/*******************************************************************************
* The following function initializes the cpu_context 'ctx' for
* first use, and sets the initial entrypoint state as specified by the
* entry_point_info structure.
*
* The security state to initialize is determined by the SECURE attribute
* of the entry_point_info. The function returns a pointer to the initialized
* context and sets this as the next context to return to.
*
* The EE and ST attributes are used to configure the endianness and secure
* timer availability for the new execution context.
*
* To prepare the register state for entry call cm_prepare_el3_exit() and
* el3_exit(). For Secure-EL1 cm_prepare_el3_exit() is equivalent to
* cm_e1_sysreg_context_restore().
******************************************************************************/
static void cm_init_context_common(cpu_context_t *ctx, const entry_point_info_t *ep)
{
unsigned int security_state;
uint32_t scr, sctlr;
regs_t *reg_ctx;
assert(ctx);
security_state = GET_SECURITY_STATE(ep->h.attr);
/* Clear any residual register values from the context */
memset(ctx, 0, sizeof(*ctx));
reg_ctx = get_regs_ctx(ctx);
/*
* Base the context SCR on the current value, adjust for entry point
* specific requirements
*/
scr = read_scr();
scr &= ~(SCR_NS_BIT | SCR_HCE_BIT);
if (security_state != SECURE)
scr |= SCR_NS_BIT;
/*
* Set up SCTLR for the Non Secure context.
* EE bit is taken from the entrypoint attributes
* M, C and I bits must be zero (as required by PSCI specification)
*
* The target exception level is based on the spsr mode requested.
* If execution is requested to hyp mode, HVC is enabled
* via SCR.HCE.
*
* Always compute the SCTLR_EL1 value and save in the cpu_context
* - the HYP registers are set up by cm_preapre_ns_entry() as they
* are not part of the stored cpu_context
*
* TODO: In debug builds the spsr should be validated and checked
* against the CPU support, security state, endianness and pc
*/
if (security_state != SECURE) {
sctlr = EP_GET_EE(ep->h.attr) ? SCTLR_EE_BIT : 0;
sctlr |= SCTLR_RES1;
write_ctx_reg(reg_ctx, CTX_NS_SCTLR, sctlr);
}
if (GET_M32(ep->spsr) == MODE32_hyp)
scr |= SCR_HCE_BIT;
write_ctx_reg(reg_ctx, CTX_SCR, scr);
write_ctx_reg(reg_ctx, CTX_LR, ep->pc);
write_ctx_reg(reg_ctx, CTX_SPSR, ep->spsr);
/*
* Store the r0-r3 value from the entrypoint into the context
* Use memcpy as we are in control of the layout of the structures
*/
memcpy((void *)reg_ctx, (void *)&ep->args, sizeof(aapcs32_params_t));
}
/*
* Program Priority Mask to the original Non-secure priority such that
* Non-secure interrupts may preempt Secure execution, viz. during Yielding SMC
* calls. The 'preempt_ret_code' parameter indicates the Yielding SMC's return
* value in case the call was preempted.
*
* This API is expected to be invoked before delegating a yielding SMC to Secure
* EL1. I.e. within the window of secure execution after Non-secure context is
* saved (after entry into EL3) and Secure context is restored (before entering
* Secure EL1).
*/
void ehf_allow_ns_preemption(uint64_t preempt_ret_code)
{
cpu_context_t *ns_ctx;
unsigned int old_pmr __unused;
pe_exc_data_t *pe_data = this_cpu_data();
/*
* We should have been notified earlier of entering secure world, and
* therefore have stashed the Non-secure priority mask.
*/
assert(pe_data->ns_pri_mask != 0);
/* Make sure no priority levels are active when requesting this */
if (has_valid_pri_activations(pe_data)) {
ERROR("PE %lx has priority activations: 0x%x\n",
read_mpidr_el1(), pe_data->active_pri_bits);
panic();
}
/*
* Program preempted return code to x0 right away so that, if the
* Yielding SMC was indeed preempted before a dispatcher gets a chance
* to populate it, the caller would find the correct return value.
*/
ns_ctx = cm_get_context(NON_SECURE);
assert(ns_ctx);
write_ctx_reg(get_gpregs_ctx(ns_ctx), CTX_GPREG_X0, preempt_ret_code);
old_pmr = plat_ic_set_priority_mask(pe_data->ns_pri_mask);
EHF_LOG("Priority Mask: 0x%x => 0x%x\n", old_pmr, pe_data->ns_pri_mask);
pe_data->ns_pri_mask = 0;
}
/*******************************************************************************
* This cpu has resumed from suspend. The SPD saved the TSP context when it
* completed the preceding suspend call. Use that context to program an entry
* into the TSP to allow it to do any remaining book keeping
******************************************************************************/
static void tspd_cpu_suspend_finish_handler(uint64_t max_off_pwrlvl)
{
int32_t rc = 0;
uint32_t linear_id = plat_my_core_pos();
tsp_context_t *tsp_ctx = &tspd_sp_context[linear_id];
assert(tsp_vectors);
assert(get_tsp_pstate(tsp_ctx->state) == TSP_PSTATE_SUSPEND);
/* Program the entry point, max_off_pwrlvl and enter the SP */
write_ctx_reg(get_gpregs_ctx(&tsp_ctx->cpu_ctx),
CTX_GPREG_X0,
max_off_pwrlvl);
cm_set_elr_el3(SECURE, (uint64_t) &tsp_vectors->cpu_resume_entry);
rc = tspd_synchronous_sp_entry(tsp_ctx);
/*
* Read the response from the TSP. A non-zero return means that
* something went wrong while communicating with the TSP.
*/
if (rc != 0)
panic();
/* Update its context to reflect the state the SP is in */
set_tsp_pstate(tsp_ctx->state, TSP_PSTATE_ON);
}
/*******************************************************************************
* This cpu is being suspended. S-EL1 state must have been saved in the
* resident cpu (mpidr format) if it is a UP/UP migratable TSP.
******************************************************************************/
static void tspd_cpu_suspend_handler(uint64_t power_state)
{
int32_t rc = 0;
uint64_t mpidr = read_mpidr();
uint32_t linear_id = platform_get_core_pos(mpidr);
tsp_context *tsp_ctx = &tspd_sp_context[linear_id];
assert(tsp_entry_info);
assert(tsp_ctx->state == TSP_STATE_ON);
/* Program the entry point, power_state parameter and enter the TSP */
write_ctx_reg(get_gpregs_ctx(&tsp_ctx->cpu_ctx),
CTX_GPREG_X0,
power_state);
cm_set_el3_elr(SECURE, (uint64_t) tsp_entry_info->cpu_suspend_entry);
rc = tspd_synchronous_sp_entry(tsp_ctx);
/*
* Read the response from the TSP. A non-zero return means that
* something went wrong while communicating with the TSP.
