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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
- * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
- */
- #include <common.h>
- #include <config.h>
- #include <cpu_func.h>
- #include <env.h>
- #include <init.h>
- #include <irq_func.h>
- #include <linux/printk.h>
- #include <linux/kernel.h>
- #include <linux/io.h>
- #include <asm/arcregs.h>
- #include <fdt_support.h>
- #include <dwmmc.h>
- #include <malloc.h>
- #include <usb.h>
- #include "clk-lib.h"
- #include "env-lib.h"
- DECLARE_GLOBAL_DATA_PTR;
- #define ALL_CPU_MASK GENMASK(NR_CPUS - 1, 0)
- #define MASTER_CPU_ID 0
- #define APERTURE_SHIFT 28
- #define NO_CCM 0x10
- #define SLAVE_CPU_READY 0x12345678
- #define BOOTSTAGE_1 1 /* after SP, FP setup, before HW init */
- #define BOOTSTAGE_2 2 /* after HW init, before self halt */
- #define BOOTSTAGE_3 3 /* after self halt */
- #define BOOTSTAGE_4 4 /* before app launch */
- #define BOOTSTAGE_5 5 /* after app launch, unreachable */
- #define RESET_VECTOR_ADDR 0x0
- #define CREG_BASE (ARC_PERIPHERAL_BASE + 0x1000)
- #define CREG_CPU_START (CREG_BASE + 0x400)
- #define CREG_CPU_START_MASK 0xF
- #define SDIO_BASE (ARC_PERIPHERAL_BASE + 0xA000)
- #define SDIO_UHS_REG_EXT (SDIO_BASE + 0x108)
- #define SDIO_UHS_REG_EXT_DIV_2 (2 << 30)
- /* Uncached access macros */
- #define arc_read_uncached_32(ptr) \
- ({ \
- unsigned int __ret; \
- __asm__ __volatile__( \
- " ld.di %0, [%1] \n" \
- : "=r"(__ret) \
- : "r"(ptr)); \
- __ret; \
- })
- #define arc_write_uncached_32(ptr, data)\
- ({ \
- __asm__ __volatile__( \
- " st.di %0, [%1] \n" \
- : \
- : "r"(data), "r"(ptr)); \
- })
- struct hsdk_env_core_ctl {
- u32_env entry[NR_CPUS];
- u32_env iccm[NR_CPUS];
- u32_env dccm[NR_CPUS];
- };
- struct hsdk_env_common_ctl {
- bool halt_on_boot;
- u32_env core_mask;
- u32_env cpu_freq;
- u32_env axi_freq;
- u32_env tun_freq;
- u32_env nvlim;
- u32_env icache;
- u32_env dcache;
- };
- /*
- * Uncached cross-cpu structure. All CPUs must access to this structure fields
- * only with arc_read_uncached_32() / arc_write_uncached_32() accessors (which
- * implement ld.di / st.di instructions). Simultaneous cached and uncached
- * access to this area will lead to data loss.
- * We flush all data caches in board_early_init_r() as we don't want to have
- * any dirty line in L1d$ or SL$ in this area.
- */
- struct hsdk_cross_cpu {
- /* slave CPU ready flag */
- u32 ready_flag;
- /* address of the area, which can be used for stack by slave CPU */
- u32 stack_ptr;
- /* slave CPU status - bootstage number */
- s32 status[NR_CPUS];
- /*
- * Slave CPU data - it is copy of corresponding fields in
- * hsdk_env_core_ctl and hsdk_env_common_ctl structures which are
- * required for slave CPUs initialization.
- * This fields can be populated by copying from hsdk_env_core_ctl
- * and hsdk_env_common_ctl structures with sync_cross_cpu_data()
- * function.
