mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 22:16:46 +07:00
a57140e9a8
Converted bridge code to a platform driver using the PCI generic driver
framework and use adding platform devices during xtalk scan. This allows
easier sharing bridge driver for other SGI platforms like IP30 (Octane) and
IP35 (Origin 3k, Fuel, Tezro).
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
[paul.burton@mips.com:
- Leave __phys_to_dma(), __dma_to_phys() & pcibus_to_node() in
arch/mips/pci/pci-ip27.c since the motivation for moving them
disappeared when the driver stopped being moved to drivers/pci.]
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
191 lines
4.6 KiB
C
191 lines
4.6 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
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* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/mm.h>
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#include <linux/export.h>
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#include <linux/cpumask.h>
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#include <asm/cpu.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/time.h>
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#include <asm/sn/types.h>
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#include <asm/sn/sn0/addrs.h>
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#include <asm/sn/sn0/hubni.h>
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#include <asm/sn/sn0/hubio.h>
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#include <asm/sn/klconfig.h>
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#include <asm/sn/ioc3.h>
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#include <asm/mipsregs.h>
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#include <asm/sn/gda.h>
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#include <asm/sn/hub.h>
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#include <asm/sn/intr.h>
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#include <asm/current.h>
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#include <asm/processor.h>
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#include <asm/mmu_context.h>
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#include <asm/thread_info.h>
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#include <asm/sn/launch.h>
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#include <asm/sn/sn_private.h>
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#include <asm/sn/sn0/ip27.h>
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#include <asm/sn/mapped_kernel.h>
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#define CPU_NONE (cpuid_t)-1
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static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
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nasid_t master_nasid = INVALID_NASID;
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cnodeid_t nasid_to_compact_node[MAX_NASIDS];
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nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
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cnodeid_t cpuid_to_compact_node[MAXCPUS];
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EXPORT_SYMBOL(nasid_to_compact_node);
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struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
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EXPORT_SYMBOL_GPL(sn_cpu_info);
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extern void pcibr_setup(cnodeid_t);
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static void per_hub_init(cnodeid_t cnode)
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{
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struct hub_data *hub = hub_data(cnode);
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nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
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cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
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if (test_and_set_bit(cnode, hub_init_mask))
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return;
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/*
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* Set CRB timeout at 5ms, (< PI timeout of 10ms)
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*/
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REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
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REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
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hub_rtc_init(cnode);
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#ifdef CONFIG_REPLICATE_EXHANDLERS
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/*
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* If this is not a headless node initialization,
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* copy over the caliased exception handlers.
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*/
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if (get_compact_nodeid() == cnode) {
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extern char except_vec2_generic, except_vec3_generic;
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extern void build_tlb_refill_handler(void);
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memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
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memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
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build_tlb_refill_handler();
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memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
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memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
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__flush_cache_all();
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}
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#endif
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}
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void per_cpu_init(void)
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{
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int cpu = smp_processor_id();
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int slice = LOCAL_HUB_L(PI_CPU_NUM);
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cnodeid_t cnode = get_compact_nodeid();
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struct hub_data *hub = hub_data(cnode);
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if (test_and_set_bit(slice, &hub->slice_map))
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return;
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clear_c0_status(ST0_IM);
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per_hub_init(cnode);
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cpu_time_init();
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install_ipi();
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/* Install our NMI handler if symmon hasn't installed one. */
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install_cpu_nmi_handler(cputoslice(cpu));
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enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
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enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
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}
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/*
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* get_nasid() returns the physical node id number of the caller.
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*/
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nasid_t
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get_nasid(void)
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{
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return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
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>> NSRI_NODEID_SHFT);
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}
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/*
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* Map the physical node id to a virtual node id (virtual node ids are contiguous).
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*/
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cnodeid_t get_compact_nodeid(void)
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{
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return NASID_TO_COMPACT_NODEID(get_nasid());
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}
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static inline void ioc3_eth_init(void)
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{
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struct ioc3 *ioc3;
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nasid_t nid;
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nid = get_nasid();
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ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
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ioc3->eier = 0;
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}
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extern void ip27_reboot_setup(void);
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void __init plat_mem_setup(void)
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{
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u64 p, e, n_mode;
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nasid_t nid;
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ip27_reboot_setup();
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/*
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* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
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*/
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nid = get_nasid();
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printk("IP27: Running on node %d.\n", nid);
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p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
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e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
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printk("Node %d has %s primary CPU%s.\n", nid,
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p ? "a" : "no",
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e ? ", CPU is running" : "");
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p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
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e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
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printk("Node %d has %s secondary CPU%s.\n", nid,
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p ? "a" : "no",
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e ? ", CPU is running" : "");
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/*
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* Try to catch kernel missconfigurations and give user an
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* indication what option to select.
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*/
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n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
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printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
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#ifdef CONFIG_SGI_SN_N_MODE
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if (!n_mode)
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panic("Kernel compiled for M mode.");
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#else
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if (n_mode)
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panic("Kernel compiled for N mode.");
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#endif
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ioc3_eth_init();
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ioport_resource.start = 0;
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ioport_resource.end = ~0UL;
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set_io_port_base(IO_BASE);
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}
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