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ARM: 8260/1: l2c: Add interface to ask hypervisor to configure L2C

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Because certain secure hypervisor do not allow writes to individual L2C
registers, but rather expect set of parameters to be passed as argument
to secure monitor calls, there is a need to provide an interface for the
L2C driver to ask the firmware to configure the hardware according to
specified parameters. This patch adds such.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Tomasz Figa 2015-01-08 07:51:07 +01:00 committed by Russell King
parent 6b49241ac2
commit c6d1a2d007
2 changed files with 9 additions and 0 deletions
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3
arch/arm/include/asm/outercache.h
View File

@ -23,6 +23,8 @@
#include <linux/types.h>
struct l2x0_regs;
struct outer_cache_fns {
void (*inv_range)(unsigned long, unsigned long);
void (*clean_range)(unsigned long, unsigned long);
@ -36,6 +38,7 @@ struct outer_cache_fns {
/* This is an ARM L2C thing */
void (*write_sec)(unsigned long, unsigned);
void (*configure)(const struct l2x0_regs *);
};
extern struct outer_cache_fns outer_cache;

6
arch/arm/mm/cache-l2x0.c
View File

@ -110,6 +110,11 @@ static inline void l2c_unlock(void __iomem *base, unsigned num)
static void l2c_configure(void __iomem *base)
{
if (outer_cache.configure) {
outer_cache.configure(&l2x0_saved_regs);
return;
}
if (l2x0_data->configure)
l2x0_data->configure(base);
@ -910,6 +915,7 @@ static int __init __l2c_init(const struct l2c_init_data *data,
fns = data->outer_cache;
fns.write_sec = outer_cache.write_sec;
fns.configure = outer_cache.configure;
if (data->fixup)
data->fixup(l2x0_base, cache_id, &fns);