arch/arm/cpu/armv8/fsl-layerscape/mp.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014-2015 Freescale Semiconductor, Inc.
  */

 #include <common.h>
 #include <cpu_func.h>
 #include <image.h>
 #include <log.h>
 #include <asm/cache.h>
 #include <asm/io.h>
 #include <asm/system.h>
 #include <asm/arch/mp.h>
 #include <asm/arch/soc.h>
 #include <linux/delay.h>
 #include "cpu.h"
 #include <asm/arch-fsl-layerscape/soc.h>
 #include <efi_loader.h>

 DECLARE_GLOBAL_DATA_PTR;

 void *get_spin_tbl_addr(void)
 {
 	/* the spin table is at the beginning */
 	return secondary_boot_code_start;
 }

 void update_os_arch_secondary_cores(uint8_t os_arch)
 {
 	u64 *table = get_spin_tbl_addr();
 	int i;

 	for (i = 1; i < CONFIG_MAX_CPUS; i++) {
 		if (os_arch == IH_ARCH_DEFAULT)
 			table[i * WORDS_PER_SPIN_TABLE_ENTRY +
 				SPIN_TABLE_ELEM_ARCH_COMP_IDX] = OS_ARCH_SAME;
 		else
 			table[i * WORDS_PER_SPIN_TABLE_ENTRY +
 				SPIN_TABLE_ELEM_ARCH_COMP_IDX] = OS_ARCH_DIFF;
 	}
 }

 #ifdef CONFIG_FSL_LSCH3
 static void wake_secondary_core_n(int cluster, int core, int cluster_cores)
 {
 	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
 	struct ccsr_reset __iomem *rst = (void *)(CONFIG_SYS_FSL_RST_ADDR);
 	u32 mpidr = 0;

 	mpidr = ((cluster << 8) | core);
 	/*
 	 * mpidr_el1 register value of core which needs to be released
 	 * is written to scratchrw[6] register
 	 */
 	gur_out32(&gur->scratchrw[6], mpidr);
 	asm volatile("dsb st" : : : "memory");
 	rst->brrl |= 1 << ((cluster * cluster_cores) + core);
 	asm volatile("dsb st" : : : "memory");
 	/*
 	 * scratchrw[6] register value is polled
 	 * when the value becomes zero, this means that this core is up
 	 * and running, next core can be released now
 	 */
 	while (gur_in32(&gur->scratchrw[6]) != 0)
 		;
 }
 #endif

 int fsl_layerscape_wake_seconday_cores(void)
 {
 	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
 #ifdef CONFIG_FSL_LSCH3
 	struct ccsr_reset __iomem *rst = (void *)(CONFIG_SYS_FSL_RST_ADDR);
 	u32 svr, ver, cluster, type;
 	int j = 0, cluster_cores = 0;
 #elif defined(CONFIG_FSL_LSCH2)
 	struct ccsr_scfg __iomem *scfg = (void *)(CONFIG_SYS_FSL_SCFG_ADDR);
 #endif
 	u32 cores, cpu_up_mask = 1;
 	int i, timeout = 10;
 	u64 *table;
 #ifdef CONFIG_EFI_LOADER
 	u64 reloc_addr = U32_MAX;
 	efi_status_t ret;
 #endif

 #ifdef COUNTER_FREQUENCY_REAL
 	/* update for secondary cores */
 	__real_cntfrq = COUNTER_FREQUENCY_REAL;
 	flush_dcache_range((unsigned long)&__real_cntfrq,
 			   (unsigned long)&__real_cntfrq + 8);
 #endif

 #ifdef CONFIG_EFI_LOADER
 	/*
 	 * EFI will reserve 64kb for its runtime services. This will probably
 	 * overlap with our spin table code, which is why we have to relocate
 	 * it.
 	 * Keep this after the __real_cntfrq update, so we have it when we
 	 * copy the complete section here.
 	 */
 	ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
 				 EFI_RESERVED_MEMORY_TYPE,
 				 efi_size_in_pages(secondary_boot_code_size),
 				 &reloc_addr);
 	if (ret == EFI_SUCCESS) {
 		debug("Relocating spin table from %llx to %llx (size %lx)\n",
 		      (u64)secondary_boot_code_start, reloc_addr,
 		      secondary_boot_code_size);
 		memcpy((void *)reloc_addr, secondary_boot_code_start,
 		       secondary_boot_code_size);
 		flush_dcache_range(reloc_addr,
 				   reloc_addr + secondary_boot_code_size);

