98 lines
1.8 KiB
C
98 lines
1.8 KiB
C
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/*
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* Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include <common/debug.h>
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#include <common/runtime_svc.h>
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#include <platform_def.h>
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#include "generic-arm64-smcall.h"
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int trusty_disable_serial_debug;
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struct dputc_state {
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char linebuf[128];
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unsigned l;
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};
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static struct dputc_state dputc_state[2];
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static void trusty_dputc(char ch, int secure)
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{
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unsigned i;
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struct dputc_state *s = &dputc_state[!secure];
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if (trusty_disable_serial_debug)
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return;
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s->linebuf[s->l++] = ch;
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if (s->l == sizeof(s->linebuf) || ch == '\n') {
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if (secure)
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printf("secure os: ");
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else
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printf("non-secure os: ");
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for (i = 0; i < s->l; i++) {
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putchar(s->linebuf[i]);
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}
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if (ch != '\n') {
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printf(" <...>\n");
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}
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s->l = 0;
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}
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}
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static uint64_t trusty_get_reg_base(uint32_t reg)
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{
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switch (reg) {
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case 0:
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return PLAT_ARM_GICD_BASE;
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case 1:
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return PLAT_ARM_GICC_BASE;
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default:
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NOTICE("%s(0x%x) unknown reg\n", __func__, reg);
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return SMC_UNK;
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}
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}
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static uintptr_t trusty_generic_platform_smc(uint32_t smc_fid,
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u_register_t x1,
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u_register_t x2,
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u_register_t x3,
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u_register_t x4,
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void *cookie,
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void *handle,
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u_register_t flags)
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{
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switch (smc_fid) {
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case SMC_FC_DEBUG_PUTC:
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trusty_dputc(x1, is_caller_secure(flags));
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SMC_RET1(handle, 0);
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case SMC_FC_GET_REG_BASE:
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case SMC_FC64_GET_REG_BASE:
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SMC_RET1(handle, trusty_get_reg_base(x1));
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default:
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NOTICE("%s(0x%x, 0x%lx) unknown smc\n", __func__, smc_fid, x1);
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SMC_RET1(handle, SMC_UNK);
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}
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}
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/* Define a SPD runtime service descriptor for fast SMC calls */
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DECLARE_RT_SVC(
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trusty_fast,
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SMC_ENTITY_PLATFORM_MONITOR,
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SMC_ENTITY_PLATFORM_MONITOR,
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SMC_TYPE_FAST,
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NULL,
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trusty_generic_platform_smc
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);
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