*/
if (rc != 0)
panic();
/* Update its context to reflect the state the TSP is in */
tsp_ctx->state = TSP_STATE_SUSPEND;
}
static int32_t tbase_init_secure_context(tbase_context *tbase_ctx)
{
uint32_t sctlr = read_sctlr_el3();
el1_sys_regs_t *el1_state;
uint64_t mpidr = read_mpidr();
/* Passing a NULL context is a critical programming error */
assert(tbase_ctx);
DBG_PRINTF("tbase_init_secure_context\n\r");
memset(tbase_ctx, 0, sizeof(*tbase_ctx));
/* Get a pointer to the S-EL1 context memory */
el1_state = get_sysregs_ctx(&tbase_ctx->cpu_ctx);
// Program the sctlr for S-EL1 execution with caches and mmu off
sctlr &= SCTLR_EE_BIT;
sctlr |= SCTLR_EL1_RES1;
write_ctx_reg(el1_state, CTX_SCTLR_EL1, sctlr);
/* Set this context as ready to be initialised i.e OFF */
tbase_ctx->state = TBASE_STATE_OFF;
/* Associate this context with the cpu specified */
tbase_ctx->mpidr = mpidr;
// Set up cm context for this core
cm_set_context(mpidr, &tbase_ctx->cpu_ctx, SECURE);
// cm_init_exception_stack(mpidr, SECURE);
return 0;
}
void tbase_setup_entry_nwd( cpu_context_t *ns_context, uint32_t call_offset ) {
uint64_t registerAddress = (int64_t)get_gpregs_ctx(ns_context);
// Set up registers
cpu_context_t *s_context = (cpu_context_t *) cm_get_context(SECURE);
gp_regs_t *s_gpregs = get_gpregs_ctx(s_context);
// Offset into registerFile
uint64_t registerOffset = registerAddress -registerFileStart[REGISTER_FILE_NWD];
write_ctx_reg(s_gpregs, CTX_GPREG_X0, registerOffset);
// Flags
write_ctx_reg(s_gpregs, CTX_GPREG_X1, (TBASE_NWD_REGISTER_COUNT<<8) | TBASE_SMC_NWD);
tbase_setup_entry_common( s_context, ns_context, call_offset );
}
static void tbase_setup_entry_common( cpu_context_t *s_context,
cpu_context_t *ns_context,
uint32_t call_offset) {
// Set up registers
gp_regs_t *s_gpregs = get_gpregs_ctx(s_context);
// NWd spsr
uint64_t ns_spsr = read_ctx_reg(get_el3state_ctx(ns_context), CTX_SPSR_EL3);
write_ctx_reg(s_gpregs, CTX_GPREG_X2, ns_spsr);
// Entry to tbase
el3_state_t *el3sysregs = get_el3state_ctx(s_context);
write_ctx_reg(el3sysregs, CTX_SPSR_EL3, tbaseEntrySpsr);
cm_set_elr_el3(SECURE,tbaseEntryBase+call_offset);
}
void tbase_setup_entry_monitor( cpu_context_t *ns_context ) {
uint64_t mpidr = read_mpidr();
uint32_t linear_id = platform_get_core_pos(mpidr);
uint64_t registerAddress = (int64_t)secure_context[linear_id].monitorCallRegs;
// Set up registers
cpu_context_t *s_context = (cpu_context_t *) cm_get_context(SECURE);
gp_regs_t *s_gpregs = get_gpregs_ctx(s_context);
// Offset into registerFile
uint64_t registerOffset = registerAddress -registerFileStart[REGISTER_FILE_MONITOR];
write_ctx_reg(s_gpregs, CTX_GPREG_X0, registerOffset);
// Flags
write_ctx_reg(s_gpregs, CTX_GPREG_X1, (TBASE_MAX_MONITOR_CALL_REGS<<8) | TBASE_SMC_MONITOR);
tbase_setup_entry_common( s_context, ns_context, ENTRY_OFFSET_FASTCALL );
}
/*******************************************************************************
* This function is responsible for handling all T210 SiP calls
******************************************************************************/
int plat_sip_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
const void *cookie,
void *handle,
uint64_t flags)
{
uint32_t val, ns;
/* Determine which security state this SMC originated from */
ns = is_caller_non_secure(flags);
if (!ns)
SMC_RET1(handle, SMC_UNK);
switch (smc_fid) {
case TEGRA_SIP_PMC_COMMANDS:
/* check the address is within PMC range and is 4byte aligned */
if ((x2 >= TEGRA_PMC_SIZE) || (x2 & 0x3))
return -EINVAL;
/* pmc_secure_scratch registers are not accessible */
if (((x2 >= PMC_SECURE_SCRATCH0) && (x2 <= PMC_SECURE_SCRATCH5)) ||
((x2 >= PMC_SECURE_SCRATCH6) && (x2 <= PMC_SECURE_SCRATCH7)) ||
((x2 >= PMC_SECURE_SCRATCH8) && (x2 <= PMC_SECURE_SCRATCH79)) ||
((x2 >= PMC_SECURE_SCRATCH80) && (x2 <= PMC_SECURE_SCRATCH119)))
return -EFAULT;
/* PMC secure-only registers are not accessible */
if ((x2 == PMC_DPD_ENABLE_0) || (x2 == PMC_FUSE_CONTROL_0) ||
(x2 == PMC_CRYPTO_OP_0))
return -EFAULT;
/* Perform PMC read/write */
if (x1 == PMC_READ) {
val = mmio_read_32((uint32_t)(TEGRA_PMC_BASE + x2));
write_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X1, val);
} else if (x1 == PMC_WRITE) {
mmio_write_32((uint32_t)(TEGRA_PMC_BASE + x2), (uint32_t)x3);
} else {
return -EINVAL;
}
break;
default:
ERROR("%s: unsupported function ID\n", __func__);
return -ENOTSUP;
}
return 0;
}
/*******************************************************************************
* This function is responsible for handling all SMCs in the Trusted OS/App
* range from the non-secure state as defined in the SMC Calling Convention
* Document. It is also responsible for communicating with the Secure payload
* to delegate work and return results back to the non-secure state. Lastly it
* will also return any information that the secure payload needs to do the
* work assigned to it.
******************************************************************************/
uint64_t tlkd_smc_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
cpu_context_t *ns_cpu_context;
gp_regs_t *gp_regs;
uint32_t ns;
uint64_t par;
/* Passing a NULL context is a critical programming error */
assert(handle);
/* These SMCs are only supported by CPU0 */
if ((read_mpidr() & MPIDR_CPU_MASK) != 0)
SMC_RET1(handle, SMC_UNK);
/* Determine which security state this SMC originated from */
ns = is_caller_non_secure(flags);
switch (smc_fid) {
/*
* This function ID is used by SP to indicate that it was
* preempted by a non-secure world IRQ.
