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

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);