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