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-rw-r--r--bl2u/aarch32/bl2u_entrypoint.S127
-rw-r--r--bl2u/aarch64/bl2u_entrypoint.S129
-rw-r--r--bl2u/bl2u.ld.S118
-rw-r--r--bl2u/bl2u.mk15
-rw-r--r--bl2u/bl2u_main.c65
5 files changed, 454 insertions, 0 deletions
diff --git a/bl2u/aarch32/bl2u_entrypoint.S b/bl2u/aarch32/bl2u_entrypoint.S
new file mode 100644
index 0000000..1063789
--- /dev/null
+++ b/bl2u/aarch32/bl2u_entrypoint.S
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2016-2022, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <common/bl_common.h>
+
+ .globl bl2u_vector_table
+ .globl bl2u_entrypoint
+
+
+vector_base bl2u_vector_table
+ b bl2u_entrypoint
+ b report_exception /* Undef */
+ b report_exception /* SVC call */
+ b report_prefetch_abort /* Prefetch abort */
+ b report_data_abort /* Data abort */
+ b report_exception /* Reserved */
+ b report_exception /* IRQ */
+ b report_exception /* FIQ */
+
+
+func bl2u_entrypoint
+ /*---------------------------------------------
+ * Save from r1 the extents of the trusted ram
+ * available to BL2U for future use.
+ * r0 is not currently used.
+ * ---------------------------------------------
+ */
+ mov r11, r1
+ mov r10, r2
+
+ /* ---------------------------------------------
+ * Set the exception vector to something sane.
+ * ---------------------------------------------
+ */
+ ldr r0, =bl2u_vector_table
+ stcopr r0, VBAR
+ isb
+
+ /* --------------------------------------------------------
+ * Enable the instruction cache - disable speculative loads
+ * --------------------------------------------------------
+ */
+ ldcopr r0, SCTLR
+ orr r0, r0, #SCTLR_I_BIT
+ bic r0, r0, #SCTLR_DSSBS_BIT
+ stcopr r0, SCTLR
+ isb
+
+ /* ---------------------------------------------
+ * Since BL2U executes after BL1, it is assumed
+ * here that BL1 has already has done the
+ * necessary register initializations.
+ * ---------------------------------------------
+ */
+
+ /* ---------------------------------------------
+ * Invalidate the RW memory used by the BL2U
+ * image. This includes the data and NOBITS
+ * sections. This is done to safeguard against
+ * possible corruption of this memory by dirty
+ * cache lines in a system cache as a result of
+ * use by an earlier boot loader stage.
+ * ---------------------------------------------
+ */
+ ldr r0, =__RW_START__
+ ldr r1, =__RW_END__
+ sub r1, r1, r0
+ bl inv_dcache_range
+
+ /* ---------------------------------------------
+ * Zero out NOBITS sections. There are 2 of them:
+ * - the .bss section;
+ * - the coherent memory section.
+ * ---------------------------------------------
+ */
+ ldr r0, =__BSS_START__
+ ldr r1, =__BSS_END__
+ sub r1, r1, r0
+ bl zeromem
+
+ /* --------------------------------------------
+ * Allocate a stack whose memory will be marked
+ * as Normal-IS-WBWA when the MMU is enabled.
+ * There is no risk of reading stale stack
+ * memory after enabling the MMU as only the
+ * primary cpu is running at the moment.
+ * --------------------------------------------
+ */
+ bl plat_set_my_stack
+
+ /* ---------------------------------------------
+ * Initialize the stack protector canary before
+ * any C code is called.
+ * ---------------------------------------------
+ */
+#if STACK_PROTECTOR_ENABLED
+ bl update_stack_protector_canary
+#endif
+
+ /* ---------------------------------------------
+ * Perform early platform setup & platform
+ * specific early arch. setup e.g. mmu setup
+ * ---------------------------------------------
+ */
+ mov r0, r11
+ mov r1, r10
+ bl bl2u_early_platform_setup
+ bl bl2u_plat_arch_setup
+
+ /* ---------------------------------------------
+ * Jump to main function.
+ * ---------------------------------------------
+ */
+ bl bl2u_main
+
+ /* ---------------------------------------------
+ * Should never reach this point.
+ * ---------------------------------------------
+ */
+ no_ret plat_panic_handler
+
+endfunc bl2u_entrypoint
diff --git a/bl2u/aarch64/bl2u_entrypoint.S b/bl2u/aarch64/bl2u_entrypoint.S
new file mode 100644
index 0000000..15978b6
--- /dev/null
+++ b/bl2u/aarch64/bl2u_entrypoint.S
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <common/bl_common.h>
+
+ .globl bl2u_entrypoint
+
+
+func bl2u_entrypoint
+ /*---------------------------------------------
+ * Store the extents of the tzram available to
+ * BL2U and other platform specific information
+ * for future use. x0 is currently not used.
+ * ---------------------------------------------
+ */
+ mov x20, x1
+ mov x21, x2
+
+ /* ---------------------------------------------
+ * Set the exception vector to something sane.
