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https://github.com/fergalmoran/ladybird.git
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547322fb95
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.
49 lines
1000 B
ArmAsm
49 lines
1000 B
ArmAsm
/*
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* Copyright (c) 2021, Nico Weber <thakis@chromium.org>
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* Copyright (c) 2021, Marcin Undak <mcinek@gmail.com>
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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.global wait_cycles
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.type wait_cycles, @function
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wait_cycles:
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Lstart:
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// This is probably too fast when caching and branch prediction is turned on.
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// FIXME: Make timer-based.
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subs x0, x0, #1
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bne Lstart
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ret
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.global enter_el2_from_el3
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.type enter_el2_from_el3, @function
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enter_el2_from_el3:
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adr x0, entered_el2
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msr elr_el3, x0
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eret
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entered_el2:
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ret
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.global enter_el1_from_el2
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.type enter_el1_from_el2, @function
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enter_el1_from_el2:
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adr x0, entered_el1
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msr elr_el2, x0
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eret
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entered_el1:
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ret
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//
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// Installs the EL1 vector table
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// Args:
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// x0 - Address of vector table
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//
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// This function doesn't return a value
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//
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.global el1_vector_table_install
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.type el1_vector_table_install, @function
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el1_vector_table_install:
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msr VBAR_EL1, x0
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ret
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