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/*-
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/smp.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/cpu.h>
#include <machine/smp.h>
#include <machine/fdt.h>
#include <machine/intr.h>
#define SCU_PHYSBASE 0xFFFEC000
#define SCU_SIZE 0x100
#define SCU_CONTROL_REG 0x00
#define SCU_CONTROL_ENABLE (1 << 0)
#define SCU_CONFIG_REG 0x04
#define SCU_CONFIG_REG_NCPU_MASK 0x03
#define SCU_CPUPOWER_REG 0x08
#define SCU_INV_TAGS_REG 0x0c
#define SCU_DIAG_CONTROL 0x30
#define SCU_DIAG_DISABLE_MIGBIT (1 << 0)
#define SCU_FILTER_START_REG 0x40
#define SCU_FILTER_END_REG 0x44
#define SCU_SECURE_ACCESS_REG 0x50
#define SCU_NONSECURE_ACCESS_REG 0x54
#define RSTMGR_PHYSBASE 0xFFD05000
#define RSTMGR_SIZE 0x100
#define MPUMODRST 0x10
#define MPUMODRST_CPU1 (1 << 1)
#define RAM_PHYSBASE 0x0
#define RAM_SIZE 0x1000
extern char *mpentry_addr;
static void socfpga_trampoline(void);
static void
socfpga_trampoline(void)
{
__asm __volatile(
"ldr pc, 1f\n"
".globl mpentry_addr\n"
"mpentry_addr:\n"
"1: .space 4\n");
}
void
platform_mp_setmaxid(void)
{
int hwcpu, ncpu;
/* If we've already set this don't bother to do it again. */
if (mp_ncpus != 0)
return;
hwcpu = 2;
ncpu = hwcpu;
TUNABLE_INT_FETCH("hw.ncpu", &ncpu);
if (ncpu < 1 || ncpu > hwcpu)
ncpu = hwcpu;
mp_ncpus = ncpu;
mp_maxid = ncpu - 1;
}
void
platform_mp_start_ap(void)
{
bus_space_handle_t scu, rst, ram;
int reg;
if (bus_space_map(fdtbus_bs_tag, SCU_PHYSBASE,
SCU_SIZE, 0, &scu) != 0)
panic("Couldn't map the SCU\n");
if (bus_space_map(fdtbus_bs_tag, RSTMGR_PHYSBASE,
RSTMGR_SIZE, 0, &rst) != 0)
panic("Couldn't map the reset manager (RSTMGR)\n");
if (bus_space_map(fdtbus_bs_tag, RAM_PHYSBASE,
RAM_SIZE, 0, &ram) != 0)
panic("Couldn't map the first physram page\n");
/* Invalidate SCU cache tags */
bus_space_write_4(fdtbus_bs_tag, scu,
SCU_INV_TAGS_REG, 0x0000ffff);
/*
* Erratum ARM/MP: 764369 (problems with cache maintenance).
* Setting the "disable-migratory bit" in the undocumented SCU
* Diagnostic Control Register helps work around the problem.
*/
reg = bus_space_read_4(fdtbus_bs_tag, scu, SCU_DIAG_CONTROL);
reg |= (SCU_DIAG_DISABLE_MIGBIT);
bus_space_write_4(fdtbus_bs_tag, scu, SCU_DIAG_CONTROL, reg);
/* Put CPU1 to reset state */
bus_space_write_4(fdtbus_bs_tag, rst, MPUMODRST, MPUMODRST_CPU1);
/* Enable the SCU, then clean the cache on this core */
reg = bus_space_read_4(fdtbus_bs_tag, scu, SCU_CONTROL_REG);
reg |= (SCU_CONTROL_ENABLE);
bus_space_write_4(fdtbus_bs_tag, scu, SCU_CONTROL_REG, reg);
/* Set up trampoline code */
mpentry_addr = (char *)pmap_kextract((vm_offset_t)mpentry);
bus_space_write_region_4(fdtbus_bs_tag, ram, 0,
(uint32_t *)&socfpga_trampoline, 8);
dcache_wbinv_poc_all();
/* Put CPU1 out from reset */
bus_space_write_4(fdtbus_bs_tag, rst, MPUMODRST, 0);
dsb();
sev();
bus_space_unmap(fdtbus_bs_tag, scu, SCU_SIZE);
bus_space_unmap(fdtbus_bs_tag, rst, RSTMGR_SIZE);
bus_space_unmap(fdtbus_bs_tag, ram, RAM_SIZE);
}
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