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/*
* Copyright (c) 2013, The Regents of the University of California (Regents).
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Regents nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
* SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
* OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
* HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
#include <arch/barrier.h>
#include <arch/errno.h>
#include <atomic.h>
#include <commonlib/configstring.h>
#include <console/console.h>
#include <mcall.h>
#include <string.h>
#include <vm.h>
int mcalldebug; // set this interactively for copious debug.
uintptr_t mcall_query_memory(uintptr_t id, memory_block_info *info)
{
if (id == 0) {
uintptr_t base;
size_t size;
query_mem(configstring(), &base, &size);
mprv_write_ulong(&info->base, base);
mprv_write_ulong(&info->size, size);
return 0;
}
return -1;
}
uintptr_t mcall_send_ipi(uintptr_t recipient)
{
die("mcall_send_ipi is currently not implemented");
return 0;
}
uintptr_t mcall_clear_ipi(void)
{
// only clear SSIP if no other events are pending
if (HLS()->device_response_queue_head == NULL) {
clear_csr(mip, MIP_SSIP);
/* Ensure the other hart sees it. */
mb();
}
return atomic_swap(&HLS()->ipi_pending, 0);
}
uintptr_t mcall_shutdown(void)
{
die("mcall_shutdown is currently not implemented");
return 0;
}
uintptr_t mcall_set_timer(uint64_t when)
{
uint64_t *timecmp = HLS()->timecmp;
if (mcalldebug)
printk(BIOS_SPEW,
"hart %d: HLS %p: mcall timecmp@%p to 0x%llx\n",
HLS()->hart_id, HLS(), timecmp, when);
*timecmp = when;
clear_csr(mip, MIP_STIP);
set_csr(mie, MIP_MTIP);
return 0;
}
void hls_init(uint32_t hart_id)
{
printk(BIOS_SPEW, "hart %d: HLS is %p\n", hart_id, HLS());
memset(HLS(), 0, sizeof(*HLS()));
HLS()->hart_id = hart_id;
/* Initialize these pointers with dummy values, for now */
HLS()->time = NULL;
HLS()->timecmp = NULL;
printk(BIOS_SPEW, "Time is %p and timecmp is %p\n",
HLS()->time, HLS()->timecmp);
}
uintptr_t mcall_console_putchar(uint8_t ch)
{
do_putchar(ch);
return 0;
}
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