3f2bc4d6eb
msm-2.6.38: tag AU_LINUX_ANDROID_GINGERBREAD.02.03.04.00.142 Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/* Copyright (c) 2011, Code Aurora Forum. 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-io.h>
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#define SCM_IO_READ ((((0x5 << 10) | 0x1) << 12) | (0x2 << 8) | 0x1)
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#define SCM_IO_WRITE ((((0x5 << 10) | 0x2) << 12) | (0x2 << 8) | 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 context_id;
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register u32 r0 asm("r0") = SCM_IO_READ;
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register u32 r1 asm("r1") = (u32)&context_id;
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register u32 r2 asm("r2") = addr;
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asm(
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__asmeq("%0", "r0")
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__asmeq("%1", "r0")
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__asmeq("%2", "r1")
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__asmeq("%3", "r2")
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"smc #0 @ switch to secure world\n"
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: "=r" (r0)
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: "r" (r0), "r" (r1), "r" (r2)
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);
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__iormb();
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return r0;
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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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u32 context_id;
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register u32 r0 asm("r0") = SCM_IO_WRITE;
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register u32 r1 asm("r1") = (u32)&context_id;
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register u32 r2 asm("r2") = addr;
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register u32 r3 asm("r3") = v;
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__iowmb();
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asm(
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__asmeq("%0", "r0")
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__asmeq("%1", "r1")
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__asmeq("%2", "r2")
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__asmeq("%3", "r3")
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"smc #0 @ switch to secure world\n"
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: /* No return value */
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: "r" (r0), "r" (r1), "r" (r2), "r" (r3)
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);
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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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