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85xx: Added support for multicore boot mechanism

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Added the cpu command that provides a generic mechanism to get status,
reset, and release secondary cores in multicore processors.

Added support for using the ePAPR defined spin-table mechanism on 85xx.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2008-01-17 16:48:33 -06:00 • committed by Andrew Fleming-AFLEMING
parent f69766e4b5
commit ec2b74ffd3
10 changed files with 513 additions and 0 deletions
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96
common/cmd_mp.c Normal file
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/*
* Copyright 2008 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
int
cpu_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
unsigned long cpuid, val = 0;
if (argc < 3) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
cpuid = simple_strtoul(argv[1], NULL, 10);
if (cpuid >= CONFIG_NR_CPUS) {
printf ("Core num: %d is out of range[0..%d]\n",
cpuid, CONFIG_NR_CPUS - 1);
return 1;
}
if (argc == 3) {
if (strncmp(argv[2], "reset", 5) == 0) {
cpu_reset(cpuid);
} else if (strncmp(argv[2], "status", 6) == 0) {
cpu_status(cpuid);
} else {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
return 0;
}
/* 4 or greater, make sure its release */
if (strncmp(argv[2], "release", 7) != 0) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
val = simple_strtoul(argv[3], NULL, 16);
if (cpu_release(cpuid, val, argc - 4, argv + 4)) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
return 0;
}
#ifdef CONFIG_PPC
#define CPU_ARCH_HELP \
" [args] : <pir> <r3> <r4> <r6> <r7>\n" \
" pir - processor id (if writeable)\n" \
" r3 - value for gpr 3\n" \
" r4 - value for gpr 4\n" \
" r6 - value for gpr 6\n" \
" r7 - value for gpr 7\n" \
"\n" \
" Use '-' for any arg if you want the default value.\n" \
" Default for r3, r4, r7 is 0, r6 is 0x65504150\n" \
"\n" \
" When cpu <num> is released r5 = 0 per the ePAPR spec.\n"
#endif
U_BOOT_CMD(
cpu, CFG_MAXARGS, 1, cpu_cmd,
"cpu - Multiprocessor CPU boot manipulation and release\n",
"<num> reset - Reset cpu <num>\n"
"cpu <num> status - Status of cpu <num>\n"
"cpu <num> release <addr> [args] - Release cpu <num> at <addr> with [args]\n"
#ifdef CPU_ARCH_HELP
CPU_ARCH_HELP
#endif
);