arch/mips/loongson64/env.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Based on Ocelot Linux port, which is
  * Copyright 2001 MontaVista Software Inc.
  * Author: jsun@mvista.com or jsun@junsun.net
  *
  * Copyright 2003 ICT CAS
  * Author: Michael Guo <guoyi@ict.ac.cn>
  *
  * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
  * Author: Fuxin Zhang, zhangfx@lemote.com
  *
  * Copyright (C) 2009 Lemote Inc.
  * Author: Wu Zhangjin, wuzhangjin@gmail.com
  */
 #include <linux/export.h>
 #include <linux/pci_ids.h>
 #include <asm/bootinfo.h>
 #include <loongson.h>
 #include <boot_param.h>
 #include <builtin_dtbs.h>
 #include <workarounds.h>

 #define HOST_BRIDGE_CONFIG_ADDR	((void __iomem *)TO_UNCAC(0x1a000000))

 u32 cpu_clock_freq;
 EXPORT_SYMBOL(cpu_clock_freq);
 struct efi_memory_map_loongson *loongson_memmap;
 struct loongson_system_configuration loongson_sysconf;

 u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180};
 u64 loongson_chiptemp[MAX_PACKAGES];
 u64 loongson_freqctrl[MAX_PACKAGES];

 unsigned long long smp_group[4];

 const char *get_system_type(void)
 {
 	return "Generic Loongson64 System";
 }

 void __init prom_init_env(void)
 {
 	struct boot_params *boot_p;
 	struct loongson_params *loongson_p;
 	struct system_loongson *esys;
 	struct efi_cpuinfo_loongson *ecpu;
 	struct irq_source_routing_table *eirq_source;
 	u32 id;
 	u16 vendor, device;

 	/* firmware arguments are initialized in head.S */
 	boot_p = (struct boot_params *)fw_arg2;
 	loongson_p = &(boot_p->efi.smbios.lp);

 	esys = (struct system_loongson *)
 		((u64)loongson_p + loongson_p->system_offset);
 	ecpu = (struct efi_cpuinfo_loongson *)
 		((u64)loongson_p + loongson_p->cpu_offset);
 	eirq_source = (struct irq_source_routing_table *)
 		((u64)loongson_p + loongson_p->irq_offset);
 	loongson_memmap = (struct efi_memory_map_loongson *)
 		((u64)loongson_p + loongson_p->memory_offset);

 	cpu_clock_freq = ecpu->cpu_clock_freq;
 	loongson_sysconf.cputype = ecpu->cputype;
 	switch (ecpu->cputype) {
 	case Legacy_3A:
 	case Loongson_3A:
 		loongson_sysconf.cores_per_node = 4;
 		loongson_sysconf.cores_per_package = 4;
 		smp_group[0] = 0x900000003ff01000;
 		smp_group[1] = 0x900010003ff01000;
 		smp_group[2] = 0x900020003ff01000;
 		smp_group[3] = 0x900030003ff01000;
 		loongson_chipcfg[0] = 0x900000001fe00180;
 		loongson_chipcfg[1] = 0x900010001fe00180;
 		loongson_chipcfg[2] = 0x900020001fe00180;
 		loongson_chipcfg[3] = 0x900030001fe00180;
 		loongson_chiptemp[0] = 0x900000001fe0019c;
 		loongson_chiptemp[1] = 0x900010001fe0019c;
 		loongson_chiptemp[2] = 0x900020001fe0019c;
 		loongson_chiptemp[3] = 0x900030001fe0019c;
 		loongson_freqctrl[0] = 0x900000001fe001d0;
 		loongson_freqctrl[1] = 0x900010001fe001d0;
 		loongson_freqctrl[2] = 0x900020001fe001d0;
 		loongson_freqctrl[3] = 0x900030001fe001d0;
 		loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
 		loongson_sysconf.workarounds = WORKAROUND_CPUFREQ;
 		break;
 	case Legacy_3B:
 	case Loongson_3B:
 		loongson_sysconf.cores_per_node = 4; /* One chip has 2 nodes */
 		loongson_sysconf.cores_per_package = 8;
 		smp_group[0] = 0x900000003ff01000;
 		smp_group[1] = 0x900010003ff05000;
 		smp_group[2] = 0x900020003ff09000;
 		smp_group[3] = 0x900030003ff0d000;
 		loongson_chipcfg[0] = 0x900000001fe00180;
 		loongson_chipcfg[1] = 0x900020001fe00180;
 		loongson_chipcfg[2] = 0x900040001fe00180;
 		loongson_chipcfg[3] = 0x900060001fe00180;
 		loongson_chiptemp[0] = 0x900000001fe0019c;
 		loongson_chiptemp[1] = 0x900020001fe0019c;
 		loongson_chiptemp[2] = 0x900040001fe0019c;
 		loongson_chiptemp[3] = 0x900060001fe0019c;
 		loongson_freqctrl[0] = 0x900000001fe001d0;
 		loongson_freqctrl[1] = 0x900020001fe001d0;
 		loongson_freqctrl[2] = 0x900040001fe001d0;
 		loongson_freqctrl[3] = 0x900060001fe001d0;
 		loongson_sysconf.ht_control_base = 0x90001EFDFB000000;
 		loongson_sysconf.workarounds = WORKAROUND_CPUHOTPLUG;
 		break;
 	default:
 		loongson_sysconf.cores_per_node = 1;
 		loongson_sysconf.cores_per_package = 1;
 		loongson_chipcfg[0] = 0x900000001fe00180;
 	}

