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Signed-off-by: EnderIce2 <enderice2@protonmail.com>
50 lines
1.1 KiB
ArmAsm
50 lines
1.1 KiB
ArmAsm
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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.section ".bootstrap.boot", "a"
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.extern _kernel_bss_start
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.extern _kernel_bss_end
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.extern _kernel_bss_size
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.global _start
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_start:
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/* Keep only the main core */
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mrs x1, mpidr_el1
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and x1, x1, #3
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cbz x1, 2f
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/* Halt */
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1: wfe
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b 1b
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/* Initialize the stack */
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2: ldr x1, =_start
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mov sp, x1
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/* Clear the BSS */
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ldr x1, =_kernel_bss_start
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ldr w2, =_kernel_bss_size
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3: cbz w2, 4f
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str xzr, [x1], #8
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sub w2, w2, #1
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cbnz w2, 3b
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/* Start the kernel */
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4: bl _aarch64_start
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b 1b
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