Add SoC level initialization code - arch_cpu_init - mmu table - detect cpu revision - reset cpu and wdog settings - timer init - wdog settings - lowlevel init to save/restore registers - a few dummy header file to avoid build failure - ft_system_setup
Signed-off-by: Peng Fan peng.fan@nxp.com Cc: Stefano Babic sbabic@denx.de Cc: Fabio Estevam fabio.estevam@nxp.com --- arch/arm/include/asm/arch-mx8m/crm_regs.h | 10 ++ arch/arm/include/asm/arch-mx8m/gpio.h | 12 ++ arch/arm/include/asm/arch-mx8m/sys_proto.h | 18 +++ arch/arm/mach-imx/Makefile | 2 +- arch/arm/mach-imx/mx8m/Makefile | 3 +- arch/arm/mach-imx/mx8m/lowlevel_init.S | 63 ++++++++ arch/arm/mach-imx/mx8m/soc.c | 227 +++++++++++++++++++++++++++++ 7 files changed, 333 insertions(+), 2 deletions(-) create mode 100644 arch/arm/include/asm/arch-mx8m/crm_regs.h create mode 100644 arch/arm/include/asm/arch-mx8m/gpio.h create mode 100644 arch/arm/include/asm/arch-mx8m/sys_proto.h create mode 100644 arch/arm/mach-imx/mx8m/lowlevel_init.S create mode 100644 arch/arm/mach-imx/mx8m/soc.c
diff --git a/arch/arm/include/asm/arch-mx8m/crm_regs.h b/arch/arm/include/asm/arch-mx8m/crm_regs.h new file mode 100644 index 0000000000..6582318983 --- /dev/null +++ b/arch/arm/include/asm/arch-mx8m/crm_regs.h @@ -0,0 +1,10 @@ +/* + * Copyright 2017 NXP + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ASM_ARCH_MX8M_CRM_REGS_H +#define _ASM_ARCH_MX8M_CRM_REGS_H +/* Dummy header, some imx-common code needs this file */ +#endif diff --git a/arch/arm/include/asm/arch-mx8m/gpio.h b/arch/arm/include/asm/arch-mx8m/gpio.h new file mode 100644 index 0000000000..b666d37700 --- /dev/null +++ b/arch/arm/include/asm/arch-mx8m/gpio.h @@ -0,0 +1,12 @@ +/* + * Copyright 2017 NXP + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ASM_ARCH_MX8M_GPIO_H +#define __ASM_ARCH_MX8M_GPIO_H + +#include <asm/mach-imx/gpio.h> + +#endif diff --git a/arch/arm/include/asm/arch-mx8m/sys_proto.h b/arch/arm/include/asm/arch-mx8m/sys_proto.h new file mode 100644 index 0000000000..8bf9ac6697 --- /dev/null +++ b/arch/arm/include/asm/arch-mx8m/sys_proto.h @@ -0,0 +1,18 @@ +/* + * Copyright (C) 2017 NXP + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ARCH_MX8M_SYS_PROTO_H +#define __ARCH_MX8M_SYS_PROTO_H + +#include <asm/mach-imx/sys_proto.h> + +void set_wdog_reset(struct wdog_regs *wdog); +void enable_tzc380(void); +void restore_boot_params(void); +extern unsigned long rom_pointer[]; +enum boot_device get_boot_device(void); +bool is_usb_boot(void); +#endif diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index e38b560d51..4c4e15c6e7 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -132,4 +132,4 @@ obj-$(CONFIG_MX5) += mx5/ obj-$(CONFIG_MX6) += mx6/ obj-$(CONFIG_MX7) += mx7/ obj-$(CONFIG_ARCH_MX7ULP) += mx7ulp/ - +obj-$(CONFIG_MX8M) += mx8m/ diff --git a/arch/arm/mach-imx/mx8m/Makefile b/arch/arm/mach-imx/mx8m/Makefile index 05f38842f0..b1c5d74aab 100644 --- a/arch/arm/mach-imx/mx8m/Makefile +++ b/arch/arm/mach-imx/mx8m/Makefile @@ -4,4 +4,5 @@ # SPDX-License-Identifier: GPL-2.0+ #
-obj-y += clock.o clock_slice.o +obj-y += lowlevel_init.o +obj-y += clock.o clock_slice.o soc.o diff --git a/arch/arm/mach-imx/mx8m/lowlevel_init.S b/arch/arm/mach-imx/mx8m/lowlevel_init.S new file mode 100644 index 0000000000..d388f3ba95 --- /dev/null +++ b/arch/arm/mach-imx/mx8m/lowlevel_init.S @@ -0,0 +1,63 @@ +/* + * 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 diff --git a/arch/arm/mach-imx/mx8m/soc.c b/arch/arm/mach-imx/mx8m/soc.c new file mode 100644 index 0000000000..fe6c19c787 --- /dev/null +++ b/arch/arm/mach-imx/mx8m/soc.c @@ -0,0 +1,227 @@ +/* + * 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 + */ + } +}