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ARM: SMP: consolidate the common parts of smp_prepare_cpus()

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There is a certain amount of smp_prepare_cpus() which doesn't belong
in the platform support code - that is, code which is invariant to the
SMP implementation.  Move this code into arch/arm/kernel/smp.c, and
add a platform_ prefix to the original function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2010-12-03 11:09:48 +00:00
parent aec66ba1f7
commit 05c74a6cbc
8 changed files with 82 additions and 168 deletions
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43
arch/arm/mach-vexpress/platsmp.c
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@@ -17,7 +17,6 @@
#include <linux/io.h>
#include <asm/cacheflush.h>
#include <asm/localtimer.h>
#include <asm/smp_scu.h>
#include <asm/unified.h>
@@ -136,20 +135,10 @@ void __init smp_init_cpus(void)
set_cpu_possible(i, true);
}
void __init smp_prepare_cpus(unsigned int max_cpus)
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
{
unsigned int ncores = num_possible_cpus();
unsigned int cpu = smp_processor_id();
int i;
smp_store_cpu_info(cpu);
/*
* are we trying to boot more cores than exist?
*/
if (max_cpus > ncores)
max_cpus = ncores;
/*
* Initialise the present map, which describes the set of CPUs
* actually populated at the present time.
@@ -157,27 +146,15 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
for (i = 0; i < max_cpus; i++)
set_cpu_present(i, true);
scu_enable(scu_base_addr());
/*
* Initialise the SCU if there are more than one CPU and let
* them know where to start.
* Write the address of secondary startup into the
* system-wide flags register. The boot monitor waits
* until it receives a soft interrupt, and then the
* secondary CPU branches to this address.
*/
if (max_cpus > 1) {
/*
* Enable the local timer or broadcast device for the
* boot CPU, but only if we have more than one CPU.
*/
percpu_timer_setup();
scu_enable(scu_base_addr());
/*
* Write the address of secondary startup into the
* system-wide flags register. The boot monitor waits
* until it receives a soft interrupt, and then the
* secondary CPU branches to this address.
*/
writel(~0, MMIO_P2V(V2M_SYS_FLAGSCLR));
writel(BSYM(virt_to_phys(vexpress_secondary_startup)),
MMIO_P2V(V2M_SYS_FLAGSSET));
}
writel(~0, MMIO_P2V(V2M_SYS_FLAGSCLR));
writel(BSYM(virt_to_phys(vexpress_secondary_startup)),
MMIO_P2V(V2M_SYS_FLAGSSET));
}