- */
- u32 entry[NR_CPUS];
- u32 iccm[NR_CPUS];
- u32 dccm[NR_CPUS];
- u32 core_mask;
- u32 icache;
- u32 dcache;
- u8 cache_padding[ARCH_DMA_MINALIGN];
- } __aligned(ARCH_DMA_MINALIGN);
- /* Place for slave CPUs temporary stack */
- static u32 slave_stack[256 * NR_CPUS] __aligned(ARCH_DMA_MINALIGN);
- static struct hsdk_env_common_ctl env_common = {};
- static struct hsdk_env_core_ctl env_core = {};
- static struct hsdk_cross_cpu cross_cpu_data;
- static const struct env_map_common env_map_common[] = {
- { "core_mask", ENV_HEX, true, 0x1, 0xF, &env_common.core_mask },
- { "non_volatile_limit", ENV_HEX, true, 0, 0xF, &env_common.nvlim },
- { "icache_ena", ENV_HEX, true, 0, 1, &env_common.icache },
- { "dcache_ena", ENV_HEX, true, 0, 1, &env_common.dcache },
- {}
- };
- static const struct env_map_common env_map_clock[] = {
- { "cpu_freq", ENV_DEC, false, 100, 1000, &env_common.cpu_freq },
- { "axi_freq", ENV_DEC, false, 200, 800, &env_common.axi_freq },
- { "tun_freq", ENV_DEC, false, 0, 150, &env_common.tun_freq },
- {}
- };
- static const struct env_map_percpu env_map_core[] = {
- { "core_iccm", ENV_HEX, true, {NO_CCM, 0, NO_CCM, 0}, {NO_CCM, 0xF, NO_CCM, 0xF}, &env_core.iccm },
- { "core_dccm", ENV_HEX, true, {NO_CCM, 0, NO_CCM, 0}, {NO_CCM, 0xF, NO_CCM, 0xF}, &env_core.dccm },
- {}
- };
- static const struct env_map_common env_map_mask[] = {
- { "core_mask", ENV_HEX, false, 0x1, 0xF, &env_common.core_mask },
- {}
- };
- static const struct env_map_percpu env_map_go[] = {
- { "core_entry", ENV_HEX, true, {0, 0, 0, 0}, {U32_MAX, U32_MAX, U32_MAX, U32_MAX}, &env_core.entry },
- {}
- };
- static void sync_cross_cpu_data(void)
- {
- u32 value;
- for (u32 i = 0; i < NR_CPUS; i++) {
- value = env_core.entry[i].val;
- arc_write_uncached_32(&cross_cpu_data.entry[i], value);
- }
- for (u32 i = 0; i < NR_CPUS; i++) {
- value = env_core.iccm[i].val;
- arc_write_uncached_32(&cross_cpu_data.iccm[i], value);
- }
- for (u32 i = 0; i < NR_CPUS; i++) {
- value = env_core.dccm[i].val;
- arc_write_uncached_32(&cross_cpu_data.dccm[i], value);
- }
- value = env_common.core_mask.val;
- arc_write_uncached_32(&cross_cpu_data.core_mask, value);
- value = env_common.icache.val;
- arc_write_uncached_32(&cross_cpu_data.icache, value);
- value = env_common.dcache.val;
- arc_write_uncached_32(&cross_cpu_data.dcache, value);
- }
- /* Can be used only on master CPU */
- static bool is_cpu_used(u32 cpu_id)
- {
- return !!(env_common.core_mask.val & BIT(cpu_id));
- }
- /* TODO: add ICCM BCR and DCCM BCR runtime check */
- static void init_slave_cpu_func(u32 core)
- {
- u32 val;
- /* Remap ICCM to another memory region if it exists */
- val = arc_read_uncached_32(&cross_cpu_data.iccm[core]);
- if (val != NO_CCM)
- write_aux_reg(ARC_AUX_ICCM_BASE, val << APERTURE_SHIFT);
- /* Remap DCCM to another memory region if it exists */
- val = arc_read_uncached_32(&cross_cpu_data.dccm[core]);
- if (val != NO_CCM)
- write_aux_reg(ARC_AUX_DCCM_BASE, val << APERTURE_SHIFT);
- if (arc_read_uncached_32(&cross_cpu_data.icache))
- icache_enable();
- else
- icache_disable();
- if (arc_read_uncached_32(&cross_cpu_data.dcache))
- dcache_enable();
- else
- dcache_disable();
- }
- static void init_cluster_nvlim(void)
- {
- u32 val = env_common.nvlim.val << APERTURE_SHIFT;
- flush_dcache_all();
- write_aux_reg(ARC_AUX_NON_VOLATILE_LIMIT, val);
- write_aux_reg(AUX_AUX_CACHE_LIMIT, val);
- flush_n_invalidate_dcache_all();
- }
- static void init_master_icache(void)
- {
- if (icache_status()) {
- /* I$ is enabled - we need to disable it */
