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/*
* Copyright (c) 2016, ARM Limited and Contributors. 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 ARM 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 <debug.h>
#include <runtime_svc.h>
#include "generic-arm64-smcall.h"
int trusty_disable_serial_debug;
struct dputc_state {
char linebuf[128];
unsigned l;
};
static struct dputc_state dputc_state[2];
static void trusty_dputc(char ch, int secure)
{
unsigned i;
struct dputc_state *s = &dputc_state[!secure];
if (trusty_disable_serial_debug)
return;
s->linebuf[s->l++] = ch;
if (s->l == sizeof(s->linebuf) || ch == '\n') {
if (secure)
printf("secure os: ");
else
printf("non-secure os: ");
for (i = 0; i < s->l; i++) {
putchar(s->linebuf[i]);
}
if (ch != '\n') {
printf(" <...>\n");
}
s->l = 0;
}
}
static uint64_t trusty_get_reg_base(uint32_t reg)
{
switch (reg) {
case 0:
return PLAT_ARM_GICD_BASE;
case 1:
return PLAT_ARM_GICC_BASE;
default:
NOTICE("%s(0x%x) unknown reg\n", __func__, reg);
return SMC_UNK;
}
}
static uint64_t trusty_generic_platform_smc(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
switch(smc_fid) {
case SMC_FC_DEBUG_PUTC:
trusty_dputc(x1, is_caller_secure(flags));
SMC_RET1(handle, 0);
case SMC_FC_GET_REG_BASE:
case SMC_FC64_GET_REG_BASE:
SMC_RET1(handle, trusty_get_reg_base(x1));
default:
NOTICE("%s(0x%x, 0x%lx) unknown smc\n", __func__, smc_fid, x1);
SMC_RET1(handle, SMC_UNK);
}
}
/* Define a SPD runtime service descriptor for fast SMC calls */
DECLARE_RT_SVC(
trusty_fast,
SMC_ENTITY_PLATFORM_MONITOR,
SMC_ENTITY_PLATFORM_MONITOR,
SMC_TYPE_FAST,
NULL,
trusty_generic_platform_smc
);
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