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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <cpu_func.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/printk.h>
#include <linux/psci.h>
#include <linux/sizes.h>
#include <asm/processor.h>
#include <asm/psci.h>
#include <asm/secure.h>
#include <asm/system.h>
#include "../debug.h"
#include "../soc-info.h"
#include "arm-mpcore.h"
#include "cache-uniphier.h"
#define UNIPHIER_SMPCTRL_ROM_RSV2 0x59801208
void uniphier_smp_trampoline(void);
void uniphier_smp_trampoline_end(void);
u32 uniphier_smp_booted[CONFIG_ARMV7_PSCI_NR_CPUS];
static int uniphier_get_nr_cpus(void)
{
switch (uniphier_get_soc_id()) {
case UNIPHIER_PRO4_ID:
case UNIPHIER_PRO5_ID:
return 2;
case UNIPHIER_PXS2_ID:
case UNIPHIER_LD6B_ID:
return 4;
default:
return 1;
}
}
static void uniphier_smp_kick_all_cpus(void)
{
const u32 target_ways = BIT(0);
size_t trmp_size;
u32 trmp_src = (unsigned long)uniphier_smp_trampoline;
u32 trmp_src_end = (unsigned long)uniphier_smp_trampoline_end;
u32 trmp_dest, trmp_dest_end;
int nr_cpus, i;
int timeout = 1000;
nr_cpus = uniphier_get_nr_cpus();
if (nr_cpus == 1)
return;
for (i = 0; i < nr_cpus; i++) /* lock ways for all CPUs */
uniphier_cache_set_active_ways(i, 0);
uniphier_cache_inv_way(target_ways);
uniphier_cache_enable();
/* copy trampoline code */
uniphier_cache_prefetch_range(trmp_src, trmp_src_end, target_ways);
trmp_size = trmp_src_end - trmp_src;
trmp_dest = trmp_src & (SZ_64K - 1);
trmp_dest += SZ_1M - SZ_64K * 2;
trmp_dest_end = trmp_dest + trmp_size;
uniphier_cache_touch_range(trmp_dest, trmp_dest_end, target_ways);
writel(trmp_dest, UNIPHIER_SMPCTRL_ROM_RSV2);
asm("dsb ishst\n" /* Ensure the write to ROM_RSV2 is visible */
"sev"); /* Bring up all secondary CPUs from Boot ROM into U-Boot */
while (--timeout) {
int all_booted = 1;
for (i = 1; i < nr_cpus; i++)
if (!uniphier_smp_booted[i])
all_booted = 0;
if (all_booted)
break;
udelay(1);
/* barrier here because uniphier_smp_booted[] may be updated */
cpu_relax();
}
if (!timeout)
pr_warn("warning: some of secondary CPUs may not boot\n");
uniphier_cache_disable();
}
void psci_board_init(void)
{
unsigned long scu_base;
u32 scu_ctrl, tmp;
asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (scu_base));
scu_ctrl = readl(scu_base + 0x30);
if (!(scu_ctrl & 1))
writel(scu_ctrl | 0x1, scu_base + 0x30);
scu_ctrl = readl(scu_base + SCU_CTRL);
scu_ctrl |= SCU_ENABLE | SCU_STANDBY_ENABLE;
writel(scu_ctrl, scu_base + SCU_CTRL);
tmp = readl(scu_base + SCU_SNSAC);
tmp |= 0xfff;
writel(tmp, scu_base + SCU_SNSAC);
uniphier_smp_kick_all_cpus();
}
void psci_arch_init(void)
{
u32 actlr;
asm("mrc p15, 0, %0, c1, c0, 1" : "=r" (actlr));
actlr |= 0x41; /* set SMP and FW bits */
asm("mcr p15, 0, %0, c1, c0, 1" : : "r" (actlr));
}
u32 uniphier_psci_holding_pen_release __secure_data = 0xffffffff;
s32 __secure psci_cpu_on(u32 function_id, u32 cpuid, u32 entry_point,
u32 context_id)
{
u32 cpu = cpuid & 0xff;
debug_puts("[U-Boot PSCI] psci_cpu_on: cpuid=");
debug_puth(cpuid);
debug_puts(", entry_point=");
debug_puth(entry_point);
debug_puts(", context_id=");
debug_puth(context_id);
debug_puts("\n");
psci_save(cpu, entry_point, context_id);
/* We assume D-cache is off, so do not call flush_dcache() here */
uniphier_psci_holding_pen_release = cpu;
/* Send an event to wake up the secondary CPU. */
asm("dsb ishst\n"
"sev");
return PSCI_RET_SUCCESS;
}
void __secure psci_system_reset(void)
{
reset_cpu();
}
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