- if (!env_common.icache.val)
- icache_disable();
- } else {
- /* I$ is disabled - we need to enable it */
- if (env_common.icache.val) {
- icache_enable();
- /* invalidate I$ right after enable */
- invalidate_icache_all();
- }
- }
- }
- static void init_master_dcache(void)
- {
- if (dcache_status()) {
- /* D$ is enabled - we need to disable it */
- if (!env_common.dcache.val)
- dcache_disable();
- } else {
- /* D$ is disabled - we need to enable it */
- if (env_common.dcache.val)
- dcache_enable();
- /* TODO: probably we need ti invalidate D$ right after enable */
- }
- }
- static int cleanup_before_go(void)
- {
- disable_interrupts();
- sync_n_cleanup_cache_all();
- return 0;
- }
- void slave_cpu_set_boot_addr(u32 addr)
- {
- /* All cores have reset vector pointing to 0 */
- writel(addr, (void __iomem *)RESET_VECTOR_ADDR);
- /* Make sure other cores see written value in memory */
- sync_n_cleanup_cache_all();
- }
- static inline void halt_this_cpu(void)
- {
- __builtin_arc_flag(1);
- }
- static void smp_kick_cpu_x(u32 cpu_id)
- {
- int cmd = readl((void __iomem *)CREG_CPU_START);
- if (cpu_id > NR_CPUS)
- return;
- cmd &= ~CREG_CPU_START_MASK;
- cmd |= (1 << cpu_id);
- writel(cmd, (void __iomem *)CREG_CPU_START);
- }
- static u32 prepare_cpu_ctart_reg(void)
- {
- int cmd = readl((void __iomem *)CREG_CPU_START);
- cmd &= ~CREG_CPU_START_MASK;
- return cmd | env_common.core_mask.val;
- }
- /* slave CPU entry for configuration */
- __attribute__((naked, noreturn, flatten)) noinline void hsdk_core_init_f(void)
- {
- __asm__ __volatile__(
- "ld.di r8, [%0]\n"
- "mov %%sp, r8\n"
- "mov %%fp, %%sp\n"
- : /* no output */
- : "r" (&cross_cpu_data.stack_ptr));
- invalidate_icache_all();
- arc_write_uncached_32(&cross_cpu_data.status[CPU_ID_GET()], BOOTSTAGE_1);
- init_slave_cpu_func(CPU_ID_GET());
- arc_write_uncached_32(&cross_cpu_data.ready_flag, SLAVE_CPU_READY);
- arc_write_uncached_32(&cross_cpu_data.status[CPU_ID_GET()], BOOTSTAGE_2);
- /* Halt the processor until the master kick us again */
- halt_this_cpu();
- /*
- * 3 NOPs after FLAG 1 instruction are no longer required for ARCv2
- * cores but we leave them for gebug purposes.
- */
- __builtin_arc_nop();
- __builtin_arc_nop();
- __builtin_arc_nop();
- arc_write_uncached_32(&cross_cpu_data.status[CPU_ID_GET()], BOOTSTAGE_3);
- /* get the updated entry - invalidate i$ */
- invalidate_icache_all();
- arc_write_uncached_32(&cross_cpu_data.status[CPU_ID_GET()], BOOTSTAGE_4);
- /* Run our program */
- ((void (*)(void))(arc_read_uncached_32(&cross_cpu_data.entry[CPU_ID_GET()])))();
- /* This bootstage is unreachable as we don't return from app we launch */
- arc_write_uncached_32(&cross_cpu_data.status[CPU_ID_GET()], BOOTSTAGE_5);
- /* Something went terribly wrong */
- while (true)
- halt_this_cpu();
- }
- static void clear_cross_cpu_data(void)
- {
- arc_write_uncached_32(&cross_cpu_data.ready_flag, 0);
- arc_write_uncached_32(&cross_cpu_data.stack_ptr, 0);
- for (u32 i = 0; i < NR_CPUS; i++)
- arc_write_uncached_32(&cross_cpu_data.status[i], 0);
- }
- static noinline void do_init_slave_cpu(u32 cpu_id)
- {
- /* attempts number for check clave CPU ready_flag */
- u32 attempts = 100;
- u32 stack_ptr = (u32)(slave_stack + (64 * cpu_id));
- if (cpu_id >= NR_CPUS)
- return;
- arc_write_uncached_32(&cross_cpu_data.ready_flag, 0);
- /* Use global unique place for each slave cpu stack */
- arc_write_uncached_32(&cross_cpu_data.stack_ptr, stack_ptr);
- debug("CPU %u: stack pool base: %p\n", cpu_id, slave_stack);
- debug("CPU %u: current slave stack base: %x\n", cpu_id, stack_ptr);
