Add bl31 support common across Broadcom platforms
Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@broadcom.com>
Change-Id: Ic1a392a633b447935fa3a7528326c97845f5b1bc
diff --git a/plat/brcm/common/brcm_bl31_setup.c b/plat/brcm/common/brcm_bl31_setup.c
new file mode 100644
index 0000000..d3fa83d
--- /dev/null
+++ b/plat/brcm/common/brcm_bl31_setup.c
@@ -0,0 +1,291 @@
+/*
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <drivers/arm/sp804_delay_timer.h>
+#include <lib/utils.h>
+#include <plat/common/platform.h>
+
+#include <bcm_console.h>
+#include <plat_brcm.h>
+#include <platform_def.h>
+
+#ifdef BL33_SHARED_DDR_BASE
+struct bl33_info *bl33_info = (struct bl33_info *)BL33_SHARED_DDR_BASE;
+#endif
+
+/*
+ * Placeholder variables for copying the arguments that have been passed to
+ * BL31 from BL2.
+ */
+static entry_point_info_t bl32_image_ep_info;
+static entry_point_info_t bl33_image_ep_info;
+
+/* Weak definitions may be overridden in specific BRCM platform */
+#pragma weak plat_bcm_bl31_early_platform_setup
+#pragma weak plat_brcm_pwrc_setup
+#pragma weak plat_brcm_security_setup
+
+void plat_brcm_security_setup(void)
+{
+
+}
+
+void plat_brcm_pwrc_setup(void)
+{
+
+}
+
+void plat_bcm_bl31_early_platform_setup(void *from_bl2,
+ bl_params_t *plat_params_from_bl2)
+{
+
+}
+
+/*******************************************************************************
+ * 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));
+ next_image_info = (type == NON_SECURE)
+ ? &bl33_image_ep_info : &bl32_image_ep_info;
+ /*
+ * None of the images on the ARM development platforms can have 0x0
+ * as the entrypoint
+ */
+ if (next_image_info->pc)
+ return next_image_info;
+ else
+ return NULL;
+}
+
+/*******************************************************************************
+ * Perform any BL31 early platform setup common to ARM standard platforms.
+ * 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. BL2 has flushed this information to memory, so
+ * we are guaranteed to pick up good data.
+ ******************************************************************************/
+void __init brcm_bl31_early_platform_setup(void *from_bl2,
+ uintptr_t soc_fw_config,
+ uintptr_t hw_config,
+ void *plat_params_from_bl2)
+{
+ /* Initialize the console to provide early debug support */
+ bcm_console_boot_init();
+
+ /* Initialize delay timer driver using SP804 dual timer 0 */
+ sp804_timer_init(SP804_TIMER0_BASE,
+ SP804_TIMER0_CLKMULT, SP804_TIMER0_CLKDIV);
+
+#if RESET_TO_BL31
+ /* There are no parameters from BL2 if BL31 is a reset vector */
+ assert(from_bl2 == NULL);
+ assert(plat_params_from_bl2 == NULL);
+
+# ifdef BL32_BASE
+ /* Populate entry point information for BL32 */
+ SET_PARAM_HEAD(&bl32_image_ep_info,
+ PARAM_EP,
+ VERSION_1,
+ 0);
+ SET_SECURITY_STATE(bl32_image_ep_info.h.attr, SECURE);
+ bl32_image_ep_info.pc = BL32_BASE;
+ bl32_image_ep_info.spsr = brcm_get_spsr_for_bl32_entry();
+# endif /* BL32_BASE */
+
+ /* Populate entry point information for BL33 */
+ SET_PARAM_HEAD(&bl33_image_ep_info,
+ PARAM_EP,
+ VERSION_1,
+ 0);
+ /*
+ * Tell BL31 where the non-trusted software image
+ * is located and the entry state information
+ */
+ bl33_image_ep_info.pc = plat_get_ns_image_entrypoint();
+
+ bl33_image_ep_info.spsr = brcm_get_spsr_for_bl33_entry();
+ SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
+
+# 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.
+ */
+ bl33_image_ep_info.args.arg0 = (u_register_t)PRELOADED_DTB_BASE;
+ bl33_image_ep_info.args.arg1 = 0U;
+ bl33_image_ep_info.args.arg2 = 0U;
+ bl33_image_ep_info.args.arg3 = 0U;
+# endif
+
+#else /* RESET_TO_BL31 */
+
+ /*
+ * In debug builds, we pass a special value in 'plat_params_from_bl2'
+ * to verify platform parameters from BL2 to BL31.
+ * In release builds, it's not used.
