 0 and 7 are the ACDF, 00:C 01:A 10:F 11:D */
406 case CPU_STM32MP151Cxx:
409 case CPU_STM32MP153Cxx:
412 case CPU_STM32MP157Cxx:
424 case PKG_AC_TFBGA361:
425 case PKG_AD_TFBGA257:
434 switch (get_cpu_rev()) {
450 void get_soc_name(char name[SOC_NAME_SIZE])
452 unsigned int type, pkg, rev;
454 get_cpu_string_offsets(&type, &pkg, &rev);
456 snprintf(name, SOC_NAME_SIZE, "STM32MP%s%s Rev.%s",
457 soc_type[type], soc_pkg[pkg], soc_rev[rev]);
460 /* used when CONFIG_DISPLAY_CPUINFO is activated */
461 int print_cpuinfo(void)
463 char name[SOC_NAME_SIZE];
466 printf("CPU: %s\n", name);
471 static void setup_boot_mode(void)
473 const u32 serial_addr[] = {
483 const u32 sdmmc_addr[] = {
489 u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
491 (boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT;
492 unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
493 u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK);
496 log_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d forced=%x\n",
497 __func__, boot_ctx, boot_mode, instance, forced_mode);
498 switch (boot_mode & TAMP_BOOT_DEVICE_MASK) {
499 case BOOT_SERIAL_UART:
500 if (instance > ARRAY_SIZE(serial_addr))
502 /* serial : search associated node in devicetree */
503 sprintf(cmd, "serial@%x", serial_addr[instance]);
504 if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev)) {
505 /* restore console on error */
506 if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL))
507 gd->flags &= ~(GD_FLG_SILENT |
508 GD_FLG_DISABLE_CONSOLE);
509 log_err("uart%d = %s not found in device tree!\n",
513 sprintf(cmd, "%d", dev_seq(dev));
514 env_set("boot_device", "serial");
515 env_set("boot_instance", cmd);
517 /* restore console on uart when not used */
518 if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL) && gd->cur_serial_dev != dev) {
519 gd->flags &= ~(GD_FLG_SILENT |
520 GD_FLG_DISABLE_CONSOLE);
521 log_info("serial boot with console enabled!\n");
524 case BOOT_SERIAL_USB:
525 env_set("boot_device", "usb");
526 env_set("boot_instance", "0");
529 case BOOT_FLASH_EMMC:
530 if (instance > ARRAY_SIZE(sdmmc_addr))
532 /* search associated sdmmc node in devicetree */
533 sprintf(cmd, "mmc@%x", sdmmc_addr[instance]);
534 if (uclass_get_device_by_name(UCLASS_MMC, cmd, &dev)) {
535 printf("mmc%d = %s not found in device tree!\n",
539 sprintf(cmd, "%d", dev_seq(dev));
540 env_set("boot_device", "mmc");
541 env_set("boot_instance", cmd);
543 case BOOT_FLASH_NAND:
544 env_set("boot_device", "nand");
545 env_set("boot_instance", "0");
547 case BOOT_FLASH_SPINAND:
548 env_set("boot_device", "spi-nand");
549 env_set("boot_instance", "0");
552 env_set("boot_device", "nor");
553 env_set("boot_instance", "0");
556 env_set("boot_device", "invalid");
557 env_set("boot_instance", "");
558 log_err("unexpected boot mode = %x\n", boot_mode);
562 switch (forced_mode) {
564 log_info("Enter fastboot!\n");
565 env_set("preboot", "env set preboot; fastboot 0");
568 env_set("boot_device", "usb");
569 env_set("boot_instance", "0");
574 log_info("Enter UMS!\n");
575 instance = forced_mode - BOOT_UMS_MMC0;
576 sprintf(cmd, "env set preboot; ums 0 mmc %d", instance);
577 env_set("preboot", cmd);
580 env_set("preboot", "env set preboot; run altbootcmd");
585 log_debug("unexpected forced boot mode = %x\n", forced_mode);
589 /* clear TAMP for next reboot */
590 clrsetbits_le32(TAMP_BOOT_CONTEXT, TAMP_BOOT_FORCED_MASK, BOOT_NORMAL);
594 * If there is no MAC address in the environment, then it will be initialized
595 * (silently) from the value in the OTP.
597 __weak int setup_mac_address(void)
605 if (!IS_ENABLED(CONFIG_NET))
608 /* MAC already in environment */
609 if (eth_env_get_enetaddr("ethaddr", enetaddr))
612 ret = uclass_get_device_by_driver(UCLASS_MISC,
613 DM_DRIVER_GET(stm32mp_bsec),
618 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_MAC),
623 for (i = 0; i < 6; i++)
624 enetaddr[i] = ((uint8_t *)&otp)[i];
626 if (!is_valid_ethaddr(enetaddr)) {
627 log_err("invalid MAC address in OTP %pM\n", enetaddr);
630 log_debug("OTP MAC address = %pM\n", enetaddr);
631 ret = eth_env_set_enetaddr("ethaddr", enetaddr);
633 log_err("Failed to set mac address %pM from OTP: %d\n", enetaddr, ret);
638 static int setup_serial_number(void)
640 char serial_string[25];
641 u32 otp[3] = {0, 0, 0 };
645 if (env_get("serial#"))
648 ret = uclass_get_device_by_driver(UCLASS_MISC,
649 DM_DRIVER_GET(stm32mp_bsec),
654 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_SERIAL),
659 sprintf(serial_string, "%08X%08X%08X", otp[0], otp[1], otp[2]);
660 env_set("serial#", serial_string);
665 static void setup_soc_type_pkg_rev(void)
667 unsigned int type, pkg, rev;
669 get_cpu_string_offsets(&type, &pkg, &rev);
671 env_set("soc_type", soc_type[type]);
672 env_set("soc_pkg", soc_pkg[pkg]);
673 env_set("soc_rev", soc_rev[rev]);
676 int arch_misc_init(void)
680 setup_serial_number();
681 setup_soc_type_pkg_rev();