+ * ---------------------------------------------
+ */
+ adr x0, early_exceptions
+ msr vbar_el1, x0
+ isb
+
+ /* ---------------------------------------------
+ * Enable the SError interrupt now that the
+ * exception vectors have been setup.
+ * ---------------------------------------------
+ */
+ msr daifclr, #DAIF_ABT_BIT
+
+ /* ---------------------------------------------
+ * Enable the instruction cache, stack pointer
+ * and data access alignment checks and disable
+ * speculative loads.
+ * ---------------------------------------------
+ */
+ mov x1, #(SCTLR_I_BIT | SCTLR_A_BIT | SCTLR_SA_BIT)
+ mrs x0, sctlr_el1
+ orr x0, x0, x1
+ bic x0, x0, #SCTLR_DSSBS_BIT
+ msr sctlr_el1, x0
+ isb
+
+ /* ---------------------------------------------
+ * Invalidate the RW memory used by the BL2U
+ * image. This includes the data and NOBITS
+ * sections. This is done to safeguard against
+ * possible corruption of this memory by dirty
+ * cache lines in a system cache as a result of
+ * use by an earlier boot loader stage.
+ * ---------------------------------------------
+ */
+ adr x0, __RW_START__
+ adr x1, __RW_END__
+ sub x1, x1, x0
+ bl inv_dcache_range
+
+ /* ---------------------------------------------
+ * Zero out NOBITS sections. There are 2 of them:
+ * - the .bss section;
+ * - the coherent memory section.
+ * ---------------------------------------------
+ */
+ adrp x0, __BSS_START__
+ add x0, x0, :lo12:__BSS_START__
+ adrp x1, __BSS_END__
+ add x1, x1, :lo12:__BSS_END__
+ sub x1, x1, x0
+ bl zeromem
+
+ /* --------------------------------------------
+ * Allocate a stack whose memory will be marked
+ * as Normal-IS-WBWA when the MMU is enabled.
+ * There is no risk of reading stale stack
+ * memory after enabling the MMU as only the
+ * primary cpu is running at the moment.
+ * --------------------------------------------
+ */
+ bl plat_set_my_stack
+
+ /* ---------------------------------------------
+ * Initialize the stack protector canary before
+ * any C code is called.
+ * ---------------------------------------------
+ */
+#if STACK_PROTECTOR_ENABLED
+ bl update_stack_protector_canary
+#endif
+
+ /* ---------------------------------------------
+ * Perform early platform setup & platform
+ * specific early arch. setup e.g. mmu setup
+ * ---------------------------------------------
+ */
+ mov x0, x20
+ mov x1, x21
+ bl bl2u_early_platform_setup
+ bl bl2u_plat_arch_setup
+
+#if ENABLE_PAUTH
+ /* ---------------------------------------------
+ * Program APIAKey_EL1
+ * and enable pointer authentication.
+ * ---------------------------------------------
+ */
+ bl pauth_init_enable_el1
+#endif
+
+ /* ---------------------------------------------
+ * Jump to bl2u_main function.
+ * ---------------------------------------------
+ */
+ bl bl2u_main
+
+ /* ---------------------------------------------
+ * Should never reach this point.
+ * ---------------------------------------------
+ */
+ no_ret plat_panic_handler
+
+endfunc bl2u_entrypoint
diff --git a/bl2u/bl2u.ld.S b/bl2u/bl2u.ld.S
new file mode 100644
index 0000000..a7752a4
--- /dev/null
+++ b/bl2u/bl2u.ld.S
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <platform_def.h>
+
+#include <common/bl_common.ld.h>
+#include <lib/xlat_tables/xlat_tables_defs.h>
+
+OUTPUT_FORMAT(PLATFORM_LINKER_FORMAT)
+OUTPUT_ARCH(PLATFORM_LINKER_ARCH)
+ENTRY(bl2u_entrypoint)
+
+MEMORY {
+ RAM (rwx): ORIGIN = BL2U_BASE, LENGTH = BL2U_LIMIT - BL2U_BASE
+}
+
+
+SECTIONS
+{
+ . = BL2U_BASE;
+ ASSERT(. == ALIGN(PAGE_SIZE),
+ "BL2U_BASE address is not aligned on a page boundary.")
