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/*-
* Copyright (c) 2014 Ganbold Tsagaankhuu <ganbold@freebsd.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/smp.h>
#include <machine/fdt.h>
#include <machine/intr.h>
#define SCU_PHYSBASE 0x1013c000
#define SCU_SIZE 0x100
#define SCU_CONTROL_REG 0x00
#define SCU_CONTROL_ENABLE (1 << 0)
#define SCU_STANDBY_EN (1 << 5)
#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_FILTER_START_REG 0x10
#define SCU_FILTER_END_REG 0x14
#define SCU_SECURE_ACCESS_REG 0x18
#define SCU_NONSECURE_ACCESS_REG 0x1c
#define IMEM_PHYSBASE 0x10080000
#define IMEM_SIZE 0x20
#define PMU_PHYSBASE 0x20004000
#define PMU_SIZE 0x100
#define PMU_PWRDN_CON 0x08
#define PMU_PWRDN_SCU (1 << 4)
extern char *mpentry_addr;
static void rk30xx_boot2(void);
static void
rk30xx_boot2(void)
{
__asm __volatile(
"ldr pc, 1f\n"
".globl mpentry_addr\n"
"mpentry_addr:\n"
"1: .space 4\n");
}
void
platform_mp_init_secondary(void)
{
intr_pic_init_secondary();
}
void
platform_mp_setmaxid(void)
{
bus_space_handle_t scu;
int ncpu;
uint32_t val;
if (mp_ncpus != 0)
return;
if (bus_space_map(fdtbus_bs_tag, SCU_PHYSBASE, SCU_SIZE, 0, &scu) != 0)
panic("Could not map the SCU");
val = bus_space_read_4(fdtbus_bs_tag, scu, SCU_CONFIG_REG);
ncpu = (val & SCU_CONFIG_REG_NCPU_MASK) + 1;
bus_space_unmap(fdtbus_bs_tag, scu, SCU_SIZE);
mp_ncpus = ncpu;
mp_maxid = ncpu - 1;
}
int
platform_mp_probe(void)
{
if (mp_ncpus == 0)
platform_mp_setmaxid();
return (mp_ncpus > 1);
}
void
platform_mp_start_ap(void)
{
bus_space_handle_t scu;
bus_space_handle_t imem;
bus_space_handle_t pmu;
uint32_t val;
int i;
if (bus_space_map(fdtbus_bs_tag, SCU_PHYSBASE, SCU_SIZE, 0, &scu) != 0)
panic("Could not map the SCU");
if (bus_space_map(fdtbus_bs_tag, IMEM_PHYSBASE,
IMEM_SIZE, 0, &imem) != 0)
panic("Could not map the IMEM");
if (bus_space_map(fdtbus_bs_tag, PMU_PHYSBASE, PMU_SIZE, 0, &pmu) != 0)
panic("Could not map the PMU");
/*
* Invalidate SCU cache tags. The 0x0000ffff constant invalidates all
* ways on all cores 0-3. Per the ARM docs, it's harmless to write to
* the bits for cores that are not present.
*/
bus_space_write_4(fdtbus_bs_tag, scu, SCU_INV_TAGS_REG, 0x0000ffff);
/* Make sure all cores except the first are off */
val = bus_space_read_4(fdtbus_bs_tag, pmu, PMU_PWRDN_CON);
for (i = 1; i < mp_ncpus; i++)
val |= 1 << i;
bus_space_write_4(fdtbus_bs_tag, pmu, PMU_PWRDN_CON, val);
/* Enable SCU power domain */
val = bus_space_read_4(fdtbus_bs_tag, pmu, PMU_PWRDN_CON);
val &= ~PMU_PWRDN_SCU;
bus_space_write_4(fdtbus_bs_tag, pmu, PMU_PWRDN_CON, val);
/* Enable SCU */
val = bus_space_read_4(fdtbus_bs_tag, scu, SCU_CONTROL_REG);
bus_space_write_4(fdtbus_bs_tag, scu, SCU_CONTROL_REG,
val | SCU_CONTROL_ENABLE);
/*
* Cores will execute the code which resides at the start of
* the on-chip bootram/sram after power-on. This sram region
* should be reserved and the trampoline code that directs
* the core to the real startup code in ram should be copied
* into this sram region.
*
* First set boot function for the sram code.
*/
mpentry_addr = (char *)pmap_kextract((vm_offset_t)mpentry);
/* Copy trampoline to sram, that runs during startup of the core */
bus_space_write_region_4(fdtbus_bs_tag, imem, 0,
(uint32_t *)&rk30xx_boot2, 8);
cpu_idcache_wbinv_all();
cpu_l2cache_wbinv_all();
/* Start all cores */
val = bus_space_read_4(fdtbus_bs_tag, pmu, PMU_PWRDN_CON);
for (i = 1; i < mp_ncpus; i++)
val &= ~(1 << i);
bus_space_write_4(fdtbus_bs_tag, pmu, PMU_PWRDN_CON, val);
armv7_sev();
bus_space_unmap(fdtbus_bs_tag, scu, SCU_SIZE);
bus_space_unmap(fdtbus_bs_tag, imem, IMEM_SIZE);
bus_space_unmap(fdtbus_bs_tag, pmu, PMU_SIZE);
}
void
platform_ipi_send(cpuset_t cpus, u_int ipi)
{
pic_ipi_send(cpus, ipi);
}
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