*/
case TLK_PREEMPTED:
if (ns)
SMC_RET1(handle, SMC_UNK);
assert(handle == cm_get_context(SECURE));
cm_el1_sysregs_context_save(SECURE);
/* Get a reference to the non-secure context */
ns_cpu_context = cm_get_context(NON_SECURE);
assert(ns_cpu_context);
/*
* Restore non-secure state. There is no need to save the
* secure system register context since the SP was supposed
* to preserve it during S-EL1 interrupt handling.
*/
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
SMC_RET1(ns_cpu_context, x1);
/*
* Request from non secure world to resume the preempted
* Standard SMC call.
*/
case TLK_RESUME_FID:
/* RESUME should be invoked only by normal world */
if (!ns)
SMC_RET1(handle, SMC_UNK);
/*
* This is a resume request from the non-secure client.
* save the non-secure state and send the request to
* the secure payload.
*/
assert(handle == cm_get_context(NON_SECURE));
/* Check if we are already preempted before resume */
if (!get_std_smc_active_flag(tlk_ctx.state))
SMC_RET1(handle, SMC_UNK);
cm_el1_sysregs_context_save(NON_SECURE);
/*
* We are done stashing the non-secure context. Ask the
* secure payload to do the work now.
*/
/* We just need to return to the preempted point in
* SP and the execution will resume as normal.
*/
cm_el1_sysregs_context_restore(SECURE);
cm_set_next_eret_context(SECURE);
SMC_RET0(handle);
/*
* This is a request from the non-secure context to:
*
* a. register shared memory with the SP for storing it's
* activity logs.
* b. register shared memory with the SP for passing args
* required for maintaining sessions with the Trusted
* Applications.
* c. open/close sessions
* d. issue commands to the Trusted Apps
*/
case TLK_REGISTER_LOGBUF:
case TLK_REGISTER_REQBUF:
case TLK_OPEN_TA_SESSION:
case TLK_CLOSE_TA_SESSION:
case TLK_TA_LAUNCH_OP:
case TLK_TA_SEND_EVENT:
if (!ns)
SMC_RET1(handle, SMC_UNK);
/*
* This is a fresh request from the non-secure client.
* The parameters are in x1 and x2. Figure out which
* registers need to be preserved, save the non-secure
* state and send the request to the secure payload.
*/
assert(handle == cm_get_context(NON_SECURE));
/* Check if we are already preempted */
if (get_std_smc_active_flag(tlk_ctx.state))
SMC_RET1(handle, SMC_UNK);
cm_el1_sysregs_context_save(NON_SECURE);
/*
* Verify if there is a valid context to use.
*/
assert(&tlk_ctx.cpu_ctx == cm_get_context(SECURE));
/*
* Mark the SP state as active.
*/
set_std_smc_active_flag(tlk_ctx.state);
/*
* We are done stashing the non-secure context. Ask the
* secure payload to do the work now.
*/
cm_el1_sysregs_context_restore(SECURE);
cm_set_next_eret_context(SECURE);
/*
* TLK is a 32-bit Trusted OS and so expects the SMC
* arguments via r0-r7. TLK expects the monitor frame
* registers to be 64-bits long. Hence, we pass x0 in
* r0-r1, x1 in r2-r3, x3 in r4-r5 and x4 in r6-r7.
*
* As smc_fid is a uint32 value, r1 contains 0.
*/
gp_regs = get_gpregs_ctx(&tlk_ctx.cpu_ctx);
write_ctx_reg(gp_regs, CTX_GPREG_X4, (uint32_t)x2);
write_ctx_reg(gp_regs, CTX_GPREG_X5, (uint32_t)(x2 >> 32));
write_ctx_reg(gp_regs, CTX_GPREG_X6, (uint32_t)x3);
write_ctx_reg(gp_regs, CTX_GPREG_X7, (uint32_t)(x3 >> 32));
SMC_RET4(&tlk_ctx.cpu_ctx, smc_fid, 0, (uint32_t)x1,
(uint32_t)(x1 >> 32));
/*
* Translate NS/EL1-S virtual addresses.
*
* x1 = virtual address
* x3 = type (NS/S)
*
* Returns PA:lo in r0, PA:hi in r1.
*/
case TLK_VA_TRANSLATE:
/* Should be invoked only by secure world */
if (ns)
SMC_RET1(handle, SMC_UNK);
/* NS virtual addresses are 64-bit long */
if (x3 & TLK_TRANSLATE_NS_VADDR)
x1 = (uint32_t)x1 | (x2 << 32);
if (!x1)
SMC_RET1(handle, SMC_UNK);
/*
* TODO: Sanity check x1. This would require platform
* support.
*/
/* virtual address and type: ns/s */
par = tlkd_va_translate(x1, x3);
/* return physical address in r0-r1 */
SMC_RET4(handle, (uint32_t)par, (uint32_t)(par >> 32), 0, 0);
/*
* This is a request from the SP to mark completion of
* a standard function ID.
*/
case TLK_REQUEST_DONE:
if (ns)
SMC_RET1(handle, SMC_UNK);
/*
* Mark the SP state as inactive.
*/
clr_std_smc_active_flag(tlk_ctx.state);
/* Get a reference to the non-secure context */
ns_cpu_context = cm_get_context(NON_SECURE);
assert(ns_cpu_context);
/*
* This is a request completion SMC and we must switch to
* the non-secure world to pass the result.
*/
cm_el1_sysregs_context_save(SECURE);
/*
* We are done stashing the secure context. Switch to the
* non-secure context and return the result.
*/
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
SMC_RET1(ns_cpu_context, x1);
/*
* This function ID is used only by the SP to indicate it has
* finished initialising itself after a cold boot
*/
case TLK_ENTRY_DONE:
if (ns)
SMC_RET1(handle, SMC_UNK);
/*
* SP has been successfully initialized. Register power
* managemnt hooks with PSCI
*/
psci_register_spd_pm_hook(&tlkd_pm_ops);
/*
* TLK reports completion. The SPD must have initiated
* the original request through a synchronous entry
* into the SP. Jump back to the original C runtime
* context.
*/
tlkd_synchronous_sp_exit(&tlk_ctx, x1);
/*
* Return the number of service function IDs implemented to
* provide service to non-secure
*/
case TOS_CALL_COUNT:
SMC_RET1(handle, TLK_NUM_FID);
/*
* Return TLK's UID to the caller
*/
case TOS_UID:
SMC_UUID_RET(handle, tlk_uuid);
/*
* Return the version of current implementation
*/
case TOS_CALL_VERSION:
SMC_RET2(handle, TLK_VERSION_MAJOR, TLK_VERSION_MINOR);
default:
break;
}
SMC_RET1(handle, SMC_UNK);
}
/*******************************************************************************
* This function is responsible for handling all SMCs in the Trusted OS/App
* range from the non-secure state as defined in the SMC Calling Convention
* Document. It is also responsible for communicating with the Secure
* payload to delegate work and return results back to the non-secure
* state. Lastly it will also return any information that OPTEE needs to do
* the work assigned to it.
