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Prekernel: Install EL1 vector table at boot on aarch64

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We now have a function to install a (currently default) vector
table, meaning that any exceptions (or interrupts for that matter)
will be caught by the processor and routed to one of the vectors
inside the table.
This commit is contained in:
Jesse Buhagiar 2021-10-13 22:19:49 +11:00 • committed by Brian Gianforcaro
parent 28e36a70d6
commit 547322fb95
5 changed files with 87 additions and 0 deletions
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8
Kernel/Prekernel/Arch/aarch64/init.cpp
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@ -1,6 +1,7 @@
/*
* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
* Copyright (c) 2021, Marcin Undak <mcinek@gmail.com>
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -45,6 +46,13 @@ extern "C" [[noreturn]] void init()
uart.print_str("Drop CPU to EL1\r\n");
Prekernel::drop_to_exception_level_1();
// Load EL1 vector table
extern uintptr_t vector_table_el1;
el1_vector_table_install(&vector_table_el1);
// Set the register
asm("msr sctlr_el1, %[value]" ::[value] "r"(system_control_register_el1));
uart.print_str("Initialize MMU\r\n");
Prekernel::init_prekernel_page_tables();