78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/* Copyright (c) 2011, The Linux Foundation. All rights reserved.
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
* * Neither the name of The Linux Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
|
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <reg.h>
|
|
#include <platform/clock.h>
|
|
#include <platform/scm-io.h>
|
|
#include <platform/iomap.h>
|
|
|
|
#pragma GCC optimize ("O0")
|
|
|
|
#define SCM_IO_READ ((((0x5 << 10) | 0x1) << 12) | (0x2 << 8) | 0x1)
|
|
#define SCM_IO_WRITE ((((0x5 << 10) | 0x2) << 12) | (0x2 << 8) | 0x2)
|
|
|
|
#define BETWEEN(p, st, sz) ((p) >= (void *)(st) && \
|
|
(p) < ((void *)(st) + (sz)))
|
|
|
|
extern void dmb(void);
|
|
|
|
uint32_t secure_readl(uint32_t c)
|
|
{
|
|
if ((BETWEEN((void *)c, MSM_MMSS_CLK_CTL_BASE, MSM_MMSS_CLK_CTL_SIZE))
|
|
|| (BETWEEN((void *)c, MSM_TCSR_BASE, MSM_TCSR_SIZE))) {
|
|
uint32_t context_id;
|
|
register uint32_t r0 __asm__("r0") = SCM_IO_READ;
|
|
register uint32_t r1 __asm__("r1") = (uint32_t) & context_id;
|
|
register uint32_t r2 __asm__("r2") = c;
|
|
|
|
__asm__("smc #0 @ switch to secure world\n":"=r"(r0)
|
|
: "r"(r0), "r"(r1), "r"(r2)
|
|
);
|
|
dmb();
|
|
return r0;
|
|
}
|
|
return readl(c);
|
|
}
|
|
|
|
void secure_writel(uint32_t v, uint32_t c)
|
|
{
|
|
if ((BETWEEN((void *)c, MSM_MMSS_CLK_CTL_BASE, MSM_MMSS_CLK_CTL_SIZE))
|
|
|| (BETWEEN((void *)c, MSM_TCSR_BASE, MSM_TCSR_SIZE))) {
|
|
uint32_t context_id;
|
|
register uint32_t r0 __asm__("r0") = SCM_IO_WRITE;
|
|
register uint32_t r1 __asm__("r1") = (uint32_t) & context_id;
|
|
register uint32_t r2 __asm__("r2") = c;
|
|
register uint32_t r3 __asm__("r3") = v;
|
|
dmb();
|
|
__asm__("smc #0 @ switch to secure world\n": /* No return value */
|
|
:"r"(r0), "r"(r1), "r"(r2), "r"(r3)
|
|
);
|
|
} else
|
|
writel(v, c);
|
|
}
|