******************************************************************************/
uint64_t opteed_smc_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
cpu_context_t *ns_cpu_context;
unsigned long mpidr = read_mpidr();
uint32_t linear_id = platform_get_core_pos(mpidr);
optee_context_t *optee_ctx = &opteed_sp_context[linear_id];
uint64_t rc;
/*
* Determine which security state this SMC originated from
*/
if (is_caller_non_secure(flags)) {
/*
* This is a fresh request from the non-secure client.
* The parameters are in x1 and x2. Figure out which
* registers need to be preserved, save the non-secure
* state and send the request to the secure payload.
*/
assert(handle == cm_get_context(NON_SECURE));
cm_el1_sysregs_context_save(NON_SECURE);
/*
* We are done stashing the non-secure context. Ask the
* OPTEE to do the work now.
*/
/*
* Verify if there is a valid context to use, copy the
* operation type and parameters to the secure context
* and jump to the fast smc entry point in the secure
* payload. Entry into S-EL1 will take place upon exit
* from this function.
*/
assert(&optee_ctx->cpu_ctx == cm_get_context(SECURE));
/* Set appropriate entry for SMC.
* We expect OPTEE to manage the PSTATE.I and PSTATE.F
* flags as appropriate.
*/
if (GET_SMC_TYPE(smc_fid) == SMC_TYPE_FAST) {
cm_set_elr_el3(SECURE, (uint64_t)
&optee_vectors->fast_smc_entry);
} else {
cm_set_elr_el3(SECURE, (uint64_t)
&optee_vectors->std_smc_entry);
}
cm_el1_sysregs_context_restore(SECURE);
cm_set_next_eret_context(SECURE);
/* Propagate hypervisor client ID */
write_ctx_reg(get_gpregs_ctx(&optee_ctx->cpu_ctx),
CTX_GPREG_X7,
read_ctx_reg(get_gpregs_ctx(handle),
CTX_GPREG_X7));
SMC_RET4(&optee_ctx->cpu_ctx, smc_fid, x1, x2, x3);
}
/*
* Returning from OPTEE
*/
switch (smc_fid) {
/*
* OPTEE has finished initialising itself after a cold boot
*/
case TEESMC_OPTEED_RETURN_ENTRY_DONE:
/*
* Stash the OPTEE entry points information. This is done
* only once on the primary cpu
*/
assert(optee_vectors == NULL);
optee_vectors = (optee_vectors_t *) x1;
if (optee_vectors) {
set_optee_pstate(optee_ctx->state, OPTEE_PSTATE_ON);
/*
* OPTEE has been successfully initialized.
* Register power management hooks with PSCI
*/
psci_register_spd_pm_hook(&opteed_pm);
/*
* Register an interrupt handler for S-EL1 interrupts
* when generated during code executing in the
* non-secure state.
*/
flags = 0;
set_interrupt_rm_flag(flags, NON_SECURE);
rc = register_interrupt_type_handler(INTR_TYPE_S_EL1,
opteed_sel1_interrupt_handler,
flags);
if (rc)
panic();
}
/*
* OPTEE reports completion. The OPTEED must have initiated
* the original request through a synchronous entry into
* OPTEE. Jump back to the original C runtime context.
*/
opteed_synchronous_sp_exit(optee_ctx, x1);
/*
* These function IDs is used only by OP-TEE to indicate it has
* finished:
* 1. turning itself on in response to an earlier psci
* cpu_on request
* 2. resuming itself after an earlier psci cpu_suspend
* request.
*/
case TEESMC_OPTEED_RETURN_ON_DONE:
case TEESMC_OPTEED_RETURN_RESUME_DONE:
/*
* These function IDs is used only by the SP to indicate it has
* finished:
* 1. suspending itself after an earlier psci cpu_suspend
* request.
* 2. turning itself off in response to an earlier psci
* cpu_off request.
*/
case TEESMC_OPTEED_RETURN_OFF_DONE:
case TEESMC_OPTEED_RETURN_SUSPEND_DONE:
case TEESMC_OPTEED_RETURN_SYSTEM_OFF_DONE:
case TEESMC_OPTEED_RETURN_SYSTEM_RESET_DONE:
/*
* OPTEE reports completion. The OPTEED must have initiated the
* original request through a synchronous entry into OPTEE.
* Jump back to the original C runtime context, and pass x1 as
* return value to the caller
*/
opteed_synchronous_sp_exit(optee_ctx, x1);
/*
* OPTEE is returning from a call or being preempted from a call, in
* either case execution should resume in the normal world.
*/
case TEESMC_OPTEED_RETURN_CALL_DONE:
/*
* This is the result from the secure client of an
* earlier request. The results are in x0-x3. Copy it
* into the non-secure context, save the secure state
* and return to the non-secure state.
*/
assert(handle == cm_get_context(SECURE));
cm_el1_sysregs_context_save(SECURE);
/* Get a reference to the non-secure context */
ns_cpu_context = cm_get_context(NON_SECURE);
assert(ns_cpu_context);
/* Restore non-secure state */
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
SMC_RET4(ns_cpu_context, x1, x2, x3, x4);
/*
* OPTEE has finished handling a S-EL1 FIQ interrupt. Execution
* should resume in the normal world.
*/
case TEESMC_OPTEED_RETURN_FIQ_DONE:
/* Get a reference to the non-secure context */
ns_cpu_context = cm_get_context(NON_SECURE);
assert(ns_cpu_context);
/*
* Restore non-secure state. There is no need to save the
* secure system register context since OPTEE was supposed
* to preserve it during S-EL1 interrupt handling.
*/
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
SMC_RET0((uint64_t) ns_cpu_context);
default:
panic();
}
}
static int32_t tbase_init_entry()
{
DBG_PRINTF("tbase_init\n\r");
// Save el1 registers in case non-secure world has already been set up.
cm_el1_sysregs_context_save(NON_SECURE);
uint64_t mpidr = read_mpidr();
uint32_t linear_id = platform_get_core_pos(mpidr);
tbase_context *tbase_ctx = &secure_context[linear_id];
// Note: mapping is 1:1, so physical and virtual addresses are here the same.
cpu_context_t *ns_entry_context = (cpu_context_t *) cm_get_context(mpidr, NON_SECURE);
// ************************************************************************************
// Configure parameter passing to tbase
// Calculate page start addresses for register areas.
registerFileStart[REGISTER_FILE_NWD] = page_align((uint64_t)&ns_entry_context, DOWN);
registerFileStart[REGISTER_FILE_MONITOR] = page_align((uint64_t)&msm_area, DOWN);
// Calculate page end addresses for register areas.