- slave_cpu_set_boot_addr((u32)hsdk_core_init_f);
- smp_kick_cpu_x(cpu_id);
- debug("CPU %u: cross-cpu flag: %x [before timeout]\n", cpu_id,
- arc_read_uncached_32(&cross_cpu_data.ready_flag));
- while (!arc_read_uncached_32(&cross_cpu_data.ready_flag) && attempts--)
- mdelay(10);
- /* Just to be sure that slave cpu is halted after it set ready_flag */
- mdelay(20);
- /*
- * Only print error here if we reach timeout as there is no option to
- * halt slave cpu (or check that slave cpu is halted)
- */
- if (!attempts)
- pr_err("CPU %u is not responding after init!\n", cpu_id);
- /* Check current stage of slave cpu */
- if (arc_read_uncached_32(&cross_cpu_data.status[cpu_id]) != BOOTSTAGE_2)
- pr_err("CPU %u status is unexpected: %d\n", cpu_id,
- arc_read_uncached_32(&cross_cpu_data.status[cpu_id]));
- debug("CPU %u: cross-cpu flag: %x [after timeout]\n", cpu_id,
- arc_read_uncached_32(&cross_cpu_data.ready_flag));
- debug("CPU %u: status: %d [after timeout]\n", cpu_id,
- arc_read_uncached_32(&cross_cpu_data.status[cpu_id]));
- }
- static void do_init_slave_cpus(void)
- {
- clear_cross_cpu_data();
- sync_cross_cpu_data();
- debug("cross_cpu_data location: %#x\n", (u32)&cross_cpu_data);
- for (u32 i = MASTER_CPU_ID + 1; i < NR_CPUS; i++)
- if (is_cpu_used(i))
- do_init_slave_cpu(i);
- }
- static void do_init_master_cpu(void)
- {
- /*
- * Setup master caches even if master isn't used as we want to use
- * same cache configuration on all running CPUs
- */
- init_master_icache();
- init_master_dcache();
- }
- enum hsdk_axi_masters {
- M_HS_CORE = 0,
- M_HS_RTT,
- M_AXI_TUN,
- M_HDMI_VIDEO,
- M_HDMI_AUDIO,
- M_USB_HOST,
- M_ETHERNET,
- M_SDIO,
- M_GPU,
- M_DMAC_0,
- M_DMAC_1,
- M_DVFS
- };
- #define UPDATE_VAL 1
- /*
- * m master AXI_M_m_SLV0 AXI_M_m_SLV1 AXI_M_m_OFFSET0 AXI_M_m_OFFSET1
- * 0 HS (CBU) 0x11111111 0x63111111 0xFEDCBA98 0x0E543210
- * 1 HS (RTT) 0x77777777 0x77777777 0xFEDCBA98 0x76543210
- * 2 AXI Tunnel 0x88888888 0x88888888 0xFEDCBA98 0x76543210
- * 3 HDMI-VIDEO 0x77777777 0x77777777 0xFEDCBA98 0x76543210
- * 4 HDMI-ADUIO 0x77777777 0x77777777 0xFEDCBA98 0x76543210
- * 5 USB-HOST 0x77777777 0x77999999 0xFEDCBA98 0x76DCBA98
- * 6 ETHERNET 0x77777777 0x77999999 0xFEDCBA98 0x76DCBA98
- * 7 SDIO 0x77777777 0x77999999 0xFEDCBA98 0x76DCBA98
- * 8 GPU 0x77777777 0x77777777 0xFEDCBA98 0x76543210
- * 9 DMAC (port #1) 0x77777777 0x77777777 0xFEDCBA98 0x76543210
- * 10 DMAC (port #2) 0x77777777 0x77777777 0xFEDCBA98 0x76543210
- * 11 DVFS 0x00000000 0x60000000 0x00000000 0x00000000
- *
- * Please read ARC HS Development IC Specification, section 17.2 for more
- * information about apertures configuration.
- * NOTE: we intentionally modify default settings in U-boot. Default settings
- * are specified in "Table 111 CREG Address Decoder register reset values".
- */
- #define CREG_AXI_M_SLV0(m) ((void __iomem *)(CREG_BASE + 0x020 * (m)))
- #define CREG_AXI_M_SLV1(m) ((void __iomem *)(CREG_BASE + 0x020 * (m) + 0x004))
- #define CREG_AXI_M_OFT0(m) ((void __iomem *)(CREG_BASE + 0x020 * (m) + 0x008))
- #define CREG_AXI_M_OFT1(m) ((void __iomem *)(CREG_BASE + 0x020 * (m) + 0x00C))
- #define CREG_AXI_M_UPDT(m) ((void __iomem *)(CREG_BASE + 0x020 * (m) + 0x014))
- #define CREG_AXI_M_HS_CORE_BOOT ((void __iomem *)(CREG_BASE + 0x010))
- #define CREG_PAE ((void __iomem *)(CREG_BASE + 0x180))
- #define CREG_PAE_UPDT ((void __iomem *)(CREG_BASE + 0x194))
- void init_memory_bridge(void)
- {
- u32 reg;
- /*
- * M_HS_CORE has one unic register - BOOT.
- * We need to clean boot mirror (BOOT[1:0]) bits in them.
