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lib: sbi: Simplify halt broadcast logic

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Use the IPI .update callback to exclude the local hart. This allows
reusing the normal logic for broadcasting an IPI to all active harts.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Samuel Holland
2024-08-30 08:49:11 -07:00
committed by Anup Patel
parent 633e7cbd50
commit 97b8038916
2 changed files with 11 additions and 10 deletions
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11
lib/sbi/sbi_system.c
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@@ -65,20 +65,11 @@ bool sbi_system_reset_supported(u32 reset_type, u32 reset_reason)
void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason)
{
ulong hbase = 0, hmask;
u32 cur_hartid = current_hartid();
struct sbi_domain *dom = sbi_domain_thishart_ptr();
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
/* Send HALT IPI to every hart other than the current hart */
while (!sbi_hsm_hart_interruptible_mask(dom, hbase, &hmask)) {
if ((hbase <= cur_hartid)
&& (cur_hartid < hbase + BITS_PER_LONG))
hmask &= ~(1UL << (cur_hartid - hbase));
if (hmask)
sbi_ipi_send_halt(hmask, hbase);
hbase += BITS_PER_LONG;
}
sbi_ipi_send_halt(0, -1UL);
/* Stop current HART */
sbi_hsm_hart_stop(scratch, false);