registerFileEnd[REGISTER_FILE_NWD] = (uint64_t)(&ns_entry_context[TBASE_CORE_COUNT]);
registerFileEnd[REGISTER_FILE_MONITOR] = ((uint64_t)&msm_area) +sizeof(msm_area);
int32_t totalPages = 0;
for (int area=0; area<REGISTER_FILE_COUNT; area++) {
int32_t pages = page_align(registerFileEnd[area] - registerFileStart[area], UP) / PAGE_SIZE;
assert( pages +totalPages <= TBASE_INTERFACE_PAGES );
tbase_init_register_file(area, totalPages, pages);
totalPages += pages;
}
// ************************************************************************************
// Create boot structure
tbaseBootCfg.magic = TBASE_BOOTCFG_MAGIC;
tbaseBootCfg.length = sizeof(bootCfg_t);
tbaseBootCfg.version = TBASE_MONITOR_INTERFACE_VERSION;
tbaseBootCfg.dRamBase = TBASE_NWD_DRAM_BASE;
tbaseBootCfg.dRamSize = TBASE_NWD_DRAM_SIZE;
tbaseBootCfg.secDRamBase = TBASE_SWD_DRAM_BASE;
tbaseBootCfg.secDRamSize = TBASE_SWD_DRAM_SIZE;
tbaseBootCfg.secIRamBase = TBASE_SWD_IMEM_BASE;
tbaseBootCfg.secIRamSize = TBASE_SWD_IMEM_SIZE;
tbaseBootCfg.conf_mair_el3 = read_mair_el3();
tbaseBootCfg.MSMPteCount = totalPages;
tbaseBootCfg.MSMBase = (uint64_t)registerFileL2;
tbaseBootCfg.gic_distributor_base = TBASE_GIC_DIST_BASE;
tbaseBootCfg.gic_cpuinterface_base = TBASE_GIC_CPU_BASE;
tbaseBootCfg.gic_version = TBASE_GIC_VERSION;
tbaseBootCfg.total_number_spi = TBASE_SPI_COUNT;
tbaseBootCfg.ssiq_number = TBASE_SSIQ_NRO;
tbaseBootCfg.flags = TBASE_MONITOR_FLAGS;
DBG_PRINTF("*** tbase boot cfg ***\n\r");
DBG_PRINTF("* magic : 0x%.X\n\r",tbaseBootCfg.magic);
DBG_PRINTF("* length : 0x%.X\n\r",tbaseBootCfg.length);
DBG_PRINTF("* version : 0x%.X\n\r",tbaseBootCfg.version);
DBG_PRINTF("* dRamBase : 0x%.X\n\r",tbaseBootCfg.dRamBase);
DBG_PRINTF("* dRamSize : 0x%.X\n\r",tbaseBootCfg.dRamSize);
DBG_PRINTF("* secDRamBase : 0x%.X\n\r",tbaseBootCfg.secDRamBase);
DBG_PRINTF("* secDRamSize : 0x%.X\n\r",tbaseBootCfg.secDRamSize);
DBG_PRINTF("* secIRamBase : 0x%.X\n\r",tbaseBootCfg.secIRamBase);
DBG_PRINTF("* secIRamSize : 0x%.X\n\r",tbaseBootCfg.secIRamSize);
DBG_PRINTF("* conf_mair_el3 : 0x%.X\n\r",tbaseBootCfg.conf_mair_el3);
DBG_PRINTF("* MSMPteCount : 0x%.X\n\r",tbaseBootCfg.MSMPteCount);
DBG_PRINTF("* MSMBase : 0x%.X\n\r",tbaseBootCfg.MSMBase);
DBG_PRINTF("* gic_distributor_base : 0x%.X\n\r",tbaseBootCfg.gic_distributor_base);
DBG_PRINTF("* gic_cpuinterface_base : 0x%.X\n\r",tbaseBootCfg.gic_cpuinterface_base);
DBG_PRINTF("* gic_version : 0x%.X\n\r",tbaseBootCfg.gic_version);
DBG_PRINTF("* total_number_spi : 0x%.X\n\r",tbaseBootCfg.total_number_spi);
DBG_PRINTF("* ssiq_number : 0x%.X\n\r",tbaseBootCfg.ssiq_number);
DBG_PRINTF("* flags : 0x%.X\n\r",tbaseBootCfg.flags);
// ************************************************************************************
// tbaseBootCfg and l2 entries may be accesses uncached, so must flush those.
flush_dcache_range((unsigned long)&tbaseBootCfg, sizeof(bootCfg_t));
flush_dcache_range((unsigned long)®isterFileL2, sizeof(registerFileL2));
// ************************************************************************************
// Set registers for tbase initialization entry
cpu_context_t *s_entry_context = &tbase_ctx->cpu_ctx;
gp_regs_t *s_entry_gpregs = get_gpregs_ctx(s_entry_context);
write_ctx_reg(s_entry_gpregs, CTX_GPREG_X1, 0);
write_ctx_reg(s_entry_gpregs, CTX_GPREG_X1, (int64_t)&tbaseBootCfg);
// SPSR for SMC handling (FIQ mode)
tbaseEntrySpsr = TBASE_ENTRY_SPSR;
DBG_PRINTF("tbase init SPSR 0x%x\n\r", read_ctx_reg(get_el3state_ctx(&tbase_ctx->cpu_ctx),
CTX_SPSR_EL3) );
DBG_PRINTF("tbase SMC SPSR %x\nr\r", tbaseEntrySpsr );
// ************************************************************************************
// Start tbase
tbase_synchronous_sp_entry(tbase_ctx);
tbase_ctx->state = TBASE_STATE_ON;
#if TBASE_PM_ENABLE
// Register power managemnt hooks with PSCI
psci_register_spd_pm_hook(&tbase_pm);
#endif
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
return 1;
}
static uint64_t tbase_smc_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
uint64_t mpidr = read_mpidr();
uint32_t linear_id = platform_get_core_pos(mpidr);
tbase_context *tbase_ctx = &secure_context[linear_id];
int caller_security_state = flags&1;
DBG_PRINTF("tbase_smc_handler %d %x\n\r", caller_security_state, smc_fid);
if (caller_security_state==SECURE) {
// Yield to NWd
// TODO: Check id
if (tbaseInitStatus==TBASE_INIT_CONFIG_OK) {
// Save sysregs to all cores.
// After this tbase can work on any core.
save_sysregs_allcore();
tbaseInitStatus = TBASE_INIT_SYSREGS_OK;
if (tbaseExecutionStatus==TBASE_STATUS_UNINIT) {
tbaseExecutionStatus = TBASE_STATUS_NORMAL;
}
}
// If above check fails, it is not possible to return to tbase.
tbase_synchronous_sp_exit(tbase_ctx, 0, 1);
}
else {
if ((tbaseExecutionStatus&TBASE_STATUS_SMC_OK_BIT)==0) {
// TBASE must be initialized to be usable
DBG_PRINTF( "tbase_smc_handler tbase not ready for smc.\n\r");
// TODO: What is correct error code?
SMC_RET1(handle, SMC_UNK);
return 1;
}
if(tbase_ctx->state == TBASE_STATE_OFF) {
DBG_PRINTF( "tbase_smc_handler tbase not ready for fastcall\n\r" );
return 1;
}
// NSIQ, go to SWd
// TODO: Check id?