- */
- reg = readl(CREG_AXI_M_HS_CORE_BOOT) & (~0x3);
- writel(reg, CREG_AXI_M_HS_CORE_BOOT);
- writel(0x11111111, CREG_AXI_M_SLV0(M_HS_CORE));
- writel(0x63111111, CREG_AXI_M_SLV1(M_HS_CORE));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HS_CORE));
- writel(0x0E543210, CREG_AXI_M_OFT1(M_HS_CORE));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HS_CORE));
- writel(0x77777777, CREG_AXI_M_SLV0(M_HS_RTT));
- writel(0x77777777, CREG_AXI_M_SLV1(M_HS_RTT));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HS_RTT));
- writel(0x76543210, CREG_AXI_M_OFT1(M_HS_RTT));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HS_RTT));
- writel(0x88888888, CREG_AXI_M_SLV0(M_AXI_TUN));
- writel(0x88888888, CREG_AXI_M_SLV1(M_AXI_TUN));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_AXI_TUN));
- writel(0x76543210, CREG_AXI_M_OFT1(M_AXI_TUN));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_AXI_TUN));
- writel(0x77777777, CREG_AXI_M_SLV0(M_HDMI_VIDEO));
- writel(0x77777777, CREG_AXI_M_SLV1(M_HDMI_VIDEO));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HDMI_VIDEO));
- writel(0x76543210, CREG_AXI_M_OFT1(M_HDMI_VIDEO));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HDMI_VIDEO));
- writel(0x77777777, CREG_AXI_M_SLV0(M_HDMI_AUDIO));
- writel(0x77777777, CREG_AXI_M_SLV1(M_HDMI_AUDIO));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_HDMI_AUDIO));
- writel(0x76543210, CREG_AXI_M_OFT1(M_HDMI_AUDIO));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_HDMI_AUDIO));
- writel(0x77777777, CREG_AXI_M_SLV0(M_USB_HOST));
- writel(0x77999999, CREG_AXI_M_SLV1(M_USB_HOST));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_USB_HOST));
- writel(0x76DCBA98, CREG_AXI_M_OFT1(M_USB_HOST));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_USB_HOST));
- writel(0x77777777, CREG_AXI_M_SLV0(M_ETHERNET));
- writel(0x77999999, CREG_AXI_M_SLV1(M_ETHERNET));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_ETHERNET));
- writel(0x76DCBA98, CREG_AXI_M_OFT1(M_ETHERNET));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_ETHERNET));
- writel(0x77777777, CREG_AXI_M_SLV0(M_SDIO));
- writel(0x77999999, CREG_AXI_M_SLV1(M_SDIO));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_SDIO));
- writel(0x76DCBA98, CREG_AXI_M_OFT1(M_SDIO));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_SDIO));
- writel(0x77777777, CREG_AXI_M_SLV0(M_GPU));
- writel(0x77777777, CREG_AXI_M_SLV1(M_GPU));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_GPU));
- writel(0x76543210, CREG_AXI_M_OFT1(M_GPU));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_GPU));
- writel(0x77777777, CREG_AXI_M_SLV0(M_DMAC_0));
- writel(0x77777777, CREG_AXI_M_SLV1(M_DMAC_0));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_DMAC_0));
- writel(0x76543210, CREG_AXI_M_OFT1(M_DMAC_0));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_DMAC_0));
- writel(0x77777777, CREG_AXI_M_SLV0(M_DMAC_1));
- writel(0x77777777, CREG_AXI_M_SLV1(M_DMAC_1));
- writel(0xFEDCBA98, CREG_AXI_M_OFT0(M_DMAC_1));
- writel(0x76543210, CREG_AXI_M_OFT1(M_DMAC_1));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_DMAC_1));
- writel(0x00000000, CREG_AXI_M_SLV0(M_DVFS));
- writel(0x60000000, CREG_AXI_M_SLV1(M_DVFS));
- writel(0x00000000, CREG_AXI_M_OFT0(M_DVFS));
- writel(0x00000000, CREG_AXI_M_OFT1(M_DVFS));
- writel(UPDATE_VAL, CREG_AXI_M_UPDT(M_DVFS));
- writel(0x00000000, CREG_PAE);
- writel(UPDATE_VAL, CREG_PAE_UPDT);
- }
- static void setup_clocks(void)
- {
- ulong rate;
- /* Setup CPU clock */
- if (env_common.cpu_freq.set) {
- rate = env_common.cpu_freq.val;
- soc_clk_ctl("cpu-clk", &rate, CLK_ON | CLK_SET | CLK_MHZ);
- }
- /* Setup TUN clock */
- if (env_common.tun_freq.set) {
- rate = env_common.tun_freq.val;
- if (rate)
- soc_clk_ctl("tun-clk", &rate, CLK_ON | CLK_SET | CLK_MHZ);
- else
- soc_clk_ctl("tun-clk", NULL, CLK_OFF);
- }
- if (env_common.axi_freq.set) {
- rate = env_common.axi_freq.val;
- soc_clk_ctl("axi-clk", &rate, CLK_SET | CLK_ON | CLK_MHZ);
- }
- }
- static void do_init_cluster(void)
- {
- /*
- * A multi-core ARC HS configuration always includes only one
- * ARC_AUX_NON_VOLATILE_LIMIT register, which is shared by all the
- * cores.
