89 строки
2.0 KiB
C
89 строки
2.0 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2007 MIPS Technologies, Inc. All rights reserved.
|
|
* Copyright (C) 2013 Imagination Technologies Ltd.
|
|
*
|
|
* Arbitrary Monitor Interface
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <asm/addrspace.h>
|
|
#include <asm/mipsmtregs.h>
|
|
#include <asm/mips-boards/launch.h>
|
|
#include <asm/vpe.h>
|
|
|
|
int amon_cpu_avail(int cpu)
|
|
{
|
|
struct cpulaunch *launch = (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH);
|
|
|
|
if (cpu < 0 || cpu >= NCPULAUNCH) {
|
|
pr_debug("avail: cpu%d is out of range\n", cpu);
|
|
return 0;
|
|
}
|
|
|
|
launch += cpu;
|
|
if (!(launch->flags & LAUNCH_FREADY)) {
|
|
pr_debug("avail: cpu%d is not ready\n", cpu);
|
|
return 0;
|
|
}
|
|
if (launch->flags & (LAUNCH_FGO|LAUNCH_FGONE)) {
|
|
pr_debug("avail: too late.. cpu%d is already gone\n", cpu);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int amon_cpu_start(int cpu,
|
|
unsigned long pc, unsigned long sp,
|
|
unsigned long gp, unsigned long a0)
|
|
{
|
|
volatile struct cpulaunch *launch =
|
|
(struct cpulaunch *)CKSEG0ADDR(CPULAUNCH);
|
|
|
|
if (!amon_cpu_avail(cpu))
|
|
return -1;
|
|
if (cpu == smp_processor_id()) {
|
|
pr_debug("launch: I am cpu%d!\n", cpu);
|
|
return -1;
|
|
}
|
|
launch += cpu;
|
|
|
|
pr_debug("launch: starting cpu%d\n", cpu);
|
|
|
|
launch->pc = pc;
|
|
launch->gp = gp;
|
|
launch->sp = sp;
|
|
launch->a0 = a0;
|
|
|
|
smp_wmb(); /* Target must see parameters before go */
|
|
launch->flags |= LAUNCH_FGO;
|
|
smp_wmb(); /* Target must see go before we poll */
|
|
|
|
while ((launch->flags & LAUNCH_FGONE) == 0)
|
|
;
|
|
smp_rmb(); /* Target will be updating flags soon */
|
|
pr_debug("launch: cpu%d gone!\n", cpu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_MIPS_VPE_LOADER_CMP
|
|
int vpe_run(struct vpe *v)
|
|
{
|
|
struct vpe_notifications *n;
|
|
|
|
if (amon_cpu_start(aprp_cpu_index(), v->__start, 0, 0, 0) < 0)
|
|
return -1;
|
|
|
|
list_for_each_entry(n, &v->notify, list)
|
|
n->start(VPE_MODULE_MINOR);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|