Commit c6d1a2d0 authored by Tomasz Figa's avatar Tomasz Figa Committed by Russell King
Browse files

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: default avatarTomasz Figa <t.figa@samsung.com>
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Tested-by: default avatarNishanth Menon <nm@ti.com>
Acked-by: default avatarNishanth Menon <nm@ti.com>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 6b49241a

arch/arm/include/asm/outercache.h

+3 −0
Original line number Diff line number Diff line
@@ -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;

arch/arm/mm/cache-l2x0.c

+6 −0
Original line number Diff line number Diff line
@@ -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);