--- /dev/null
+/*
+ * Copyright 2017 NXP
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+
+.align 8
+.global rom_pointer
+rom_pointer:
+ .space 256
+
+/*
+ * Routine: save_boot_params (called after reset from start.S)
+ */
+
+.global save_boot_params
+save_boot_params:
+ /* The firmware provided ATAG/FDT address can be found in r2/x0 */
+ adr x0, rom_pointer
+ stp x1, x2, [x0], #16
+ stp x3, x4, [x0], #16
+ stp x5, x6, [x0], #16
+ stp x7, x8, [x0], #16
+ stp x9, x10, [x0], #16
+ stp x11, x12, [x0], #16
+ stp x13, x14, [x0], #16
+ stp x15, x16, [x0], #16
+ stp x17, x18, [x0], #16
+ stp x19, x20, [x0], #16
+ stp x21, x22, [x0], #16
+ stp x23, x24, [x0], #16
+ stp x25, x26, [x0], #16
+ stp x27, x28, [x0], #16
+ stp x29, x30, [x0], #16
+ mov x30, sp
+ str x30, [x0], #8
+
+ /* Returns */
+ b save_boot_params_ret
+
+.global restore_boot_params
+restore_boot_params:
+ adr x0, rom_pointer
+ ldp x1, x2, [x0], #16
+ ldp x3, x4, [x0], #16
+ ldp x5, x6, [x0], #16
+ ldp x7, x8, [x0], #16
+ ldp x9, x10, [x0], #16
+ ldp x11, x12, [x0], #16
+ ldp x13, x14, [x0], #16
+ ldp x15, x16, [x0], #16
+ ldp x17, x18, [x0], #16
+ ldp x19, x20, [x0], #16
+ ldp x21, x22, [x0], #16
+ ldp x23, x24, [x0], #16
+ ldp x25, x26, [x0], #16
+ ldp x27, x28, [x0], #16
+ ldp x29, x30, [x0], #16
+ ldr x0, [x0]
+ mov sp, x0
+ ret
--- /dev/null
+/*
+ * Copyright 2017 NXP
+ *
+ * Peng Fan <peng.fan@nxp.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/mach-imx/hab.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/mach-imx/syscounter.h>
+#include <asm/armv8/mmu.h>
+#include <errno.h>
+#include <fdt_support.h>
+#include <fsl_wdog.h>
+#include <imx_sip.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_SECURE_BOOT)
+struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
+ .bank = 1,
+ .word = 3,
+};
+#endif
+
+int timer_init(void)
+{
+#ifdef CONFIG_SPL_BUILD
+ struct sctr_regs *sctr = (struct sctr_regs *)SYSCNT_CTRL_BASE_ADDR;
+ unsigned long freq = readl(&sctr->cntfid0);
+
+ /* Update with accurate clock frequency */
+ asm volatile("msr cntfrq_el0, %0" : : "r" (freq) : "memory");
+
+ clrsetbits_le32(&sctr->cntcr, SC_CNTCR_FREQ0 | SC_CNTCR_FREQ1,
+ SC_CNTCR_FREQ0 | SC_CNTCR_ENABLE | SC_CNTCR_HDBG);
+#endif
+
+ gd->arch.tbl = 0;
+ gd->arch.tbu = 0;
+
+ return 0;
+}
+
+void enable_tzc380(void)
+{
+ struct iomuxc_gpr_base_regs *gpr =
+ (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
+
+ /* Enable TZASC and lock setting */
+ setbits_le32(&gpr->gpr[10], GPR_TZASC_EN);
+ setbits_le32(&gpr->gpr[10], GPR_TZASC_EN_LOCK);
+}
+
+void set_wdog_reset(struct wdog_regs *wdog)
+{
+ /*
+ * Output WDOG_B signal to reset external pmic or POR_B decided by
+ * the board design. Without external reset, the peripherals/DDR/
+ * PMIC are not reset, that may cause system working abnormal.
+ * WDZST bit is write-once only bit. Align this bit in kernel,
+ * otherwise kernel code will have no chance to set this bit.