+ */
+ assert(((unsigned long long)plat_params_from_bl2) ==
+ BRCM_BL31_PLAT_PARAM_VAL);
+
+ /*
+ * Check params passed from BL2 should not be NULL
+ */
+ bl_params_t *params_from_bl2 = (bl_params_t *)from_bl2;
+
+ assert(params_from_bl2 != NULL);
+ assert(params_from_bl2->h.type == PARAM_BL_PARAMS);
+ assert(params_from_bl2->h.version >= VERSION_2);
+
+ bl_params_node_t *bl_params = params_from_bl2->head;
+
+ /*
+ * Copy BL33 and BL32 (if present), entry point information.
+ * They are stored in Secure RAM, in BL2's address space.
+ */
+ while (bl_params != NULL) {
+ if (bl_params->image_id == BL32_IMAGE_ID &&
+ bl_params->image_info->h.attr != IMAGE_ATTRIB_SKIP_LOADING)
+ bl32_image_ep_info = *bl_params->ep_info;
+
+ if (bl_params->image_id == BL33_IMAGE_ID)
+ bl33_image_ep_info = *bl_params->ep_info;
+
+ bl_params = bl_params->next_params_info;
+ }
+
+ if (bl33_image_ep_info.pc == 0U)
+ panic();
+#endif /* RESET_TO_BL31 */
+
+#ifdef BL33_SHARED_DDR_BASE
+ /* Pass information to BL33 thorugh x0 */
+ bl33_image_ep_info.args.arg0 = (u_register_t)BL33_SHARED_DDR_BASE;
+ bl33_image_ep_info.args.arg1 = 0ULL;
+ bl33_image_ep_info.args.arg2 = 0ULL;
+ bl33_image_ep_info.args.arg3 = 0ULL;
+#endif
+}
+
+void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
+ u_register_t arg2, u_register_t arg3)
+{
+#ifdef BL31_LOG_LEVEL
+ SET_LOG_LEVEL(BL31_LOG_LEVEL);
+#endif
+
+ brcm_bl31_early_platform_setup((void *)arg0, arg1, arg2, (void *)arg3);
+
+ plat_bcm_bl31_early_platform_setup((void *)arg0, (void *)arg3);
+
+#ifdef DRIVER_CC_ENABLE
+ /*
+ * Initialize Interconnect for this cluster during cold boot.
+ * No need for locks as no other CPU is active.
+ */
+ plat_brcm_interconnect_init();
+
+ /*
+ * Enable Interconnect coherency for the primary CPU's cluster.
+ * Earlier bootloader stages might already do this (e.g. Trusted
+ * Firmware's BL1 does it) but we can't assume so. There is no harm in
+ * executing this code twice anyway.
+ * Platform specific PSCI code will enable coherency for other
+ * clusters.
+ */
+ plat_brcm_interconnect_enter_coherency();
+#endif
+}
+
+/*******************************************************************************
+ * Perform any BL31 platform setup common to ARM standard platforms
+ ******************************************************************************/
+void brcm_bl31_platform_setup(void)
+{
+ /* Initialize the GIC driver, cpu and distributor interfaces */
+ plat_brcm_gic_driver_init();
+ plat_brcm_gic_init();
+
+ /* Initialize power controller before setting up topology */
+ plat_brcm_pwrc_setup();
+}
+
+/*******************************************************************************
+ * Perform any BL31 platform runtime setup prior to BL31 exit common to ARM
+ * standard platforms
+ * Perform BL31 platform setup
+ ******************************************************************************/
+void brcm_bl31_plat_runtime_setup(void)
+{
+ console_switch_state(CONSOLE_FLAG_RUNTIME);
+
+ /* Initialize the runtime console */
+ bcm_console_runtime_init();
+}
+
+void bl31_platform_setup(void)
+{
+ brcm_bl31_platform_setup();
+
+ /* Initialize the secure environment */
+ plat_brcm_security_setup();
+}
+
+void bl31_plat_runtime_setup(void)
+{
+ brcm_bl31_plat_runtime_setup();
+}
+
+/*******************************************************************************
+ * Perform the very early platform specific architectural setup shared between
+ * ARM standard platforms. This only does basic initialization. Later
+ * architectural setup (bl31_arch_setup()) does not do anything platform
+ * specific.
+ ******************************************************************************/
+void __init brcm_bl31_plat_arch_setup(void)
+{
+#ifndef MMU_DISABLED
+ const mmap_region_t bl_regions[] = {
+ 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),
+#if USE_COHERENT_MEM
+ MAP_REGION_FLAT(BL_COHERENT_RAM_BASE,
+ BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE,
+ MT_DEVICE | MT_RW | MT_SECURE),
+#endif
+ {0}
+ };
+
+ setup_page_tables(bl_regions, plat_brcm_get_mmap());
+
+ enable_mmu_el3(0);
+#endif
+}
+
+void __init bl31_plat_arch_setup(void)
+{
+ brcm_bl31_plat_arch_setup();
+}