https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 455c6fdbd219161bd09b1165f11699d6d73de11c authored by Linus Torvalds on 31 March 2014, 03:40:15 UTC
Linux 3.14
Linux 3.14
Tip revision: 455c6fd
cache-l2x0.c
/*
* Copyright (C) ST-Ericsson SA 2011
*
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/io.h>
#include <linux/of.h>
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
#include "db8500-regs.h"
#include "id.h"
static void __iomem *l2x0_base;
static int __init ux500_l2x0_unlock(void)
{
int i;
/*
* Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
* apparently locks both caches before jumping to the kernel. The
* l2x0 core will not touch the unlock registers if the l2x0 is
* already enabled, so we do it right here instead. The PL310 has
* 8 sets of registers, one per possible CPU.
*/
for (i = 0; i < 8; i++) {
writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
i * L2X0_LOCKDOWN_STRIDE);
writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
i * L2X0_LOCKDOWN_STRIDE);
}
return 0;
}
static int __init ux500_l2x0_init(void)
{
u32 aux_val = 0x3e000000;
if (cpu_is_u8500_family() || cpu_is_ux540_family())
l2x0_base = __io_address(U8500_L2CC_BASE);
else
/* Non-Ux500 platform */
return -ENODEV;
/* Unlock before init */
ux500_l2x0_unlock();
/* DBx540's L2 has 128KB way size */
if (cpu_is_ux540_family())
/* 128KB way size */
aux_val |= (0x4 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT);
else
/* 64KB way size */
aux_val |= (0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT);
/* 64KB way size, 8 way associativity, force WA */
if (of_have_populated_dt())
l2x0_of_init(aux_val, 0xc0000fff);
else
l2x0_init(l2x0_base, aux_val, 0xc0000fff);
/*
* We can't disable l2 as we are in non secure mode, currently
* this seems be called only during kexec path. So let's
* override outer.disable with nasty assignment until we have
* some SMI service available.
*/
outer_cache.disable = NULL;
outer_cache.set_debug = NULL;
return 0;
}
early_initcall(ux500_l2x0_init);