 	loongson_sysconf.nr_cpus = ecpu->nr_cpus;
 	loongson_sysconf.boot_cpu_id = ecpu->cpu_startup_core_id;
 	loongson_sysconf.reserved_cpus_mask = ecpu->reserved_cores_mask;
 	if (ecpu->nr_cpus > NR_CPUS || ecpu->nr_cpus == 0)
 		loongson_sysconf.nr_cpus = NR_CPUS;
 	loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +
 		loongson_sysconf.cores_per_node - 1) /
 		loongson_sysconf.cores_per_node;

 	if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64C) {
 		switch (read_c0_prid() & PRID_REV_MASK) {
 		case PRID_REV_LOONGSON3A_R1:
 		case PRID_REV_LOONGSON3A_R2_0:
 		case PRID_REV_LOONGSON3A_R2_1:
 		case PRID_REV_LOONGSON3A_R3_0:
 		case PRID_REV_LOONGSON3A_R3_1:
 			loongson_fdt_blob = __dtb_loongson3_4core_rs780e_begin;
 			break;
 		case PRID_REV_LOONGSON3B_R1:
 		case PRID_REV_LOONGSON3B_R2:
 			loongson_fdt_blob = __dtb_loongson3_8core_rs780e_begin;
 			break;
 		default:
 			break;
 		}
 	}


 	if (!loongson_fdt_blob)
 		pr_err("Failed to determine built-in Loongson64 dtb\n");

 	loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
 	loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;
 	loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr;
 	loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits;
 	if (loongson_sysconf.dma_mask_bits < 32 ||
 		loongson_sysconf.dma_mask_bits > 64)
 		loongson_sysconf.dma_mask_bits = 32;

 	loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm;
 	loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;
 	loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend;

 	loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios;
 	pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n",
 		loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr,
 		loongson_sysconf.vgabios_addr);

 	memset(loongson_sysconf.ecname, 0, 32);
 	if (esys->has_ec)
 		memcpy(loongson_sysconf.ecname, esys->ec_name, 32);
 	loongson_sysconf.workarounds |= esys->workarounds;

 	loongson_sysconf.nr_uarts = esys->nr_uarts;
 	if (esys->nr_uarts < 1 || esys->nr_uarts > MAX_UARTS)
 		loongson_sysconf.nr_uarts = 1;
 	memcpy(loongson_sysconf.uarts, esys->uarts,
 		sizeof(struct uart_device) * loongson_sysconf.nr_uarts);

 	loongson_sysconf.nr_sensors = esys->nr_sensors;
 	if (loongson_sysconf.nr_sensors > MAX_SENSORS)
 		loongson_sysconf.nr_sensors = 0;
 	if (loongson_sysconf.nr_sensors)
 		memcpy(loongson_sysconf.sensors, esys->sensors,
 			sizeof(struct sensor_device) * loongson_sysconf.nr_sensors);
 	pr_info("CpuClock = %u\n", cpu_clock_freq);

 	/* Read the ID of PCI host bridge to detect bridge type */
 	id = readl(HOST_BRIDGE_CONFIG_ADDR);
 	vendor = id & 0xffff;
 	device = (id >> 16) & 0xffff;

