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/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* System hooks for Chrome EC */
#include "hooks.h"
#include "uart.h"
#include "util.h"
/* Hooks are described in special sections */
extern const struct hook_data __hooks_init[];
extern const struct hook_data __hooks_init_end[];
extern const struct hook_data __hooks_freq_change[];
extern const struct hook_data __hooks_freq_change_end[];
int hook_notify(enum hook_type type, int stop_on_error)
{
const struct hook_data *start, *end, *p;
int count, called = 0;
int last_prio = HOOK_PRIO_FIRST - 1, prio;
int rv_error = EC_SUCCESS, rv;
/* Get the start and end pointers for the hook type */
switch (type) {
case HOOK_INIT:
start = __hooks_init;
end = __hooks_init_end;
break;
case HOOK_FREQ_CHANGE:
start = __hooks_freq_change;
end = __hooks_freq_change_end;
break;
default:
/* Unhandled hook type */
return EC_ERROR_UNKNOWN;
}
count = ((uint32_t)end - (uint32_t)start) / sizeof(struct hook_data);
/* Call all the hooks in priority order */
while (called < count) {
/* Find the lowest remaining priority */
for (p = start, prio = HOOK_PRIO_LAST + 1; p < end; p++) {
if (p->priority < prio && p->priority > last_prio)
prio = p->priority;
}
last_prio = prio;
/* Call all the hooks with that priority */
for (p = start; p < end; p++) {
if (p->priority == prio) {
called++;
rv = p->routine();
if (rv != EC_SUCCESS) {
if (stop_on_error)
return rv;
else if (rv_error == EC_SUCCESS)
rv_error = rv;
}
}
}
}
/* Return the first error seen, if any */
return rv_error;
}
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