- */
- init_cluster_nvlim();
- }
- static int check_master_cpu_id(void)
- {
- if (CPU_ID_GET() == MASTER_CPU_ID)
- return 0;
- pr_err("u-boot runs on non-master cpu with id: %lu\n", CPU_ID_GET());
- return -ENOENT;
- }
- static noinline int prepare_cpus(void)
- {
- int ret;
- ret = check_master_cpu_id();
- if (ret)
- return ret;
- ret = envs_process_and_validate(env_map_common, env_map_core, is_cpu_used);
- if (ret)
- return ret;
- printf("CPU start mask is %#x\n", env_common.core_mask.val);
- do_init_slave_cpus();
- do_init_master_cpu();
- do_init_cluster();
- return 0;
- }
- static int hsdk_go_run(u32 cpu_start_reg)
- {
- /* Cleanup caches, disable interrupts */
- cleanup_before_go();
- if (env_common.halt_on_boot)
- halt_this_cpu();
- /*
- * 3 NOPs after FLAG 1 instruction are no longer required for ARCv2
- * cores but we leave them for gebug purposes.
- */
- __builtin_arc_nop();
- __builtin_arc_nop();
- __builtin_arc_nop();
- /* Kick chosen slave CPUs */
- writel(cpu_start_reg, (void __iomem *)CREG_CPU_START);
- if (is_cpu_used(MASTER_CPU_ID))
- ((void (*)(void))(env_core.entry[MASTER_CPU_ID].val))();
- else
- halt_this_cpu();
- pr_err("u-boot still runs on cpu [%ld]\n", CPU_ID_GET());
- /*
- * We will never return after executing our program if master cpu used
- * otherwise halt master cpu manually.
- */
- while (true)
- halt_this_cpu();
- return 0;
- }
- int board_prep_linux(bootm_headers_t *images)
- {
- int ret, ofst;
- char mask[15];
- ret = envs_read_validate_common(env_map_mask);
- if (ret)
- return ret;
- /* Rollback to default values */
- if (!env_common.core_mask.set) {
- env_common.core_mask.val = ALL_CPU_MASK;
- env_common.core_mask.set = true;
- }
- printf("CPU start mask is %#x\n", env_common.core_mask.val);
- if (!is_cpu_used(MASTER_CPU_ID))
- pr_err("ERR: try to launch linux with CPU[0] disabled! It doesn't work for ARC.\n");
- /*
- * If we want to launch linux on all CPUs we don't need to patch
- * linux DTB as it is default configuration
- */
- if (env_common.core_mask.val == ALL_CPU_MASK)
- return 0;
- if (!IMAGE_ENABLE_OF_LIBFDT || !images->ft_len) {
- pr_err("WARN: core_mask setup will work properly only with external DTB!\n");
- return 0;
- }
- /* patch '/possible-cpus' property according to cpu mask */
- ofst = fdt_path_offset(images->ft_addr, "/");
- sprintf(mask, "%s%s%s%s",
- is_cpu_used(0) ? "0," : "",
- is_cpu_used(1) ? "1," : "",
- is_cpu_used(2) ? "2," : "",
- is_cpu_used(3) ? "3," : "");
- ret = fdt_setprop_string(images->ft_addr, ofst, "possible-cpus", mask);
- /*
- * If we failed to patch '/possible-cpus' property we don't need break
- * linux loading process: kernel will handle it but linux will print
- * warning like "Timeout: CPU1 FAILED to comeup !!!".
- * So warn here about error, but return 0 like no error had occurred.