 		/* set new entry point for secondary cores */
 		secondary_boot_addr += (void *)reloc_addr -
 				       secondary_boot_code_start;
 		flush_dcache_range((unsigned long)&secondary_boot_addr,
 				   (unsigned long)&secondary_boot_addr + 8);

 		/* this will be used to reserve the memory */
 		secondary_boot_code_start = (void *)reloc_addr;
 	}
 #endif

 	cores = cpu_mask();
 	/* Clear spin table so that secondary processors
 	 * observe the correct value after waking up from wfe.
 	 */
 	table = get_spin_tbl_addr();
 	memset(table, 0, CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE);
 	flush_dcache_range((unsigned long)table,
 			   (unsigned long)table +
 			   (CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE));

 	debug("Waking secondary cores to start from %lx\n", gd->relocaddr);

 #ifdef CONFIG_FSL_LSCH3
 	gur_out32(&gur->bootlocptrh, (u32)(gd->relocaddr >> 32));
 	gur_out32(&gur->bootlocptrl, (u32)gd->relocaddr);

 	svr = gur_in32(&gur->svr);
 	ver = SVR_SOC_VER(svr);
 	if (ver == SVR_LS2080A || ver == SVR_LS2085A) {
 		gur_out32(&gur->scratchrw[6], 1);
 		asm volatile("dsb st" : : : "memory");
 		rst->brrl = cores;
 		asm volatile("dsb st" : : : "memory");
 	} else {
 		/*
 		 * Release the cores out of reset one-at-a-time to avoid
 		 * power spikes
 		 */
 		i = 0;
 		cluster = in_le32(&gur->tp_cluster[i].lower);
 		for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
 			type = initiator_type(cluster, j);
 			if (type &&
 			    TP_ITYP_TYPE(type) == TP_ITYP_TYPE_ARM)
 				cluster_cores++;
 		}

 		do {
 			cluster = in_le32(&gur->tp_cluster[i].lower);
 			for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
 				type = initiator_type(cluster, j);
 				if (type &&
 				    TP_ITYP_TYPE(type) == TP_ITYP_TYPE_ARM)
 					wake_secondary_core_n(i, j,
 							      cluster_cores);
 			}
 		i++;
 		} while ((cluster & TP_CLUSTER_EOC) != TP_CLUSTER_EOC);
 	}
 #elif defined(CONFIG_FSL_LSCH2)
 	scfg_out32(&scfg->scratchrw[0], (u32)(gd->relocaddr >> 32));
 	scfg_out32(&scfg->scratchrw[1], (u32)gd->relocaddr);
 	asm volatile("dsb st" : : : "memory");
 	gur_out32(&gur->brrl, cores);
 	asm volatile("dsb st" : : : "memory");

 	/* Bootup online cores */
 	scfg_out32(&scfg->corebcr, cores);
 #endif
 	/* This is needed as a precautionary measure.
 	 * If some code before this has accidentally  released the secondary
 	 * cores then the pre-bootloader code will trap them in a "wfe" unless
 	 * the scratchrw[6] is set. In this case we need a sev here to get these
 	 * cores moving again.
 	 */
 	asm volatile("sev");

 	while (timeout--) {
 		flush_dcache_range((unsigned long)table, (unsigned long)table +
 				   CONFIG_MAX_CPUS * 64);
 		for (i = 1; i < CONFIG_MAX_CPUS; i++) {
 			if (table[i * WORDS_PER_SPIN_TABLE_ENTRY +
 					SPIN_TABLE_ELEM_STATUS_IDX])
 				cpu_up_mask |= 1 << i;
 		}
 		if (hweight32(cpu_up_mask) == hweight32(cores))
 			break;
 		udelay(10);
 	}
 	if (timeout <= 0) {
 		printf("CPU:   Failed to bring up some cores (mask 0x%x)\n",
 		       cores ^ cpu_up_mask);
 		return 1;
 	}
 	printf("CPU:   %d cores online\n", hweight32(cores));

 	return 0;
 }

 int is_core_valid(unsigned int core)
 {
 	return !!((1 << core) & cpu_mask());
 }

 static int is_pos_valid(unsigned int pos)
 {
 	return !!((1 << pos) & cpu_pos_mask());
 }

 int is_core_online(u64 cpu_id)
 {
 	u64 *table = get_spin_tbl_addr();
 	int pos = id_to_core(cpu_id);
 	table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
 	return table[SPIN_TABLE_ELEM_STATUS_IDX] == 1;
 }

