forked from Minki/linux
078a55fc82
commit 3747069b25e419f6b51395f48127e9812abc3596 upstream.
The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
and are flagged as __cpuinit -- so if we remove the __cpuinit from
the arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
related content into no-ops as early as possible, since that will get
rid of these warnings. In any case, they are temporary and harmless.
Here, we remove all the MIPS __cpuinit from C code and __CPUINIT
from asm files. MIPS is interesting in this respect, because there
are also uasm users hiding behind their own renamed versions of the
__cpuinit macros.
[1] https://lkml.org/lkml/2013/5/20/589
[ralf@linux-mips.org: Folded in Paul's followup fix.]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5494/
Patchwork: https://patchwork.linux-mips.org/patch/5495/
Patchwork: https://patchwork.linux-mips.org/patch/5509/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
222 lines
5.3 KiB
C
222 lines
5.3 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/module.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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extern void xtalk_probe_node(cnodeid_t nid);
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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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int i;
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cpu_set(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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xtalk_probe_node(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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* Some interrupts are reserved by hardware or by software convention.
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* Mark these as reserved right away so they won't be used accidentally
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* later.
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*/
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for (i = 0; i <= BASE_PCI_IRQ; i++) {
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__set_bit(i, hub->irq_alloc_mask);
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LOCAL_HUB_CLR_INTR(INT_PEND0_BASELVL + i);
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}
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__set_bit(IP_PEND0_6_63, hub->irq_alloc_mask);
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LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);
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for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
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__set_bit(i, hub->irq_alloc_mask);
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LOCAL_HUB_CLR_INTR(INT_PEND1_BASELVL + i);
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}
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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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struct slice_data *si = hub->slice + slice;
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int i;
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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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for (i = 0; i < LEVELS_PER_SLICE; i++)
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si->level_to_irq[i] = -1;
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/*
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* We use this so we can find the local hub's data as fast as only
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* possible.
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*/
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cpu_data[cpu].data = si;
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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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set_c0_status(SRB_DEV0 | SRB_DEV1);
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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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hubreg_t 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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per_cpu_init();
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set_io_port_base(IO_BASE);
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}
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