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platform: Remove the ipi_sync method from all platforms.

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OpenSBI manages outstanding TLB flush requests by queueing
them in a fifo synchronously. An ipi sync which uses an
atomic operation on MMIO address is no longer required.

Remove the ipi sync method from platform header and all usage.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Atish Patra
2019-08-14 18:02:15 -07:00
committed by Anup Patel
parent 897a97a6af
commit 75229705a0
8 changed files with 0 additions and 53 deletions
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23
lib/utils/sys/clint.c
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@@ -25,29 +25,6 @@ void clint_ipi_send(u32 target_hart)
writel(1, &clint_ipi[target_hart]);
}
void clint_ipi_sync(u32 target_hart)
{
u32 target_ipi, incoming_ipi;
u32 source_hart = sbi_current_hartid();
if (clint_ipi_hart_count <= target_hart)
return;
/* Wait until target HART has handled IPI */
incoming_ipi = 0;
while (1) {
target_ipi = readl(&clint_ipi[target_hart]);
if (!target_ipi)
break;
incoming_ipi |=
atomic_raw_xchg_uint(&clint_ipi[source_hart], 0);
}
if (incoming_ipi)
writel(incoming_ipi, &clint_ipi[source_hart]);
}
void clint_ipi_clear(u32 target_hart)
{
if (clint_ipi_hart_count <= target_hart)