- */
- if (ret)
- pr_err("WARN: failed to patch '/possible-cpus' property, ret=%d\n",
- ret);
- return 0;
- }
- void board_jump_and_run(ulong entry, int zero, int arch, uint params)
- {
- void (*kernel_entry)(int zero, int arch, uint params);
- u32 cpu_start_reg;
- kernel_entry = (void (*)(int, int, uint))entry;
- /* Prepare CREG_CPU_START for kicking chosen CPUs */
- cpu_start_reg = prepare_cpu_ctart_reg();
- /* In case of run without hsdk_init */
- slave_cpu_set_boot_addr(entry);
- /* In case of run with hsdk_init */
- for (u32 i = 0; i < NR_CPUS; i++) {
- env_core.entry[i].val = entry;
- env_core.entry[i].set = true;
- }
- /* sync cross_cpu struct as we updated core-entry variables */
- sync_cross_cpu_data();
- /* Kick chosen slave CPUs */
- writel(cpu_start_reg, (void __iomem *)CREG_CPU_START);
- if (is_cpu_used(0))
- kernel_entry(zero, arch, params);
- }
- static int hsdk_go_prepare_and_run(void)
- {
- /* Prepare CREG_CPU_START for kicking chosen CPUs */
- u32 reg = prepare_cpu_ctart_reg();
- if (env_common.halt_on_boot)
- printf("CPU will halt before application start, start application with debugger.\n");
- return hsdk_go_run(reg);
- }
- static int do_hsdk_go(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
- {
- int ret;
- /*
- * Check for 'halt' parameter. 'halt' = enter halt-mode just before
- * starting the application; can be used for debug.
- */
- if (argc > 1) {
- env_common.halt_on_boot = !strcmp(argv[1], "halt");
- if (!env_common.halt_on_boot) {
- pr_err("Unrecognised parameter: \'%s\'\n", argv[1]);
- return CMD_RET_FAILURE;
- }
- }
- ret = check_master_cpu_id();
- if (ret)
- return ret;
- ret = envs_process_and_validate(env_map_mask, env_map_go, is_cpu_used);
- if (ret)
- return ret;
- /* sync cross_cpu struct as we updated core-entry variables */
- sync_cross_cpu_data();
- ret = hsdk_go_prepare_and_run();
- return ret ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
- }
- U_BOOT_CMD(
- hsdk_go, 3, 0, do_hsdk_go,
- "Synopsys HSDK specific command",
- " - Boot stand-alone application on HSDK\n"
- "hsdk_go halt - Boot stand-alone application on HSDK, halt CPU just before application run\n"
- );
- static int do_hsdk_init(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
- {
- static bool done = false;
- int ret;
- /* hsdk_init can be run only once */
- if (done) {
- printf("HSDK HW is already initialized! Please reset the board if you want to change the configuration.\n");
- return CMD_RET_FAILURE;
- }
- ret = prepare_cpus();
- if (!ret)
- done = true;
- return ret ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
- }
- U_BOOT_CMD(
- hsdk_init, 1, 0, do_hsdk_init,
- "Synopsys HSDK specific command",
- "- Init HSDK HW\n"
- );
- static int do_hsdk_clock_set(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[])
- {
- int ret = 0;
- /* Strip off leading subcommand argument */
- argc--;
- argv++;
- envs_cleanup_common(env_map_clock);
- if (!argc) {
- printf("Set clocks to values specified in environment\n");
- ret = envs_read_common(env_map_clock);
- } else {
- printf("Set clocks to values specified in args\n");
- ret = args_envs_enumerate(env_map_clock, 2, argc, argv);
- }
- if (ret)
- return CMD_RET_FAILURE;
- ret = envs_validate_common(env_map_clock);
- if (ret)
- return CMD_RET_FAILURE;
- /* Setup clock tree HW */
- setup_clocks();
- return CMD_RET_SUCCESS;
- }
- static int do_hsdk_clock_get(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[])
- {
- ulong rate;
- if (soc_clk_ctl("cpu-clk", &rate, CLK_GET | CLK_MHZ))
- return CMD_RET_FAILURE;
- if (env_set_ulong("cpu_freq", rate))
- return CMD_RET_FAILURE;
- if (soc_clk_ctl("tun-clk", &rate, CLK_GET | CLK_MHZ))
- return CMD_RET_FAILURE;
- if (env_set_ulong("tun_freq", rate))
- return CMD_RET_FAILURE;
- if (soc_clk_ctl("axi-clk", &rate, CLK_GET | CLK_MHZ))
- return CMD_RET_FAILURE;
- if (env_set_ulong("axi_freq", rate))
- return CMD_RET_FAILURE;
- printf("Clock values are saved to environment\n");
- return CMD_RET_SUCCESS;
- }
- static int do_hsdk_clock_print(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[])
- {
- /* Main clocks */
- soc_clk_ctl("cpu-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("tun-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("axi-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("ddr-clk", NULL, CLK_PRINT | CLK_MHZ);
- return CMD_RET_SUCCESS;
- }
- static int do_hsdk_clock_print_all(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[])
- {
- /*
- * NOTE: as of today we don't use some peripherals like HDMI / EBI
