blob: 8f6066bb56722edb43ec610b42ca6fb3df0e5dfb [file] [log] [blame]
/*
* Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <string.h>
#include <libfdt.h>
#include <platform_def.h>
#include <arch_helpers.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <common/desc_image_load.h>
#include <common/fdt_fixup.h>
#include <common/fdt_wrappers.h>
#include <lib/optee_utils.h>
#include <lib/utils.h>
#include <plat/common/platform.h>
#include "qemu_private.h"
#define MAP_BL2_TOTAL MAP_REGION_FLAT( \
bl2_tzram_layout.total_base, \
bl2_tzram_layout.total_size, \
MT_MEMORY | MT_RW | MT_SECURE)
#define MAP_BL2_RO 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)
#define MAP_BL_COHERENT_RAM MAP_REGION_FLAT( \
BL_COHERENT_RAM_BASE, \
BL_COHERENT_RAM_END \
- BL_COHERENT_RAM_BASE, \
MT_DEVICE | MT_RW | MT_SECURE)
/* Data structure which holds the extents of the trusted SRAM for BL2 */
static meminfo_t bl2_tzram_layout __aligned(CACHE_WRITEBACK_GRANULE);
void bl2_early_platform_setup2(u_register_t arg0, u_register_t arg1,
u_register_t arg2, u_register_t arg3)
{
meminfo_t *mem_layout = (void *)arg1;
/* Initialize the console to provide early debug support */
qemu_console_init();
/* Setup the BL2 memory layout */
bl2_tzram_layout = *mem_layout;
plat_qemu_io_setup();
}
static void security_setup(void)
{
/*
* This is where a TrustZone address space controller and other
* security related peripherals, would be configured.
*/
}
static void update_dt(void)
{
int ret;
void *fdt = (void *)(uintptr_t)ARM_PRELOADED_DTB_BASE;
ret = fdt_open_into(fdt, fdt, PLAT_QEMU_DT_MAX_SIZE);
if (ret < 0) {
ERROR("Invalid Device Tree at %p: error %d\n", fdt, ret);
return;
}
if (dt_add_psci_node(fdt)) {
ERROR("Failed to add PSCI Device Tree node\n");
return;
}
if (dt_add_psci_cpu_enable_methods(fdt)) {
ERROR("Failed to add PSCI cpu enable methods in Device Tree\n");
return;
}
ret = fdt_pack(fdt);
if (ret < 0)
ERROR("Failed to pack Device Tree at %p: error %d\n", fdt, ret);
}
void bl2_platform_setup(void)
{
security_setup();
update_dt();
/* TODO Initialize timer */
}
void bl2_plat_arch_setup(void)
{
const mmap_region_t bl_regions[] = {
MAP_BL2_TOTAL,
MAP_BL2_RO,
MAP_BL_COHERENT_RAM,
{0}
};
setup_page_tables(bl_regions, plat_qemu_get_mmap());
#ifdef __aarch64__
enable_mmu_el1(0);
#else
enable_mmu_svc_mon(0);
#endif
}
/*******************************************************************************
* Gets SPSR for BL32 entry
******************************************************************************/
static uint32_t qemu_get_spsr_for_bl32_entry(void)
{
#ifdef __aarch64__
/*
* The Secure Payload Dispatcher service is responsible for
* setting the SPSR prior to entry into the BL3-2 image.
*/
return 0;
#else
return SPSR_MODE32(MODE32_svc, SPSR_T_ARM, SPSR_E_LITTLE,
DISABLE_ALL_EXCEPTIONS);
#endif
}
/*******************************************************************************
* Gets SPSR for BL33 entry
******************************************************************************/
static uint32_t qemu_get_spsr_for_bl33_entry(void)
{
uint32_t spsr;
#ifdef __aarch64__
unsigned int mode;
/* Figure out what mode we enter the non-secure world in */
mode = (el_implemented(2) != EL_IMPL_NONE) ? MODE_EL2 : MODE_EL1;
/*
* TODO: Consider the possibility of specifying the SPSR in
* the FIP ToC and allowing the platform to have a say as
* well.