 	if (vendor == PCI_VENDOR_ID_LOONGSON && device == 0x7a00) {
 		pr_info("The bridge chip is LS7A\n");
 		loongson_sysconf.bridgetype = LS7A;
 		loongson_sysconf.early_config = ls7a_early_config;
 	} else {
 		pr_info("The bridge chip is RS780E or SR5690\n");
 		loongson_sysconf.bridgetype = RS780E;
 		loongson_sysconf.early_config = rs780e_early_config;
 	}
 }
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Based on Ocelot Linux port, which is
	* Copyright 2001 MontaVista Software Inc.
	* Author: jsun@mvista.com or jsun@junsun.net
	*
	* Copyright 2003 ICT CAS
	* Author: Michael Guo <guoyi@ict.ac.cn>
	*
	* Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
	* Author: Fuxin Zhang, zhangfx@lemote.com
	*
	* Copyright (C) 2009 Lemote Inc.
	* Author: Wu Zhangjin, wuzhangjin@gmail.com
	*/
	#include <linux/export.h>
	#include <linux/pci_ids.h>
	#include <asm/bootinfo.h>
	#include <loongson.h>
	#include <boot_param.h>
	#include <builtin_dtbs.h>
	#include <workarounds.h>

	#define HOST_BRIDGE_CONFIG_ADDR ((void __iomem *)TO_UNCAC(0x1a000000))

	u32 cpu_clock_freq;
	EXPORT_SYMBOL(cpu_clock_freq);
	struct efi_memory_map_loongson *loongson_memmap;
	struct loongson_system_configuration loongson_sysconf;

	u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180};
	u64 loongson_chiptemp[MAX_PACKAGES];
	u64 loongson_freqctrl[MAX_PACKAGES];

	unsigned long long smp_group[4];

	const char *get_system_type(void)
	{
	return "Generic Loongson64 System";
	}

	void __init prom_init_env(void)
	{
	struct boot_params *boot_p;
	struct loongson_params *loongson_p;
	struct system_loongson *esys;
	struct efi_cpuinfo_loongson *ecpu;
	struct irq_source_routing_table *eirq_source;
	u32 id;
	u16 vendor, device;

	/* firmware arguments are initialized in head.S */
	boot_p = (struct boot_params *)fw_arg2;
	loongson_p = &(boot_p->efi.smbios.lp);

	esys = (struct system_loongson *)
	((u64)loongson_p + loongson_p->system_offset);
	ecpu = (struct efi_cpuinfo_loongson *)
	((u64)loongson_p + loongson_p->cpu_offset);
	eirq_source = (struct irq_source_routing_table *)
	((u64)loongson_p + loongson_p->irq_offset);
	loongson_memmap = (struct efi_memory_map_loongson *)
	((u64)loongson_p + loongson_p->memory_offset);

	cpu_clock_freq = ecpu->cpu_clock_freq;
	loongson_sysconf.cputype = ecpu->cputype;
	switch (ecpu->cputype) {
	case Legacy_3A:
	case Loongson_3A:
	loongson_sysconf.cores_per_node = 4;
	loongson_sysconf.cores_per_package = 4;
	smp_group[0] = 0x900000003ff01000;
	smp_group[1] = 0x900010003ff01000;
	smp_group[2] = 0x900020003ff01000;
	smp_group[3] = 0x900030003ff01000;
	loongson_chipcfg[0] = 0x900000001fe00180;
	loongson_chipcfg[1] = 0x900010001fe00180;
	loongson_chipcfg[2] = 0x900020001fe00180;
	loongson_chipcfg[3] = 0x900030001fe00180;
	loongson_chiptemp[0] = 0x900000001fe0019c;
	loongson_chiptemp[1] = 0x900010001fe0019c;
	loongson_chiptemp[2] = 0x900020001fe0019c;
	loongson_chiptemp[3] = 0x900030001fe0019c;
	loongson_freqctrl[0] = 0x900000001fe001d0;
	loongson_freqctrl[1] = 0x900010001fe001d0;
	loongson_freqctrl[2] = 0x900020001fe001d0;
	loongson_freqctrl[3] = 0x900030001fe001d0;
	loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
	loongson_sysconf.workarounds = WORKAROUND_CPUFREQ;
	break;
	case Legacy_3B:
	case Loongson_3B:
	loongson_sysconf.cores_per_node = 4; /* One chip has 2 nodes */
	loongson_sysconf.cores_per_package = 8;
	smp_group[0] = 0x900000003ff01000;
	smp_group[1] = 0x900010003ff05000;
	smp_group[2] = 0x900020003ff09000;
	smp_group[3] = 0x900030003ff0d000;
	loongson_chipcfg[0] = 0x900000001fe00180;
	loongson_chipcfg[1] = 0x900020001fe00180;
	loongson_chipcfg[2] = 0x900040001fe00180;
	loongson_chipcfg[3] = 0x900060001fe00180;
	loongson_chiptemp[0] = 0x900000001fe0019c;
	loongson_chiptemp[1] = 0x900020001fe0019c;
	loongson_chiptemp[2] = 0x900040001fe0019c;
	loongson_chiptemp[3] = 0x900060001fe0019c;
	loongson_freqctrl[0] = 0x900000001fe001d0;
	loongson_freqctrl[1] = 0x900020001fe001d0;
	loongson_freqctrl[2] = 0x900040001fe001d0;
	loongson_freqctrl[3] = 0x900060001fe001d0;
	loongson_sysconf.ht_control_base = 0x90001EFDFB000000;
	loongson_sysconf.workarounds = WORKAROUND_CPUHOTPLUG;
	break;
	default:
	loongson_sysconf.cores_per_node = 1;
	loongson_sysconf.cores_per_package = 1;
	loongson_chipcfg[0] = 0x900000001fe00180;
	}

