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arm: mvebu: avoid hardcoded virtual address in coherency code

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Now that the coherency_get_cpu_count() function no longer requires a
very early mapping of the coherency unit registers, we can avoid the
hardcoded virtual address in coherency.c. However, the coherency
features are still used quite early, so we need to do the of_iomap()
early enough, at the ->init_timer() level, so we have the call of
coherency_init() at this point.

Unfortunately, at ->init_timer() time, it is not possible to register
a bus notifier, so we add a separate coherency_late_init() function
that gets called as as postcore_initcall(), when bus notifiers are
available.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Thomas Petazzoni
2013-06-05 09:04:55 +02:00
committed by Jason Cooper
parent b21dcafea3
commit 865e0527d2
2 changed files with 11 additions and 11 deletions
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20
arch/arm/mach-mvebu/coherency.c
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@@ -27,14 +27,7 @@
#include <asm/smp_plat.h>
#include "armada-370-xp.h"
/*
* Some functions in this file are called very early during SMP
* initialization. At that time the device tree framework is not yet
* ready, and it is not possible to get the register address to
* ioremap it. That's why the pointer below is given with an initial
* value matching its virtual mapping
*/
static void __iomem *coherency_base = ARMADA_370_XP_REGS_VIRT_BASE + 0x20200;
static void __iomem *coherency_base;
static void __iomem *coherency_cpu_base;
/* Coherency fabric registers */
@@ -135,9 +128,16 @@ int __init coherency_init(void)
coherency_base = of_iomap(np, 0);
coherency_cpu_base = of_iomap(np, 1);
set_cpu_coherent(cpu_logical_map(smp_processor_id()), 0);
bus_register_notifier(&platform_bus_type,
&mvebu_hwcc_platform_nb);
}
return 0;
}
static int __init coherency_late_init(void)
{
bus_register_notifier(&platform_bus_type,
&mvebu_hwcc_platform_nb);
return 0;
}
postcore_initcall(coherency_late_init);