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ARM: simplify early machine init hooks

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Rather than storing each machine init hook separately, store a
pointer to the machine description record and dereference this
instead.  This pointer is only available while the init sections
are present, which is not a problem as we only use it from init
code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-12-20 10:18:36 +00:00
parent cd544ce754
commit 8ff1443c54
6 changed files with 15 additions and 19 deletions
arch/arm
include/asm/mach
arch.hirq.htime.h
kernel
irq.csetup.ctime.c

5
arch/arm/include/asm/mach/arch.h
View file

@ -45,6 +45,11 @@ struct machine_desc {
#endif
};
/*
* Current machine - only accessible during boot.
*/
extern struct machine_desc *machine_desc;
/*
* Set of macros to define architecture features. This is built into
* a table by the linker.

2
arch/arm/include/asm/mach/irq.h
View file

@ -17,8 +17,6 @@ struct seq_file;
/*
* This is internal. Do not use it.
*/
extern unsigned int arch_nr_irqs;
extern void (*init_arch_irq)(void);
extern void init_FIQ(void);
extern int show_fiq_list(struct seq_file *, void *);

1
arch/arm/include/asm/mach/time.h
View file

@ -43,7 +43,6 @@ struct sys_timer {
#endif
};
extern struct sys_timer *system_timer;
extern void timer_tick(void);
#endif

7
arch/arm/kernel/irq.c
View file

@ -37,6 +37,7 @@
#include <linux/proc_fs.h>
#include <asm/system.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
@ -47,8 +48,6 @@
#define irq_finish(irq) do { } while (0)
#endif
unsigned int arch_nr_irqs;
void (*init_arch_irq)(void) __initdata = NULL;
unsigned long irq_err_count;
int show_interrupts(struct seq_file *p, void *v)
@ -154,13 +153,13 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
void __init init_IRQ(void)
{
init_arch_irq();
machine_desc->init_irq();
}
#ifdef CONFIG_SPARSE_IRQ
int __init arch_probe_nr_irqs(void)
{
nr_irqs = arch_nr_irqs ? arch_nr_irqs : NR_IRQS;
nr_irqs = machine_desc->nr_irqs ? machine_desc->nr_irqs : NR_IRQS;
return nr_irqs;
}
#endif

15
arch/arm/kernel/setup.c
View file

@ -126,6 +126,7 @@ EXPORT_SYMBOL(elf_platform);
static const char *cpu_name;
static const char *machine_name;
static char __initdata cmd_line[COMMAND_LINE_SIZE];
struct machine_desc *machine_desc __initdata;
static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
@ -708,13 +709,11 @@ static struct init_tags {
{ 0, ATAG_NONE }
};
static void (*init_machine)(void) __initdata;
static int __init customize_machine(void)
{
/* customizes platform devices, or adds new ones */
if (init_machine)
init_machine();
if (machine_desc->init_machine)
machine_desc->init_machine();
return 0;
}
arch_initcall(customize_machine);
@ -809,6 +808,7 @@ void __init setup_arch(char **cmdline_p)
setup_processor();
mdesc = setup_machine(machine_arch_type);
machine_desc = mdesc;
machine_name = mdesc->name;
if (mdesc->soft_reboot)
@ -868,13 +868,6 @@ void __init setup_arch(char **cmdline_p)
cpu_init();
tcm_init();
/*
* Set up various architecture-specific pointers
*/
arch_nr_irqs = mdesc->nr_irqs;
init_arch_irq = mdesc->init_irq;
system_timer = mdesc->timer;
init_machine = mdesc->init_machine;
#ifdef CONFIG_MULTI_IRQ_HANDLER
handle_arch_irq = mdesc->handle_irq;
#endif

4
arch/arm/kernel/time.c
View file

@ -30,12 +30,13 @@
#include <asm/leds.h>
#include <asm/thread_info.h>
#include <asm/stacktrace.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
/*
* Our system timer.
*/
struct sys_timer *system_timer;
static struct sys_timer *system_timer;
#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE)
/* this needs a better home */
@ -160,6 +161,7 @@ device_initcall(timer_init_sysfs);
void __init time_init(void)
{
system_timer = machine_desc->timer;
system_timer->init();
}