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Implement standard calls for TSP

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This patch adds call count, UID and version information SMC calls for
the Trusted OS, as specified by the SMC calling convention.

Change-Id: I9a3e84ac1bb046051db975d853dcbe9612aba6a9
This commit is contained in:
Jeenu Viswambharan 2014-02-28 11:23:35 +00:00 • committed by Dan Handley
parent 64f6ea9be7
commit 52538b9b3e
2 changed files with 40 additions and 0 deletions
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19
include/tsp.h
View file

@ -54,6 +54,25 @@
#define TSP_FID_MUL 0xf2002002
#define TSP_FID_DIV 0xf2002003
/*
* Total number of function IDs implemented for services offered to NS clients.
* The function IDs are defined above
*/
#define TSP_NUM_FID 0x4
/* TSP implementation version numbers */
#define TSP_VERSION_MAJOR 0x0 /* Major version */
#define TSP_VERSION_MINOR 0x1 /* Minor version */
/*
* Standard Trusted OS Function IDs that fall under Trusted OS call range
* according to SMC calling convention
*/
#define TOS_CALL_COUNT 0xbf00ff00 /* Number of calls implemented */
#define TOS_UID 0xbf00ff01 /* Implementation UID */
/* 0xbf00ff02 is reserved */
#define TOS_CALL_VERSION 0xbf00ff03 /* Trusted OS Call Version */
/* Definitions to help the assembler access the SMC/ERET args structure */
#define TSP_ARGS_SIZE 0x40
#define TSP_ARG0 0x0

21
services/spd/tspd/tspd_main.c
View file

@ -51,6 +51,7 @@
#include <psci.h>
#include <tspd_private.h>
#include <debug.h>
#include <uuid.h>
/*******************************************************************************
* Single structure to hold information about the various entry points into the
@ -64,6 +65,11 @@ entry_info *tsp_entry_info;
tsp_context tspd_sp_context[TSPD_CORE_COUNT];
/* TSP UID */
DEFINE_SVC_UUID(tsp_uuid,
0x5b3056a0, 0x3291, 0x427b, 0x98, 0x11,
0x71, 0x68, 0xca, 0x50, 0xf3, 0xfa);
int32_t tspd_init(meminfo *bl32_meminfo);
@ -340,6 +346,21 @@ uint64_t tspd_smc_handler(uint32_t smc_fid,
SMC_RET2(handle, read_ctx_reg(ns_gp_regs, CTX_GPREG_X1),
read_ctx_reg(ns_gp_regs, CTX_GPREG_X2));
case TOS_CALL_COUNT:
/*
* Return the number of service function IDs implemented to
* provide service to non-secure
*/
SMC_RET1(handle, TSP_NUM_FID);
case TOS_UID:
/* Return TSP UID to the caller */
SMC_UUID_RET(handle, tsp_uuid);
case TOS_CALL_VERSION:
/* Return the version of current implementation */
SMC_RET2(handle, TSP_VERSION_MAJOR, TSP_VERSION_MINOR);
default:
break;
}