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# qemu -kernel loads the kernel at 0x80000000
# and causes each CPU to jump there.
# kernel.ld causes the following code to
# be placed at 0x80000000.
.section .text
_entry:
# set up a stack for C.
# stack0 is declared in start.c,
# with a 4096-byte stack per CPU.
# sp = stack0 + (hartid * 4096)
la sp, stack0
li a0, 1024*4
csrr a1, mhartid
addi a1, a1, 1
addi t0, a1, 0
addi t1, a0, 0
mul:
add a0, a0, t1
addi t0, t0, -1
bne t0, zero, mul
add sp, sp, a0
# jump to start() in start.c
call start
spin:
j spin
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