 int cpu_reset(u32 nr)
 {
 	puts("Feature is not implemented.\n");

 	return 0;
 }

 int cpu_disable(u32 nr)
 {
 	puts("Feature is not implemented.\n");

 	return 0;
 }

 static int core_to_pos(int nr)
 {
 	u32 cores = cpu_pos_mask();
 	int i, count = 0;

 	if (nr == 0) {
 		return 0;
 	} else if (nr >= hweight32(cores)) {
 		puts("Not a valid core number.\n");
 		return -1;
 	}

 	for (i = 1; i < 32; i++) {
 		if (is_pos_valid(i)) {
 			count++;
 			if (count == nr)
 				break;
 		}
 	}

 	if (count != nr)
 		return -1;

 	return i;
 }

 int cpu_status(u32 nr)
 {
 	u64 *table = get_spin_tbl_addr();
 	int pos;

 	if (nr == 0) {
 		printf("table base @ 0x%p\n", table);
 	} else {
 		pos = core_to_pos(nr);
 		if (pos < 0)
 			return -1;
 		table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
 		printf("table @ 0x%p\n", table);
 		printf("   addr - 0x%016llx\n",
 		       table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX]);
 		printf("   status   - 0x%016llx\n",
 		       table[SPIN_TABLE_ELEM_STATUS_IDX]);
 		printf("   lpid  - 0x%016llx\n",
 		       table[SPIN_TABLE_ELEM_LPID_IDX]);
 	}

 	return 0;
 }

 int cpu_release(u32 nr, int argc, char *const argv[])
 {
 	u64 boot_addr;
 	u64 *table = get_spin_tbl_addr();
 	int pos;

 	pos = core_to_pos(nr);
 	if (pos <= 0)
 		return -1;

 	table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
 	boot_addr = simple_strtoull(argv[0], NULL, 16);
 	table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX] = boot_addr;
 	flush_dcache_range((unsigned long)table,
 			   (unsigned long)table + SPIN_TABLE_ELEM_SIZE);
 	asm volatile("dsb st");

 	/*
 	 * The secondary CPUs polling the spin-table above for a non-zero
 	 * value. To save power "wfe" is called. Thus call "sev" here to
 	 * wake the CPUs and let them check the spin-table again (see
 	 * slave_cpu loop in lowlevel.S)
 	 */
 	asm volatile("sev");

 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2014-2015 Freescale Semiconductor, Inc.
	*/

	#include <common.h>
	#include <cpu_func.h>
	#include <image.h>
	#include <log.h>
	#include <asm/cache.h>
	#include <asm/io.h>
	#include <asm/system.h>
	#include <asm/arch/mp.h>
	#include <asm/arch/soc.h>
	#include <linux/delay.h>
	#include "cpu.h"
	#include <asm/arch-fsl-layerscape/soc.h>
	#include <efi_loader.h>

	DECLARE_GLOBAL_DATA_PTR;

	void *get_spin_tbl_addr(void)
	{
	/* the spin table is at the beginning */
	return secondary_boot_code_start;
	}

	void update_os_arch_secondary_cores(uint8_t os_arch)
	{
	u64 *table = get_spin_tbl_addr();
	int i;

	for (i = 1; i < CONFIG_MAX_CPUS; i++) {
	if (os_arch == IH_ARCH_DEFAULT)
	table[i * WORDS_PER_SPIN_TABLE_ENTRY +
	SPIN_TABLE_ELEM_ARCH_COMP_IDX] = OS_ARCH_SAME;
	else
	table[i * WORDS_PER_SPIN_TABLE_ENTRY +
	SPIN_TABLE_ELEM_ARCH_COMP_IDX] = OS_ARCH_DIFF;
	}
	}

