kernel_optimize_test/arch/mips/sgi-ip27/ip27-init.c

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/*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/mm.h>
MIPS: Audit and remove any unnecessary uses of module.h Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. In the case of some code where it is modular, we can extend that to also include files that are building basic support functionality but not related to loading or registering the final module; such files also have no need whatsoever for module.h The advantage in removing such instances is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h might have been the implicit source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each instance for the presence of either and replace/add as needed. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. Build coverage of all the mips defconfigs revealed the module.h header was masking a couple of implicit include instances, so we add the appropriate headers there. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: David Daney <david.daney@cavium.com> Cc: John Crispin <john@phrozen.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "Steven J. Hill" <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15131/ [james.hogan@imgtec.com: Preserve sort order where it already exists] Signed-off-by: James Hogan <james.hogan@imgtec.com>
2017-01-29 10:05:57 +08:00
#include <linux/export.h>
#include <linux/cpumask.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/time.h>
#include <asm/sn/types.h>
#include <asm/sn/sn0/addrs.h>
#include <asm/sn/sn0/hubni.h>
#include <asm/sn/sn0/hubio.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/ioc3.h>
#include <asm/mipsregs.h>
#include <asm/sn/gda.h>
#include <asm/sn/hub.h>
#include <asm/sn/intr.h>
#include <asm/current.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/thread_info.h>
#include <asm/sn/launch.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/sn0/ip27.h>
#include <asm/sn/mapped_kernel.h>
#include "ip27-common.h"
#define CPU_NONE (cpuid_t)-1
static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
nasid_t master_nasid = INVALID_NASID;
struct cpuinfo_ip27 sn_cpu_info[NR_CPUS];
EXPORT_SYMBOL_GPL(sn_cpu_info);
static void per_hub_init(nasid_t nasid)
{
struct hub_data *hub = hub_data(nasid);
cpumask_set_cpu(smp_processor_id(), &hub->h_cpus);
if (test_and_set_bit(nasid, hub_init_mask))
return;
/*
* Set CRB timeout at 5ms, (< PI timeout of 10ms)
*/
REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
hub_rtc_init(nasid);
#ifdef CONFIG_REPLICATE_EXHANDLERS
/*
* If this is not a headless node initialization,
* copy over the caliased exception handlers.
*/
if (get_nasid() == nasid) {
extern char except_vec2_generic, except_vec3_generic;
extern void build_tlb_refill_handler(void);
memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
build_tlb_refill_handler();
memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
__flush_cache_all();
}
#endif
}
MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 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>
2013-06-18 21:38:59 +08:00
void per_cpu_init(void)
{
int cpu = smp_processor_id();
int slice = LOCAL_HUB_L(PI_CPU_NUM);
nasid_t nasid = get_nasid();
struct hub_data *hub = hub_data(nasid);
if (test_and_set_bit(slice, &hub->slice_map))
return;
clear_c0_status(ST0_IM);
per_hub_init(nasid);
cpu_time_init();
install_ipi();
/* Install our NMI handler if symmon hasn't installed one. */
install_cpu_nmi_handler(cputoslice(cpu));
enable_percpu_irq(IP27_HUB_PEND0_IRQ, IRQ_TYPE_NONE);
enable_percpu_irq(IP27_HUB_PEND1_IRQ, IRQ_TYPE_NONE);
}
/*
* get_nasid() returns the physical node id number of the caller.
*/
nasid_t
get_nasid(void)
{
return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
>> NSRI_NODEID_SHFT);
}
void __init plat_mem_setup(void)
{
u64 p, e, n_mode;
nasid_t nid;
register_smp_ops(&ip27_smp_ops);
ip27_reboot_setup();
/*
* hub_rtc init and cpu clock intr enabled for later calibrate_delay.
*/
nid = get_nasid();
printk("IP27: Running on node %d.\n", nid);
p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
printk("Node %d has %s primary CPU%s.\n", nid,
p ? "a" : "no",
e ? ", CPU is running" : "");
p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
printk("Node %d has %s secondary CPU%s.\n", nid,
p ? "a" : "no",
e ? ", CPU is running" : "");
/*
* Try to catch kernel missconfigurations and give user an
* indication what option to select.
*/
n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
#ifdef CONFIG_SGI_SN_N_MODE
if (!n_mode)
panic("Kernel compiled for M mode.");
#else
if (n_mode)
panic("Kernel compiled for N mode.");
#endif
ioport_resource.start = 0;
ioport_resource.end = ~0UL;
set_io_port_base(IO_BASE);
}