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/*
* Copyright (c) 2013-2021, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2023, Advanced Micro Devices, Inc. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <errno.h>
#include <bl31/bl31.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <common/fdt_fixup.h>
#include <common/fdt_wrappers.h>
#include <lib/mmio.h>
#include <libfdt.h>
#include <plat/arm/common/plat_arm.h>
#include <plat/common/platform.h>
#include <plat_console.h>
#include <custom_svc.h>
#include <plat_fdt.h>
#include <plat_private.h>
#include <plat_startup.h>
#include <zynqmp_def.h>
static entry_point_info_t bl32_image_ep_info;
static entry_point_info_t bl33_image_ep_info;
/*
* Return a pointer to the 'entry_point_info' structure of the next image for
* the security state specified. BL33 corresponds to the non-secure image type
* while BL32 corresponds to the secure image type. A NULL pointer is returned
* if the image does not exist.
*/
struct entry_point_info *bl31_plat_get_next_image_ep_info(uint32_t type)
{
entry_point_info_t *next_image_info;
assert(sec_state_is_valid(type));
if (type == NON_SECURE) {
next_image_info = &bl33_image_ep_info;
} else {
next_image_info = &bl32_image_ep_info;
}
return next_image_info;
}
/*
* Set the build time defaults. We want to do this when doing a JTAG boot
* or if we can't find any other config data.
*/
static inline void bl31_set_default_config(void)
{
bl32_image_ep_info.pc = BL32_BASE;
bl32_image_ep_info.spsr = arm_get_spsr_for_bl32_entry();
bl33_image_ep_info.pc = plat_get_ns_image_entrypoint();
bl33_image_ep_info.spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
}
/*
* Perform any BL31 specific platform actions. Here is an opportunity to copy
* parameters passed by the calling EL (S-EL1 in BL2 & EL3 in BL1) before they
* are lost (potentially). This needs to be done before the MMU is initialized
* so that the memory layout can be used while creating page tables.
*/
void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
u_register_t arg2, u_register_t arg3)
{
uint64_t tfa_handoff_addr;
setup_console();
/* Initialize the platform config for future decision making */
zynqmp_config_setup();
/*
* Do initial security configuration to allow DRAM/device access. On
* Base ZYNQMP only DRAM security is programmable (via TrustZone), but
* other platforms might have more programmable security devices
* present.
*/
/* Populate common information for BL32 and BL33 */
SET_PARAM_HEAD(&bl32_image_ep_info, PARAM_EP, VERSION_1, 0);
SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE);
SET_PARAM_HEAD(&bl33_image_ep_info, PARAM_EP, VERSION_1, 0);
SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
tfa_handoff_addr = mmio_read_32(PMU_GLOBAL_GEN_STORAGE6);
if (zynqmp_get_bootmode() == ZYNQMP_BOOTMODE_JTAG) {
bl31_set_default_config();
} else {
/* use parameters from XBL */
enum xbl_handoff ret = xbl_handover(&bl32_image_ep_info,
&bl33_image_ep_info,
tfa_handoff_addr);
if (ret != XBL_HANDOFF_SUCCESS) {
panic();
}
}
if (bl32_image_ep_info.pc != 0) {
NOTICE("BL31: Secure code at 0x%lx\n", bl32_image_ep_info.pc);
}
if (bl33_image_ep_info.pc != 0) {
NOTICE("BL31: Non secure code at 0x%lx\n", bl33_image_ep_info.pc);
}
custom_early_setup();
}
#if ZYNQMP_WDT_RESTART
static zynmp_intr_info_type_el3_t type_el3_interrupt_table[MAX_INTR_EL3];
int request_intr_type_el3(uint32_t id, interrupt_type_handler_t handler)
{
static uint32_t index;
uint32_t i;
/* Validate 'handler' and 'id' parameters */
if (!handler || index >= MAX_INTR_EL3) {
return -EINVAL;
}
/* Check if a handler has already been registered */
for (i = 0; i < index; i++) {
if (id == type_el3_interrupt_table[i].id) {
return -EALREADY;
}
}
type_el3_interrupt_table[index].id = id;
type_el3_interrupt_table[index].handler = handler;
index++;
return 0;
}
static uint64_t rdo_el3_interrupt_handler(uint32_t id, uint32_t flags,
void *handle, void *cookie)
{
uint32_t intr_id;
uint32_t i;
interrupt_type_handler_t handler = NULL;
intr_id = plat_ic_get_pending_interrupt_id();
for (i = 0; i < MAX_INTR_EL3; i++) {
if (intr_id == type_el3_interrupt_table[i].id) {
handler = type_el3_interrupt_table[i].handler;
}
}
if (handler != NULL) {
return handler(intr_id, flags, handle, cookie);
}
return 0;
}
#endif
void bl31_platform_setup(void)
{
prepare_dtb();
/* Initialize the gic cpu and distributor interfaces */
plat_arm_gic_driver_init();
plat_arm_gic_init();
}
void bl31_plat_runtime_setup(void)
{
#if ZYNQMP_WDT_RESTART
uint64_t flags = 0;
uint64_t rc;
set_interrupt_rm_flag(flags, NON_SECURE);
rc = register_interrupt_type_handler(INTR_TYPE_EL3,
rdo_el3_interrupt_handler, flags);
if (rc) {
panic();
}
#endif
custom_runtime_setup();
console_switch_state(CONSOLE_FLAG_RUNTIME);
}
/*
* Perform the very early platform specific architectural setup here.
*/
void bl31_plat_arch_setup(void)
{
plat_arm_interconnect_init();
plat_arm_interconnect_enter_coherency();
const mmap_region_t bl_regions[] = {
#if (defined(XILINX_OF_BOARD_DTB_ADDR) && !IS_TFA_IN_OCM(BL31_BASE))
MAP_REGION_FLAT(XILINX_OF_BOARD_DTB_ADDR, XILINX_OF_BOARD_DTB_MAX_SIZE,
MT_MEMORY | MT_RW | MT_NS),
#endif
MAP_REGION_FLAT(BL31_BASE, BL31_END - BL31_BASE,
MT_MEMORY | MT_RW | MT_SECURE),
MAP_REGION_FLAT(BL_CODE_BASE, BL_CODE_END - BL_CODE_BASE,
MT_CODE | MT_SECURE),
MAP_REGION_FLAT(BL_RO_DATA_BASE, BL_RO_DATA_END - BL_RO_DATA_BASE,
MT_RO_DATA | MT_SECURE),
MAP_REGION_FLAT(BL_COHERENT_RAM_BASE,
BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE,
MT_DEVICE | MT_RW | MT_SECURE),
{0}
};
custom_mmap_add();
setup_page_tables(bl_regions, plat_get_mmap());
enable_mmu_el3(0);
}
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