	loongson_sysconf.nr_cpus = ecpu->nr_cpus;
	loongson_sysconf.boot_cpu_id = ecpu->cpu_startup_core_id;
	loongson_sysconf.reserved_cpus_mask = ecpu->reserved_cores_mask;
	if (ecpu->nr_cpus > NR_CPUS \|\| ecpu->nr_cpus == 0)
	loongson_sysconf.nr_cpus = NR_CPUS;
	loongson_sysconf.nr_nodes = (loongson_sysconf.nr_cpus +
	loongson_sysconf.cores_per_node - 1) /
	loongson_sysconf.cores_per_node;

	if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64C) {
	switch (read_c0_prid() & PRID_REV_MASK) {
	case PRID_REV_LOONGSON3A_R1:
	case PRID_REV_LOONGSON3A_R2_0:
	case PRID_REV_LOONGSON3A_R2_1:
	case PRID_REV_LOONGSON3A_R3_0:
	case PRID_REV_LOONGSON3A_R3_1:
	loongson_fdt_blob = __dtb_loongson3_4core_rs780e_begin;
	break;
	case PRID_REV_LOONGSON3B_R1:
	case PRID_REV_LOONGSON3B_R2:
	loongson_fdt_blob = __dtb_loongson3_8core_rs780e_begin;
	break;
	default:
	break;
	}
	}


	if (!loongson_fdt_blob)
	pr_err("Failed to determine built-in Loongson64 dtb\n");

	loongson_sysconf.pci_mem_start_addr = eirq_source->pci_mem_start_addr;
	loongson_sysconf.pci_mem_end_addr = eirq_source->pci_mem_end_addr;
	loongson_sysconf.pci_io_base = eirq_source->pci_io_start_addr;
	loongson_sysconf.dma_mask_bits = eirq_source->dma_mask_bits;
	if (loongson_sysconf.dma_mask_bits < 32 \|\|
	loongson_sysconf.dma_mask_bits > 64)
	loongson_sysconf.dma_mask_bits = 32;

	loongson_sysconf.restart_addr = boot_p->reset_system.ResetWarm;
	loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;
	loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend;

	loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios;
	pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n",
	loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr,
	loongson_sysconf.vgabios_addr);

	memset(loongson_sysconf.ecname, 0, 32);
	if (esys->has_ec)
	memcpy(loongson_sysconf.ecname, esys->ec_name, 32);
	loongson_sysconf.workarounds \|= esys->workarounds;

	loongson_sysconf.nr_uarts = esys->nr_uarts;
	if (esys->nr_uarts < 1 \|\| esys->nr_uarts > MAX_UARTS)
	loongson_sysconf.nr_uarts = 1;
	memcpy(loongson_sysconf.uarts, esys->uarts,
	sizeof(struct uart_device) * loongson_sysconf.nr_uarts);

	loongson_sysconf.nr_sensors = esys->nr_sensors;
	if (loongson_sysconf.nr_sensors > MAX_SENSORS)
	loongson_sysconf.nr_sensors = 0;
	if (loongson_sysconf.nr_sensors)
	memcpy(loongson_sysconf.sensors, esys->sensors,
	sizeof(struct sensor_device) * loongson_sysconf.nr_sensors);
	pr_info("CpuClock = %u\n", cpu_clock_freq);

	/* Read the ID of PCI host bridge to detect bridge type */
	id = readl(HOST_BRIDGE_CONFIG_ADDR);
	vendor = id & 0xffff;
	device = (id >> 16) & 0xffff;

	if (vendor == PCI_VENDOR_ID_LOONGSON && device == 0x7a00) {
	pr_info("The bridge chip is LS7A\n");
	loongson_sysconf.bridgetype = LS7A;
	loongson_sysconf.early_config = ls7a_early_config;
	} else {
	pr_info("The bridge chip is RS780E or SR5690\n");
	loongson_sysconf.bridgetype = RS780E;
	loongson_sysconf.early_config = rs780e_early_config;
	}
	}