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host_event_commands: Fix lpc_get_next_host_event for 64-bit events

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__builtin_ffs takes an int as argument, and, therefore, does not
find bits >= 32. Fix this up when CONFIG_HOST_EVENT64.

BUG=b:69329196
BRANCH=fizz,poppy
TEST=Patch coreboot to add bit 33 in SCI mask, add EC code to send
     such events, EC does not watchdog anymore

Change-Id: If868095f19fe1940b4f5924cf669a719f9535991
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/989514
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
This commit is contained in:
Nicolas Boichat
2018-04-02 09:39:39 +08:00
committed by chrome-bot
parent aac3da46a0
commit da1b429c79
1 changed files with 9 additions and 0 deletions
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9
common/host_event_commands.c
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@@ -137,6 +137,15 @@ int lpc_get_next_host_event(void)
host_event_t ev;
int evt_idx = __builtin_ffs(lpc_host_events);
#ifdef CONFIG_HOST_EVENT64
if (evt_idx == 0) {
int evt_idx_high = __builtin_ffs(lpc_host_events >> 32);
if (evt_idx_high)
evt_idx = 32 + evt_idx_high;
}
#endif
if (evt_idx) {
host_event_set_bit(&ev, evt_idx);
host_clear_events(ev);