// Save NWd
gp_regs_t *ns_gpregs = get_gpregs_ctx((cpu_context_t *)handle);
write_ctx_reg(ns_gpregs, CTX_GPREG_X0, smc_fid );
write_ctx_reg(ns_gpregs, CTX_GPREG_X1, x1 );
write_ctx_reg(ns_gpregs, CTX_GPREG_X2, x2 );
write_ctx_reg(ns_gpregs, CTX_GPREG_X3, x3 );
cm_el1_sysregs_context_save(NON_SECURE);
// Load SWd
tbase_setup_entry_nwd((cpu_context_t *)handle,ENTRY_OFFSET_SMC);
// Enter tbase. tbase must return using normal SMC, which will continue here.
tbase_synchronous_sp_entry(tbase_ctx);
// Load NWd
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
}
return 0;
}
// ************************************************************************************
// fastcall handler
static uint64_t tbase_fastcall_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
uint64_t mpidr = read_mpidr();
uint32_t linear_id = platform_get_core_pos(mpidr);
tbase_context *tbase_ctx = &secure_context[linear_id];
int caller_security_state = flags&1;
if (caller_security_state==SECURE) {
switch(maskSWdRegister(smc_fid)) {
case TBASE_SMC_FASTCALL_RETURN: {
// Return values from fastcall already in cpu_context!
// TODO: Could we skip saving sysregs?
DBG_PRINTF( "tbase_fastcall_handler TBASE_SMC_FASTCALL_RETURN\n\r");
tbase_synchronous_sp_exit(tbase_ctx, 0, 1);
}
case TBASE_SMC_FASTCALL_CONFIG_OK: {
DBG_PRINTF( "tbase_fastcall_handler TBASE_SMC_FASTCALL_CONFIG_OK\n\r");
configure_tbase(x1,x2);
SMC_RET1(handle,smc_fid);
break;
}
case TBASE_SMC_FASTCALL_OUTPUT: {
output(x1,x2);
SMC_RET1(handle,smc_fid);
break;
}
case TBASE_SMC_FASTCALL_STATUS: {
DBG_PRINTF( "tbase_fastcall_handler TBASE_SMC_FASTCALL_STATUS\n\r");
tbase_status(x1,x2);
SMC_RET1(handle,smc_fid);
break;
}
case TBASE_SMC_FASTCALL_INPUT: {
DBG_PRINTF( "tbase_fastcall_handler TBASE_SMC_FASTCALL_INPUT\n\r");
smc_fid = plat_tbase_input(x1,&x2,&(tbase_ctx->tbase_input_fastcall));
SMC_RET3(handle,smc_fid,page_align(registerFileEnd[REGISTER_FILE_NWD] - registerFileStart[REGISTER_FILE_NWD], UP)+(uint64_t)&(tbase_ctx->tbase_input_fastcall)- registerFileStart[REGISTER_FILE_MONITOR],x2);
break;
}
case TBASE_SMC_FASTCALL_DUMP: {
DBG_PRINTF( "tbase_fastcall_handler TBASE_SMC_FASTCALL_DUMP\n\r");
tbase_triggerSgiDump();
SMC_RET1(handle,smc_fid);
break;
}
default: {
// What now?
DBG_PRINTF( "tbase_fastcall_handler SMC_UNK %x\n\r", smc_fid );
SMC_RET1(handle, SMC_UNK);
break;
}
}
}
else
{
if (smc_fid == TBASE_SMC_AEE_DUMP) // N-world can request AEE Dump function
{
mt_atf_trigger_WDT_FIQ();
// Once we return to the N-world's caller,
// FIQ will be trigged and bring us on EL3 (ATF) on core #0 because HW wiring.
// Then FIQ will be handled the same way as for HW WDT FIQ.
//Do we need to save-recover n-context before being able to use it for return?
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
return 0;
}
if ((tbaseExecutionStatus&TBASE_STATUS_FASTCALL_OK_BIT)==0) {
// TBASE must be initialized to be usable
// TODO: What is correct error code?
DBG_PRINTF( "tbase_fastcall_handler tbase not ready for fastcall\n\r" );
SMC_RET1(handle, SMC_UNK);
return 0;
}
if(tbase_ctx->state == TBASE_STATE_OFF) {
DBG_PRINTF( "tbase_fastcall_handler tbase not ready for fastcall\n\r" );
SMC_RET1(handle, SMC_UNK);
return 0;
}
DBG_PRINTF( "tbase_fastcall_handler NWd %x\n\r", smc_fid );
// So far all fastcalls go to tbase
// Save NWd context
gp_regs_t *ns_gpregs = get_gpregs_ctx((cpu_context_t *)handle);
write_ctx_reg(ns_gpregs, CTX_GPREG_X0, smc_fid ); // These are not saved yet
write_ctx_reg(ns_gpregs, CTX_GPREG_X1, x1 );
write_ctx_reg(ns_gpregs, CTX_GPREG_X2, x2 );
write_ctx_reg(ns_gpregs, CTX_GPREG_X3, x3 );
cm_el1_sysregs_context_save(NON_SECURE);
// Load SWd context
tbase_setup_entry_nwd((cpu_context_t *)handle,ENTRY_OFFSET_FASTCALL);
#if DEBUG
print_fastcall_params("entry", NON_SECURE);
#endif
tbase_synchronous_sp_entry(tbase_ctx);
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
return 0; // Does not seem to matter what we return
}
}
/* Setup context of the Secure Partition */
void secure_partition_setup(void)
{
VERBOSE("S-EL1/S-EL0 context setup start...\n");
cpu_context_t *ctx = cm_get_context(SECURE);
/* Make sure that we got a Secure context. */
assert(ctx != NULL);
/* Assert we are in Secure state. */
assert((read_scr_el3() & SCR_NS_BIT) == 0);
/* Disable MMU at EL1. */
disable_mmu_icache_el1();
/* Invalidate TLBs at EL1. */
tlbivmalle1();
/*
* General-Purpose registers
* -------------------------
*/
/*
* X0: Virtual address of a buffer shared between EL3 and Secure EL0.
* The buffer will be mapped in the Secure EL1 translation regime
* with Normal IS WBWA attributes and RO data and Execute Never
* instruction access permissions.
*
* X1: Size of the buffer in bytes
*
* X2: cookie value (Implementation Defined)
*
* X3: cookie value (Implementation Defined)
*
* X4 to X30 = 0 (already done by cm_init_my_context())
*/
write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X0, PLAT_SPM_BUF_BASE);
write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X1, PLAT_SPM_BUF_SIZE);
write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X2, PLAT_SPM_COOKIE_0);
write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X3, PLAT_SPM_COOKIE_1);
/*
* SP_EL0: A non-zero value will indicate to the SP that the SPM has
* initialized the stack pointer for the current CPU through
* implementation defined means. The value will be 0 otherwise.
