forked from luck/tmp_suning_uos_patched
35e75645f1
Almost all Exynos-series of SoCs that run in secure mode don't need additional offset for every CPU, with Exynos4412 being the only exception. Tested on Origen-Quad (Exynos4412) and Arndale-Octa (Exynos5420). While at it, fix the coding style (space around *). Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Tested-by: Andreas Faerber <afaerber@suse.de> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 2012 Samsung Electronics.
|
|
* Kyungmin Park <kyungmin.park@samsung.com>
|
|
* Tomasz Figa <t.figa@samsung.com>
|
|
*
|
|
* This program is free software,you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/io.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include <asm/firmware.h>
|
|
|
|
#include <mach/map.h>
|
|
|
|
#include "common.h"
|
|
#include "smc.h"
|
|
|
|
static int exynos_do_idle(void)
|
|
{
|
|
exynos_smc(SMC_CMD_SLEEP, 0, 0, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_cpu_boot(int cpu)
|
|
{
|
|
/*
|
|
* Exynos3250 doesn't need to send smc command for secondary CPU boot
|
|
* because Exynos3250 removes WFE in secure mode.
|
|
*/
|
|
if (soc_is_exynos3250())
|
|
return 0;
|
|
|
|
/*
|
|
* The second parameter of SMC_CMD_CPU1BOOT command means CPU id.
|
|
* But, Exynos4212 has only one secondary CPU so second parameter
|
|
* isn't used for informing secure firmware about CPU id.
|
|
*/
|
|
if (soc_is_exynos4212())
|
|
cpu = 0;
|
|
|
|
exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
|
|
{
|
|
void __iomem *boot_reg;
|
|
|
|
if (!sysram_ns_base_addr)
|
|
return -ENODEV;
|
|
|
|
boot_reg = sysram_ns_base_addr + 0x1c;
|
|
|
|
/*
|
|
* Almost all Exynos-series of SoCs that run in secure mode don't need
|
|
* additional offset for every CPU, with Exynos4412 being the only
|
|
* exception.
|
|
*/
|
|
if (soc_is_exynos4412())
|
|
boot_reg += 4 * cpu;
|
|
|
|
__raw_writel(boot_addr, boot_reg);
|
|
return 0;
|
|
}
|
|
|
|
static const struct firmware_ops exynos_firmware_ops = {
|
|
.do_idle = exynos_do_idle,
|
|
.set_cpu_boot_addr = exynos_set_cpu_boot_addr,
|
|
.cpu_boot = exynos_cpu_boot,
|
|
};
|
|
|
|
void __init exynos_firmware_init(void)
|
|
{
|
|
struct device_node *nd;
|
|
const __be32 *addr;
|
|
|
|
nd = of_find_compatible_node(NULL, NULL,
|
|
"samsung,secure-firmware");
|
|
if (!nd)
|
|
return;
|
|
|
|
addr = of_get_address(nd, 0, NULL, NULL);
|
|
if (!addr) {
|
|
pr_err("%s: No address specified.\n", __func__);
|
|
return;
|
|
}
|
|
|
|
pr_info("Running under secure firmware.\n");
|
|
|
|
register_firmware_ops(&exynos_firmware_ops);
|
|
}
|