Support for NXP's i.MX8QX SoC
NXP's i.MX8QX is an ARMv8 SoC with 4 Cortex-A35 cores and
system controller (Cortex-M4) inside, documentation can
be found in below link:
https://www.nxp.com/products/processors-and-microcontrollers/
applications-processors/i.mx-applications-processors/i.mx-8-processors:IMX8-SERIES
This patch adds support for booting up SMP linux kernel (v4.9).
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
diff --git a/plat/imx/imx8qx/imx8qx_bl31_setup.c b/plat/imx/imx8qx/imx8qx_bl31_setup.c
new file mode 100644
index 0000000..8dac943
--- /dev/null
+++ b/plat/imx/imx8qx/imx8qx_bl31_setup.c
@@ -0,0 +1,342 @@
+/*
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <assert.h>
+#include <bl_common.h>
+#include <cci.h>
+#include <console.h>
+#include <context.h>
+#include <context_mgmt.h>
+#include <debug.h>
+#include <imx8qx_pads.h>
+#include <imx8_iomux.h>
+#include <imx8_lpuart.h>
+#include <mmio.h>
+#include <platform.h>
+#include <platform_def.h>
+#include <plat_imx8.h>
+#include <sci/sci.h>
+#include <sec_rsrc.h>
+#include <stdbool.h>
+#include <xlat_tables.h>
+
+IMPORT_SYM(unsigned long, __COHERENT_RAM_START__, BL31_COHERENT_RAM_START);
+IMPORT_SYM(unsigned long, __COHERENT_RAM_END__, BL31_COHERENT_RAM_END);
+IMPORT_SYM(unsigned long, __RO_START__, BL31_RO_START);
+IMPORT_SYM(unsigned long, __RO_END__, BL31_RO_END);
+IMPORT_SYM(unsigned long, __RW_START__, BL31_RW_START);
+IMPORT_SYM(unsigned long, __RW_END__, BL31_RW_END);
+
+static entry_point_info_t bl32_image_ep_info;
+static entry_point_info_t bl33_image_ep_info;
+
+#define UART_PAD_CTRL (PADRING_IFMUX_EN_MASK | PADRING_GP_EN_MASK | \
+ (SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) | \
+ (SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) | \
+ (SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) | \
+ (SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
+
+static const mmap_region_t imx_mmap[] = {
+ MAP_REGION_FLAT(IMX_BOOT_UART_BASE, IMX_BOOT_UART_SIZE, MT_DEVICE | MT_RW),
+ MAP_REGION_FLAT(SC_IPC_BASE, SC_IPC_SIZE, MT_DEVICE | MT_RW),
+ MAP_REGION_FLAT(PLAT_GICD_BASE, PLAT_GICD_SIZE, MT_DEVICE | MT_RW),
+ MAP_REGION_FLAT(PLAT_GICR_BASE, PLAT_GICR_SIZE, MT_DEVICE | MT_RW),
+ {0}
+};
+
+static uint32_t get_spsr_for_bl33_entry(void)
+{
+ unsigned long el_status;
+ unsigned long mode;
+ uint32_t spsr;
+
+ /* figure out what mode we enter the non-secure world */
+ el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
+ el_status &= ID_AA64PFR0_ELX_MASK;
+
+ mode = (el_status) ? MODE_EL2 : MODE_EL1;
+
+ spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
+ return spsr;
+}
+
+#if DEBUG_CONSOLE_A35
+static void lpuart32_serial_setbrg(unsigned int base, int baudrate)
+{
+ unsigned int sbr, osr, baud_diff, tmp_osr, tmp_sbr;
+ unsigned int diff1, diff2, tmp, rate;
+
+ if (baudrate == 0)
+ panic();
+
+ sc_pm_get_clock_rate(ipc_handle, SC_R_UART_0, 2, &rate);
+
+ baud_diff = baudrate;
+ osr = 0;
+ sbr = 0;
+ for (tmp_osr = 4; tmp_osr <= 32; tmp_osr++) {
+ tmp_sbr = (rate / (baudrate * tmp_osr));
+ if (tmp_sbr == 0)
+ tmp_sbr = 1;
+
+ /* calculate difference in actual baud w/ current values */
+ diff1 = rate / (tmp_osr * tmp_sbr) - baudrate;
+ diff2 = rate / (tmp_osr * (tmp_sbr + 1));
+
+ /* select best values between sbr and sbr+1 */
+ if (diff1 > (baudrate - diff2)) {
+ diff1 = baudrate - diff2;
+ tmp_sbr++;
+ }
+
+ if (diff1 <= baud_diff) {
+ baud_diff = diff1;
+ osr = tmp_osr;
+ sbr = tmp_sbr;