*/
write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_SP_EL0,
PLAT_SP_IMAGE_STACK_BASE + PLAT_SP_IMAGE_STACK_PCPU_SIZE);
/*
* Setup translation tables
* ------------------------
*/
#if ENABLE_ASSERTIONS
/* Get max granularity supported by the platform. */
u_register_t id_aa64prf0_el1 = read_id_aa64pfr0_el1();
int tgran64_supported =
((id_aa64prf0_el1 >> ID_AA64MMFR0_EL1_TGRAN64_SHIFT) &
ID_AA64MMFR0_EL1_TGRAN64_MASK) ==
ID_AA64MMFR0_EL1_TGRAN64_SUPPORTED;
int tgran16_supported =
((id_aa64prf0_el1 >> ID_AA64MMFR0_EL1_TGRAN16_SHIFT) &
ID_AA64MMFR0_EL1_TGRAN16_MASK) ==
ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED;
int tgran4_supported =
((id_aa64prf0_el1 >> ID_AA64MMFR0_EL1_TGRAN4_SHIFT) &
ID_AA64MMFR0_EL1_TGRAN4_MASK) ==
ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED;
uintptr_t max_granule_size;
if (tgran64_supported) {
max_granule_size = 64 * 1024;
} else if (tgran16_supported) {
max_granule_size = 16 * 1024;
} else {
assert(tgran4_supported);
max_granule_size = 4 * 1024;
}
VERBOSE("Max translation granule supported: %lu KiB\n",
max_granule_size);
uintptr_t max_granule_size_mask = max_granule_size - 1;
/* Base must be aligned to the max granularity */
assert((ARM_SP_IMAGE_NS_BUF_BASE & max_granule_size_mask) == 0);
/* Size must be a multiple of the max granularity */
assert((ARM_SP_IMAGE_NS_BUF_SIZE & max_granule_size_mask) == 0);
#endif /* ENABLE_ASSERTIONS */
/* This region contains the exception vectors used at S-EL1. */
const mmap_region_t sel1_exception_vectors =
MAP_REGION_FLAT(SPM_SHIM_EXCEPTIONS_START,
SPM_SHIM_EXCEPTIONS_SIZE,
MT_CODE | MT_SECURE | MT_PRIVILEGED);
mmap_add_region_ctx(&secure_partition_xlat_ctx,
&sel1_exception_vectors);
mmap_add_ctx(&secure_partition_xlat_ctx,
plat_get_secure_partition_mmap(NULL));
init_xlat_tables_ctx(&secure_partition_xlat_ctx);
/*
* MMU-related registers
* ---------------------
*/
/* Set attributes in the right indices of the MAIR */
u_register_t mair_el1 =
MAIR_ATTR_SET(ATTR_DEVICE, ATTR_DEVICE_INDEX) |
MAIR_ATTR_SET(ATTR_IWBWA_OWBWA_NTR, ATTR_IWBWA_OWBWA_NTR_INDEX) |
MAIR_ATTR_SET(ATTR_NON_CACHEABLE, ATTR_NON_CACHEABLE_INDEX);
write_ctx_reg(get_sysregs_ctx(ctx), CTX_MAIR_EL1, mair_el1);
/* Setup TCR_EL1. */
u_register_t tcr_ps_bits = tcr_physical_addr_size_bits(PLAT_PHY_ADDR_SPACE_SIZE);
u_register_t tcr_el1 =
/* Size of region addressed by TTBR0_EL1 = 2^(64-T0SZ) bytes. */
(64 - __builtin_ctzl(PLAT_VIRT_ADDR_SPACE_SIZE)) |
/* Inner and outer WBWA, shareable. */
TCR_SH_INNER_SHAREABLE | TCR_RGN_OUTER_WBA | TCR_RGN_INNER_WBA |
/* Set the granularity to 4KB. */
TCR_TG0_4K |
/* Limit Intermediate Physical Address Size. */
tcr_ps_bits << TCR_EL1_IPS_SHIFT |
/* Disable translations using TBBR1_EL1. */
TCR_EPD1_BIT
/* The remaining fields related to TBBR1_EL1 are left as zero. */
;
tcr_el1 &= ~(
/* Enable translations using TBBR0_EL1 */
TCR_EPD0_BIT
);
write_ctx_reg(get_sysregs_ctx(ctx), CTX_TCR_EL1, tcr_el1);
/* Setup SCTLR_EL1 */
u_register_t sctlr_el1 = read_ctx_reg(get_sysregs_ctx(ctx), CTX_SCTLR_EL1);
sctlr_el1 |=
/*SCTLR_EL1_RES1 |*/
/* Don't trap DC CVAU, DC CIVAC, DC CVAC, DC CVAP, or IC IVAU */
SCTLR_UCI_BIT |
/* RW regions at xlat regime EL1&0 are forced to be XN. */
SCTLR_WXN_BIT |
/* Don't trap to EL1 execution of WFI or WFE at EL0. */
SCTLR_NTWI_BIT | SCTLR_NTWE_BIT |
/* Don't trap to EL1 accesses to CTR_EL0 from EL0. */
SCTLR_UCT_BIT |
/* Don't trap to EL1 execution of DZ ZVA at EL0. */
SCTLR_DZE_BIT |
/* Enable SP Alignment check for EL0 */
SCTLR_SA0_BIT |
/* Allow cacheable data and instr. accesses to normal memory. */
SCTLR_C_BIT | SCTLR_I_BIT |
/* Alignment fault checking enabled when at EL1 and EL0. */
SCTLR_A_BIT |
/* Enable MMU. */
SCTLR_M_BIT
;
sctlr_el1 &= ~(
/* Explicit data accesses at EL0 are little-endian. */
SCTLR_E0E_BIT |
/* Accesses to DAIF from EL0 are trapped to EL1. */
SCTLR_UMA_BIT
);
write_ctx_reg(get_sysregs_ctx(ctx), CTX_SCTLR_EL1, sctlr_el1);
/* Point TTBR0_EL1 at the tables of the context created for the SP. */
write_ctx_reg(get_sysregs_ctx(ctx), CTX_TTBR0_EL1,
(u_register_t)secure_partition_base_xlat_table);
/*
* Setup other system registers
* ----------------------------
*/
/* Shim Exception Vector Base Address */
write_ctx_reg(get_sysregs_ctx(ctx), CTX_VBAR_EL1,
SPM_SHIM_EXCEPTIONS_PTR);
/*
* FPEN: Forbid the Secure Partition to access FP/SIMD registers.
* TTA: Enable access to trace registers.
* ZEN (v8.2): Trap SVE instructions and access to SVE registers.