+
+#if SEPARATE_CODE_AND_RODATA
+ .text . : {
+ __TEXT_START__ = .;
+ *bl2u_entrypoint.o(.text*)
+ *(SORT_BY_ALIGNMENT(.text*))
+ *(.vectors)
+ . = ALIGN(PAGE_SIZE);
+ __TEXT_END__ = .;
+ } >RAM
+
+ /* .ARM.extab and .ARM.exidx are only added because Clang need them */
+ .ARM.extab . : {
+ *(.ARM.extab* .gnu.linkonce.armextab.*)
+ } >RAM
+
+ .ARM.exidx . : {
+ *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+ } >RAM
+
+ .rodata . : {
+ __RODATA_START__ = .;
+ *(SORT_BY_ALIGNMENT(.rodata*))
+
+ RODATA_COMMON
+
+ . = ALIGN(PAGE_SIZE);
+ __RODATA_END__ = .;
+ } >RAM
+#else
+ ro . : {
+ __RO_START__ = .;
+ *bl2u_entrypoint.o(.text*)
+ *(SORT_BY_ALIGNMENT(.text*))
+ *(SORT_BY_ALIGNMENT(.rodata*))
+
+ RODATA_COMMON
+
+ *(.vectors)
+ __RO_END_UNALIGNED__ = .;
+ /*
+ * Memory page(s) mapped to this section will be marked as
+ * read-only, executable. No RW data from the next section must
+ * creep in. Ensure the rest of the current memory page is unused.
+ */
+ . = ALIGN(PAGE_SIZE);
+ __RO_END__ = .;
+ } >RAM
+#endif
+
+ /*
+ * Define a linker symbol to mark start of the RW memory area for this
+ * image.
+ */
+ __RW_START__ = . ;
+
+ DATA_SECTION >RAM
+ STACK_SECTION >RAM
+ BSS_SECTION >RAM
+ XLAT_TABLE_SECTION >RAM
+
+#if USE_COHERENT_MEM
+ /*
+ * The base address of the coherent memory section must be page-aligned (4K)
+ * to guarantee that the coherent data are stored on their own pages and
+ * are not mixed with normal data. This is required to set up the correct
+ * memory attributes for the coherent data page tables.
+ */
+ coherent_ram (NOLOAD) : ALIGN(PAGE_SIZE) {
+ __COHERENT_RAM_START__ = .;
+ *(tzfw_coherent_mem)
+ __COHERENT_RAM_END_UNALIGNED__ = .;
+ /*
+ * Memory page(s) mapped to this section will be marked
+ * as device memory. No other unexpected data must creep in.
+ * Ensure the rest of the current memory page is unused.
+ */
+ . = ALIGN(PAGE_SIZE);
+ __COHERENT_RAM_END__ = .;
+ } >RAM
+#endif
+
+ /*
+ * Define a linker symbol to mark end of the RW memory area for this
+ * image.
+ */
+ __RW_END__ = .;
+ __BL2U_END__ = .;
+
+ __BSS_SIZE__ = SIZEOF(.bss);
+
+ ASSERT(. <= BL2U_LIMIT, "BL2U image has exceeded its limit.")
+}
diff --git a/bl2u/bl2u.mk b/bl2u/bl2u.mk
new file mode 100644
index 0000000..b4d7634
--- /dev/null
+++ b/bl2u/bl2u.mk
@@ -0,0 +1,15 @@
+#
+# Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+BL2U_SOURCES += bl2u/bl2u_main.c \
+ bl2u/${ARCH}/bl2u_entrypoint.S \
+ plat/common/${ARCH}/platform_up_stack.S
+
+ifeq (${ARCH},aarch64)
+BL2U_SOURCES += common/aarch64/early_exceptions.S
+endif
+
+BL2U_LINKERFILE := bl2u/bl2u.ld.S
diff --git a/bl2u/bl2u_main.c b/bl2u/bl2u_main.c
new file mode 100644
index 0000000..fcb73b9
--- /dev/null
+++ b/bl2u/bl2u_main.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <stdint.h>
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <bl1/bl1.h>
+#include <bl2u/bl2u.h>
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <drivers/auth/auth_mod.h>
+#include <drivers/console.h>
+#include <plat/common/platform.h>
+
+/*******************************************************************************
+ * This function is responsible to:
+ * Load SCP_BL2U if platform has defined SCP_BL2U_BASE
+ * Perform platform setup.
+ * Go back to EL3.
+ ******************************************************************************/
+void bl2u_main(void)
+{
+ NOTICE("BL2U: %s\n", version_string);
+ NOTICE("BL2U: %s\n", build_message);
+
+#if SCP_BL2U_BASE
+ int rc;
+ /* Load the subsequent bootloader images */
+ rc = bl2u_plat_handle_scp_bl2u();
+ if (rc != 0) {
+ ERROR("Failed to load SCP_BL2U (%i)\n", rc);
+ panic();
+ }
+#endif
+
+ /* Perform platform setup in BL2U after loading SCP_BL2U */
+ bl2u_platform_setup();
+
+ console_flush();
+
+#ifndef __aarch64__
+ /*
+ * For AArch32 state BL1 and BL2U share the MMU setup.
+ * Given that BL2U does not map BL1 regions, MMU needs
+ * to be disabled in order to go back to BL1.
+ */
+ disable_mmu_icache_secure();
+#endif /* !__aarch64__ */
+
+ /*
+ * Indicate that BL2U is done and resume back to
+ * normal world via an SMC to BL1.
+ * x1 could be passed to Normal world,
+ * so DO NOT pass any secret information.
+ */
+ smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0);
+ wfi();
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 12:01:30 +0000