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.section ".text.boot"
.global _start
_start:
// Stop all cores except one.
mrs x0, mpidr_el1
and x0, x0, #0xFF
cbz x0, master
b halt
// Helper function to clear x1 bytes starting at the x0 memory address.
.globl memzero64
memzero64:
mov x2, x1
lsr x2, x2, #3
cbz x2, memzero64_ret
memzero64_loop:
str xzr, [x0], #8
subs x2, x2, #1
b.gt memzero64_loop
memzero64_ret:
ret
// Helper function wait for N cycles before returning.
.globl delay
delay:
subs x0, x0, #1
bne delay
ret
master:
// Set the stack memory location. Since the stack grows towards zero we set
// the stack pointer to the end of the .stack memory section.
ldr x0, =__stack_end
mov sp, x0
// Start C code, should not return.
bl main
b halt
halt:
wfe
b halt
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