*/
write_ctx_reg(get_sysregs_ctx(ctx), CTX_CPACR_EL1,
CPACR_EL1_FPEN(CPACR_EL1_FP_TRAP_ALL));
/*
* Prepare information in buffer shared between EL3 and S-EL0
* ----------------------------------------------------------
*/
void *shared_buf_ptr = (void *) PLAT_SPM_BUF_BASE;
/* Copy the boot information into the shared buffer with the SP. */
assert((uintptr_t)shared_buf_ptr + sizeof(secure_partition_boot_info_t)
<= (PLAT_SPM_BUF_BASE + PLAT_SPM_BUF_SIZE));
assert(PLAT_SPM_BUF_BASE <= (UINTPTR_MAX - PLAT_SPM_BUF_SIZE + 1));
const secure_partition_boot_info_t *sp_boot_info =
plat_get_secure_partition_boot_info(NULL);
assert(sp_boot_info != NULL);
memcpy((void *) shared_buf_ptr, (const void *) sp_boot_info,
sizeof(secure_partition_boot_info_t));
/* Pointer to the MP information from the platform port. */
secure_partition_mp_info_t *sp_mp_info =
((secure_partition_boot_info_t *) shared_buf_ptr)->mp_info;
assert(sp_mp_info != NULL);
/*
* Point the shared buffer MP information pointer to where the info will
* be populated, just after the boot info.
*/
((secure_partition_boot_info_t *) shared_buf_ptr)->mp_info =
(secure_partition_mp_info_t *) ((uintptr_t)shared_buf_ptr
+ sizeof(secure_partition_boot_info_t));
/*
* Update the shared buffer pointer to where the MP information for the
* payload will be populated
*/
shared_buf_ptr = ((secure_partition_boot_info_t *) shared_buf_ptr)->mp_info;
/*
* Copy the cpu information into the shared buffer area after the boot
* information.
*/
assert(sp_boot_info->num_cpus <= PLATFORM_CORE_COUNT);
assert((uintptr_t)shared_buf_ptr
<= (PLAT_SPM_BUF_BASE + PLAT_SPM_BUF_SIZE -
(sp_boot_info->num_cpus * sizeof(*sp_mp_info))));
memcpy(shared_buf_ptr, (const void *) sp_mp_info,
sp_boot_info->num_cpus * sizeof(*sp_mp_info));
/*
* Calculate the linear indices of cores in boot information for the
* secure partition and flag the primary CPU
*/
sp_mp_info = (secure_partition_mp_info_t *) shared_buf_ptr;
for (unsigned int index = 0; index < sp_boot_info->num_cpus; index++) {
u_register_t mpidr = sp_mp_info[index].mpidr;
sp_mp_info[index].linear_id = plat_core_pos_by_mpidr(mpidr);
if (plat_my_core_pos() == sp_mp_info[index].linear_id)
sp_mp_info[index].flags |= MP_INFO_FLAG_PRIMARY_CPU;
}
VERBOSE("S-EL1/S-EL0 context setup end.\n");
}
/*******************************************************************************
* This function is responsible for handling all SMCs in the Trusted OS/App
* range from the non-secure state as defined in the SMC Calling Convention
* Document. It is also responsible for communicating with the XILSP to
* delegate work and return results back to the non-secure state. Lastly it
* will also return any information that the XILSP needs to do the work
* assigned to it.
******************************************************************************/
uint64_t xilspd_smc_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
cpu_context_t *ns_cpu_context;
uint32_t linear_id = plat_my_core_pos(), ns;
xilsp_context_t *xilsp_ctx = &xilspd_sp_context[linear_id];
/* Determine which security state this SMC originated from */
ns = is_caller_non_secure(flags);
switch (smc_fid) {
/*
* This function ID is used only by the SP to indicate it has
* finished initialising itself after a cold boot
*/
case XILSP_ENTRY_DONE:
if (ns)
SMC_RET1(handle, SMC_UNK);
/*
* Stash the SP entry points information. This is done
* only once on the primary cpu
*/
assert(xilsp_vectors == NULL);
xilsp_vectors = (xilsp_vectors_t *) x1;
if (xilsp_vectors)
set_xilsp_pstate(xilsp_ctx->state, XILSP_PSTATE_ON);
/*
* SP reports completion. The SPD must have initiated
* the original request through a synchronous entry
* into the SP. Jump back to the original C runtime
* context.
*/
xilspd_synchronous_sp_exit(xilsp_ctx, x1);
break;
case XILSP_ARITH:
if (ns) {
/*
* This is a fresh request from the non-secure client.
* Figure out which registers need to be preserved, save
* the non-secure state and send the request to the
* secure payload.
*/
assert(handle == cm_get_context(NON_SECURE));
cm_el1_sysregs_context_save(NON_SECURE);
/*
* We are done stashing the non-secure context. Ask the
* secure payload to do the work now.
*/
/*
* Verify if there is a valid context to use, copy the
* operation type and parameters to the secure context
* and jump to the fast smc entry point in the secure
* payload. Entry into S-EL1 will take place upon exit
* from this function.
*/
assert(&xilsp_ctx->cpu_ctx == cm_get_context(SECURE));
/* Set appropriate entry for SMC.
* We expect the XILSP to manage the PSTATE.I and
* PSTATE.F flags as appropriate.
*/
cm_set_elr_el3(SECURE, (uint64_t)
&xilsp_vectors->fast_smc_entry);
cm_el1_sysregs_context_restore(SECURE);
cm_set_next_eret_context(SECURE);
write_ctx_reg(get_gpregs_ctx(&xilsp_ctx->cpu_ctx),
CTX_GPREG_X4,
read_ctx_reg(get_gpregs_ctx(handle),
CTX_GPREG_X4));
write_ctx_reg(get_gpregs_ctx(&xilsp_ctx->cpu_ctx),
CTX_GPREG_X5,
read_ctx_reg(get_gpregs_ctx(handle),
CTX_GPREG_X5));
write_ctx_reg(get_gpregs_ctx(&xilsp_ctx->cpu_ctx),
CTX_GPREG_X6,
read_ctx_reg(get_gpregs_ctx(handle),
CTX_GPREG_X6));
/* Propagate hypervisor client ID */
write_ctx_reg(get_gpregs_ctx(&xilsp_ctx->cpu_ctx),
CTX_GPREG_X7,
read_ctx_reg(get_gpregs_ctx(handle),
CTX_GPREG_X7));
SMC_RET4(&xilsp_ctx->cpu_ctx, smc_fid, x1, x2, x3);
} else {
/*
* This is the result from the secure client of an
* earlier request. The results are in x1-x4. Copy it
* into the non-secure context, save the secure state
* and return to the non-secure state.
*/
assert(handle == cm_get_context(SECURE));
cm_el1_sysregs_context_save(SECURE);
/* Get a reference to the non-secure context */
ns_cpu_context = cm_get_context(NON_SECURE);
assert(ns_cpu_context);
/* Restore non-secure state */
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
SMC_RET4(ns_cpu_context, x1, x2, x3, x4);
}
break;
default:
break;
}
SMC_RET1(handle, SMC_UNK);
}
