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/* Copyright (c) 2011, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <mach/msm_iomap.h>
#include <mach/scm.h>
#include <mach/scm-io.h>
#define SCM_IO_READ 0x1
#define SCM_IO_WRITE 0x2
#define BETWEEN(p, st, sz) ((p) >= (void __iomem *)(st) && \
(p) < ((void __iomem *)(st) + (sz)))
#define XLATE(p, pst, vst) ((u32)((p) - (vst)) + (pst))
static u32 __secure_readl(u32 addr)
{
u32 r;
r = scm_call_atomic1(SCM_SVC_IO, SCM_IO_READ, addr);
__iormb();
return r;
}
u32 secure_readl(void __iomem *c)
{
if (BETWEEN(c, MSM_MMSS_CLK_CTL_BASE, MSM_MMSS_CLK_CTL_SIZE))
return __secure_readl(XLATE(c, MSM_MMSS_CLK_CTL_PHYS,
MSM_MMSS_CLK_CTL_BASE));
else if (BETWEEN(c, MSM_TCSR_BASE, MSM_TCSR_SIZE))
return __secure_readl(XLATE(c, MSM_TCSR_PHYS, MSM_TCSR_BASE));
return readl(c);
}
EXPORT_SYMBOL(secure_readl);
static void __secure_writel(u32 v, u32 addr)
{
__iowmb();
scm_call_atomic2(SCM_SVC_IO, SCM_IO_WRITE, addr, v);
}
void secure_writel(u32 v, void __iomem *c)
{
if (BETWEEN(c, MSM_MMSS_CLK_CTL_BASE, MSM_MMSS_CLK_CTL_SIZE))
__secure_writel(v, XLATE(c, MSM_MMSS_CLK_CTL_PHYS,
MSM_MMSS_CLK_CTL_BASE));
else if (BETWEEN(c, MSM_TCSR_BASE, MSM_TCSR_SIZE))
__secure_writel(v, XLATE(c, MSM_TCSR_PHYS, MSM_TCSR_BASE));
else
writel(v, c);
}
EXPORT_SYMBOL(secure_writel);
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