78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
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/* Copyright (c) 2011, The Linux Foundation. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <reg.h>
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#include <platform/clock.h>
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#include <platform/scm-io.h>
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#include <platform/iomap.h>
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#pragma GCC optimize ("O0")
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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 *)(st) && \
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(p) < ((void *)(st) + (sz)))
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extern void dmb(void);
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uint32_t secure_readl(uint32_t c)
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{
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if ((BETWEEN((void *)c, MSM_MMSS_CLK_CTL_BASE, MSM_MMSS_CLK_CTL_SIZE))
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|| (BETWEEN((void *)c, MSM_TCSR_BASE, MSM_TCSR_SIZE))) {
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uint32_t context_id;
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register uint32_t r0 __asm__("r0") = SCM_IO_READ;
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register uint32_t r1 __asm__("r1") = (uint32_t) & context_id;
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register uint32_t r2 __asm__("r2") = c;
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__asm__("smc #0 @ switch to secure world\n":"=r"(r0)
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: "r"(r0), "r"(r1), "r"(r2)
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);
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dmb();
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return r0;
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}
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return readl(c);
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}
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void secure_writel(uint32_t v, uint32_t c)
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{
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if ((BETWEEN((void *)c, MSM_MMSS_CLK_CTL_BASE, MSM_MMSS_CLK_CTL_SIZE))
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|| (BETWEEN((void *)c, MSM_TCSR_BASE, MSM_TCSR_SIZE))) {
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uint32_t context_id;
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register uint32_t r0 __asm__("r0") = SCM_IO_WRITE;
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register uint32_t r1 __asm__("r1") = (uint32_t) & context_id;
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register uint32_t r2 __asm__("r2") = c;
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register uint32_t r3 __asm__("r3") = v;
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dmb();
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__asm__("smc #0 @ switch to secure world\n": /* No return value */
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:"r"(r0), "r"(r1), "r"(r2), "r"(r3)
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);
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} else
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writel(v, c);
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}
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