	#ifdef CONFIG_FSL_LSCH3
	static void wake_secondary_core_n(int cluster, int core, int cluster_cores)
	{
	struct ccsr_gur __iomem gur = (void )(CONFIG_SYS_FSL_GUTS_ADDR);
	struct ccsr_reset __iomem rst = (void )(CONFIG_SYS_FSL_RST_ADDR);
	u32 mpidr = 0;

	mpidr = ((cluster << 8) \| core);
	/*
	* mpidr_el1 register value of core which needs to be released
	* is written to scratchrw[6] register
	*/
	gur_out32(&gur->scratchrw[6], mpidr);
	asm volatile("dsb st" : : : "memory");
	rst->brrl \|= 1 << ((cluster * cluster_cores) + core);
	asm volatile("dsb st" : : : "memory");
	/*
	* scratchrw[6] register value is polled
	* when the value becomes zero, this means that this core is up
	* and running, next core can be released now
	*/
	while (gur_in32(&gur->scratchrw[6]) != 0)
	;
	}
	#endif

	int fsl_layerscape_wake_seconday_cores(void)
	{
	struct ccsr_gur __iomem gur = (void )(CONFIG_SYS_FSL_GUTS_ADDR);
	#ifdef CONFIG_FSL_LSCH3
	struct ccsr_reset __iomem rst = (void )(CONFIG_SYS_FSL_RST_ADDR);
	u32 svr, ver, cluster, type;
	int j = 0, cluster_cores = 0;
	#elif defined(CONFIG_FSL_LSCH2)
	struct ccsr_scfg __iomem scfg = (void )(CONFIG_SYS_FSL_SCFG_ADDR);
	#endif
	u32 cores, cpu_up_mask = 1;
	int i, timeout = 10;
	u64 *table;
	#ifdef CONFIG_EFI_LOADER
	u64 reloc_addr = U32_MAX;
	efi_status_t ret;
	#endif

	#ifdef COUNTER_FREQUENCY_REAL
	/* update for secondary cores */
	__real_cntfrq = COUNTER_FREQUENCY_REAL;
	flush_dcache_range((unsigned long)&__real_cntfrq,
	(unsigned long)&__real_cntfrq + 8);
	#endif

	#ifdef CONFIG_EFI_LOADER
	/*
	* EFI will reserve 64kb for its runtime services. This will probably
	* overlap with our spin table code, which is why we have to relocate
	* it.
	* Keep this after the __real_cntfrq update, so we have it when we
	* copy the complete section here.
	*/
	ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
	EFI_RESERVED_MEMORY_TYPE,
	efi_size_in_pages(secondary_boot_code_size),
	&reloc_addr);
	if (ret == EFI_SUCCESS) {
	debug("Relocating spin table from %llx to %llx (size %lx)\n",
	(u64)secondary_boot_code_start, reloc_addr,
	secondary_boot_code_size);
	memcpy((void *)reloc_addr, secondary_boot_code_start,
	secondary_boot_code_size);
	flush_dcache_range(reloc_addr,
	reloc_addr + secondary_boot_code_size);

	/* set new entry point for secondary cores */
	secondary_boot_addr += (void *)reloc_addr -
	secondary_boot_code_start;
	flush_dcache_range((unsigned long)&secondary_boot_addr,
	(unsigned long)&secondary_boot_addr + 8);

	/* this will be used to reserve the memory */
	secondary_boot_code_start = (void *)reloc_addr;
	}
	#endif

	cores = cpu_mask();
	/* Clear spin table so that secondary processors
	* observe the correct value after waking up from wfe.
	*/
	table = get_spin_tbl_addr();
	memset(table, 0, CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE);
	flush_dcache_range((unsigned long)table,
	(unsigned long)table +
	(CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE));

	debug("Waking secondary cores to start from %lx\n", gd->relocaddr);

	#ifdef CONFIG_FSL_LSCH3
	gur_out32(&gur->bootlocptrh, (u32)(gd->relocaddr >> 32));
	gur_out32(&gur->bootlocptrl, (u32)gd->relocaddr);

	svr = gur_in32(&gur->svr);
	ver = SVR_SOC_VER(svr);
	if (ver == SVR_LS2080A \|\| ver == SVR_LS2085A) {
	gur_out32(&gur->scratchrw[6], 1);
	asm volatile("dsb st" : : : "memory");
	rst->brrl = cores;
	asm volatile("dsb st" : : : "memory");
	} else {
	/*
	* Release the cores out of reset one-at-a-time to avoid
	* power spikes
	*/
	i = 0;
	cluster = in_le32(&gur->tp_cluster[i].lower);
	for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
	type = initiator_type(cluster, j);
	if (type &&
	TP_ITYP_TYPE(type) == TP_ITYP_TYPE_ARM)
	cluster_cores++;
	}

	do {
	cluster = in_le32(&gur->tp_cluster[i].lower);
	for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
	type = initiator_type(cluster, j);
	if (type &&
	TP_ITYP_TYPE(type) == TP_ITYP_TYPE_ARM)
	wake_secondary_core_n(i, j,
	cluster_cores);
	}
	i++;
	} while ((cluster & TP_CLUSTER_EOC) != TP_CLUSTER_EOC);
	}
	#elif defined(CONFIG_FSL_LSCH2)
	scfg_out32(&scfg->scratchrw[0], (u32)(gd->relocaddr >> 32));
	scfg_out32(&scfg->scratchrw[1], (u32)gd->relocaddr);
	asm volatile("dsb st" : : : "memory");
	gur_out32(&gur->brrl, cores);
	asm volatile("dsb st" : : : "memory");

