diff options
Diffstat (limited to 'services/std_svc/spm/spm_setup.c')
| -rw-r--r-- | services/std_svc/spm/spm_setup.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/services/std_svc/spm/spm_setup.c b/services/std_svc/spm/spm_setup.c new file mode 100644 index 00000000..aca779f5 --- /dev/null +++ b/services/std_svc/spm/spm_setup.c @@ -0,0 +1,145 @@ +/* + * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <arch_helpers.h> +#include <assert.h> +#include <common_def.h> +#include <context.h> +#include <context_mgmt.h> +#include <debug.h> +#include <platform_def.h> +#include <platform.h> +#include <sp_res_desc.h> +#include <sprt_host.h> +#include <string.h> +#include <xlat_tables_v2.h> + +#include "spm_private.h" +#include "spm_shim_private.h" + +/* Setup context of the Secure Partition */ +void spm_sp_setup(sp_context_t *sp_ctx) +{ + cpu_context_t *ctx = &(sp_ctx->cpu_ctx); + + /* + * Initialize CPU context + * ---------------------- + */ + + entry_point_info_t ep_info = {0}; + + SET_PARAM_HEAD(&ep_info, PARAM_EP, VERSION_1, SECURE | EP_ST_ENABLE); + + /* Setup entrypoint and SPSR */ + ep_info.pc = sp_ctx->rd.attribute.entrypoint; + ep_info.spsr = SPSR_64(MODE_EL0, MODE_SP_EL0, DISABLE_ALL_EXCEPTIONS); + + /* + * X0: Unused (MBZ). + * X1: Unused (MBZ). + * X2: cookie value (Implementation Defined) + * X3: cookie value (Implementation Defined) + * X4 to X7 = 0 + */ + ep_info.args.arg0 = 0; + ep_info.args.arg1 = 0; + ep_info.args.arg2 = PLAT_SPM_COOKIE_0; + ep_info.args.arg3 = PLAT_SPM_COOKIE_1; + + cm_setup_context(ctx, &ep_info); + + /* + * Setup translation tables + * ------------------------ + */ + + sp_map_memory_regions(sp_ctx); + + /* + * MMU-related registers + * --------------------- + */ + xlat_ctx_t *xlat_ctx = sp_ctx->xlat_ctx_handle; + + uint64_t mmu_cfg_params[MMU_CFG_PARAM_MAX]; + + setup_mmu_cfg((uint64_t *)&mmu_cfg_params, 0, xlat_ctx->base_table, + xlat_ctx->pa_max_address, xlat_ctx->va_max_address, + EL1_EL0_REGIME); + + write_ctx_reg(get_sysregs_ctx(ctx), CTX_MAIR_EL1, + mmu_cfg_params[MMU_CFG_MAIR]); + + write_ctx_reg(get_sysregs_ctx(ctx), CTX_TCR_EL1, + mmu_cfg_params[MMU_CFG_TCR]); + + write_ctx_reg(get_sysregs_ctx(ctx), CTX_TTBR0_EL1, + mmu_cfg_params[MMU_CFG_TTBR0]); + + /* 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); + + /* + * Setup other system registers + * ---------------------------- + */ + + /* Shim Exception Vector Base Address */ + write_ctx_reg(get_sysregs_ctx(ctx), CTX_VBAR_EL1, + SPM_SHIM_EXCEPTIONS_PTR); + + /* + * FPEN: Allow the Secure Partition to access FP/SIMD registers. + * Note that SPM will not do any saving/restoring of these registers on + * behalf of the SP. This falls under the SP's responsibility. + * 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_NONE)); + + /* + * Prepare shared buffers + * ---------------------- + */ + + /* Initialize SPRT queues */ + sprt_initialize_queues((void *)sp_ctx->spm_sp_buffer_base, + sp_ctx->spm_sp_buffer_size); +} |