*/
spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
#else
spsr = SPSR_MODE32(MODE32_svc,
plat_get_ns_image_entrypoint() & 0x1,
SPSR_E_LITTLE, DISABLE_ALL_EXCEPTIONS);
#endif
return spsr;
}
#if defined(SPD_spmd) && SPMD_SPM_AT_SEL2
static int load_sps_from_tb_fw_config(struct image_info *image_info)
{
void *dtb = (void *)image_info->image_base;
const char *compat_str = "arm,sp";
const struct fdt_property *uuid;
uint32_t load_addr;
const char *name;
int sp_node;
int node;
node = fdt_node_offset_by_compatible(dtb, -1, compat_str);
if (node < 0) {
ERROR("Can't find %s in TB_FW_CONFIG", compat_str);
return -1;
}
fdt_for_each_subnode(sp_node, dtb, node) {
name = fdt_get_name(dtb, sp_node, NULL);
if (name == NULL) {
ERROR("Can't get name of node in dtb\n");
return -1;
}
uuid = fdt_get_property(dtb, sp_node, "uuid", NULL);
if (uuid == NULL) {
ERROR("Can't find property uuid in node %s", name);
return -1;
}
if (fdt_read_uint32(dtb, sp_node, "load-address",
&load_addr) < 0) {
ERROR("Can't read load-address in node %s", name);
return -1;
}
if (qemu_io_register_sp_pkg(name, uuid->data, load_addr) < 0) {
return -1;
}
}
return 0;
}
#endif /*defined(SPD_spmd) && SPMD_SPM_AT_SEL2*/
static int qemu_bl2_handle_post_image_load(unsigned int image_id)
{
int err = 0;
bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id);
#if defined(SPD_opteed) || defined(AARCH32_SP_OPTEE) || defined(SPMC_OPTEE)
bl_mem_params_node_t *pager_mem_params = NULL;
bl_mem_params_node_t *paged_mem_params = NULL;
#endif
#if defined(SPD_spmd)
bl_mem_params_node_t *bl32_mem_params = NULL;
#endif
assert(bl_mem_params);
switch (image_id) {
case BL32_IMAGE_ID:
#if defined(SPD_opteed) || defined(AARCH32_SP_OPTEE) || defined(SPMC_OPTEE)
pager_mem_params = get_bl_mem_params_node(BL32_EXTRA1_IMAGE_ID);
assert(pager_mem_params);
paged_mem_params = get_bl_mem_params_node(BL32_EXTRA2_IMAGE_ID);
assert(paged_mem_params);
err = parse_optee_header(&bl_mem_params->ep_info,
&pager_mem_params->image_info,
&paged_mem_params->image_info);
if (err != 0) {
WARN("OPTEE header parse error.\n");
}
#endif
#if defined(SPMC_OPTEE)
/*
* Explicit zeroes to unused registers since they may have
* been populated by parse_optee_header() above.
*
* OP-TEE expects system DTB in x2 and TOS_FW_CONFIG in x0,
* the latter is filled in below for TOS_FW_CONFIG_ID and
* applies to any other SPMC too.
*/
bl_mem_params->ep_info.args.arg2 = ARM_PRELOADED_DTB_BASE;
#elif defined(SPD_opteed)
/*
* OP-TEE expect to receive DTB address in x2.
* This will be copied into x2 by dispatcher.
*/
bl_mem_params->ep_info.args.arg3 = ARM_PRELOADED_DTB_BASE;
#elif defined(AARCH32_SP_OPTEE)
bl_mem_params->ep_info.args.arg0 =
bl_mem_params->ep_info.args.arg1;
bl_mem_params->ep_info.args.arg1 = 0;
bl_mem_params->ep_info.args.arg2 = ARM_PRELOADED_DTB_BASE;
bl_mem_params->ep_info.args.arg3 = 0;
#endif
bl_mem_params->ep_info.spsr = qemu_get_spsr_for_bl32_entry();
break;
case BL33_IMAGE_ID:
#ifdef AARCH32_SP_OPTEE
/* AArch32 only core: OP-TEE expects NSec EP in register LR */
pager_mem_params = get_bl_mem_params_node(BL32_IMAGE_ID);
assert(pager_mem_params);
pager_mem_params->ep_info.lr_svc = bl_mem_params->ep_info.pc;
#endif
#if ARM_LINUX_KERNEL_AS_BL33
/*
* According to the file ``Documentation/arm64/booting.txt`` of
* the Linux kernel tree, Linux expects the physical address of
* the device tree blob (DTB) in x0, while x1-x3 are reserved
* for future use and must be 0.
*/
bl_mem_params->ep_info.args.arg0 =
(u_register_t)ARM_PRELOADED_DTB_BASE;
bl_mem_params->ep_info.args.arg1 = 0U;
bl_mem_params->ep_info.args.arg2 = 0U;
bl_mem_params->ep_info.args.arg3 = 0U;
#else
/* BL33 expects to receive the primary CPU MPID (through r0) */
bl_mem_params->ep_info.args.arg0 = 0xffff & read_mpidr();
#endif
bl_mem_params->ep_info.spsr = qemu_get_spsr_for_bl33_entry();
break;
#ifdef SPD_spmd
#if SPMD_SPM_AT_SEL2
case TB_FW_CONFIG_ID:
err = load_sps_from_tb_fw_config(&bl_mem_params->image_info);
break;
#endif
case TOS_FW_CONFIG_ID:
/* An SPMC expects TOS_FW_CONFIG in x0/r0 */
bl32_mem_params = get_bl_mem_params_node(BL32_IMAGE_ID);
bl32_mem_params->ep_info.args.arg0 =
bl_mem_params->image_info.image_base;
break;
#endif
default:
/* Do nothing in default case */
break;
}
return err;
}
/*******************************************************************************
* This function can be used by the platforms to update/use image
* information for given `image_id`.
******************************************************************************/
int bl2_plat_handle_post_image_load(unsigned int image_id)
{
return qemu_bl2_handle_post_image_load(image_id);
}
uintptr_t plat_get_ns_image_entrypoint(void)
{
return NS_IMAGE_OFFSET;
}