	/* Bootup online cores */
	scfg_out32(&scfg->corebcr, cores);
	#endif
	/* This is needed as a precautionary measure.
	* If some code before this has accidentally released the secondary
	* cores then the pre-bootloader code will trap them in a "wfe" unless
	* the scratchrw[6] is set. In this case we need a sev here to get these
	* cores moving again.
	*/
	asm volatile("sev");

	while (timeout--) {
	flush_dcache_range((unsigned long)table, (unsigned long)table +
	CONFIG_MAX_CPUS * 64);
	for (i = 1; i < CONFIG_MAX_CPUS; i++) {
	if (table[i * WORDS_PER_SPIN_TABLE_ENTRY +
	SPIN_TABLE_ELEM_STATUS_IDX])
	cpu_up_mask \|= 1 << i;
	}
	if (hweight32(cpu_up_mask) == hweight32(cores))
	break;
	udelay(10);
	}
	if (timeout <= 0) {
	printf("CPU: Failed to bring up some cores (mask 0x%x)\n",
	cores ^ cpu_up_mask);
	return 1;
	}
	printf("CPU: %d cores online\n", hweight32(cores));

	return 0;
	}

	int is_core_valid(unsigned int core)
	{
	return !!((1 << core) & cpu_mask());
	}

	static int is_pos_valid(unsigned int pos)
	{
	return !!((1 << pos) & cpu_pos_mask());
	}

	int is_core_online(u64 cpu_id)
	{
	u64 *table = get_spin_tbl_addr();
	int pos = id_to_core(cpu_id);
	table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
	return table[SPIN_TABLE_ELEM_STATUS_IDX] == 1;
	}

	int cpu_reset(u32 nr)
	{
	puts("Feature is not implemented.\n");

	return 0;
	}

	int cpu_disable(u32 nr)
	{
	puts("Feature is not implemented.\n");

	return 0;
	}

	static int core_to_pos(int nr)
	{
	u32 cores = cpu_pos_mask();
	int i, count = 0;

	if (nr == 0) {
	return 0;
	} else if (nr >= hweight32(cores)) {
	puts("Not a valid core number.\n");
	return -1;
	}

	for (i = 1; i < 32; i++) {
	if (is_pos_valid(i)) {
	count++;
	if (count == nr)
	break;
	}
	}

	if (count != nr)
	return -1;

	return i;
	}

	int cpu_status(u32 nr)
	{
	u64 *table = get_spin_tbl_addr();
	int pos;

	if (nr == 0) {
	printf("table base @ 0x%p\n", table);
	} else {
	pos = core_to_pos(nr);
	if (pos < 0)
	return -1;
	table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
	printf("table @ 0x%p\n", table);
	printf(" addr - 0x%016llx\n",
	table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX]);
	printf(" status - 0x%016llx\n",
	table[SPIN_TABLE_ELEM_STATUS_IDX]);
	printf(" lpid - 0x%016llx\n",
	table[SPIN_TABLE_ELEM_LPID_IDX]);
	}

	return 0;
	}

	int cpu_release(u32 nr, int argc, char *const argv[])
	{
	u64 boot_addr;
	u64 *table = get_spin_tbl_addr();
	int pos;

	pos = core_to_pos(nr);
	if (pos <= 0)
	return -1;

	table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
	boot_addr = simple_strtoull(argv[0], NULL, 16);
	table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX] = boot_addr;
	flush_dcache_range((unsigned long)table,
	(unsigned long)table + SPIN_TABLE_ELEM_SIZE);
	asm volatile("dsb st");

	/*
	* The secondary CPUs polling the spin-table above for a non-zero
	* value. To save power "wfe" is called. Thus call "sev" here to
	* wake the CPUs and let them check the spin-table again (see
	* slave_cpu loop in lowlevel.S)
	*/
	asm volatile("sev");

	return 0;
	}