+ }
+ }
+
+ tmp = mmio_read_32(IMX_BOOT_UART_BASE + BAUD);
+
+ if ((osr > 3) && (osr < 8))
+ tmp |= LPUART_BAUD_BOTHEDGE_MASK;
+
+ tmp &= ~LPUART_BAUD_OSR_MASK;
+ tmp |= LPUART_BAUD_OSR(osr - 1);
+ tmp &= ~LPUART_BAUD_SBR_MASK;
+ tmp |= LPUART_BAUD_SBR(sbr);
+
+ /* explicitly disable 10 bit mode & set 1 stop bit */
+ tmp &= ~(LPUART_BAUD_M10_MASK | LPUART_BAUD_SBNS_MASK);
+
+ mmio_write_32(IMX_BOOT_UART_BASE + BAUD, tmp);
+}
+
+static int lpuart32_serial_init(unsigned int base)
+{
+ unsigned int tmp;
+
+ /* disable TX & RX before enabling clocks */
+ tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
+ tmp &= ~(CTRL_TE | CTRL_RE);
+ mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);
+
+ mmio_write_32(IMX_BOOT_UART_BASE + MODIR, 0);
+ mmio_write_32(IMX_BOOT_UART_BASE + FIFO, ~(FIFO_TXFE | FIFO_RXFE));
+
+ mmio_write_32(IMX_BOOT_UART_BASE + MATCH, 0);
+
+ /* provide data bits, parity, stop bit, etc */
+ lpuart32_serial_setbrg(base, IMX_BOOT_UART_BAUDRATE);
+
+ /* eight data bits no parity bit */
+ tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
+ tmp &= ~(LPUART_CTRL_PE_MASK | LPUART_CTRL_PT_MASK | LPUART_CTRL_M_MASK);
+ mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);
+
+ mmio_write_32(IMX_BOOT_UART_BASE + CTRL, CTRL_RE | CTRL_TE);
+
+ mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
+ mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
+ mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x0A);
+
+ return 0;
+}
+#endif
+
+void imx8_partition_resources(void)
+{
+ sc_rm_pt_t secure_part, os_part;
+ sc_rm_mr_t mr, mr_record = 64;
+ sc_faddr_t start, end;
+ sc_err_t err;
+ bool owned;
+ int i;
+
+ err = sc_rm_get_partition(ipc_handle, &secure_part);
+ if (err)
+ ERROR("sc_rm_get_partition failed: %u\n", err);
+
+ err = sc_rm_partition_alloc(ipc_handle, &os_part, false, false,
+ false, false, false);
+ if (err)
+ ERROR("sc_rm_partition_alloc failed: %u\n", err);
+
+ err = sc_rm_set_parent(ipc_handle, os_part, secure_part);
+ if (err)
+ ERROR("sc_rm_set_parent: %u\n", err);
+
+ /* set secure resources to NOT-movable */
+ for (i = 0; i < (ARRAY_SIZE(secure_rsrcs)); i++) {
+ err = sc_rm_set_resource_movable(ipc_handle,
+ secure_rsrcs[i], secure_rsrcs[i], false);
+ if (err)
+ ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
+ secure_rsrcs[i], err);
+ }
+
+ /* move all movable resources and pins to non-secure partition */
+ err = sc_rm_move_all(ipc_handle, secure_part, os_part, true, true);
+ if (err)
+ ERROR("sc_rm_move_all: %u\n", err);
+
+ /* iterate through peripherals to give NS OS part access */
+ for (i = 0; i < ARRAY_SIZE(ns_access_allowed); i++) {
+ err = sc_rm_set_peripheral_permissions(ipc_handle,
+ ns_access_allowed[i], os_part, SC_RM_PERM_FULL);
+ if (err)
+ ERROR("sc_rm_set_peripheral_permissions: rsrc %u, \
+ ret %u\n", ns_access_allowed[i], err);
+ }
+
+ /*
+ * sc_rm_set_peripheral_permissions
+ * sc_rm_set_memreg_permissions
+ * sc_rm_set_pin_movable
+ */
+ for (mr = 0; mr < 64; mr++) {
+ owned = sc_rm_is_memreg_owned(ipc_handle, mr);
+ if (owned) {
+ err = sc_rm_get_memreg_info(ipc_handle, mr, &start, &end);
+ if (err)
+ ERROR("Memreg get info failed, %u\n", mr);
+
+ NOTICE("Memreg %u 0x%llx -- 0x%llx\n", mr, start, end);
+ if (BL31_BASE >= start && (BL31_LIMIT - 1) <= end) {
+ mr_record = mr; /* Record the mr for ATF running */
+ } else {
+ err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
+ if (err)
+ ERROR("Memreg assign failed, 0x%llx -- 0x%llx, \