- * so we don't want to print their clocks ("hdmi-sys-clk", "hdmi-pll",
- * "hdmi-clk", "ebi-clk"). Nevertheless their clock subsystems is fully
- * functional and we can print their clocks if it is required
- */
- /* CPU clock domain */
- soc_clk_ctl("cpu-pll", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("cpu-clk", NULL, CLK_PRINT | CLK_MHZ);
- printf("\n");
- /* SYS clock domain */
- soc_clk_ctl("sys-pll", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("apb-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("axi-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("eth-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("usb-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("sdio-clk", NULL, CLK_PRINT | CLK_MHZ);
- /* soc_clk_ctl("hdmi-sys-clk", NULL, CLK_PRINT | CLK_MHZ); */
- soc_clk_ctl("gfx-core-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("gfx-dma-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("gfx-cfg-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("dmac-core-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("dmac-cfg-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("sdio-ref-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("spi-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("i2c-clk", NULL, CLK_PRINT | CLK_MHZ);
- /* soc_clk_ctl("ebi-clk", NULL, CLK_PRINT | CLK_MHZ); */
- soc_clk_ctl("uart-clk", NULL, CLK_PRINT | CLK_MHZ);
- printf("\n");
- /* DDR clock domain */
- soc_clk_ctl("ddr-clk", NULL, CLK_PRINT | CLK_MHZ);
- printf("\n");
- /* HDMI clock domain */
- /* soc_clk_ctl("hdmi-pll", NULL, CLK_PRINT | CLK_MHZ); */
- /* soc_clk_ctl("hdmi-clk", NULL, CLK_PRINT | CLK_MHZ); */
- /* printf("\n"); */
- /* TUN clock domain */
- soc_clk_ctl("tun-pll", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("tun-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("rom-clk", NULL, CLK_PRINT | CLK_MHZ);
- soc_clk_ctl("pwm-clk", NULL, CLK_PRINT | CLK_MHZ);
- printf("\n");
- return CMD_RET_SUCCESS;
- }
- cmd_tbl_t cmd_hsdk_clock[] = {
- U_BOOT_CMD_MKENT(set, 3, 0, do_hsdk_clock_set, "", ""),
- U_BOOT_CMD_MKENT(get, 3, 0, do_hsdk_clock_get, "", ""),
- U_BOOT_CMD_MKENT(print, 4, 0, do_hsdk_clock_print, "", ""),
- U_BOOT_CMD_MKENT(print_all, 4, 0, do_hsdk_clock_print_all, "", ""),
- };
- static int do_hsdk_clock(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
- {
- cmd_tbl_t *c;
- if (argc < 2)
- return CMD_RET_USAGE;
- /* Strip off leading 'hsdk_clock' command argument */
- argc--;
- argv++;
- c = find_cmd_tbl(argv[0], cmd_hsdk_clock, ARRAY_SIZE(cmd_hsdk_clock));
- if (!c)
- return CMD_RET_USAGE;
- return c->cmd(cmdtp, flag, argc, argv);
- }
- U_BOOT_CMD(
- hsdk_clock, CONFIG_SYS_MAXARGS, 0, do_hsdk_clock,
- "Synopsys HSDK specific clock command",
- "set - Set clock to values specified in environment / command line arguments\n"
- "hsdk_clock get - Save clock values to environment\n"
- "hsdk_clock print - Print main clock values to console\n"
- "hsdk_clock print_all - Print all clock values to console\n"
- );
- /* init calls */
- int board_early_init_f(void)
- {
- /*
- * Setup AXI apertures unconditionally as we want to have DDR
- * in 0x00000000 region when we are kicking slave cpus.
- */
- init_memory_bridge();
- /*
- * Switch SDIO external ciu clock divider from default div-by-8 to
- * minimum possible div-by-2.
- */
- writel(SDIO_UHS_REG_EXT_DIV_2, (void __iomem *)SDIO_UHS_REG_EXT);
- return 0;
- }
- int board_early_init_r(void)
- {
- /*
- * TODO: Init USB here to be able read environment from USB MSD.
- * It can be done with usb_init() call. We can't do it right now
- * due to brocken USB IP SW reset and lack of USB IP HW reset in
- * linux kernel (if we init USB here we will break USB in linux)
- */
- /*
- * Flush all d$ as we want to use uncached area with st.di / ld.di
- * instructions and we don't want to have any dirty line in L1d$ or SL$
- * in this area. It is enough to flush all d$ once here as we access to
- * uncached area with regular st (non .di) instruction only when we copy
- * data during u-boot relocation.
- */
- flush_dcache_all();
- printf("Relocation Offset is: %08lx\n", gd->reloc_off);
- return 0;
- }
- int board_late_init(void)
- {
- /*
- * Populate environment with clock frequency values -
- * run hsdk_clock get callback without uboot command run.
- */
- do_hsdk_clock_get(NULL, 0, 0, NULL);
- return 0;
- }
- int checkboard(void)
- {
- puts("Board: Synopsys ARC HS Development Kit\n");
- return 0;
- };
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