+ */
+ setbits_le16(&wdog->wcr, WDOG_WDT_MASK | WDOG_WDZST_MASK);
+}
+
+static struct mm_region imx8m_mem_map[] = {
+ {
+ /* ROM */
+ .virt = 0x0UL,
+ .phys = 0x0UL,
+ .size = 0x100000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ /* OCRAM */
+ .virt = 0x900000UL,
+ .phys = 0x900000UL,
+ .size = 0x200000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ /* AIPS */
+ .virt = 0xB00000UL,
+ .phys = 0xB00000UL,
+ .size = 0x3f500000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+ PTE_BLOCK_NON_SHARE |
+ PTE_BLOCK_PXN | PTE_BLOCK_UXN
+ }, {
+ /* DRAM1 */
+ .virt = 0x40000000UL,
+ .phys = 0x40000000UL,
+ .size = 0xC0000000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ /* DRAM2 */
+ .virt = 0x100000000UL,
+ .phys = 0x100000000UL,
+ .size = 0x040000000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ /* List terminator */
+ 0,
+ }
+};
+
+struct mm_region *mem_map = imx8m_mem_map;
+
+u32 get_cpu_rev(void)
+{
+ struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
+ u32 reg = readl(&ana_pll->digprog);
+ u32 type = (reg >> 16) & 0xff;
+ u32 rom_version;
+
+ reg &= 0xff;
+
+ if (reg == CHIP_REV_1_0) {
+ /*
+ * For B0 chip, the DIGPROG is not updated, still TO1.0.
+ * we have to check ROM version further
+ */
+ rom_version = readl((void __iomem *)ROM_VERSION_A0);
+ if (rom_version != CHIP_REV_1_0) {
+ rom_version = readl((void __iomem *)ROM_VERSION_B0);
+ if (rom_version >= CHIP_REV_2_0)
+ reg = CHIP_REV_2_0;
+ }
+ }
+
+ return (type << 12) | reg;
+}
+
+static void imx_set_wdog_powerdown(bool enable)
+{
+ struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
+ struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
+ struct wdog_regs *wdog3 = (struct wdog_regs *)WDOG3_BASE_ADDR;
+
+ /* Write to the PDE (Power Down Enable) bit */
+ writew(enable, &wdog1->wmcr);
+ writew(enable, &wdog2->wmcr);
+ writew(enable, &wdog3->wmcr);
+}
+
+int arch_cpu_init(void)
+{
+ /*
+ * Init timer at very early state, because sscg pll setting
+ * will use it
+ */
+ timer_init();
+
+ if (IS_ENABLED(CONFIG_SPL_BUILD)) {
+ clock_init();
+ imx_set_wdog_powerdown(false);
+ }
+
+ return 0;
+}
+
+bool is_usb_boot(void)
+{
+ return get_boot_device() == USB_BOOT;
+}
+
+#ifdef CONFIG_OF_SYSTEM_SETUP
+int ft_system_setup(void *blob, bd_t *bd)
+{
+ int i = 0;
+ int rc;
+ int nodeoff;
+
+ /* Disable the CPU idle for A0 chip since the HW does not support it */
+ if (is_soc_rev(CHIP_REV_1_0)) {
+ static const char * const nodes_path[] = {
+ "/cpus/cpu@0",
+ "/cpus/cpu@1",
+ "/cpus/cpu@2",
+ "/cpus/cpu@3",
+ };
+
+ for (i = 0; i < ARRAY_SIZE(nodes_path); i++) {
+ nodeoff = fdt_path_offset(blob, nodes_path[i]);
+ if (nodeoff < 0)
+ continue; /* Not found, skip it */
+
+ printf("Found %s node\n", nodes_path[i]);
+
+ rc = fdt_delprop(blob, nodeoff, "cpu-idle-states");
+ if (rc) {
+ printf("Unable to update property %s:%s, err=%s\n",
+ nodes_path[i], "status", fdt_strerror(rc));
+ return rc;
+ }
+
+ printf("Remove %s:%s\n", nodes_path[i],
+ "cpu-idle-states");
+ }
+ }
+
+ return 0;
+}
+#endif
+
+void reset_cpu(ulong addr)
+{
+ struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
+
+ /* Clear WDA to trigger WDOG_B immediately */
+ writew((WCR_WDE | WCR_SRS), &wdog->wcr);
+
+ while (1) {
+ /*
+ * spin for .5 seconds before reset
+ */
+ }
+}
projects / u-boot / commitdiff