+ err %d\n", start, end, err);
+ }
+ }
+ }
+
+ if (mr_record != 64) {
+ err = sc_rm_get_memreg_info(ipc_handle, mr_record, &start, &end);
+ if (err)
+ ERROR("Memreg get info failed, %u\n", mr_record);
+ if ((BL31_LIMIT - 1) < end) {
+ err = sc_rm_memreg_alloc(ipc_handle, &mr, BL31_LIMIT, end);
+ if (err)
+ ERROR("sc_rm_memreg_alloc failed, 0x%llx -- 0x%llx\n",
+ (sc_faddr_t)BL31_LIMIT, end);
+ err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
+ if (err)
+ ERROR("Memreg assign failed, 0x%llx -- 0x%llx\n",
+ (sc_faddr_t)BL31_LIMIT, end);
+ }
+
+ if (start < (BL31_BASE - 1)) {
+ err = sc_rm_memreg_alloc(ipc_handle, &mr, start, BL31_BASE - 1);
+ if (err)
+ ERROR("sc_rm_memreg_alloc failed, 0x%llx -- 0x%llx\n",
+ start, (sc_faddr_t)BL31_BASE - 1);
+ err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
+ if (err)
+ ERROR("Memreg assign failed, 0x%llx -- 0x%llx\n",
+ start, (sc_faddr_t)BL31_BASE - 1);
+ }
+ }
+
+ if (err)
+ NOTICE("Partitioning Failed\n");
+ else
+ NOTICE("Non-secure Partitioning Succeeded\n");
+}
+
+void bl31_early_platform_setup(bl31_params_t *from_bl2,
+ void *plat_params_from_bl2)
+{
+#if DEBUG_CONSOLE
+ static console_lpuart_t console;
+#endif
+ if (sc_ipc_open(&ipc_handle, SC_IPC_BASE) != SC_ERR_NONE)
+ panic();
+
+#if DEBUG_CONSOLE_A35
+ sc_pm_set_resource_power_mode(ipc_handle, SC_R_UART_0, SC_PM_PW_MODE_ON);
+ sc_pm_clock_rate_t rate = 80000000;
+ sc_pm_set_clock_rate(ipc_handle, SC_R_UART_0, 2, &rate);
+ sc_pm_clock_enable(ipc_handle, SC_R_UART_0, 2, true, false);
+
+ /* Configure UART pads */
+ sc_pad_set(ipc_handle, SC_P_UART0_RX, UART_PAD_CTRL);
+ sc_pad_set(ipc_handle, SC_P_UART0_TX, UART_PAD_CTRL);
+ lpuart32_serial_init(IMX_BOOT_UART_BASE);
+#endif
+
+#if DEBUG_CONSOLE
+ console_lpuart_register(IMX_BOOT_UART_BASE, IMX_BOOT_UART_CLK_IN_HZ,
+ IMX_CONSOLE_BAUDRATE, &console);
+#endif
+ /* Turn on MU1 for non-secure OS/Hypervisor */
+ sc_pm_set_resource_power_mode(ipc_handle, SC_R_MU_1A, SC_PM_PW_MODE_ON);
+
+ /*
+ * create new partition for non-secure OS/Hypervisor
+ * uses global structs defined in sec_rsrc.h
+ */
+ imx8_partition_resources();
+
+ bl33_image_ep_info.pc = PLAT_NS_IMAGE_OFFSET;
+ bl33_image_ep_info.spsr = get_spsr_for_bl33_entry();
+ SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
+}
+
+void bl31_plat_arch_setup(void)
+{
+ unsigned long ro_start = BL31_RO_START;
+ unsigned long ro_size = BL31_RO_END - BL31_RO_START;
+ unsigned long rw_start = BL31_RW_START;
+ unsigned long rw_size = BL31_RW_END - BL31_RW_START;
+#if USE_COHERENT_MEM
+ unsigned long coh_start = BL31_COHERENT_RAM_START;
+ unsigned long coh_size = BL31_COHERENT_RAM_END - BL31_COHERENT_RAM_START;
+#endif
+
+ mmap_add_region(ro_start, ro_start, ro_size,
+ MT_RO | MT_MEMORY | MT_SECURE);
+ mmap_add_region(rw_start, rw_start, rw_size,
+ MT_RW | MT_MEMORY | MT_SECURE);
+ mmap_add(imx_mmap);
+
+#if USE_COHERENT_MEM
+ mmap_add_region(coh_start, coh_start, coh_size,
+ MT_DEVICE | MT_RW | MT_SECURE);
+#endif
+
+ init_xlat_tables();
+ enable_mmu_el3(0);
+}
+
+void bl31_platform_setup(void)
+{
+ plat_gic_driver_init();
+ plat_gic_init();
+}
+
+entry_point_info_t *bl31_plat_get_next_image_ep_info(unsigned int type)
+{
+ if (type == NON_SECURE)
+ return &bl33_image_ep_info;
+ if (type == SECURE)
+ return &bl32_image_ep_info;
+
+ return NULL;
+}
+
+unsigned int plat_get_syscnt_freq2(void)
+{
+ return COUNTER_FREQUENCY;
+}
+
+void bl31_plat_runtime_setup(void)
+{
+ return;
+}